Sharp AL-2020 Service Manual page 116

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50 01 Lead edge image position [Function]
Used to adjust the copy image position and the lead edge void amount on copy paper. The
adjustment is made by adjusting the image scan start position at 100% and the print start posi-
tion (resist roller ON timing). When this simulation is executed, the current set value is displayed
in 2 digits. (Center value: 50)
When [Exposure mode selector] key (or [
setting mode and the display are changed.
Enter the adjustment value and press [START] key to save the set value and make a copy.
When the adjustment is made by the main cassette paper feed, the adjustment values of all the
paper feed ports become the same. (When the set value is increased by 1, shift is made by
0.1mm.)
Mode
Print start position
(Main cassette
paper feed)
Print start position
(Manual paper
feed)
Image lead edge
void amount
Image scan start
position
Image rear edge
void amount
(Cassette paper
feed)
Image rear edge
void amount
(Manual paper
feed)
* When printing with the manual paper feed tray, use paper of the letter size.
* When paper is discharged, the shifter is operated.
[Adjustment procedure]
1) 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%. (AL-2020/2035/2040)
For the AL-2050/2060, the following LED's are lighted:
• AE lamp/COPY mode lamp: (A)
• TEXT lamp/PRINT mode lamp: (B)
• PHOTO lamp/SCAN mode lamp: (C)
2) Measure the image loss (Rmm) of the scale.
Set C = 10 x R (mm). (Example: Set to 40.)
When the value of C is increased by 10, the image loss is decreased by 1mm. (Default: 50)
3) Measure the distance (Hmm) from the paper lead edge to the image print start position.
Set A = 10 x H (mm). (Example: Set to 50.)
When the value of A is increased by 10, the image lead edge is moved to the paper lead
edge by 1mm. (Default: 50).
4) Set the lead edge void amount to
B = 50 (2.5mm). (Default: 50)
When the value of B is increased by
10, the void is extended by about
0.1mm. (For 25 or less, however, the
void amount is regarded as 0.)
∗ The SPF/RSPF adjustment is made
by adjusting the SPF/RSPF image
scan start position after OC
adjustment.
[Operation]
The operation is similar to simulation 46-
01.
AL-2020/2035/2040/2050/2060 SIMULATION, TROUBLE CODES 10 - 26
Details of function/operation
] [ ] key for the AL-2050/2060) is pressed, the
Display item LED
(AL-2050/2060) (AL-2050/2060)
TRAY1 COPY mode lamp
Main cassette lamp
MFT COPY mode lamp
Manual paper feed lamp
DEN-A PRINT mode lamp
Main cassette lamp
RRC-A SCAN mode lamp
Main cassette lamp
DEN-B COPY mode lamp
PRINT mode lamp
SCAN mode lamp
Main cassette lamp
RRC-B COPY mode lamp
PRINT mode lamp
Manual paper feed lamp
(Example)
Display lamp
(AL-2020/2035/2040)
AE mode lamp
Main cassette lamp
AE mode lamp
Manual feed lamp
TEXT mode lamp
Main cassette lamp
PHOTO mode lamp
Main cassette lamp
AE mode lamp
TEXT mode lamp
PHOTO mode lamp
Main cassette lamp
—
Distance from the paper lead edge
to the image lead edge, H = 5mm
Image loss, R = 4mm
5mm
10mm
Default
50
50
50
50
50
50