Sharp AL-1611 Service Manual page 30

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)>
Fit the print edge with the paper edge, and perform the
lead edge adjustment.
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>
0mm
0mm
5
10
2.5mm
5
2.5mm
10
AL-1611/AL-1622 ADJUSTMENTS
<Adjustment specification>
Adjustment
SIM
mode
OC image
lead edge AUTO
position
Main
cassette lead PHOTO
edge void
2nd tray lead SIM AUTO +
edge void 50-1 MANUAL
+ PHOTO
Multi bypass
MANUAL
traylead edge
+ PHOTO
void
Print start
EXP1
position
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>
Adjustment
SIM LED
mode
SPF image
lead edge
SIM
MANUAL
position
50-1
7 – 3
LED Set value Spec value
99
R/0.127
Lead edge
void: 1 - 4mm
B/0.127
Image loss:
3mm or less
99 –
H/0.127
Set value Spec value
Lead edge
1 step:
void: 1 - 4mm
0.127mm
Image loss:
shift
3mm or less
Set
range
1 ~ 99
Set
range
1 ~ 99