Main Scanning Direction (Fr Direction) Distortion Adjustment; Rear Side - Sharp AR-M207 Service Manual

(3) Main scanning direction (FR direction) distortion
adjustment
This adjustment must be performed in the following cases:
• When the mirror base drive wire is replaced.
• When the lamp unit, or No. 2/3 mirror holder is replaced.
• When a copy as shown is made.
La
Paper exit
direction
Original
1) Set A3 (11" x 17") white paper on the original table as shown below.
Allow a little space.
Glass holding plate
Fit the paper edge and
the glass holding plate edge.
2) Open the original cover and make a normal (100%) copy.
3) Measure the width of the black background at the lead edge and at
the rear edge.
Paper exit direction
La: Lead edge black background width
Lb: Rear edge black background width
If the width (La) of the black background at the lead edge is equal that
(Lb) at the rear edge, there is no need to execute the following
procedures of 4) - 7).
Lb
Copy
A3 (11" x 17") white paper
AR-M207 M165 M162 ADJUSTMENT 6-6
4) Loosen the mirror base drive pulley fixing screw on the front frame
side or on the rear frame side.
When La < Lb
Turn the mirror base drive pulley on the front frame side in the
arrow direction A.
(Do not move the mirror base drive pulley shaft.)
When La > Lb
Turn the mirror base drive pulley on the rear frame side in the
arrow direction A.
(Do not move the mirror base drive pulley shaft.)
Front side
5) Tighten the mirror base drive pulley fixing screw.
<Adjustment specification>
La = Lb
6) Execute the main scanning direction (FR) distortion balance
adjustment previously described in 2) again.
(4) Main scanning direction (FR direction) magnification
ratio adjustment (SIM 48-1)
Note: Before performing this adjustment, be sure to check that the CCD
unit is properly installed.
1) Put a scale on the original table as shown below.
2) Execute SIM 48-1.
3) After completion of warming up, shading is operated and the current
correction value of the main scanning direction magnification ratio is
displayed on the screen.
Sim48-1 COPY MAG.
1:F-R
2:SCAN
4) Enter the set values of the items of F and R, and press [START] key.
The correction values are saved and a copy is made.

Rear side

A
B
50
50
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