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7.2V
BATTERY
(DC 7.2V)
SW1
POWER
LCD
BACK LIGHT
VDDH
LCD
D0-7,VSYNC,HSYNC,
SCLK,LCD AC
KEY
KEY DATA0-4,KEYEN0-2
MATRIX
3-1. DESCRIPTION OF JME-SA200
The JME-SA200 has two systems of communication paths:
. Wireless
. Wired
Wireless communication:
Communication with other JumboTron peripheral
equipment can be made by utilizing a portable telephone +
data card via PC-Card Slot.
Wired communication:
Communication with other JumboTron peripheral
equipment can be made with RS422 via a cable connected
to the CONTROL terminal (CN9).
To provide these functions, the JME-SA200 consists of the
following boards.
(1) CPU board
This board is a core unit of this set, and the CPU, program
ROM, and PC-Card Slot are mounted.
JME-SA200
SECTION 3
CIRCUIT DESCRIPTIONS
IC1
VOLTAGE
DETECTOR
DD1
5V
DC-DC
CONVERTER
INV1
INVERTER
SW12
LCD DISPLAY
DD3
DC-DC
CONVERTER
IC4
12V REG
PC
CARD
Fig. 1 Block Diagram
IC2
P.CTL
RESET
SW
DD2
3.3V
DC-DC
CONVERTER
12V
5V
3.3V
CPU BOARD
MTXD,MRTS
MRXD,MCTS
. Controls the I/O card inserted in the PC-Card Slot.
. Makes a serial communication.
. Outputs LCD display signals.
(2) SAC board
This board executes I/O processing.
. Mounts the matrix for operating the keys.
. Controls the start-up of LCD drive voltage.
. Converts serial I/F into RS422.
(3) SAP board
This board transforms the voltage input from battery into
3.3 V, 5 V, and 12 V, then outputs them.
(4) SAK board
This board repeats serial I/F signals between SAC board
and CPU board.
DATA BUS
IC3
EEPROM
ADDRESS BUS
IC2
LINE DRIVER
CN9
(D-sub 15pin)
IC3
CONTROL
LINE RECIEVER
3-1(E)
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