AL-840 (serv.man6). AL800 840 Service Manual-Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 11

2) Fit the check sheet with the original guide mark (reference posi-

tion).

3) Enter the simulation 50-10 mode.

And select the adjustment mode copy image position adjustment.
(Main scanning direction) with the copy picture quality mode
select key (Photo copy mode lamp is ON).

Adjustment

mode

Adjustment mode display

(LIghting)

Note

Main scanning
direction image
position

Photo copy mode lamp

Main scanning
direction image
position (SPF
mode)

Auto/Photo/Text copy
mode lamp 

Left void area

Auto copy mode lamp

Right void area

Text copy mode lamp

(The currently set copy image position adjustment value in the
main scanning direction (back-forth direction) is displayed on the
copy quantity display.

4) Make a copy on A4 (11 

×

 8.5") paper.

5) Fit the original (check sheet) tip with the copy paper tip to check

that the image position shift is within 0 

±

 2.0mm.

If not, change the adjustment value of SIM 50-10 and repeat
procedures 4) and 5) until the shift is within the specified range.

The adjustment value can be set in the range of 0 

∼

 99.

When the adjustment value is changed by 1, the copy image
position is shifted by 0.1mm in the main scanning direction.

*

JOB No

Content

ADJ M6

Copy image area (image loss, void area,
adjustment)

*

Name

Check sheet (Self-made)

Parts code/Price rank

—

*

If the copy image position in the main scanning direction cannot be
adjusted within the specified range with this adjustment, check the
paper feed operation.

*

(Simulation djustment value)

Image

lead edge

position

Image

scanning

start

position

Lead

edge void

area

Trail edge

void area

Range
(MIN)

0

0

0

0

Range
(MAX)

99

99

99

99

Standard
value

50

50

50

50

Default

50

50

50

50

(Image loss, void area adjustment value)

Image

lead edge

position

Lead
edge

image loss

Lead

edge void

area

Trail edge

void area

Range
(MIN)

—

—

1.0mm

1.0mm

Range
(MAX)

—

—

5.0mm

5.0mm

Standard
value

0mm

2.5mm

2.5mm

2.5mm

*

Test command (Simulation)

MODE

Normal

MAIN CODE

50

SUB CODE

1

*

Enforcement
time

JOB No

Content

S 004

When any part in the scanner
(reading) section is
disassembled or replaced.

S 009/Ua 002

When the MCU PWB is
repalced.

In case of U2 trouble

Cycle

—

Conditions

When the copy image area
(image loss, void area) is not
within the specififed range. 

*

1) The copy magnification ratio is within the specified range. 

2) The copy distortion is within the specified range. 

*

There are following four adjustment items. 

The image loss and the void area at the paper lead edge and the rear
edge can be adjusted by changing the adjustment values. 

Lldv

Ltv

Llv

Lrv

Llp

Liml

Copy image

Paper lead edge line

Image lead edge

Lldv : Lead edge void area
Ltv : Rear edge void area
Llv : Left void area
Lrv : Right void area
Liml : Lead edge image loss
Llp : Image lead edge position
         (Distance between the
          paperlead edge and the
          image lead edge)

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