DR #22 - Carver M-1.0t Power Amplifier Troubleshooting and Repair - No Power

In this video, I document the troubleshooting and repair of a Carver M-1.0t power amplifier with no power. I miss the target a few times but ultimately find the issue and get this amp working again.

[@notfamous3802]

This is as much fun as watching a good detective movie. I really appreciate how you walk us through your errors and the logic you use to work through the problem. Brilliant.

[@wossname1952]

Nick, I am always blown away at your ability to zero in on the problem area with systematic thoroughness. You always deliver, your doggedness is inspiring!

[@johnfriedmann2413]

I have several units of Carver equipment and I just love them! Well made and easy to work on. 5 different Amps, 3 pre-amps and a couple of Tuners. Great vid. Thanks.

[@saarike]

Interesting failure symptoms, but the failure itself was quite common in the power rail. Thanks for interesting vid.

[@stevenmetz5363]

I came here looking for a carver review only to quickly learn thats not what this was. I watched anyway and thank you for being detailed. My carver will arrive tomorrow

[@daffyduxxx]

Great fault finding, I'd admire your perseverance.

[@davidzrout530]

Same amp. Seems like I’m chasing the same issue. Thank you for this!

[@PurpleDreki]

Beautiful amp! Carver did not skimp on the output stage! All those transistors!

[@wheatonna]

So helpful. Thank you for giving me the confidence to peek under the hood.

[@JuanGarcia-kv7yv]

Great video. Short, informative and to the point. Two 👍👍 up!!

[@fiveangle]

I have one of these that I have to crack open and embark on a similar adventure. Thanks for the great vid !

[@konohh]

Cool, well done and very good documented.

[@maninblack7464]

Really enjoying your diagnostic approach. Could you explain how you go about checking some of the components as you work through your repair. Keep up the good work.

[@Stolzing]

Muy buena reparación. Saludos

[@BigEightiesNewWave]

I had one back in the 90s Was awesome , wished I still had it and my casket-sized Polk Ti speakers and Velodyne 15 inch powered sub.

[@MultiRay67]

Nice amp,and nice fix,love your work,wish i was that smart,i am still trying to fix mine standby transformer of mine Denon amp,but still no luck,probleby an easy fix for you.sorry for mine bad englisch.

[@A5cension]

How would one learn this type of skill? Any good books that someone can recommend?

[@antigen4]

but why would that one bridge rectifier bring down all the other rails (i noticed two other independent circuits)?

[@Rajaee2]

It's a great amplifier

[@misterbonzoid5623]

Complete failures are always simpler to diagnose than distortions or intermittents.

[@aurelioislas5152]

No tiene potenciometro para control de volumen?hace años vi uno asi pero no pregunte porque no trae control como los demas....saludos

[@roroseppel2077]

Interesting video ! How did you do the triac test at 11:45 ? Was the amp isolated ? Or the scope isolated from the mains ?

[@dualityrepair4770]

One of the main terminals is tied to neutral. I don’t remember which (MT1 or MT2). I connected my probe’s ground lead to that and the signal lead to the other triac terminal.

[@jebrehbaker8613]

I've got a TFM 45 that needs a bit of work.

[@abssy22ali27]

Hello Can you describe the repair of the Mackie m1400 or m1200 power amplifier?

[@dualityrepair4770]

Do you have a specific failure? If so, I could take a look at the schematic and get back to you.

[@mrkattm]

Is the audio out of sync with the video?

[@STWILDERNESSADVENTURES]

Excellent video! Detailed and explanatory! I subscribed to your channel and I am waiting for your new videos, I hope it is the same excellent! Thank you!

[@antigen4]

a dim bulb tester might have caught this right away, no?

[@doofwop]

noticed the meter wasn't working at the end when you said everything was working as it should, just saying

[@GustavoAReyes-bc1vc]

The amp must be putting out at about 3-5 watts for the meter to show some action. To hit the upper ones, the sound is now pretty high and uncomfortable. For normal listening, I only see the lower (indicating ON) leds.

[@jeffm2787]

Got a short, must be a cap. Odd smell, must be a cap. Fuse blown, must be a cap. Wife is being a B, must be a cap.

[@OrganNLou]

Carver was certainly a novel designer, but I was never taken by the Carver sound.

[@doofwop]

ok

[@OrganNLou]

Me neither, im sure the tube stuff sounded good though.