Originally Posted by
Laserbeam
Thank you very much for your contributions!
@ copier tech
I compared the values with those of this service bulletin. All values are in the normal range. All 4 drum-units were renewed in March and still have about 60% of life expectancy. The tranfer belt is overlife about 50K.
Today this problem occured again !!!!!!!!! Developer deficiency in the cyan unit. After about only 2000 copies / printouts. The display shows failure P-21, P-6, P-28 This time I renewed the transfer belt / roller, cleaned the 2 IDC sensors, run Stabilizer (Initialize + Image Stabilization) and performed Gradation Adjustment.
I think, that this issue is a result of a HV board failure and not a problem of overlife drum/developer/transfer belt units. I'm ordering a new one now.
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