Symptom
Uneven density of halftone image may appear in the area up to 85mm from the trailing edge. (See the example below)
[A]: Paper feed direction
Cause
Uneven density may appear because of the difference of both sticking level and distance between the ITB and the paper immediately before the paper transfer process.
The following factors tend to change the sticking level and the distance:
- When the rotation speed of the transfer timing roller and paper transfer belt differ to a great degree
- Thin paper stocks
In low-temperature, low-humidity environments, an electric field is generated at the entrance of the paper transfer belt
Action
Do the one of the following workarounds.
- Adjust the transfer timing roller speed. Change each value by 0.1%.
MP C6503/C8003, Pro C5200S/C5210S
SP No.
SP Name
SP2-661-001 to 099
PTR Spd Adjustment
Pro C5200S/C5210S only
No.
IMSS setting
069
Paper Transfer Belt Feed Speed
- Only change the paper type and thickness that the user needs to use.
- Change either registration motor speed or transport motor speed. If you use this workaround, reset the transfer roller speed to the default, then change each value by 0.1%.
MP C6503/C8003, Pro C5200S/C5210S
SP No.
SP Name
SP1-008-001 to 023
Fine Adj Transport Mtr 1 Spd
SP1-010-001 to 023
Fine Adj Transport Mtr 2 Spd
SP1-012-001 to 023
Fine Adj Transport Mtr 3 Spd
SP1-016-001 to 025
Fine Adj Relay Mtr CW Spd
SP1-019-001 to 025
Fine Adj Registration Mtr Spd
SP1-034-001 to 025
Fine Adj Duplx Exit Mtr Spd
Pro C5200S/C5210S only
No.
IMSS setting
075
Registration Motor Feed Speed
076
First Transport Motor Feed Speed
077
Second Transport Motor Feed Speed
078
Third Transport Motor Feed Speed
080
Relay Transport Motor Feed Speed: CW
081
Relay Transport Motor Feed Speed: CCW
096
2 Sided Exit Motor Feed Speed
- Only change the paper type and thickness that the user needs to use.
- Change all the speeds by the same amount.