Symptom: Fusing Unit Failure (Error Code 9-22)
2. Check if ac power is supplied to the lamp from the PSU or not.
- If yes, go to step 3.
- If no, replace the PSU.
3. Check if FDU CN12-1 and/or FDU CN12-2 stays low during printing.
- If yes, replace the PSU, FDU, or FCE.
- If no, check the connection from the PSU to the lamp.
Sub-code 08:
1. Check for any defects in the machine, and replace the defective parts.
If any damage could not be found, go to step 2.
2. Check if the thermistor is shorted or not.
- If yes, replace the thermistor.
- If no, try replacing the FDU and/or FCE
Sub-code 09:
1. Check the connection between the FDU (CN25) and the thermistor.
Symptom: Polygonal Mirror Motor Failure (Error Code 9-23)
This error occurs in either of the following conditions:
•
If FDU CN14-4 does not go low within 10 s of the polygonal mirror motor being
switched on (sub-code 31)
•
If FDU CN14-4 goes back to high for 3 s or more during polygonal mirror motor opera-
tion (sub-code 32)
Check
Action if Yes
Action if No
1. Check the connection between the FDU (CN14) and the polygonal mirror motor.
2. Check that +24VM from
the FDU (CN14-1) is sup-
plied to the polygonal mir-
ror motor.
Replace the polygonal
mirror motor.
Replace the FDU.
If the problem still remains,
replace the FCE.
Symptom: Main Motor Failure (Error Code 9-24)
This error occurs in either of the following conditions:
•
If FDU CN15-4 does not go low within 10 s of the main motor being switched on (sub-
code 41)
•
If FDU CN15-4 goes back to high for 3 s or more during main motor operation (sub-
code 42)
Check
Action if Yes
Action if No
1. Check that the main motor drive mechanism is not obstructed.
2. Check that all the main motor drive gears are correctly installed.
3. Replace the main motor.
Does the problem still re-
main?
Replace the FDU.
If the problem still occurs,
replace the FCE.
May 22nd, 1995
TROUBLESHOOTING
SERVICE CALL CONDITIONS
6-31