LG 27LS5400 / 27LS540T (CHASSIS:LD02M) Service Manual ▷ View online
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* When doing Adjustment, Please make circumstance as
below.
4.5. DPM Operation check
■ Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to RGB-PC and connect D-sub cable to set -
RGB Mode. Set Input to HDMI1/2(with Input Label set to
PC) and connect HDMI1/2 cable to set - HDMI Mode
2) Cut off H sync or V sync of signal.
3) Check DPM operation refer to the below table.
4.6. Model name & SW version & Adjust check.
* Press the ‘Instart’ key of ADJ remote controller
4.6.1. Model Name& SW Version Check
1) Check ‘Model Name’.
2) Check ‘S/W Version’ (Refer to the IC Ver. in the BOM)
4.6.2. Adjust Check
1) Check ‘Country Group’
2) Check ‘Area Option’
3) Check ‘Tool Option’ (Refer to the BOM Comments)
4) Check ‘Adjust ADC[Comp&RGB]’ is OK.
5) Check ‘EDID[RGB&HDMI1/2]’ is OK.
* After check all, Press the 'EXIT' key of ADJ remote control to
go out SVC menu.
4.7. Outgoing condition Configuration
* After all function test., press IN-STOP Key by SVC Remote
control. And make Outgoing Condition.
Operating Condition
Sync(H/V) Video LED(SET) Wattage(W)
Power S/W On Sleep mode -
RGB, HDMI
Off/Off
Off
Amber
1
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TROUBLE SHOOTING
1. No Power
Check L800 All
Voltage Level (19V)
Check Power connector
OK ?
Replace Adapter
N
N
Check IC802 output
Voltage Level (5V)
Replace IC802 &
Recheck
N
Check IC2602 Output
Voltage Level (3.3V_ST)
Replace IC2602
N
Y
Check IC806 Output
Voltage Level (1.24V)
Replace IC806 &
Recheck
N
Y
Y
Check IC810 Output
Voltage Level (2.5V)
Replace IC810 &
Recheck
N
Y
Check IC807 Output
Voltage Level (1.5V)
Replace IC807 &
Recheck
N
Y
Check X201 Clock
24MHz
Replace X201
N
Replace IC100 Flash Memory
Y
Y
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2. No Picture
Module
Back Light On ?
Check WLED_ENABLE high
R1127
Check IC101
Replace Main Scaler IC
N
N
Check Panel clock
P1002(#10,11,22,23)
Check IC101
Repair Main B/D
N
Check Panel power
P1002(#1,2,3) 5V
IC802 Output 5V
Replace IC802
N
Y
Replace T-con
Board or module
Check FFC Cable for damage
or open conductors.
Replace Cable
N
Y
Y
Y
Check LED Driver output
(P1101/P1103 #1,2,5,6)
Check LED Driver IC1100
Replace LED Driver IC
N
Y
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3. No Video-TV
Check Tuner(TU2601 or 02 or 03)
SIF #6 CVBS #8
Replace Tuner(TU2601 or 02 or 03)
Recheck
N
Y
Check RF Cable
Y
1. Check Tuner(TU2601 or 02 or 03 #5) Power (3.3V)
2. Check IC803 Output voltage(3.3V)
Replace IC803
Y
N
Check Tuner(TU2601 or 02 or 03) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
N
1. Check Tuner(TU2601 or 02 or 03 #7) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
For TU2601, check #13 Power (1.23V) and IC806 also
Replace IC805
Replace IC806
Y
N
Check Tuner(TU2601 or 02 or 03) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
N
Y
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