Maintenance Procedures - Xerox 8850 Service Manual

Maintenance Procedures

INTERVAL TASK
Normal Call Check, clean, or repair spacing wheels
as required.
Normal Call Check and clean, if required, the
charge Scorotron.
Normal Call Clean the image bar.
15K ft. Clean the Scorotron Screen.
4.5Km
As Required Repair or replace the scorotron/ grid.
INTERVAL TASK
Normal Call Clean the Drum/cleaner module.
Clean the Erase Bar.
Inspect the Drum for damage.
Inspect components for vellum con-
tamination.
Inspect all seals for damage.
Inspect the Cleaner Blade for damage.
As Required Check/clean the Drum.
As Required Check/clean the cleaning
*Note 3 Replace with the new Drum or as
required.
8850/ 510DP
Table 1 Image Module
REASON
Contaminated, dirty or worn spacing wheels or Drum
ends cause print quality defects.
Contaminated grid, bent or contaminated pins. Worn
end blocks, are also causes for scorotron failure,
which results in print quality defects.
Contamination causes print quality defects.
Contamination on the screen causes print quality
defects
Contamination causes print quality defects.
Table 2 Drum/ Cleaner Module
REASON
Contamination can cause print quality problems. Con-
taminants can travel to the LED bar and scorotrons,
which results in print quality problems. Fused toner on
the bottom of the module can cause jams.
Contamination reduces the effectiveness of the lamp
to discharge the Drum.
Contaminants from vellum
- Cleaner failure
- Contaminants to prints.
Vellum contamination will contaminate and plug the
cleaner auger at the ends.
Contamination/wear, scratches, or chips can generate
print quality problems.
blade. Residual image, streaks, Drum scuffing can occur if
the blade is worn or contaminated.
TASK ENABLER
Clean or replace spacing wheels and the end surface of the Drum that the
wheels ride on.
The scorotron pin arrays are very sharp. Use care when handling the
assembly.
If contaminated, remove scorotron assembly and clean both sides of the
grid with a brush. Examine pins and clean with brush Only if contaminated.
Cleaning with a cloth can deposit lint that will cause print quality problems.
Clean the image bar with a lint free cloth and lens cleaner.
Remove the Scorotron Screen and clean it with a brush.
NOTE: Do not use a cloth to clean the Scorotron Screen as it can leave lint
on the screen, causing print quality problems.
The scorotron pin arrays are very sharp. Use care when handling the
assembly.
Replace the grid and/or pin array.
Perform ADJ 9.2 Electrostatic Series.
Clean the toner from the housing and cleaner blade with a vacuum cleaner.
NOTE: Ensure that the vacuum cleaner does not contact the edge of the
cleaner blade that touches the surface of the Drum.
Perform the Drum Cleaning Enhancement procedure in section 6. Use
cleaning solvent to remove any fused toner from the bottom of the module.
Replace the Drum if damaged.
Clean the Erase Bar with a brush or dry lint free cloth.
Replace any damaged xerographic module seals.
Inspect Drum surface for deep scratches, chips or excessive wear. Replace
Drum if damaged.
Apply zinc stearate to the cleaning blade and Drum. *Note 2
Clean Drum surface with Xerox Film Remover if contaminated. Apply zinc
stearate when surface is dry.
Vacuum clean the cleaning blade. *Note 1
Apply zinc stearate to the cleaning blade and Drum. *Note 2
Replace the blade if damaged.
03/2003
1-13
WARNING
WARNING
TASK ENABLER
Service Call Procedures
Maintenance Procedures