Dorian

Thank you for your warm welcome. I know this isn't the easiest amp to start with but it's here and I have nothing to lose since it cost me nothing appart from my time. But I see this as an opportunity to learn even if it's a fail, at least I tried. I'm located in New Zealand (230V), so there isn't any carver specialist around. I got a multimeter, a signal generator, an oscilloscope and a soldering iron. I also got a friend who design electronic board and keen to explain me or help when I'm in a jam. I checked the service manual but only found how to adjust the bias and also that the amp work by "individual block" (like Jeffs mentioned). I'm mostly looking for informations on how to test those stages (power supply, input board, amp board...). The amp has been cleaned deeply, I visually inspected and didn't see anything suspect appart from some circuit rust on the fan side of the amp board. Channel 1 turn on but the clip light is fixed red (no input connected). And the second channel doesn't turn on. If you have any repair thread regarding the Tfm-75 please let me know. Thank you again for your input.

Thank you for your warm welcome. I know this isn't the easiest amp to start with but it's here and I have nothing to lose since it cost me nothing appart from my time. But I see this as an opportunity to learn even if it's a fail, at least I tried. I located in New Zealand, so there isn't any carver specialist around. I got a multimeter, a signal generator, an oscilloscope and a soldering iron. I also got a friend who design electronic board and keen to explain me or help when I'm in a jam. I checked the service manual but only found how to adjust the bias and also that the amp work by "individual block" (like Jeffs mentioned). I'm mostly looking for informations on how to test those stages (power supply, input board, amp board...). The amp has been cleaned deeply, I visually inspected and didn't see anything suspect appart from some circuit rust on the fan side of the amp board. Channel 1 turn on but the clip light is fixed red (no input connected). And the second channel doesn't turn on, I'm suspecting the black capacitors on the power supply board as I tested the big blue one and they seems fine. If you have any repair thread regarding the Tfm-75 please let me know. Thank you again for your input.

Hi, thanks for letting me join the site. Here is the story: a friend gave me a rack of amps, while most of them where not really in great condition, there was a PT2400 in there. I finally had time to get my hand on it. I gave it a due clean and did some random testing. While some people told me it was a really complicated amp and a really "busy" chassis, I can definitely say that it's well engineered and not overcomplicated to disassembled. However, I'm looking for some guidelines to trouble shoot and attempt to fix it. I did look the manual but doesn't explain in details. Is there a topic related to this? Thank you very much for your help.