PROBABLE CAUSES:
1.The developer drive belt has fallen off, so the agitator drive gear does not turn.
Reinstall and adjust the tension of the drive belt for the agitator drive gear. If necessary, replace the Developing Drive Pulley-Lower 45t (p/n 50GA 1565 0).
2.TCR output abnormality.
Replace TCR sensor (p/n 26NA 8804 1).
3. TheHV supply unit has failed.
Replace the HV supply unit (p/n 50GA84010).
Note : Developer is also being pulled from the developing unit to the drum.
4. Pulling developer onto the drum andcopies or constant jamming at the registration rollers andconstant failing of the PRCB after it is replaced due toshorted
Toner Addition Solenoid (SD5).A longer screw wasinserted for solenoid which shorts the windings in the solenoid. Longer screw inserted when the C-2803
modification is installed or the assembly is removed.
Replace the PRCB (p/n 50GA-9020E), the toner solenoid (p/n 26NA82513) and install shorter screws.
Note : Please refer toattached documentation for solenoid location. To viewthe PDF, Adobe Reader® must be installed. Adobe Reader® can be
downloaded for free from the Adobe® web site at:
Adobe - Adobe Reader download - All versions .
5. Toner is not being added to the developing unit due to the toner supply motor (M4) not being turned on. The PRCB has failed.
Replace the PRCB (p/n 50GA-9020E).
6. Firmware update required if still using an earlier version. TCR adjustment should also be run.
Note : Usually occurs when C-2803 or C-2801 error message is indicated at the time of setup.
Please install the latest firmware which is available via the Konica Minolta Download Selector. Access the Selector from SSD Web Support (CS Expert
Support) by clicking on 'Download MSDS, Drivers, Firmware and more'.
To run the TCR adjustment:
1. Sub Power Switch OFF/ON.
2. Get into "Service Mode".
3. "Service Mode Screen" =>Press [Imaging Process Adjustment].
4. "Process screen" =>Press [TCR Adjustment].
5. "TCR Adjustment screen" =>Press the Start Key.
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