Troubleshooting Guide - LG Flatron L206WU Service Manual

NO POWER
(POWER INDICATOR OFF)
CHECK P703 VOLTAGE
1
PIN5,6 (5V)?
2
IS IC302 PIN2(1.8V)
IC301 PIN2(3.3V)
1 3
CHECK X200 PIN201
1 4
CHECK IC200
Waveforms
1
P703-#5,6
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

TROUBLESHOOTING GUIDE

1. NO POWER
YES
YES
PULSE
YES
2
IC302-#2
NO
NO
NO
3
IC301-#2
- 15 -
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC702(1.8V)
IC703(3.3V) LINE
CHECK CRYSTAL(X501)
4
X200-#201
LGE Internal Use Only