Image Check, Adjustment - Sharp MX-M350 Service Manual

2. Image check, adjustment

(1) Copy image check
1) Place a test chart (UKOG-0089CSZZ) on the reference posi-
tion of the OC, and make a copy.
2) Place a test chart (made as shown below) face-down on the
(D)SPF, set the document guide, and make a copy. (Single
Single)
3) Place a test chart (made as shown below) face-up on the
DSPF, set the document guide, and make a copy. (Duplex
Single)
Making of SFP test chart
a. Use standard paper of A3.
b. Mark to the full width of the paper so that each void/image
loss can be checked.
c. At that time, mark so that the front /rear and the top/bottom
can be identified.
d. Draw a center line in the paper transport direction to identify
the off center.
Standard paper of A3
4) Check each output copy.
(Image distortion/ each void/ lead edge position/ Off-center/
Magnification ratio/ Density/ Dirt, etc.)
5) If there is no problem in copy images, the image check is com-
pleted.
(2) Division of adjustment positions
1) If there is any problem in checked images, perform self-print
and the adjustment positions (scanner side/ engine side) are
divided.
*: If there is any problem in the copy image and no problem in
the self print, an adjustment on the scanner side is required.
If there is any problem on the copy image and any problem in
the self print, an adjustment on the engine side is required.
(3) Adjustment procedures
Perform the adjustment procedures as described below.
1 LSU right angle adjustment
2 Print off-center adjustment
3 Each tray resist amount setting SIM51-2
4 Print lead edge adjustment
5 Front/rear and left/right void
amount setting
6 OC scan distortion adjustment
7 SPF height adjustment
8 SPF scan distortion
adjustment
9 Scan magnification ratio
10 SPF/DSPF scan magnification
ratio
11 OC scan lead edge adjustment SIM50-1
12 SPF scan lead edge
adjustment
13 Original off-center adjustment
→
→
Center line
SIM64-1: Pattern "71"
SIM50-10
SIM50-5
SIM50-1
SIM51-2
SIM48-1
SIM48-1
SIM50-6
SIM50-12
MX-M350/M450 N/U ADJUSTMENTS 8 - 3
A. Adjustments on the engine side
<1> LSU right angle adjustment
Items which must have been completed before this adjust-
ment.
• Nothing special
Items which must be executed after completion of this adjust-
ment.
• Print off-center adjustment
• Print lead edge adjustment
• Front/rear and left/right void amount setting
1) Execute SIM64-1.
2) The print pattern "71" is printed.
3) Check the output print.
4) Loosen two fixing screws of the LSU unit
(M4 screws which are fixing the LSU and the top plate).
5) Adjust the LSU fixing position with the adjustment memory as
the reference.
6) Tighten two fixing screws of the LSU unit.
7) Print again in the grid pattern and check the print.
8) Repeat procedures 4) to 7) until the specification is satisfied.
SIMULATION 64-1
SELF PRINT MODE. SELECT 0-7, AND PRESS START.
0. TRAY SELECT :1 1. PRINT START
2. PRINT PATTERN:87 3. DENSITY
4. MULTI : 1 5. MODE
6. LEVEL : 1 7. DUPLEX
<Right angle check method>
<1> Make self-print of pattern 71.
<2> Draw a line perpendicular to the sub scan direction (paper
transport direction) with a square.
The point of intersection of the perpendicular line and the
horizontal line is regarded as the starting point.
<3> Measure distance A (between the self-printed line and the
perpendicular line drawn with a square) at a position of
220mm from the starting point.
<4> Check that distance A satisfies the following specification.
A
Print
lead edge
220mm
1
:1
:1
:1
A