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Help Identifying Diode
Help Identifying Diode
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Old 12th September 2007, 06:05 AM   #11
OzMikeH is offline OzMikeH  Australia
diyAudio Member
Join Date: Mar 2007
Diodes used like that are to exploit the volt drop across them, it is to provide a low impedance way to get a 0.7V drop for the bias of the power transistors. The PN junction in the transistors is also about 0.7V

The good news: any old standard diode should work provided the current rating is suitable. (no schottkys/high speed, just a dumb ol diode)
The bad news: usually the diode is killed by a shorted transistor.
while you have the diode tester out look for a shorted Base-emitter or base-collector on one or more transistors.

When powering up for testing use safety resistors, (see elliot sound products webpage for tips)
Help some guys with funny hair bang two rocks together really hard.
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Old 12th September 2007, 06:28 AM   #12
ashwick is offline ashwick  India
diyAudio Member
Join Date: Aug 2007
Thanks again
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