LG L30W36 Service Manual

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1. Application Object

These instructions are applied to all of the MODELS of LCD MONITOR, MF-02HA.

2. Notes

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation transformer will help protect test instrument.

(2) Adjustment must be done in the correct order. But, it can

be changed in consideration of mass production.

(3) The adjustment must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity if there is no specific designation.

(4) The input voltage of the receiver must keep 100-240V,

50/60Hz in adjusting.

[ Input voltage is possible from 85V to 260V because the

power voltage applied to this chassis is Wide-Range. But, adjustment should be operated in 100-240V, 50/60Hz if there is no specific designation.

(5) The receiver must be operated for about 15 minutes prior

to the adjustment. ¤ After receiving 100% white pattern(06CH), the receiver

must be operate prior to adjustment.(Or white condition in HEAT-RUN mode)

¤ŁEnter into HEAT-RUN mode

- Select HEAT RUN OFF by pressing ADJ button on Remote Control for adjustment.

- Press the VOL + button in HEAT-RUN OFF.

(OSD displays HEAT-RUN WHITE and screen displays 100% full WHITE PATTERN)

[ Set is activated HEAT-RUN without signal generator

in this mode.

[ Single color pattern of HEAT-RUN mode can be used

to check PANEL.(RED/BLUE/GREEN)

[Caution] If you turn on a still screen more than 20 minutes

(especially, Digital pattern[13 CH], Cross Hatch Pattern[09CH]), a afterinage may be occur in the black level part of the screen.

3. Adjustment Items

3-1. Whole Assembly Adjustment

(1) White Balance Adjustment (2) SUB-BRIGHT Adjustment : Sub-Bright adjustment in LCD

panel is not necessary. Do not adjust sub-bright if there is no specific designation.

(3) RGB CUT-OFF Adjustment : Under examination about

auto adjustment which correspond to the new Rembrandt1A.

3-2. EDID (The Extended Display

Identification Data) Adjustment

(1) This is the function that is made for the realization of “Plug

and Play” which makes possible to use the user environment right after reorganization by communicating with monitor automatically.

(2) EDID DATA for DVI of MF-02HA

EDID table =

00 01 02 03 04 05 06 07 08 09

_________________________________ 000 | 00 FF FF FF FF FF FF 00 1E 6D 010 | D7 3A 01 01 01 01 33 0B 01 01 020 | 81 40 26 96 08 B7 FB A1 56 48 030 | 98 24 13 48 4B AF EF 00 81 00 040 | 31 59 45 59 61 59 81 80 71 4F 050 | 01 01 01 01 BC 34 00 98 51 00 060 | 2A 40 10 90 13 00 40 26 00 00 070 | 00 1E 00 00 00 FC 00 4D 57 20 080 | 33 30 4C 5A 31 30 0A 20 20 20 090 | 00 00 00 FD 00 3C 78 1F 5B 10 100 | 00 0A 20 20 20 20 20 20 D5 09 110 | 80 A0 20 E0 2D 10 10 60 A2 00 120 | EE F0 75 00 00 18 00 BD

(3) EDID DATA for RGB of MF-02HA

EDID table =

00 01 02 03 04 05 06 07 08 09

__________________________________ 000 | 00 FF FF FF FF FF FF 00 1E 6D 010 | D7 3A 01 01 01 01 33 0B 01 01 020 | 1E 40 26 96 08 B7 FB A1 56 48 030 | 98 24 13 48 4B AF EF 00 81 00 040 | 31 59 45 59 61 59 81 80 71 4F 050 | 01 01 01 01 BC 34 00 98 51 00 060 | 2A 40 10 90 13 00 40 26 00 00 070 | 00 1E 00 00 00 FC 00 4D 57 20 080 | 33 30 4C 5A 31 30 0A 20 20 20 090 | 00 00 00 FD 00 3C 78 1F 5B 10 100 | 00 0A 20 20 20 20 20 20 D5 09 110 | 80 A0 20 E0 2D 10 10 60 A2 00 120 | EE F0 75 00 00 18 00 BD

(4) Refer to Service Manual related to EDID communication.

4. Whole Assembly Adjustment

<Caution> Each PCB Assy must be checked by Check JIG Set

before assemling.(Be careful about power PCB ASSY which can give a fatal damage to the LCD Module)

4-1. White Balance Adjustment

(1) Required Equipment

Color analyzer(CA-100 or same production)

ADJUSTMENT INSTRUCTION

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(2) Connection Diagram of Equipment for

Measuring (Automatic Adjustment)

Connect RS-232C to Adjustment Equipment and SET. Automatization operating room has in charge of managing and repairing about adjusting equipment. Only adjust HIGH LIGHT and RGB input adjusts R-GAIN/GGAIN/B-GAIN automatically. Automatic adjustment equipment decides the values of RGAIN/G-GAIN/B-GAIN by correcting color coordinates/white balance and transmits them into SET and finally the SET saves data values.

(3) White Balance Adjustment(Manual Adjustment)

¯ Operate Zero Calibration of CA-100 and Sensor must be

stick completely to the surface of LCD module

¯ Devide Manual adjustment into AV/PC and operate

adjustment by the following sequence.

¯ Manual adjustment is a temporary method when automatic

adjustment is not correspondent.

1. AV W/B adjustment

1) Select WHITE PATTERN of HEAT RUN mode by pressing ADJ button on Remote Control for adjustment then operate HEAT RUN more than 15 minute

2) Supply pattern signal for WB adjustment in pattern generator. (AV INPUT)

3) Low Light has no special adjustment.

4) To adjust High Light, stick sensor to 2th pattern(White), select and adjust the AV GAIN by pressing INSTSRT button on Remote Control for adjustment. After select the R GAIN and G GAIN, enter Adjustment Mode by pressing ENTER button and press the VOL +/Key and adjust it until color coordination becomes (B GAIN is fixed) color coordination : X=0.283±0.003, Y=0.296±0.003 color temperature : 9,350°K ± 500°K

5) Exit adjustment mode using Enter button.

2. PC W/B Adjustment

1) Select WHITE PATTERN of HEAT RUN mode by pressing ADJ button on Remote Control for adjustment then operate HEAT RUN more than 15 minute.

2) Supply pattern signal for WB adjustment in pattern generator.(RGB1 INPUT)

3) Low Light has no special adjustment.

4) To adjust High Light, stick sensor to 2th pattern(White), select and adjust the PC GAIN by pressing INSTSRT button on Remote Control for adjustment. After select the R GAIN and G GAIN, enter Adjustment Mode by pressing ENTER button and press the VOL +/-

Key and adjust it until color coordination becomes (B GAIN is fixed) color coordination : X=0.283±0.003, Y=0.296±0.003 color temperature : 9,350°K ± 500°K

(R Gain is used to adjust X-coordinates while adjusting and X-coordinates could be shortened when R Gain is increased. G Gain is used to adjust Y-coordinates while adjusting andY-coordinates could be shortened when G Gain is increased.)

5) Exit adjustment mode using Enter button.

3. Component (480p~1080i) Offset Adjustment

¯ Use this adjustment when the Grayscale out of Ch13.

Pattern has red or blue while producing set.

¯ This adjustment is used to remove the declination of

YPbPr Offset in AD9888.

1) Operate the adjustment after PC/AV White Balance adjustment progress.

2) Select Ch.14 after connect DTV STB to Component (480p~1080i) terminal and AV terminal.

3) When you press ADJ button twice on the R/C for adjustment, the SET goes to DWI condition and Main Window(right side)/Sub Window(left side) are set to AV mode.

4) In this condition, adjust R with ‘DTV R OFFSET’ and B with ‘DTV B OFFSET’ based on ‘foundation color(Gray)’ of Ch.14.

5) Exit adjustment mode using Enter button.

Window

MASTER or

QUANTUM DATA

COLOR

ANALYZER

TYPE;CA-100 RGB Signal Input

LCD MONITOR

High Light

450±70cd/m

(Fig. 1) Connection Diagram of Automatic Adjustment

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Symptom Cause Check Point

1) Check BD801, Q801, Q802, Q804

2) Check BD801, L801, L802, TH800, TH801

1) Check the second side parts and Pattern short

2) Check reverse input of PH801, D916, CR802

3) Check R941~R944 when the Pin Bias power no7. of U902 is abnormal. (normal: 15V~25V)

- Replace U902(FAN7554) parts

- Check the error of Q804

4) Replace T803

1) Check the peripheral parts of 18V and Pattern short.

2) Check reverse input of D916(SB560)

3) No Input of L812 when both terminal voltage of C830 are low. (normal voltage: +24V)

- Replace U802(PQ1CG203) parts when there is no

error.

1) Check the peripheral parts of 5VS and Pattern short.

2) Check reverse input of D802, CR801

3) Check R937~R939 when the Pin Bias power no7. of U903 is abnormal. (normal: 15V~25V)

- Replace U903(FAN7554) parts

- Check the error of Q802

4) Replace T802

1) Replace U901(MC33368D) when there is no error in the peripheral parts.

- Check the error of Q801

2) Replace T801

1) Fuse open

2) Error of rectying circuit/EMI Filter

1) Short of output terminal

2) Input error of parts

3) Error of U902 and peripheral circuits.

4) Error of T803

1) Short of output terminal

2) Input error of parts

3) Error of U802 and peripheral circuits.

1) Short of output terminal

2) Input error of parts

3) Error of U903 and peripheral circuits.

4) Error of T802

1) Drop of output power due to the error of PFC circuit.

2) Error of T801

1. No power from all outputs

2. No power from +24V/+12V /+18V

3. No power from +18V

4. No power from +5VS

5. No power from +24V/+12V /+18V in 110VAC Input

TROUBLESHOOTING

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PRINTED CIRCUIT BOARD

MAIN(TOP)

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MAIN(BOTTOM)

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SIDE A/V(TOP)

SIDE A/V(BOTTOM)

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