[TechAssist] Re: Pioneer Receiver RX-510 -parts ID, please

Thanks for the input, Marty. I know what you mean by chain reaction. I
worked on a Sony receiver a while back and they had the strangest
circuitry. There were about 7 or 8 small transistor 2SA988's all blown.

Anyway, on this unit I already had all the parts delivered by the time
you wrote, so I installed everything and now the unit has been running
fine for a few days now. You are correct in the fact that it took a
while to complete this repair. I had to thoroughly inspect every part on
the amp board. Found a few 1/4 W resistors open besides these glass
diodes and driver and output transistors. The dual emitter resistor in
the right channel was also open (2x 0.27 ohm 5W). Also went over 2/3 of
the board with solder. For once in a long while something worked for me
when I first plugged it in after repair. RELIEF!


Gary McCartney

McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: number63@xxxxxxxxxxxxx



19th Street Audio <audio19@xxxxxxxx> wrote:
> 
> I have found that repairing those amps can be very time consuming and often
> times unreliable.
> The complete boards are available with outputs attached for reasonable
> amounts from Pioneer.
> When those amps blow it seems to cause a chain reaction throughout the
> circuitry.
> Unstable at best.
> 
> Marty Mertz
> 19th Street Audio
> 532 N. 19th Street
> Allentown, Pa. 18104
> audio19@xxxxxxxx
> 610-434-8833
> 
> ----- Original Message -----
> From: Gary McCartney <number63@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, April 26, 2002 9:42 AM
> Subject: [TechAssist] Pioneer Receiver RX-510 -parts ID, please
> 
> >
> > This is  a Pioneer receiver, model RX-510. It's one of those cube boxes
> > with built in cassette player.
> > I'm replacing a lot of parts in the power amp section and there are 3
> > litle glass diodes, D704, D706, D708 which don't have any numbers on
> > them. I am assuming they are similar to 1N4148 but lately I've got
> > myself in trouble for assuming what diode to use and ended up buggering
> > up a VCR power supply. So being cautious, I'd appreciate if anyone can
> > tell me what diodes I require here.
> >
> > Any help appreciated.
> > --
> >
> >
> >
> > Gary McCartney
> >
> > McCartney Electronics
> > 7134 Fife Rd, RR 7
> > Guelph Ontario Canada N1H 6J4
> > Fax: (519)821-1530
> > email: number63@xxxxxxxxxxxxx
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