Sharp AL-1611 Service Manual page 35

(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.
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.
Mode Specification
Main scanning
direction At normal:
magnification 1.0%
ratio
• Error in the auto correction mode
Display Content
Copy quantity The correction
display "– –" value calculated
is over 5%.
Paper Reference line
jam lamp ON scanning error
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)
must be made again.
SIM Set value Set range
Add 1:
0.1% increase
SIM
1 ~ 99
48-1
Reduce 1:
0.1% decrease
Major cause
• Improper position of reference
width line of the reference
white plate
• Improper installation of CCD
unit
• Defective CCD
• No reference white plate
AL-1611/AL-1622 ADJUSTMENTS
(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.
5) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
Mode Specification
Sub scanning
direction Normal
magnification 1.0%
ratio (OC mode)
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.
7 – 8
SIM Set value Set range
Add 1:
0.1% increase
SIM
1 ~ 99
48-2
Reduce 1:
0.1% decrease