AL-1456 (serv.man11). Adjustments - Sharp Copying Equipment Service Manual (repair manual)

al-1456 (serv.man11) service manual
Model
AL-1456 (serv.man11)
Pages
7
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205 KB
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PDF
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Service Manual
Brand
Device
Copying Equipment / Adjustments
File
al-1456-sm11.pdf
Date

Read Sharp AL-1456 (serv.man11) Service Manual online

AL-1555 ADJUSTMENTS 9 - 1
[9] ADJUSTMENTS
1. Optical section
A. Copy magnification ratio adjustment
The copy magnification ratio must be adjusted in the main scanning
direction and in the sub scanning direction. To adjust, use SIM 48-1.
(1) Outline
The main scanning (front/rear) direction magnification ratio adjustment
is made automatically or manually.
Automatic adjustment: The width of the reference line marked on the
shading correction plate is scanned to perform the main scanning
(front/rear) direction magnification ratio adjustment automatically.
Manual adjustment: The adjustment is made by manual key
operations. (In either of the automatic and manual adjustments, the
zoom data register set value is changed for adjustment.)
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
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 main scanning direction magnification ratio. 
Main scanning direction magnification ratio
6) Check that the copy magnification ratio is within the specified
range. If it is not within the specified range, perform the following
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.
In the case of the automatic adjustment, when the PRINT switch is
pressed, the mirror base unit moves to the white plate for shading to
scan the width of the reference line, calculating the correction value
and displaying and storing this value.
After execution of the automatic adjustment, go out from the simulation
mode and make a copy to check the magnification ratio.
If the magnification ratio is not in the specified range (100±1.0%),
manually adjust as follows.
8) Set the adjustment mode to Manual with the copy mode select key.
9) Enter the new set value of main scanning direction copy
magnification ratio with the copy quantity set key, and press the
COPY button.
10) 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
=
Copy image dimensions
X 100 (%)
Original dimension
Adjustment mode
Lighting lamp
Main scanning direction auto copy 
magnification ratio adjustment
Auto exposure lamp ON
Main scanning direction manual copy 
magnification ratio adjustment
Manual exposure lamp ON
Sub scanning direction copy 
magnification ratio adjustment
Photo exposure lamp ON
SPF mode scanning direction 
magnification ratio adjustment
Auto, Manual, Photo lamp 
ON
100
110
120
130
150
140
mm
1/2mm
JAPAN
HARDENED
STAINLESS
Shizuoka
100
110
120
130
150
140
mm
1/2mm
JAPAN
HARDENED
STAINLESS
Shizuoka
110
10
20
10
20
(When a 100mm scale is used as the original.)
Paper feed
direction
Reference
Comparison point
Original (Scale)
Copy
AL-1555 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
procedures.
7) Execute SIM 48-1 to select the sub scanning direction copy
magnification ratio adjustment mode.
To select the adjustment mode, use the copy mode select key.
(Photo exposure lamp ON)
8) Enter the new set value of sub scanning direction copy
magnification ratio with the copy quantity set key, and press the
COPY button.
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 five 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, 50 - 10, 50 - 18 and SIM
50 - 19 are used.
To select the adjustment mode with SIM 50 - 01, use the copy mode
select key.
The relationship between the adjustment modes and the lighting lamps 
are as shown in the table below.
: Supported for the installing model and skipped for non-installing
mode.
To select the adjustment mode with SIM 50 - 10, use the copy mode
select 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
Machine with the single manual paper feed unit
Duplex copy rear edge void adjustment 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.
Adjustment item
Simulation
1
Print start position
50 - 01
2
Image lead edge void amount
50 - 01
Image scan start position
50 - 01
Image rear edge void amount
50 - 01
5
SPF image scan start position
50 - 01
6
Center offset
50 - 10
7
Memory reverse position adjustment in 
duplex copy
50 - 18
8
Duplex copy rear edge void adjustment
50 - 19
9
Duplex back print start position
50 - 19
Adjustment mode
Lamp ON
Print start position (Main cassette paper 
feed)
AE, main cassette lamp
Print start position (2nd cassette paper 
feed)
AE, 2nd 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
SPF image scan start position
AE, TEXT 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
OC/document center offset
AE, TEXT 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
OC/document center offset
AE, TEXT lamp
Adjustment mode
Lamp ON
Image cut rear edge void quantity 
(RSPF)
AE lamp
Paper rear edge void quantity
TEXT lamp
Print start position (Duplex back)
PHOTO lamp
RSPF (Back) original center offset
AE, TEXT, PHOTO lamps
AL-1555 ADJUSTMENTS 9 - 3
(1) Lead edge adjustment
1) Set a scale to the center of the paper lead edge guide as shown
below, and cover it with B4 or 8 1/2" x 14" paper.
2) Execute SIM 50 - 01
3) Set the print start position (AE lamp ON) (A), the lead edge void
amount (TEXT lamp ON) (B), and the scan start position (PHOTO
lamp ON) (C) to 0, and make a copy of a scale at 100%.
4) Measure the image loss amount (R mm) of the scale image.
Set C = 10 X R (mm). (Example: Set the value of C to 30.)
When the value of C is increased by 10, the image loss is
decreased by 1mm. (Default: 50)
5) Measure the distance (H mm) between the paper lead edge and
the image print start position.
Set A = 10 X H (mm). (Example: Set the value of A to 50.)
When the value of A is increased by 10, the image lead edge is
shifted to the paper lead edge by 1mm. (Default: 50)
6) Set the lead edge void amount to B = 50 (2.5mm).
When the value of B is increased by 10, the void amount is
increased by about 1mm. For 25 or less, however, the void amount
becomes zero. (Default: 50)
(2) Image rear edge void amount adjustment
1) Set a scale to the rear edge section of A4 or 11" x 8 1/2" paper size
as shown in the figure below, and cover it with B4 or 8 1/2" x 14"
paper.
2) Execute SIM 50 - 01 to select the image rear edge void amount
adjustment mode.
The set adjustment value is displayed on the copy quantity display.
3) Make a copy and measure the void amount of image rear edge.
4) If the measurement value is out of the specified range, change the
set value and repeat the adjustment procedure.
The default value is 50.
Note: The rear edge void cannot be checked with the first sheet after
entering the simulation mode, the first sheet after turning off/on
the power, or the first sheet after inserting the cassette. Use the
second or later sheet to check the rear edge void.
(3) Center offset adjustment
1) Set the self-made test chart for the center position adjustment so
that its center line is aligned with the center mark of the document
guide.
• Test chart for the center position adjustment.
Draw a line at the center of A4 or 8 1/2" x 11" paper in the paper
transport direction.
2) Execute SIM 50 - 10 to select the print center offset (cassette
paper feed) adjustment mode.
The set adjustment value is displayed on the copy quantity display.
5mm
10mm
(Example)
Distance between paper lead
edge and image: H = 5mm
Image loss:
R = 3mm
B4 or 8 1/2
 
×
 14
 paper
A4 size rear edge
Scale image
Paper rear edge
Void amount (Standard value: 2   3mm)
Document guide
Center
Copy paper
(A4 or 8 1/2
 
×
 11
)
AL-1555 ADJUSTMENTS 9 - 4
3) Make a copy and check that the copied center line is properly
positioned.
The standard value is 0 ±2mm from the paper center.
4) If the measured value is out of the specified range, change the set
value and repeat the adjustment procedure.
When the set value is increased by 1, the copy image is shifted by
0.1mm toward the rear frame.
• For the manual paper feed, change the manual paper feed
adjustment mode and perform the similar procedures.
• Since the document center offset is automatically adjusted by the
CCD which scan the reference lines (F/R) on the back of document
guide, there is no need to adjust manually.
2. Copy density adjustment
A. Copy density adjustment timing
The copy density adjustment must be performed in the following cases:
• When maintenance is performed.
• When the developing bias/grid bias voltage is adjusted.
• When the optical section is cleaned.
• When a part in the optical section is replaced.
• When the optical section is disassembled.
• When the OPC drum is replaced.
• When the main control PWB is replaced.
• When the EEPROM on the main control PWB is replaced.
• When the memory trouble (U2) occurs.
B. Note for copy density adjustment
1) Arrangement before execution of the copy density adjustment
• Clean the optical section.
• Clean or replace the charger wire.
• Check that the voltage at the high voltage section and the
developing bias voltage are in the specified range.
C. Necessary tool for copy density adjustment
• One of the following test charts:
UKOG-0162FCZZ, UKOG-0089CSZZ, KODAK GRAY SCALE
• B4 (14" x 8 1/2") white paper
• The user program AE setting should be "3."
Test chart comparison table
D. Features of copy density adjustment
For the copy density adjustment, the image data shift function provided
in the image process LSI is used.
List of the adjustment modes
E. Copy density adjustment procedure
Use SIM 46 - 01 to set the copy density for each copy mode.
For selection of modes, use the copy mode select key.
(1) Test chart (UKOG-0162FCZZ) setting
1) Place the test chart so that its edge is aligned with the A4 (Letter)
reference line on the document table. Then place a A4 (14" x 
8 1/2") white paper on the test chart and close the document cover.
(Copy A)
(Copy B)
2.0mm or less
2.0mm or less
Copy image
Copy paper
folding line
Copy image
Copy paper
folding line
Shift
Shift
(Paper feed direction)
1
10
W
2
3
4
5
6
7
8
9
UKOG-
0162FCZZ
 DENSITY
 No.
1
2
3
4
5
6
7
8
9
10
W
UKOG-
0089CSZZ
 DENSITY
 No.
0.1
0.2
0.3
0.5 1.9
0
KODAK
 GRAY
 SCALE
1
2
3
4
19
A
Auto Mode
Brightness 1 step only
Manual Mode
Brightness 5 steps. Adjustment of only the center 
brightness is made.
Photo Mode
Brightness 5 steps. Adjustment of only the center 
brightness is made.
Manual T/S 
mode
Brightness 5 steps. Adjustment of only the center 
brightness is made.
T/S Auto mode
Brightness 1 step only
Test chart
White paper
Page of 7

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