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1st August, 1994
Symptom: Hot Roller Down (Error Code 9-22)
This error occurs in any of the following conditions:
Standby mode: If the fusing lamp takes more than 40 s to reach 80 °C (sub-code 01)
Standby mode: If the fusing lamp is accidentally disconnected for more than 15 s (sub-
code 06)
During printing: If the fusing lamp takes more than 30 s to rise to 150 °C from 80 °C (sub-
code 02)
During printing: If the fusing lamp stays below 150 °C for more than 10 s (sub-code 04)
During printing: If the thermistor is accidentally disconnected (sub-code 07)
After printing: If the fusing lamp takes more than 10 minutes to fall back to 150 °C (sub-
code 03)
At any time: If the fusing lamp temperature reaches 280 °C (sub-code 05)
Check
Is the fusing unit thermistor disconnected (FCU CN30)?
Is the thermistor open or shorted? If so replace it. Otherwise clean it.
Replace the fusing lamp if it is open circuit.
Replace the thermostat if it is broken.
Replace the FCU or PSU.
Replace the front cover interlock switch if it does not pass + 24V from the PSU to the
FCU.
Symptom: Mirror Motor Locked (Error Code 9-23)
This error occurs in either of the following conditions:
• If FCU CN9-2 does not go low within 10 s of the hexagonal mirror motor being switched
on (sub-code 21)
• If FCU CN9-2 goes back to high for 10 s or more during hexagonal mirror motor
operation (sub-code 22)
Check
1. Check the connections through the machine between the PSU, FCU, interlock switches,
hexagonal mirror motor and laser diode unit.
2. Does the FCU receive
+ 24V from the PSU?
3. Does the FCU send
+ 24V to the motor?
Symptom: Main Motor Locked (Error Code 9-24)
This error occurs in either of the following conditions:
• If FCU CN22-4 does not go low within 10 s of the main motor being switched on (sub-
code 11)
• If FCU CN22-4 goes back to high for 10 s or more during main motor operation (sub-
code 12)
Check
1. Check that the mechanism is not obstructed.
2. Does the front cover
interlock switch pass
+ 24V?
Action if Yes
Action if Yes
Go to step 3.
Replace the motor and
driver.
Action if Yes
Replace the FCU or the
main motor.
6-20
TROUBLESHOOTING
SERVICE CALL CONDITIONS
Action if No
Action if No
Change the PSU or the front
cover interlock switch.
Replace the FCU.
Action if No
Replace the defective switch
mechanism.
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Troubleshooting
