17. Malfunction code Field Service Ver. 1.0 Jun. 2008
286
Troubleshooting
17.2 Solution
17.2.1 P-5: IDC sensor (front) failure
17.2.2 P-28 IDC sensor (rear) failure
P-21 Color regist test pattern failure • The number of points detected in the main scan direc-
tion is more or less than the specified value during
main scan direction registration correction.
• The number of points detected in the sub scan direction
is more or less than the specified value during sub scan
direction registration correction.
P-22 Color regist adjust failure
• The color shift amount is greater than the specified
range during main scan direction registration correction.
• The color shift amount is greater than the specified
range during sub scan direction registration correction.
• On the color shift test pattern, the maximum and mini-
mum deviations detected in the main and sub scan
directions go over the predetermined value.
P-27 Secondary transfer ATVC failure • An abnormal average value is detected during an
adjustment of the second image transfer ATVC value.
Code Item Description
Relevant parts
IDC registration sensor/MK (IDCS/MK)
IDC registration sensor/YC (IDCS/YC)
Printer control board (PRCB)
High voltage unit (HV)
Transfer belt unit
Step Action
1 Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2 Change the image transfer belt unit if the transfer belt is damaged.
3
Reinstall or reconnect IDCS/MK or IDCS/YC, sensor shutter or connector, if it is installed or con-
nected improperly.
4 Clean IDCS/MK or IDCS/YC if it is dirty.
5 Check the HV connector for proper connection and correct as necessary.
6
Open/close the front door, run an image stabilization sequence, and select [State Confirmation]
o [Level History] to check the IDC value.
IDC1: IDCS/MK, IDC2: IDCS/CY
If the value is 1.0 V or less, change IDCS/MK or IDCS/CY.
7 Change PRCB.
d-Color MF201
Service Manual Y109660-1
d-Color MF201
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