Konica Minolta bizhub C200 Service Manual page 325

17. Malfunction code
Code
P-21 Color regist test pattern failure
P-22 Color regist adjust failure
P-27 Secondary transfer ATVC failure
17.2 Solution
17.2.1 P-5: IDC sensor (front) failure
17.2.2 P-28 IDC sensor (rear) failure
IDC registration sensor/MK (IDCS/MK)
IDC registration sensor/YC (IDCS/YC)
Step
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.
Reinstall or reconnect IDCS/MK or IDCS/YC, sensor shutter or connector, if it is installed or con-
3
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.
Open/close the front door, run an image stabilization sequence, and select [State Confirmation]
→ [Level History] to check the IDC value.
6
IDC1: IDCS/MK, IDC2: IDCS/CY
If the value is 1.0 V or less, change IDCS/MK or IDCS/CY.
7 Change PRCB.
286
Item
• 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.
• 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.
• An abnormal average value is detected during an
adjustment of the second image transfer ATVC value.
Relevant parts
Field Service Ver. 1.0 Jun. 2008
Description
Printer control board (PRCB)
High voltage unit (HV)
Transfer belt unit
Action