Feeder Unit - Canon iPF720 Service Manual

4.3.9 Feeder Unit

a. Handling the feed roller
The feed roller is a functionally vital part. Observe these precautions when handling it:
-Do not handle the feed roller with one hand or deflect it.
-Do not touch the roller surface (coated side).
-Do not flaw or dent the roller surface.
-Hold the feed roller by two positions shown below: holding position A and one of holding positions B, C and D.
b. Action following the replacement of the feed roller
This printer as shipped has the feed roller eccentricity (that is, variations in the rate of paper feed from rotation to rotation) corrected for enhanced media feed ac-
curacy. When the feed roller, feed roller HP sensor or feed roller encoder pertaining to the correction of eccentricity variations has been replaced or when the feed
roller has been replaced or disassembled and reassembled, therefore, the feed roller should require adjustment.
Execute service mode under the following conditions:
Service mode SERVICE MODE > ADJUST > PRINT PATTERN > LF TUNING
Media type: Gloss photo paper
Paper size: 36 inches
If adjustment cannot be done properly by selecting "SERVICE MODE > ADJUST > PRINT PATTERN > LF TUNING" (auto adjustment), carry out manual ad-
justment.
Service mode SERVICE MODE > ADJUST > PRINT PATTERN > LF TUNING2
Media type: Gloss photo paper
Paper size: 36 inches
Check the printed pattern and enter values for adjustment.
A
B
C
F-4-28
D
Chapter 4
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