TFM/15 Help

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Charlie1
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TFM/15 Help

Post by Charlie1 » Thu Aug 14, 2008 6:22 pm

Hello All,
My TFM15CB is acting up. When I turn on I hear a relay click and I'm getting no meter lights or sound, any thoughts or is this like the question, how long is a piece of string?
Thanks
Steve

RichP714
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Re: TFM/15 Help

Post by RichP714 » Thu Aug 14, 2008 7:34 pm

Charlie1 wrote:Hello All,
My TFM15CB is acting up. When I turn on I hear a relay click and I'm getting no meter lights or sound, any thoughts or is this like the question, how long is a piece of string?
Thanks
Steve
Hi there and welcome to the forum!
The good news is if you hear a clicking relay, the amp is passing its power on self test for power supply voltages.

The bad news is I don't have a service manual to help you continue.

Have you tried twiddling the input level knobs?

Charlie1
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Re: TFM/15 Help

Post by Charlie1 » Thu Aug 14, 2008 8:31 pm

Thanks for the reply and welcome Rich. I love my Carver, also have the HR-752 of which I'm the original owner. I've tried everything I know to do, not sure where to start checking or testing.
Steve

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engtaz
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Re: TFM/15 Help

Post by engtaz » Fri Aug 15, 2008 4:25 am

Welcome Charlie1. Good luck and maybe someone can send Rich a copy of the schematics.
engtaz


Carver M4.0T in front channels to Caver AL VI's in SACD & 2 Channel setup
C 16, PT 2400, Slim Device, Carver TX-8, 490T and Rega TT w Grado Gold cart in the 2 channel setup
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RichP714
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Re: TFM/15 Help

Post by RichP714 » Fri Aug 15, 2008 9:53 am

Charlie1 wrote:Thanks for the reply and welcome Rich. I love my Carver, also have the HR-752 of which I'm the original owner. I've tried everything I know to do, not sure where to start checking or testing.
Steve
I sure wish I had a schematic, but I don't. I don't remember if your amp has a magnetic field coil and triac controlled power supply or not (a couple of the lower numbered TFM series were 'regular' transformers).

Messing with a triac controlled unit is dicey for those not familiar; they often destroy the coil and amp and sometimes get injured.

If there IS a triac in there, whatever you do, do not short across it in an attempt to 'jump start' the power supply.

If you're getting that relay click, odds are the power supply is working anyway. Without the schemo, it's hard to say why the meter lamps aren't coming on, let alone why no signal is passing.

Anybody have a schemo for this unit?

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OBI56
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Re: TFM/15 Help

Post by OBI56 » Fri Aug 15, 2008 11:12 am

TFM75 has the service manual in his archives Rich.
Why let facts or common sense get in the way of your opinions.

Charlie1
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Re: TFM/15 Help

Post by Charlie1 » Fri Aug 15, 2008 11:35 am

Hi,
Is ther a way to post a picture?
Thanks
Steve

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OBI56
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Re: TFM/15 Help

Post by OBI56 » Fri Aug 15, 2008 11:53 am

Charlie1 wrote:Hi,
Is ther a way to post a picture?
Thanks
Steve
When you post a new message or edit an existing one, below the text box you will find a section with a blue line header for attachments. Browse for your picture then add it to the file list. Once that is done you simply place your cursor where you want the picture and press Place Inline and you are done! Please keep your pictures under 1000 pixels wide otherwise it screws up the entire thread by forcing people to scroll side to side to read everything.
Last edited by OBI56 on Fri Aug 15, 2008 12:18 pm, edited 1 time in total.
Why let facts or common sense get in the way of your opinions.

RichP714
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Re: TFM/15 Help

Post by RichP714 » Fri Aug 15, 2008 12:11 pm

OBI56 wrote:TFM75 has the service manual in his archives Rich.
Thanks Obi, I'll ask him about it

RichP714
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Re: TFM/15 Help

Post by RichP714 » Fri Aug 15, 2008 2:29 pm

I found one at servicemanuals.net

It's a 'regular' non traic controlled transformer, so any technician can work on it without having to be versed in Carver gear. It's not a rail switcher either, so should be much simpler to fix.

There ARE internal fuses according to the schemo.....give them a look first Three, on the left front side, especially fuse F003, the 1 amp one

Charlie1
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Re: TFM/15 Help

Post by Charlie1 » Fri Aug 15, 2008 2:36 pm

Hi Rich,
Fuses were first thing I looked at. They appear fine and actually on the top side, things are quite clean, I see no visual evidence of overheating at all. Here is a photo, I hope
Steve
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RichP714
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Re: TFM/15 Help

Post by RichP714 » Fri Aug 15, 2008 3:39 pm

What is the unit's history? was it working and then quit, etc.....

How comfortable are you messing around with it and/or what type of test equipment do you have?

Charlie1
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Re: TFM/15 Help

Post by Charlie1 » Sat Aug 16, 2008 9:05 pm

Well she's up and running. Replaced bulbs and noticed a wire that had come loose but yet looked in place.
Thank you all for your help and patience.
Steve

RichP714
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Re: TFM/15 Help

Post by RichP714 » Sat Aug 16, 2008 9:51 pm

Charlie1 wrote:Well she's up and running. Replaced bulbs and noticed a wire that had come loose but yet looked in place.
Thank you all for your help and patience.
Steve
Great news!

Jag_97470
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Re: TFM/15 Help

Post by Jag_97470 » Sun Jul 05, 2009 7:56 pm

Welcome Charlie1! Glad you found your problem, what wire came loose? I'm assuming it was from the fuse board? Good job! and welcome again!

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