BIZHUB C450

[Sanchez]

Относительно несведения:
Скорее всего виноват именно датчик петли - если он не работает, фьюзер тянет бумагу быстрее чем ремень переноса

вот что написано на infohub`e

Up to now, we have been reported three types of Color shift problem as follows.

1. About 1mm color shift in YMCK order.
Symptom: YMCK image are shifted about 1mm in YMCK order. This happens in all area of pages evenly. the problem was solved by switch off and on again the main power
Cause: In very few case, MFP fail to reflect color shift adjust value when starting up.

Measure: Apply FW Ver.70GCH(phase1.8 base special FW) or later.

2.Big Color Shift & Enlarged image in feeding direction
Symptom: YMCK image are shifted more than 10mm and image is enlarged in feeding direction.P-5, P28 are displayed.(see attached sample)
Cause: unknown

Measure: refit all LPH unit cables or replace PWB-LPH.

3.Uneven color shift.
Symptom: color shift happens randomly. The value how much color is shifted is not same between pages. It is not even in area all area of pages.
Cause: In correct working of paper loop sensor.
Fusing roller rotation speed becomes higher when loop sensor detects high amount of the loop. Due to defect sensor, fusing roller keeps pulling the paper and this cause uneven rotation of transfer belt unit.

Measure: refit loop sensor and actuator or replace them.
смотреть датчик петли