17. Malfunction code Field Service Ver. 1.0 Jun. 2008
288
Troubleshooting
17.2.8 P-12: Black PC drive sensor malfunction
*1: Faulty sensor check procedure
1. Open the front door and turn ON the main power switch of the machine.
2. Call the [Sensor Check] screen to the screen by way of Service Mode.
For details how to display, see “Adjustment /Setting.”
See P.256
3. Close the front door and start [Stabilization].
4. During the stabilization sequence, check to see if the values of the phase detection
sensors (black PC drive main/sub sensors) change.
5. A sensor is faulty if its value does not change.
17.2.9 P-21: Color regist test pattern failure
17.2.10 P-22: Color regist adjust failure
Relevant parts
Black PC drive main sensor (PS16)
Black PC drive sub sensor (PS18)
Main drive unit
Printer control board (PRCB)
Step Action
1 Perform the faulty sensor check procedure. *1
2
Check the sensor, for which a faulty condition has been checked, for installed position and
proper connector connection.
3 Wipe the sensor, for which a faulty condition has been checked, clean of dirt if any.
4 If P-12 persists, change the main drive unit.
5 Change PRCB.
Relevant parts
Transfer belt unit
PH unit
Printer control board (PRCB)
Step Action
1 Check the flat cable for proper connection and correct as necessary.
2 Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
3 Change the image transfer belt unit if the transfer belt is damaged.
4 Change the PH unit.
5 Change PRCB.
Relevant parts
IDC registration sensor /MK (IDCS/MK)
IDC registration sensor/CY (IDCS/CY)
Printer control board (PRCB)
Step Action
1 Slide out the imaging unit and reinstall it in position.
2 Reinstall or reconnect IDCS/MK or IDCS/CY if it is installed or connected improperly.
3 Check the vertical transport guide for installed position and correct as necessary.
4 Change PRCB.
d-Color MF201
Service Manual Y109660-1
d-Color MF201
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