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Old 12th November 2006, 08:22 AM   #1
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Default i have some pics of unwell pioneer

Here are some pics of the pioneer there are parts missing out of the board which i have done to test,i took all the relays out because the rapid clicking got annoying after a while.

The 2 grey resistors are okay,1.2 k and 1.8 k these drop the volts from 39 vdc to 30 vdc ,+ and - ,then they are drop again for preamp stages through the psu at the side of the 2 15000mf psu caps,preamp rails being +16vdc and - 12.5vdc.

there has been a repair on this amp before there are 4 teapo caps 10mf 100v which have been put in a zener diode by the side of the left psu cap was bust im guessing it is 33v because there is another on - rail.

All of these parts are in the supply to the left of the main psu caps,apologies for rubbish pics.

I really need some help on this one as soon as you press the direct button on front panel amp stays on.............

Any help would be fantastic.
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Old 12th November 2006, 09:07 AM   #2
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If you post the pics it will be a lot easier
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Old 12th November 2006, 09:34 AM   #3
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Default pioneer pics

this time maybeClick the image to open in full size.
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Old 12th November 2006, 09:38 AM   #4
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Default more pics

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Old 12th November 2006, 09:40 AM   #5
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Old 12th November 2006, 09:42 AM   #6
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Old 12th November 2006, 09:44 AM   #7
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Old 12th November 2006, 10:00 AM   #8
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Old 12th November 2006, 10:00 AM   #9
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Default more pics of pioneer with parts refitted

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Old 12th November 2006, 10:01 AM   #10
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