Sharp AR-168N Specifications download pdf (Page 68)

AR-168N/168L ADJUSTMENTS 9 - 1

[9] ADJUSTMENTS

1. Optical section

A. Copy magnification ratio adjustment

The copy magnification ratio must be adjusted in the main scanning

direction and in the sub scanning direction. To adjust, use TC 48-01.

(1) Outline

The main scanning (front/rear) direction magnification ratio adjustment

is made manually.

The adjustment is made by manual key operations. (The zoom data

The magnification ratio in the sub scanning direction is adjusted by

changing the carriage (scanner) scanning speed.

(2) Main scanning/sub scanning direction magnification

ratio adjustment

a. Cases when the adjustment is required

1) When the main PWB is replaced.

2) When the EEPROM in the main PWB is replaced.

3) When "U2" trouble occurs.

4) When repairing or replacing the optical section.

b. Necessary tools

•Scale

c. Main scanning direction adjustment procedure

1) Set the scale vertically on the document table. (Use a long scale

for precise adjustment.)

2) Set the copy magnification ratio to 100%.

3) Make a copy on A4 or 81/2" x 11" paper.

4) Measure the length of the copied scale image.

5) Calculate the main scanning direction magnification ratio.

Main scanning direction magnification ratio

6) Check that the copy magnification ratio is within the specified

range. If it is not within the specified range, perform the following

procedures.

7) Execute TC 48-01 to select the main scanning direction copy

magnification ratio adjustment mode.

To select the adjustment mode, use the [←/→] key.

8) Enter the new set value of main scanning direction copy

magnification ratio with the copy quantity set key, and press the

[START] key.

9) Change the set value and repeat the adjustment until the ratio is

within the specified range.

When the set value is changed by 1, the magnification ratio is

changed by 0.1%.

d. Sub scanning direction adjustment procedure

1) Set the scale on the document table as shown below. (Use a long

scale for precise adjustment.)

Copy image dimensions

X 100 (%)

Original dimension

Mode

Display

item

Default

value

LED

Main scan direction

magnification ratio

F-R 50 PRINT mode lamp

OC mode sub scan

direction magnification ratio

SCAN 50 SCAN mode lamp

100 110 120 130

150

140

1/2mm

JAPAN

HARDENED

STAINLESS

Shizuoka

100

110

120 130

150

140

1/2mm

JAPAN

HARDENED

STAINLESS

Shiz uoka

110

10 20

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

Paper feed

direction

Reference

Comparison point

Original (Scale)

Copy

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Sharp AR-168N Specifications Page 68

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