Construction Of Boards - Toshiba e-STUDIO200L/230/280 SERIES Service Manual

2.4.2

Construction of boards

[ 1 ] Construction diagram of boards
This system consists of the following including the SYS board as a main board.
Control panel
KEY
Scanner unit
CCD
INV
AC input
Main switch
[ 2 ] 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, and its peripheral circuitry. The CCD converts the reflected light by the original to analog sig-
nal and outputs it to the SLG board.
• SLG board:
This is the board to mainly control the scanning function (scanner unit) and consists of the Scanner-
CPU, ASIC, memory (Flash ROM and SRAM), A/D converter, driver for motor drive, etc. When
scanning the original, the exposure lamp and scan motor are driven by the command from the Scan-
ner-CPU. The analog signal output from the CCD board is then converted to digital signal by the A/
D converter. Image processing is performed by ASIC.
• 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.
• DSP board:
This is the board to mainly control the control panel. The panel processing CPU detecting the input
from each button and touch panel, and the lighting control circuit for the backlight of the LCD are
mounted. And it relays the control signal of the control panel from the SYS board to the LCD and
KEY board.
• KEY board:
This is the board on which each button switch and each LED on the control panel are mounted.
June 2004 © TOSHIBA TEC
DSP
NIC
SYS
SLG
PS-ACC
Cover opening/closing
interlock switch
FUS
: DC power supply line
: AC power supply line
: Signal line
Fig.2-20
2 - 25
Laser unit
LDR
LRL
SNS
ADU
LGC
SFB
HVT
e-STUDIO200L/230/280 OUTLINE OF THE MACHINE
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