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Old 13th August 2012, 05:56 PM   #21
DREW028 is offline DREW028  United States
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I removed all power supply fets for the sub channel hoping the other channels would work but they did not. The gates were only getting around 1.5v (sub and 4 channel).
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Old 13th August 2012, 10:08 PM   #22
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Using a multimeter to determine if the gate voltage is as it should be will not provide definitive results. Many amps will read less than 1v when working perfectly and producing the target rail voltage, especially when the supply is regulated.

Do you have rail voltage on the output transistors for the other channels?
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Old 14th August 2012, 03:39 AM   #23
DREW028 is offline DREW028  United States
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Yes there is voltage. On the sub channel, ( power supply FETs are in 2 pairs of 2) one of the gate resistors is bad and the signal isnt getting to the transistor. This most likely caused the other transistor to fail??

The rear channels are working but the fronts are not.
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Old 15th August 2012, 12:02 AM   #24
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If it's using FETs and the gate resistor failed, the FET is defective.

Have you tried operating all of the controls through their entire range to see if the 2 dead channels would produce audio?
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Old 24th January 2013, 11:00 AM   #25
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I have the same amplifier but it goes into protect modevascsoon as power andvremote are powered. Idid some basic trouble shooting and everything checks out. I
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