- 2,8VDC unreliable, fluctuating
- Strange sound from the power supply coils
- Check 12VDC supply line, terminal lugs
- Check terminal brackets for cracks and bad
contact to the PCB.
- Check 2,8VDC for stability
- Check the PWM control signal from the controller to
see if the duty cycle fluctuates significantly.
- Rework supply device, replace the Molex
- Rework solder joints in any case with a good deal
of heat and flux.