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Kenwood KA4002 problem
Kenwood KA4002 problem
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Old 19th March 2010, 05:56 PM   #1
dicksolder is offline dicksolder
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Join Date: Mar 2010
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, 09:08 PM   #2
GuusD is offline GuusD
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Join Date: Feb 2012

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, 11:19 PM   #3
smartx21 is offline smartx21  Brazil
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Join Date: Mar 2010
Location: Santiago, RS/ Brasil
Send a message via MSN to smartx21 Kenwood KA4002 problem
You both should read carefully this thread:
vintage amplifier repair/upgrade manual

Last edited by smartx21; 15th February 2012 at 11:27 PM.
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