197
zTroubleshooting Guide
chap.6
(15) Malfunction of Master Feeding Clutch
Cause/Defective section Procedures Item to be checked Result Countermeasure
Regulated power supply
1 NO Replace regulated power supply.
Master feeding clutch 2 YES Check wiring and replace master
feeding clutch.
Drive PCB unit 3 YES Finish.
Main PCB unit NO Check bundled wire and
connectors and replace main
PCB unit.
Does voltage between regulated
power supply +S (+24) and -S (GND)
show 24V?
Does voltage between drive PCB unit
CN9-5 (+) and -6 (GND) show 24V
when master feeding clutch is turned
on?
Is trouble cleared by replacing drive
PCB unit?
(16) Malfunction of Master Stepping Motor
Cause/Defective section Procedures Item to be checked Result Countermeasure
Load on drive system
1 YES Finish.
Regulated power supply 2 NO Replace regulated power supply.
Drive PCB unit 3 YES Finish.
Main PCB unit NO Check bundled wire and
connectors and replace main
PCB unit.
Is trouble cleared by adjusting tension
of the master feeding unit timing belt
or supplying oil to bearing?
Does voltage between regulated
power supply +S (+24) and -S (GND)
show 24V?
Is trouble cleared by replacing drive
PCB unit?
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