Maintenance And Servicing; Image Adjustment Basic Procedure - Canon 1000 Service Manual

I. MAINTENANCE AND SERVICING
A. Image Adjustment Basic Procedure
Set 'PASCAL' to '0' under
'ADJUST'.
Execute service mode at
'TEST > PG=05 (halftone),
A4, and copy count 15'.
an appreciable difference
in copy density between
the 1st copy and
Check the height of each
charging wire, and clean
each wire.
Clean the dust-proofing glass.
Make several copies using
the CA-1 Chart.
Make the following copies under 'TEST' in service mode.
Select M in user mode, and at PG=04 (17 gradations).
Select C in user mode, and at PG=04 (17 gradations).
Select Y in user mode, and at PG=04 (17 gradations).
Select K in user mode, and at PG=04 (17 gradations).
At PG=05 (halftone), DNES-M=48, DNES-C/Y/K=0
At PG=05 (halftone), DNES-C=48, DNES-M/Y/K=0
At PG=05 (halftone), DNES-Y=48, DNES-M/C/K=0
At PG=05 (halftone), DNES-K=48, DNES-M/C/Y=0
At PG=14 (full color, 17 gradations), TXPH=0, THRU=1
image fault (difference
in density between front and
rear, fogging, uneven density)
on the copies of the
CA-1 Chart
Check the original exposure
system.
COPYRIGHT © 2001 CANON INC.2001200120012001CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
START
Is
there
YES
the 15th
1. 1.Set to 'DNES-Y/M/C/K
copy?
=20'; then, generate 20
NO
copies at 'PG=05 (halftone)'.
2. Check the internal static
eliminator roller.
3. Check the internal static
eliminator high-voltage
system.
Is the
NO
only?
YES
Are there
YES
wavy lines on the
copies?
1. Check the separation
charging assembly for dirt.
NO
2. Check the separation
charging assembly for leakage.
Are there
YES
toner splashes on the
copies?
1. Check the high-voltage
system for separation charging.
2. Check the high-voltage
NO system for pre-fixing charging.
3. Check the environment
Is there
sensor.
a difference in
density between left and NO
right on copies made at
PG=04
(17 gradations)
?
YES
Execute 'INSTALL->STIR-Y/
M/C/K' (for the problem color).
Check to see if the grid plate
is mounted properly.
YES
NO
Is the image darker
at the rear?
YES
Turn the charging wire Turn the charging wire
height adjusting screw at height adjusting screw at
the front of the primary the front of the primary
charging assembly for the charging assembly for the
problem color clockwise. problem color counter-
clockwise.
3/4 turn 3/4 turn
Generate Test Print TYPE=4.
Checking the Original Exposure System
1. Check the mounting position of the copyboard glass, standard
white plate, scanning lamp reflecting shade, and No. 1/2/3
mirror.If dirt is found, clean the part.
2. Check to see if the No. 1 mirror mount or the No. 2 mirror
mount should have ridden over the rail.
3. Check to see if the values in service mode are as indicated
on the service label.
If there is no problem after the above checks and cleaning,
execute 'FUNC > CCD > AUTOADJ' in service mode.
Is
a specific
color suffering from
NO
an image fault (density difference,
fogging, low
density)?
Check
the transfer system
YES
(a of next page). Is the problem
corrected after performing
the instructions?
NO
Check
the latent image
formation system (b of next
YES
page). Is the problem
corrected after
performing the
instructions?
NO
Check
the developing
YES
system (c of next page).
Is the problem corrected
after performing the
instructions?
Set 'PASCAL' to '1' under
'ADJUST' in service mode.
NO
Excute auto gradation correction.
NO
Is the color balance
normal?
Execute
YES
YES 'FUNC > CCD >
AUTOADJ' in service mode.
Is the problem
corrected?
NO
Execute 'FUNC > EPC >
in service mode.
Execute auto gradation
correction in user mode.
YES Is the color
balance normal?
NO
Adjust 'COL-ADJ' in
user mode.
END
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