Sharp SF-2414 Service Manual download pdf (Page 67)

6) Without moving the scanner unit drive pulley shaft, manual-

ly turn the scanner unit drive pulley in the same side of the

loosened setscrew. When it makes contact with No.2 scan-

ner unit positioning plate, tighten and fix the setscrew.

(Note)

Allow a clearance of about 0.5mm between the scanner

unit drive pulley and the positioning E-ring.

7) Manually turn the scanner unit drive gear to bring No.2

scanner unit into contact with the positioning plate, and

perform the procedure of step 4).

Repeat procedures of steps 4) to 7) until the parallelism of

No.2 scanner unit is properly set.

8) With No.2 scanner unit being in contact with No.2 scanner

unit positioning plate, and insert the 1.0 mm spacer be-

tween No.1 scanner unit and upper-R frame, bring No.1

scanner unit into contact with upper-R frame, and fix it to

the scanner unit drive wire.

Procedures 1) to 8) are for adjustment of mechanical

horizontal parallelism. No.1 scanner unit and No.2 scanner

unit are fixed to the specified positions and the mechanical

horizontal parallelism of No.2 scanner unit is adjusted.

Then the optical horizontal parallelism must be adjusted in

the following procedures.

9) Set the image distortion check chart on the document table,

and make a reduction copy (90%) on an B4 or 14" x 8 1/2"

paper with the document cover open.

No.2 scanner unit

Positioning plate

Scanner unit drive pulley

Do not move

the shaft.

0.5mm

No.1 scanner unit

Upper-right frame

Wire fixing

screw

Wire fixing

screw

1.0mm spacer

50mm

B4 or "11 x 14" size

paper

7 – 10

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 130 131

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Sharp SF-2414 Service Manual Page 67

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