neg2013

14.048

hace 5 años

Good evening, you may solve your problem if you simply download the manual or diagram of the device you are repairing. If I enter the model of the device mentioned, this link is the result I obtained:

neg2013

14.048

hace 5 años

https://elektrotanya.com/sansui_au-3900_stereo_amplifier.pdf/download.html

neg2013

14.048

hace 5 años

Just click on the blue letters, solve the captcha, wait for another page to be generated, wait for it to appear at the bottom of the previous image the words GET MANUAL or GET MANUAL, you must click there and start the download, If you use a desktop PC, those are the steps, now that you use one of those smartphones, well that's another issue, which I hardly know anything about.

Antonio Carmona

66

hace 5 años

Good!
Grateful for your prompt response. I commented that I entered the link that mentions but more additional information is necessary to start the repair since the previous workshop could not repair the faults presented by the equipment and to top it off they lost the volume control.
Again my thanks for your valuable help.

neg2013

14.048

hace 5 años

And without a model it will be difficult to get a similar one, the value is appreciated in the diagram, it is a potentiometer with a double / 250 K derivation Ohms (VR701)

Antonio Carmona

66

hace 5 años

Exactly the same is, now it turns out that this amplifier has the "Loudness" function and the cables of this must be connected to either side of both volume controls and to know this I need additional information that I do not see in the link you mentioned.