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.
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BJC-4400
Part 4: Technical Reference
Carriage Ribbon Cable
Carriage Motor
DRAM
POWER Switch
RESUME Switch
Printer Controller
CARTRIDGE Switch
MPU
Beeper
Paper Feed Motor
Control/CG ROM
Paper End Sensor
Pick-up Roller Sensor
AC Adapter
J3
J5
Carriage Motor Driver
Paper Feed Motor Driver
J1
J2
J4
Figure 4-27 Printer Electrical System
