Toshiba 3511, 4511 manual Construction of boards Construction diagram of boards

2

2.4.2 Construction of boards

(a)Construction diagram of boards

This system consists of the following including the SYS board as a main board.

Control panel

KEY DSP

Scanner unit

CCD

SDV SLG

INV

NIC

SYS

LGC

Laser unit

LDR SNS

ADU

SFB

AC input

FIL

or

FUS

Main switch

PS-ACC

Cover opening/closing interlock switch

DRV

IH

:DC power supply line

:AC power supply line

:Signal line

CCL

HVT

(b)Function of each board CCD board:

This is the board to convert the reflected light by the original to electrical signals. It consists of the CCD, A/D converter, etc. The CCD converts the reflected light by the original to three-color analog signal; red, green, blue, and the A/D converter converts each analog signal to digital.

SLG board:

This is the board to mainly control the scanning function (scanner unit) and consists of the Scanner- CPU, ASIC, memory (Flash ROM, SRAM), etc. When scanning the original, the exposure lamp and scan motor are started by the command from the Scanner-CPU. And the image processing is performed for the image data sent from the CCD by each ASIC.

SDV board:

This is the board on which the driver for driving the scan motor is mounted. The scan motor is started by the command from the Scanner-CPU.

INV board:

This is the board on which the lighting control circuit of the exposure lamp is mounted. The exposure lamp lights by the command from the Scanner-CPU.

e-STUDIO3511/4511 OUTLINE OF THE MACHINE 2 - 22 November 2003 © TOSHIBA TEC