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Old 19th March 2010, 04:56 PM   #1
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Default Kenwood KA4002 problem

I've got a 30 odd year old Kenwoon KA4002 amplifier with the following problem: the left signal goes dead most of the time presumably due to a hot connection because if you give the amp a slight knock it works fine. The problem gradually became worse over time and now the left signal is dead most of the time.

Any ideas on where to start looking for the problem? Where can I find circuit diagrams for this amp to start debugging?
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Old 14th February 2012, 08:08 PM   #2
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My KA4002 which I bought in 1976, has exactly the same problem in the left channel.
Have you managed to repair yours and do you want to share the solution with me ?
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Old 15th February 2012, 10:19 PM   #3
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Location: Santiago, RS/ Brasil
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You both should read carefully this thread:
vintage amplifier repair/upgrade manual

Last edited by smartx21; 15th February 2012 at 10:27 PM.
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