Ricoh FT6645 Manual page 359

12 April 1993
1.5 OPTICS THERMISTOR
SC190 - Optics thermistor open
Definition: [level: D]
The optics thermistor is open.
Possible causes:
•
Optics thermistor open
NOTE: When the optics thermistor is shorted, no SC code is indicated.
The exhaust fan rotates quickly and continuously.
SC191 - Scanner motor thermistor open
Definition: [level: D]
The scanner motor thermistor is open.
Possible causes:
•
Scanner drive motor defective
1.6 MAIN CHARGE
SC302 - Charge corona leakage
Definition: [level: D]
The charge power pack detects a charge corona leakage (output: 0V) for 4.8
msec, or detects the output to be more than 7 kV, 10 times in one job.
Possible causes:
•
Main charge corona unit defective
•
Main charge power pack defective
•
High voltage control board defective
SC303 - Charge corona wire cleaner failure
Definition: [level: C]
The current of the charge corona wire cleaner drive motor is over the
specified current within 4 seconds after the cleaner motor starts.
The charge corona wire cleaner does not move back to the end block within
30 seconds.
Possible causes:
•
Charge corona wire cleaner drive motor defective
•
Insufficient lubrication for the charge corona wire cleaner drive
mechanism (G501 grease)
•
High voltage control board defective
SERVICE CALL CONDITIONS
6-7