Read Sharp MX-M850 (serv.man36) Service Manual online
MX-M1100 ADJUSTMENTS 6 – 14
4-B
Scan image sub scanning direction
distortion adjustment
distortion adjustment
1)
Make a test chart (a rectangular pattern with four right angles)
on A3 (11
on A3 (11
✕ 17) paper as shown below.
2)
Set the test chart made in the procedure 1) on the document
table so that the test charts is shifted toward you by 30mm
from the document set reference position. With the document
cover open, make a copy on A3 (11"
table so that the test charts is shifted toward you by 30mm
from the document set reference position. With the document
cover open, make a copy on A3 (11"
✕ 17") paper.
3)
Check for any distortion in the sub scanning direction.
If La = Lb, there is no distortion.
If La = Lb, there is no distortion.
4)
If there is a distortion in the sub scanning direction, perform the
following procedure.
Loosen either one of the fixing screws of the scanner unit drive
pulley. (Either one in the front frame side or the rear frame side
will do.)
following procedure.
Loosen either one of the fixing screws of the scanner unit drive
pulley. (Either one in the front frame side or the rear frame side
will do.)
5)
Without moving the scanner unit drive shaft, manually turn the
scanner unit drive pulley to adjust the parallelism of the scan-
ner unit A and B. (Change the relative positions of the scanner
unit drive pulley and the drive shaft.)
Tighten the fixing screw of the scanner unit drive pulley.
Repeat the procedures of 2 thru 5 until the condition of proce-
dure 3) is satisfied.
If a distortion in the sub scanning direction cannot be removed
in the above procedures, perform “ADJ 4C Scan image overall
distortion adjustment.”
scanner unit drive pulley to adjust the parallelism of the scan-
ner unit A and B. (Change the relative positions of the scanner
unit drive pulley and the drive shaft.)
Tighten the fixing screw of the scanner unit drive pulley.
Repeat the procedures of 2 thru 5 until the condition of proce-
dure 3) is satisfied.
If a distortion in the sub scanning direction cannot be removed
in the above procedures, perform “ADJ 4C Scan image overall
distortion adjustment.”
4-C
Scan image main scanning direction
distortion adjustment
distortion adjustment
1)
Make a test chart (a rectangular pattern with four right angles)
on A3 (11
on A3 (11
✕ 17) paper as shown below.
L
L
L = 10m
L
L
La
Lb
L
L
L = 10mm
L
L
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