Ricoh FT8880 Service Manual page 97

5 June 1992
1. SYSTEM ERROR AND SERVICE CALL
CONDITIONS
SC700 - RDH Feed Motor Overload
Definition:
The RDH main control PCB cannot detect any pulses from the feed motor
encoder within 50 msec after the feed motor is activated.
Points to check:
•
Mechanical interference with the feed motor
•
Feed motor
•
Fuse 102 on the RDH main control PCB
•
RDH main control PCB
SC701 - RDH Belt Drive Motor Overload
Definition:
The RDH main control PCB cannot detect any pulses from the belt drive
motor encoder within 50 msec after the belt drive motor is activated.
Points to check:
•
Mechanical interference with the belt drive motor
•
Belt drive motor
•
Fuse 104 on the RDH main control PCB
•
RDH main control PCB
SC702 - RDH Inverter Motor Overload
Definition:
The RDH main control PCB cannot detect any pulses from the inverter motor
encoder within 50 msec after the inverter motor is activated.
Points to check:
•
Mechanical interference with the inverter motor
•
Inverter motor
•
Fuse 103 on the RDH main control PCB
•
RDH main control PCB
SYSTEM ERROR AND SERVICE CALL CONDITIONS
6-1