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Model
AR-M351U AR-M451U (serv.man16)
Pages
17
Size
1.78 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Adjustments
File
ar-m351u-ar-m451u-sm16.pdf
Date

Sharp AR-M351U / AR-M451U (serv.man16) Service Manual ▷ View online

AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 10
<Display values 1>
<Set values 2>
With the above + 10, the SPF enters the duplex mode (DD),
making duplex copy.
<Set values 3>
<8> Original off-center adjustment
Items which must have been completed before this adjust-
ment.
• Adjustment on the engine side (If there is no problem in self
print, no need to adjust.)
• OC scan distortion adjustment
• SPF scan distortion adjustment
• OC scan magnification ratio
• SPF scan lead edge adjustment
Items which must be executed after completion of this adjust-
ment.
• Nothing special
1) Set an original on the original table. 
2) Execute SIM 50-12.
3) Select the paper feed tray and the magnification ratio. 
4) After entering the adjustment value, pres START key, and
printing is started.
5) Check the off-center (distance from the paper lead edge) of
the printed copy. Repeat procedure 2 until the printed copy
satisfies the specifications.
• 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.
<Specifications>
3. Scanner section
A. OC scan distortion adjustment 
(MB-B rail height adjustment)
• This adjustment requires a high-level preciseness.
It is easier to perform the scanner unit distortion adjustment pre-
viously described. 
Before performing this adjustment, the following adjustment must
have been completed.
• LSU right angle adjustment
1) Make a test chart as shown below. (Print 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 fol-
lowing adjustment.
4) Remove the front cabinet in front of the scanner, and check
that installing position of the MB rail. 
5) Loosen the screw at the right of the MB rail to adjust.
<Specifications>
Normal display
NOW COPYING
ERROR display
Door open
DOOR OPEN.
Jam
JAM
Paper empty
PAPER EMPTY.
1
TRAY1
2
TRAY2
3
TRAY3
4
TRAY4
5
Manual feed
Set range
25 - 200%
Adjustment position
Measurem
ent 
reference
Specification
Set value
Default
Range
Original 
off-center 
SIM50-12
PLATEN
OC mode
Copy 
output 
center line
As shone in 
the table 
below.
50
0 – 99 Set value 
1: 0.1mm 
shift
SPF 
SIDE1
SPF front 
surface 
adjustment
SPF 
SIDE2
SPF back 
surface 
adjustment
a
b
Specification ± 1.5mm 
Print lead edge
2
SIMULATION 50-12
ORIGINAL OFF-CENTER ADJUSTMENT. SELECT 0-9, AND PRESS
START.
0.TRAY SELECT 
1
   1.COPY START
2.MAGNIFICATION 
100
(ADJUSTMENT DATA)
3.PLATEN 
50
 4.SPF SIDE1 
50
 5.SPF SIDE2 
50
Machine (OC mode)
Single
±1.5mm
Duplex
±1.7mm
Overall (DSPF)
Single S - S
±2.8mm
Single D - S
±3.5mm
Duplex S - D
±3.0mm
Duplex D - D
±3.5mm
Measurement 
point
Specification
Set value
OC scan 
distortion 
adjustment
Angle 
θ
 in the 
above figure
θ
 = 90°±0.13° 1 scale = about 
0.25°shift in 
θ
AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 11
B. Vertical image distortion balance adjustment
(Copy lamp unit installing position 
adjustment)
1) Insert the front/rear mirror base drive wire into the frame
groove and press and fix it with the wire holder. At that time,
do not tighten the wire fixing screw. Change the direction of
the lamp positioning plate. (F and R)
2) Push the copy lamp unit onto the positioning plate, and tighten
the wire fixing screw.
<Note for assembling the copy lamp unit>
After fixing, manually shift the copy lamp unit a few times to check
that it moves smoothly.
C. Vertical image distortion balance adjustment
(No. 2/3 mirror base unit installing and 
position adjustment)
This adjustment is to adjust the parallelism of the mirror base to
the OPC drum surface and the original surface.
1) Manually turn the mirror base drive pulley to bring mirror base
B into contact with mirror base positioning plate.
If, at that time, the front frame side and the frame side of mirror
base B are brought into contact with the mirror base position-
ing plate simultaneously, the parallelism is correct and there is
no need for adjustment.
D. Vertical (sub scanning direction) distortion 
adjustment [Winding pulley position 
adjustment]
This adjustment is executed in the following cases:
• When the mirror base drive wire is replaced.
• When the lamp unit, or No. 2/3 mirror holder is replaced.
• When a copy shown below is made.
1) Set A3 white paper on the original table as shown below.
2) With the original cover open, make a normal (X 1.0) copy.
3) Measure the black distance at the lead edge and the rear
edge of the copy paper.
If La = Lb, the procedures 4) through 7) are not required.
Lb
La
Original
Paper
exit
direction
Copy
Glass holding plate
Fit the paper edge and
the glass holding plate edge
A3 white paper
Paper exit direction
La : Lead edge black background section
Lb : Rear edge black background section
AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 12
4) Loosen the fixing screw of the front or the rear frame mirror
base drive pulley.
5) Tighten the fixing screw of the mirror base drive pulley.
6) Perform procedures 1) through 3).
7) If La is not equal to Lb, perform procedures 4) and 5).
If La = Lb, the adjustment is completed.
Repeat procedures 1) through 6) until La = Lb.
E. Height adjustment of original detection light 
emitting unit
1) Execute SIM 41-3.
2) Open the original cover. Press the original detection light-emit-
ting unit gradually with your finger to check the height at which
OCSW display on the LCD is highlighted. 
3) Open the original detection light-emitting unit gradually to
check the height at which OCSW display turns to the normal
state.
4) If the heights are out of the specified range in procedures 2)
and 3), adjust the height of the original detection light emitting
unit by shifting the adjustment screw. 
5) After completion of adjustment, press the original detection
light emitting unit fully downward with your finger and release
it. Check that the original detection light-emitting unit moves
up smoothly.
<Specification>
F. Original size detection photo sensor check
1) Execute SIM 41-1.
2) Put A3 (or WLT) paper on the table glass, and check that all
the sensor displays (except for OCSW) on the LCD are high-
lighted.
3) Gradually move the unit to the left, and check that the high-
lighted sensor displays turn off one by one sequentially. 
G. Original size detection photo sensor 
adjustment
1) Execute SIM 41-2. 
At that time, check that the scanner mirror base is at the
home position. 
2) Open the document cover. Select 1 without placing paper on
the table glass, and press START.
3) When COMPLETE is displayed on the LCD, press CUSTOM
SETTING to return to the initial screen. 
4) Place A3 (or WLT) paper on the table glass, select 2 and
press START.
When COMPLETE is displayed, the adjustment is normally
completed. 
If ERROR is displayed, the error PD sensor is displayed.
<Specification>
•If La < Lb, turn the rear frame mirror base drive pulley in
direction B. 
(Do not move the mirror base drive pulley shaft.)
•If La > Lb, turn the rear frame mirror base drive pulley in
direction A. 
(Do not move the mirror base drive pulley shaft.)
A
B
Front side
Rear side
Adjust screw
32±0.5mm
SIMULATION 41-3
PD SENSOR DATA DISPLAY.
OCSW
PD1[128]: 200     PD2[128]: 200
PD3[128]:  50     PD4[128]:  52
PD5[128]:  51     PD6[128]:  50
PD7[128]:  52
Specification Adjustment position
Original size 
detection position
32±0.5mm
Height adjustment 
screw
SIM 41-3
Select 2 and press [START] key. 
(Error)
Press [CUSTOM SETTINGS] 
key.
Specification
Adjustment
Document size detection photo 
sensor adjustment
COMPLETE
SIM 41-2
SIMULATION 41-1
PD SENSOR CHECK..
OCSW  
PD1
  
PD2
  
PD3
  PD4  PD5  PD6  PD7
SIMULATION 41-2
PD SENSOR ADJUSTMENT. SELECT1-2, AND PRESS START.
(PLEASE OPEN THE ORIGINAL COVER.) 
1. NO ORIGINAL
2. A3 ORIGINAL
1
SIMULATION 41-2
Press [CUSTOM SETTINGS] key. 
Select 1 and 
press [START] key. 
PD SENSOR ADJUSTMENT.
NO ORIGINAL ··· COMPLETE (or "ERROR at 
PD1 PD2
...")
A3 ORIGINAL ··· INCOMPLETE
SIMULATION 41-2
PD SENSOR ADJUSTMENT.
NO ORIGINAL ··· COMPLETE
A3 ORIGINAL ··· COMPLETE (or "ERROR at 
PD1 PD2
...")
AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 13
H. Image density adjustment
The image density adjustment is required for the following copy
quality mode by using the simulation.
There are two methods; the collective adjustment and the individ-
ual adjustment of the copy quality mode.
• Copy mode
• FAX mode
(1) Copy mode
a. Test chart setting
1) Place a test chart (UKOG-0162FCZZ) on the original table as
shown below.
2) Place several sheets of A3 (11 x 17) white paper 
(Sharp’s specified paper) on the test chart at the rear refer-
ence.
Test chart comparison
b. Density adjustment procedure
<1> Collective adjustment of two or more copy quality modes
Normally this adjustment is performed with SIM 46-2. In this
method, two or more copy density adjustments in different modes
can be adjusted collectively.
1) Execute SIM 46-2.
(Binary value mode)
Copy quality mode Collective
Adjustment
Individual 
adjustment
Binary 
value 
mode
Auto mode
SIM46-2
Character mode
SIM46-9
Character/Photo mode
SIM46-10
Photo mode
SIM46-11
Adjustment
Individual 
adjustment
Normal 
mode
Binary value 
mode
AUTO
SIM46-12
SIM46-13
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Small text 
mode
Binary value 
mode
AUTO
SIM46-14
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Half tone 
mode
AUTO
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Fine mode
Binary value 
mode
AUTO
SIM46-15
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Half tone 
mode
AUTO
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Super fine 
mode
Binary value 
mode
AUTO
SIM46-16
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Half tone 
mode
AUTO
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
600dpi 
mode
Binary value 
mode
AUTO
SIM46-45
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
Half tone 
mode
AUTO
EXP1.0
EXP2.0
EXP3.0
EXP4.0
EXP5.0
UKOG-
0162FCZZ 
DENSITY No.
1
2
3
4
5
6
7
8
9
10 W
UKOG-
0089CSZZ 
DENSITY No.
0.1
0.2
0.3
0.5 1.9
0
KODAK GRAY 
SCALE
1
2
3
4
19
A
SHARP 
CORPORATION 
MADE IN JAPAN
Quality mode
Linked simulation data
AE3.0 (AE)
CH3.0 (Character)
SIM46-9
MIX3.0 (Character/Photo)
SIM46-10
PH3.0 (Photo)
SIM46-11
UKOG-0162FCZZ
1
10
W
2
3
4
5
6
7
8
9
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