Bizhub c224 black dev eating

[pern2808]

Hi all, scratching my head on this one. Have a C224e which has been eating dev over the last 6 weeks. Have replaced both drum and dev unit. Genuine parts and genuine toner being used. No error codes. Have replaced HV board also. Runs fine for about 5 days then dev is depleted. Have run stabilisation and get a weird pattern on the black test scan patter. Printing is fine though until dev runs down. Any ideas as on 2nd dev unit now and customer has called agin today saying the low dev pattern is appearing again on prints/ copies. Machine has been cleaned, checked contacts. Has had a new transfer belt recently but hasnt coincided withdev depletion. Help!! Thanks in advance.

[Synthohol]

have a look at these.

[copyman]

If any of the Dev and/or drums are over life you will have to replace them. "Any" dev unit can dump if one of the other drum or dev units are over life.

[jamesyboy]

erase lamps would pull dev if faulty

[G6token]

Been having the same issue on a c454 with Magenta, changed 3 devolping units 2 drums performed value adjustments and Within a few days the DV is dry. I’m wondering if a voltage issue occurred within the building due to an on going renovation, the copier is placed causin some damage to the HV power board. The machine was not on any electronic protector just plugged right in the wall outlet. Confused

[Synthohol]

keep in mind, if you dont use OEM toner you are also killing the units.
but check the bushings in the ENG document