Adcom GFA-5400 Thermal Problem - diyAudio
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Old 18th December 2009, 10:44 PM   #1
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Default Adcom GFA-5400 Thermal Problem

Hello,
I would like some help in fixing a thermal problem with a Adcom GFA-5400.

Does anyone know a part number or Digikey # for the thermal switch between heatsink and PCB?
Any advice on ordering from Adcom?

Any advice on repairing this? It looks like a complete disassembly.

I have ordered the service manual off www.stereomanuals.com
Does this have part #'s?

The left channel will not play. The left thermal protection LED is on. The Thermal switch is open.

Adcom GFA 5400
copyright 1995 from PCB X-1232A03T
Serial: A541FB 05295

Thanks, Blair Sutton
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Old 12th January 2010, 03:47 PM   #2
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Default Adcom 5400 Thermal Protection Led.

Hello Blair,
Any luck with your problem? On my 5400 the LED Thermal Protection
light is on the right side. It stays on for about 1/2 hour then turns off
and both speakers play. Then when I turn off the system the LED
light turns on again after the amp cools. I took the cover off and checked
for dust and looked at the internal fuses. I am just wondering if this is
something I can live with or will it get worse! So long for now!
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Old 12th January 2010, 06:26 PM   #3
SQLGuy is offline SQLGuy  United States
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If the thermal switch is stuck open (i.e. it's staying open even though the amp is off and entirely cooled down), you can try a trick we used to do working on laser printers: freeze the hell out of it with freeze spray, and see if it closes back up again.
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Old 12th January 2010, 09:45 PM   #4
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Default SQLGuy vs. Adcom5400.

Quote:
Originally Posted by SQLGuy View Post
If the thermal switch is stuck open (i.e. it's staying open even though the amp is off and entirely cooled down), you can try a trick we used to do working on laser printers: freeze the hell out of it with freeze spray, and see if it closes back up again.
Great! A possible solution. I will try to track down some freeze spray, but
I would not know where to use it! I would have to get my hands on a manual.
Thank you very much for your help! It is a shame that there is no reset
switch! That would be to easy!!
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