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1 Nov. '87
2-4 E6 FUNCTIONAL DRIVE
- Definition -
. Lights if the CPU receives no pulse from the pulse generator for a 0.7
second interval.
- Possible Causes -
Timing belt broken or out of position
Pulse generator sensor failure
. Main motor failure
Main PCB defective.
- Action -
Does the main motor turn on?
N
Is the main motor conductive?
N
Y
~ Replace the main motor.
Does CN104-4 drop from +24 volts to O volt when "Start" is pressed?
Y
N
Replace the main PCB.
Replace the AC drive PCB.
timing belt broken or out of position?
Y
Replace or reset the timing belt.
Are pulses observed at CN109-3 on the main PCB when the main motor is
turning? (Approx. 1.8 volts with a digital multimeter.)
Y
N
I
Replace the pulse generator sensor.
Replace the main PCB.
4-26
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