No Power - Samsung HT-E6730W Service Manual

4.1.1. No Power

No P owe r De te cte d
(St a nd by LED OFF)
AL3.4V Line Volt. is OK ?
Indica te LED851 Light/unlight
ch e ck.
Yes
Che ck MAIN AS S 'Y
- sp e cia lly che ck a round
MICOM IC(Vcc).
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No
Che ck Po we r Cord?
Che ck CM801 ↔
GND_P Volta ge is 200V ~ 400V
→ OK?
Che ck
Se co nda ry Re cti. Diode
(DM863/4, DM866/7 DM872/3,
DA861) → OK ?
Che ck
PW M IC(ICM801, MA801)
Dra in S /W wa ve form
→ OK?
If you didn't know fa ilure
re a so n, re pla ce SMPS .
No
Yes
No
Yes
No
Yes
(1)
No
* Re fe r to wa ve pa tte rn
ima ge of Fig. 4-1 a nd
Yes
Fig. 4-2.
4. Troubleshooting
Re pla ce P owe r Cord.
Che ck FP 801S , NT801S ,
LX801S , LX802S , DBM801.
Re pla ce s e conda ry
re cti. Diode .
Re pla ce ICM801,
MA801, ICA801.
4-2