Kenwood L08m relay problem

[pwdiya12]

Thanks @pitbul- will check S2 and report back


the Q25 probe was between the collector of Q25 and point 23 on the PCB, i,e, earth- which I have been using for all measurements


and will check the board (again) to be sure-


Thanks once more


Peter

 

[pitbul]

To clarify what I mean with return path, it is negative feedback. My native language is not English, I am sorry.

 

[pwdiya12]

@pitbul- no apologies necessary- I am very grateful for your assistance and insights


I will come back to you on S2 once I have checked and cleaned thoroughly


Peter

 

[pwdiya12]

I am very very happy to report that with the switch cleaned- we now have working relays and signal!


@pitbul thanks for your insight and explanations.

@mbz and@techtool- thanks for coming on the journey


Two lessons- 1) always see how you can separate the circuit into blocks for diagnosis and 2) always look to the electro-mechanical as first likely point of failure.



For reference the G2R-24v negative feedback relay may be replaced with a TE Connectivity V32101D- Mouser part 655-1-1393779-8


The main speaker relay is a G2Z-222P-US- and is unobtainable, however this site has a replacement with a small PCB-



Omron G2Z-222P-US replacement – Audioberg.dk


Thanks again

 

[pitbul]

Glad to hear that you succeeded.

 

[techtool]

Also glad to hear that you succeeded. And many thanks to @pitbul.... I enjoyed reading and learning from your detailed posts as well.