Dom123
Active Member
Hi Everyone,
Just got back to working on my SA-8100. I've replaced all electrolytic caps all boards like for like, just increasing the voltage rating a little. Small value sanyo blue caps were changed for Wima films. Also replaced all 2SA726 and SC1313 for the usual KSA992/KSC1845.
The amp sounds good but has a nasty case of residual DC, emitting a loud snap noise when switching the input from phono to tuner or vice versa.
I suspect the coupling caps on the Control amp board. Thing is the board is the AWG-017B version and the SM I have (AWG017-0) doesn't correspond at all. On my board there are a whole bunch of weird drop or tear shaped capacitors (Tantalums?). There are yellow/red ones with black dot , all which measure differently, green/red white dot (measure approx 1.7uf in circuit) and then grey/black/red with white dots (measure 0.87uf in circuit), and then finally green/purple/yellow white dot (measure approx 3.6uf slowly climbing in circuit.
No idea of the voltage rating
The yellow red capacitor readings are all over the place. The pair coupled to ground pin 11 and 32 is 22uf one side and 2uf the other !
Does anyone have a drawing for AWG017B or a cap list ?
Failing this can I simply change for the next capacitance rating up assuming the values should be either 1uf, 2.2uf, 4.7uf and then 22uf for the caps coupled to pin 11 and 32 ? Also voltage rating 50V I suppose. I hope all polarity markings on the board are correct.
Many thanks.
Just got back to working on my SA-8100. I've replaced all electrolytic caps all boards like for like, just increasing the voltage rating a little. Small value sanyo blue caps were changed for Wima films. Also replaced all 2SA726 and SC1313 for the usual KSA992/KSC1845.
The amp sounds good but has a nasty case of residual DC, emitting a loud snap noise when switching the input from phono to tuner or vice versa.
I suspect the coupling caps on the Control amp board. Thing is the board is the AWG-017B version and the SM I have (AWG017-0) doesn't correspond at all. On my board there are a whole bunch of weird drop or tear shaped capacitors (Tantalums?). There are yellow/red ones with black dot , all which measure differently, green/red white dot (measure approx 1.7uf in circuit) and then grey/black/red with white dots (measure 0.87uf in circuit), and then finally green/purple/yellow white dot (measure approx 3.6uf slowly climbing in circuit.
No idea of the voltage rating
The yellow red capacitor readings are all over the place. The pair coupled to ground pin 11 and 32 is 22uf one side and 2uf the other !
Does anyone have a drawing for AWG017B or a cap list ?
Failing this can I simply change for the next capacitance rating up assuming the values should be either 1uf, 2.2uf, 4.7uf and then 22uf for the caps coupled to pin 11 and 32 ? Also voltage rating 50V I suppose. I hope all polarity markings on the board are correct.
Many thanks.