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 Post subject: Jim Dutridge:
PostPosted: Aug Tue 04, 2009 9:08 pm 
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Joined: Apr Sat 18, 2009 9:34 pm
Posts: 6
Location: DeLeon Springs,FL
Now that I have the schematic and service manual for the Harman-Kardon AVR20-ll I have a bigger problem.

I have traced the problem to a chip on the Volume PCB6 board. One of the chips (IC601 - KIA4559P ) is defective and I have not been able to find a replacement. I am told that they are no longer produced.

Any suggestions?
Bill Nordmann


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 Post subject:
PostPosted: Aug Tue 04, 2009 9:34 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 8219
Location: Toledo, Ohio
Bill, I'm best served for research at work so I'll look into your problem tommorrow.

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Jim
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"AC volts and DC volts and little lamps and lities..."


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 Post subject:
PostPosted: Aug Wed 05, 2009 7:52 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 8219
Location: Toledo, Ohio
Damn Bill, I totally had a brainfart on this. Promise to check tommorrow. Even drew a string around my finger.

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Jim
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"AC volts and DC volts and little lamps and lities..."


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 Post subject:
PostPosted: Aug Wed 05, 2009 9:02 pm 
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Joined: Apr Sat 18, 2009 9:34 pm
Posts: 6
Location: DeLeon Springs,FL
Jim Dutridge:
No Problem. I finally heard back from Harman-Kardon again and they told me that the part IS available. So I immediately ordered one from them. Strange, because all it is, is a dual inline Op Amp.
Don't know why it was so hard to find.

Anyway, thanks for your efforts!

Bill Nordmann


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 Post subject:
PostPosted: Aug Wed 05, 2009 9:24 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 8219
Location: Toledo, Ohio
Ok Bill.

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Jim
------------------------
"AC volts and DC volts and little lamps and lities..."


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 Post subject:
PostPosted: Aug Wed 05, 2009 10:21 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 10691
Location: Baltimore, MD, USA
Bill Nordmann wrote:
...it is, is a dual inline Op Amp.
Don't know why it was so hard to find....


And most likely a very common IC with a different number?

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Don


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 Post subject:
PostPosted: Aug Sat 08, 2009 9:28 pm 
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Joined: Apr Sat 18, 2009 9:34 pm
Posts: 6
Location: DeLeon Springs,FL
Don:
The part substituted is NJM4559D. Don't understand why my supplier had such a hard time identifying this substitute, but I'm glad I now have it.
Thanks.


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 Post subject:
PostPosted: Aug Sat 08, 2009 9:38 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 8219
Location: Toledo, Ohio
WOW, don't know why I didn't recognioze the number. Must have been having a senior moment :(

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Jim
------------------------
"AC volts and DC volts and little lamps and lities..."


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