AL-1622 (serv.man10). Adjustments - Sharp Copying Equipment Service Manual (repair manual)

al-1622 (serv.man10) service manual
Model
AL-1622 (serv.man10)
Pages
10
Size
339.31 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Adjustments
File
al-1622-sm10.pdf
Date

Read Sharp AL-1622 (serv.man10) Service Manual online

AL-1611/AL-1622
ADJUSTMENTS
7 – 1
[ 7 ] ADJUSTMENTS
1. ADJUSTMENT ITEM LIST
2. COPIER ADJUSTMENT
A. Process section 
(1) Developing bias voltage adjustment
Note: Use a digital multi-meter with an internal resistance of 10M
 or
more.
1) Set the digital multi-meter range to DC700V. 
2) Put the test rod of the digital multi-meter on the developing bias
voltage output check pin. 
3) Turn on the power.
4) Adjust the adjustment volume VR31 so that the output voltage is
within the specified range shown below.
<Adjustment specification>
Section
Adjustment item
Adjustment procedure/SIM No.
A
Process section
(1) Developing bias voltage output adjustment
(2) Main charger voltage output adjustment
B
Mechanism section (1) Image lead edge position adjustment
SIM 50-1
(2) Main scanning direction (FR direction) distortion 
balance adjustment
No. 2/3 mirror base unit installing position adjustment
Copy lamp unit installing position adjustment
(3) Main scanning direction (FR direction) distortion adjust-
ment
Rail height adjustment
(4) Sub scanning direction (scanning direction) distortion
adjustment
Winding pulley position adjustment
(5) Main scanning direction (FR direction) magnification
ratio adjustment
SIM 48-1
(6) Sub scanning direction (scanning direction) 
magnification ratio adjustment
a
OC mode in copying (SIM 48-2)
b
SPF mode in copying (SIM 48-5)
c
OC mode in FAX (SIM 48-6)
d
SPF mode in FAX (SIM 48-7)
(7) Off center adjustment
a
OC mode (SIM 50-13)
b
SPF mode (SIM 50-16)
(8) OC (SPF) open/close detection position adjustment
OC (SPF) open/close detection position adjustment
(9) Document size detection sensor
SIM 41-3
C Image density
adjustment
(1) Copy mode
SIM 46-1
D SPF section
(1)
SIM 48-5
(2)
SIM 50-16
(3)
SIM 52-16
Mode
Specification
Developing bias voltage
DC-400 
m
 8V
VR31
AL-1611/AL-1622
ADJUSTMENTS
7 – 2
(2) Grid bias voltage adjustment
Note: Use a digital multi-meter with an internal resistance of 10M
 or
more.
1) Set the digital multi-meter range to DC700V.
2) Put the test rod of the digital multi-meter on the grid bias voltage
output check pin. 
3) Turn on the power. 
4) Adjust the adjustment volumes (VR51, VR52) so that the output
voltage is within the specified range. (The voltage is outputted in the
grid bias high output mode during warming up, and in the grid bias
low output mode after completion of warming up.)
<Adjustment specification>
B. Mechanism section
(1) Image lead edge position adjustment (SIM 50-1)
a. OC image lead edge position adjustment
Note: In advance to this adjustment, the sub scanning magnification
ratio adjustment must be performed.
1) Set a scale on the OC table as shown below.
2) Make a copy.
3) Check the copy output. If necessary, perform the following adjust-
ment procedures.
4) Execute SIM 50-1.
5) Set the OC lead edge position set value (Exposure display <AUTO>
ON) to “99.”
The OC image scanning start position is shifted inside the docu-
ment edge.
6) Set the main cassette lead edge void adjustment value (Exposure
display <PHOTO> ON)
*
 to “1.”
The lead edge void becomes the minimum.
7) Set the print start position value (Exposure display <EXP1> ON) to
“99” and make a copy.
The print start position is shifted inside the document edge.
8) Measure the image loss R of the copied image. Enter the set value
of the image scanning lead edge position (Exposure display
<AUTO> ON) again.
•  1 step of the set value corresponds to about 0.127mm shift.
•  Calculate the set value from the formula below.
99 - R/0.127 (mm) = Image loss set value <R: Image loss measure-
ment value (mm)>
Example: 99 - 4/0.127 = 99 - 31.5 = about 67
Note: If the set value is not obtained from the above formula, per-
form the fine adjustment.
Mode
Specification
Grid bias LOW
DC-400
 m 
20V
VR52
Grid bias HIGH
DC-525
 m 
10V
VR51
5
10
5mm
4mm
*
The dimension varies depending on the model.
10
5mm
0mm
5
*
The scanning edge is set. 
   (A line may be printed by scanning the document edge.)
 
AL-1611/AL-1622
ADJUSTMENTS
7 – 3
9) Measure the distance H between the paper lead edge and the
image print start position. Set the image print start position set value
(Exposure display <EXP1> ON) again.
•  1 step of the set value corresponds to about 0.127mm shift.
•  Calculate the set value from the formula below.
99 - H/0.127 (mm) = Image print start position set value <H: Print
start position measurement value (mm)>
Example: 99 - 5/0.127 = 99 - 39.4 = about 59
Note: If the set value is not obtained from the above formula, per-
form the fine adjustment.
10) Set the main cassette lead edge void adjustment value (Exposure
display <PHOTO> ON)
*
 again.
•  1 step of the set value corresponds to about 0.127mm shift.
•  Calculate the set value from the formula below.
B/0.127 (mm) = Lead edge void adjustment value <B: Lead edge
void (mm)>
Example:  When setting the lead edge void to 2.5mm: 
2.5 /0.127 = about 20
Note: If the set value is not obtained from the above formula, per-
form the fine adjustment.
*
2nd tray lead edge void adjustment: Exposure display <AUTO +
MANUAL + PHOTO>
Multi bypass tray lead edge void adjustment: Exposure display
<MANUAL + PHOTO>
<Adjustment specification>
b. SPF image lead edge position adjustment<AL-1622 only>
1) Set a scale on the OC table as shown below.
Note: Since the printed copy is used as a test chart, put the scale in
paralled with the edge lines.
2) Make a copy, Then use the copy output as an original to make an
SPF copy again.
3) Check the copy output. If necessary, perform the following adjust-
ment procedures.
4) Execute SIM 50-1.
5) Set the SPF lead edge position set value (Exposure display <MAN-
UAL> ON) so that the same image is obtained as that obtained in
the previous OC image lead edge position adjustment.
<Adjustment specification>
5
10
0mm
0mm
*
Fit the print edge with the paper edge, and perform the 
   lead edge adjustment. 
5
10
2.5mm
2.5mm
Adjustment 
mode
SIM
LED
Set value
Spec value
Set 
range
OC image 
lead edge 
position
SIM 
50-1
AUTO
99 
R/0.127
Lead edge 
void: 1 - 4mm
Image loss: 
3mm or less
1 ~ 99
Main
cassette lead
 edge void
PHOTO
B/0.127
2nd tray lead
edge void
AUTO + 
MANUAL 
+ PHOTO
Multi bypass 
traylead edge
void
MANUAL 
+ PHOTO
Print start 
position
EXP1
99 –
H/0.127
Adjustment 
mode
SIM
LED
Set value
Spec value
Set 
range
SPF image
lead edge
position
SIM 
50-1
MANUAL
1 step:
0.127mm
shift
Lead edge
void: 1 - 4mm
Image loss:
3mm or less
1 ~ 99
AL-1611/AL-1622
ADJUSTMENTS
7 – 4
c. Rear edge void adjustment
1) Set a scale as shown in the figure below.
2) Set the document size to A4 (8.5” x 11”), and make a copy at 100%.
3) If necessary, perform the following adjustment procedure.
4) Execute SIM 50-1 and set the density mode to AUTO + PHOTO
(Rear edge void).
The currently set adjustment value is displayed.
5) Enter the set value and press the start key.
The correction value is stored and a copy is made.
Note: Before performing the 2nd print surface rear edge void
adjustment, be sure to perform the 2nd print surface lead
edge position adjustment. Never reverse the sequence.
<Adjustment specification>
d. Paper off center adjustment
1) Execute SIM 50-1 and set the density mode of AUTO + MANUAL
(Left edge void) to 1.
2) Set a test chart (UKOG-0089SCZZ) on the document table.
3) Select a paper feed port and make a copy.
Compare the copy and the test chart. If necessary, perform the fol-
lowing adjustment procedure.
4) Execute SIM 50-10.
After completion of warmup, shading is performed and the currently
set off center adjustment value of each paper feed port is displayed.
5) Enter the set value and press the start key.
The correction value is stored and a copy is made.
<Adjustment specification>
*
When SIM 48-01 (AE) is executed, the document off-center is automat-
ically set. Therefore, the off-center adjustment previously described in
5) must be adjusted again.
e. Left edge void area adjustment
Note: Before performing this adjustment, be sure to check that the
paper off center adjustment (SIM 50-10) is completed.
1) Set a test chart (UKOG-0089SCZZ) on the document table.
2) Select a paper feed port and make two copies.
Compare the 2nd copy and the test chart. If necessary, perform the
following adjustment procedure.
*
The 1st copy does not show the void. Be sure to check the 2nd
copy.
3) Execute SIM 50-1 and set the density mode to AUTO + MANUAL
(Left edge void).
The currently set adjustment value is displayed.
(When the off center adjustment previously described is performed,
“0” is displayed.)
4) Enter the set value and press the start key.
The correction value is stored and a copy is made.
<Adjustment specification>
*
When the left edge void is set with the paper off center adjusted, the
both edge void is automatically adjusted.
Mode
SIM
LED
Set value Specification
Set 
range
Rear edge
void
SIM 
50-1
AUTO + 
PHOTO
1 step:
0.127mm
shift
4mm or less 1 ~ 99
A4(8.5"  x 11")
Paper rear edge
Scale image
Paper rear edge
Void amount (Standard value: 4mm or less) 
Mode
SIM
LED
Set value
Specification
Set 
range
Paper off
center
SIM 
50-10
Selected 
tray ON
Add 1:
0.127mm shift
to R side.
Reduce 1:
0.127mm shift
to L side.
Single:
Center
 
m
 2.0mm
1 ~ 99
Mode
SIM
LED
Set value
Specification
Set 
range
Left edge void
SIM 
50-1
AUTO + 
MANUAL
1 step:
0.127mm
shift
0.5 ~ 4mm
1 ~ 99
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