"Sidney" wrote in message
m...
Onkyo receiver/amp model:TX-SV313PRO,year:1996 one day the customer
turned the unit on and there was no audio ouput only a burning
smell.Upon troubleshooting I found that the following parts were
defective:

Q507=2SA1695 (was shorted)
Q505=2SC4468 (was shorted)
R515=8.2 ohm,1/4w (visually burnt and somewhat higher resistance)
R531=2.2 K ohm,1/4w (visually burnt)
R519=0.22 ohm,5w dual emitter (cement metal) (open on one end,I think)


There's a .47 ohm resistor at pin 2 of Q501, a uPC1298V, and 2 anothers
nearby. Can't quite make out the locator numbers, the second one shows to
the left of pin 4 in the schematic which I have thoughtfully e-mailed you
:-) , and the third looks like R527 to pin 9. Very possible one of these
resistors is bad or the driver IC is bad.

Mark Z.