REV.-A
●
E05A30
gate array (3B)
The
E05A30
functions are as follows
1. Parallel l/F
2. Address decoder
3. Data address multiplexer
4. PF motor control
5. CR motor control
6. Control panel LED drive
7. Printhead drive control
● EEPROM
(lC)
The EEPROM has a 256-bit memory, and remembers the current paper position.
Other control circuits are as follows:
‘ Paper feed motor drive circuit
The paper feed motor drive circuit
drive:; the paper feed motor. The paper feed motor is a 4 phase-step
motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching
signal by the
E05A30
gate array.
● Carriage motor drive circuit
The carriage motor drive circuit drives the carriage motor. The carriage motor is a 4 phase-step motor.
The rotation of the motor (position and speed) is controlled by outputting the phase switching signal
by the
E05A30
gate array.
● Power supply circuit
The circuit converts the AC power source to the DC voltages required by the unit. Specifically, the circuit
converts the AC power to +24, +5,
and + 12 V DC.
2-9
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