– 21 –

Fig. 2-1 Block Diagram

1. Block Diagram

The following is the block diagram for this printer.

(16)
(16)

(8)

(8)

(16)

24V

Data (Host Computer)
Near-end
Sensor Board
RESUME
Switch
Main Logic Board
Gate Array
CPU
DC-DC Coverter
Power Supply Unit
EPROM
128 k x 16 Bit (Ver. 1)
250 k x 16 Bit (Ver. 2)
PS-RAM
128 x 16 BitPS-RAM
S-RAM
8K x 8 BitS-RAM
Chinese Char. ROM
256 k x 16 Bit (Ver. 1)
512 k x 16 Bit (Ver. 2)
EEPROM
Head Driver
Motor Driver
Cutter Driver
Sensor Circuit
Presenter
Driver
Thermal
Head
Print Mechanism
Paper
Feed
Motor
Cutter
Sensor
Presenter
Interface Board
RS-232C, RS-422A, Parallel