On Saturday, 15 July 2017 17:25:07 UTC+1, ABLE1 wrote:
On 7/15/2017 8:14 AM, tabbypurr wrote:
On Saturday, 15 July 2017 13:09:57 UTC+1, ABLE1 wrote:

Tom, NT, Phil, Thanks for all the input.

I get the idea on cleaning. BTW as for "Contact Cleaner" I was
referring to this one.

https://www.zoro.com/crc-electronic-...00/i/G8578595/
Or similar, but may not be the most desired.

Phil, as for the term "Circuit Board Cleaner" is there a specific brand
that you use??

Presently searching for replacement caps. Once I acquire them I will
dive into this project.

Another question: Concerning the chip that has been effected. Can or
could the electrolyte leach into the chips at the pins and cause
problems with the chip in some way?? Or is the chip considered
hermetically sealed is some fashion??

Thanks again!! Do appreciate the insight.

Les

if they weren't sealed they wouldn't last long


NT


Thanks NT,

I got it. Was just wondering if the "seal" would be
effected by the leaking electrolyte is some way.

as said it's epoxy on metal so not likely.

As a general question on these capacitors that leaked.
Given the age (20+ years) would it be that they would
have been effected by a power surge or just old age.

old age and/or lack of power

There are other radial caps on the board of the same size
and value that do not show any leakage.

I am asking in respect that given the condition should I
just replace them all or only those that have leaked??

Given the bad state of some caps it's likely there are others that have gone high ESR and/or low capacity but not leaked. Most folk would replace the lot. You can get a £12 chinese component tester that'll tell you real capacity & ESR. See ebay, amazon, banggood etc.


NT

For me this is more of a fun experiment of sorts. I have
been working with various electronics for 40++ years or so.
Running my own business for the past 29 years.

I have in the past but rarely have I gotten down to board level.
As you can guess, if a component or board failed it was trash it
and install a new. For critical devices it is not worth the time
and liability to play around with board components.

This project is quite different. I have already replaced the sound
board with another and the repair project is completed.

Just waiting to be paid. :-)

I just want to see if my observation as to the condition of the caps was
the real problem and can I fix it by doing a little board de-soldering,
etc. Already on Digi-Key trying to source replacements.

Again, thanks for the hints. Have a good rest of your weekend.

Les