bizhub c451,c 550,minolta c650 trouble

March 28, 2009

Jam in DF611:

-on 2-nd side:

Check  mylar on the 2nd transport guide plate.

Replace the damaged mylar  p/n :  9J07 4703 01

-on 1st side:

  • put the tension spring of feed roller  in lower position.
  • ckech the sensors inside DF611 case and use some adhesive (super glue, super bond) so that the sensors cases will be hard-set.

P21 warning :


- color shift in main scan direction
the amount of color shift is different between front and back side. Color shift occurs at 1 to 2 mm in the worst position.

bizhub C650/C550/C451 (FW Ver.6B only)

The problem will be observed when below 2 conditions meet. However it is not always but it depends on the gain of image density sensor (IDC).
1. When MFP returns from sleep mode within 8 hours from the last image stabilization.
2. In case MFP detects temperature change in printer head at more than 2 degrees from the last regist control when returning from sleep mode.

 

<Cause>
Regist control, which takes place in above condition,  is carried out with improper sensor gain setting.
- P-21 is displayed when the sensor gain is low for the MFP to detect toner pattern.
- Color shift occurs when MFP miss-detect toner pattern due to improper gain setting.

 How to recover the problem:

 

-Apply FW Ver.6M or later

- Turn off/on the main switch
- Carrying out image stabilization 


Written by admin · Filed Under Troubleshooting 

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