Hallo Guys,
i´m new to the forum but I need your help.
I own a Sansui AU-X501 Amp and i tried to adjust the center DC 0V as stated in the service manual.
(Link to the service Manual: https://elektrotanya.com/sansui_au-x501_integrated_stereo_amplifier.pdf/download.html
I measured the voltage across the speaker terminal and slighly moved the variable resistor, but then the Amp moved into protection and is in this state since.
I allready measured all the resistors in the protection section and the all seem fine. The variable resitors also seem to work, there changing their resistance when turning.
Also the power board is receiving power.
Does somebody have any Idea what the problem might be?
In kind regards,
Minemas.
i´m new to the forum but I need your help.
I own a Sansui AU-X501 Amp and i tried to adjust the center DC 0V as stated in the service manual.
(Link to the service Manual: https://elektrotanya.com/sansui_au-x501_integrated_stereo_amplifier.pdf/download.html
I measured the voltage across the speaker terminal and slighly moved the variable resistor, but then the Amp moved into protection and is in this state since.
I allready measured all the resistors in the protection section and the all seem fine. The variable resitors also seem to work, there changing their resistance when turning.
Also the power board is receiving power.
Does somebody have any Idea what the problem might be?
In kind regards,
Minemas.
There´s a chance, that you have burnt your output´s.
All those trimpots, after years and years of service have a tendency to burn a spot where positioned.
When moving them, there´s a big chance, that they for a split second lose contact.
You should have cleaned them first, set them to minimum, turned on power and slowly tried to adjust them.
Even better, replace both the bias pots and the zero voltage pots.
All those trimpots, after years and years of service have a tendency to burn a spot where positioned.
When moving them, there´s a big chance, that they for a split second lose contact.
You should have cleaned them first, set them to minimum, turned on power and slowly tried to adjust them.
Even better, replace both the bias pots and the zero voltage pots.
Hey, thanks for your very quick reply.
How can i measure those outputs?
I assume you mean the big BJTs that are mounted to the heatsink.
I think in the schematic they are labeled as 2SC3858 and 2SA1494.
Also thanks for your advice, I will remember it next time.
What can i replace those trimpods for?
Kind regards,
Minemas.
How can i measure those outputs?
I assume you mean the big BJTs that are mounted to the heatsink.
I think in the schematic they are labeled as 2SC3858 and 2SA1494.
Also thanks for your advice, I will remember it next time.
What can i replace those trimpods for?
Kind regards,
Minemas.