Mtx ta92001 distorted output.

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Here's the readings it power on then With it powerd off.
 

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That should have disconnected all drive from the opto-couplers. You can confirm by measuring the DC voltage between the diode pins of the couplers. They should remain at 0v when the amp is on.

One of the opto-couplers may be leaking. You need to remove them AND install a jumper between pin 5 and 6/7 on each one. Don't apply power without the jumper. Do you still have significant DC?
 
All opto-couplers show on pin 2&3 .243 volts but it fluctuates between .243 and 0 volts. I set my oscilloscope to diode function.3 of the 4 opto-couplers on pin 2 and 3 show 0L. One of the opto-couplers shows 0.005. I will be pulling the opto-couplers out that show 0L out now and jump pins 5 and 6/7
 
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