Gestetner A294, Service Manual

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IMAGE PROCESSING
SM 2-23 A294/A295
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Text/Photo Mode
MTF filtering is used for text/photo mode.
With UP Mode (Copy/Document Server Features – General Features – Original
Mode Level), the user can select ‘Photo Mode’, ‘Normal’, ‘Text Mode’, and ‘SP
Mode Changed’. The settings of the SP modes indicated with an asterisk (*) are
not used unless the user selects ‘Service Mode’.
Image Processing Path Related SP Modes
Input
Correction 1
•
SP4930-67 *
(Scanner Gamma Thresh Level)
•
SP4903-072 *
(Background Erase Level)
•
SP4906 *
(On/Off in Text/Photo Mode)
Input
Correction 2
•
SP4903-062
(Independent Dot Erase Level)
Filtering
•
SP4903-013 to 014 *
(Pre Filter Coefficient)
•
SP4903-039 to 054 *
(Filter Level and Strength)
•
SP4904-007
(Texture Erase Filter Level)
Magnification
•
SP2909-001
(Main Scan Magnification)
ID Control
•
SP4903-85 *
(Scanner gamma setting)
Gradation
•
SP4904-003, 005 *
(Error Diffusion)
•
SP4903-81 to 83 *, SP4904-22
(Line Width Correction Type)
Auto Shading
Background Erase
Independent Dot Erase
MTF
Main Scan Magnification
γ
Correction
Error Diffusion/
Line Width Correction
Rev. 2/2000
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA