AL-840 (serv.man6). AL800 840 Service Manual-Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 9

9) Measure the length of the copied scale image and calculate the

main scanning direction magnification ratio.

Main scanning direction magnification ratio = Copy image dimen-
sion/Original dimension 

×

 100%

10) Check if the copy magnification ratio is within the specified range

(100 

±

 1%).

If the copy magnification ratio is within the specified range, the
adjustment is completed.

If not, perform the following procedures.

(When the copy magnification ratio is over 100 

±

 1.0% with SIM

48-1 main scanning direction (manual) adjustment mode copy
magnification ratio is 50)

11) Change the CCD unit fixing position and repeat procedures 7) 

∼

11).

*

1) Never touch the other screws than the CCD unit fixing screw.

If the other screws are touched, insufficient resolution, image dis-
tortion, etc. may re resulted, which cannot be adjusted.

*

JOB No

Content

ADJ M2/ADJ3

Copy sub scanning direction distortion
adjustment

*

JOB No

Content

ADJ M3/ADJ 2

Sub scanning direction copy
magnification ratio

*

Name

Scale

Parts code/Price rank

—

Name

Test chart (resolution check chart)

Parts code/Price rank

UKOG-0089CSZZ

*

With the SIM 48-1 adjustment value set to 50, change the CCD unit
fixing position. If the copy magnification ratio is adjusted within the
specified range (100 

±

 1.0%), focus is adjusted as a result. (The

specified resolution is obtained.)

If the copy magnification ratio is within the specified range (100 

±

1.0%) with the SIM 48-1 adjustment value set to 50, but if the
specified resolution is not obtained, perform the following procedures.

1) Set the SIM 48-1 adjustment value to 50.

2) Change the CCD unit fixing position so that the specified resolu-

tion is obtained.

At that time, the main scanning direction copy magnification ratio
may be outside the specified range (100 

±

 1.0%).

3) Change the adjustment value of SIM 48-1 to adjust so that the

main scanning direction copy magnification ration is in the
specified range (100 

±

 1.0%).

*

(Test command (et value))

Range (MIN)

0

Range (MAX)

99

Standard value

50

Default

50

(Sub scanning direction copy magnification ratio)

Copy magnification ratio

display value

Actual copy magnification ratio

100%

Within 

±

 1.0% of the displayed

copy magnification ratio

*

Test command (Simulation)

MODE

Normal

MAIN CODE

48

SUB CODE

1

*

Enforcement
time

JOB No

Content

S 004

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

ADJ M3/
ADJ 1

When the main scanning
direction copy magnification
ratio is adjusted.

S 009/Ua 002

When the MCU PWB is
replaced

In case of U2 trouble

Cycle

—

Condition

When the sub scanning
direction copy magnification
ratio is not within the specified
range.

*

1) The copy image distortion is within the specified range.

2) The copy image is free from deflection.

3) The copy image density is within the specified range.

4) The main scanning direction coy magnification ratio is within the

specified range.

*

1) Enter the simulation 48-1 mode.

2) Select the sub scanning direction adjustment mode with the copy

picture quality mode select key.

(The currently set copy magnification ratio adjustment value is
displayed on the copy quantity display.)

100

110

120

130

150

140

mm
1/2mm

JAPAN

HARDDENCD
STAINLESS

Shizuoka

100

110

120

130

150

140

mm
1/2mm

JAPAN

HARDDENCD
STAINLESS

Shizuoka

110

10

20

10

20

(When a 100mm scale is used as the original)

Original (scale)

Reference

Comparison point

Copy

Note: To minimize the reading errer, measure at scale of 110 with

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