Sharp AR-122E N Service Manual Download Page 85

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AR-122E/152E/153E/157E SIMULATION, TROUBLE CODES 10 - 13

Front/rear (main scanning) direction and scan (sub scanning) direction magnification ratio adjustment
(1) Front/rear direction magnification ratio auto correction: The width of the reference line marked on the shading correction plate is

scanned to perform automatic correction of the front/rear (main scanning) direction magnification ratio as well as automatic setup of
the OC/document center offset value and of the image scan start position.
In addition, the black level automatic adjustment is performed simultaneously.
The OC/document center offset value and the image scan start position automatically set in this simulation, can be checked by the
respective manual setup simulation for each adjustment shown below.

(2) Front/rear direction magnification ratio manual correction: By key operations, the front/rear (main scanning) direction magnification

ratio is set by changing the setup value of the ZOOM DATA register to AISC.

(3) Scan direction magnification ratio correction: The scan direction magnification ratio in the OC mode is set by changing the scan

speed.

(4) SPF mode scan direction magnification ratio correction: The SPF mode scan direction magnification ratio is set by changing the

scan speed.

(Operating procedure)
When this simulation is executed, the current setup value is displayed in two digits. (Center value: 50) Press the copy mode select key
to select each setup mode and the setup display will change accordingly.
In the case of the front/rear direction automatic adjustment.
To perform the automatic adjustment, place the gray gradation chart (UKOG-0162FCZZ) face down so as to fit with the left center of the
platen with the darker side (Density 10) on the left of OC.

When the PRINT switch is pressed, the mirror base unit moves to the shading white board, and the width of the reference line is
scanned, and the correction value is calculated, and the value is saved.
After completion of the automatic adjustment, press the density adjustment Down key, and the black level will be displayed in
hexadecimal number (3 digits) of 12bits.
For manual adjustment, enter the adjustment value with the 10-key and press the PRINT switch, the set value will be saved and a copy
will be made. When the clear key is pressed, the value entered will be saved and the simulation will be terminated. (Increasing the
setup value by 1 increases 0.1%.)

In the front/rear direction magnification ratio automatic correction
(1) When the calculated value of the scan correction value is within ±5%, “– –” is displayed.

(Cause) Erroneous position of the reference line on the white board, improper installation of the lens unit, etc.

(2) In case of a scan error of the reference line, the jam lamp lights up.

(Cause) CCD error, no white board installed.

∗

If the automatic correction of the magnification ratio cannot provide a satisfactory result, use the manual correction.

Main
code

Sub

code

Content

OC/document center offset

→

Sim50-10