LG FLATRON W2442PA Service Manual page 16

NO RASTER
(OSD IS NOT DISPLAYED)
CHECK P402
1
VOLTAGE PIN5,6
P402 PIN9 5V?
2
CHECK P402
PULSE AS
CONTACTING PROBE
3
TO THE LAMP
WIRE OF THE
LCD MODULE
REPLACE LCD MODULE
Waveforms
1
P402-#5,6
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
PIN10
YES
CHECK
YES
2 P402 -#10
NO
NO
NO
NO
3
LAMP CURRENT
- 16 -
CHECK POWER BOARD
(LIPS)
CHECK U501 INVERTER
ON/OFF PORT
1. CONFIRM BRIGHTNESS
OSD CONTRL STATUS
2. CHECK MICOM DIM-ADJ
PORT
POWER BOARD (LIPS)
LGE Internal Use Only