I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.
On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off and on rapidly. Sometimes it would stayed off a few 5-10 seconds, then powered on, then repeating the clicking off and on cycles. I powered it down, wait for a minute or so, then powered it up again - this cycles went on for the 20-30 seconds, then a quick flashlight on the fuse, and everything stopped. Checked the fuse and it is opened. When I power down, then on again with the blown fuse, it clicked but nothing else happened.
Quick visual check find nothing obviously burnt, nor any burning smell. But noticed the the big capacitors are slightly bulging.
Any clue on what was happening? Could it be the CD input or these capacitors be the cause of the power clicking off and on?
And what would be the next steps with the diagnostics?
Thank you very much.
On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off and on rapidly. Sometimes it would stayed off a few 5-10 seconds, then powered on, then repeating the clicking off and on cycles. I powered it down, wait for a minute or so, then powered it up again - this cycles went on for the 20-30 seconds, then a quick flashlight on the fuse, and everything stopped. Checked the fuse and it is opened. When I power down, then on again with the blown fuse, it clicked but nothing else happened.
Quick visual check find nothing obviously burnt, nor any burning smell. But noticed the the big capacitors are slightly bulging.
Any clue on what was happening? Could it be the CD input or these capacitors be the cause of the power clicking off and on?
And what would be the next steps with the diagnostics?
Thank you very much.
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