Read Sharp AL-1622 (serv.man10) Service Manual online
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
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