I have a Sansui A80 amp that has a strange issue (to my mind).
I've replaced the PS caps and when I turned the amp on through my dim bulb, the lamp stayed bright. I noticed that the speaker switch was on and when it was turned off the lamp dimmed. When I turned the amp on with the speaker switch off the lamp dimmed immediately and didn't brighten after the speaker switch was turned on.
The other issue, which may be associated is when the amp is turned off and after perhaps 10 seconds there is an echo-y thump from the speakers. I know that I can get around the problem by turning the speakers off first but it seems to me it shouldn't be like this. Any ideas please?
Regards John L.
I've replaced the PS caps and when I turned the amp on through my dim bulb, the lamp stayed bright. I noticed that the speaker switch was on and when it was turned off the lamp dimmed. When I turned the amp on with the speaker switch off the lamp dimmed immediately and didn't brighten after the speaker switch was turned on.
The other issue, which may be associated is when the amp is turned off and after perhaps 10 seconds there is an echo-y thump from the speakers. I know that I can get around the problem by turning the speakers off first but it seems to me it shouldn't be like this. Any ideas please?
Regards John L.
Disconnect the speakers. With the speaker switch set to on, power the unit through your DBT. Measure the DC voltage at the speaker terminals for both channels.