Troubleshooting - LG 32LG30 Service Manual

1. Power-up boot fail
Check P700 All.
Voltage Level(5V, 12V, 16V)
Yes
Check Q706 Output.
Voltage Level(12V or 5V)
Yes
Check IC704 #2 Pin.
Voltage Level 2.6V
Yes
Check X100 clock.
12MHz
2. Digital TV Video
Check RF cable.
Yes
Check Tuner 5V Power
IC710 #3 Pin
Yes
Check IF_P/N Signal
Yes
Check Check Demodulator Input Clock
X400(25MHz)
Yes
Check IC400(LGDT) Output
- Ar401, AR402
Yes
Check Mstar LVDS output.
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Only for training and service purposes

TROUBLESHOOTING

No
Check Power connector.
OK?
No
Replace Q706 & Recheck.
No
Replace IC704 & X100.
No
Replace X100.
No
Replace IC710.
No
Bad Tuner. Replace Tuner.
No
Replace X400.
No
Replace IC400.
No
Replace Mstar(IC100).
- 14 -
Yes
Replace Power board.
LGE Internal Use Only