Sansui AU-D907 (AU-919) Repair Part 2 - Preamplifier

This is a continuation from the last video. This video is to share how I use the oscilloscope to troubleshoot the problem of the preamplifier. In the end, It just needed to clean the potentiometer (volume control). Sometime the problem is easy to fix if using the right procedures.

[@pascalphase2556]

A nice repair, it seems you have cleaned it also, it was very dirty...pretty good job ! Bravo from France

[@flamiex.0166]

can you help me how to fix my headphones making noices ?

[@VintageAudioFan]

Please see email for my reply. Thanks.