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Old 18th September 2012, 12:49 PM   #11
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Short Q2016's base to Q2017's base ?
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Old 18th September 2012, 01:07 PM   #12
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Yes.
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Old 18th September 2012, 01:36 PM   #13
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Shorted the bases The right channel the resistors burn up faster now..

The left channel they burnt up as well and also R1024 and R1025 also burnt up
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Old 18th September 2012, 01:42 PM   #14
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Lift Q2009 and Q2010.

Remove the jumper.

Replace the two 604 ohm resistors. Do the resistors burn?

Does the amp draw excessive current with the bias pot fully counter-clockwise?

Does the bias pot work normally?

Do you have any DC across the speaker terminals for this channel?
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Old 18th September 2012, 02:05 PM   #15
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If i lift Q2009 and Q2010 the resistors no longer burn in that channel..

With the Bias pots fully counter clockwise the amp powers up and idle's perfectly..

Bias pots are working correctly..

I have -0.70 volts measured directly across the speaker terminals for the right channel
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Old 18th September 2012, 02:19 PM   #16
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Do you have the 17v on Rx024 and Rx025?
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Old 18th September 2012, 02:25 PM   #17
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On R2024 i have 0 volts on 1 side and -13.65 volts on the other side

On R2025 i have 43.75 volts on both sides of it
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Old 18th September 2012, 02:40 PM   #18
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What is the DC voltage on all 3 terminals of Q17?
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Old 18th September 2012, 02:49 PM   #19
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Leg 1:40.4
Leg 2:30.2
Leg 3:31.1
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Old 18th September 2012, 03:18 PM   #20
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With the black probe on the ground terminal of the amp, what is the DC voltage on the negative terminal of C35?

Confirm that R63 and R65 are within tolerance.
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