Sharp AL-1622 (serv.man20) Service Manual ▷ View online
AL-1611/AL-1622
ADJUSTMENTS
7 – 6
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.
(3) Main scanning direction (FR direction) distortion
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).
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 mirror base drive pulley fixing screw.
<Adjustment specification>
La = Lb
6) Execute the main scanning direction (FR) distartion balance adjust-
ment previously described in 2) again.
Lb
La
• 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.)
direction A. (Do not move the mirror base drive pulley shaft.)
• 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.)
A
B
Rear side
Front side
AL-1611/AL-1622
ADJUSTMENTS
7 – 7
(4) Sub scanning direction (scanning direction)
distortion 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
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 or No. 2/3 mirror unit is replaced.
• When the mirror unit rail is replaced or moved.
• When a following copy is made.
1) Making of a test sheet
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
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 with 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).
4) Move the mirror base F rail position up and down (in the arrow
direction) to adjust.
Note: If the rear side rail is used for the adjustment, the scanning posi-
tion of the white balance sheet is shifted and “E7-04” may occur
only when scanning with the SPF. Therefore it is advisable to
use the front side rail for the adjustment.
use the front side rail for the adjustment.
<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.
10mm
10mm
10mm
10mm
La
Lb
Ld
Lc
• When La > Lb
Shift the mirror base B rail upward by the half of the difference of La
– Lb.
• When La < Lb
Shift the mirror base B rail downward by the half of the difference 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.
• When Lc < Ld
Shift the mirror base B rail downward by the half of the difference of
Ld – Lc.
Ld – Lc.
*
When moving the mirror base rail, hold the mirror base rail with your
hand.
AL-1611/AL-1622
ADJUSTMENTS
7 – 8
(5) 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 warmup, shading is performed and the current set value of the
main scanning direction magnification ratio is displayed on the dis-
play section in 2 digits.
4) Select the mode and press the start key again.
5) Auto correction mode (AE lamp ON)
The mirror unit moves to the shading position, and the reference
width of the reference white plate is scanned, and the correction
value is automatically calculated from that scanned value.
value is automatically calculated from that scanned value.
The correction value is displayed and a copy is made.
6) Compare the scale image and the actual scale.
If a fine adjustment is required, switch to the manual correction
mode with the magnification ratio display key and perform fine
adjustment.
7) Manual correction mode (TEXT lamp ON)
Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
Note: A judgement must be made with 200mm width, and must not be
made with 100mm width.
• Error in the auto correction mode
*
When SIM 48-01 (AE) is executed, the main scanning direction mag-
nification ratio is automatically set. Therefore, the main scanning
direction magnification ratio adjustment previously described in 5)
direction magnification ratio adjustment previously described in 5)
must be made again.
(6) Sub scanning direction (scanning direction)
magnification ratio adjustment (SIM 48-2, SIM 48-5)
a. OC mode in copying
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, and make a nor-
mal (100%) copy.
2) Compare the scale image and the actual image. If necessary, per-
form the following adjustment procedures.
3) Execute SIM 48-2.
4) After warmup, shading is performed and the current set value of the
sub scanning direction magnification ratio is displayed on the dis-
play section in 2 digits.
play section in 2 digits.
5) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
b. RSPF sub scanning direction magnification ratio
Note:
• Before performing this adjustment, be sure to check that the CCD
unit is properly installed.
• Before performing this adjustment, the OC mode adjustment in
copying must be completed.
1) Put a scale on the original table as shown below, and make a nor-
mal (100%) copy to make a test chart.
Note: Since the printed copy is used as a test chart, put the scale in
parallel with the edge lines.
2) Set the test chart on the SPF and make a normal (100%) copy.
3) Compare the scale image and the actual image. If necessary, per-
form the following adjustment procedures.
4) Execute SIM 48-5.
5) After warmup, shading is performed.
The auto density lamp lights up and the current front surface sub
scanning direction magnification ratio correction value is displayed
in two digits on the display section.
6) Enter the set value and press the start key.
The set value is stored and a copy is made.
Mode
Specification
SIM
Set value
Set range
Main scanning
direction
magnification
ratio
direction
magnification
ratio
At normal:
m
1.0%
SIM
48-1
Add 1:
0.1% increase
0.1% increase
Reduce 1:
0.1% decrease
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
white plate
• Improper installation of CCD
unit
Paper
jam lamp ON
jam lamp ON
Reference line
scanning error
scanning error
• Defective CCD
• No reference white plate
Mode
Specification
SIM
Set value
Set range
Sub scanning
direction
magnification
ratio (OC mode)
direction
magnification
ratio (OC mode)
Normal
m
1.0%
SIM
48-2
Add 1:
0.1% increase
0.1% increase
Reduce 1:
0.1% decrease
0.1% decrease
1 ~ 99
AL-1611/AL-1622
ADJUSTMENTS
7 – 9
7) Change the mode from the duplex original mode to the simplex
original mode.
“MANUAL” lamp lights up and the current back surface sub scan-
ning direction magnification ratio is displayed in two digits on the
display section.
8) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
(7) Off center adjustment (SIM 50-13, SIM 50-16)
a. OC mode
Note: The operation of SIM 50-13 is the same as that of SIM 48-01
(Photo LED ON)
1) Make a test chart as shown below and set it so that its center line is
fit with the original guide center mark.
*
To make a test chart, draw a line on A3 or 11” x 17” paper at the
center in the paper transport direction.
2) Make a normal copy from the manual paper feed tray, and compare
the copy and the test chart.
If necessary, perform the following adjustment procedures.
3) Execute SIM 50-13.
4) After warmup, shading is performed and the current set value of the
off center adjustment is displayed on the display section in 2 digits.
5) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
b. SPF original off-center adjustment <AL-1622 only>
Note: Before performing this adjustment, be sure to check that the
paper off center is properly adjusted.
1) Make a test chart for the center position adjustment and set it on the
SPF.
<Adjustment specification>
Draw a line on a paper in the scanning direction.
2) Make a normal copy from the manual paper feed tray, and compare
the copy and the original test chart.
If necessary, perform the following adjustment procedures.
3) Execute SIM 50-16.
4) After warmup, shading is performed and the current set value of the
off center adjustment at each paper feed port is displayed on the
display section in 2 digits.
display section in 2 digits.
5) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
(8) OC (SPF) open/close detection position adjustment
<AL-1622 only>
1) Set A4 or 8 1/2” x 11” paper on the OC table.
Check that the document size display on the operation panel indi-
cates the correct size of the set paper.
2) Close the OC (SPF) with a small clearance for insertion of your
hand left, and remove the paper from the OC table.
The document size display does not change from the display in 1).
3) Open the OC (SPF) slowly until the display on the operation panel
changes (all the document size display lamps are turned off), and
measure dimension A shown below under that state.
Mode
Specification
SIM
Set value
Set range
Sub scanning
direction magni-
fication ratio
(SPF mode)
direction magni-
fication ratio
(SPF mode)
Normal
m
1.0%
SIM
48-5
Add 1:
0.1% increase
0.1% increase
Reduce 1:
0.1% decrease
0.1% decrease
1 ~ 99
Mode
Specification
SIM
Set value
Set range
Original off
center mode
(OC mode)
center mode
(OC mode)
Single:
Center
Center
m
2.0mm
SIM
50-13
Add 1:
0.1mm shift to R
side
0.1mm shift to R
side
Reduce 1:
0.1mm shift to L
side
0.1mm shift to L
side
1 ~ 99
Mode
Specification
SIM
Set value
Set range
Original off
center mode
(SPF mode)
center mode
(SPF mode)
Single:
Center
Center
m
3.0mm
SIM
50-16
Add 1:
0.1mm shift to R
side
0.1mm shift to R
side
Reduce
1: 0.1mm shift to
L side
1: 0.1mm shift to
L side
1 ~ 99
Open
A
Distance A = Table glass top - OC (SPF) knob 117"
Check the position where the display checked in
procedure 1) is changed.
procedure 1) is changed.
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