LG Lafinion 82W, Service Manual

Page: 14 / 42

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TROUBLE SHOOTING
17.8V
Q401, Q402, T401.
67V
R407,D861,FB854.
R865,R864,L853,D850,FB856.
1V
pin 2 of FBT.
2Vp-p
0V
Q871,Q852,Q854,
IC803,IC851
Check pin 2 of P004A.
Check / Replace
Check / Replace
IC801 and the
secondary part of
POWER circuit.
Check / Replace
R809,D802,R803,R810.
Check / Replace
SW1101,F1101,T1101,
DB814,TH810.
Check / Replace
Check / Replace Check / Replace
IC501S.
Check / Replace
FR359,FR360,D339,D349,IC301.
Check / Replace
IC001,Q002.
Check / Replace
Check the voltage at
pin 4 of STR.
Check the voltage at
pin 10 of P004A.
Check the voltage at
Check the voltage of C404(+).
Check the voltage of C821.
pin 5 of P214A.
Check the H-DRV voltage at
135V
5.5Vp-p
0V