LG Flatron W2284F - Troubleshooting Guide; No Power Issues

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK IC200
NO
NO
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC503(5V)
IC501(3.3V)
IC502(1.8V)LINE
NO
CHECK CRYSTAL(X200)
YES
YES
YES
CHECK P403 VOLTAGE
PIN1, PIN2 (12V)?
IS IC503 PIN5(5V)
IC501 PIN3(3.3V)
IC502 PIN2(1.8V)
CHECK IC200 PIN127
PULSE
1
2
13
14
Waveforms
1
P403-#1,2
2
IC501-#2
3
IC502-#2
4
IC200-#127