Question about Kenwood VR-309
My VR-309 has recently started to distort and clip the audio being output after it warms up, Usually about 10-15 min. Occasionally when adjusting the volume the sound would be overcome with static while the volume was changing. I found a cold solder joint related to this problem and have not had this issue since fixing. The distortion from the volume knob and the eventual warm up distortion sound identical. I am not sure if they are related
This is a case of one or more transistors breaking down when heated. This can be found usually by using freeze spray to cool down one transistor at a time until the problem clears up. You can narrow this down a bit by determining whether this "noise" is effecgted by the volume control or not. Also, does the problem show up faster when the unit plays louder?
Posted on Aug 29, 2008
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