Hi to all
The drum is detected by measuring the primary charging roller current . This current generates a voltage that is fed back to the Dc controller. When yhis voltage is "ZERO", the "instal drum" message is displayed. When this happens in the field, verify:
1- The contact of the the drum charging roller.
2- The contact on the machine side.
3- The HV PCB (replace).
4- The DC controller (replace).
5- The wiring between the the HV and the DC controller.
6- The wiring between the HV PCB and the machine rear contact of the drum charging roller.
Rachid.
The drum is detected by measuring the primary charging roller current . This current generates a voltage that is fed back to the Dc controller. When yhis voltage is "ZERO", the "instal drum" message is displayed. When this happens in the field, verify:
1- The contact of the the drum charging roller.
2- The contact on the machine side.
3- The HV PCB (replace).
4- The DC controller (replace).
5- The wiring between the the HV and the DC controller.
6- The wiring between the HV PCB and the machine rear contact of the drum charging roller.
Rachid.