Read Sharp AL-840 (serv.man6) Service Manual online
Adjustment mode
Adjustment
mode (Lighting)
Note
Main
scanning
direction
scanning
direction
Auto
Auto copy
mode lamp
mode lamp
The adjustment is made
automatically by the
software.
automatically by the
software.
Manual
Manual copy
mode lamp
mode lamp
The adjustment is made
manually.
manually.
Sub
scanning
direction
scanning
direction
Manual
Photo copy
mode lamp
mode lamp
The adjustment is made
by changing the
scanning speed.
by changing the
scanning speed.
3) Place the scale on the document table as shown below, and make
a copy in the text copy mode (100%) (Display) at a proper density.
4) Measure the copied scale length and calculate the sub scanning
direction copy magnification ratio.
Main scanning direction copy magnification ratio = Copy image
dimension/Original dimension
dimension/Original dimension
×
100%
5) Check that the copy magnification ratio is within the specified
range (100
±
1.0%).
If the copy magnification ratio is within the specified range (100
±
1.0%). the adjustment is completed.
If not, perform the following procedures.
6) Change the adjustment value of SIM 48-1 sub scanning direction
copy magnification ratio.
When the adjustment value is increased by "1", the main scanning
direction copy magnification ratio is increased by 0.1%.
direction copy magnification ratio is increased by 0.1%.
Repeat procedures 3)
∼
6) until the copy magnification ratio is
within the specified range (100
±
1.0%).
*
Preliminary work
JOB No
Content
ADJ M3/ADJ 1
Main scanning direction copy
magnification ratio adjustment
magnification ratio adjustment
*
Necessary tools
Name
Scale
Parts code/Price rank
—
*
Note
1) If this adjustment is performed when the main scanning direction
copy magnification ratio is not in the specified range (100%
±
0.1%) the proper copy magnification ratio cannot be obtained.
ADJ M4
Copy image position adjustment (Main
scanning direction)
scanning direction)
*
Adjustment value
(Test command (Simulation) (Set value))
Range (MIN)
0
Range (MAX)
99
Standard value
50
Default
50
(Copy image position (Main scanning direction))
When the copy image position is compared with the original image
position, the shift must be within 0
position, the shift must be within 0
±
2.0mm.
*
Program used
Test command (Simulation)
MODE
Normal
MAIN CODE
50
SUB CODE
10
*
Execution condition (time)
Enforcement
time
time
JOB No
Content
S 004
When any part of the scanner
section (reading) is
disassembled and replaced.
section (reading) is
disassembled and replaced.
S 009/Ua 002
When replacing MCU PWB
In case of U2 trouble
Cycle
—
Condition
When the copy image position
(main scanning direction) is not
in the specified range.
(main scanning direction) is not
in the specified range.
*
Necessary conditions
1) The copy image distortion is within the specified range.
2) The main scanning direction copy magnification ratio is within the
specified range.
3) When the paper guide position is fit with the paper width.
*
Work content
1) Make a test sheet.
Draw a line in the longitudinal direction (paper transport direction)
on A4 (11
on A4 (11
×
8.5") paper.
A6
B6
51/2
A5
B5
81/2
A4
Scale
100
110
120
130
150
140
mm
1/2mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
STAINLESS
Shizuoka
100
110
120
130
150
140
mm
1/2mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
STAINLESS
Shizuoka
110
10
20
10
20
(When a 100mm scale is used as the original)
Original (scale)
Reference
Comparison point
Copy
Note: To minimize the reading errer, measure at scale of 110 with
0±2.0mm
Original
Copy
A4(11x8.5)
Straight line
7 – 10
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