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  1. #1

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    Default Help with Carver TFM-25

    Just picked up a Carver TFM-25 and the left channel sounds very scratchy.

    It's constant. Where should I begin?

    thanks
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  2. #2

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    Most likely the power rail voltage needs to be adjusted or a transitor is hot or a cap is leaking or bulging.

    carveraudio.com forum or Rolland at Hi-Tech or Rita.
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  3. #3

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    The amp needs to be serviced if you have ruled out all other components in your rig, including cables.
    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.

    "The best way to enjoy digital music reproduction is to never listen to good analogue reproduction". - Kenneth Swauger

  4. #4

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    The amp is the only thing new to the setup, I simply replaced the NAD 214 with the Carver.

    I already knew it needs service, that is why I asked where to begin, otherwise it'd be working.

    My main questions were what to look for in the amp itself, such as thsmith was pointing me to. I looked inside and there are no bulging caps, none leaking or burnt. It looks like the distortion is coming from the input stage. When you turn up the volume past 1/4 or even close, the amp goes into protect mode. If I pull the left channel connection from the input stage the to amp stage, the issue goes away - no protect mode. I swapped the right channel connection to the left amplifier and it plays clean. This leads me to believe there is a bad component or connection on the input stage PCB. Since this PCB is removable I believe it should be easily serviced. There aren't that many components on it and I believe in 4hr or less anyone handy with a soldering iron can replace all the components (i am not handy with one).

    Is there something I should look for on this pcb specifically?

    thanks
    Main Surround -
    Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub

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    Some of the earlier TFM-25s were bad about the transistor solder connections. Hope this helps.
    >
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    Your pretty good with circuits tuan, I think your going to fix that thing.
    Most people just listen to music and watch movies . I am glad to be a part of a select group that tries to take our auditory and visual senses to a higher level: we EXPERIENCE them.... GOT SDA?...GOT SUNFIRE? ...GOT Maggies?

  7. #7

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    Quote Originally Posted by Polkersince85 View Post
    Some of the earlier TFM-25s were bad about the transistor solder connections. Hope this helps.
    On the input stage PCB?

    If so I'll resolder them, there aren't many.
    Main Surround -
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    Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD

  8. #8

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    Anyone in the club good with fixing Carver amps? TFM LINE?
    Main system:
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  9. #9

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    There is only one place that I send Carver gear to: http://www.hitechaudioltd.com/ Talk to Rolland.

  10. #10

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    Cool. Thanks. I'll give em a call next week.
    Main system:
    Denon PRA-1500, Denon POA-2400, Denon TU-660, Denon DCD-2560, Denon DVD-2910, Denon DRS-640, Denon DP-30L II w/DL-301 mc cart, BSR EQ-3000, DCM Timeframe 600's

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