(4)Using the marks on the scanner base as a guide, adjust the lens unit in either forward or backward direction.

The following table shows the error in the reproduction ratio between the copies and actual rulers compared to be measured, and the amount of adjustment of the lens unit.

Reproduction-ratio error

Amount of adjustment

 

 

0.1 %

0.5 mm

 

 

0.2 %

0.9 mm

 

 

0.3 %

1.4 mm

 

 

0.4 %

1.9 mm

 

 

0.5 %

2.4 mm

 

 

0.6 %

2.9 mm

 

 

0.7 %

3.3 mm

 

 

0.8 %

3.8 mm

 

 

0.9 %

4.3 mm

 

 

1.0 %

4.8 mm

 

 

Note:

Marking

Adjustment

 

direction

For smaller-

 

 

 

For larger-

 

 

 

than-100%

 

 

 

than-100%

 

 

 

ratios

 

 

 

ratios

 

 

 

 

 

 

 

 

 

 

 

 

Exit side

 

Lens unit

Feed side

 

If the adjustment finer than that in the above table is required, perform “Fine adjustment of polygonal

motor rotation speed”.

(5)Install the lens cover and original glass, and then make a copy to confirm the reproduction ratio.

(6)Remove the original glass and lens cover again, and then tighten the 2 screws for the lens unit to fix its position.

(7)Remove the 2 pins used for adjusting the lens magnification ratio.

(8)Reinstall the damp heater unit, lens shield bracket, lens cover and original glass.

FC-22 ADJUSTMENT

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January 2000 © TOSHIBA TEC

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Toshiba FC-22 manual Marking Adjustment Direction