AR-SP4. AR-SP4 (Single pass feeder) Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 7

[Function]

The SPF white correction start pixel position is automatically adjusted.
This adjustment is performed after the lens unit is replaced.

Note : When performing this adjustment, check that the CCD unit

is properly installed.

: When performing this adjustment, check that the OC mode

adjustment in copying is completed.

1) Place a scale on the document table as shown below, and make a

normal copy to make a test chart.

2) Set the test chart to the SPF and make a normal copy.

3) Compare the copy and the test chart.

If an adjustment is needed, perform the following procedures.

4) Execute SIM 8-1. The auto exposure lamp lights up.

5) The current correction value is displayed on the display section in

two digits.

6) Enter the set value, and press the START key.

The entered correction value is stored and a copy is made.

7) Change the duplex document mode to the simplex document

mode.
The MANUAL lamp lights up, and the current correction value of
the back surface sub scanning direction magnification ratio is dis-
played on the display section in two digits.

8) Enter the set value, and press the SATART key.

The entered correction value is stored and a copy is made.

<Adjustment specifications>

Mode

Spec

SIM

Set value

Set range

Magnification ratio adjustment

Normal: 

±

 1.0%

SIM 48-1

4: SPF surface magnification ratio adjustment
5: SPF back magnification ratio adjustment    

Add 1: 

0.1% increase

Reduce 1:  0.1% decrease

1 ~ 99

Note : When performing this adjustment, check that the paper off-

center is properly adjusted.

1) Set the center position adjustment test chart (made by yourself) on

the RSPF.

<Adjustment specifications>

Draw a line in the center of paper. (In the scanning direction)

2) Make a normal copy from the manual feed tray, and compare the

copy and the test chart.
If an adjustment is required, perform the following procedures.

3) Execute SIM 50-12.

4) The current off-center adjustment value is displayed on the display

section in two digits.

5) Enter the set value and press the START key.

The entered correction value is started and a copy is made.

<Adjustment specifications>

Mode

Specification

SIM

Set value

Set range

Document off-center (SPF mode)

Simplex:  Center 

±

 3.0mm

Duplex: Center 

±

 3.5mm

SIM 50-12

2: SPF surface
3: SPF back

Add 1: 

0.1mm shifted to R side.

Reduce 1:  0.1mm shifted to L side.

1 ~ 99

Sim63-7 SPF ADJ.

WHITE ADJUST

PRESS OK KEY

EXEC

Sim63-7 SPF ADJ.

WHITE ADJUST

EXEC

Sim63-7 SPF ADJ.

WHITE ADJUST

CPMPLETE

[160]

PRESS OK KEY

EXEC

Sim63-7 SPF ADJ.

WHITE ADJUST

ERROR

[  0]

PRESS OK KEY

EXEC

Press

the [OK] key.

Press

the [RETURN] key.

[Operation]

(Initial screen)

(During execution)

(Initial screen with the execution result displayed)

Normal end

Abnormal end

During execution,
"EXEC" is highlighted.

Open the SPF unit and press the [OK] key.
[    ] indicates the order number of the pixel of the white 
sheet for SPF exposure correction in the SPF position.

W h e n   t h e   a d j u s t m e n t   i s   c o m p l e t e d   n o r m a l l y ,  
"COMPLETE" is displayed, and data are written into the 
EEPROM.
W h e n   t h e   a d j u s t m e n t   i s   c o m p l e t e d   a b n o r m a l l y ,  
"ERROR" is displayed and data are not written into the 
EEPROM.

The SPF white correction start pixel = Displayed 
pixel position - 34

If the simulation is executed with the SPF unit 
closed, an error is resulted.

[CA] key: Cancels the test command.

[Interruption] key: Shifts to the sub code entry menu. 

[OK] key: Shifts to the execution menu.

Interruption is inhibited during execution.

Note: Since the printed paper is used as the test chart, 
          place the scale in parallel to both sides.