Sharp Z-810 Service Manual page 55

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(When a 100mm scale is used as the original.)
5) Calculate the vertical copy magnification ratio.
Vertical copy magnification ratio =
6) Check that the actual copy magnification ratio is within the
specified range (100 ±1.0%).
If it is out of the specified range, perform the following proce-
dures.
The set vertical copy magnification ratio will be displayed in
the copy quantity display.
7) Execute simulations 48-1 and select the vertical copy mag-
nification ratio adjustment mode.
The set vertical copy magnification ratio will be displayed in
the COPY QUANTITY display.
This simulation allows the vertical copy magnification ratio
adjustment and the horizontal copy magnification ratio ad-
justment. Selection is made by the density select key.
Vertical copy magnification
ratio adjustment
Horizontal copy magnification
ratio adjustment
8) Enter a new vertical copy magnification ratio with the numeric
key and press PRINT button. The above procedure changes
the lens home position and the vertical copy magnification
ratio.
When the copy magnification ratio is set to a larger value, the
actual copy magnification ratio becomes larger.
When the copy magnification ratio is set to a smaller value,
the actual copy magnification ratio becomes smaller.
Repeat procedures 1) to 8) until the vertical copy magnification
ratio in the normal (100%) copy mode is within the specified
range.
mm
10 20
1/2mm
Paper feed
mm
10 20
direction
1/2mm
Reference
Copy image size
x 100 (%)
Original size
Auto density lamp ON
Auto/Manual density
lamp ON
Published in Heiloo, Holland.
JAPAN
100 110 120 130
JAPAN
100 110 120 130
Comparison point
110
b. Horizontal copy magnification ratio adjustment (Zoom
copy)
I. Summary
Scanning speed is changed with simulations 48-1 to adjust the
horizontal copy magnification ratio.
II. Note
Before performing this adjustment, the following adjustments
must have been completed. If not, this adjustment cannot be
performed properly.
* Image distortion adjustment
* Focus adjustment
* Vertical copy magnification adjustment
III. Cases when the adjustment is required
1) When the lens and the mirror unit are disassembled or the
part is replaced.
2) When the scanner unit drive section is disassembled or the
part is replaced.
3) When the main PWB is replaced.
4) When the RAM in the main PWB is replaced.
5) When "U2" trouble occurs.
6) When the copy image distortion adjustment is performed.
7) When the center position of copy image is adjusted.
8) When the focus is adjusted.
IV. Necessary tools
* Screwdriver (+)
* Scale
9 – 12
Original (Scale)
HARDDENCD
STAINLESS
150
140
Shizuoka
HARDDENCD
STAINLESS
150
140
Shizuoka
Copy
1/11/16