TFM-25 needing repair

If you have Carver repair questions, or can help other users with repairs, this is the place for it
Post Reply
User avatar
homerjsimpson
Newbie
Posts: 20
Joined: Tue Oct 21, 2008 12:21 pm
Location: RALEIGH, NC

TFM-25 needing repair

Post by homerjsimpson » Sun Feb 14, 2010 9:02 am

I am in the process of picking up a Carver TFM-25. It plays fine at low volumes but gets a little distorted and tinny at high volumes. Is this easily fixable? I know it has been mostly recapped. Prolly not been adjusted. I do not think any of the service bulletin updates have been done either.

Where can i get the Service Bulletins and the Service manual?

Thoughts ?

User avatar
BillD
R.I.P. Friend
R.I.P. Friend
Posts: 7126
Joined: Wed Jun 06, 2007 8:29 pm
Location: The west's most mid-western town, Scottsdale, Arizona

Re: TFM-25 needing repair

Post by BillD » Sun Feb 14, 2010 9:19 am

Start looking HERE
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer

User avatar
homerjsimpson
Newbie
Posts: 20
Joined: Tue Oct 21, 2008 12:21 pm
Location: RALEIGH, NC

Re: TFM-25 needing repair

Post by homerjsimpson » Sun Feb 14, 2010 9:24 am

Thank you, I found that and a few other helpful posts. I can easily do the service bulletin updates. I just want to make sure it will be easily fixable by me. Just want to make sure its not bad outputs etc...

User avatar
homerjsimpson
Newbie
Posts: 20
Joined: Tue Oct 21, 2008 12:21 pm
Location: RALEIGH, NC

Re: TFM-25 needing repair

Post by homerjsimpson » Sun Feb 14, 2010 9:28 am

I have found the Service Manual. !!!

User avatar
BillD
R.I.P. Friend
R.I.P. Friend
Posts: 7126
Joined: Wed Jun 06, 2007 8:29 pm
Location: The west's most mid-western town, Scottsdale, Arizona

Re: TFM-25 needing repair

Post by BillD » Sun Feb 14, 2010 10:40 am

See, all good things come to those who search.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer

User avatar
homerjsimpson
Newbie
Posts: 20
Joined: Tue Oct 21, 2008 12:21 pm
Location: RALEIGH, NC

Re: TFM-25 needing repair

Post by homerjsimpson » Thu Apr 01, 2010 6:21 pm

Well I put in the new transistors per the service manual. However, it is still not right. It will randomly go in and out of protection. On one channel the dc off set is perfect. On the other it is around 350mv. Also I can not seem to adjust either Idle current. When I connect the meter to the test points, it is exactly 0 on both channels. Guess it's back to the drawing board....

gunner64
Newbie
Posts: 42
Joined: Sun Mar 14, 2010 11:57 am
Location: Dubuque,Iowa

Re: TFM-25 needing repair

Post by gunner64 » Fri Apr 02, 2010 11:12 am

Hi,I had a problem With my TFM-45 with not being able to get bias voltage at the test point due to the adjustment Pot being dirty,and some bad solder joints on the amp boards around the bias pots(especially the Pot/board connection itself)Try a little deoxit on the Pots,and touch up any solder joints that look suspect.I've never worked on a TFM-25 so I can't be specific to your amplifier,But I did this to my 45 when was experiencing a similar problem and These steps solved the problem completely,bias is rock steady now.Hope this helps.Good luck!!!!
Robert

User avatar
homerjsimpson
Newbie
Posts: 20
Joined: Tue Oct 21, 2008 12:21 pm
Location: RALEIGH, NC

Re: TFM-25 needing repair

Post by homerjsimpson » Fri Apr 02, 2010 8:38 pm

Thanks for the tips, I'll give them both a try...

Post Reply

Return to “CARVER Equipment Repair/Help Forum”