Adcom GFA 7500 channel problem

G-Rock · 18th May 2005, 07:33 AM

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 don’t see any signs of sizzle. Are there any other internal fuses hiding in there?
I don’t have the tools or knowledge to be measuring parts, taking it to the repair shop will be the last resort.

Thanks for your time,

G

EchoWars · 18th May 2005, 09:51 PM

The output devices for the channel in question are likely toast, and perhaps a few drivers and resistors as well.

It needs surgery...

anatech · 19th May 2005, 02:09 AM

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.

-Chris

18th May 2005, 07:33 AM	#1
G-Rock diyAudio Member Join Date: May 2005 Location: ok	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 don’t see any signs of sizzle. Are there any other internal fuses hiding in there? I don’t have the tools or knowledge to be measuring parts, taking it to the repair shop will be the last resort. Thanks for your time, G

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18th May 2005, 09:51 PM	#2
EchoWars diyAudio Member 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...

19th May 2005, 02:09 AM	#3
anatech diyAudio Moderator 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. -Chris

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