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homertooties 12th November 2006 08:22 AM

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.

Jan Dupont 12th November 2006 09:07 AM

If you post the pics it will be a lot easier :D

homertooties 12th November 2006 09:34 AM

pioneer pics
this time maybe

homertooties 12th November 2006 09:38 AM

more pics

homertooties 12th November 2006 09:40 AM

homertooties 12th November 2006 09:42 AM

homertooties 12th November 2006 09:44 AM

Gold_xyz 12th November 2006 10:00 AM

O.T. It uses the function macro to focus better ! ;)

homertooties 12th November 2006 10:00 AM

more pics of pioneer with parts refitted

homertooties 12th November 2006 10:01 AM

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