Adjustments; Optical Section; Copy Magnification Ratio Adjustment - Toshiba e-STUDIO202S Service Manual

[9] ADJUSTMENTS

1. Optical section

A. Copy magnification ratio adjustment
The copy magnification ratio must be adjusted in the main scan-
ning direction and in the sub scanning direction. To adjust, use
SIM 48-1.
(1) Outline
The main scanning (front/rear) direction magnification ratio adjust-
ment is made manually.
The adjustment is made by manual key operations.
The magnification ratio in the sub scanning direction is adjusted by
changing the carriage (scanner) scanning speed.
(2) Main scanning direction magnification ratio
adjustment
a. Cases when the adjustment is required
1) When the main PWB is replaced.
2) When the EEPROM in the main PWB is replaced.
3) When "U2" trouble occurs.
4) When repairing or replacing the optical section.
b. Necessary tools
• Screwdriver (+)
• Scale
c. Adjustment procedure
1) Set the scale vertically on the document table. (Use a long
scale for precise adjustment.)
2) Set the copy magnification ratio to 100%.
3) Make a copy on A4 or 8-1/2" x 11" paper.
4) Measure the length of the copied scale image.
5) Calculate the main scanning direction magnification ratio.
Main scanning direction magnification ratio
=
(When a 100mm scale is used as the original.)
Paper feed
direction
6) Check that the copy magnification ratio is within the specified
range. If it is not within the specified range, perform the follow-
ing procedures.
7) Execute SIM 48-1 to select the main scanning direction copy
magnification ratio adjustment mode.
To select the adjustment mode, use the copy mode select key.
If the magnification ratio is not in the specified range (100 ± 1.0%),
manually adjust as follows.
Main scanning direction
magnification ratio adjustment
Sub scanning direction
magnification ratio adjustment
8) Enter the new set value of main scanning direction copy mag-
nification ratio with the copy quantity set key, and press the
START button.
9) Change the set value and repeat the adjustment until the ratio
is within the specified range.
When the set value is changed by 1, the magnification ratio is
changed by 0.1%.
(3) Sub scanning direction copy magnification ratio
a. Cases when the adjustment is required
1) When the scanner unit drive section is disassembled or the
part is replaced.
2) When the main PWB is replaced.
3) When the EEPROM in the main PWB is replaced.
4) When "U2" trouble occurs.
b. Necessary tools
• Scale
e-STUDIO202S ADJUSTMENTS 9 - 1
Copy image dimensions
X 100 (%)
Original dimension
mm
10 20 100 110 120
1/2mm
mm
10 20 100 110 120
1/2mm
Reference Comparison point
Adjustment mode Lighting lamp
TEXT lamp ON
PHOTO lamp ON
Original (Scale)
HARDENED
STAINLESS
JAPAN
150
130 140
Shizuoka
HARDENED
STAINLESS
JAPAN
150
130 140
Shizuoka
Copy
110
Default
50
50