LG Flatron W2284F Service Manual page 16

NO RASTER
(OSD IS NOT DISPLAYED)
CHECK P403
1
VOLTAGE PIN1,2
P403 PIN7 3.3V?
2
CHECK P403
3
PIN6
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
(12V)?
YES
YES
YES
YES
P403-#6 (Brightness 100)
3
NO
NO
NO
NO
P403-#1,2
1
P403-#6 (Brightness 0)
3
- 16 -
CHECK POWER BOARD
(LIPS)
CHECK IC200 INVERTER
ON/OFF PORT
1. CONFIRM BRIGHTNESS
OSD CONTRL STATUS
2. CHECK MICOM DIM-ADJ
PORT
POWER BOARD (LIPS)
Waveforms
P403-#7
2
5
LAMP CURRENT
LGE Internal Use Only