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Good evening,
I have subject active on the bench at moment. Flashing power led but power supply is fine 28vdc+- on the rails. Leave it switched on in 'flashing' mode for about a minute then the led stays on. barely audible sound through speaker. Could it be the caps in the power supply failing - although the voltage is steady - or is the amp board failed? Amp boards are no too expensive - I swapped out the TDA chip for a new 1 without any luck. I have a feeling the failure, if it's the board, is the small chip on the underside (which handily enough has no markings or identification).
I would normally swap out the board at this stage but if that's not the issue (the LED thing is bugging me) where do you stop in replacing boards???
Cheers guys.
J
I have subject active on the bench at moment. Flashing power led but power supply is fine 28vdc+- on the rails. Leave it switched on in 'flashing' mode for about a minute then the led stays on. barely audible sound through speaker. Could it be the caps in the power supply failing - although the voltage is steady - or is the amp board failed? Amp boards are no too expensive - I swapped out the TDA chip for a new 1 without any luck. I have a feeling the failure, if it's the board, is the small chip on the underside (which handily enough has no markings or identification).
I would normally swap out the board at this stage but if that's not the issue (the LED thing is bugging me) where do you stop in replacing boards???
Cheers guys.
J
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