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SA-6500II turns on with a "clunk"

soundweasel

soundweasel

Super Member
I moved this down from the Vintage Solid State Forum so the Pioneer experts could take a crack at this.

My trusty "daily driver" Pioneer SA-6500II (with matching tuner) has always been a very quiet on/off unit. However, when I turned it on recently it made a clunk sound. It doesn't make the sound when turning the unit off. The noise is still the same level when the volume is turned down. One day it was fine, the next...

I cleaned the power switch so it's not that. Unit runs cool. Sounds great. Everything else is fine with the unit.

The "clunk" continues. :sigh:

I assume one or more caps need to be replaced.

Since I lack the technical skills -- and test equipment -- for complex diagnostics and repairs, I need some help identifying the most likely cause.

Could someone familiar with this situation -- and with an SA- 6500II --photograph the inside of their 6500 with the potentially offending caps marked with blue tape or something to identify the ones I should replace?!

I'll replace just those caps and hopefully it will solve the problem. If not, well, heck, it was worth a shot.

Anyone up for this game of "hide, seek and repair"? :D

Thanks in advance to anyone who steps forward. :thmbsp:
 
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Do you have a DMM, because if it gets past the capacitor stage (like a dead transistor), we WILL need to read voltages and test diodes. A decent DMM will set you back about 30 bucks w/o tax & shipping, IF you can't borrow one.

But YOU have to do some stuff on your end - like downloading the manual and figuring out how to find the capacitors by Cxx number - not hard at all.
 
Hi -- I've got a DMM. I can get the manual if it's in the archive, or, I think Grateful (Dave) has one. Let me do that first!

Thanks,

Doug


markthefixer said:
Do you have a DMM, because if it gets past the capacitor stage (like a dead transistor), we WILL need to read voltages and test diodes. A decent DMM will set you back about 30 bucks w/o tax & shipping, IF you can't borrow one.

But YOU have to do some stuff on your end - like downloading the manual and figuring out how to find the capacitors by Cxx number - not hard at all.
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