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   MattChippytea (wifiwits@infosec.exchange)'s status on Sunday, 02-Nov-2025 06:35:24 JST MattChippytea

   in reply to

   I have to say, despite the parts challenge vintage audio stuff like this is a joy for an electronics idiot like me. Lots of space, discrete boards that have a nice clear purpose. Easy soldering. I can almost feign competence.

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     botvolution (botvolution@mastodon.sdf.org)'s status on Sunday, 02-Nov-2025 06:35:24 JST botvolution

     in reply to

     @Wifiwits
     Something in the massive bank of filters i use to keep me sane on here is also hiding your original post in this thread. I cant work out what it is though . (I read it using another unfiltered account).

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     MattChippytea (wifiwits@infosec.exchange)'s status on Sunday, 02-Nov-2025 06:35:25 JST MattChippytea

     in reply to

     Squeezed to the heat sink here is a Sanken SI-1125HD. One of a number of hybrid amplifier modules very popular with manufacturers of the era. It contains most of a stereo 25W amplifier packaged up very nicely. These have not been manufactured for many years and are unobtanium. So, if this has died I’ll replace the entire board with something new and likely class D. Fortunately it looks like that would be easy to do.

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     MattChippytea (wifiwits@infosec.exchange)'s status on Sunday, 02-Nov-2025 06:35:25 JST MattChippytea

     in reply to

     For now I’ve rudely pulled the top off this relay and given the contacts a clean. 🤞

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     MattChippytea (wifiwits@infosec.exchange)'s status on Sunday, 02-Nov-2025 06:35:26 JST MattChippytea

     in reply to

     What I’m hoping the problem is: dulled contacts in the speaker protection relay through lack of use.
     What I fear the problem could be: failure of the Sanken amplifier module

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     MattChippytea (wifiwits@infosec.exchange)'s status on Sunday, 02-Nov-2025 06:35:27 JST MattChippytea

     Had a delve into the auction purchase vintage music centre. It has mostly been working well, other than intermittent disappearing audio on both channels, mostly the right.