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Old 23rd March 2012, 08:53 AM   #1
glennjarrett is offline glennjarrett  United Kingdom
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Join Date: May 2010
Location: lancashire uk
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Hi i have a pioneer A400 the volume pot has been damaged its a 4 legged dual 100k B x2 the fouth leg is a tap on the track i have put a normal pot in place of the original one which works but there is a gap as you start to turn the volume up ( silence ) then the sound kicks in anyone know where i can get hold of a replacement or modify the amp so a normal pot works across the full volume range any help will be very appreciated.
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Old 23rd March 2012, 11:11 AM   #2
epicyclic is offline epicyclic  United Kingdom
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Join Date: Jan 2012
Schematic with parts list available here :- www.audio-circuit.dk/schematics_o-r.php

Then scroll down to find Pioneer A400.

The pot appears to be a multi purpose linear pot . Use pin 4 to connect to a resistor as they have done to give it a logarithmic effect .

The schematic says its a dual gang 50K tho .

Last edited by epicyclic; 23rd March 2012 at 11:26 AM.
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Old 23rd March 2012, 11:12 AM   #3
AndrewT is offline AndrewT  Scotland
Join Date: Jul 2004
Location: Scottish Borders
Your link does not show the schematic !
regards Andrew T.
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