•The high DC voltage on the feedback line (If Q861 or
Q862 shorted) might damage the PWM ICs. (The
picture shows center channel only, the other
channels are similar.)
•When MOSFETs are shorted, there is a high
probability for the driver IC to be damaged also, and
the Gate (47 Ohm) resistor to be burnt out.
•You could quick check the MOSFETs 14 outputs and
2 Amp B+/- and 7 diodes without removing the PCB.
•When checking the 7 diodes, select the DIODE
MODE on multimeter, minus (negative) probe
contacts pin14 of CN222; plus (positive) probe
contact pin 2/4/6/8 of CN251 and CN262 respectively.
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