Question about Audio Players & Recorders
The 12V regulator has burnt out and I cannot identify what the chip was. The AS7805D and the BM1084ADJ seem O.k. If I had the circuit or one that is similar I might be able to make a substitute.
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Posted on Jan 02, 2017
no parts from a pioneer wont work. There are roughly 4 regulators for the power supply maybe 5. The sad thing is they cost between 7 and 20.00 , he didnt happen to mention which power supply was affected did he? You would have to check the various regulators out of circuit to determine which one is bad. If its a F.E.T they are hard to check without the proper equipment.
Posted on Apr 05, 2008
You have something in short circuit in power supply pattern, so filter coils are burnt. It may be voltage regulator, or regulating transistor, electrolytic capacitor or even shorted diode at pwr. input serving to protect in case of inverse polarity applied. Check all for short. Was it reverse polarity or overvoltage occured?
Posted on Mar 14, 2009
SOURCE: Motherboard broken chip
There is a few of the motherboards that fit your model on the net I saw one for 99 bucks on ebay. You could always use that as a contingency plan. I agree you are halfway there you might as well complete it.
Posted on Mar 25, 2009
Hi Mate, I have the exact same problem, casued by wrong adaptor being connected by accident, did you manage to find what the code is on the IC5 chip ?, I can see NSV, but there is another letter or number before it but cant make it out as that where its burnt.
Posted on Jun 02, 2009
I have repair my supply board by replace the 2 capacitors and 1
mosfet because the 5VDC was failure
the mosfet is a IRFP 150 or similar and capacitors are same models
becarefull the 330ohms resistor dont touch the capacitor
or a great risk of short circuit destroy the 5VDC
jean yves kerfers
Posted on Jan 11, 2010
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