AR-M620 (serv.man18). (7) Settings and adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 27

AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 27

1) Make a copy at 100% magnification by entering "100" into the

(MAGNIFICATION) field and then pressing the Start key, and
check the trailing edge void area.

(Standard setting) Trailing edge void area: 3.5 mm

If the trailing edge void area is not at an acceptable level, do the follow-
ing steps.

2) Repeat the process of changing the (TRAIL EDGE) adjustment

value and then pressing the Start key until attaining an acceptable
level. 

Repeat the above adjustments until acceptable results are
obtained.

1) Set the (SIDE) adjustment value to 20 by entering "20" into the

(SIDE) adjustment value field and then pressing the P key. 

Note that changing this adjustment value shifts the image position
in the front/rear frame direction.

1) Make a copy at 100% magnification by entering "100" into the

(MAGNIFICATION) field and then pressing the Start key, and
check the front/rear frame direction void area. 

(Standard settings)

Front frame side void area = 3.5 mm, rear frame side void area =
3.5 mm, sum of front/rear frame direction void area = 7.0 mm

If the front/rear frame direction void area is not at an acceptable level,
do the following steps.

2) Repeat the process of changing the (FRONT/REAR) adjustment

value and then pressing the Start key until attaining an acceptable
level.  

Repeat the above adjustments until acceptable results are obtained. 

Note: If the front and rear frame side void areas are not equal, adjust

the image off-center position using Simulation 50-5.

This adjustment is needed in the following situations: 

• The MFP control PWB has been replaced.

• The EEPROM on the MFP control PWB has been replaced.

• The scan control PWB has been replaced.

• The EEPROM on the scan control PWB has been replaced.

• The scanner (reading) section has been disassembled. 

• The scanner (reading) unit has been replaced. 

• U2 trouble has occurred. 

• The SPF section has been disassembled. 

• The SPF unit has been replaced. 

This adjustment is intended to adjust the scanner read position in SPF-
mode front face scan. 

An incorrect adjustment would deviate the scanner stop position from
the required position, thus possibly causing a shadow of the original
table to appear at the leading edge of an image generated by SPF
(front-face) mode scan. 

1) Make a copy in SPF (front-face) mode, and make sure that the

printed image at the leading edge of the copied image is free from
shadows.

If the printed image at the leading edge of the copied image contains a
shadow of the original table, then do the following steps. 

2) Go through the modes specified in Simulation 53-8.

3) Enter the adjustment value and press the Start key. 

Repeat the above adjustments until an acceptable result is obtained.

Papar tail edge

TV  = 3.5 mm

No Image

Void (TV)

FV+RV = 7.0 mm

No Image

No Image

Void (FV)

Void (RV)

Select 2, and 
press [START] key. 

Press [START] key, or 
press [CUSTOM SETTINGS] key.

Image area

Papar lead edge

Shadow image of SPF

SIMULATION 53-8

SPF SCANNING POSITION ADJUSTMENT. PRESS START.

2.MANUAL   

25

25

SIMULATION 53-8

SPF SCANNING POSITION ADJUSTMENT. INPUT VALUE 1-35, AND

PRESS START.

2.MANUAL