Sharp AL-2020, Service Manual

Page: 84 / 220

AL-2020/2035/2040/2050/2060 ADJUSTMENTS 9 - 2
c. Adjustment procedure
1) Set the scale on the document table as shown below. (Use a
long scale for precise adjustment.)
2) Set the copy magnification ratio to 100%.
3) Make a copy on A4 or 81/2" x 11" paper.
4) Measure the length of the copied scale image.
5) Calculate the sub scanning direction copy magnification ratio
using the formula below.
6) Check that the actual copy magnification ratio is within the
specified range. (100 ± 1.0%).
If it is not within the specified range, perform the following pro-
cedures.
7) Execute SIM 48-1 to select the sub scanning direction copy
magnification ratio adjustment mode.
To select the adjustment mode, use the [Exposure mode selec-
tor] key (or [
] [ ] key for the AL-2050/2060). (PHOTO lamp
ON (or SCAN mode lamp ON for the AL-2050/2060))
8) Enter the new set value of sub scanning direction copy magnifi-
cation ratio with the [Copy quantity] keys (or [Numeric] keys for
the AL-2050/2060), and press the [START] key.
Repeat procedures 1) - 8) until the sub scanning direction actual
copy magnification ratio in 100% copying is within the specified
range.
When the set value is changed by 1, the magnification ration is
changed by 0.1%.
B. Image position adjustment
There are following eleven kinds of image position adjustments,
which are made by laser control except for the image scan start
position adjustment. For the adjustments, SIM 50-01 and 50-10 are
used.
(AL-2020/2035/2040)
To select the adjustment mode with SIM 50-01, use the [Exposure
mode selector] key.
The relationship between the adjustment modes and the lighting
lamps are as shown in the table below.
To select the adjustment mode with SIM 50-10, use the [Exposure
mode selector] key.
The relationship between the adjustment modes and the lighting
lamps are as shown in the table below.
Machine with the multi manual paper feed unit
: Supported for the installing model and skipped for non-install-
ing mode.
=
Copy image dimensions
X 100 (%)
Original dimension
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
No. Mode SIM
1 Print start position
(Main cassette paper feed) 50-01
2 Print start position (Manual paper feed) 50-01
3 Image lead edge void amount 50-01
4 Image scan start position 50-01
5 Image rear edge void amount
(Cassette paper feed) 50-01
6 Image rear edge void amount
(Manual paper feed) 50-01 AL-2050
AL-2060
7 Print center offset
(Main cassette paper feed) 50-10
8 Print center offset (Manual paper feed) 50-10
Adjustment mode Lamp ON
Print start position
(Main cassette paper feed) AE, main cassette lamp
Print start position
(Manual paper feed) AE, manual feed lamp
Image lead edge void quantity TEXT lamp
Image scan start position PHOTO lamp
Image rear edge void quantity AE, TEXT, PHOTO lamp
Adjustment mode Lamp ON
Print center offset
(Main cassette paper feed) AE, main cassette lamp
Print center offset
(Manual paper feed) AE, manual paper feed
lamp
Second side center offset TEXT lamp