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Model
AR-285 (serv.man11)
Pages
28
Size
747.22 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / AR280 285 335 Service Manual-Settings and Adjustments
File
ar-285-sm11.pdf
Date

Sharp AR-285 (serv.man11) Service Manual ▷ View online

H. SPF
(1) Hinge height check and adjustment (Image distortion
adjustment)
(Adjustment 1)
Hinge ass’y R hinge space dimension adjustment
(1)
Loosen the two fixing screws of SPF.
(2)
Loosen the nuts, turn the distortion adjustment screw and adjust
dimension T to 3.0 mm. 
(3)
Tighten two fixing screws of SPF and fix the hinge base. 
(4)
Fix the distortion adjustment screw with the nut. 
When the distortion adjustment screw is turned in the direction of X
(clockwise), the dimension T is increased. 
(Turn the distortion adjustment screw in the direction of X (clockwise),
and shift the SPF in the direction of arrow as shown above to adjust
the dimension T.)
When the distortion adjustment screw is turned in the direction Y
(counterclockwise), the dimension T is decreased. 
(Adjustment 2)
Hinge ass’y L SPF height a adjustment
(1)
Loosen the nut and turn the height adjustment screw to adjust
dimension a to 10 
±
 0.5mm.
(2)
After adjusting the height, fix he height adjustment screw with
the nut.
Turn the distortion adjustment screw in the direction of C (clockwise)
to increase dimension a. 
Turn the distortion adjustment screw in the direction of D (counter-
clockwise) to decrease the dimension a. 
Hinge ass’y R SPF height b adjustment
(1)
Loosen the nut and turn the height adjustment screw to set
dimension b to 10 
±
 0.5 mm.
(2)
After adjusting the height, fix the height adjustment screw and
loosen the nut. 
When the height adjustment screw is turned in the direction of C
(clockwise), the dimension b is increased.
When the height adjustment screw is turned in the direction of D
(counterclockwise), the dimension b is decreased.
(Image distortion specification)
The right angle distortion of the short side for the long side must be
adjusted to less than 1.0 mm.
T=3.0mm
Distortion
adjustment
screw
Nut
Hinge base
Hinge ass'y R
SPF fixing screw
Hinge base
adjustment scale
Z
(1 scale: 1mm)
(Slide the SPF by
  adjustment 1.)
Hinge ass'y L
PPC body
Hinge ass'y R
SPF
A
B
SPF fixing
screw
Y
X
(SPF adjustment direction by turning
  the distortion adjustment screw)
10±0.5mm
Height adjustment
screw
D (Counterclockwise)
Nut
C (Clockwise)
Hinge ass'y L
a
10±0.5mm
Height adjustment
screw
D (Counterclockwise)
Nut
C (Clockwise)
Hinge ass'y R
b
Print image
Copy
Paper
1.0mm or less
220
7 – 19
(Distortion pattern and adjustment)
1) Check that which one of the copy image patterns 1 
 8 shown
below is like the copy image distortion. 
2) Follow the adjustment procedure according to the copy image
patter. 
(Refer to adjustment 1, 2.) 
Note
1) When the hinge ass’y R height adjustment is performed, be sure
to perform adjustment (2) (Open/close sensor adjustment) again. 
 Distortion adjustment procedure 
(Copy image pattern 1)
(Adjustment procedure)
1) Perform adjustment 1 and adjust the distortion in the X section. 
 
Adjustment 
reference  When the hinge space T dimension is
changed by 1mm, the X dimension is changed by 0.5 
 0.7mm,
2) If the distortion in the Y section cannot be adjusted with adjust-
ment 1, perform adjustment 2. 
 
Adjustment 
reference  When the hinge a section dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm,
(Copy image pattern 2)
(Adjustment procedure)
1) Perform adjustment 1 to adjust the distortion in the X section. 
 Adjustment reference  When the hinge base T section dimension is
changed by 1mm, the X dimension is changed by 0.5 
 0.7mm.
2) If the distortion in the Y section cannot be adjusted with adjust-
ment 1, perform adjustment 2. 
 
Adjustment 
reference  When the hinge a section dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm.
(Copy image pattern 3)
(Adjustment procedure)
1) Perform adjustment 2 to adjust the distortion in the Y section.
 
Adjustment 
reference  When the hinge section a dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm. 
(Copy image pattern 4) 
(Adjustment procedure)
1) Perform adjustment 2 to adjust the distortion in the Y section.
 
Adjustment 
reference  When the hinge section a dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm. 
(Copy image pattern 5)
(Adjustment procedure)
1) Perform adjustment 1 to adjust the distortion in the X section. 
 Adjustment reference  When the hinge base T section dimension is
changed by 1mm, the X dimension is changed by 0.5 
 0.7mm.
2) If the distortion in the Y section cannot be adjusted with adjust-
ment 1, perform adjustment 2. 
 
Adjustment 
reference  When the hinge section a dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm,
Document feed direction
Copy surface
X
Y
1
X
Y
Copy surface
2
Y
Copy surface
3
Copy surface
Y
4
Document feed direction
Copy surface
Y
X
5
7 – 20
(Copy image pattern 6)
(Adjustment procedure)
1) Perform adjustment 1 to adjust the distortion in the X section. 
 Adjustment reference  When the hinge base T section dimension is
changed by 1mm, the X dimension is changed by 0.5 
 0.7mm.
2) If the distortion in the Y section cannot be adjusted with adjust-
ment 1, perform adjustment 2. 
 
Adjustment 
reference  When the hinge section a dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm,
(Copy image pattern 7)
(Adjustment procedure)
1) Perform adjustment 1 to adjust the distortion in the X section. 
 Adjustment reference  When the hinge base T section dimension is
changed by 1mm, the X dimension is changed by 0.5 
 0.7mm.
2) If the distortion in the Y section cannot be adjusted with adjust-
ment 1, perform adjustment 2. 
 
Adjustment 
reference  When the hinge base T dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm,
(Copy image pattern 8)
(Adjustment procedure)
1) Perform adjustment 1 to adjust the distortion in the X section. 
 Adjustment reference  When the hinge base T section dimension is
changed by 1mm, the X dimension is changed by 0.5 
 0.7mm.
2) If the distortion in the Y section cannot be adjusted with adjust-
ment 1, perform adjustment 2. 
 
Adjustment 
reference  When the hinge section a dimension is
changed by 1mm, the Y dimension is changed by 0.2 
 0.4mm,
(2) Open/close sensor adjustment
1) Execute SIM 2-2 by the key operation of the copier. 
With the above operation, "AUOD" (automatic document feeder
open/close sensor) is displayed on the message screen. 
2) Check that the open/close sensor (AUOD) is ON when the dis-
tance between the base height reference projection (1) inside the
automatic document feeder and the table glass (2) is 20 
 50mm. 
If the distance is shifted, adjust as follows.
3) Loosen the fixing screw (2) of the open plate (1) at the rear of the
hinge on the right side of the automatic document feeder, and
move the open plate up and down to adjust. 
After completion of the adjustment, press the 
 key to cancel
the mode. 
Copy surface
Y
X
6
Y
X
Copy surface
7
Y
X
Copy surface
8
50mm
20mm
(1)
(2)
(1)
(2)
CA
7 – 21
I. RADF
(1) Document lead edge stop position adjustment
The ADF document lead edge stop position is adjusted by using
SIM 53. 
When shipping, the lead edge is set to (8). An adjustment may be
required depending on documents.
The adjustment range is 8mm (8 steps) in the stopper side and
7mm (7 steps) in the glass side. (1mm: 1 step) For each mode of
single, and duplex, the adjustment value can be set independently.
1) Execute SIM 53-1 on the copier. 
2) Enter the stop position adjustment value in each mode. 
[Explanation of abbreviation]
NORMAL (S):
Single, normal paper stop position adjustment
NORMAL (D):
Duplex, normal paper stop position adjustment
08: 
±
0.0000mm
00: –8.000mm
09: +1.000mm
(Initial value)
01: –7.000mm
10: +2.000mm
02: –6.000mm
11: +3.000mm
03: –5.000mm
12: +4.000mm
04: –8.000mm
13: +5.000mm
05: –8.000mm
14: +6.000mm
06: –8.000mm
15: +7.000mm
07: –8.000mm
(2) Resist/timing/paper exit sensor adjustment
1) Execute SIM 53-2 on the copier
2) Select each sensor and press the EXECUTE key, and the adjust-
ment will be performed automatically. 
REGIST (DFD):
Resist sensor
TIMING (DTD):
Timing sensor
REVERSE (RDD):
Reverse sensor 
1
1: Only when the AR-RF1 is installed.
(3) Test mode with DIP switch 
The RADF (ADF) single unit operation can be checked with the DIP
switch on the control PWB shown below. 
(Control PWB view)
(DIP switch view)
(Operating procedure)
1) Remove the control PWB cover.
2) Disconnect the connector from the CN9 on the control PWB, and
connect the short connector (OCW4074K526//) instead.
0
10 11 12 13 14 15
2
3
4
5
6
7
(8)
9
1
8mm
7mm
Stopper
Glass
Viewed from the operator
DIP switch
CPU
EEP ROM
G/A
Push switch
OFF
ON
SW
No.1
2
3
4
5
Control PWB
Remove
CN9
Short connector (0CW4074K526//)
7 – 22
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