Sansui R-30 Receiver Transistor replacements

P

Peter

Guest
Sansui Receiver R-30
Power trannie burnt out in the primary
Traced to shorted output transistors in one channel
BD 203 and BD 204

I replaced them with TIP 31A and TIP 32A
(Also replaced power trannie of course)

After playing for a couple of days the BD 203 and BD 204 in the other
channel went short and took out the mains fuse.
Replaced these with 2 more TIP 31A TIP 32A

Was it bad to leave one channel with BD 203 BD 204 and the other with TIP
31A TIP 32A

Peter
 
snipped:
"Peter" <pmhughes@ozemail.com.au> wrote in message
Was it bad to leave one channel with BD 203 BD 204 and the other with TIP
31A TIP 32A
Peter
------------------------
Click to expand...

NO....... it was not "bad" to leave the old transistors in the other
channel as long as they were good at the time of the repair.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
 
This model is kind of notorious for repeated failures. I would recommend
replacing the bias transistor, and adjusting the bias to about 10 millivolts
as measured across the emitter resistor pair.
Personally I would stick with original type output transistors as well.

Mark Z.


"Peter" <pmhughes@ozemail.com.au> wrote in message
news:TZKVa.316$hz5.6087@nnrp1.ozemail.com.au...
Sansui Receiver R-30
Power trannie burnt out in the primary
Traced to shorted output transistors in one channel
BD 203 and BD 204

I replaced them with TIP 31A and TIP 32A
(Also replaced power trannie of course)

After playing for a couple of days the BD 203 and BD 204 in the other
channel went short and took out the mains fuse.
Replaced these with 2 more TIP 31A TIP 32A

Was it bad to leave one channel with BD 203 BD 204 and the other with TIP
31A TIP 32A

Peter
Click to expand...
 
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