LG Flatron L206WU Service Manual page 16

NO RASTER
(OSD IS NOT DISPLAYED)
CHECK P703
1
VOLTAGE PIN5,6
2
P703 PIN9 3.3V?
CHECK P703
3
PIN11
CHECK
PULSE AS
CONTACTING PROBE
4
TO THE LAMP
WIRE OF THE
LCD MODULE
REPLACE LCD MODULE
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
(5V)?
YES
YES
YES
YES
3
P703-#11 (Brightness 100)
NO
NO
NO
NO
1
P703-#5,6
3
P703-#10 (Brightness 0)
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CHECK POWER BOARD
(LIPS)
CHECK IC502 INVERTER
ON/OFF PORT
1. CONFIRM BRIGHTNESS
OSD CONTRL STATUS
2. CHECK SCALER DIM ADJ
PORT
3. CHECK SCALER LAMP
ADJ PORT
POWER BOARD (LIPS)
Waveforms
2
P703-#9
4
LAMP CURRENT
LGE Internal Use Only