Xerox 8850 Service Manual

03/2003
1-15
8850/ 510DP
Maintenance Procedures
Service Call Procedures
60K Ft. or 20
Km
Replace the Media Exit Drive Roll Roll wear causing wavy media and media jams. Replace the Media Exit Drive Roll (PL 10.4).
Table 5 Media Feed
INTERVAL TASK REASON TASK ENABLER
1st 10K ft. or 3K
m
Remove the drive chain slack. Feeding problems. Loosen the feed motor hardware to allow the spring to tension the chain.
Tighten the hardware.
40K ft. or 13K
m
Remove the drive chain slack. Feeding problems. Loosen the feed motor hardware to allow the spring to tension the chain.
Tighten the hardware.
Table 6 Developer Module
INTERVAL TASK REASON TASK ENABLER
Normal Call Brush the developer from the Devel-
oper Seal and lower edge of the Devel-
oper Housing back into the Developer
Mag Roll and then clean the Seal.
Image quality problems can occur. Clean as required.
Normal Call Check that the Developer Housing is
level.
If the developer is not level, density may not be uni-
form side to side.
Developer material should not be uniform from end to end. Check the level
of the copier.
Normal Call Check the canister for proper rotation. If the canister is not rotating correctly, the copies will
be light.
Check the dry ink dispense motor for binding. Check that the cartridge is
locked in the drive hub.
Normal Call Check the Developer drives. Worn gears will cause the housing to move up or
down, which will cause print quality defects.
Check the gears for worn or broken teeth; replace the gears, if necessary.
Ensure that the drive coupling is engaged.
Normal Call Check, clean, or replace the Developer
Housing spacing wheels, as required.
Contaminated or worn spacing wheels will cause
print quality defects.
Clean or replace spacing wheels.
30K ft. 9 Km Check the trickle tube and toner Y tube
for obstruction.
An obstructed Y tube or trickle tube will clog the
cleaning/trickle system.
Clean as required.
30K ft.
9 Km
Check the Pressure Equalization
Tubes.
Increased contamination due to poor air flow in the
Developer Housing.
Remove Developer Housing. Remove and vacuum Pressure Equalizer
Tubes, vacuum lower holes for toner.
200 K ft.
60 Km
Replace Toner Dust Trap. Minimize toner dust contamination. Remove existing Trap. Install a new Trap.
200K ft.
60 Km
Replace Toner Dust Filter. Minimize toner dust contamination. Remove existing filter. Install new Filter.
200K ft.
60 Km
Check Vacuum Tube. An obstruction in the Tube will clog the Dust Control
System.
Clean as required.
Table 7 Covers
INTERVAL TASK REASON TASK ENABLER
Normal Call Clean the covers. Customer satisfaction. Formula A and antistatic fluid
Table 8 Cutter
INTERVAL TASK REASON TASK ENABLER
Normal Call Check the cam for lubrication. To ensure correct Cutter operation. The Cutter will
not provide a straight cut.
Place a light film of lubrication on the cam surface.
Table 4 Media Transport and Lower Sheet Feed Assembly

Xerox 8850 Specifications

General

Brand	Xerox
Model	8850
Category	Printer
Language	English