have you ever checked power diodes
that thay check ok but still not work.
ive had that also with transistors as well.
thay can check out ok but can have
probs when power applied.

"John" wrote in message
net.ca...
How do you check a bridge rectifier in circuit to be absolutely sure it
needs replacing. Conditions: No power applied as 2amp fuse in the
transformer primary blows immediately power is applied. Usual short
circuit
procedures followed throughout but I don't place too much reliance on this
test . BTW, the rectifier (B40 C3200/2200)) is in a theatre organ
purchased
from an outfit no longer in business and space on the pcb is at a premium
and discourages using single diodes.
Thanks - John