4. Troubleshooting
■ BD HTS SMPS consists of 2 converters
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Main converter
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ICM801, TS802S
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Makes voltages for main board
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Works always, but only 5.4V is output in stand-by mode
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Amplifier converter
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ICA801, MA801, TA801S
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Makes amplifier PVDD voltage
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Works after power on
No 5.4V output
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Check fuse FP801S
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ICM801 pin 2 over 1V
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ICM801 pin 7: 14~18V
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Replace if open
Check for shortage
Check secondary diodes direction (DM825/826): replace ICM1
No voltage after power on
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No 12V
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No -28V (-VP)
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No -12V
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No 4.1V (±VFD)
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No all above voltages
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Check MM821
Check TRM824, TRM825
Check ICM821, TRM821, TRM822
Check TRM823
Check TRM826, Pon signal (CN803 pin 4)
No PVDD voltage
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ICA801 pin 6 2~4V
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ICA1 pin 7 14~19V
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•ICA1 1V < pin 2 < 4.2V
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Check TRA802
Check TRA801/802
Check OCM801
Check MA801, TA801S, DRA821/822
Check for shortage
Replace ICA1
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