Kicker CX1200. 1 no current draw, no output.

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I have a CX1200. 1 and I'm not sure if they are the same curcuit as the cxa1200. 1 and needs the voltage ladder repaired or not. So I could use some guidence on getting this amplifier functioning properly again.
 

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Not sure what's happening with IC16, but start by removing the power supply mosfets,and
measure the DC voltage around the UC3843 using power ground for the black probe. And probe pins 4 and 6 of the 3843 and post results and screenshots.

Once you can establish the rails and +/-15 volts, then we will look at ladder circuit and PWM for output drive.
 
If you look closely you will see that C4 is in fact C47-2nF. C47 and R9-18Kohm are the RC time constant for the UC3843.

This may have damaged the mosfets and Q5-C2045. The safe bet is to replace mosfets and driver along with C47.

Before you replace the mosfets and after you've replaced C47 and Q5. Check the Sawtooth on U16- Pin 3 and drive from pin 6 to the gate resistors.

Whenever replacing timing capacitors always use caps rated COG(NPO), the following Mouser link will work for C47.

C0402C202J3GACTU KEMET | Mouser
 
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