Capacitor that determines switch-off-time in BEOLAB 8000 (Phono-input-operation)

3 replies
MH
Martin Hemmi
Bronze
30 posts
Posted December 9, 2020 at 06:33 GMT
#2148244

Dear fellow enthusiasts,

one of my restored BEOLAB 8000 has a slight issue. It switches a bit too fast (5 seconds) from green to red after switching off music. After studying of the circuit diagram I was wondering if C6, C83, or C87 are responsible for that functionality.

What is your experience?

Greetings,

MARtin

MH
Martin Hemmi
Bronze
30 posts
Posted December 10, 2020 at 14:06 GMT
#2148245

Good thought on that 10M resistor!

 

MH
Martin Hemmi
Bronze
30 posts
Posted December 14, 2020 at 09:29 GMT
#2148246

Remark:

By looking at the R141 (10M) which was o.k. I nearby found a small splash of soldering tin under the stereo microscope.... The problem was again sitting in front of the pcb...

Removing the splash of soldering tin and cleaning the pcb wiht CH3(CHOH)CH3 fixed the problem.

Thanks again for the inspiration.

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