Canon NP6330, Руководство по обслуживанию

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I. MAINTENANCE AND INSPECTION
A. Image Adjustment Basic Procedure
non-AE, copy density at 5
COPYRIGHT © 1997 CANON INC. CANON NP6330 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
11-3
Is the density of
gray scale No. 1
too light?
Is there a
difference in density between
front and rear?
Clean the primary
charging wire and the
static eliminator.
Execute 'U25' in user
mode (wire cleaning) to
clean the transfer
charging wire.
Make a copy.
Is it higher at front
Turn the adjusting screw
at the front of the primary
corona assembly
counterclockwise. Turn the adjusting screw
at the front of the primary
corona assembly
clockwise.
Decrease the setting of
‘302’ in service mode [3]
so that the density of No.
9 decreases (Note 1)
Increase the setting of
‘302’ in service mode [3]
so that the density of No.
9 increases (Note 1)
Is the density
of gray scale No. 9
identical to the density of No. 8
through No. 9 of
the chart?
Is the density
of gray scale No. 9 too
high (dark)?
Pre-Check
Checks on Solid Black Density Adjustment on Density Slope
Optimum Density Adjustment
YES
NO NO
YES
NO
Make a copy.
YES
NO
YES
NO
YES
Start
Make a copy.
Adjust the slit according to the slit plate
adjustment procedure (next page)
Turn the adjusting screws
in the front and at the rear
of the primary corona
assembly counterclockwise
to move the primary corona
wire closer to the drum.
Check the height of the
corona wires.
Is the setting of ‘U21’
(density correction) in user
mode the middle
value?
Set it to the middle value.
Check to make sure that the
settings of ‘301’ and ‘302’ in
service mode [3] are as
indicated on the service
label attached to the front
door; otherwise, correct the
settings.
non-AE, copy density at 5,
2 to 3 copies (NA-3)
Check the following:
1. difference in density
between front and rear
2. density of gray scale
No. 9
3. presence/absence of
fogging in white
background
YES
NO
Note1: A shift is mode in the
control table for the
intensity of scanning
lamp.
End