Solution - Konica Minolta bizhub C250P Service Manual

23. Malfunction code
Code
P-22 Color Shift Adjust failure
P-26 1st Image Transfer ATVC (K) failure • An abnormal average value is detected during an
P-27 2nd Image Transfer ATVC failure
P-29 1st Image Transfer ATVC (color)
failure
P-30 Color PC Drum Sensor malfunction • The output from the Color PC Drive Main and Sub Sen-
P-31 Black PC Drum Sensor malfunction • The output from the Black PC Drive Main and Sub Sen-

23.2 Solution

*1: How to check the error sensor
1. Set the Service Jig.
2. Turn the PC Power ON.
3. Turn the Printer Power ON while pressing the Menu/Select key on the control Panel.
4. Keep pressing the Menu/Select key until the LED turns OFF on the control Panel.
5. Check to make sure that the "Trouble Reset" will be displayed on the control Panel after
LED turns OFF.
6. Start the Jig software and check to make sure the Start-up Dialog will be displayed.
7. Click the OK key in the dialogue.
8. Check to make sure that the Start screen will be displayed on the PC.
9. Check to make sure that the Start screen will change to the Panel screen.
10. Click the Utility key.
11. Click the Details key.
12. Click the keys below.
STOP → 0 → 0 → STOP → 0 → 1
13. Service mode will be displayed.
14. Display the Sensor check from the Service mode.
15. Close the front door to run "Stabilizer."
16. During the Stabilizer sequence, check if the values of the phase detection sensors
(Color PC Drive Main/Sub and Black PC Drive Main/Sub Sensors) change.
17. A sensor is faulty if its value does not change.
304
Item
• 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.
• The skew correction amount is greater than the speci-
fied value.
adjustment of the first image transfer ATVC value of
Black.
• An abnormal average value is detected during an
adjustment of the second image transfer ATVC value.
• An abnormal average value is detected during an
adjustment of the first image transfer ATVC value of
color.
sors remains unchanged for a continuous period of
1,000 ms while the Color PC Drum Motor is turning sta-
bly and the Lock signal is active (LOW-0).
sors remains unchanged for a continuous period of
1,000 ms while the Main Motor is turning stably and the
Lock signal is active (LOW-0).
Field Service Ver. 2.0 Mar. 2006
Description