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Section 4
Circuit Description
4-1. Outline
The electric circuit of this unit consists of a main board (MA-195 board) and peripheral boards.
The MA-195 board mounts one microcomputer and provides all controls of this unit.
There are a key button board (KY-711 board), sensor boards (SE-1142 and SE-1143 boards), and motor
board (SU-167 board) as the peripheral boards.
4-2. MA-195 Board
The MA-195 board mounts the main functions of this unit.
The MA-195 board mounts a microcomputer that controls the whole system.
There are a microcomputer's peripheral block, mechanical control block, and video signal processing
block (UP-X898MD only) as the main function blocks on the MA-195 board.
The main functions are as described below.
. Various power circuits
. Microcomputer
. Storage of firmware, setting values, and log
. USB device
. Thermal head drive
. Thermal head voltage control
. Buzzer
. Control of sensors
. LCD control
. Key input acceptance
. Control of motors
UP-X898MD only
. Video input signal processing
. USB host
. Remote control reception
. Backup lithium battery of built-in watch
4-1 (E)
UP-D898MD/X898MD
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