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Trouble Shooting - LG 29FS2RMB-TP Service Manual

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Check the voltage of C420(+).
Check / Replace
R420, D421, D870, L870.
Check / Replace
D880, R877, R878, L881.
Check / Replace
R804, R805, D802, D804.

TROUBLE SHOOTING

Check / Replace
Q1801, Q821, IC801
Check the H-DRV voltage at
pin 1 of P100.
5.5Vp-p
Check / Replace
67V
Check the voltage at
pin 3 of FBT.
Q423, Q422, T402, D424.
Check the voltage of C809.
Check the voltage at
pin 4 of STR.
Check / Replace
IC801 and the
secondary part of
POWER circuit.
Check pin 1 of P100.
Check the voltage at
pin 32 of P100.
2Vp-p
Check / Replace
IC001,Q002.
0V
IC503, IC501.
135V
Check / Replace
Check / Replace
F1701, SW1701, DB801, TH1801.
17.8V
1V
0V
Check / Replace
R850, R851, D850, D851, IC301.

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