Scheduled Servicing Table - Canon NP6251 Service Manual

CHAPTER 10 MAINTENANCE AND INSPECTION
III. SCHEDULED SERVICING TABLE
Caution:
1. As a rule, provide scheduled servicing every 250,000 copies.
2. Check the Service Record before setting out on a visit, and take any parts likely
to need replacement.
3. If you use alcohol to clean a charging wire, check to make sure it has fully dried
before installing it to the machine.
Step
1 Meet the person in charge.
2 Take notes of the counter reading.
3 Make test copies.
4 Clean the charging assemblies:
• Charging wire
• Grid wire
• Shielding plate
• Roller electrode
5 Clean the optical path:
• Scanner reflecting plate
• Scanner side reflecting plate
• Lens
• No. 1/2/3/4/5/6 mirror
• Dust-proofing glass
• Pre-exposure lamp sheet
• Standard white plate
• Heat absorbing glass
6 Check the waste toner case.
10-4
COPYRIGHT © 1997 CANON INC.
Work
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Checks
Check the general
condition.
Check the faulty copies.
a. Density of image
b. Dirt on background
c. Clarity of characters
d. Leading edge margin
e. Fixing, registration,
back (for soiling)
f. Counter operation
If the waste toner case is
half full or more, dispose
of the toner in a plastic
bag; or, replace the waste
toner case.
Remarks
Standard: 4.5 ±1.5
mm (Direct)
Dry wipe with lint-
free paper; then,
clean with alcohol.
Use a blower
brush; if necessary,
use alcohol.
Moist cloth
Dry wipe.