Power transistor for YBA Integre Amp

[Tedd Doda]

Hi guys:

A customer (actually a friend) dropped in his YBA Integre audio
amp because he shorted the left speakers while doing some house
cleaning.

All four of the power transistors for the left channel are E-C shorted
and the power supply fuse blew. I lifted all 12 leads from the
transistors
off the board, and the right channel works fine. The signal to the
base
connectors show a healthy signal, so it looks like the drivers are
fine.

It looks to use a pair of NPN and a pair of PNP transistors for each
channel. Of course the manufacturer ground off the ID of the
transistors.

Anyone know what the original and/or replacement transistors are?

Thanks,
--
Tedd Doda VE3TJD

remove: lose.this. to reply directly.

 

[Sofie]

Tedd Doda:
If you are not able to get any more information about the OEM parts, you can
make a reasonable generic substitution in the same case style if you can
determine whether the transistors are darlingtons or not...... a quick meter
test with the good transistors on the other channel will determine that.....
then of course you need to look at the max C-E voltage, and a good
guesstimate about the power/watts.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
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"Tedd Doda" <tdoda21@lose.this.rogers.com> wrote in message
news:nurR1rKS7zEK-pn2-zj4Sb1Zdfkfu@lazer...

Hi guys:

A customer (actually a friend) dropped in his YBA Integre audio
amp because he shorted the left speakers while doing some house
cleaning.

All four of the power transistors for the left channel are E-C shorted
and the power supply fuse blew. I lifted all 12 leads from the
transistors
off the board, and the right channel works fine. The signal to the
base
connectors show a healthy signal, so it looks like the drivers are
fine.

It looks to use a pair of NPN and a pair of PNP transistors for each
channel. Of course the manufacturer ground off the ID of the
transistors.

Anyone know what the original and/or replacement transistors are?

Thanks,
--
Tedd Doda VE3TJD

remove: lose.this. to reply directly.