DOWNLOAD Sharp AL-1457D (serv.man6) Service Manual ↓ Size: 1.83 MB | Pages: 28 in PDF or view online for FREE

Model
AL-1457D (serv.man6)
Pages
28
Size
1.83 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Service manual
File
al-1457d-sm6.pdf
Date

Sharp AL-1457D (serv.man6) Service Manual ▷ View online

AL-1218/1458  DUPLEX-RELATED ITEMS  2 - 3
4. Duplex adjustment
A. Adjusting the paper reverse position in memory 
for duplex copying
This step adjusts the front surface printing (odd-number pages of a
document set) in the S-D mode copying and the leading edge position
of an image on even-number pages in the D-S mode.
That is, it covers the adjustment of the second surface printing mode
(image loss at the front edge of an image) in which image data is once
stored in memory.
The image data is read, starting from its front end in the document
delivery direction (Reference direction of document setting in the OC
mode)and stored in memory.
This stored image data is printed starting at the printing start position,
in the order of last-stored data to the first-stored data. 
In other words, the front edge image loss of the image can be adjusted
by changing the document read end position.
(Adjustment procedure)
1) Preparing test chart (Draw a scale at the rear end of one side of a
sheet of A4 white paper or letter paper)
2) Set the test chart so that the scale is positioned as shown below, in
the S-D mode.
3) Execute simulation 50-18 to make a copy and check the front edge
image loss at the area where the scale is printed.
Adjust the setting so that the front edge image loss is less than 4.0
mm in the Duplex mode.
An increase of 1 in setting represents an increase of 0.1 mm in
image loss.
B. Adjusting trailing edge void in duplex copy mode
This is the adjustment of the first surface printing mode (rear end void)
in duplex copying.
In a duplex copying operation, the paper is delivered starting from the
rear end of the first printing surface. It is therefore necessary to make a
void area at the rear end on the first printing surface to prevent paper
jam at the fusing part.
Adjustment modes:
1) Paper trailing edge void quantity 50-19 (TEXT)
This adjustment is made when the cassette paper size is
recognized. The trailing edge void quantity can be adjusted by
changing the trailing edge image laser OFF timing.
(Adjustment procedure)
(1) Paper trailing edge void quantity
1) Preparing test chart (Draw a scale at the rear end of one side of a
sheet of A/4 white paper or letter paper)
2) Set the test chart on the document glass as shown below.
3) Using the user simulation [18], set the paper size of the first
cassette.
• Letter paper: 4
• A4 paper: 3
4) Execute simulation 50-19 to turn on the TEXT lamp and make the
printing mode in OC-D mode.
Make a copy of the test chart to check the void area of the scale on
the image.
Adjust the setting so that the void area is 4 - 5 mm. An increase in 1 of
setting represents 0.1 mm in void area.
5 10
Scale (S-D mode)
5 10
The front edge of the
scale on test chart
 Front edge of paper
Void area
less than 4 mm
2nd printing surface where scale is printed (lower side)
Document guide
The trailing edge has a scale
Table glass
The trailing edge void on the first printing surface is shown above.
Paper 
Void position to be check
AL-1218/1458  DUPLEX-RELATED ITEMS  2 - 4
5. List of simulations
Sim 
No.
Kind of
main code
Sub 
code
Operation
01
Optical system
01
Mirror scan operation
06
Aging of mirror scanning
02
SPF Individual 
load operation
02
SPF sensor status display
03
Motor ON
04
Paper feed solenoid ON
05
Lamp ON check
01
Operation panel display check
02
Fusing lamp, cooling fan operation 
check
03
Copy lamp ON
06
Machine 
individual load 
operation
01
Paper feed solenoid ON
02
Resist solenoid ON
07
Aging
01
Warm-up display and aging with jam
06
Intermittent aging
08
High voltage 
output check
01
Developing bias
02
Main charger (Grid high)
03
Grid voltage (Low)
06
Transfer charger
10
Other
None Toner motor aging
14
Trouble reset
None Cancel of troubles other than U2
16
U2 trouble reset
None Cancel of U2 trouble
22
Counter display
04
JAM total counter display
05
Total counter display
08
SPF counter display
12
Drum counter display
14
P-ROM version display
17
Copy counter display
18
Printer counter display
19
Scanner mode counter display
21
Scanner counter display
22
SPF JAM counter display
24
Special counter 
clear
01
JAM total counter clear
04
SPF counter clear
07
Drum counter clear
08
Copy counter clear
09
Printer counter clear
13
Scanner counter clear
14
SPF JAM total counter clear
15
Scanner mode counter clear
25
Main motor ON
01
Main motor operation check (Cooling 
fan motor rotation check)
10
Polygon motor ON
Sim 
No.
Kind of
main code
Sub 
code
Operation
26
Various setup
01
Manual feed setup
02
(R) SPF setup
03
Second cassette setup
04
Machine duplex setup
06
Destination setup
07
Machine conditions check
20
Rear edge void setup
30
CE mark support control ON/OFF
38
Cancel of stop at drum life over
39
Memory capacity check
40
Polygon motor OFF time setup 
(Time required for turning OFF after 
completion of printing)
42
Transfer ON timing control setup
43
Side void setup
44
SPF document rear edge read setup
62
Energy-save mode copy lamp setup
63
Fan control select setup
30
Sensor operation 
check (Standard 
provision)
01
Paper sensor status display
43
Fusing 
temperature 
setup
01
Fusing temperature setup (Normal 
copy)
04
Fusing temperature setup 2
05
Fusing temperature setup in duplex 
copy
09
Setup of fusing control of postcard 
size paper
46
Exposure 
adjustment
01
Copy density adjustment (300dpi)
02
Copy density adjustment (600dpi)
18
Image contrast adjustment (300dpi)
19
γ
 table setup or AE operation mode 
setup
20
SPF exposure correction
29
Image contrast adjustment (600dpi)
31
Image sharpness adjustment
32
Copier color reproduction setup
48
Magnification 
ratio correction
01
Front/rear (main scanning) direction 
and scan (sub scanning) direction 
magnification ratio adjustment
49
01
Flash ROM program writing mode
50
Lead edge 
adjustment
01
Lead edge image position
10
Center offset adjustment
18
Memory reverse position adjustment 
in duplex copy
19
Duplex copy rear edge void 
adjustment
51
Timing 
adjustment
02
Resist quantity adjustment
53
08
SPF scan position automatic 
adjustment
61
Laser system 
operation
03
Polygon motor check 
(HSYNC output check)
63
Shading
01
Shading check
64
Self print 
01
Self print
AL-1218/1458  DUPLEX-RELATED ITEMS  2 - 5
6. Contents of simulations
Input method: Clear key 
 Exposure Select key 
 Clear key 
 Exposure Select key
Main 
code
Sub 
code
Content
50
18
Memory reverse position adjustment in duplex copy
When this simulation is executed, the current setup value of correction is displayed. Enter the correction value with the 10-key and 
press the PRINT switch, and the entered value will be saved. (Correction value 1 – 99, correction zero = 0, or 50) When the correction 
value is set to 0, the correction value is written as 50.
Front surface printing in the S-D mode and printing on even pages in the D-S mode are reverse memory copy operations from the 
document rear edge section.
When, therefore, the output image print position adjustment is required, adjust as follows:
In the reverse memory copy operation, if the document scan direction is in the direction of the arrow in the figure, the scan rear edge 
section of the image is printed first.
When, therefore, the print lead edge is shifted, set the reference chart so that the reference position is in the rear edge section, and use 
this simulation to adjust so that the print image lead edge comes to the lead edge.
Since printing is performed by processing the scanned image from the scan end position to the scan lead edge, the print lead edge 
position adjustment is performed by changing the end data position stored in memory with the simulation setup value.
19
Duplex copy rear edge void adjustment
Used to adjust the rear edge void quantity in duplex copy.
(Operating procedure)
When this simulation is executed, the current setup value is displayed the current setup value is displayed in two digits. (Center value: 
50 However, setup 50 = setup 0) When the correction value is set to 0, the correction value is written as 50. Press the copy mode select 
key to select your desired copy mode, and the display will change. Enter the adjustment value with the 10-key and press the PRINT 
switch, and the setup value will be saved and a copy will be made. (The paper information is cleared for every copying.) Press the clear 
key to save the setup value and exit from the  simulation mode. (Increasing the setup value by 1 increases the void quantity by about 
0.1mm.)
Print lead edge
Lead edge void (1)
Print start position
Rear edge void
Print rear edge
Document transport direction
Scan lead edge
Scan end position
(Default: Scan cut by void (1))
Scan direction
Scan rear edge
Paper transport direction
Adjustment mode
Lamp ON
Paper rear edge void quantity
TEXT lamp
Print start position (Duplex back)
PHOTO lamp
Memo
Page of 28
Display

Click on the first or last page to see other AL-1457D (serv.man6) service manuals if exist.