Read Sharp AR-235 (serv.man9) Service Manual online
AR-235/275 ADJUSTMENTS - 1
[7] ADJUSTMENTS, SETTING
1. List of adjustment items
2. Copier adjustment
A. Process section
(1) Developing doctor gap adjustment
1) Loosen the developing doctor fixing screw A.
2) Insert a thickness gauge of 1.5mm to the three positions at 20mm
and 150mm from the both ends of the developing doctor as shown.
3) Tighten the developing doctor fixing screw.
4) Check the clearance of the developing doctor. If it is within the
specified range, then fix the doctor fixing screw with screw lock.
∗
When inserting a thickness gauge, be careful not to scratch the
developing doctor and the MG roller.
developing doctor and the MG roller.
<Adjustment specification>
(2) MG roller main pole position adjustment
1) Put the developing unit on a flat surface.
2) Tie a needle or pin on a string.
3) Hold the string and bring the needle close to the MG roller horizon-
tally. (Do not use paper clip, which is too heavy to make a correct
adjustment.) (Put the developing unit horizontally for this adjust-
ment.)
adjustment.) (Put the developing unit horizontally for this adjust-
ment.)
4) Do not bring the needle into contact with the MG roller, but bring it
to a position 2 or 3mm apart from the MG roller. Mark the point on
the MG roller which is on the extension line from the needle tip.
the MG roller which is on the extension line from the needle tip.
5) Measure the distance from the marking position to the top of the
doctor plate of the developing unit to insure that it is 18mm.
If the distance is not within the specified range, loosen the fixing
screw A of the main pole adjustment plate, and move the adjust-
ment plate in the arrow direction to adjust.
screw A of the main pole adjustment plate, and move the adjust-
ment plate in the arrow direction to adjust.
Section
Adjustment item
Adjustment procedure/SIM No.
A
Process section
(1)
Developing doctor gap adjustment
Developing doctor gap adjustment
(2)
MG roller main pole position adjustment
MG roller main pole position adjustment
(3)
Developing bias voltage adjustment
SIM8-1
(4)
Grid bias voltage adjustment (High mode)
SIM8-2
(5)
Grid bias voltage adjustment (Low mode)
SIM8-3
B
Mechanism section
(1)
OC image lead edge position/Sub scanning
magnification ratio/Original offset auto adjustment
magnification ratio/Original offset auto adjustment
SIM48-3
(2)
Print start position adjustment
SIM50-5
(3)
SPF image lead edge position adjustment
SIM50-6
(4)
Rear edge void adjustment
SIM50-1-6
(5)
Paper off center adjustment
SIM50-10
(6)
Left edge void area adjustment
SIM50-1-8
(7)
Main scanning direction (FR direction) distortion
balance adjustment
balance adjustment
No. 2/3 mirror base unit installing position
adjustment
Copy lamp unit installing position adjustment
adjustment
Copy lamp unit installing position adjustment
(8)
Sub scanning direction (scanning direction)
distortion adjustment
distortion adjustment
Winding pulley position adjustment
(9)
Main scanning direction (FR direction) distortion
adjustment
adjustment
Rail height adjustment
(10)
Main scanning direction (FR direction)
magnification ratio adjustment
magnification ratio adjustment
SIM48-1-1, 48-1-2
(11)
Sub scanning direction (scanning direction)
magnification ratio adjustment
magnification ratio adjustment
a
OC mode in copying (SIM 48-1-3)
b
RSPF sub scanning direction magnification ratio
(SIM48-1-4, 48-1-5)
(SIM48-1-4, 48-1-5)
(12)
Off center adjustment (SPF mode)
SIM50-12
(13)
OC (SPF) open/close detection position adjustment
SIM41-3
(14)
Original sensor adjustment
SIM41-2, 41-4
(15)
SPF white correction pixel position adjustment
(required in an SPF model when replacing the lens
unit)
(required in an SPF model when replacing the lens
unit)
SIM63-7
C
Image density
(exposure) adjustment
(exposure) adjustment
(1)
Copy mode
SIM46-2
20mm
10mm
150mm
10mm
20mm
F
C
R
DG:1.5
+0.1
- 0.15
DG:1.5
+0.1
- 0.15
DG:1.55
+0.15
- 0.2
Developing doctor gap
F/R both ends (20mm from the both ends):1.5
+0.1mm
-0.15mm
C (Center)(150mm from the both ends):
1.55
+0.15mm
-0.2mm
AR-235/275 ADJUSTMENTS - 2
(3) Developing bias voltage adjustment (SIM 8-1)
1) Execute SIM 8-1.
2) After selecting the mode, enter the adjustment value and press the
[OK] key.
3) Output will be made for 30 sec.
<Adjustment specification>
(4) Grid bias voltage adjustment
(High mode) (SIM 8-2)
1) Execute SIM 8-2.
2) After selecting the mode, enter the adjustment value and press the
[OK] key.
3) Output will be made for 30 sec.
<Adjustment specification>
∗
The input value is in the increment of –25V.
(5) Grid bias voltage adjustment (Low mode) (SIM 8-3)
1) Execute SIM 8-3.
2) After selecting the mode, enter the adjustment value and press the
[OK] key.
3) Output will be made for 30 sec.
<Adjustment specification>
∗
The input value is in the increment of –25V.
B. Mechanism section
(1) OC image lead edge position/Sub scanning
magnification ratio/Original offset auto adjustment
1) Set the test chart (UKOG-0011QSZZ) on the OC table.
2) Execute SIM 48-3.
3) Make a copy.
(2) Print start position adjustment
1) Execute SIM 50-5.
Select the mode with the arrow keys, enter the adjustment value
with the 10-key, and press the [OK] key.
with the 10-key, and press the [OK] key.
Pressing the [START] key makes a print.
Pressing the [RETURN] key returns to the mode selection.
Setup of various copy conditions: Similar to the normal copy mode.
2) Measure the distance H between the paper lead edge and the
image print start position. Set the image print start position set
value again.
value again.
• 1 step of the set value corresponds to about 0.127mm shift.
• Calculate the set value from the formula below.
Display items
Content
Installation
range
Default
1:AE
AE
200-550
426 (–426V)
2:TEXT
Character
450 (–450V)
3:TEXT/PHOTO
Character/Photo
450 (–450V)
4:PHOTO
Photo
450 (–450V)
5:SUPER PHOTO
Super photo
400 (–400V)
6:TONER SAVE
Toner save
376 (–376V)
Display items
Content
Setting
range
Default
1:AE
AE
1-8
4 (–555V)
2:TEXT
Character
5 (–580V)
3:TEXT/PHOTO
Character/Photo
5 (–580V)
4:PHOTO
Photo
5 (–580V)
5:SUPER PHOTO
Super photo
3 (–530V)
6:TONER SAVE
Toner save
2 (–505V)
A
Sim8-1 DV BIAS COPY
1:AE 426
2:TEXT 450
3:TEXT/PHOTO 450
1/2
Sim8-2 MHV(H) COPY
1:AE 3
2:TEXT 5
3:TEXT/PHOTO 5
1/2
Display items
Content
Setting
range
Default
1:AE
AE
1-8
4 (–426)
2:TEXT
Character
5 (–450)
3:TEXT/PHOTO
Character/Photo
5 (–450)
4:PHOTO
Photo
5 (–450)
5:SUPER PHOTO
Super photo
3 (–400)
6:TONER SAVE
Toner save
2 (–375)
(Initial screen)
(Input screen)
(Executing screen)
Display
items
Content
Setting
range
Default
1:TRAY1
1st cassette
0-99
53
2:OPTION
Option cassette
1-99
3:MANUAL
Manual feed
4:DUPLEX
Back print
Sim8-3 MHV(L) COPY
1:AE 3
2:TEXT 5
3:TEXT/PHOTO 5
1/2
Set the
test chart
test chart
Sim50-5 PRINT EDGE
1:TRAY1
50
2:OPTION 50
3:MANUAL 50
1/2
50
AR-235/275 ADJUSTMENTS - 3
99 – H/0.127 (mm) = Image print start position set value <H:
Print start position measurement value (mm)>
Print start position measurement value (mm)>
∗
Fit the print edge with the paper edge, and perform the lead
edge adjustment.
edge adjustment.
Example:99 – 5/0.127 = 99 – 39.4 = about 59
FIf the set value is not obtained from the above formula, per-
FIf the set value is not obtained from the above formula, per-
form the fine adjustment.
3) Execute SIM 50-1-2 to adjust the main cassette lead edge void.
• 1 step of the set value corresponds to about 0.127mm shift.
• Calculate the set value from the formula below.
B/0.127 (mm) = Lead edge void adjustment value <B: Lead edge
void (mm)>
void (mm)>
Example: When setting the lead edge void to 2.5mm:
2.5 /0.127 = about 20
<Adjustment specification>
(3) SPF image lead edge position adjustment
1) Set a scale on the OC table as shown below.
Since the printed copy is used as a test chart, put the scale in
paralleled with the edge lines.
2) Make a copy, then use the copy output as an original to make an
SPF copy again.
3) Check the copy output. If necessary, perform the following adjust-
ment procedures.
4) Execute SIM 50-6.
5) Set the SPF lead edge position set value so that the same image is
obtained as that obtained in the previous OC image lead edge
position adjustment.
position adjustment.
<Adjustment specification>
(4) Rear edge void adjustment
1) Set a scale as shown in the figure below.
2) Set the document size to A4 (8.5" x 11"), and make a copy at
100%.
3) If an adjustment is required, follow the procedures below.
4) Execute SIM 50-1 and set the density mode to DEN-B. The cur-
rently set adjustment value is displayed.
5) Enter the set value and press the start key.
The correction value is stored and a copy is made.
<Adjustment specification>
(5) Paper off center adjustment
1) Perform this adjustment after execution of SIM 48-3.
2) Set a test chart (UKOG-0089SCZZ) on the document table.
3) Select a paper feed port and make a copy.
Compare the copy and the test chart. If necessary, perform the follow-
ing adjustment procedure.
ing adjustment procedure.
4) Execute SIM 50-10.
Select the mode with the arrow keys, enter the adjustment value
with the 10-key, and press the [OK] key.
with the 10-key, and press the [OK] key.
Pressing the [START] key makes a print.
Pressing the [RETURN] key returns to the mode selection.
Adjustment
mode
SIM
Set value
Spec value
Setting
range
Main cassette
lead edge void
lead edge void
50-1-
2
B/0.127
Lead edge void:
1 to 4mm
Image loss: 3mm
or less
1 to 4mm
Image loss: 3mm
or less
1 – 99
Print start
position
position
50-5
99 – H/0.127
5
10
0mm
0mm
5
10
2.5mm
2.5mm
Adjustment
mode
SIM
Set value
Spec value
Setting
range
SPF image
lead edge
position
lead edge
position
50-6
1 step:
0.127mm
shift
0.127mm
shift
Lead edge void:
1 – 4mm
Image loss: 3mm or less
1 – 4mm
Image loss: 3mm or less
1 – 99
Adjustment
mode
SIM
Set value
Spec
value
Setting
range
Rear edge
void
void
50-1-6
1 step: 0.127mm
shift
shift
4mm or
less
less
1 – 99
(Initial screen)
(Input screen)
(Executing screen)
A4 (8.5" x 11")
Paper rear edge
Void amount (Standard value: 4mm or less)
Scale image
Paper rear edge
Sim50-10 PRT.CENTER
1:BYPASS
50
2:TRAY1 50
3:TRAY2 50
1/2
50
AR-235/275 ADJUSTMENTS - 4
Setup of various copy conditions: Similar to the normal copy mode.
<Adjustment specification>
(6) Left edge void area adjustment
Note: Before performing this adjustment, be sure to check that the
paper off center adjustment (SIM 50-10) is completed.
1) Set a test chart (UKOG-0089SCZZ) on the document table.
2) Select a paper feed port and make two copies.
Compare the second copy and the test chart. If necessary, per-
form the following adjustment procedure.
form the following adjustment procedure.
∗
The first copy does not show the void. Be sure to check the second
copy.
copy.
3) Execute SIM 50-1.
Select the mode with the arrow keys, enter the adjustment value
with the 10-key, and press the [OK] key.
with the 10-key, and press the [OK] key.
Pressing the [START] key makes a print.
Pressing the [RETURN] key returns to the mode selection.
Setup of various copy conditions: Similar to the normal copy mode.
<Adjustment specification>
(7) Main scanning direction (FR direction) distortion
balance adjustment
1) Remove the OC glass and the right cabinet.
2) Loosen the copy lamp unit wire fixing screw.
Display
items
Content
Setting
range
Default
1:BYPASS
Manual feed
1-99
50
2:TRAY1
1st cassette
3:TRAY2
2nd cassette
4:TRAY3
3rd cassette
5:TRAY4
4th cassette
6:DUPLEX
Back print
Adjustment
mode
SIM
Set value
Spec value
Setting
range
Paper off
center
center
50-10
-2
Add 1: 0.127mm
shift to R side.
Reduce 1:
0.127mm shift to L
side.
shift to R side.
Reduce 1:
0.127mm shift to L
side.
Single:
Center
±2.0mm
Center
±2.0mm
1 – 99
Second
print surface
off-center
print surface
off-center
50-10
-6
Duplex:
Center
±2.5mm
Center
±2.5mm
(Initial screen)
(Input screen)
(Executing screen)
Display items
Content
Setting
range
Default
1:RRC-A
Original scan start position
adjustment
adjustment
1-99
43
2:RRC-B
RRC cancel adjustment
(Main cassette)
(Main cassette)
1-99
18
3:RRC-MANUAL
RRC cancel adjustment
(Manual feed cassette)
(Manual feed cassette)
1-99
18
4:RRC-OPTION
RRC cancel adjustment
(Option cassette)
(Option cassette)
1-99
18
5:RRC-DUPLEX
RRC cancel adjustment
(back of the machine)
(back of the machine)
1-99
18
6:DEN-B
Rear edge void adjustment
1-99
30
7:DEN-B-DUP
Rear edge void adjustment
(Duplex)
(Duplex)
1-99
50
8:SIDE VOID
Left edge void adjustment
(First print surface)
(First print surface)
1-99
18
9:SIDE VOID-DUP
Left edge void adjustment
(Duplex)
(Duplex)
1-99
18
10:LOSS(OC)
Image loss quantity
adjustment
adjustment
1-5
3
Sim50-1 LEAD EDGE
1:RRC-A
43
2:RRC-B 18
3:RRC-MANUAL 18
1/4 [ 1- 99]
43
Adjustment
mode
SIM
Set value
Spec
value
Setting
range
Left edge void
50-1-
8
1 step: 0.127mm
shift
shift
0.5 – 4mm
1 – 99
2)
1)
1)
3)
5)
1)
1)
4)
Wire fixing screw