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d) DC motor driver (IC504/505)
The motor driver IC is for driving the DC motor (paper feed motor and carriage motor).
This driver is a PWM (pulse-width modulation) IC that changes the current's pulse
width to control the output. It thereby controls the motor. The pulse-width control is
defined by the serial data (10 bit) from the printer controller.
e) EEPROM (IC402)
The 2 Kbit EEPROM controlled by the printer controller records the waste-ink
absorption amount, page count, and BJ cartridge removal/installation count. The
printer reads the EEPROM contents when AC power is supplied and records the data
when the power is turned off.
f) Control ROM (IC102)
The 8-bit control ROM is written with a printer control program.
g) Stepping motor driver IC (IC503)
This is a driver IC for constant-current driving of the ASF motor.
The driving method is 1-2-phase driving.
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S600
Part 3: Technical Reference
Technical
Reference