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Principle and Maintenance of DK1050S Contents l Chapter One Introduction to DK1050S 1. Functions 2. Complete-machine diagram 3. IC components of complete machine l Chapter Two Working principle of servo circuit 1. Digital signal processing 2. Control signal processing l Chapter Three Working principle of decoder circuit 1. System control circuit 2. Audio/video frequency circuit l Chapter Four Working principle of power switch 1. Diagram of components 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process Appendix: Introduction to IC Information and Circuit diagram

Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

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Page 1: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

Principle and Maintenance of DK1050S

Contents

l Chapter One

Introduction to DK1050S 1. Functions 2. Complete-machine diagram 3. IC components of complete machine

l Chapter Two

Working principle of servo circuit 1. Digital signal processing 2. Control signal processing

l Chapter Three

Working principle of decoder circuit 1. System control circuit 2. Audio/video frequency circuit

l Chapter Four

Working principle of power switch 1. Diagram of components

2. Principle of circuit

l Chapter Five

Working principle of panel control 1. Working principle

Typical trouble shooting process

Appendix: Introduction to IC Information and Circuit diagram

Page 2: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

Analysis of Working Principle of DK1050S

Chapter One Introduction to DK1050S

1. Functions

DK1050S is a medium- low-end machine integrating disk player and amplifier.

Its main features are:

1). Disk player uses “Sanyo loader + MT1389” scheme;

2). Amplifier uses digital power amplification circuit, low distortion; power IC is TAS5112DFD;

3). Audio processor is TAS5508, high integration and good performance/price ratio;

4). With radio function; save-up to 40 radio stations

5). Power uses switch-mode power design with small volume, high efficiency and stable

performance;

6). With SCART (CVBS/RGB) interface;

7). Auxiliary channel input/output function;

8). Earphone output function;

9). Karaoke function and auto accompaniment function;

10). RSD support function;

11). Stand-by function, power consumption lower than 3W.

12) Decoder for Digital audio input (Optical, Coaxial)

13) Bass booster function to balance the Movie effect

2. Diagram of DK1050S complete-machine components and table of integrated circuit

functions:

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2. Table of DK1050S integrated circuit functions

Circuit Board

P/N Name Function

Loader Sanyo loader Disk signal picking

U201 MT1389

RF signal processing, digital signal processing, servo processing, MPEG

decoder, line-by-line scanning, system control

U202 AT24C02 Serial EEPROM, status memory

U205 HCU04 6 inverter

U209 LM1117MP-1.8 1.8V power supply

U211 AE45164016 64Mbit SDRAM

U214 29LV160BE 16Mbit FLASH ROM

Main board

U302 D5954 4-channel servo drive circuit

N102 PT6317 Panel control, VFD play drive Panel

N103 REMOT Remote radio head

16M ROM

SDRAM

Sanyo

Loader

Focus TRS

Feed Main axis

Load Load drive

Power circuit Panel circuit

State storage

Digital amplify

Trimming

Servo drive

Digital servo processing

Digital signal processing

AV

out circuit

Composite video

S-video

Y/Cb/Cr

6-channel audio out

Optical, coaxial

MT1389

BA5954

5508,5112

HCU04

AT24C02

29LV160BE

Progressive out

Y/Pb/Pr

VGA

Figure 1

Tuner, optical, coaxial

Page 4: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

U501 NCP1200D Power switch circuit

U502 HS817 coupling amplifier

U503 HA17431 2.5V reference voltage comparer

U108 LM7805 5V three-terminal power supply

U504 0880 Power switch circuit

U506 HS817 coupling amplifier

Power switch

U507 LM431 2.5V reference voltage comparer

N12 5508 Digital signal processing

N13/14 5112 Power amplification

N8/9 TLV272 Computation of amplification

Amplifier board

N10/11 RC4580 Digital signal amplification

Chapter Two Working Principle of Servo Circuit

1. Digital signal processing

DK1050S uses Sanyo’s double-beam super error correction loader and MTK decoding scheme. Its servo circuit mainly consists of advanced signal processing, digital servo processing, digital signal processing IC MT1389 and drive circuit BA5954, of which MT1389 is also one of the main components of the decoder circuit. Signals A, B, C, D, E, F, SA, SB and RFO, transmitted from the loader, are input from pins 2-13 of MT1389 and, after being amplified via the internal pre-amplifier of MT1389, are divided into two parts in MT1389: One part of these signals, after being processed by MT1389’s internal digital servo signal circuit, form corresponding servo control signals and output control signals focus (FOSO), tracking (TRSO), main axle (DMSO) and feed (FMSO) from MT1389’s Pin P42, Pin P41, Pin P37 and Pin P38 respectively, which are then sent to the drive circuit BA5954 for drive amplification. After drive amplification, these output control signals drive the focus coil, tracking coil, Main axle motor and feed motor respectively. Focus and tracking servos are used for correcting object lens and enable laser beams to correctly read signals from CD; feed servo is used for driving laser head to make radial movement to scan the disk; main axle servo is used to control the Main axle motor to read signals at constant linear velocity to drive the disk. The other part of the signals, after amplification, equal frequency compensation, etc via the internal voltage-controlled amplifier (VCA) of MT1389, are converted by the internal A/D

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converter into digital signals and, when the loader reads CD/VCD signals, these signals are EFM demodulated in MT1389 and, after CIRC error correction in MT1389, are output for post audio and video frequency decoding; when the loader reads DVD signals, these signals are ESM demodulated in MT1389 and, after RSPC error correction in MT1389, are sent for post decoding.

2. Control signal processing

1). Laser power auto control. The circuit is as shown in Diagram 2.

Diagram 2 MT1389 has an internally integrated APC (auto optical power control) circuit. Pin 20 is the pin for VCD laser power strength detection signal input, Pin 21 is pin for DVD laser power strength detection signal input and Pin 23 is pin for VCD/CD laser power drive control output. When it is detected by Pin 20 that laser output power is too strong, MT1389’s internal circuit will process it so voltage output by Pin 23 will increase and V302 (2SB1132) conductivity will decrease,then the

collector electrode voltage will drop, the voltage supplied to the laser tube will also drop, the light from the laser head will become weaker, thus automatically adjusting the laser power output. Pin 22 is the pin for DVD laser power drive control output and the control process is similar to that of VCD. 2). Inject/Eject control circuit. The circuit is as shown in Diagram 3.

Diagram 3 What is different form the previous MTK circuit is MT1389 has an internally integrated advanced signal processing circuit, and the inject/eject control signals are processed by MT1389. The inject

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control signal are processed by Pin 51 of MT1389 and the eject control signal is processed by Pin 39 of MT1389. When we press the inject button, Pin 51 of MT1389 is high level and Pin 39 is low level. Now, the triode V308 conducts and the passes resistance R323, making the base of V306 low level. V306 also conducts. The direction of current is as shown in the following diagram:

Power supply voltage VCC ? V306 E-C junction? motor positive end LOAD+ ? motor negative end LOAD- ? V308 C-E junction ? ground

So the motor runs clockwise and completes the inject operation. When we press the eject key, Pin 51 of MT1389 is low level and Pin 39 is high level. Now the triode V307 conducts and passes resistance R324, making the base of V309 low level. V309 also conducts. The direction of current is as shown in the following diagram:

Power supply voltage VCC ? V309 E-C junction? motor negative end LOAD+ ? motor positive end LOAD- ? V307 C-E junction ? ground So the motor runs counterclockwise and completes the eject operation.

3). Main axle motor control braking circuit. The circuit is as shown in Diagram 4. In order to extend the service life of the motor and reduce the impact of starting current on the motor, when there is a disk, our R&D personnel design the main axle motor to be always at the status of running, so even if “STOP” key is pressed, the disk will not stop running. This way, when we press the “EJECT” key, a braking signal is needed to immediately stop the main axle motor and the “EJECT” operation can be completed within a short period of time. When it is playing, if we press the “EJECT” key, the main axle drive signal will disappear, but the main axle motor, due to the effect of moment, will still run. At this time, the electromotive force generated by the motor operation can obtain induction voltage on the sampling resistances R321 and R340 and, through resistances R319 and R320, adds them to Pin 36 and Pin 35 of

MT1389, and after internal processing and amplification in MT1389, is output from Pin 34, then

4

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sent to Pin 47 of MT1389 via R318. After internal analog/digital conversion and corresponding processing, MT1389 outputs a transient motor anti-braking signal from its Pin 37, thus immediately stopping the main axle motor to ensure that the disk no longer evolves when it is being ejected.

3. Servo drive circuit

The servo drive of this machine uses one 4-channel BA5954 drive circuit. This circuit is specially designed for servo. The circuit is as shown in Diagram 5. MT1389 digital servo circuit generates four servo control signals: Focus control signal, tracking control signal, feed control signal and main axle control signal. These signals are respectively added to Pin 1, Pin 26, Pin 23 and Pin 5 of BA5954. After being amplified by BA5954 drive, the focus control signal and tracking control signal are output from Pin 13, Pin 14 and Pin 15, Pin 16 of BA5954 and then added to the focus and tracking coils to drive the laser head to complete the focus and tracking operations. Feed and main axle drive signals are output from Pin 17, Pin 18 and Pin 11, Pin 12 of BA5954 and then added to the feed motor and main axle motor to drive the laser head to make radial movement and make the disk evolve at constant linear velocity.

Pin 28 (STBY) of BA5954 outputs enable/disable signals. Only when this pin is high level can the output terminal outputs drive voltage.

Chapter Three Working Principle of Decoder Circuit

The decoder circuit of this machine mainly consists of the decoder chips MT1389, SDRAM AE45164016, FLASH ROM 29LV160BE, audio frequency DAC CS4360, etc.

1. System control circuit

1). Resetting circuit is as shown in Diagram 6:

Focus coil

Tracking coil

Feed motor

Main axle motor

Diagram 5

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Diagram 6 The resetting circuit of this machine consists of the triode Q204 9014, resetting capacitor TC217 22uF/16V and inverter U205 HCU04. When we open the machine, because the end voltage of the capacitor cannot change suddenly, Q204 base is low level. The emitter of Q204 is low level and, after secondary inversion and trimming by U205, outputs low-level resetting signal to Pin 110 of MT1389 to provide resetting for MT1389. When charging ofTC217 is finished, Q204 base changes to high level and Q204 conducts. Its emitter is high level and, after secondary inversion and trimming by U205, it outputs high level and adds it to Pin 110 of MT1389 to enable it to maintain high level during normal operation.

2). Clock circuit X201 27MHz crystal oscillator, C275/27PF, C276/27PF and inverter HCU04 form the clock oscillation circuit. The clock signal generated passes R244 and R248 and is then added to Pin 229 and Pin 228 of MT1389 to provide MT1389 with working clock.

3). Data communication circuit The data communication circuit of this machine mainly consists of the decoder chip MT1389, SDRAM AE45164016 and FLASH ROM 29LV160BE. It is shown in Diagram 7. MT1389 is a super large-scale integrated circuit, whose working voltages are +3.3V and +1.8V. Its main functions are advanced RF small signal processing, digital servo processing, digital signal processing, MPEG decoding, video decoding, etc. At the same time, the built- in MCU of MT1389 is also the system control circuit of complete machine. AE45164016 is a 4M*16bit large-capacity SDRAM. Its working voltage is +3.3V. The 6ns module used in DV971 is very fast and its maximum working frequency can reach 166MHz. As the working buffer memory of decoder chip MT1389, its main function is to store the audio and video data flows in the time of decoding. 29LV160BE is FLASH ROM, whose capacity is 16Mbit and working voltage is +3.3V. It is mainly used to store user information, such as OSD characters, working micro-codes, starting LOGO, ETC.

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2. Audio/video output circuit

1). Video output circuit DK1050S not only outputs three interleave video signals: CVBS composite video signal, S terminal Y-C signal and Y/Cb/Cr color difference signal, but also outputs two line-by-line video signals: Y/Pb/Pr line-by-line color difference signal and VGA line-by-line signal. Its decoder chip MT1389 has a built- in video encoder circuit that can directly outputs analog composite video signal CVBS, S terminal, color-difference signal and VGA signal. CVBS composite video signal is output from Pin 198 of MT1389; S terminal signal Y-C is output from Pin 194 and Pin 196 of MT1389; color difference signal and R-B-G signal in VGA interface are output from Pin 203, Pin 202 and Pin 200 of MT1389; synchronous signals HSYNC and VSYNC of line and field in VGA interface are output respectively from Pin 207 and Pin 205 of MT1389. It must be noted that interleave color difference, line-by-line color difference signal and line-by-line R-B-G signal are output from the same pin. So the corresponding signal output shall be selected through setting according to the port connected to TV; otherwise, there might be sound without picture. 2). Audio output circuit After being processed by MT1389, the audio frequency signal outputs data signals of five audio tracks from its Pin 217, Pin 218 and Pin 219, and outputs clock signals of five channels from its Pin 214 and Pin 215. These signals, after passing IC 74HCT125, are sent to the audio frequency signal processing IC TAS5508 for audio frequency signal processing (see Exhibit for detailed IC data). After that, ten groups of PWM signals are output, six of which are sent to power amplification, two are sent to earphone output and two sent to auxiliary channels. Of the six groups of signals sent to the power amplification IC, the surround sound and super bass share one N13 IC TAS5508 and the main audio track and the middle share N14 IC TAS5508. Signals are amplified in this IC. Because it is digital high-frequency signal amplification, the efficiency is very high and the heating value of power IC is very small. After amplification, the

CLK

DQML DQMH

CKE

113

RAS CAS CS WE

BA0 BA1

15 39 38 37 18 17 19 16 20 21

137 156 157 140 139 142 138 145 143

DMA0—DMA11

DQ0—DQ15

77

A0—A21

AD0—AD7

DCE

DRD

DWR

RY/BY

BYTE

AE45164016 MT1389

29LV160BE 26

28

11

15

47

79

66

VD

GND

Diagram 7

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output is still digital signal, so in order for output in the speaker, the amplified digital signal shall be processed before output. For a PWM signal that contains audio frequency signals, because the high-frequency signal’s frequency is very high and exceeds the hearing of human ear, so we can neglect the influence of high-frequency signals in the process of processing and only restore low-frequency audio frequency signals.

TAS5508 is an advanced 8-channel digital high-performance IC modulated by pulse width. It applies to processing of most audio frequency digital signals and presents good noise coefficients and dynamic range within 20— 20KHZ. Its characteristics are as follows:

(1) Auto control over clock speed and data sampling speed; (2) 8 groups of channels for audio frequency input; (3) 8 groups of PWM output that can be configured into 6-channel stereo sound output line or

8-channel line output; (4) Line output is one group of PWM signals drives one different input open-loop amplifier.

IC TAS5112 is a high-performance audio frequency digital power amplifier. When bridged with a 6-ohm load, each channel can output up to 50W and has a 95DB dynamic range. The distortion is low and power efficiency can reach 90%. The heating value is low. It provides low-voltage protection, hi-temperature protection, over-current protection, etc, and has a built- in drive power adjustment door circuit. It is suitable for home theaters, DVD receivers, mini composite acoustics, etc. Please see the appendix for detailed introduction to IC. When the disk is normally read, the digital signals and clock signals processed from 1389, after selection by IC 74HCT125, are sent to Pins 26-31 of IC TAS5508 for processing. Now, plug in the earphone, the PH-SEL is high level and MUTE, when normally working, is also high level. Pin 37 of TAS5508 is also high level. The oscilloscope can detect all data lines and clock lines. Of the signals from 5508, one group is sent to N8 and N9 and, after processing, is output from the auxiliary channel; one group is sent to the earphone for processing; PWM signals are sent to the amplifier for amplification. When the earphone is plugged in, the PH-SEL signal is peremptorily short circuited to the earth and changes to low level. The amplifier is mute, but the auxiliary channel output is normal. When reading the disk, the system by default selects Karaoke for input. So, when playing the disk, Karaoke can be opened and this machine also has the auto accompaniment function that is realized by software. When playing VCD, if the system detects external input, it automatically shields the human voice signal in the disk and only keeps the accompanying sound. DK1050S has the radio function and can receive RDS signals. Radio head control lines CE, DI, CL and DO, through 28P drop-out lines, are respectively connected to MT1389. When any control line is abnormal, radio function will become abnormal. The RDS signal received by the radio head is sent to special-purpose IC SAA6588 for processing. 3. Auxiliary channel, optical fiber and co-axial input This machine has auxiliary channels, radio function, optical fiber and co-axial external input. This machine has radio function, and auxiliary channel input function and Karaoke function. All external input shall be selected by N3 CD4052 and then undergo the analog/digital conversion via N7 CS5340 and be sent to MT1389 for signal processing. Subsequent processing and output share the same process as normal disk reading signal output. Optical fiber and co-axial signals, after inductance filtering and capacitance filtering, are sent to the

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serial audio frequency digital signal to receive the input Pins 4, 12 and 14 of signal IC CS8415. After passing this IC, the serial audio frequency digital signal is converted into PCM signal, which is then output from Pin 16 (sampling rate signal), Pin 17 (clock signal of main track) and Pin 18 (audio frequency digital signal) of IC and sent to IC 1389 for signal processing.

Chapter Four Working Principle of power board

This machine has two groups of power supply. One group supplies power for the decoder board and small-power IC; the other group supplies power for the power amplification IC and the voltage is high. But both groups have the same design principle. Introduction to the principle of circuit The 220V AC current passes the power plug, protector tube, varistor R501 and common mode rejections BC501 and L501 and is added to the integrated bridge rectification circuit. The diode is IN4007 that has a good performance/price ratio and has a higher durable pressure than IN4001. After bridge rectification, 311V is output and flows through TC501 filter, then is respectively added to two transformers and sent to the DRAIN control pin of switch modules U501 and U502. The power supply working voltage of IC is directly rectified, filtered, divided by the resistor and then supplied to IC. Diode D508, capacitor C516 and resister R516 form the absorb circuit to provide windings 1-4 of the transformer with the discharge circuit for reverse electromotive force. Pin FB controlling the IC is the feedback control pin. According to its current, the pulse width’s conduction and starting and ending time are determined to ensure the stability of voltage output. Five branch circuits are coupled to secondary via the transformer.

1. Voltage output from Pins 11 and 13 of transformer T502, after being rectified and filtered, outputs a group of +28V voltage for power amplification IC;

2. Voltage output from Pin 16 of transformer T501, after being rectified and filtered, outputs a group of +12V voltage that, after being rectified by IC LM7805, outputs a group of +5V voltage; 3. Voltage output from Pin 14 of transformer T501, after being rectified and filtered, outputs a +5V voltage to supply one end of coupling amplifier U502;

4. Voltage output from Pin 12 of transformer T501, after being rectified and filtered, outputs a +3.3V voltage and to supply a group of stable voltages for CPU;

5. Voltage output from Pin 9 of transformer T501, after being rectified and filtered, outputs a group of 21V voltage for displayer driver IC. Clamp ZD501 on -21V supplies panel display screen with filament voltage. Voltage to ground of FL+ and FL- is about -16V.

Because the two groups of power switches of the machine have different working principles, here we only analyze the group that supplies CPU with +5V voltage. Feedback sampling of this group of power supply comes from 5V. It supplies the coupling amplifier HS817 via D514 and R517. At the same time, it is divided by R519 and R520 to supply the reference voltage pin R of 2.5V comparator. When 5V is high, the Pin KA of comparator LM17431A conducts, passes photoelectrical coupler HS817 and is sent to the fourth pin of switch IC 5L0380R to reduce the conduction time of internal switch tube, reduce the coupling of transformer, lower the 5V output and achieve the goal of automatic regulation and vice versa. It must be noted that, in this power switch, the two groups of power switches use a base voltage that is different from IC. The group supplying the amplifier outputs a higher voltage, so it uses

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LM431 that has better performance and a higher endurable pressure. However, the group supplying 3.3V voltage, because the output voltage is low, uses 17431. Because these two kinds of IC are different, care shall be taken in the process of maintenance to avoid confusion. This machine uses DC switches.

When the power of the machine is just on, voltage output from Pin No.16 of transformer, after being rectified by D507 half wave, generates a 76V high-frequency voltage on silicon-controlled pin 1. This voltage passes capacitors C507 and R513 and is coupled to Pin No.3 of Q501, the same high-frequency voltage. Because of the effect of feedback stable voltage, Pin No.2 of Q501 gets a stable 5V DC voltage. Its wave shape is as follows: It can be seen from the above diagram that when T=t01, Pin P1 of Q501is high level and Pin P3 of Q501 is also high level and Q501 deducts and Pin P3 outputs a 5V DC voltage; when T=t12, Pin P1 of Q501 and Pin P3 of Q501 are low level and, because U2 > U1, Q501 stops and Pin P3 does not output voltage and 5 VDC voltage is supplied by capacitor TC505; At the moment the power is on, the voltage of U1 is 76V. But, because the conduction of silicon-controlled, Pin P2 of Q501shall be maintained at 5V causing the voltage of U1 to drop to around 7V, so other secondary windings do not output. Power switch only outputs CPU5V and the power supply is at the low-load working status. When the machine is open, only 5V is supplied to the panel via transformer coupling and the complete machine is stand-by. When pressing the stand-by on the panel or on the remote controller, Pin 40 of panel IC TP6317 outputs a high level and triode V503 conducts, giving Pole G of Q501a low level and silicon-controlled Q501 stops. Triode V504 conducts and triode V502 stops. Other windings begin to work normally.

U1

t

U3

U2

t

t

0 1 2

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Chapter Five Panel Control and VFD Display Circuit The panel mainly consists of the VFD display screen, drive IC TP6317, remote receiving head HSOO38A2, keys control and indicator display circuit. It mainly accomplishes the man-machine dialogue and displays the working status. Diagram of components is as follows:

Under the control of built-in CPU of MT1389 and via VFDST (status), VFDCK (clock) and VFDAT (data), U401 IC TP6317 is controlled to display complete-machine working status and receive the user control command given by TP6317 to control the complete-machine control circuit and enable complete machine to work under designated status. When pressing the user operating panel key, the control command via the key scans the circuit and sends control command to IC TP6317. After internal encoder drive of IC TP6317, control data is output from Pin 5 and Pin 6 (VFDAT) to internal CPU of MT1389 and the CPU controls the controlled circuit and controls VFD via IC TP6317. VFD401 is a vacuum fluorescent display screen. Its most obvious feature is height. Its working princip le is similar to TV display tube. Pins 1, 2, 34 and 35 supply the filament; Pins 27-32 supply the GRID poles. In each GRID there are 16 different characters for display. Pins 4-19 are SEG poles. CPU, through controlling IC TP6317, finally controls SEG poles, thus enabling the characters of working status to display on the display screen.

Remote receiving head circuit mainly consists of remote receiving head HS0038A2. Pin No.1 is for grounding, Pin No.2 is the supply end and Pin No.3 is the output pin for received signals and is directly connected to the CPU inside MT1389 to control corresponding circuit. This machine has the earphone output function. One of the pins inside the earphone is directly connected to TAS5508. When the earphone is plugged in, detection line H-DET is grounded and becomes low level. When Pin 12 of TAS5508 becomes low level, the amplifier partially outputs mute; when it works normally, the detection pin is high level (about 3.3V).

U401

IC TP6317

VFD

display

Key control

U201

MT1389

Remote receiving

Panel indicator control

VFDST VFDCK VFDAT

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Typical Trouble Shooting Process

1. Key-point voltages of DK1050S

Decoder circuit Resetting 1. U205 (HCU04), Pin 8, about 5V 2. MT1389, Pin 110, about 5V 3. FLASH ROM, Pin 12, about 5V Clock: 27MHZ crystal oscillator, both ends, about 0.77V I2C bus SDA, 3.3V I2C bus SCL, 3.3V

Servo circuit: LD01: 3.3V; LD02: 3.3V V301 and V302 collector electrode LD, voltage: 2.3V BA5954 Pin 4 base voltage: 1.4V BA5954 Pins 15 &16, tracking drive output, about 2.5V. BA5954 Pins 17 & 18, feed drive output, about 2.5V BA5954 Pins 13 & 14, focus drive signal output, about 2.5V BA5954 Pins 11 & 12, main axle drive output, about 2.5V BA5954 Pin 1, focus control signal input 1.4V BA5954 Pin 5, main axle control signal input 1.4V

BA5954 Pin 26, tracking control signal input 1.4V BA5954 Pin 23, feed control signal input 1.4V Amplifier circuit: TAS5508 Pin 9, power supply pin, 3.3V TAS5112 32, 33, 40, 41, 44, 45, 52 and 53 power supply 28V.

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2. Main trouble shooting process

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Page 17: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

Appendix: Introduction to IC Data

1. MT1389

MT1389 uses LQFP 256-pin encapsulation and 3.3V/1.8V dual voltage working mode. It is a good-performance and large-scale CD-ROM and DVD-ROM front-end CMOS integrated circuit and a special-purpose single chip for CD/VCD/DVD player. It has focus servo error amplification and tracking servo amplification functions and RF horizontal output servo control. Its main functions are: Pre-processing of RF small signals. Its main function is to process and amplify RF signals transmitted by laser head and to automatically regulate the laser power output. At the same time, it identifies VCD disks and DVD disks. Digital-servo processing. It can generate focus, tracking, feed and main axle servo control signals. Digital-signal processing completes EFM/EFM+ DEMODULATION of RF signal. MPEG-1/MPEG–2/MPEG4/JPEG Video decoding. This chip decodes not only VCD and DVD but also MPEG 4 network video. It can also decode “Movie Network” disks and at the same time can read JPEG pictures to play digital albums. In terms of audio frequency, it not only dual decodes AC-3/DTS, but also reads MP3. It can also decode DVD-Audio to achieve a high-resolution tonal quality that is 1000 times higher than CD. Using the built-in 8032 micro processor of the chip, MT1369E can also achieve the system control function of the complete machine, thus greatly simplifying the circuit design.

MT1389 pins have the following functions:

Pin Name Function

1 AGND Analog earth

2 DVDA DVD-RF hi-frequency AC coupling signal A

3 DVDB DVD-RF hi-frequency AC coupling signal B

4 DVDC DVD-RF hi-frequency AC coupling signal C

5 DVDD DVD-RF hi-frequency AC coupling signal D

6 DVDRFIP DVD-RF hi-frequency AC coupling signal

RFIP input

7 DVDRFIN DVD-RF hi-frequency AC coupling signal

RFIN input

8 MA DVD-RAM main beam RF DC signal input A

9 MB DVD-RAM main beam RF DC signal input B

10 MC DVD-RAM main beam RF DC signal input C

11 MD DVD-RAM main beam RF DC signal input D

12 SA DVD-RAM auxiliary beam RF DC signal

input A

13 SB DVD-RAM auxiliary beam RF DC signal

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input B

14 SC DVD-RAM auxiliary beam RF DC signal

input C

15 SD DVD-RAM auxiliary beam RF DC signal

input D

16 CDFON CD focus error inverted input

17 CDFOP CD focus error positive input

18 TNI 3-beam auxiliary PD signal inverted input

19 TPI 4-beam auxiliary PD signal positive input

20 MDI1 Laser power monitoring input 1

21 MDI2 Laser power monitoring input 2

22 LDO2 Laser power output 2

23 LDO1 Laser power output 1

24 SVDD3 Servo 3.3V power supply

25 CSO/RFOP Main servo signal output/RF positive output

26 RFLVL/RFON RF level output/RF inverted output

27 SGND Servo earth

28 V2REFO Reference voltage 2.8V

29 V20 Reference voltage 2.0V

30 VREFO Reference voltage 1.4V

31 FEO Focus error signal output

32 TEO Tracking error signal output

33 TEZISLV Tracking over-zero error input

34 OP_OUT Sensor signal amplification output

35 OP_INN Sensor signal inverted input

36 OP_INP Sensor signal in-phase input

37 DMO Main axle control signal output

38 FMO Feed control signal output

39 TROPEN PWM OPEN signal output

40 PWMOUT1/ADIN9 No.1 pulse width modulation signal

output/AD general input

41 TRO Tracking control signal output

42 FOO Focus control signal output

43 USB_VSS USB earth

44 USBP USB data

45 USBM USB data

46 USB_VDD3 USB 3.3V power

47 FG/ADIN8 Motor Honeywell Sensor signal input/AD

Page 19: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

general input

48 TDI/ADIN4 OPEN detection signal input/AD general

input

49 TMS/ADIN5 CLOSE detection signal input/AD general

input

50 TCK/ADIN6 BA5954 enable signal output/Ad general

input

51 TDO/ADIN7 CLOSE signal output/AD general input

52、97、122、152、173、221

DVDD18 Digital 1.8V power supply

53-58 IOA2-7 Micro controller address bit 2-7

59 HIGHA0 Micro controller address bit 0

60、61 IOA18-19 Micro controller address bit 18-19

62、85、94、116、119、134、144、148、161、163、175、216、223

DVSS Digital earth

63 APLLCAP Analog phase lock loop external capacitor

64 APLLVSS Analog phase lock loop earth

65 APLLVDD3 Analog phase lock loop3.3V power supply

66 IOWR FLASH read-and-write control signal

67-72 HIGHA3-7 Micro controller address bit 3-7

73、80、108、127、141、155、167、182、204、212

DVDD3 Digital3.3V power

74、75 HIGHA1-2 Micro controller address bit 1-2

76 IOA20 Micro controller address bit 20

77 IOCS FLASH chip selection

78 IOA1 Micro controller address bit1

79 IOOE FLASH output enable

81-84 AD0-3 Micro controller address /data bit0-3

86-88 AD4-6 Micro controller address /data bit4-6

89 IOA21/ADIN0 Micro controller address bit 21/AD general

input

90 ALE Micro controller address enable

91 AD7 Micro controller address /data bit 7

92 A17 FLASH address bit 17

93 IOA0 Micro controller address bit 0

Page 20: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

95 UWR Micro controller write operation

96 URD Micro controller read operation

98 UP1_2-1_7 Micro controller port

104 UP3_0 Micro controller port

105 UP3_1 Micro controller port

106 UP3_4 Micro controller port

107 UP3_5 Micro controller port

109 ICE Micro controller correction mode enable

110 PRST Resetting input

111 IR Remote control signal input

112 INT0 Micro controller break 0

113 DQM0 DRAM input/output shield signal

114 DQS0 DRAM input/output shield signal

115 RD7 DRAM data

117-118 RD5-6 DRAM data

120-121 RD3-4 DRAM data

123-125 RD0-2 DRAM data

126 RD15 DRAM data

128-133 RD9-14 DRAM data

135 RD8 DRAM data

136 DQS1 DRAM input/output shield signal

137 DQM1 DRAM input/output shield signal

138 RWE DRAM write enable

139 CAS DRAM column address selection

140 RAS DRAM row address selection

142 RCS DRAM chip selection

143 BA0 DRAM section address 0

145 BA1 DRAM section address 1

146 RA10 DRAM address

147 RA0 DRAM address

149 RA1-3 DRAM address

153 RVREF/ADIN3 Reference voltage/AD general input

154 RCLKB DRAM clock

156 RCLK DRAM clock

157 CKE DRAM clock enable

158 RA11 DRAM address

159-160 RA8-9 DRAM address

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162 RA7 DRAM address

164 RA4-6 DRAM address

168 RD13/ASDATA5 DRAM data/audio frequency serial data

169 RD27-30 DRAM data

174 RD26 DRAM data

176-177 RD24-25 DRAM data

178-179 DQM2-3 DRAM input/output shield signal

180-181 RD22-23 DRAM data

183-188 RD16-21 DRAM data

189 DACVDDC Digital/analog conversion 3.3V power

190 VREF Reference voltage

191 FS

192 YUV0/CIN

193 DACVSSC Digital/analog conversion earth

194 YUV1/Y Video signal YUV1 output /Y signal output

195 DACVDDB Digital/analog conversion 3.3V power

196 YUV2/C Video signal YUV2 output /C signal output

197 DACVSSB Digital/analog conversion earth

198 YUV3/CVBS Video signal YUV3 output /CVBS signal

output

199 DACVDDA Digital/analog conversion 3.3V power

200 YUV4/G Video signal YUV4 output /G signal output

201 DACVSSA Digital/analog conversion earth

202 TUV5/B Video signal YUV5 output /B signal output

203 YUV6/R Video signalYUV6 output /R signal output

205 VSYNC/ADIN1 Field synchronization signal output /AD

general input

206 YUV7/ASDATA5 Video signal YUV7 output / audio frequency

serial data

207 HSYNC/ADIN2 Row synchronization signal output/AD

general input

208 SPMCLK

209 SPDATA

210 SPLRCK

211 SPBCK/ASDATA5

213 ALRCK Audio frequency right/left track clock

214 ABCK Audio frequency bit clock

215 ACLK Audio frequency DAC external clock

Page 22: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

217-220 ASDATA0-3 Audio frequency serial data

222 ASDATA4 Audio frequency serial data

224 MC_DATA Microphone digital audio frequency input

225 SPDIF Digital audio frequency signal output

226 RFGND18 RF signal earth

227 RFVDD18 RFsignal1.8V power

228 XTALO Clock output

229 XTALI Clock input

230 JITFO RF small signal output

231 JITFN RF small signal inverted amplification input

232 PLLVSS Phase lock loop earth

233 IDACEXLP

234 PLLVDD3 Phase lock loop3.3V power

235 LPFON Amplifier circuit filter output

236 LPFIP Amplifier circuit filter input

237 LPFIN Amplifier circuit filter input

238 LPFOP Amplifier circuit filter output

239 ADCVDD3 Analog/digital conversion 3.3V power

240 S_VCM

241 ADCVSS Analog/digital conversion earth

242 S_VREFP

243 S_VREFN

244 RFVDD3 RF 3.3V power

245 RFRPDC DC RF error signal input

246 RFRPAC AC RF error signal input

247 HRFZC Hi-frequency RF signal over-zero detection

248 CRTPLP

249 RFGND RF earth

250 CEQP

251 CEQN

252 OSP

253 OSN

254 RFGC

255 IREF Reference current

256 AVDD3 Analog 3.3V power

Page 23: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

2. BA5954

BA5954 is a servo-driven single-chip integrated circuit with a built-in 4-channel BTL-driven circuit. It can directly receive the PWM control signal output by digital servo IC. After internal filtering and drive amplification, it drives the executing components in the servo mechanism to complete the focus, tracking, feed and main axle drives. BA5954 uses 28-pin encapsulation. Notes: The 28 pins of BA5954 output a valid control signal, which is supplied by the 50 pins of MT1389. When this signal is high level, BA5954 output is valid; while when this signal is low level, BA5954 is not started and its output ends are closed.

BA5954 pins have the following functions:

Pin Name Function 1 VINFC Focus control signal input

2 CF1 External feedback circuit

3 CF2 External feedback circuit

4 VINSL+ Positive control input, reference voltage

5 VINSL- Main axle control signal input

6 VOSL External feedback resistor

7 VINFFC Focus feedback signal input

8 VCC 5V power

9 PVCC1 5V power

10 PGND Earth

11 VOSL- Main axle drive reverse voltage output

12 VO2+ Main axle drive positive voltage output

13 VOFC- Focus drive reverse voltage output

14 VOSC+ Focus drive positive voltage output

15 VOTK+ Tracking drive positive voltage output

16 VOTK- Tracking drive reverse voltage output

17 VOLD+ Feed drive Positive voltage output

18 VOLD- Feed drive reverse voltage output

19 PGND Earth

20 VINFTK Tracking feedback signal input

21 PVCC2 5V power

22 PREGND Earth

23 VINLD Feed control signal input

24 CTK2 External feedback circuit

25 CTK1 External feedback circuit

26 VINTK Tracking control signal input

27 BIAS 1.4VReference voltage input

28 STBY Enable control signal

Page 24: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

3. 29LV160BE

29LV160BE is a 16M bit FLASH memory. It uses the 0.23-um manufacturing process. It has16-bit data width DQ0-DQ15 and its capacity is 16M bits. Its working voltage is 3.3V. It uses the 48-pin TSOP encapsulation. Its working mode is shown in the following table:

DQ8~DQ15 Working Status CE OE WE RESET A0~A19 DQ0~QD7

BYTE: Hi Level BYTE: Low Level

Read L L H H Ain Dout Dout Hi resistance

Write L H L H Ain Din Din Hi resistance

Stand-by H × × H × Hi resistance Hi resistance Hi resistance

Output Disabled L H H H × Hi resistance Hi resistance Hi resistance

Resetting × × × L × Hi resistance Hi resistance Hi resistance

Functions of 29LV160BE pins are shown in the following table:

Pin Name Function

15 RY/BY Ready/System busy

1~9、16~25 、48 A0~A19 20-bit address bus

26 CE Chip enable

27、46 VSS Earth

28 OE Output enable

29~36、38~44 DQ0~DQ14 15-bit data bus

37 VCC 5V power

45 DQ15/A-1 Character expansion mode is data line; bit expansion mode is

address line

47 BYTE Select 8-bit or 16-bit output mode. 16-bit output for high

level and 8-bit output for low level.

11 WE Write enable

12 RESET Resetting, low level valid

10、13、14 NC Void pin

4. AE45164016

AE45164016 is a 4Banks×1M×16bit 64Mb CMOS synchronous DRAM. Its features ar e big capacity, high speed, etc. Its working voltage is 3.0V~3.6V. This memorizer uses 54-pin TSOP encapsulation.

Page 25: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

Pins of AE45164016 have the following functions:

Pin Name Function

1、14、27 VDD +3.3Vpower

2、4、5、7、8、10、11、 13、42、44、45、47、48、

50、51、53 DQ[0~15] 16-bit data bus

3、9、43、49 VDDQ +3.3V power

6、12、46、52 VSSQ Earth

28、41、54 VSS Earth

15 LDQM Data input/output shield signal

16 WE Write control signal

17 CAS Column address gating signal

18 RAS Row address gating signal

19 CS Chip selection signal

20 SD-BS0 Segment address 0 gating signal

21 SD-BS1 Segment address 1 gating signal

22~26、29~35 MA [0~11] 12-bit address bus

36、40 NC Void pin

37 CKE Clock enable signal

38 CLK System clock input

39 UDQM Data input/output shield signal

5. Functions of TAS5508 pins TAS5508 is a high-performance audio frequency signal processing IC launched by TI Co. It has an 8-track pulse width modulation function and has a complete protection function. It features low distortion and good dynamic characteristics. 1 VRA_PLL Supply PLL with a 1.8V reference

voltage

2 PLL_FLT_RET External filter circuit of PLL 3 PLL_FLTM Inverted input end of PLL

4 PLL_FLTP In-phase input end of PLL 5 AVSS Analog earth 6 AVSS Analog earth

7 VRD_PLL Supply PLL with a 1.8V reference voltage

8 AVSS_PLL Analog earth of PLL

9 AVDD_PLL PLL supplies a 3.3V voltage 10 VBGAP Supply a 1.2V reference voltage

11 RESET System resetting signal, low level valid 12 HP_SEL Microphone input/output selection

13 PDN Close voltage, low level valid

Page 26: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

14 MUTE Software control mute, low level valid 15 DVDD 3.3V digital supply pin

16 DVSS Digital grounding pin 17 VR_DPLL Supply PLL with a 1.8V reference

voltage

18 OSC_CAP Oscillating capacitor 19 XTL_OUT Crystal oscillator output pin

20 XTL_IN Crystal oscillator input pin 21 RESERVED Connected to digital earth

22 TBASE_SEL Connected to digital earth 23 RESERVED Connected to digital earth 24 SDA Data signal

25 SCL Clock signal 26 LRCLK Right/left track clock signal

27 SCLK Audio frequency clock signal 28 SDIN4 Audio frequency data input end

29 SDIN3 Audio frequency data input end 30 SDIN2 Audio frequency data input end

31 SDIN1 Audio frequency data input end 32 PSVC Control PWM signal output

33 VR_DIG Digital center reference voltage 1.8V 34 DVSS Digital earth

35 DVSS Digital earth 36 DVDD 3.3V digital supply voltage

37 BKND_ERR Logic-error control pin, low level valid 38 DVSS Digital earth 39 VALID Output PWM signal normal display, high

level valid

40 PWM_M_1 Pulse width modulation signal output 1 41 PWM_P_1 Pulse width modulation signal output 1

42 PWM_M_2 Pulse width modulation signal output 2 43 PWM_P_2 Pulse width modulation signal output 2

44 PWM_M_3 Pulse width modulation signal output 3 45 PWM_P_3 Pulse width modulation signal output 3

46 PWM_M_4 Pulse width modulation signal output 4 47 PWM_P_4 Pulse width modulation signal output 4 48 VR_PWM PWM core reference voltage 1.8V

49 PWM_M_7 Pulse width modulation signal output 7 50 PWM_P_7 Pulse width modulation signal output 7

51 PWM_M_8 Pulse width modulation signal output 8 52 PWM_P_8 Pulse width modulation signal output 8

53 DVSS_PWM Supply PWM signal with digital earth 54 DVDD_PWM Supply PWM signal with 3.3V voltage

Page 27: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

55 PWM_M_5 Pulse width modulation signal output 5 56 PWM_P_5 Pulse width modulation signal output 5

57 PWM_M_6 Pulse width modulation signal output 6 58 PWM_P_6 Pulse width modulation signal output 6

59 PWM_HPML Earphone output PWM left track 60 PWM_HPPL Earphone output PWM left track

61 PWM_HPMR Earphone output PWM right track 62 PWM_HPPR Earphone output PWM right track

63 MCLK 3.3V clock input 64 RESERVED Connected to digital earth 6. IC TAS5112 IC TAS5112 is a TI-produced high-performance audio frequency digital power amplifier IC. When bridge-connected to a 6-ohm load, each channel can output up to 50W. It has a 95DB dynamic range and low distortion. It has power efficiency up to 90%, low heat radiation, low-voltage protection, high-temperature protection, over-current protection, etc. In addition, it has a built-in drive power door adjustment circuit。Basic functions of its pins are as follows:

Pin Name Function Description

31 BST_A Auxiliary power 42 BST_B Auxiliary power

43 BST_C Auxiliary power 54 BST_D Auxiliary power 23 DGND Digital input/output reference earth

16 DREG Digital supply voltage adjustment pin

12 DREG_RTN Digital supply voltage adjustment circuit

25 DVDD Input/output reference pin 1,2,22,24,28,29,27,36,37,48,49,56

GND Grounding pin

3,26 GREG Door circuit drive voltage adjustment pin

30,55 GVDD Digital voltage adjustment pin

15 M1 (TST0) Mode selection pin 14 M2 Mode selection pin

13 M2 Mode selection pin 4 OTW Hi-temperature protection pin 34,35 OUT_A Output pin A 38,39 OUT_B Output pin B 46,47 OUT_C Output pin C 50,51 OUT_D Output pin D 32,33 PVDD_A Supply voltage of half-bridge A

40,41 PVDD_B Supply voltage of half-bridge B

Page 28: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

44,45 PVDD_C Supply voltage of half-bridge C 52,53 PVDD_D Supply voltage of half-bridge D

20 PWM_AM Inverted input end 21 PWM_AP In-phase input end

18 PWM_BM Inverted input end 17 PWM_BP In-phase input end

10 PWM_CM Inverted input end 11 PWM_CP In-phase input end

8 PWM_DM Inverted input end 7 PWM_DP In-phase input end

19 RESET_AB Resetting signal, low level valid 9 RESET_CD Resetting signal, low level valid

6 SD_AB Signal closed control 5 SD_CD Signal closed control 7. IC RC4558 IC RC4558 is a dual-channel low-noise amplifier IC. Compared with most amplifier ICs, it has a smaller noise, better output performance and wider power band. Its main features are small signal band, DC voltage gain up to 50000, AC voltage gain up to 2200 at 10KHZ, power band up to 140KHZ, wide supply range and very high conversion rate. Basic functions of its pins are as follows:

Pin Name Function Description

1 OUTPUT-A Output channel A 2 INVERTING INPUT-A Inverted input A

3 NON-INVERTING INPUT-A In-phase input A 4 V- Negative power supply

5 NON-INVERTING INPUT-B In-phase input B 6 INVERTING INPUT-B Inverted input B

7 OUTPUT-B Output B 8 V+ Positive power supply 8. CS 5340 CS 5340 is an A/D conversion IC. It can complete sampling, analog/digital conversion and has the filtering function. Under continuous input, its sampling frequency can reach 200KHZ/track. Its main features are as follows: 24-byte conversion; supporting all audio frequency sampling frequencies up to 192KHZ; under 5V supply, the dynamic range up to 101DB; high-conductivity filter for filtering DC, etc. Basic

Page 29: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

functions of its pins are as follows:

Pin Name Function Description 1 M0 Mode selection

16 M1 Mode selection 2 MCLK Main clock signal

3 VL Logic voltage supply 4 SDOUT Audio frequency data output 5,14 GND Grounding pin 6 VD Digital power

7 SCLK Continuous clock signal 8 LRCK Right/left clock signal 9 RST Resetting signal

10 AINL Analog input 12 AINR Analog input

11 VQ Static voltage 13 VA Analog power

15 FILT+ Reference voltage

Page 30: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6

A

B

C

D

E

F

654321

F

E

D

C

B

A

Inp

ut

sele

ctio

n

AUX(L/R)

Karaoke

TUNER(L/R)

Buff

erMIC

A/D

co

nve

rsio

n

L/R

RDS decoder Digital audio DSP

MCLK, LRCLK, DATA

DRIVE

OUT

BUFFER

Headphone signal

FR/FL/C

POWER AMP

POWER AMP

SURR/SW

PWM_FRPWM_FLPWM_C

PWM_SRPWM_SLPWM_SW

ENABLE

LPF*3

LPF*3

OUT

OUT

DECODER/SERVO

LPFOUT

Lt/Rt

VFD Driver

Key scan

VOL Knob

J1/J2

MUTE

DIGITAL IN Format cc

Video output AV/TV

SwitchSCART

SHUT

LOADER

DVD/POWER AMPLIFIER POWER

STANDBY REMOTE

STANDBY

DCK/DAT/CLK

KEY1

REMOTE

J1/J2

Y1~Y6

VSYNC

SDASCL

A,B

MCLKSCLK

LRCLK

SBCLK

PWM

_R/L-

PWM

_R/L+

SD

POWER BOARD

FRONT PANEL

AMP BOARD

IN-OUT PART

PROCESS

Tune

r pa

rt

Page 31: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6

A

B

C

D

E

F

654321

F

E

D

C

B

A

DK

1050S PAN

EL

CIR

CU

IT

SW1 1IR-IN2SDA 3SCL4Dout 5

Din 6Vss 7CLK 8STB 9

Key1 10Key2 11Key

312

Key

413

Vdd

14Se

g1/K

S115

Seg2

/KS2

16Se

g3/K

S317

Seg4

/KS4

18Se

g5/K

S519

Seg6

/KS6

20Se

g721

Seg8

22

Seg923

Seg1024

Seg1125

Seg12/Grid1126

Vee27

Seg13/Grid1028

Seg14/Grid929

Seg15/Grid830

Seg16/Grid731

Grid632

Grid533

Gri

d434

Gri

d335

Gri

d236

Gri

d137

Vdd

38

PWC

TL

39

LE

D3

40

LE

D2

41

LE

D1

42

Vss

43

OSC

44

N101TP6317

F11

F12

NP

3

P14

P25

P36

P47

P58

P69

P710

P811

P912

P10

13

P11

14

P12

15

P13

16

P14

17

P15

18

P16

19

NX

20

NX

21

NX

22

NX

23

NX

24

8G25

7G26

6G27

5G28

4G29

3G30

2G31

1G32

NP

33

F234

F235

DS101 HNV-08SS56

G1

G2

G3

G4

G5G6G7G8

G1

G2

G3

G4

G5

G6

G7

G8

123456

XP505

CON6

FL-FL+

Vee

DGND

STBY

C10447u/16V

R101100K

VD1011N4148

+5VVee

+5V

+5V

Vee

+5V123

RP101 RVP

R119 4.7K

R117 4.7K

C110102

C111102C106 47u/16V

R113 100R

R109 100R

R111 100R

R112 100R

C10547u/16V

R118 4.7K

R116 4.7K

R115 4.7K

C101104

OUT 1VS3

GND2

N102 REMOT

C103 104

1234567

XP601

CON7

R12547R

IR

STBSDA

CLK

J3J4

C107221

C108221

C109221

C102104

S111

S104

S110

S107 S108

S105 S106

VD1031N4148

VD1041N4148

VD1021N4148

S109

R104 10K

R103 10K

R102 10K

R107 10KR108 10K

R124150R

VD107 Blue LED

+5V

R121330R

V1012N5401

V1022N5401

R10610K

R105 10K

R123120R

R120330R

R122120R

VD105 LED-BK VD106 LED-BK

+5V

+5V+5V

+5V+5V

+5V

+5V

+5V

+5V

R110 100R

R11433K

+5V

C11210u/35V

R126 150RVD108

Blue LED

+5V

R127 10K +5V

HDET

S102 S103 S101 R100 10K

Page 32: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

1 2 3 4 5 6

1 2 3 4 5 6

A

B

C

D

E

F

A

B

C

D

E

F

DVDA2

CE

QP

250

DVDB3

DVDC4

DVDD5

AGND1

OSP

252

OSN

253

DVDRFIP6

DVDRFIN7

MA8

MB9

MC10

MD11

SA12

SB13

SC14

SD15

CDFON16

CDFOP17

TNI18

TPI19

MDI120

MDI221

LDO222

LDO123

AV

DD

325

6

V2REFO28 SGND27

VREFO30 V2029

TEO32 FEO31

USB_VSS43

RFLVL/RFON26 CSO/RFOP25

TEZISLV33

OP_OUT34

OP_INN35

OP_INP36

FOO42 TRO41

USBM45

TROPENPWM39

PWMOUT1/V_ADIN940

USB_VDD346

FMO38 DMO37

HIGHA059

HIG

HA

175

HIG

HA

274

HIG

HA

372

HIG

HA

471

HIG

HA

570

HIG

HA

669

HIG

HA

768

DVDD1852

AD

791

DVSS62

APLLCAP63

AD

587

AD

486

APLLVSS64

APL

LVD

D3

65

AD

384

AD

283

AD

182

AD

081

DV

DD

373

IOA

093

IOA253

IOA354

IOA455

IOA556

DV

DD

380

IOA657

IOA758

A16

67

A17

92

DV

SS85

IOA1860

IOA1961

IOA

2076

IOA

178

AL

E90

IOO

E79

IOW

R66

IOC

S77

DV

SS94

UW

R95

UR

D96

DV

DD

1897

UP1

_298

UP1

_399

UP1

_410

0

UP1

_510

1

UP1

_610

2

UP1

_710

3

UP3

_010

4

UP3

_110

5

DV

SS11

6

UP3

_410

6

UP3

_510

7

RFV

DD

324

4R

FRPD

C24

5

DV

DD

310

8

ICE

109

PRST

110

IR11

1

INT

011

2

DV

DD

1812

2

DQ

M0

113

DQ

S011

4

RD

711

5

RD

611

7

RD

511

8

RD

412

0D

VSS

119

RD

312

1

RD

212

3

RD

112

4

RD

012

5

RD

1512

6

RD

1412

8D

VD

D3

127

RD13129

YUV0/CIN 192

FS 191

VREF 190

DACVDDC 189

RD16 188

RD17 187

RD18 186

RD19 185

RD20 184

RD21 183

DVDD3 182

RD22 181

RD23 180

DQM2 179

DQM3 178

RD24 177

RD25 176

DVSS 175

RD26174

DVDD18 173

RD27172

RD28 171

RD29170

RD30 169

DVDD3 167RD31/ASDATA5168

RA4166

RA5 165

RA6164

DVSS 163

RA7162

DVSS 161

RA8160

RA9 159

RA11158

RCLK156CKE 157

DVDD3 155

RCLKB 154

RVREF/V_ADIN3 153

DVDD18 152

RA3 151

RA2 150

DVSS 148RA1 149

RA0 147

RA10 146

BA1 145

DVSS 144

BA0 143

DVDD3 141RCS 142

RAS 140

CAS 139

RWE 138

DQM1 137

DQS1 136

DVSS 134RD8 135

RD9133

RD10 132

RD11131

DR12 130

RFG

ND

249

IRE

F25

5

SVDD324

RFG

C25

4

JITF

N23

1

JITF

O23

0

LPFO

P23

8

LPFI

N23

7

CR

TPL

P24

8

HR

FZC

247

LPFI

P23

6

CE

QN

251

RFR

PAC

246

S_V

REF

N24

3

AD

CV

SS24

1S_

VR

EFP

242

S_V

CM

240

AD

CV

DD

323

9

PLL

VD

D3

234

LPFO

N23

5

PLLV

SS23

2

MC

_DA

TA

224

SPD

IF22

5

ASD

ATA

422

2

DV

DD

1822

1

ASD

ATA

322

0

ASD

ATA

221

9

RFG

ND

1822

6

ASD

ATA

121

8

ASD

ATA

021

7

AC

LK

215

AL

RC

K21

3A

BC

K21

4

DV

DD

320

4

SPB

CK

/ASD

ATA

521

1

SPLR

CK

210

SPD

AT

A20

9

SPM

CL

K20

8

DV

DD

321

2

HSY

NC

/V_A

DIN

220

7

YU

V7/

ASD

ATA

520

6

VSY

NC

/V_A

DIN

120

5

YU

V6/

R20

3

YU

V5/

B20

2

DA

CV

SSA

201

YU

V4/

G20

0

DA

CV

DD

A19

9

YU

V3/

CV

BS

198

DA

CV

SSB

197

YU

V2/

C19

6

DA

CV

DD

B19

5

YU

V1/

Y19

4

DA

CV

SSC

193

IDA

CE

XL

P23

3

USBP44

FG/V_ADIN847

TDI/V_ADIN448

TMS/V_ADIN549

TCK/V_ADIN650

TDO/V_ADIN751

AD

688

IOA

21/V

_AD

IN0

89

DV

SS21

6

DV

SS22

3

XT

AL

O22

8X

TA

LI

229

RFV

DD

1822

7

U201

MT1389

C201 1uF

C202 1uF

C203 1uF

C204 1uF

C205 DNSC206120p

C

B

A

DRFO

R201 0RR202 0RR203 0RR204 0R

CBAD

EF

MDI1MDI2

LDO2LDO1

RFOPRFON

V2P8V20V1P4

FEOTEOTEZISLVOPOOP-OP+

DMOFMOTROPEN

C207 104

R20

7

R20

6

R20

5

C209

C208

TROFOO

L201FB

89V33

USBVDDADINTROUTTRINSTBYTRCLOSEV18A2A3A4A5A6A7A8A18A19

C214104

C2151500pF

R2120R

R210 18KR211 20K

C213330pF

C212330pF

C211104

C210153pF

R209 15KR208 10KDMSO

FMSO

TRSOFOSO

V1P4

V1P4

ADIN

L202FB

89V33

PWR

#A

16A

15A

14A

13A

12A

11

A10

A9

A20

PCE

#A

1PR

D#

AD

0A

D1

AD

2A

D3

AD

4A

D5

AD

6A

21

AD

7A

17A

0

V18

VFD

CK

VFD

AT

VFD

STSC

LSD

A

RX

DT

XD

UR

ST#

IR DQ

M0

DQ

S0D

Q7

DQ

6D

Q5

DQ

4D

Q3

DQ

2D

Q1

DQ

0D

Q15

DQ

14 R213

1K

DQ9DQ10DQ11DQ12DQ13

DQ8

RAS#CAS#WE#DQM1LIMIT

CS#BA0

BA1DMA10

DMA0

DMA1DMA2DMA3

DMA9DMA11DCKEDCLK

DMA8

DMA7

DMA6DMA5DMA4

J4

RDSCEAUIN_SL0AUIN_SL1J3

RDSID

RDSSYNCPOWER_ON_RST

VDATA3RDS_DATACLK

DTS_DO

DTS_DIDTS_CE

VOICE_DETTUNER_ON

DTS_CL

R214510R

C216FS

89V33 V18

L203FBDACVDD3 DV33

C217104

TC20110uF/16V

Y1

DV33A

Y2

Y3

Y4

Y5

Y6

VSYNC#

HSYNC#

SPMCLK

SPD

AT

ASP

LR

CL

KR215 1K

AL

RC

KA

BC

KA

CL

K

R216 (DNS)R217 (DNS)R218 (DNS)R219 (DNS)

ASD

AT0

ASD

AT1

ASD

AT2

AM

UT

EV

18

R220(DNS)

ASP

DIF

RFV

18

XI

XO

JITF

OJI

TFN

C21

80.

47uFTC202

10uF/16V

PLL

VD

D3C21

90.

047u

F

C22

00.

047u

F

C22

11u

FA

DC

VD

D3

RFV

DD

3V

REF

NV

REF

P

C22220pFC223

1000pFR22

4

100K

C22

410

4

C22

50.

033u

F

C22

610

4

C22

710

4

C22

810

4

R22315K

C229104

V1P4

AVDD3

89V

33

C233 100pF

R227 750K

JITFNJITFO

L205FB

L206

4.7R

L207 FB

L208FB

L250FB

C234

104

C235104

C236104

C237104

RFV33

PLLVDD3

ADCVDD3

RFVDD3

RFSVDD3

C238104

C239104

C2401uF

VREFN VREFP

C243104

TC20447uF/16V

C242104

TC20547uF/16V

C241104

TC20647uF/16V

C250104

C251104

C252104

C244104

C245104

C246104

C247104

C249104

C248104

C253104

C254104

C256104

C257104

C258104

V18

L235FB

L236 FBAVDD3

DV33

234

1

56

8910

7

11121314

161718

15

1920

222324

21

XS301

24P0.5mm C312

104

L318 FBSMT

L316 FBSMT

L312 FBSMTL314 FBSMT

L311 FBSMTL310 FBSMT

L308 FBSMTL307 FBSMTL306

10uH

L305 FBSMTL304 FBSMT

L303 10uH

L319

FBSMT

L320 FBSMTL321 FBSMT

L322 FBSMT

L323 10UHL324 FBSMT

C301104

TC301220uF/16V

C311

104

AVCC

E

A

V3012SB1132-S

V3022SB1132-S

R30110R

R302

10R

TC30247uF/16V

TC30347uF/16V

LDO-AV33

LDO-AV33

LDO2

LDO1

R303 0R

L301 FBSMT

MDI1

F

L317 FBSMT

B

RFOIOADC

V20

R309

10K

R308

100KR311

10K

R310

100KV3032SK3018-S

V3042SK3018-S

V3053904-S

IOA

AVCC

L234FB

C230104

V18 RFV18

R31520K

R31

410

K

R316 20K

C306151

C305104

C302104

C303104TC304

47uF/16V

R3061R

R3071R

R312 20K

R3051R

R3041R

C304 151

VINFC 1CF1 2CF2 3VINSL+ 4

VINSL- 5VOSL 6VINFFC 7

GN

D30

VCC 8PVCC1 9PGND10VOSL- 11VO2+12VOFC- 13VOFC+14

VOTK+15

VOTK-16

VOLD+17

VOLD-18

PGND19

VNFTK20

PVCC221

GN

D29

PREGND22

VINLD23

CTK224

CTK125

VINTK26

BIAS27

STBY28

U302BA5954

TRSOV1P4STBY

SL+SL-

FMSO

MO_VCC

GND

MO_VCC

SP-SP+

V1P4

FOSO

DMSO

L302FB

VCC

R31310K

R325470R

R327470R

R321 1R

R320150K

R319150K

R322680K

R317 680K R318 0R

C307 2200pF

ADINOP-OP+

V1P4SP-

OPO

C308DNS

V3088050

V3078050

V3068550

V3098550

R323

1.5K

R3241.5K

R339

10K

R326

2.2R\1/4W

TC30847uF/16V

TC30947uF/16V

LOAD+LOAD-

VCC

TRCLOSE

V3109014-S

TROPEN

(TRCLOSE1) (TROPEN1)

(TRCLOSE1)

TROPEN

LOAD-LOAD+

C309104

SP+

SL+SL-LIMIT

L309FB DV33

R228 0R

TDITMSTCKTDO

R216410K

DV33

C231104TC211

220uF/16V

L238FB

DV33

R340 1R

C3102200pF

RFSVDD3

R331 0RDQS0

R297 0RR298 0RR299 0R

PWR#PCE#PRD#

DWR#DCE#DRD#

AD

C_D

AT

R2165 0R

R2166 0R

C2167104

C2174104

SCMUTE

C2175

104

TC247

47uF/16V DA

VN

INL

RSW

MU

TE

R261 33R

ADC_DAT

R26

8

33R SP

BC

LK

R2690R

AU

DIO

_RST

TC20347uF/16V

234

1

56

XS303

XS06

234

1

5

XS302

XS05

TROUT

TRIN

C343

104

C344

104

C345

104

C346

104

URST#

C277

104

TC24847uF/16V

R32810K

R32910K

DV33

USBPUSBM

DVR979 DECODER CIRCUIT 1

Page 33: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6

A

B

C

D

E

F

654321

F

E

D

C

B

A

1 2 3 4 5 6

1 2 3 4 5 6

A

B

C

D

E

F

A

B

C

D

E

F

L232 FBSMT

L230 FBSMTL231 FBSMT

R2304.7K

VFDSTVFDAT

VFDCK

234

1XS202

XS04(DNS)

DV33RXDTXDGND

C267104

TC21047uF/16V

C281104

C2162104

C2163104

SD33L226 FBDV33

C278225

TC21747uF/16V

VD2011N4148

R25275K

R25447K R256

33R

5 6

U205CHCU04

URST#

DV33

DC/NC1

RST_/NC2

WP/RST_3

VSS4

VCC 8

RST/WP 7

SCL 6

SDA 5

U202AT24C16X4050

SDASCL

C259104

DV33

R259680R

R260680R

C26347pF C264

47pF

C26547pF

J4

A619

A1717

RY/BY15

A1816

NC14

A124

NC10

NC13

A97

A151

A142

A133

A115

A106

A88

A199

WE11

RESET12

A520

A421

A322

A718

DQ8 30

DQ9 32

DQ10 34

DQ233

DQ335

DQ15/A-145

DQ1239

DQ11 36

DQ6 42

A16 48

BYTE47

Vss 46

DQ7 44

DQ1443

DQ1341

DQ5 40

DQ4 38

Vcc37

DQ029

OE 28

Vss 27

DQ131

A223

A124 CE 26

A0 25

U214 8M_FLASH(TSOP)

A15A14A13A12A11A10A9

A18

A7A6A5A4A3A2

A16

GNDA0AD7

AD6

AD5

AD4VD

AD3

AD2

AD1

AD0DRD#GNDDCE#A1

A8R2414.7K(DNS)

VP

R24

04.

7K

R23

94.

7KR

238

4.7K

VD

C279104

A17

A19

TC23747uF/16V

R255

0R

VD DV33

AA20

L204

FB(DNS)

VCC

R253

0R(DNS)

L233 FBSMT

C26647pF

J3

C260102(DNS)

C261102(DNS)

X201

27MHz

R246 100K

C27527pF

C27627pF

XI R244

0R

XOR248

0R

10 11

U205E

HCU04

ASPDIFIEC958

R2500R(DNS)

R251

0R

A023

A124

A225

A326

A429

A530

A631

A732

A833

A934

A10/AP22

A1135

BA0/A1320

BA1/A1221

CLK38

CKE37

/CS19

/RAS18

/CAS17

/WE16

DQML15

DQMH39

NC36

NC40

VSS54

VSS41

VSS28

DQ02

DQ1 4

DQ25

DQ3 7

DQ48

DQ5 10

DQ611

DQ7 13

DQ842

DQ9 44

DQ1045

DQ11 47

DQ1248

DQ13 50

DQ1451

DQ15 53

VCC 1

VCC 14

VCC 27

VCCQ 3

VCCQ 9

VCCQ 43

VCCQ 49

VSSQ 6

VSSQ 12

VSSQ 46

VSSQ 52

U211

SDRAM 64M

DMA0DMA1DMA2DMA3DMA4DMA5DMA6DMA7DMA8DMA9DMA10MA11BA0#BA1

SDCLKSDCKE

DCS#DRAS#DCAS#DWE#

DQM0DQM1

DQ0DQ1DQ2

DQ4DQ5DQ6DQ7DQ8DQ9DQ10DQ11DQ12DQ13DQ14DQ15

DQ3

SD33

SD33

R23133R

R23233R

DM

A11

BA

1

C2160104

L222 FB

L223 FB

C270

104

C271

104TC208220uF/16V

TC207220uF/16V

DV33

AVCC

VCC

C272104

TC213220uF/16V

L227FB

DV33A

IN1

GN

D2

OU

T3

U208BA033FP(DNS)

VCC DV33

L228

FB

VD2021N4004(DNS)

VD2031N4004(DNS)

IN3

GN

D1

OU

T2

U209LM1117MP-1.8

C273104

TC209220uF/16V

R2423.3K

R2431.2K

V18

DV33

AA21

R21

404.

7K

R25

70R

R25

80R

A21

A20

R264 33RR263 33R

R265 33RR266 33RR267 33RR2162 33R

DCLKDCKE

CS#RAS#CAS#WE#

DWR#

IR

C215827pF(DNS)

L2492.7uH(DNS)

C2168104

C2170104

C2171104

C2173104

L209 FB

R2159

0R

URST#

HSYNC#VSYNC#

R291 33RACLK SACLKR292 33RR293 33RR294 33RR295 33RR296 33R

ABCK SBCLKALRCK SLRCKASDAT0 SDATA0

SDATA1SDATA2

ASDAT1ASDAT2

Y1Y2

Y3

Y4Y5Y6VGND

234

1

5

XP203

XS05

VCC

VDATA3

IEC958 R233 75R

AUDIO_RSTSDATA0

GNDSACLKGNDSBCLKSLRCKAUIN_SL0AUIN_SL1SCLSDA

DTS_DODTS_CLDTS_DIDTS_CETUNER_ON

RDSSYNC

DAVNIN

RDSIDRDSCE

R249

4.7K

VCC

Q204

9015

DV33 C274

104

SDATA1SDATA2

SCMUTELRSWMUTE

R2344.7K

VCC

R2354.7K

GND

234

1

56

89

10

7

1112

141516

13

1718

202122

19

23242526

2827

XP207

XS28

VOICE_DET

CLK

POWER_ON_RST

12 13

147

U205FHCU04

R225 0R226(dns) 0ADC_DAT

123456789

101112

XP900

CON12

DV33USB_VBUS

USBMUSBP

DGNDSPDAT

SPLRCKSPBCK

INTDVCC

L251 FBVCC

R344 33RSPMCLK

R342 33RR343 33R

R341 33R

R345 33R

SPBCLKSPLRCLKSPDATA

SPMCKDGND

vout 1

vout 5GN

D2

ce4

vin3

U203RT9701

L216FB

VCC

R34710R(DNS)

DV33

R346

10R(DNS) R34810R(DNS)

USB_VBUS

C348

104

C349

225

C347104

AUDIO_RST

SCLSDA

OPT1

234

1

56

89

10

7

1112

141516

13

1718

202122

19

23242526

2827

XP206

XS28DV33XO

DGND

R236

1K

C282

104

DVR979 DECODER CIRCUIT 2

Page 34: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6

A

B

C

D

E

F

654321

F

E

D

C

B

A

IN-O

UT

PA

RT

CIR

CU

IT

L4

5

R6

XC104BAV4

L103 RH354708

L104 RH354708

L105 RH354708

VIDEO_C

L1

2

R3

XC103AAUX-IN

L4

5

R6

XC103BMIX-OUT

L102 RH354708

L100 RH354708

C102102

C103102

D+5V

VGND

R103 68R

1234567

XP401

CON7

AGND

AUXR

AUXL

R1

L1

1110

987654321

15141312

19181716

2120

XC107CS-111

SPDIF

Y1Y2

Y3

Y4Y5Y6

R10575R

C10647P

C10847P

L106 1.8uH

D+5VVGND VGND VGND VGND

Y1

R10675R

C10747P

C10947P

L107 1.8uH

D+5VVGND VGND VGND VGND

Y2

R10775R

C11047P

C11147P

L110 1.8uH

D+5VVGND VGND VGND VGND

Y3

R10875R

C11247P

C11447P

L111 1.8uH

D+5VVGND VGND VGND VGND

Y4

R10975R

C11347P

C11547P

L114 1.8uH

D+5VVGND VGND VGND VGND

Y5

R11075R

C11647P

C11747P

L116 1.8uH

D+5VVGND VGND VGND VGND

Y6

VIDEO_Y

VIDEO_C

V-COMP

VIDIO Y1

VIDIO U

VIDIO V

VGND

VGND

RO

LO

VY

VV

VU

VY

VV

VU

VDATA3

VSYNCHSYNC

A+9V

+9V

V1008050

R11433R

R1122.2K

VGND

VDATA3

V1018050

R1151K

R1132.2K

+9V

VGND

HSYNC

R11675R

V1028050

D+5V

VSYNC

VC

V-COMP

R104330R

R1114.7K

D+5V

C105224

L119 RH354708

L118 RH354708

L120 RH354708

1234567

XC105DASW-02

L1

2

R3

XC104AAV4

L122 RH354708

L121 RH354708

C118102

C119102

C183 20P

C184 20P

C185 20P

C186 20P

C120104

C188 20P

VGND

C187 20P

R126 220R

R127 100K

VGND

SPDIF

C10120P

C12220P

C12320P

C12420PC12520P

C12620P

C129104

Y(Green)

Cr/Pr(Red)

Cb/Pb(Blue)

VGND

VGND

VIDEO_Y

123456789

10111213141516171819202122232425262728

XS206

CON28

AGND

VIDIO Y1

VIDIO U

VIDIO V

V-COMP(Yellow)

GND1

VCC2

3

XC102AAVG-2 O

XC102BAVG-2 O

GND 1

VCC2

3

XC106AAVG-2 I

XC106BAVG-2 I

C104104

R1191.2K

C137104

C134104

C130104

C12810u/16V

C136472

R11810K

L101RH354708

D3.3V

D3.3V

SDA

1

AD

02

EMPH

3

RX

P04

RX

N0

5

VA6

AG7

FIL

T8

RST

9

RM

CK

10

RE

RR

11

RX

P112

RX

P213

RX

P314

RX

P415

OSC

LK

16O

LR

CK

17SD

OU

T18

INT

19

U20

OM

CK

21

DG 22

VD 23

H/S

24

RX

P525

RX

P626

AD

127

SCL

28

N101CS8415A

C135 104

C132104

C133104

R12575R

L109FB

C12710u/16V

D+5V

C131104

D+5V

D+5V

SDOUTOLRCKOSCLK

RMCKRSTINT

SCLSDA

D3.3VR

124

47

RR

123

47

R

R11

74

7R

R10

14

7R

R12

04

7R

R10

24

7R

R12

24

7R

+9V

R12

14

7R

OMCK

VD100MMBD4148SE

VD101MMBD4148SE

VD102MMBD4148SE

VD103MMBD4148SE

VD104MMBD4148SE

VD105MMBD4148SE

VC

Page 35: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6 7 8 9 10 11 12

A

B

C

D

121110987654321

D

C

B

A

C49104

C50103

C53103

C55104

C52104

C72104

C105104

C9515p

C9615p

3.3V

VALID

MUTE

DGND

MCLK

D+3.3V

SDASCL

SDA_AD

SCLKLRCK

S DD3.3V SD

VALID

P W M _ R R -P W M _ R R +

PWM_RL-PWM_RL+

P W M _ S W +

P W M _ S R -P W M _ S R +

PWM_SL-PWM_SL+

PWM_H_MLP W M _ H _ P LPWM_H_MRPWM_H_PR

AVSS

C99104

PWM_H_MRPWM_H_PR

PWM_H_MLPWM_H_PL

PWM_RL-PWM_RL+PWM_RR-PWM_RR+

PWM_SW+

PWM_SR-PWM_SR+

PWM_SL-PWM_SL+

A V S S

S D A _ A D

SCLKLRCK

MCLK

DGND

3.3V

A V D D

R S T

MUTE

3.3V

C51104

S D A

C5410u/16V

SCL

PWM_3.3V

D V D D

R5410K

R5510K

R5710K

R6010K

R6110K

R96 47R97 47R98 47R99 47R100 47R101 47

R64200

Y 113.5M

3.3V

C56104

C5810u/16V

R70 47

R66200

R67 3.3

R1041M

R65 1

C48104

SDA_SLSRSDA_LR

SDA_CSW

RST

L8 FB

R68 2.2

3.3V

C109104

C110

10u/16V

R113

1

3.3V

C111224

C11210u/16V

R115 22

R58(DNS) 5.1K

R94 47R95 47

C22104

R27 51

C23105

PGND

C27104

PGND

PGND

C28 104

C29 104

R34 1.5

R36 1.5

C32 333

C33 333

PGND

PGND

PGND

L4 10uH

L1 10uH

VCC28A

+28.5V

C36680u/35V

PGND

C38102

C40103

R403.3

R2410

C24104

PGND

C430.47u

C900.47u

C44103

C93103

R521

R931

PGND

C25105

PGND

R25 10

S R -

R31 1

R32 1

R452K

R902K

PGND

C178103

R1821

R18122K

PGND PGND

R18020K

+28.5V

C182103

R1871

R18422K

PGND PGND

R18320K

+28.5V

C176470u/35V

C177470u/35V

C180470u/35V

R383K

R395.1K

+28.5V

R443K

R475.1K

+28.5V

PGND

SL-FR-

C170103

R1741

R17322K

PGND PGND

R17220K

+28.5V

C174103

R1781

R17722K

PGND PGND

+28.5V

C168470u/35V

C169470u/35V

C172470u/35V

C173470u/35V

S D

VALID

FL-

P W M _ S R +

PWM_SL+

PWM_SL-

VALID

SD

PWM_SL+

PWM_SL-

PWM_SR+

PWM_SR-

C181470u/35V

R17620K

SL-

S R -

R18847/0.5W

+28.5V

R19010

R18910

VC

C28A

VC

C28BR167 10K

R168 10K

R16310K

R16410K

R159 10K

V-4

1 IN-2

1 IN+3

2 IN-6

2 IN+5

1 OUT 1

2 OUT 7

+V 8

N11RC4580 HGNDC167 330u/10V

C166 330u/10V

HGND

+6.8V

HGND

C157471

C163 221

C16147p

C158471

C16247p

C164 221

HGNDHGND

H-L

H-R

R17010K

R17110K

C106104

LGND

C108 10u/16V

LO

R11447K

LGND

+6.8V

C107104

LGND

C165 10u/16V

RO

R16947K

LGND

+6.8V

C8

10u/16V

GNDMIC1

MIC2

+9V

-9V

3

21

84

N1A4558

R12.2K

R22.2K

5

67

N1B4558

C110u/16V

C210u/16V

C6 101

R4 51K

SD

C114104

R12251

C115 105

PGND

C119104

PGND

PGNDVCC28B

R17510

C116104

PGND

C175105

PGND

R11610VALID

VALID

DVSS16DVDD15/MUTE14 /PDA

13 /HP_SEL12 /RESET11

VBGAP10AVDD_PLL9 AVSS_PLL

8 VRD_PLL7 AVSS_GR6

AVSS5PLL_FLTP4PLL_FLTM3 PLL_FLT_RET

2 VRA_PLL1

RE

SER

VE

D64

MC

LK

63

PWM

_HPP

R62

PWM

_HPM

R61

PWM

_HPP

L60

PWM

_HPM

L59

PWM

_P_6

58

PWM

_M_6

57

PWM

_P_5

56

PWM

_M_5

55

DV

DD

_PW

M54

DV

SS_P

WM

53

PWM

_P_8

52

PWM

_M_8

51

PWM

_P_7

50

PWM

_M_7

49

VR_PWM48

PWM_P_447

PWM_M_4 46

PWM_P_3 45

PWM_M_3 44

PWM_P_2 43

PWM_M_242

PWM_P_141

PWM_M_1 40

VALID 39

DVSS 38

/BKND_ERR37

DVDD36

DVSS 35

DVSS 34

VR_DIG 33

VR

_DPL

L17

OSD

_CA

P18

XT

L_O

UT

19

XTL

_IN

20

RE

SER

VE

D21

RE

SEV

RE

D22

RE

SER

VE

D23

SDA

24

SCL

25

LR

CK

26

SCLK

27

SDIN

428

SDIN

329

SDIN

230

SDIN

131

PSV

C32

O

N12TAS5508PAG

C67104

C1134.7u/16V

GND1

GND2

GREG3

/OTW4

/SD_CD5

/SD_AB6

PWM_DP7

PWM_DM8

/RESET_CD9

PWM_CM10

PWM_CP11

DREG_RTN12

M313

M214

M115

DREG16

PVDD_B41BST_B 42

BST_C 43PVDD_C 44PVDD_C

45OUT_C46OUT_C47GND 48

GND 49OUT_D 50OUT_D

51PVDD_D52PVDD_D 53

BST_D 54GVDD 55

GND 56

PWM_BP17

PWM_BM18

/RESET_AB19

PWM_AM20

PWM_AP21

GND22

DGND23

GND24

DVDD25

GREG26

GND27

GND28

GND29GVDD30BST_A 31

PVDD_A 32PVDD_A 33OUT_A

34OUT_A35GND 36

GND 37OUT_B 38OUT_B 39PVDD_B

40

N13TAS5112DFD

5

6

XC100C

WP12

7

8

XC100D

WP12

123

XS114

CON3

GND1

GND2

GREG3

/OTW4

/SD_CD5

/SD_AB6

PWM_DP7

PWM_DM8

/RESET_CD9

PWM_CM10

PWM_CP11

DREG_RTN12

M313

M214

M115

DREG16 PVDD_B 41BST_B 42BST_C

43PVDD_C44PVDD_C 45

OUT_C 46OUT_C 47GND

48GND49OUT_D50OUT_D 51

PVDD_D 52PVDD_D 53BST_D

54GVDD55GND 56

PWM_BP17

PWM_BM18

/RESET_AB19

PWM_AM20

PWM_AP21

GND22

DGND23

GND24

DVDD25

GREG26

GND27

GND28 GND 29GVDD 30BST_A

31PVDD_A32PVDD_A33OUT_A 34

OUT_A 35GND 36GND

37OUT_B38OUT_B 39

PVDD_B 40

N14TAS5112DFD

S R O U T

S L O U T

R199

0R

R200 0RR201 0R

HGND LGNDGNDPGND GND

P W M _ S R -

PWM_FR-PWM_FR+

PWM_FL-PWM_FL+ PWM_FR-

PWM_FR+

PWM_FL-PWM_FL+

PGND

C120 104

C121 104

R134 1.5

R136 1.5

C129 333

C130 333

PGND

PGND

PGND

C179104

PGND

VCC28A

R132 1

R131 1

C1390.47u

C1400.1u

C1410.1u

C143103

C142103

R1441

R1451

PGND

L9 10uH

L10 10uH

+28.5V

C133680u/35V

PGND

C135102

C137103

R1403.3

R14210K

R14310K

S W +

S W - 9

10

XC100E

WP12

C123 104

C122104

R186 1.5

R135 1.5

C183 333

C131 333

PGND

PGND

L11 10uH

+28.5V

C134680u/35V

PGND

C136102

C138103

R1413.3

C1840.47u

C188103

R1971

PGND

R1851

R130 1

R1922K

R1913K

R1955.1K

+28.5V

PGND

C E N - 3

4

XC100B

WP12

C E N +

PGND

C47103

R531

PGND

PGND

C30 104

C31 104

R35 1.5

R37 1.5

C34 333

C35 333

PGND

PGND

PGND

C26104

PGND

L3 10uH

L2 10uH

+28.5V

PGND

VCC28B

C39102

C41103

R413.3

R30 1

R33 1 C46103

R511

PGND

C450.47u

PGND

R492K

R483K

R505.1K

+28.5V

FLOUT

FROUT

C420.47u

R432K

R423K

R465.1K

+28.5V

FL-

FR-

1

2

XC100A

WP12

11

12

XC100F

WP12

PGND

PWM_SW-

PWM_SW+ P W M _ S W +

P W M _ S W -

PWM_CEN-

PWM_CEN+

P W M _ C E N -

P W M _ C E N +

PWM_FL+

PWM_FL-

PWM_FR+

PWM_FR-

PWM_FL+

PWM_FL-

PWM_FR+

PWM_FR-

R2020R

R2030R

R2040R

R2050R

R2060R

R2070R

R2080R

R2090R

R2100R

R2110R

R2120R

R2130R

C187103

R1961

R19422K

PGND PGND

R19320K

+28.5V

C185470u/35V

C186470u/35V

P W M _ C E N +P W M _ S W -

P W M _ C E N - PWM_CEN+PWM_SW-

PWM_CEN-

C37680u/35V

C E N -

PGND PGND

PGND

S D

3.3V

+28.5V

PGND

+28.5V

PGND

P G N D

A U X L

A U X R

TU_L

TU_R

AUIN_SL0

AUIN_SL1R764.7K

R774.7KA+5V

C74104

R814.7K

C76101

C77101

C75104

R78 4.7K

R79 4.7K

1

MIC(1)

0

TUNER(3)

0

1 AUX(2)1

1

0

AUIN_SL1 OUTPUT0

AUIN_SL0

R834.7K

O K

A G N DA U X R

A U X L

RO

LO

+9V

FR

OM

MA

IN B

OA

RD

R S T

SDA_LR

S D A _ S L S R

S D A _ C S W

SCLK

LRCKAUIN_SL0AUIN_SL1

DTS DODTS CLDTS DIDTS CETUNER_OND A V N I N

MUTE

H M U T

SCLS D A

硬件复位信号

M1

M0

R8410K

R8510K

R8610K

TU+5V

D A V N I NS D ASCL

SDASCL

C117561

Y 24.332MHzC11815p

C12415p

C81331

RDS_MPX

R8910

R13710

C1254.7u/16V

C126104

C127104

C12847u/16V

R91220/0.5W

VD35.1V

R9210K

V 5S8550

C9447u/16V

+9V

D T S _ C E 1DTS_DI1DTS_CL1DTS_DO1

RDS_MPXA G N D

R123 220R124 220R125 220R126 220

C88104

C85220u/16V

L5 FBTU+9V

R121 10KR120 10KR119 10KR117 10K

TU+5V

TU+5V3.3V

R138 4.7K

R1394.7K

R1331K

LO

RO

HDET

MCLK

SCLKLRCK

S D A _ A DL6FB

C844.7u/16V

C874.7u/16V

R87 10K

C78104 C79

47u/16VC83104

C8610u/16V

L7FB

3.3V

M01

MCLK2

VL3

SDA4

GND5

VD6

SCLK7

LRCK8

RST9AINL 10

VQ 11AINR 12VA

13RGND14FILT+ 15

M1 16N7 CS5340

R885.1

C82104

R S T

C914.7u/16V

C924.7u/16VC80104

R802.2K

R822.2K

SDA_SLSR

SDA_LR

SDA_CSW

LRCK

SCLK

RST

SDA_ADMUTE

D+3.3V

-9VHGND

+9V

A G N DA+5V

C89102

V 69014

1234

XS101

CON4

1234567

XP112

CON8

123456789

10111213141516171819202122232425262728

XS108

CON28

12345678

XS104CON8

A G N D

H D E T

MRO1

MPTH2

TCON3

OSCO4

OSC15

VSSD 6

VDDD 7DAVN8

SDA9

SCL10

PSWN11

MAD 12

AFIN13

VDDA 14

VSSA15

MPXIN16

Vref 17

SCOUT18

CIN19

LVIN20

N6 SAA6588

N4A74HCT125

N4B74HCT125

N4C74HCT125

N4D74HCT125

N3A74HCT125

N3B74HCT125

N3C74HCT125

N3D74HCT125

3 4

N2BSN74LVC2G04DBVR

1 6

N2ASN74LVC2G04DBVR

Y 312.288MHz C1815p

C1715p

R8 1M

R2947

R5647

R5947

R6347

R6947

R6247

X012

X114

X215

X311

Y01

Y15

Y22

Y34

INH6

A10

B9

VEE 7

X 13

Y3

VDD 16

VSS8

N5

CD4052

A+5V

A+5V

-9V

C61 104

C57 47u/16V

A+5V

R222 10K

R221 10K

3.3V

3.3V

R217 1K

R218 1K

R219

10K

V 42N5551

R220

10KR72

10K C62

10u/16V

C66103

C71103

C65103

C64103

C68103

C69103

C70103

3.3V

R224 0R

R223 0R

3.3V

C59 104

C19 47u/16V

C20 102C60

104C21

102

C6347u/16V

+6.8V

LGND

C19010u/16V

C18910u/16V

C73221

C171221

-9V

+9V

HGND

SDA_LRS D A _ S L S R

S D A _ C S W

R22547

3.3V VDD

GND

VCC

C9

104

C11

104

C13

104

C12

104

C10

104

C191101

C192101

C193101

C194101

C195101

C196101

R1034.7K

R1024.7K

R10727K

R10627K

R108 27K

R10927K

C97681

C98681

C102 101

C100101

LGND

LGND

R1054.7K

R1564.7K

R15727K

R15827K

R161 27K

R16227K

C154681

C155681

C101 101

C156101

C159102

LGND

LGND

R165 22K

C160105

R166 10K

+6.8V

LGND

PWM_RR+

PWM_RR-

PWM_RL+

PWM_RL-

LGND

3

21

N8ATLV272

5

67

N8BTLV272

3

21

N9ATLV272

5

67

N9BTLV272

R1412K

C1482p

R15 220K

LGND

+6.8V

LGND R1722K

C197105

R16 10K

R1812K

C13282p

R19 220K

C198102

LGND

LGND

C103104

R1104.7K

C10410u/16V

R1114.7K

+6.8V

LGND LGND LGND

R201K

R214.7K

VD51N4148

VD61N4148

C200104

C199104

+9V

-9V

R226100R

VD1 1N4148

R2304.7K

L12FB

东莞市步步高视听电子有限公司

BBK第 张 共 张 版次:

设 计

更 改

审 核

数 量

标 准 化

更改单号 签 名

批 准

日 期

1-Jun-2005 李林存

DVR979功放板电原理图

VD71N4148

R31K

3.3V

VD85.6V

+9V

VD91N4004

VD101N4004

1234567891011

XS113

CON11

TU+9V

DTS_DO1DTS_CL1DTS_DI1

TU_R

TU_L

DGND

H-RH-L

D T S _ C E 1

L13 100uH

R1981K/3W

PGND

RO1

RO1

LO1

LO1

C15322U/16V

HMUT

HGND

R15410K

+6.8V

C201104

R5 47

C202104

C203104

C204104

H-R

H-L

D+3.3V

L14 100uH

VD126.8V

R24147/0.25W

R242

270

C14847U/16V

V22N5551

C149

47U/16V

C150104

+6.8V

R16047K

HGND

3.3V

H D E T

C205

10u/16V

C206

10u/16V

R245

100

R243

4.7K

R2441K

V7 5401

V98050

V88050

LGND

LGND

LINE_MM

U1

R94.7K

+6.8V

MU1

Page 36: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process

1 2 3 4 5 6

A

B

C

D

E

F

654321

F

E

D

C

B

A

C520104/50V

L505

10uH/1A

C521104/50V

L506

10uH/1A

L507

10uH/2A

XC501 104X2

31

42

L501SE198920mH

H-GND

H-GND

TC518470uF/50V

R5224.7K

R5203K

R5191.8K

R50375R

U502HS817/PC817

TC

501

330u

F/4

00V

H-GND

C501103/1KV

FL-FL+

CPU5V

DGND

C517 101/50V

C513 101/50V

C518 101/50V

C515 101/50V

C502101/1KV

H-GND

TC5071000uF/16V

TC513220uF/16V

TC514220uF/35V

TC5101000uF/16V

TC5092200uF/16V

TC5112200uF/16V

TC5121000uF/16V

C510 101/50V

TC5062200uF/16V

H-GND

R501

680K/1W

A+5V

DCVPP

U505HS817/PC817

H-GND

R511

47R

R51047K/2W

C527102/50V

C526

104/50V

C505103/1KV

C504104/50V

H-GND

C523101/50V

L50

8

10uH

/5A

TC5162200uF/50V

TC5031uF/50V

H-GND

R53024K

C506473/50V

12

XS100~220V

TC508470uF/16V

DGNDD+5V

D+3V3

D+5V

D+3V3

AGNDA+5V

1234

XS101

P+28VPGNDPGND

P+28V

FL+

FL-

-21V

A+5V

R521220R

R516

1R/1W

YC503102Y1

P +28V

C512473/50V

C511473/50V

R526

33R/1W

PHGNDA-10VAGND

A+10V

C516473/50V

C514473/50V

H-GND

C524101/50V

R527

33R/1W

TC5172200uF/50V

!

!

!

!

!

!

!

!

!

!

C525473/50V

R50847K/2W

R50968K/2W

DV

R979/939 P

OW

ER

CIR

CU

IT

FL+FL-

CPU5V

A+5V

A+10V

D+5V

D+3V3

A+5V

P +28VP +28V

A-10V

DGND

AGND

AGND

DGND

PHGND

12345

XS105

CPU5V

R53210K

R5331.5K

L504

10uH/1A

R513

22K

C507

101/50V

A K

G

Q501MCR100-6

CPU5V

R514

1.2K

C508104/50V

STBY

TC505

47uF/50V

C509473/50V

!

R515

10K

D506

HER105

D513HER105

D502HER107

D505HER207

D517BYW29E200

D516BYW29E200

D507

HER105

D509SR560

D510SR560

D511SR560

D512HER105

D5141N4148

D515SR160

D5081N4148

D5181N4148

D503

HER105

R5181K

C519104/50V

R517150R

F50

1T

3.15

A/2

50V

U506TL431

R5281K/3W

SYN

C5

FB4

VC

C3

GN

D2

DR

AIN

1

U504KAIM0880BTU

2

3

4

6

79

13

12

10

11

1415

16T501

BCK-28-0598

2

3

4

6

810

13

11

14

T502BCK-40-0244

RT501

NTC103

RV50107D471

R505 300R

A+10V

R525330R/1W

TC515470uF/25V

C522473/50V

ZD502C9V1

A-10V

123456

XS102

12345678

XS104

-21V

STBY

-21V

STBY

H-LH-R

H-LH-R

31

42

L502SE1989 20mH

XC502 104X2

YC501102Y1

YC502102Y1

EGND

AC2

V+

1

AC 3

V-

4

BD501KBL04

!

!

!

!

1234

XS103

PHGNDH-L

H-R

H-L

H-RPHGND

ON

/OFF

ON/OFF

U507HS817/PC817

H-GND

R523

330RCPU5V

R524

10KSTBY

TC50247uF/50V

ZD501C5V1

R50275K/2W

R5292.2K

TC50447uF/50V

R531

47K

V5032N5551

H-DET H-DET

H-DETH-DET

U503TL431

ADJ1

FB2

CS3 Vcc 6

DRV5

HV 8

NC 7

GND4

U501

NCP1200D

D501HER107

V501IRFBC20D504

HER105

R5071R/1W

H-GND

L503FB RH357508

R50430K

H-GND

R506 1.5K

R534

0R47/1W

R535

0R47/1W

DCVPP

AGND

DGND

C503102/50V

R5364.3K

R5373K

R538

10R/2W TC520470uF/16V

C528473/50V

R539

10R/2W

V5042N5551

V5022N5551

H-GND

R512

750K/0.5W R5403K

H-GND

!

Vin1

Vout3

GND2

U508LM7805

Page 37: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process
Page 38: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process
Page 39: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process
Page 40: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process
Page 41: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process
Page 42: Principle and Maintenance of DK1050S · 2020. 4. 2. · 2. Principle of circuit l Chapter Five Working principle of panel control 1. Working principle Typical trouble shooting process