Advertisement
BJC-4400
4. PRINTER ELECTRICAL SYSTEM
4.1 Overview
The electrical system functions are handled by the logic section or power supply.
The logic section converts the data from the interface into print signals or printer operation signals and
drives the BJ cartridge and motors while monitoring the status of the sensors.
The power supply unit consists of a built in AC adapter which provides DC output to the logic board,
motors and head etc.When DC input power from the AC adapter is being supplied, all of the hardware
components are active except for the following which are inactive: All buttons except the POWER button,
and the photo interrupter's sensor.
Carriage Motor
Carriage Motor Driver
Pick-up Roller Sensor
Carriage Ribbon Cable
J3
AC Adapter
Figure 4-27 Printer Electrical System
4-37
Part 4: Technical Reference
RESUME Switch
DRAM
J5
POWER Switch
Printer Controller
CARTRIDGE Switch
Control/CG ROM
MPU
Paper Feed Motor
Paper Feed Motor Driver
Paper End Sensor
Beeper
J1
J2
J4
Advertisement
