LG Flatron W2243T service manual

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E-mail: http://www.LGEservice.com/techsup.html

MODEL:

W2243T (W2243T-PFT.A**NAPH forLGD TLA1, W2243T-PFT.A**VAPH for AUO V0)

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

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COLOR MONITOR SERVICE MANUAL

CONTENTSSPECIFICATIONS ...................................................2 PRECAUTIONS .......................................................3 TIMING CHART .......................................................7 DISASSEMBLY ........................................................9 BLOCK DIAGRAM...................................................12 DISCRIPTION OF BLOCK DIAGRAM .................. 14 ADJUSTMENT ...................................................... 16 SERVICE MODE ......................................................... 18 TROUBLESHOOTING GUIDE .............................. 19 WIRING DIAGRAM ................................................... 25 EXPLODED VIEW...................................................... 26 REPLACEMENT PARTS LIST ................................. 28 DIFFERENT PARTS LIST......................................... 37 SCHEMATIC DIAGRAM.............................................. 38

SPECIFICATIONS1. LCD CHARACTERISTICS Type: matrix-TFT Color LCD Module Active Display Area: 21.53 inches Pixel Pitch: 0.248 (H) x 0.248 (V)mm Color Depth: 16.7M colors Size: 495.6(W) x 292.2(H) x 16.35(D) mm(Typ.) Display Mode: LTN Mode, Normally White Surface Treatment: Anti-Glare, 3H Electrical Interface: Dual channel LVDS 2. OPTICAL CHARACTERISTICS 2-1. Viewing Angle by Contrast Ratio > 10 4. Max. Resolution D-sub Analog: VESA 1920 x 1080 @ 60 Hz

Left: 150min, 170(Typ) Right: 150min, 170(Typ) Top: 140 min, 160(Typ) Bottom: 140min,160(Typ) 2-2. White Luminance ( Center ): 300Cd / m2 (Typ) 2-3. Contrast Ratio: 600(min), 1000(Typ) 3. SIGNAL (Refer to the Timing Chart)

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3-1. Sync Signal Type: Separate Sync, SOG (Sync On Green) / Digital 3-2. Video Input Signal 1) Type: R, G, B Analog, Digital 2) Voltage Level: 0~0.7 Vp-p 3) Input impedance: 75 3-3. Operating Frequency Horizontal: 30 ~ 83kHz Vertical: 56 ~ 75Hz

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w. wj6. ENVIRONMENT

6-1. Operating Temperature: 10C~35C Humidity: 10 % to 80 % non-Condensing 6-2. Storage Temperature: -20C to 60 C Humidity: 5 % to 90 % non-Condensing 6-3. MTBF: 70000 Hours (Not include panel) Lamp Life: 50000 Khrs 7. DIMENSIONS (with Stand) Width: 51.64 cm (20.33 inches) Depth: 19.80 cm (7.80 inches) Height: 39.61 cm (15.59 inches) 8. WEIGHT (excl. packing) Weight: 3.8 kg (8.38 lbs)

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5-2. Power Consumption On Mode: 40 W(Typ.) Sleep Mode: 1 W Off Mode: 1 W

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5-1. Power: AC 100-240V~ 50/60Hz 1.0A

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5. POWER SUPPLY

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TIMING CHART

Front Mode Section Polarity CLOCK [kHz]/[Hz] [MHz] H(Pixels) 1 V(Lines) H(Pixels) 2 V(Lines) H(Pixels) 3 V(Lines) H(Pixels) 4 V(Lines) H(Pixels) 5 V(Lines) H(Pixels) 6 V(Lines) 7 V(Lines) H(Pixels) 8 V(Lines) H(Pixels) 9 V(Lines) 78.75 75.029 -7800 768 1 3 28 768 +/65.0 60.0 60.123 806 1312 768 1024 3 16 6 96 29 176 768 1024 x + + 25.175 28.321 + 25.175 70.09 31.469 800 449 Period(E)

nec. h (C) 96 2 108 2 96 2 64 3 128 4 80 3 64 3 136 (D) 16 37 18 12 16 10 16 1 40 1 16 1 32 1 24

Frequency

Total

Display (A)

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DOT

Syn

Back

Resolution

Porch (B) 48 60 54 35 48 33 120 16 88 23 160 21 224 39 160

el.640 350 720 400 640 480 640 480 800 600 800 600 832 624 1024

640 x 350 720 X 400 640 x 480 640 x 480 800 x 600 800 x 600 832 x 624 1024 x

31.468 70.08

ww59.94 37.5 75 37.879 60.317 46.875 75.0 49.725 74.55 48.363

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H(Pixels)

w. wj900 449 800 525 840 500 1056 628 1056 625 1152 667 1344

DOT Frequency Mode Section Polarity CLOCK [kHz]/[Hz] [MHz] H(Pixels) 10 V(Lines) H(Pixels) 11 V(Lines) H(Pixels) 12 V(Lines) H(Pixels) 13 V(Lines) H(Pixels) 14 V(Lines) H(Pixels) 15 V(Lines) H(Pixels) 16 V(Lines) H(Pixels) 17 V(Lines) + + + + + 105.982 146.250 + + 119.00 + + 135.0 75.035 64.674 59.883 1066 +/+ 108.0 +/+/92.978 65.96 63.981 60.02 79.976 937 1688 1066 1688 900 1280 1024 2 48 1 4 112 3 31 248 38 900 1280 x 1024 1280 x 1024 1680 x 1050 1680 x 1050 1280 x 1024 1920 x 1080 +/100.0 75.062 61.805 915 1504 870 1152 3 18 3 134 39 200 870 1152 x 68.681 1456 1152 Period(E) (A) (D) 32 (C) 128 (B) 144 1152 x Total Display Porch . Porch ution Front Sync Back Resol-

1280 1024

ne16 1 144 3 48 3 104 3 48 1 88 4 32 6 176 6 112 3 44 5

1840 1080

el.1680 1050 1680 1050 1280 1024 1920 1080

w. wj2240 1089 1688 1062 2200 1125 67.5 60 -8-

65.290 59.954

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63.981 60.02

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148.50

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248 38 80 21 280 30 248 34 143 36

DISASSEMBLY-Set#1 #2

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Consequently, pull the base directly. #5

Put the front cover upward. Then let the all latches are separated.

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#6

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#3

#4

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Put the monitor on a soft flat.

Revolve the release button.

#7

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Pull the key board out of bezel. #9 #10

Disassembly the bezel.

Disassembly the LVDS cable. #11

Main board and power board.

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#13

#14

Rear cover and hinge ASSY. #15 #16

Disassemble the rear cover and hinge ASSY.

Disassemble the hinge and stand.

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el.Hinge top, hinge and stand.

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BLOCK DIAGRAM

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BLOCK DIAGRAM-POWERPower100~240V EMI filter Rush preventionRectification Transformer Diode rectifier

5V

16V Starting resistor

output OVP

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control circuit

circuit (PWM

Inverter16V Push-pull circuit

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PWM IC ta9687GN

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5V/16V

Feedback

Switching OVP protect circuit

Feedback circuit

Lamp open protection

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DESCRIPTION OF BLOCK DIAGRAM1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is from 25MHz to 148.5MHz. This part consists of the Scalar, ADC converter, TMDS receiver and LVDS transmitter. The Scalar gets the video signal converted analog to digital, interpolates input to 1920 X 1080 resolution signal and outputs 8-bit R, G, B signal to transmitter.

This part consists of the one 3.3V, and one 1.8V regulators to convert power which is provided 5V in Power board. 16V is provided for inverter, 5V is provided for LCD panel.

Also, 5V is converted 3.3V and 1.8V by regulator. Converted power is provided for IC in the main board. The inverter converts from DC 16V to AC 700Vrms and operates back-light lamps of module. 3. MICOM Part.

This part is including video controller part. And this part consists of Reset IC and the Micom.

The controlled data of each mode is stored in scalar.

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The Micom distinguishes polarity and frequencies of the H/V sync are supplied from signal cable.

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2. Power Part.

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LIPS Board Block Diagram

Operation Description_LIPS1. EMI components.

This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse.

This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor. 3. Energy Transfer.

This part function is for transfer the primary energy to secondary through a power transformer.

This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized, and also the over power protection is also monitor by this part. 5. Photo-Coupler isolation. This part function is to feed back the DC output changing status through a photo transistor to primary controller to achieve the stabilized DC output voltage. 6. Signal collection. This part function is to collect the any change from the DC output and feed back to the primary through photo transistor. - 15 -

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4. Output rectifier and filter.

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2. Input rectifier and filter.

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ADJUSTMENTWindows EDID V1.0 User Manual Operating System: DOS,