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My Harmon Kardon AVR 220 Shuts off after less than ten minutes

My neighbour has given me his old Harman Kardon AVR220 A/V
Receiver. He knew that there was a problem with it but
thought that it would be an easy fix that I could do myself.
I have searched online for some solutions but I was unable to
find an exact match to my problem.

My Problem is: I have the receiver set up in my livingroom
on a surge protector. The receiver shuts off after less than
ten minutes. After it shuts off, if I put my hand on the
top, it is very hot to the touch (too hot to keep my hand on
it for over 10 seconds). I thought that it may be
overheating, so I placed a household fan beside it blowing
into the slots in the side to cool it off. I then powered it
back on and it still shuts off after less than 10 minutes.

The following are some possible solutions that I have read
for similar problems. I am looking for solutions that I
could do on my own as the unit is no longer under warranty
and I do not have a steady income for any expensive servicing
(I am a high school student with a newspaper route).

1) Check for exposed and touching speaker wire (I have
checked and this is not the case in my situation)

2) Open up the unit and check the fuse and the power supply
circuit for black "burned" parts.

3) Open up the unit and check the wire that runs from the
heat sink to the bias (I'm not sure what the bias is [is it
the processor?])
If anybody has any solutions, please post them. Also, if you know that any of the above solutions will or will not work, please let me know.
Thank you so much in advance,
Kyle Mills

Posted by on

  • ky_m_guy Jan 03, 2009

    how do I do that

  • ky_m_guy Jan 03, 2009

    DRUMBANGER: How do I go about checking the board for short circuits? What does a short circuit look like?

    Thanks in advance


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It sounds to me like solder overflow (from getting too hot) is shorting out the circut board! Chech the board for short circuts

Posted on Jan 03, 2009

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