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Old 2nd August 2012, 12:10 PM   #21
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Location: Florence, Alabama
He said it would pulse with rcas hooked up and rumble when unhooked
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Old 3rd August 2012, 01:09 AM   #22
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Quote:
Originally Posted by Perry Babin View Post
Counting from the op-amp end of the driver board, pin 6 should have nearly rail voltage during the mute delay and then drop to near ground when the mute delay ends.

Is this what you see?

How long does it take from the time that remote voltage is applied until the voltage on that pin drops to near ground?
about 3 secoonds it drops to between 10v and 12v then back up to rail voltage fluctuating from 66v to 90 v
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Old 3rd August 2012, 05:37 AM   #23
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Between the time that the power supply powers up (producing rail voltage) and the end of the 3-second delay, is there DC present on the speaker terminals?
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Old 3rd August 2012, 08:38 AM   #24
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yes dc voltage is present
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Old 3rd August 2012, 11:22 AM   #25
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Check Q43 on the driver board. It may be leaky. You'll have to remove it to check it.
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Old 3rd August 2012, 09:36 PM   #26
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Q43 checked good out of circuit . powered up amp with Q43 out of circuit it wasnt in protect
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Old 3rd August 2012, 09:43 PM   #27
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Old 4th August 2012, 07:18 AM   #28
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Is Q44 in parallel with Q43? If so, remove it and check it.
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Old 4th August 2012, 08:09 AM   #29
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Does pin 6 go from +rail voltage to ground and remain at ground now (with Q43 out of the circuit)?
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Old 4th August 2012, 08:02 PM   #30
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pin 6 reads less than 1 volt with Q43 out of circuit , going to remove Q44 now and check it
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