Adcom GFA 7500 channel problem - diyAudio
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Old 18th May 2005, 07:33 AM   #1
G-Rock is offline G-Rock  United States
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Join Date: May 2005
Location: ok
Default Adcom GFA 7500 channel problem

First post here, be kind.

Had my center channel unplugged on the speaker side and the wires touched, thought I had the amp turned off.....well I thought wrong. Opened the hood and replaced the fuse (it was fried).
Now the center channel thermal protect light stays illuminated, and still no output on this channel, all the other channels work.

What else can I check? Just looking at the circuit board I donít see any signs of sizzle. Are there any other internal fuses hiding in there?
I donít have the tools or knowledge to be measuring parts, taking it to the repair shop will be the last resort.

Thanks for your time,

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Old 18th May 2005, 09:51 PM   #2
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Join Date: Dec 2002
Location: Left of the Dial
The output devices for the channel in question are likely toast, and perhaps a few drivers and resistors as well.

It needs surgery...
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Old 19th May 2005, 02:09 AM   #3
anatech is offline anatech  Canada
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Join Date: Jun 2004
Location: Georgetown, On
Hi G-Rock,
Do yourself a favour and sent the unit to an authorized warranty repair center . If they mess it up you have recourse from Adcom. Generally you will get a better repair at a cheaper cost at the end of the day.

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