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Old 29th January 2006, 11:34 AM   #1
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Question schematic to marantz pm140

Anyone has a schematic to a marantz pm140 amplifier ?

I am struggling to get the tone controls to work with another amp, but all i get is controls doing the opposite of how they are marked, loads of bass and a hot amplifier.

In the marantz the controls were the NFB loop or atleast part of it.

Anyone got a schemo for this thing ?

I have searched the web but came up emty handed.

What if i replace the amps existing nfb loop with the tone control circuit, would that make it work better ?
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Old 29th January 2006, 12:54 PM   #2
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Nevermind. I got it working.
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Old 29th January 2006, 08:31 PM   #3
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Turned out i need the schematic anyway.

The controls works but introduces a barely hearable difference.

Anyone got a schematic for marantz pm140 amp ?
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Old 30th January 2006, 09:19 AM   #4
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Noone ?

I need the schemo and im kinda in a hurry, i need it NOW.
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Old 30th January 2006, 07:29 PM   #5
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I guess i can forget about asking for stuff like this here then
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Old 31st January 2006, 03:14 AM   #6
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try this:www.eserviceinfo.com
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Old 31st January 2006, 10:36 AM   #7
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Checked that already, they had nothing.
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