LG FlatronL204WT Service Manual page 16

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK P702
1
VOLTAGE PIN5,6
(5V)?
YES
P702 PIN9 5V?
YES
2
CHECK P702
3
PIN10 PIN11
YES
CHECK
PULSE AS
CONTACTING PROBE
4
TO THE LAMP
WIRE OF THE
LCD MODULE
YES
REPLACE LCD MODULE
3
P702-#11
Brightness 100
- 16 -
NO
NO
NO
NO
Waveforms
1 P702-#5,6
3
P702-#11
Brightness 0
CHECK POWER BOARD
(LIPS)
CHECK IC501 INVERTER
ON/OFF PORT
1. CONFIRM BRIGHTNESS
OSD CONTRL STATUS
2. CHECK MICOM DIM-ADJ
PORT
3. CHECK SCALER LAMPADJ
PORT(L204WT/WTM)
POWER BOARD (LIPS)
2
P702-#10
4
Lamp current