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Old 15th March 2006, 01:45 PM   #1
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Default Pioneer A-757 schematics

I am looking for the Pioneer A-757 schematics (or service manual), does anyone have it ?

I will be forever greatful !

Thanks
Liviu
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Old 15th March 2006, 02:58 PM   #2
Leolabs is offline Leolabs  Malaysia
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Any problem with it???
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Old 15th March 2006, 05:12 PM   #3
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Actually, no. The thing seems to be built for ever (I know it's not)

Someone suggested me a few tuning/upgrade ideas and i am willing to try, but not "blindly". Modifications range from changing a few capacitors to replacing the whole power modules. Without the schematic, I can't really appreciate if it is worth it or not. The PCB is considered to be a weak point of the amp, as being too "messy" with lots of straps, so it is difficult to retrieve the schematics from the PCB.

Specificallly, a capacitor in the negative feedback loop has been mentioned (the one between the inverting input of the differential input stage to the ground). Changing this to a non-electrolityc one shoud improve sound.

I am new to this forum, maybe there are people that did some tuning to "stock" amplifiers here ?
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Old 15th March 2006, 06:15 PM   #4
CBS240 is offline CBS240  United States
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If by tuning you mean replacing worn out cheap stock parts with newer hi quality parts, then yes. People do this all the time with cars too. Scematic would be helpful.
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