Scanner Section - Sharp AR-M450 Service Manual

Print off-center SIM 50-10 Tray 1
Tray 2
Tray 3
Tray 4
MFT
ADU
•For the duplex mode (Single ? Duplex), add 10 to the above set value.
•When the print line is shifted toward a from the paper center, decrease the value.
•When the print line is shifted toward b from the paper center, increase the value.
C. Resist quantity setup
•This adjustment required a fine accuracy.
Do not change the default as far as possible.
This adjustment is performed in the following cases:
•When the void quantity is changed by the paper feed tray.
•When paper is skewed.
Before performing this adjustment, the following adjustments must have
been completed.
•LSU right angle adjustment
•Print magnification ratio adjustment
•Print off-center setup
•Void area setup
1) Execute SIM 51-2.
2) Adjust the resist quantity so that paper is transferred stably.
<Factory setup value>
45PPM BPT
T1
T2
DESK
ADU
35PPM BPT
T1
T2
DESK
ADU
Adjustment position
Tray 1 Output pattern
center line
Tray 2
Tray 3/LCC left
Tray 4/LCC right
Manual feed
Duplex
55
60
50
50
50
60
65
55
55
55
AR-M350 ADJUSTMENTS 9-3
Measurement Specification
reference
0±1.5mm

3. Scanner section

A. Scanner unit distortion adjustment
Before executing this adjustment, the following adjustment must have
been completed.
•LSU right angle adjustment
1) Make a test chart as shown below. (Make a self-print pattern 71.)
2) Make a copy from the table glass, and check it.
At that time, set the test chart correctly. If it is set in a distorted
position, the adjustment cannot be made correctly.
3) If the output value is not in the specified range, perform the following
adjustment.
4) Adjust the distortion.
[Fig. 1]
First copy image
Image
Paper
Difference
A
•In the case of Fig. 1
Shift cam A in the direction A by the difference in the copy image.
For one scale (one groove), shift by 0.5mm.
After shifting, tighten the fixing screw (M3 x 12) of cam A and make a
copy again, and check the copy again to insure that there is no distortion.
•In the case of Fig. 2
Shift cam A in the direction B by the difference in the copy image.
For one scale (one groove), shift by 0.5mm.
After shifting, tighten the fixing screw (M3 x 12) of cam A and make a
copy again, and check the copy again to insure that there is no distortion.
Set value
Default Range
50 0 - 99
[Fig. 2]
First copy image
Image
Paper
Difference
B
Set value 1:
0.1mm shift