Drum - Toshiba e-studio550 Service Manual

7. IMAGE PROCESSING
7. 1. General Description
The following diagram shows the process from scanning of the original to data writing on the photoconduc-
tive drum surface of the digital copier.
ASIC stands for "Application Specific IC", meaning an IC designed for a particular use.
Scanning section
Original
The followings are the boards used for the image processing.
Board Number of image
processing ASIC
SLG board
(PWA-F-SLG-340)
PLG board
(PWA-F-PLG-340)
JUNE 2002 © TOSHIBA TEC
Image processing section
control section
Original glass
Scanning
Image
section
processing
[CCD]
section
[SLG]
High-quality image processing, image memory editing, editing
processing, gamma correction, gradation processing, external
1
output system interface
Smoothing processing, external input system interface, image area
1
control, laser related control
System
[SYS]
Image processing/
writing control
section
[PLG]
Machine
control section
Photo
[LGC]
conductive

drum

Function
7 - 1 e-STUDIO550/650/810 IMAGE PROCESSING
Writing section
Laser drive board
[LDR]
Polygonal motor
Semi-
conductive
laser element