Carver TFM-25 tune up

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Jazzman53

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Carver TFM-25 tune up
« on: 30 Oct 2010, 01:53 pm »
Just tuned up the Carver TFM-25 I got on Ebay last week.  It's been burning in for a couple of hours now and it's sounding really sweet.   :thumb: 




Delta Wave

Re: Carver TFM-25 tune up
« Reply #1 on: 30 Oct 2010, 03:56 pm »
Very nice, I still have three - 2x M200t & a M.5t and have always loved how they sound... perhaps I'll do the same.

Speedskater

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Re: Carver TFM-25 tune up
« Reply #2 on: 30 Oct 2010, 04:07 pm »
I have been meaning to tune-up my two TFM-22 amps for some years now.  What did you do? Replace all the electrolytic capacitors with new of about the same value?

Jazzman53

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Re: Carver TFM-25 tune up
« Reply #3 on: 30 Oct 2010, 08:34 pm »
Yes, replaced every electrolytic cap in the amp... not hard to do but a bit tedious.  This was my 4th TFM-25 recap so I have it down pretty well now.  The TFM-22 is identical except it has LED meters instead of wipers.  I have a Digikey recapping parts list if you want it.  I also did the TFM-25-2 Service Bulletin upgrade and I have a parts list for that too.   




 

Jazzman53

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Re: Carver TFM-25 tune up
« Reply #4 on: 30 Oct 2010, 09:10 pm »
I have been meaning to tune-up my two TFM-22 amps for some years now.  What did you do? Replace all the electrolytic capacitors with new of about the same value?


Hi Speedskater,
The link below is a complete write-up with parts lists and photos to recap a TFM-25.  You may need to join the CarverSite to view it.  Members can also download Carver Owner Service Manuals there at no charge.  I did confirm that the TFM-22 and TFM-25 were issued the same Service Bulletin; which is a reliability upgrade that involves changing out some resistors and transistors to prevent overheating and discoloration on certain areas of the main PC board. 

All of the caps shown in my parts list will be common to both the TFM-22 and TFM-25 except possibly C401-402, C405-406, C409-410, C411-414, C415-416 and C451, which are on the meter drive board (different meters used).
  http://thecarversite.com/yetanotherforum/default.aspx?g=posts&t=1683

have a great day! 
Charlie

Speedskater

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Re: Carver TFM-25 tune up
« Reply #5 on: 30 Oct 2010, 09:32 pm »
Thanks Charlie,  I didn't even know about that forum.

Jazzman53

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Re: Carver TFM-25 tune up
« Reply #6 on: 31 Oct 2010, 12:00 pm »
Thanks Charlie,  I didn't even know about that forum.

It's a great site for Carver enthusiasts-- lots of great members and the the guy who runs it (RichP) used to work for Carver Corp doing warranty repairs-- very dedicated... he even walked me thru fixing an amp once.

PDR

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Re: Carver TFM-25 tune up
« Reply #7 on: 31 Oct 2010, 01:51 pm »
It really is a great site.....there are a few of us that are members of both.

SteveFord

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Re: Carver TFM-25 tune up
« Reply #8 on: 6 Nov 2010, 06:53 pm »
If you have Carver or Sunfire gear, that would be the place to go.  There's always someone who is able to help you out if you have a problem.
The feel is similar to this site but a bit looser thanks to miscreants like Balok, PDR, Jazzman53 and Weitrhino. 
I try to keep them under control but it's a losing battle... :D

herb73

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Re: Carver TFM-25 tune up
« Reply #9 on: 16 Nov 2010, 06:02 pm »
I am a newby here, just joined a few min ago..
I have 2 500T amps that I am about to send out to be upgraded..haven't used them in 15 years, but loved the way they USED to sound..
have the c-2 and the tuner as well..
what kind of speakers do u run with your carver amps?
I have an old set of VMPS towers.
Thanx for all the good reading

Jazzman53

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Re: Carver TFM-25 tune up
« Reply #10 on: 12 Dec 2010, 03:30 pm »
I am a newby here, just joined a few min ago..
I have 2 500T amps that I am about to send out to be upgraded..haven't used them in 15 years, but loved the way they USED to sound..
have the c-2 and the tuner as well..
what kind of speakers do u run with your carver amps?
I have an old set of VMPS towers.
Thanx for all the good reading

Hi Herb,
Sorry I didn't answer sooner but I must have missed your post.  Most Carver enthusiasts would die for a pair of M500T's.  Since you asked, I'm bi-amping a pair of homebuilt hybrid electrostats with a pair TFM-25's.  Here's a link to my DIY Electrostatic Loudspeaker web page:
http://jazzman-esl-page.blogspot.com/
 
 

herb73

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Re: Carver TFM-25 tune up
« Reply #11 on: 15 Dec 2010, 06:24 pm »
Thanx jazzman for the info...
I recently picked up a pair of VMPS RM-40 speakers...was wondering how they will sound with the upgraded 500T's...
I prob. won't get them back for another few weeks, but can hardly wait...
Also have a AR SP-0  MK3....
I found anlther M500t for sale on the net...may buy that one, too!..
I have much vinyl, a few cd.s....
will be looking at downloading music off the internet soon...
have never done that before....
H

Indiansprings

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Re: Carver TFM-25 tune up
« Reply #12 on: 23 Jan 2011, 12:17 am »
I could do this to my TFM-24 too couldn't I?

Jazzman53

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Re: Carver TFM-25 tune up
« Reply #13 on: 23 Jan 2011, 03:38 am »
Yes, of course.  I think your TFM-24 is very similar to the TFM-25.  If so, the parts to replace all of the electrolytic caps runs about $55

Frosti

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Re: Carver TFM-25 tune up
« Reply #14 on: 30 Mar 2012, 09:26 pm »
I can't register to the other site, could you send me the parts list? I have the tfm-24 and the right channel has started fuzzing so i would love to get tuning it up soon!

Subhunter

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Re: Carver TFM-25 tune up
« Reply #15 on: 1 Apr 2012, 08:55 pm »
Very nice, I wish I had one.

Mikemaxcel

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Re: Carver TFM-25 tune up
« Reply #16 on: 18 Oct 2012, 08:42 am »

Hi Speedskater,
The link below is a complete write-up with parts lists and photos to recap a TFM-25.  You may need to join the CarverSite to view it.  Members can also download Carver Owner Service Manuals there at no charge.  I did confirm that the TFM-22 and TFM-25 were issued the same Service Bulletin; which is a reliability upgrade that involves changing out some resistors and transistors to prevent overheating and discoloration on certain areas of the main PC board. 

All of the caps shown in my parts list will be common to both the TFM-22 and TFM-25 except possibly C401-402, C405-406, C409-410, C411-414, C415-416 and C451, which are on the meter drive board (different meters used).
  http://thecarversite.com/yetanotherforum/default.aspx?g=posts&t=1683

have a great day! 
Charlie

Would you mind share the details of components changed found in `service bulletin update`?
As I am just about to have the TFM25 next week.

SteveFord

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Re: Carver TFM-25 tune up
« Reply #17 on: 18 Oct 2012, 10:40 pm »
TFM-25 RECAP PARTS LIST:
 
Carver #             Qty   Desc.               Manufacturer #   Digikey #        Spacing  TFM-25 Component          Price                     
 
76R3TW221M-RT    2    220µF 6.3v          UPW0J221MED    493-1699-ND    2.5       C109-C110                          $0.36   $0.72
 
NS-50TW 4R7M    5   4.7µF 50v     EEU-EB1H4R7S   P13465-ND     2    C205-C206, C409-C410   $0.11   $0.55
 
NS100TW 1R0M    4   1µF  100v     UPW2A010MDD    493-1962-ND   2    C211-C214              $0.33   $1.32
 
NS-25TW 470M    8   47µF 25v      EEU-EB1E470    P12123-ND     2    C307-C308, C415-C416   $0.16   $1.28

NS-25TW 220M    1   22µF 25v      UPW1E220MDD    493-1811-ND   2    C309                   $0.32   $0.32
 
NS-25TW 330M    1   33µF 25v      UPW1E330MDD    493-1814-ND   2    C310                   $0.32   $0.32
 
NS-50TW R47M    1  .47µF 50v      UPW1HR47MDD    493-1885-ND   2    C311                   $0.34   $0.34   

NS-16TW 220M    4  22µF 16v       UPW1C220MDD    493-1769-ND   2    C401-C402, C405-C406   $0.34   $1.36
 
NS-16TW 101M    4  100µf 16v      UTT1C101MDD    493-3271-ND        C411-C414              $0.47   $1.88
 
NS-25TW 100M    1  10µF 25v       UPW1E100MDD    493-1809-ND   2    C451                   $0.34   $0.34
 
BC00103NN60GH   2  10000µF 100v   ECE-T2AP103EA  P10038-ND    22.5  C501-C502             $11.96  $23.92

BC63332N240HC   2  3300µF 63v     ECO-S1JA332BA  P7481-ND      10   C503-C504              $4.79   $9.58

BC35682M240HC   2  6800µF 35 v    ECO-S1VA682BA  P6660-ND      10   C505-C506              $4.11   $8.22

NS-35TW 471M-KF 1  470µF 35v      UHE1V471MPD    493-1582-ND   5    C509                   $0.66   $0.66
 
NS-50TW1R0M     1  1µF 50v        UPW1H010MDD    493-1886-ND   2    C510                   $0.30   $0.30
 
                                                                                          Total   $51.11
 
 
 
TFM-25-2 SERVICE BULLETIN PARTS LIST 1 of 2 -  RESISTORS:
 
 
 
Carver #    Qty         Description              Digikey #             TFM-25 Comp.   Price           Total 
 
REPLACED     2 (buy 5)   62Ω, 1/2 W Carbon        62H-ND                     R209-R212            $0.058            $0.29                     
 

REPLACED     2                1.5KΩ, 1/4W Carbon     CF1/41.5KJRCT-ND    R229-R230             $0.08              $0.16
 
REPLACED     2                22Ω, 1/2W Carbon        CF1/222JRCT-ND       R243-R244             $0.14              $0.28                       

REPLACED     2 (buy 5)    27Ω, 1/2W Carbon         27H-ND                     R245-R246           $0.058             $0.29                       

Note: Verify R235-R238 are 27Ω, 1/2 watt resistors-- if not, add these to order.                                                                                                                                                                                                                    Total         $1.02   
 
 
 
 
 
TFM-25-2 SERVICE BULLETIN BULLETIN PARTS LIST 2 of 2 - TRANSISTORS:

Carver Number       Qty       Description            B&D Enterprises #       TFM-25 Component                Cost          Total       

2SA1370-E,F            4         Sanyo                   2SA1370                      Q201-Q202, Q209-Q210       $0.53         $1.06
 
2SC3467-E,F            4         Sanyo                   2SC3467                      Q203-Q204, Q207-Q208      $0.39         $0.78
 
                                                                                                                                                    *Total     $1.84 
 
* Minimum Order amount is $15

Jazzman53

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Re: Carver TFM-25 tune up
« Reply #18 on: 19 Oct 2012, 12:46 am »
TFM-25 RECAP PARTS LIST:
 
Carver #             Qty   Desc.               Manufacturer #   Digikey #        Spacing  TFM-25 Component          Price                     
 
76R3TW221M-RT    2    220µF 6.3v          UPW0J221MED    493-1699-ND    2.5       C109-C110                          $0.36   $0.72
 
NS-50TW 4R7M    5   4.7µF 50v     EEU-EB1H4R7S   P13465-ND     2    C205-C206, C409-C410   $0.11   $0.55
 
NS100TW 1R0M    4   1µF  100v     UPW2A010MDD    493-1962-ND   2    C211-C214              $0.33   $1.32
 
NS-25TW 470M    8   47µF 25v      EEU-EB1E470    P12123-ND     2    C307-C308, C415-C416   $0.16   $1.28

NS-25TW 220M    1   22µF 25v      UPW1E220MDD    493-1811-ND   2    C309                   $0.32   $0.32
 
NS-25TW 330M    1   33µF 25v      UPW1E330MDD    493-1814-ND   2    C310                   $0.32   $0.32
 
NS-50TW R47M    1  .47µF 50v      UPW1HR47MDD    493-1885-ND   2    C311                   $0.34   $0.34   

NS-16TW 220M    4  22µF 16v       UPW1C220MDD    493-1769-ND   2    C401-C402, C405-C406   $0.34   $1.36
 
NS-16TW 101M    4  100µf 16v      UTT1C101MDD    493-3271-ND        C411-C414              $0.47   $1.88
 
NS-25TW 100M    1  10µF 25v       UPW1E100MDD    493-1809-ND   2    C451                   $0.34   $0.34
 
BC00103NN60GH   2  10000µF 100v   ECE-T2AP103EA  P10038-ND    22.5  C501-C502             $11.96  $23.92

BC63332N240HC   2  3300µF 63v     ECO-S1JA332BA  P7481-ND      10   C503-C504              $4.79   $9.58

BC35682M240HC   2  6800µF 35 v    ECO-S1VA682BA  P6660-ND      10   C505-C506              $4.11   $8.22

NS-35TW 471M-KF 1  470µF 35v      UHE1V471MPD    493-1582-ND   5    C509                   $0.66   $0.66
 
NS-50TW1R0M     1  1µF 50v        UPW1H010MDD    493-1886-ND   2    C510                   $0.30   $0.30
 
                                                                                          Total   $51.11
 
 
 
TFM-25-2 SERVICE BULLETIN PARTS LIST 1 of 2 -  RESISTORS:
 
 
 
Carver #    Qty         Description              Digikey #             TFM-25 Comp.   Price           Total 
 
REPLACED     2 (buy 5)   62Ω, 1/2 W Carbon        62H-ND                     R209-R212            $0.058            $0.29                     
 

REPLACED     2                1.5KΩ, 1/4W Carbon     CF1/41.5KJRCT-ND    R229-R230             $0.08              $0.16
 
REPLACED     2                22Ω, 1/2W Carbon        CF1/222JRCT-ND       R243-R244             $0.14              $0.28                       

REPLACED     2 (buy 5)    27Ω, 1/2W Carbon         27H-ND                     R245-R246           $0.058             $0.29                       

Note: Verify R235-R238 are 27Ω, 1/2 watt resistors-- if not, add these to order.                                                                                                                                                                                                                    Total         $1.02   
 
 
 
 
 
TFM-25-2 SERVICE BULLETIN BULLETIN PARTS LIST 2 of 2 - TRANSISTORS:

Carver Number       Qty       Description            B&D Enterprises #       TFM-25 Component                Cost          Total       

2SA1370-E,F            4         Sanyo                   2SA1370                      Q201-Q202, Q209-Q210       $0.53         $1.06
 
2SC3467-E,F            4         Sanyo                   2SC3467                      Q203-Q204, Q207-Q208      $0.39         $0.78
 
                                                                                                                                                    *Total     $1.84 
 
* Minimum Order amount is $15




Thanks for posting that Steve,

If I'm not mistaken that's probably the cap/hotlist that BillD and I posted when I refurb'd my 25's.   I should point out that the TMF25-2 Service Bulletin actually calls out 1/4 watt flame proof resistors for the 62 Ohm R209-R212, 22 Ohm R243-R245, and 27 Ohm R245-R246.  However, I was unable to find any 1/4 watt flame proofs anywhere so I substituted 1/2 watt non-flame proof resistors in my parts list.  They work fine of course, but to the extent that these resistors could also serve as fuses; blowing open to protect other parts downstream in the event of a damaging current spike,  I would go with 1/4 watt flame-proofs if you can find them.   

Also, for those two big 10,000uF power supply caps, the stock height caps were not available at the time so I used the Digikey #P10038-ND caps, as shown in the cap list above.   These caps are quite a bit taller than the stock caps but do fit with 3/16" clearance to the amp cover (not a problem... just don't stack any bricks on top of the amp).  The preferred stock size caps are Digikey #P10040-ND.

Jazz     

Mikemaxcel

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Re: Carver TFM-25 tune up
« Reply #19 on: 19 Oct 2012, 08:45 pm »
The detailed information really help.
Thank you.

Hopefully I might get a pair of these in bridged-mode to drive my ATC SCM20Pro in the near future.