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SERVICE MANUAL
LED TV
ChassisMSD3393
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
WARNING
55D3550Model No.
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1-1. Table of Contents
1. General Information...........................................................................1-1. Table of Contents
1-3. Important Notice
1
Chapter 1: General Information
1
31-2. General Guidelines
1-4. How to Read this Service Manual
3
6
....................................................................................
Service Manual Model No.:
- 01 -
3. Location of Controls and Components...........................................
3-1. Board Location
3-2. Main Board & AV Board
3-3. Power board
4. Disassemble and Assemble..........................................................
4-1 Remove the Pedestal
6
88
8
8
11
14
14
4-2 Remove the Back Cover 14
4-3 Remove the Adhesive Tape 14
4-4 Remove the Main Board 15
4-5 Remove the Speaker 15
4-6 Remove the Remote Control Board 16
5. Installation Instructions.......................... 17
5-1 External Equipment Connections 17
5-2 HDMI Connections 21
6. Operation Instructions............................ 24
6-1 Front Panel Controls
6-2 Back Panel Controls
6-3 Universal Remote Control
23
24
25
7. Electrical Parts........................................ 26
7-1. Circuit Diagram
7-2. Wiring Connection Diagram
26
31
3-4. LCD Panel 13
4-6 Remove the Power board 16
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Service Manual Model No.:
- 02 -
9. Trouble-shooting.............................................................. 38
9-1. Simple Check 38
9-2. Main Board Failure Check
9-3. Panel Failure
39
46
8-1. How to enter into the factory model
8-2. How to update software
35
36
8. Measurements and Adjustments.................................... 32
8-3. How to enter into the Hotel Model 37
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1-2. General Guidelines
When servicing, observe the original lead dress. If a short circuit is found, replace all parts
which have been overheated or damaged by the short circuit.
After servicing, see to it that all the protective devices such as insulation barriers, insulationpapers shields are properly installed.
After servicing, make the following leakage current checks to prevent the customer from
being exposed to shock hazards.
1) Leakage Current Cold Check
2) Leakage Current Hot Check
3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive
1-3. Important Notice
1-3-1. Follow the regulations and warningsMost important thing is to list up the potential hazard or risk for the service personnel to
open the units and disassemble the units. For example, we need to describe properly
how to avoid the possibility to get electrical shock from the live power supply or charged
electrical parts (even the power is off).
This symbol indicates that high voltage is present inside.It is dangerous to
make any king of contact with any inside part of this product.
This symbol indicates that there are important operating and maintenance
instructions in the literture accompanying the appliance.
1-3-2. Be careful to the electrical shock
to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,
1-3-3. Electro static discharge (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. The following
techniques should be used to help reduce the incidence of component damage caused by
electros static discharge (ESD).
1-3-4. About lead free solder (PbF)This product is manufactured using lead-free solder as a part of a movement within the
consumer products industry at large to be environmentally responsible. Lead-free solder
must be used in the servicing and repairing of this product.
Special parts which have purposes of fire retardant (resistors), high-quality sound
(capacitors), low noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture's specified parts
shown in the parts list.
Safety Component
Service Manual Model No.:
- 03 -
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1-3-6 Safety Check after Repairment
- 04 -
Service Manual Model No.:
in the original positions, or whether there are the positions which are deteriorated around
the serviced places serviced or not. Check the insulation between the antenna terminal or
external metal and the AC cord plug blades. And be sure the safety of that.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power source before;
a. Removing or reinstalling any component, circuit board module or any other receiver
assembly.
b. Disconnecting or reconnecting any receiver electrical plug or other electrical
connection.
c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic
capacitors may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate high voltage meter or othervoltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage
probe.
Do not test high voltage by "drawing an arc".
5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this
service manual might be equipped.
CAUTION: eiver.
3. Do not spray chemicals on or near this receiver or any of its assemblies.
4. Unless specified otherwise in this service manual, clean electrical contacts only by
applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or
comparable non-abrasive applicator; 10% (by volume) Acetone and 90% (by volume)
isopropyl alcohol (90%-99% strength).
CAUTION:
Capacitors may result in an explosion hazard.
6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless
all solid-state device heat sinks are correctly installed.
7. Always connect the test receiver ground lead to the receiver chassis ground before
connecting the test receiver positive lead.
Always remove the test receiver ground lead last. Capacitors may result in an explosionhazard.
9. Remove the antenna terminal on TV and turn on the TV.
10. Insulation resistance between the cord plug terminals and the eternal exposure metal
should be more than Mohm by using the 500V insulation resistance meter.
11. If the insulation resistance is less than M ohm, the inspection repair should be required.
If you have not the 500V insulation resistance meter, use a Tester. External exposuremetal: Antenna terminal Headphone jack
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Service Manual Model No.:
- 05 -
Electrostatically Sensitive (ES) Devices
1-3-7. Ordering Spare Parts
1. Immediately before handling any semiconductor component or semiconductor-
equipped assembly, drain off any electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commercially available discharging wrist
strap device, which should be removed to prevent potential shock reasons prior to applying
power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly
on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
to damage ES devices.
7. Immediately before removing the protective material from the leads of a replacement
ES device, touch the protective material to the chassis or circuit assembly into which the
device will be installed.
CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other
safety precautions.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
Some semiconductor (solid-state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive (ES) Devices.
Examples of typical ES devices are integrated circuits and some field-effect transistors
and semiconductor "chip" components. The following techniques should be used to help
reduce the ncidence of component damage caused by static by static electricity.
4. Use only an anti-static type solder removal device. Some solder removal devices not
6. Do not remove a replacement ES device from its protective package until immediately
before you are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive material).
8. Minimize bodily motions when handling unpackaged replacement ES devices.
(Otherwise harmless motion such as the brushing together of your clothes fabric or the
an ES device.)
Please include the following informations when you order parts. (Particularly the Version
letter)
1. Model number, Serial number and Software Version
The model number and Serial number can be found on the back of each product and the
Software Version can be found at the Spare Parts List.
2. Spare Part No. and Description
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- 06 -
Service Manual Model No.:
1-3-8. Photo used in this manual
The illustration and photos used in this Manual may not base on the final design of
products, which may differ from your products in some way.
1-4. How to Read this Service Manual
Using Icons:
each icon is described in the table below:
Note:
A note provides information that is not indispensable, but may nevertheless be valuable
to the reader, such as tips and tricks.
Caution:
A caution is used when there is danger that the reader, through incorrect manipulation,
may damage equipment, loose data, get an unexpected result or has to restart(part of) a
procedure.
Warning:
A warning is used when there is danger of personal injury.
Reference:
A reference guides the reader to other places in this binder or in this manual, where he/
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Service Manual Model No.:
- 07 -
Model 55D3550Screen Size 55 inch
Aspect Ratio 16:9
Resolution 1920*1080
Response Time (ms)8.5 (GRAY TO
GRAY)
Angel ofView 176o
Color Display 16.7M
No. ofPreset Channels
OSD Language English
Color System NTSC
Audio System DK, BG, I, M, L, L'
Audio Output Power
(Built-in) (W)
10W2
Audio Output Power
(outer) (W)No
Total Power Input (W) 135W
Voltage Range (V)
Power Frequency (Hz) 50~60Hz
Net Weight (KG) 14.8
Gross Weight (KG) 16.7
Net Dimension (MM) 1250*72*740mm
Packaged Dimension
(MM)1250*280*773mm
AC 100-240V
Cable :1-135Air: 2-69 (ATV&DTV)
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- 08 -
Service Manual Model No.:
3. Location of Controls and Components
3-1 Board Location
No. Description
3-2 Main Board
A Board
A Board Mainboard
B Board Power Supply
B Board
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Service Manual Model No.:
- 09 -
3-2-1 Function Description:
Main Board
Process signal which incept fromexterior equipment then translate into signal that panel
can display.
Main board connectorPower connectors (J 16)
Pin number Signal name
1 GND
2
3
4 +5V
5 POWER ON/OFF
6 +5VSTB
7 +5V
8 +5V
9 GND
10 GND
11 GND
12 +12V
13 +12V
Notes:
J 16-Pin 3: Backlight on/off:
The systemcan turn on or turn off the backlight ofTFT LCD Panel through the power
supply unit path.
J 16-Pin 6: Systempower on / standby
Systemboard will use this pin to control systempower.
J 16-Pin 2: Control the luminance ofbacklight
The systemcan generate the PWN signal to control the strength ofTFT LCD Panels
backlight through this connector
BL-ON/OFFBRIGHT
J16
BL-ADJUST
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- 10 -
Service Manual Model No.:
Keypad and remote connector (J 2)
Speaker connector (J 17)
Pin number Signal name Description
1 RSPK+ RSPK+
2 RSPK- RSPK-
3 LSPK- LSPK-
4 LSPK+ LSPK+
Pin number Signal name Description
1
LED_R LAMP RED
2
LED_G LAMP GREEN
3
4
IR REMOTE CONTROL
5
GND GND6
5V POWER FOR REMOTE
7
KEY1
KEY0
10
GND
8
9
NC
STANDBY
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3-3. Power Board
3-3-1 Function Description:Supply power for Main board, Panel.
Service Manual Model No.:
- 11 -
CON4
Pin number Signal name
1GND2
GND3
4 +5V
5 POWER ON/OFF
6 +5VSTB
7 +5V
8 +5V
9 GND
10 GND11 GND
12 +12V
13 +12V
NC
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3-4. LED Panel
- 12 -
Service Manual Model No.:
MTC550BLU-A02F(AUO:T550HVN01.9)
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Service Manual Model No.:
- 13 -
3-4-1.Connector de finition
PIN Symbol Description PIN Symbol Description
1 N.C.
No connection (for AUO test only. Do not
connect) 26 3D_EN
3D Function Enable
High(3.3V) : 3DOpen/Low(GND) : 2D
2 SCLAUO Internal Use Only
(SCL - EEPROM Serial Clock)27 N.C.
No connection (for AUO test only. Do not
connect)
3 SDAAUO Internal Use Only
(SDA - EEPROM Serial Data)28 CH2_0- LVDS Channel 2, Signal 0-
4 WP
AUO Internal Use Only
(EEPROM Write Protection
Low(GND) for Writable,
High(3.3V) / NC for Protection
29 CH2_0+ LVDS Channel 2, Signal 0+
5 N.C.No connection (for AUO test only. Do not
connect)30 CH2_1- LVDS Channel 2, Signal 1-
6 N.C.No connection (for AUO test only. Do not
connect)31 CH2_1+ LVDS Channel 2, Signal 1+
7 SELLVDSOpen/High(3.3V) for NS, Low(GND) for
JEIDA32 CH2_2- LVDS Channel 2, Signal 2-
8 N.C.No connection (for AUO test only. Do not
connect)33 CH2_2+ LVDS Channel 2, Signal 2+
9 N.C.No connection (for AUO test only. Do not
connect)34 GND Ground
10 PWM_1 YDIO_OUT 35 CH2_CLK- LVDS Channel 2, Clock -
11 GND Ground 36 CH2_CLK+ LVDS Channel 2, Clock +
12 CH1_0- LVDS Channel 1, Signal 0- 37 GND Ground
13 CH1_0+ LVDS Channel 1, Signal 0+ 38 CH2_3- LVDS Channel 2, Signal 3-
14 CH1_1- LVDS Channel 1, Signal 1- 39 CH2_3+ LVDS Channel 2, Signal 3+
15 CH1_1+ LVDS Channel 1, Signal 1+ 40 N.C.No connection (for AUO test only. Do not
connect)
16 CH1_2- LVDS Channel 1, Signal 2- 41 N.C.No connection (for AUO test only. Do not
connect)
17 CH1_2+ LVDS Channel 1, Signal 2+ 42 N.C.No connection (for AUO test only. Do not
connect)
18 GND Ground 43 N.C.No connection (for AUO test only. Do not
connect)
19 CH1_CLK LVDS Channel 1, Clock - 44 GND Ground
-
20CH1_CLK
+LVDS Channel 1, Clock + 45 GND Ground
21 GND Ground 46 GND Ground
22 CH1_3- LVDS Channel 1, Signal 3- 47 N.C.No connection (for AUO test only. Do not
connect)
23 CH1_3+ LVDS Channel 1, Signal 3+ 48 VDD Power Supply, +12V DC Regulated
24 N.C.No connection (for AUO test only. Do not
connect)49 VDD Power Supply, +12V DC Regulated
25 N.C.No connection (for AUO test only. Do not
connect)50 VDD Power Supply, +12V DC Regulated
51 VDD Power Supply, +12V DC Regulated
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4. Disassemble and assemble
Remove the adhesive tape indicated on the
faces upward
4-2Remove the Back Cover
unit.
Service Manual Model No.:
- 14 -
4-1 Remove the Pedestal
4-3. Remove the adhesive tape
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4-4 Remove the Main board
Service Manual Model No.:
- 15 -
J1 J2 J16 J17
4-5 Remove the speaker
Take out the speaker
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4-6 Remove the remote control
take out the remote controlboard
Service Manual Model No.:
- 16 -
4-7 Remove the Power Supply
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5. Installation Instructions
5-1 External Equipment Connections
Accessories
Remote Control User GUIDE Battery
Antenna Connection
Connect one end of a coaxial cable (not included) to the ANT IN jack on the back of
your TV/DVD combo, then connect the other end of the cable into the antenna or cable
TV wall outlet.
To improve picture quality from an antenna in a poor signal area, install a signal
If you need to split the antenna signal to connect two TVs, install a two-way splitter.
Service Manual Model No.:
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5-2 HDMI Connections
When the source device(DVD player or Set Top Box) supports HDM
How To Connect
1. Connect the source device to HDMI port of this TV with an HDMI cable(not supplied
with this product).
2. No separated audio connection is necessary.
How To Use
If the source device supports Auto HDMI function, the output resolution of the source
device will be automaticallyset to 1280x720p.
If the source device does not support Auto HDMI, you need to set the output resolution
appropriately.
To get the best picture quality, adjust the output resolution of the source device to
1280x720p.
Select HDMI input source in input source option of Select Main source menu.
When the source device(DVD player or Set Top Box) supports DVIHow To Connect
1. Connect the source device to HDMI port of this TV with a HDMI-to-DVI cable(not
supplied with this product).
2. A separated audio connection is necessary.
3. If the source device has an analog audio output connector, connect the source device
audio output to DVI Audio In port located on the PC port.
How To UseIf the source device supports Auto DVI function, the output resolution of the source device
will be automatically
set to 1280x720p.
If the source device does not support Auto DVI, you need to set the output resolution
appropriately.
To get the best picture quality, adjust the output resolution of the source device to
1280x720p.
Press the INPUT button to select HDMI input source in input source option of Select Main
source menu.
Installation
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Cable sample
HDMI Cable(not supplied with the product)
HDMI to DVI Cable
( not supplied with the product)
Analog Audio Cable
(Stereo to RCA type)
(not supplied with the product)
Service Manual Model No.:
- 22 -
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Power source
TO USE AC POWER SOURCEUse the AC polarized line cord provided for operation on AC.
Insert the AC cord plug into a standard polarized AC outlet.
NOTES:
Use the attached power cord only.
electrician replace the obsolete outlet.
simply unplug the unit from the AC outlet and plug it back in. The unit should return to
normal operation.
Service Manual Model No.:
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S e r v i c e M a n u a l
Model No.:
6. Operation InstructionsBasal information
- 24 -
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6-3 Setting Up Your Remote Control
Service Manual Model No.:
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5
4
33
22
11
D
D
C
C
B
B
A
A
Title
Size
DocumentNumber
Rev
Date:
Sheet
of
MSAV3216-K6
A
BLOCKDIAGRAM
ShenZhenMTC
Co.,Ltd.
31-32FXINGHESHIJIBLDG.3069CAITIANROAD
FUTIAN
DISTRICTSHENZHEN
Custom
2
12
Monday,January07,2013
Title
Size
DocumentNumber
Rev
Date:
Sheet
of
MSAV3216-K6
A
BLOCKDIAGRAM
ShenZhenMTC
Co.,Ltd.
31-32FXINGHESHIJIBLDG.3069CAITIANROAD
FUTIAN
DISTRICTSHENZHEN
Custom
2
12
Monday,January07,2013
Title
Size
DocumentNumber
Rev
Date:
Sheet
of
MSAV3216-K6
A
BLOCKDIAGRAM
ShenZhenMTC
Co.,Ltd.
31-32FXINGHESHIJIBLDG.3069CAITIANROAD
FUTIAN
DISTRICTSHENZHEN
Custom
2
12
Monday,January07,2013
VGA
AUDI
O
LINEIN_L0/R0
EUA211
3
UD
3
3.3V
_T
UNER
AL0O/
AR0O
L/R
1.8VA
DC/D
C
3.3VA
MSD
3393-12
8PIN
DSP
A
C100V-24
0V
SPIDF
OUTP
UT
COAXIAL
P
OWER
BOARD
TDA1
827
3
(ONB
OARD
)
RF
IN
FRONT
PANEL
SY
8008B
+1
2V
SPI
FLA
SH
SY
8008B
1.1
5V
DC/D
C
VGA
RGB
USB
PORT
HDMI*
3
IR,KEY0,KEY1
IF
AT
SC
TUNER
3.3V
_T
UNER
BL
OCK
DIA
GRAM
DVD_CVBS
CN2
02
AV
32M
bi
t
DC/D
C
SY
8008B
UD
9
UD
8UD7
U1
5V
STB
12VA
+3.3V
s
tb
UD1
3
PWR-
ON
/OFF
3.3
VA
5VA
AUDI
O
AMP
.
CVBS0
L/R
(AIN
0)
J8
PH1~
3
YPbPr
PH1~
3
PH1~
3
LINEIN
_L1
/R1
YP
bPr
0
CVB
S1
J3
J1
3
HeadPh
on
e
TO
SPK
J17
JA
CK
J1
8
5VA
PANEL
_ON
/OFF
PANEL
_P
OWER
OR
601
UD12
130MS
1.15V
3.3V
600S
600S
1.8V
19ms
U7
02
AUDI
O
AMP
.
Service Manual Model No.:
7. Electrical parts
7-1. C ircuit D iagram
- 26 -
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55
44
33
22
11
D
D
C
C
B
B
A
A
TU_SCL
TU_SDA
IF-IN+
IF-IN-
RFIN
TUNER_SDA
IF_AGC0
TUNER_SCL
IF-IN-
DIF_P_F0
DIF_N_F0
IF-IN+
IF_AGC0
TU_SDA
IF-IN+
TU_SCL
IF-IN-
+3.3V_Normal
3.3V_TUNER
3.3V_TUNER
3.3V_TUNER
3.3V
_TUNER
3.3V_TUNER
3.3V_TUNER
3.3V_TUNE
R
3.3V_TUNE
R
3.3V_TUNER
3.3V_TUNER
3.3V_TUNER
IFAGC-T
TUNER_SCL
TUNER_SDA
DIF_P
DIF_N
Title
Size
DocumentNumber
Rev
Date:
Sheet
of
TUNER
1.0
MSD3393
Custom
7
9
Thursday,January17,2013
Title
Size
DocumentNumber
Rev
Date:
Sheet
of
TUNER
1.0
MSD3393
Custom
7
9
Thursday,January17,2013
Title
Size
DocumentNumber
Rev
Date:
Sheet
of
TUNER
1.0
MSD3393
Custom
7
9
Thursday,January17,2013
Sili
conT
un
er
1827
3
Tun
er
I2
C
Sili
conT
un
er
332mA
MAX:360MA
sili
con
tun
er
Gen
er
al
Vcc
decouplin
g
Each
of
th
ese
Vcc
pin
s
of
TDA1
827
3
is
decoupl
ed
by
a
sin
gl
e
capaci
tor
(pin
1,
16,
27
,
35)
CD135
120pF
CD135
120pF
CD144
2.7nF
CD144
2.7nF
R150
NC/68R
R150
NC/68R
RD162
22R
RD162
22R
CD153
33pF
CD153
33pF
CD152
33pF
CD152
33pF
RD161
22R
RD161
22R
CD146
20pF
CD146
20pF
CD148
0.047uF
CD148
0.047uF
C253
1uF
C253
1uF
CD132
220nF
CD132
220nF
UD
13
TDA18273
UD
13
TDA18273
GNDSYNT18
VTUN19
CP20
XTOUT1
21
XTOUT2
22
CAPREGVCO17
IFP
25
GNDIF
26
V_IF_AGC
28
VCCIF
27
IRQ
30
V_Sync
29
GNDDIG3
23
IFn
24
VHFSupply 31
VHFL 32
VCCRF
1
RFin
2
NC
3
NC
4
GNDDIG0
5
AS_XTSel
6
GNDDIG1
7
Test1
8
Test2
9
GNDDIG2
10
SCL11
Test113
Xtal14
SDA12
Xtalnot15
VCCSYN16
CapRFAGC 40
RFAGC_Sense 39
UHFH 38
UHFSupply 37
UHFL 36
VCCRF Filter 35
VHFH 34
VHFSens 33
test11 41
CD149
0.1uF
CD149
0.1uF
UD12
NC/ST18WM-4A-E()-MXL601
UD12
NC/ST18WM-4A-E()-MXL601
ANT1
SCL3
SDA4
GPIO16
IF_N7
IF_P8
GND5
GND
10
GND
13
3.3V2
IF_AGC9
GND
11
GND
12
R167
NC
R167
NC
C144
10uF
C144
10uF
C149
NC/33pF
C149
NC/33pF
DD6
NC/BAV99W
DD6
NC/BAV99W
LD30
100nH_150mA
LD30
100nH_150mA
C140
0.1uF
C140
0.1uF
C148
NC/6.8nF
C148
NC/6.8nF
R149
NC/4.7K
R149
NC/4.7K
C143
NC/100pF
C143
NC/100pF
LD32
330nH 140mA
LD32
330nH 140mA
C138
0.1uF
C138
0.1uF
R145
0R
R145
0R
UD11
RFIN
UD11
RFIN
12
34
5
CD145
220nF
CD145
220nF
CD134
120pF
CD134
120pF
CD147
0.047uF
CD147
0.047uF
CD141
100nF
CD141
100nF
RD160
430R
RD160
430R
CD133
100nF
CD133
100nF
CD140
10PF
CD140
10PF
CD143
20pF
CD143
20pF
LD28
8.2nH_110mA
LD28
8.2nH_110mA
LD29
2.4nH_220mA
LD29
2.4nH_220mA
YD1
16MHz
YD1
16MHz
CD142
6.8nF
CD142
6.8nF
R151
NC/68R
R151
NC/68R
CD163
1nF
CD163
1nF
LD27
2.2nH 1000mA
LD27
2.2nH 1000mA
CD139
1uF
CD139
1uF
+EC12
220uF/16V
+EC12
220uF/16V
CD137
150pF
CD137
150pF
CD138
6.8nF
CD138
6.8nF
C150
NC/33pF
C150
NC/33pF
CD136
82pF
CD136
82pF
RD159
1k
RD159
1k
C160
0.1uF
C160
0.1uF
R154
1KR154
1K
C145
NC/100pF
C145
NC/100pF
R144
0R
R144
0R
RD158
0RRD158
0R
C137
0.1uF
C137
0.1uF
LD31
220nH 120mA
LD31
220nH 120mA
R147
NC/1.5K
R147
NC/1.5K
R148
NC/4.7K
R148
NC/4.7K
- 30 -
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Service Manual Model No.:
7-2 .Wiring Connection Diagram
- 31 -
1
2
4
3
NO.N ame
1
2
3
4 Connection Wire(For Remote and Keyboard)
Connection Wire(For Speaker)
LVDSWire
Connection Wire(Power For Mainboard)
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8. Measurements and Adjustments
Service ManualModel No.:
- 32 -
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- 33 -
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- 34 -
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- 35 -
8.1 How to enter into the factory model1. You can press "source-2-5-8-0" to go into factory setting. Presse the key "exit"
to shut the factory setting.
content:
1: ADC setup: set ADC value of YUV,VGA. It can also be auto-set. Adopt 100%
color bar to yuv and Checkerboard signal to vga.
2:Adjust the brightness and contrast ratio of each signal, which do not affect the
value of user's menu.
3: adjust the color temperature and white balance of each signal source.
4: SSC to adjust the spectrum for passing the EMC test.
5:special set
1)2hour off-- for Aging test
2)WDT --watch dog
3)white pattern --set pure color output for the panel, used at the checking and
aging test for panel.
4)reset
5)set the recorder
6)set power-on screen display.
6:QMAP adjust :adjust color quality.
7:PEQset sound EQ
8:sw information: to check the sofeware information
9:UART DEBUG : Access to serial port and connect a computer if set to HK.10:BMTEST :cpu check the CPU
The last line is SW Ver.No
Service Manual Model No.:
8.1 How to enter into the factory model8.1 How to enter into the factory model
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Service Manual Model No.:
- 38-
2.2,then input USB , press "MENU" and choose "update software", and then press "OK".
2.3,Nowyou should choose "Yes",TVbegin to update.You should reset TVafter update.
Note: When Upgrade on the process, please dont Power-Off!
Haier MSD3393 F/W upgrade with USB SOP
Step 1: Ready for F/W Upgrade
1.1 Prepare aUSB memory .
it fromcomputers USB port!
Step 2: F/W Upgrade
2.1AC ON
8.2 Howto update software
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Service Manual Model No.:
8.3 Howto enter into the hotel model
1. You can press "source-1-0-0-1" to go into the hotel model. Presse the key "exit"
to shut the hotel model.
Content:
1.Hotel Mode:
2.Panel Key Lock:
3.Max Volume:
4.Start Source:
5.Start Channel:
6.Start Menu Display:
7.Input Source Change:
8.Save to USB:
9.Loaking:
10.Volume Default
Hotel mode switchPanel key lock
Hotel mode can adjust the maximum volume
Hotel mode locking TV signal source
Hotel mode locking program channelsHotel Mode menu is displayed
Hotel mode is to display the Source
U disk data will be cloned into the machine
TV related equipment will be copied to the system, U disk ,
to other machines used for cloning
- 37 -
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Service Manual Model No.:
9. Trouble shooting
9-1. Simple check
- 38 -
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Cha
ngePanel
Stillh
aving
prob
lems
avesound
Checkifthereis+12Vat
Pin35inCN204
No R
eplace
the
Q101
Y
es
Checkifthereisaboat
+3VatPIN2,PIN3of
CN102
Y
es
NoR
epla
cethemainboard.
ChangeLVDS
wire
ServiceManual
ModelNo.:
Nopicturebut
h
9-2.
Mainboardfailurecheck
-39-
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CheckifthereisinputatC738C739
CheckifthereisoutputatPin1
Pin2
Pin3Pin4ofCN807
No
No
Yes
Yes
Nosoundbuthavepicture
ChangeM
ainboard
Stillhavingproblems
Checkifthereis
soundinputsig
nal
No
Checktheinputsource
Yes
Checkifthereisinput
atPin3Pin12ofU705
Checkifthereissigna
latL203andL205
No
checkthesignalinput
circuitofL203
,L205
Yes
ChangeU
705
No
Checkthe
speakers
ServiceMan
ual
ModelNo.:
check
thesignalinput
circuit
ofC738,C739
andE
C807,EC812
No
Yes
Checkifthereis+12VatPin15andPin28ofU70
5
ChangeFB1
ChangeL707
L708
L709L710
-4
0
-
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Yes
ChangeMainboard
NosoundNopicture
Change
Mainboa
rd
No
Yes
Change
U1
No-4
1
-
Checkifthereisvoltage
pressureinthe
CN101.
pin7/pin85V
pin12/pin1312V
Checkifthevoltage
pressureofCN101
Pin5ishigh
voltagepressure(Morethan2.5V)
Checkifthevoltagepressureof
L101(1.3V),L102(1.8V),
L103(3.3V),
Yes
ChangeU101,U102orU105
No
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NosoundNo
pictureNolight
Checkifthepowercord
iscorrectlyconnected
Yes
No
Connectthe
powercordtothe
socket
Checkifthereisvoltage
pressureinpin6ofCN
101(5V),
Replace
Remote
Yes
ReplacethePowerboa
rd
Stillhaving
problems
Change
Mainboard
C
heckifL1011.3V
L
1021.8VL103
3
.3VD1012.5Vis
w
orking
No
Cha
ng
U1
Yes
ChangU101orU102orU105
orD10
1
No -
42-
other:
can'tcontrol
Co
ntrolBoardor
ke
yboard.
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Poorsound
Verifyifsoundsystemis
correct.
Poor
sound
Changesound
system
No
Updatethesoftwareand
makethereboo
t;
orchangethe
Mainboard
Stillhaving
problems
Foreaseofus
e,recommendthatcustomerformatthepictureandsound
settingsinthe
automaticoption.
-43
-
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Nocolorforsome
channelp
rogram(
blac
Verifyifth
esame
probleme
xistsin
otherchannels
checkout
ofpicture
andsoundsystem
Refertorelative
instruction
sinthe
Manualfo
rcoloradjust
No
No
Yes
Yes
Checkoutofpictureandsound
systemo
fthischan
nel
Changethechanneltotheright
soundsystem(
PAL-M
/N
NTSC-M)
Nocolorforsomechannelprogram
(blackandwhite)
Stillhaving
problems
Updata
thesoftwareand
maket
hereboot;
orchangethemaiboard
-4
4
-
k
andwhite
)
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Checkifthepowercord
connectwe
ll?
Poweronandcheckif
5Vstandby
onthe
Powerboardexists?
Checkifthereishigh
level(2.5V-5.0V)at
Pin5inCN101.
No N
o
Yes
Yes
Replace
U1
Howtok
nowwhetherthePower
boardisbroken?
Stillhaving
problem
s
CheckifMainboard/LVDSwire/Panelare
ingood
condition?
No
Reconnectthepowercordwith
theoutlettoPower
board.
Yes
No
Checkifthebreakinthepower
circuit R
eplacethePo
werboard.
-45
-
Checkifthereis5V
atpin7/pin8,and12Vat
Pin12/pin13
inCN101.
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Mainboardn
otwork
1.checkifthepowersupplyhave12
Vand5Voutput.
2.VerifyiftheDC
/DCconvertorsha
vetherightoutput
(5V,3.3V,2.5V,1.8V
,1.32V).
3.VerifyiftheMainchip(MSD3391DS),DDR2,AudioAM
Psolderwell;
4.VerifyiftheFLASH(U17)hasthe
rightsoftwareand
workwell;
5.VerifyiftheY1(Crystal)hastherightfrequency
Panelnotw
ork
1.checkifthevoltageinputandoutputofblacklightpowerisworking
normally.
2.VerifyiftheMainboardoutputtherightOn/Offsignaltopowerboard.
3.VerifyiftheMainboardoutputthe
LVDSsingaltopan
elT-conboard.
4.Verifyifthesoftwareistherightversionofthismode
l.
5.ChangetheLVDSwiretocheckif
itsbroken.
-
46
-
3
.Otherprob
lem
Powerboar
dnotwork
1.Verifyifthepowercordconnectwe
ll?
2.checkifthepow
ersupplyifworkingnormally;checkifthepowersupply
of
+5Vstandbyisw
orkingnormally;
3.checkifthePO
WERON/OFFvoltageishighpressure;
4.checkifthepow
ersupplyhave+1
2V/+5Voutput;
5.CheckifMainboard/LVDSwire/Panelareingoodcondition?
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Service Manual Model No.:
- 46 -
9-3. Pannel failureFailure Mode
Part Name Description Phenomena Failure cause
TCP
V B/D Vertical bar
Block Defect :TCP cracking or cracking
Dim or L/D :TCP Sunken
:TCP lead cracking
:ACF bonding short
:Awful environment and
something electric enter
into LCD
:Mis-align between TCP and
Panel
:Panel failure
:TCP failure
V Dim Vertal gray line
V L/D
Vertical color
line(light or darkforever)
H B/D Horizontal bar
H DimHorizontal gary
line
H L/D
H o r i z o n t a l
line(light or dark
forever)
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Service Manual Model No.:
Part Name Description Phenomena Failure cause
Panel or
Polarlzer
Dot DefectBright dot dark dot in
pannel
I n c o m i n g I n s p e c t i o n
Standard
Polarizer Bubble Bladder in Polarizer
Bladder between Polarizer
and top glass
Polarizer Scratch Polarizer Scratch
Tine or rigidity arose
F / M i n s i d e
Polarizer
Eyewinker ins ide
Polarizer
Eyewinker inside Polarizer
Circuit
Abnormal Display Abnormal Display1.Chip lose action
2.IC ahort or jointiog bad
3.Pannel and vsc connect
bad
FlashingB r i g h t a n d d a r k
display alternately
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Service Manual Model No.:
- 48 -
Failure Mode
Part Name Description Phenomena Failure cause
Circuit
White Screen B/L normal,
only white screen
display
Maybe caused
by surge current
and EDSBlack Screen B/L normal,
only Black screen
display
FIIcker CrosstalkLCD
Vcom imbalance
Abnormal Color Only
color abormalCapacitance
improper bring
crosstalk inside
LCD pannel
Abnormal Color
Only
color abnormal 1.Chiplose action
2 . I C s h o r t o r
jointion bad
3.Pannel and vsc
connect bad
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Failure Mode
Part Name Description Phenomena Failure cause
Mechanlcal
Nolse
When
turn panel,appearcacophony
Caused
by Mechan icanoise of backlight
unit
Ripple Connectric circle Causeed by
between
mechanism and
pannel
B/L off B/L lose action *Connect
badness
between wire and
electrode
B/L dark B/L br ightness
darker than
normal
*Connect
badnessShor t
between wire and
electrode
B/L
wire damaged
B/L
wire damaged
Operation
abnormal
or systemic noise
B/L wire open Without backlight Operation
abnormal
or systemic noise
B/L shut down B/L shutdown in
sometime
Shor t b i tween
lamp housing and
wire, Because
consume power
too much
F/M F/M
inB/L ,white,balck
Rotundityor wirelike
F/M in B/L unit
Service Manual Model No.:
- 49 -
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Service Manual Model No.:
- 50 -
Failure Mode
Part Name Description Phenomena Failure cause
Mechanlcal or B/
L
Light leakage
Brightnessat bottom of LCM
brighter
than normal
B/L unit badness
Uniformity
B/L brightness
asymmetric
Sheet in B/L unit
is uneven
Mount hole
Lack screw
or screw damage
*Lack screw
Screw damage
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Sincere Forever
Haier GroupHaier Industrial Park, No.1, Haier Road
266101, Qingdao, China
http://www.haier.com
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