Trouble Shooting - LG RT-29FC90RB Service Manual

Check the voltage of C404(+).
Check / Replace
R407,D861,FB854.
Check / Replace
R865,R864,L853,D850,FB856.
Check / Replace
R809,D802,R803,R810.

TROUBLE SHOOTING

Check / Replace
Q871,Q852,Q854,
IC803,IC851
Check the H-DRV voltage at
pin 5 of P214A.
5.5Vp-p
Check / Replace
67V
Check the voltage at
pin 2 of FBT.
Check the voltage of C821.
Check the voltage at
pin 4 of STR.
Check / Replace
IC801 and the
secondary part of
POWER circuit.
- 15 -
Check pin 2 of P004A.
Check the voltage at
pin 10 of P004A.
2Vp-p
Check / Replace
IC001,Q002.
0V
IC501S.
135V
Check / Replace
Q401, Q402, T401.
Check / Replace
SW1101,F1101,T1101,
DB814,TH810.
17.8V
1V
0V
Check / Replace
FR359,FR360,D339,D349,IC301.