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In Reply to: RE: Hmmm posted by Roypercy on October 18, 2016 at 18:31:44
Do any of the .22 ohm resistors look burned? If you have a voltmeter, check the DC voltages to ground on the fuses that blew. Looks like 10 output transistors per channel, separate windings and associated protection and rectification diodes for each channel. You might have gotten lucky and diode went before the output transistors, or some outputs failed and one of the diodes...
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10 output transistors!!! Wow. If you blow one are you going to have to buy a matched set of 10 new ones?
Good question. Times have changed, semiconductor processes have improved, variances are typically a lot less. Order the same brand as the transistors that are in there and you should be fine. This isn't universally true, but the service manual for this amplifier is very good and there is nothing noted about selecting or matching these devices.
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