Sharp AR-M236 (serv.man5) Service Manual ▷ View online
AR-M236/M276/M237/M277 ADJUSTMENTS 7 - 3
7) 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>
(2) SPF (RSPF) image lead edge position adjustment
1) Set a scale on the OC table as shown below.
Note: 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 (RSPF) copy again.
3) Check the copy output. If necessary, perform the following adjust-
ment procedures.
4) Execute SIM 50-6.
5) Set the SPF (RSPF) lead edge position set value so that the same
image is obtained as that obtained in the previous OC image lead
edge position adjustment.
edge position adjustment.
<Adjustment specification>
(3) 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>
(4) Paper off center adjustment
1) Set a test chart (UKOG-0089SCZZ) on the document table.
2) Select a paper feed port and make a copy.
3) Execute SIM 50-10.
4) Touch the item to be adjusted.
The item and the currently set value are highlighted.
5) Press the [START] key.
The display is shifted to the copy menu.
6) Select the paper feed tray and the print density.
Enter the adjustment value with the 10-key.
7) Press the [START] key.
Copying is started.
<Adjustment specification>
(5) 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.
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 – 4mm
Image loss: 3mm
or less
1 – 4mm
Image loss: 3mm
or less
1 – 99
Print start
position
position
50-5
99 – H/0.127
Adjustment
mode
SIM
Set value
Spec value
Setting
range
SPF
(RSPF)
image lead
edge
position
(RSPF)
image 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
5
10
2.5mm
2.5mm
A4 (8.5" x 11")
Paper rear edge
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
Item
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
Void amount (Standard value: 4mm or less)
Scale image
Paper rear edge
AR-M236/M276/M237/M277 ADJUSTMENTS 7 - 4
3) Execute SIM 50-1.
4) Touch the item to be adjusted.
The item and the currently set value are highlighted.
5) Enter the adjustment value with the 10-key, and press the [START]
key.
The display is shifted to the copy menu.
The display is shifted to the copy menu.
6) Select the paper feed tray and the print density.
Enter the exposure level with the 10-key.
7) Press the [START] key.
Copying is started.
<Adjustment specification>
(6) Main scanning direction (FR direction) distortion
balance adjustment
1) Remove the OC glass, the right cabinet and the upper right side
cover.
2) Loosen the copy lamp unit wire fixing screw.
3) Manually turn the mirror base drive pulley and bring No. 2/3 mirror
base unit into contact with the positioning plate.
At that time, if the front frame side and the rear frame side of No. 2/
3 mirror base unit are brought into contact with the positioning
plate at the same time, the mirror base unit parallelism is proper.
3 mirror base unit are brought into contact with the positioning
plate at the same time, the mirror base unit parallelism is proper.
If one of them is in contact with the positioning plate, perform the
adjustment of 4).
adjustment of 4).
4) Loosen the set screw of the scanner drive pulley which is not in
contact with No. 2/3 mirror base unit positioning plate.
5) Without moving the scanner drive pulley shaft, manually turn the
scanner drive pulley until the positioning plate is brought into con-
tact with No. 2/3 mirror base unit, then fix the scanner drive pulley.
tact with No. 2/3 mirror base unit, then fix the scanner drive pulley.
Item
Content
Setting
range
Default
1
RRC-A
Original scan start position
adjustment
Lead edge position
adjustment value (OC)
adjustment
Lead edge position
adjustment value (OC)
1-99
43
2
DEN-A
Lead edge cancel
adjustment (Main cassette)
adjustment (Main cassette)
1-99
18
3
DEN-A-MANUAL Lead edge cancel
adjustment (Manual feed
cassette)
cassette)
1-99
18
4
RRC-OPTION
Lead edge cancel
adjustment (Option cassette)
adjustment (Option cassette)
1-99
18
5
RRC-DUPLEX
Lead edge cancel
adjustment (back of the
machine)
adjustment (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)
1-99
18
10 LOSS(OC)
Image loss amount
adjustment (Lead edge
image loss set value) (OC)
adjustment (Lead edge
image loss set value) (OC)
1-5
3
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
Wire fixing screw
AR-M236/M276/M237/M277 ADJUSTMENTS 7 - 5
6) Put No. 2/3 mirror base unit on the positioning plate again, push
the projections on the front frame side and the rear frame side of
the copy lamp unit to the corner frame, and tighten the wire fixing
screw.
the copy lamp unit to the corner frame, and tighten the wire fixing
screw.
(7) Sub scanning direction (scanning direction) distortion
adjustment (Winding pulley position adjustment)
This adjustment must be performed 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 as shown is made.
1) Set A3 (11" x 17") white paper on the original table as shown
below.
2) Open the original cover and make a normal (100%) copy.
3) Measure the width of the black background at the lead edge and at
the rear edge.
If the width (La) of the black background at the lead edge is equal
that (Lb) at the rear edge, there is no need to execute the following
procedures of 4) – 7).
that (Lb) at the rear edge, there is no need to execute the following
procedures of 4) – 7).
4) Loosen the mirror base drive pulley fixing screw on the front frame
side or on the rear frame side.
5) Tighten the fixing screw of the mirror base drive pulley.
<Adjustment specification>
La = Lb
6) Execute the main scanning direction (FR) distortion balance
adjustment previously described in 2) again.
(8) Main scanning direction (FR direction) distortion
balance adjustment (Rail height adjustment)
When there is no skew copy in the mirror base scanning direction and
there is no horizontal error (right angle to the scanning direction), the
adjustment can be made by adjusting the No. 2/3 mirror base unit rail
height.
there is no horizontal error (right angle to the scanning direction), the
adjustment can be made by adjusting the No. 2/3 mirror base unit rail
height.
Before performing this adjustment, be sure to perform the horizontal
image distortion adjustment in the laser scanner section.
image distortion adjustment in the laser scanner section.
This adjustment must be performed in the following cases:
• When the mirror base wire is replaced.
• When the copy lamp unit and no. 2/3 mirror unit are replaced.
• When the mirror unit rail is replaced and moved.
• When a following copy is made.
Lb
La
Original
Copy
Paper exit
direction
direction
Place a little clearance from
the rear side original guide.
the rear side original guide.
Glass holding plate
Fit the paper edge and
the glass holding plate edge.
the glass holding plate edge.
A3 (11" x 17") white paper
• When La < Lb
Turn the mirror base drive pulley on the front frame side in the
arrow direction A. (Do not move the mirror base drive pulley shaft.)
arrow direction A. (Do not move the mirror base drive pulley shaft.)
• When La > Lb
Turn the mirror base drive pulley on the rear frame side in the
arrow direction A. (Do not move the mirror base drive pulley shaft.)
arrow direction A. (Do not move the mirror base drive pulley shaft.)
Paper exit direction
La: Lead edge black background width
Lb: Rear edge black background width
Lb: Rear edge black background width
A
B
Rear side
Front side
Original
Copy A
Copy B
AR-M236/M276/M237/M277 ADJUSTMENTS 7 - 6
1) Make an original for the adjustment.
Make test sheet by drawing parallel lines at 10mm from the both
ends of A3 (11" x 17") white paper as shown below. (These lines
must be correctly parallel to each other.)
ends of A3 (11" x 17") white paper as shown below. (These lines
must be correctly parallel to each other.)
2) Make a normal (100%) copy of the test sheet on A3 (11" x 17")
paper. (Fit the paper edge and the glass holding plate edge.)
3) Measure the distances (La, Lb, Lc, Ld) at the four corners as
shown below.
When La = Lb and Lc = Ld, no need to perform the procedures 4)
and 5).
and 5).
4) Move the mirror base B rail position up and down (in the arrow
direction) to adjust.
<Adjustment specification>
La = Lb, Lc = Ld
5) After completion of adjustment, manually turn the mirror base drive
pulley, scan the mirror base A and mirror base B fully, and check
that the mirror bases are not in contact with each other.
that the mirror bases are not in contact with each other.
∗
If the mirror base rail is moved extremely, the mirror base may be in
contact with the frame or the original glass. Be careful to avoid this.
contact with the frame or the original glass. Be careful to avoid this.
(9) Main scanning direction (FR direction) magnification
ratio adjustment (SIM 48-1)
Note: Before performing this adjustment, be sure to check that the
CCD unit is properly installed.
1) Put a scale on the original table as shown below.
2) Execute SIM 48-1.
3) After warm-up, shading is performed and the current set value of
the main scanning direction magnification ratio is displayed on the
display section in 2 digits.
display section in 2 digits.
4) Manual correction mode (SIM48-1-1)
Enter the set value and press the start key.
The correction value is stored and a copy is made.
<Adjustment specification>
Note: A judgement must be made with 200mm width, and must not be
Note: A judgement must be made with 200mm width, and must not be
made with 100mm width.
• Error in the auto correction mode
10mm
10mm
10mm
10mm
Parallel line
Parallel line
White paper
La
Lb
Ld
Lc
Paper exit
direction
direction
• When La > Lb
Shift the mirror base B rail upward by the half of the difference of
La–Lb.
La–Lb.
• When La < Lb
Shift the mirror base B rail downward by the half of the difference
of Lb–La.
of Lb–La.
Example: When La = 12mm and Lb = 9mm, shift the mirror base
B rail upward by 1.5mm.
• When Lc >Ld
Shift the mirror base B rail downward by the half of the difference
of Lc–Ld.
of Lc–Ld.
• When Lc < Ld
When Lc < Ld, move the mirror base B on the paper feed side
upward.
upward.
∗
When moving the mirror base rail, hold the mirror base rail with
your hand.
your hand.
Adjustment
mode
Spec value
SIM
Set value
Setting
range
Main scanning
direction
magnification
ratio
direction
magnification
ratio
At normal:
±1.0%
±1.0%
48-
1-1
1-1
Add 1: 0.1%
increase
Reduce 1: 0.1%
decrease
increase
Reduce 1: 0.1%
decrease
1 – 99
Display
Content
Major cause
Copy quantity
display "– –"
display "– –"
The correction
value
calculated is
over 5%.
value
calculated is
over 5%.
• Improper position of reference
width line of the reference white
plate
plate
• Improper installation of CCD unit
Paper jam
lamp ON
lamp ON
Reference line
scanning error
scanning error
• Defective CCD
• No reference white plate
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