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Old 17th May 2011, 08:01 PM   #21
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Were any of the output transistors shorted? Check all combinations (leg 1 to leg 2, 1-3 and 2-3).
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Old 17th May 2011, 10:28 PM   #22
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I'll check them now

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Old 17th May 2011, 10:45 PM   #23
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OK, some interesting results...

Q201: all combos beep
Q202: pins 2 - 3
Q207: pins 2 - 3
Q208: all combos beep

Q213: pins 2 - 3
Q214: pins 2 - 3
Q219: NIL
Q220: NIL

I know that something is wrong here, can you shed some light on the results?
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Old 18th May 2011, 09:09 AM   #24
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If you get a steady tone (same as touching the probes together) in any combination, the transistor has shorted. This is not good because virtually every time that an output shorts, the driver IC on the driver board fails. This would require quite a bit more time and skill and may be beyond the abilities of someone new to amp repair. If you make one mistake or miss one defective component, all of the outputs could fail the instant that the amp is powered up.

Are you willing to risk destroying multiple sets of outputs?

Are you capable of replacing the surface mount driver IC on the audio driver board?
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