1. SymptomShortly after machine installation (up to 10kp), the inside of the transfer belt are slightlydamaged and the line to the sub-scan (FD) direction (belt conveyance direction) appearsat the corresponding position on the image. (It is remarkable with solid or halftone part)

FD

2. CauseThe inside of transfer belt is rubbed with the steel plate and shaft in the transfer beltunit and damaged. The change of transfer conditions at the damaged part appears asline on the image.

Damaged due to rub

Steel plate

Transfer beltconveyance direction

Shaft

Transfer belt

BUS A03U 010 2411A03U 011 11A03U W10 90A03V 010 52A03U 011 16

BEU A03U 020 1429A03U 120 144A03U WW0 495A03V 020 39

BAU A03U 040 388A03U 070 7A03U 080 27

3. CountermeasureTo reduce the damage while conveying transfer belt:1) Contact point of the steel plate with the transfer belt has been changed to roller type.2) The shaft has been changed to rotational type with much smoother surface.

Transfer belt conveyance direction

4. Serial number cut in for the change

The change has been applied to other spec and bizhub PROC5500 from the outset of the mass production.

5. Actions for MIFBT has established new type part kit as spare part for the usual part order.A03UB50400 Roller/Upper Assy.A03UR7A300 Mounting Plate Assy.When you need, please order these parts.

Changed to roller typeA03UR7A300Mouting Plate/Assy

Rotational shaft with much smoother surfaceA03UB50400 Roller/Upper Assy