Printer Electrical System; Overview - Canon BJC-55 Service Bulletin

Part 4: Technical Reference

4. PRINTER ELECTRICAL SYSTEM

4.1 Overview

The electrical system is handled by the control section and the power supply section.
The printer control section converts the data from the computer 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 converts the AC power to DC output using the Universal adapter
and converts it into drive power for the motors, IC, head etc. This drive power is also
used in the recharging circuit to recharge the lithium ion battery.
AD360u
Universal
Adapter
+13V
Lithium Ion Battery
24V
32.768KHz
+5V
DC-DC
EEPROM
DC-DC
Flash ROM
4Mbit
Font ROM
8Mbit
DRAM
Printer Controller Section
4Mbit
CR Motor Paper Feed
Motor Driver
Driver
Control Board
Connector
for Option
CR
Motor
Option Unit
Figure 4-26 Printer Block Diagram
CAR- RE-
POWER POWER CHARGE Error
TRIDGE SUME
RTC
SW SW SW LED LED LED
A S I C
MPU Section
23.04 24
MHz MHz
Paper
Home Paper
Feed Delivery
Carriage
Motor Position End
Sensor
Sensor Sensor
BJ
Cartridge
Scanner
Cartridge
4-34
Battery
Recharge
Controller
IC
Beeper
Host
Parallel
Computer
IF
IrDA
Host
Module Computer
BJC-50