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Part 4: Technical Reference
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.
Carriage Motor
Paper End Sensor
Pick-Up Roller Sensor
Carriage Ribbon Cable
J2
J1
Carriage Motor Drive
AC Adapter
Figure 4-20 Printer Electrical System
4-24
DOOR Switch
RESET Switch
MPU & Printer Controller
Control ROM
DRAM
Paper Feed Motor
Paper Feed Motor Driver
BJC-2000
J4
J5
J3
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