Hi this amplifier has a few bulging capacitors in the smps, it is currently fully operational but i wanted to replace the faulty/failing caps as a precaution.
what do i need to look for regarding capacitor specifications when replacing smps caps? The main input caps are 680uf 400v and also the output rail cap are 1500uf 160v and 470uf 160v
regards Greg
what do i need to look for regarding capacitor specifications when replacing smps caps? The main input caps are 680uf 400v and also the output rail cap are 1500uf 160v and 470uf 160v
regards Greg
Attachments
Try to get exact replacements. Otherwise, low ESR is necessary.
Rating of 105C is desirable also. Of course, same or higher voltage.
If originals are not available, look up the original caps' specs and
try to equal or exceed them in these respects for the replacements.
Last edited:
The plastic covers normally bulge and that is due to the plastic disks used.
Only replace the capacitors that have leaks. The capacitors in the power supply are vented at the connection end, not the top. They look perfectly OK to my 50 years of experience.
Don't waste your money and time.
Only replace the capacitors that have leaks. The capacitors in the power supply are vented at the connection end, not the top. They look perfectly OK to my 50 years of experience.
Don't waste your money and time.
Thanks Jon and rayma, there is definitely bulging on 2 of the main caps but no leaking. also due to the age (20years old) im inclined to replace them.
So I finished my recap, 2 of the main input ps caps measured under 10uf instead of 680uf, and 4 of the filter caps were the same. Only 2 were visibly bulging. And none leaking. Amp is functioning well now. Out put exceeds spec and sounds lovely. Greg
This is what I would expect, the capacitors are manufactured at the same time and are of the same construction and used in the same way so I would expect them to all be degraded.
- Status
- Not open for further replies.