Marantz PM7000 problem /schematic - diyAudio
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Old 6th May 2007, 06:34 PM   #1
Juko is offline Juko  Netherlands
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Default Marantz PM7000 problem /schematic

Hi

I bought a defect Marantz pm-7000 amp. I narrowed the problem down to the main amp, I think. The pre-amp output sounds ok.

The main amp part looks ok. No burned components. Electrolytic's look fine too.

When I turn the amp on the relays from the power clicks. about 5 secs later only the speakers 1 relays clicks. When I turn the volume very high I hear a very weak sound from the left speaker and some cracking
Speakers 2 connections are not working at all.

What kind of problem could this be? Unfortunately I don't have any schematics.
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Old 5th December 2007, 11:10 AM   #2
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yo go here and download the manual www.audio-circuit.dk

if you havent fixed already
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Old 5th December 2007, 08:06 PM   #3
Juko is offline Juko  Netherlands
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Nope, I didn't. There is a shortcircuit in the power-amp section, but I can't find the cause.

But thanks for the link, looks useful. Although I already got the manual myself from a website in exchange for another one.
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