Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th May 2003, 09:39 PM   #1
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
Question Adcom Schematic Needed Gfa-545 Ii

Ok, I'm trying to fix an adcom GFA-545 II amp ...I can see 2 caps are blown out, which I can replace if I knew the value. Any layout, schematic, service manual would be great. Anyone? Link? Thanks!

-Matthew K. Olson

if you happen to HAVE a 545, can you look inside it please and let me know the value of cap c605 and c606 (those are the labels on the boards) Thanks ya'll!

-Matthew K. Olson
  Reply With Quote
Old 15th May 2003, 10:01 PM   #2
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
C605 (R) & C606 (L) = 1uF

Arne K

I'll see if I can scan the schematics later....
__________________
Don't believe everything you think...
  Reply With Quote
Old 15th May 2003, 10:14 PM   #3
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
ROCK ON! Thanks so much man...yeah, schematics would be GREAT!

-Matthew K. Olson

mattyo5@aol.com
  Reply With Quote
Old 15th May 2003, 10:40 PM   #4
ojg is online now ojg
diyAudio Member
 
Join Date: May 2003
Location: Norway
Hi!
I own a GFA-2535 and would also like to have the schematic so I can start modding it.
Please, please post it here or e-mail it!
Thanks!!!
  Reply With Quote
Old 16th May 2003, 07:53 PM   #5
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
Ok, I replaced the capacitor and everything else seems to be in order. I'm getting about 56v +- from the power supply, but there is a huge amt of DC on the outputs, like 39v Any fast ideas? There is a bias trimpot, but that doesn't help. Thanks!

-Matthew K. Olson
  Reply With Quote
Old 17th May 2003, 11:25 PM   #6
Arzela is offline Arzela  United States
diyAudio Member
 
Arzela's Avatar
 
Join Date: Mar 2003
Location: Texas
I once needed to replace parts
in a GFP-750. I called up Adcom; they
were very helpful and told me the part typees and values,
  Reply With Quote
Old 18th May 2003, 12:24 AM   #7
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
Thanks Azrela, I think I just need to figure this one out on my own, or gut the thing and use it for something else. The power supply still works fine, but 39v on the speaker outputs sounds like the driver's are shorted or the outputs are shot or something like that. If anyone wants to point me in a more exact direction that'd be great. I already have the schematics from COBRA ...so I know what the parts are. Thanks!

-Matthew K. Olson
  Reply With Quote
Old 12th June 2003, 03:54 PM   #8
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default Hi, Mattyo5

Have you sorted the problem?
My best guess is the output-drivers...

Please let us know if / what you find, and if you manage to tweak it...(read somewhere that someone had a trafo-update for it long time ago, probably more VA, and a few volts up...?).

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 12th June 2003, 03:56 PM   #9
diyAudio Member
 
Join Date: Aug 2002
Location: Farmington, CT
Send a message via AIM to Mattyo5
I actually sent the amp boards to a guy that i know that repairs such things. I'm not getting charged too much for it either. So he's ontop of things. When I get it back I'll try to post on how it sounds

-Matthew K. Olson
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Adcom 5400 schematic needed ctong Solid State 1 4th June 2013 07:25 PM
Adcom GFA-545 II Schematic Needed 1moreamp Solid State 4 18th September 2012 03:11 AM
Adcom GFA 585 Driver PCB needed Fearlessleader1 Parts 1 20th December 2005 09:09 PM
Adcom GFA-585 Parts Needed wilsonmw Parts 2 14th July 2005 05:09 PM
Adcom GFA-585 HELP NEEDED! georgehifi Solid State 19 18th October 2003 02:33 PM


New To Site? Need Help?

All times are GMT. The time now is 07:30 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2