Carver TFM-42 noise

Osarion
Osarion Posts: 181
edited August 2010 in Troubleshooting
Hey guys, when I turn on my amp I get a loud humming noise. The volume of the noise goes up and down, but it's pretty loud overall. I switched it out with a tfm-25 I have and the problem is gone so I know it's the amp.

So the question is, is there anything I can check? If not I'll have to put it away for a while as I can't afford to have it serviced anytime soon. Thanks in advance for any help/advice. Chris
Post edited by Osarion on
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Comments

  • F1nut
    F1nut Posts: 50,552
    edited August 2010
    Probably a power supply related issue. Unless you know what you are doing, have the schematics and various test equipment, there's nothing you can service yourself.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • snow
    snow Posts: 4,337
    edited August 2010
    Jesse is almost certainly right on the money, but just in the off chance it could be a ground hum issue if the power cord has a 3 prong male end try a cheater plug just to see if that could be the issue.

    REGARDS SNOW
    Well, I just pulled off the impossible by doing a double-blind comparison all by myself, purely by virtue of the fact that I completely and stupidly forgot what I did last. I guess that getting old does have its advantages after all :D
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  • pitdogg2
    pitdogg2 Posts: 25,441
    edited August 2010
    no need for the cheater adapter the TFM42/45 only have a 2 prong plug. Could also be one of the cap's is bad my TFM45 had a buzz that when sent to service was a bad cap I had them replace all that shared the same circuit as the bad one
    my .02
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  • Osarion
    Osarion Posts: 181
    edited August 2010
    I guess it's off to the closet for a while. Thanks for the replies everyone.
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  • ohskigod
    ohskigod Posts: 6,502
    edited August 2010
    my tfm42 buzzes on turn on but only on turn on, it's gotta be a cap or something....it will be going to get service when it finally goes. it sounds like it is time for yours. search on here, I know someone here knows where to send it......boys?

    definitly worth it to get serviced!!!!!
    Living Room 2 Channel -
    Schiit SYS Passive Pre. Jolida CD player. Songbird streamer. California Audio Labs Sigma II DAC, DIY 300as1/a1 Ice modules Class D amp. LSi15 with MM842 woofer upgrade, Nordost Blue Heaven and Unity interconnects.

    Upstairs 2 Channel Rig -
    Prometheus Ref. TVC passive pre, SAE A-205 Amp, Wiim pro streamer and Topping E50 DAC, California Audio Labs DX1 CD player, Von Schweikert VR3.5 speakers.

    Studio Rig - Scarlett 18i20(Gen3) DAW, Mac Mini, Aiyma A07 Max (BridgedX2), Totem Mites
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  • Osarion
    Osarion Posts: 181
    edited August 2010
    This amp was serviced at Rita's by the previous owner last June and had some caps and resistors replaced and a few other internal touch ups. Just missed the one year warranty haha. It's worse than a hum, It's like a loud feedback sound. Not the high pitched screeching feedback but still feedback sounding. This is with or without the preamp on and with or without music playing. Of course I didn't screw with it too long out of fear of damaging my speakers.

    Either way Ohskigod, I always see people being referred to Rita's for Carver service. http://http://www.ritasvintageaudio.net/
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  • ohskigod
    ohskigod Posts: 6,502
    edited August 2010
    Osarion wrote: »
    This amp was serviced at Rita's by the previous owner last June and had some caps and resistors replaced and a few other internal touch ups. Just missed the one year warranty haha. It's worse than a hum, It's like a loud feedback sound. Not the high pitched screeching feedback but still feedback sounding. This is with or without the preamp on and with or without music playing. Of course I didn't screw with it too long out of fear of damaging my speakers.

    Either way Ohskigod, I always see people being referred to Rita's for Carver service. http://http://www.ritasvintageaudio.net/


    yep, sounds familiar.. havent heard n instance where one ws sen then went south......wierd. even so, still gotta get it fixed....where else you gonna get an amp like that for the price of the repair?

    keep us posted bud.
    Living Room 2 Channel -
    Schiit SYS Passive Pre. Jolida CD player. Songbird streamer. California Audio Labs Sigma II DAC, DIY 300as1/a1 Ice modules Class D amp. LSi15 with MM842 woofer upgrade, Nordost Blue Heaven and Unity interconnects.

    Upstairs 2 Channel Rig -
    Prometheus Ref. TVC passive pre, SAE A-205 Amp, Wiim pro streamer and Topping E50 DAC, California Audio Labs DX1 CD player, Von Schweikert VR3.5 speakers.

    Studio Rig - Scarlett 18i20(Gen3) DAW, Mac Mini, Aiyma A07 Max (BridgedX2), Totem Mites
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  • F1nut
    F1nut Posts: 50,552
    edited August 2010
    Try Rolland at Hi-Tech Audio Ltd.
    2125 SW 19th St.
    Gresham Oregon 97080
    503-618-7605 Fax 503-674-8593
    http://www.carveraudiorepair.com

    I believe he charges a little more, but he's got orginal parts that no one else has and from what I hear, he does a better repair job.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • pitdogg2
    pitdogg2 Posts: 25,441
    edited August 2010
    Jesse is correct Rita is good but she just does not get as deep into it as Roland will. I have had some to Rita more than once for the same problem shipping is not cheap and my time without my gear is BS. Roland will do it right the first time with the finest parts which just might be way better that OEM. You hear it on here all the time a lot has changed in the Cap making for the better in the last 25-30 yrs.
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  • thsmith
    thsmith Posts: 6,082
    edited August 2010
    F1nut wrote: »
    Try Rolland at Hi-Tech Audio Ltd.
    2125 SW 19th St.
    Gresham Oregon 97080
    503-618-7605 Fax 503-674-8593
    http://www.carveraudiorepair.com

    I believe he charges a little more, but he's got orginal parts that no one else has and from what I hear, he does a better repair job.

    +1


    I have used Rolland twice and in both cases very happy with the work.

    I am not so sure that Rita's prices are any cheaper now but I always felt better sending my stuff to Rolland.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs
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  • treitz3
    treitz3 Posts: 19,029
    edited August 2010
    Try switching the polarity of the plug.
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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