Adcom GFA 5400 Schematic (Service Manual)

Archived from groups: rec.audio.high-end (More info?)

Can anyone point me to a schematic for the Adcom GFA 5400 power amp? I'm
trying to track down the source of some severe distortion I'm hearing from
both channels.

Thanks
Kofi

Archived from groups: rec.audio.high-end (More info?)

Thanks, Scott. They charge $25 for the service manual with schematic (mail
or e-mail). What does the service manual contain?

Yes, you can get very far repairing an amp with a schematic and voltmeter.
I've also found that most parts may be obtained for much less from
mouser.com or any of the other online electronics parts suppliers (digikey,
newark, etc)

Kofi

"Scott Drysdale" <s.drysdale@verizon.net> wrote in message
newsd8rvp02dnn@news4.newsguy.com...
> On 6 Aug 2005 15:17:34 GMT, "Kofi Anim-Appiah"
> <partialresponse@comcast.net> wrote:
>
> >Can anyone point me to a schematic for the Adcom GFA 5400 power amp? I'm
> >trying to track down the source of some severe distortion I'm hearing
from
> >both channels.
>
> try http://www.adcom.com/contactinfo.htm. i got schematics for my
> GTP500 and GFA5800. haven't asked for the GDA700 schematics (yet).
> as i recall, there was a small fee.
>
> i fried the 5800's power supply by dropping a probe onto the circuit
> board (!). i was trying to find out why one channel's fan was running
> at a different speed than the other, but it turns out that's normal.
> at the time, the 5800 service manual didn't exist, so they faxed me
> the relevant schematics, i used them to find the toasted parts,
> ordered parts from adcom, and was back up and running in less than a
> week. adcom was still in NJ at the time, and i was in eastern PA.
> they said if i wanted to i could drive over there with the amp and
> they'd fix it while i waited, which was very cool - but my theory is
> if i killed it, i should fix it.
> --
> // scott drysdale // s.drysdale@verizon.net
> // amigas and panheads and guns, oh my!