Samsung HT-D4500 - Page 19

4.Troubleshooting
■BDHTSSMPSconsistsof2converters
•Mainconverter
•ICM801,TS802S
•Makesvoltagesformainboard
•Worksalways,butonly5.4Visoutputinstand-bymode
•Amplierconverter
•ICA801,MA801,TA801S
•MakesamplierPVDDvoltage
•Worksafterpoweron
No5.4Voutput
•CheckfuseFP801S
•ICM801pin2over1V
•ICM801pin7:14~18V
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Replaceifopen
Checkforshortage
Checksecondarydiodesdirection(DM825/826):replaceICM1
Novoltageafterpoweron
•No12V
•No-28V(-VP)
•No-12V
•No4.1V(±VFD)
•Noallabovevoltages
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CheckMM821
CheckTRM824,TRM825
CheckICM821,TRM821,TRM822
CheckTRM823
CheckTRM826,Ponsignal(CN803pin4)
NoPVDDvoltage
•ICA801pin62~4V
•ICA1pin714~19V
•
•
••ICA11V<pin2<4.2V
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CheckTRA802
CheckTRA801/802
CheckOCM801
CheckMA801,TA801S,DRA821/822
Checkforshortage
ReplaceICA1
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