Scheduled Servicing Work - Canon iR8500 Service Manual

3 Scheduled Servicing Work

1. As a rule, perform scheduled servicing work every 250,000 pages.
2. Before setting out for a scheduled visit, check with the Service Book,
and take parts that are likely to need replacement.
3. Whenever you have cleaned a charging wire, make sure it is completely
dry before mounting it back to the machine.
4. If the power plug is left connected for a long time in an area subject to
excessive dust, humidity, or smoke (containing oil vapor), an insulation
fault and, ultimately, a fire can occur (owing to the build-up of moist
dust).
Be sure to disconnect the power plug on a periodical basis, and wipe the
area and the power plug clean with a dry cloth.
No. Step
1 Meet the person in charge.
2 Take notes of the counter readings.
3 Make test copies.
4 Clean the charging assemblies:
• Charging wire (primary,
pre-transfer, transfer/separation)
• Grid wire (primary charging
assembly)
• Shielding plate (each charging
assembly)
• Roller electrode
COPYRIGHT© 2001 CANON INC.
CHAPTER 5 MAINTENANCE AND INSPECTION
Check the general condition.
Check the faulty copies:
a. Image for density
b. White background for
soiling
c. Characters for clarity
d. Margin along leading
edge
e. Fixing, registration, and
back (for soiling)
T05-300-01
2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
Checks
As of August 2001
Remarks
Standard (single-sided)
Leading edge: 4.0
+1.5/-1.0 mm
Left/right: 2.5 ±1.5 mm
Trailing edge: 2.5 ±1.5 mm
Dry wipe with lint-free pa-
per; then, clean with alcohol.
5-9