Adcom GFA-5400 Thermal Problem

[MLcubed]

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

[Larry S.]

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!

[SQLGuy]

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.

[Larry S.]

Originally Posted by SQLGuy

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!!