Xerox WorkCentre Pro 412 Service Manual page 97

Error Status Check
Stains on 1. Contamination of transfer
back of roller
paper 2. Stains of paper path
3. Pressure roller's contami-
nation
Poor Fusing 1. Check the paper quality.
2. Check fusing temperature.
3. The machine has been in a
low temperature for a long
period of time?
Partial blank 1. Toner is low?
image 2. The toner cartridge is out of
(not peri- position?
odic)
Partial blank 1. Damaged developer unit
image 2. Defect repeated every 94
(periodic) mm.
3. Defect repeated every 47
mm.
Different 1. Charge roller's pressure is
image den- uneven along it's length.
sity 2. Dev. roller and OPC or
(left and Dev. roller and blade's pres-
right) sure is uneven along it's
length.
3. Transfer roller's pressure is
uneven along it's length.
Horizontal 1. Poor high voltage contact.
band 2. Charge roller contamina-
tion.
3. Heat roller contamination.
4. Malfunction of LSU.
NO Roller
1 OPC drum
WorkCentre Pro 412
Launch Issue
Abnormal image period
94.29mm
August 2001
Maintenance & Troubleshooting
Solution
1. Clean the transfer roller with vacuum
cleaner
2. Clean the area of paper path with
cloth or air cleaner.
3. Install a new fuser.
1. Try alternative paper.
2. Check engine controller board.
Measure the thermistor voltage to CPU,
2.62V±5% will be measured if the sys-
tem is working correctly. Check the ther-
mistor contact and thermistor.
3. Re-check the fusing after placing the
machine in a warm place for an hour or
more.
1. Install a new toner cartridge.
2. Ensure the toner cartridge is correctly
installed.
1 and 2. Install a new toner cartridge.
3. Install a new transfer roller.
1 and 2. Install a new toner cartridge
3. Check left and right spring of transfer
roller and the developer spring inside the
unit.
1. Clean each contact and check good
contact.
2. Clean charge roller.
3. Install a new fuser.
4. Check Main PBA.
Kind of abnormal image
White spot
7-15