Sharp SF-2414 Service Manual Page 75

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Repeat procedures 1) to 8) until the horizontal copy magnifica-
tion ratio in the normal (100%) copy mode is within the specified
range. (SPF copy mode: Horizontal copy magnification ratio ad-
justment)
1) Set the copied scale image paper which was made in the
horizontal copy magnification ratio adjustment in the docu-
ment table copy mode so that the scale image is horizontal in
the SPF.
Note that the copy magnification ratio of the copied scale
image must be proper.
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 horizontal copy magnification ratio.
Horizontal copy magnification ratio =
Copy image size
Original size
x 100 (%)
6) Check that the actual copy magnification ratio is within the
specified range (100 ±0.8%).
If it is out of the specified range, perform the following proce-
dures.
7) Execute simulations 48-3. (C 0 0 C 48 CB 3
CB)
The set horizontal copy magnification ratio in the SPF copy
mode will be displayed in the COPIES SELECTED display.
8) Enter a new horizontal copy magnification ratio with the
numeric key and press PRINT button. The above procedure
changes the document feed speed of the SPF and the
horizontal 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 horizontal copy mag-
nification ratio in the SPF copy mode is within the specified
range.
VII. Troubles caused by improper adjustment
(7) Uniformity adjustment
I. Summary
The uniformity adjustment is performed by changing the ex-
posure plate position attached to No.1 scanner unit.
The above procedure changes the balance of light quantity
radiated onto the document.
II. Purpose
The purpose of this adjustment is to have uniform copy density.
III. Note
When this adjustment is performed, the exposure will be
changed. Therefore, the copy density adjustment must be per-
formed after this adjustment. Also, this adjustment must be per-
formed always before the copy density adjustment.
IV. Cases when the adjustment is required
1) When the reflector is replaced.
2) When the copy lamp is replaced.
3) When the exposure adjustment plate is disassembled or
replaced.
4) In maintenance
V. Necessary tools
*
Screwdriver (+)
*
A4 or 8 1/2" x 11" paper
*
Half-tone paper of A4 or 8 1/2" x 11" or larger
100 110 120
130
150
140
mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
Shizuoka
100 110 120
130
150
140
mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
Shizuoka
110
10 20
10 20
Original scale
Paper feed
direction
Reference Comparison point Copy
7 – 18
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