Canon bjc-7100 Manuale Di Servizio

The printer's electrical system can functionally be split into the logic (logic board and
carriage board) and the power supply.
The logic converts the data received from the interface into print signals and printer
command signals, and drives the BJ cartridge and motors while monitoring the various
sensors.
The power supply distributes the DC input power from the AC adaptor into power
supplies to drive the logic board, motors, and print heads, etc.
When the AC adaptor is connected to a power outlet and a DC supply is therefore input
to the BJC-7100 printer (and the printer has not yet been turned on using the 

POWER

button), all buttons except the 

POWER

button are inactive, the photointerrupter

sensors are inactive, and any signals input from the interface are ignored.  In all other
respects, the hardware is active.

BJC-7100

Part 4: Technical Reference

Carriage Motor

Carriage Motor Driver

Paper Feed Motor

Paper Feed Motor Driver

CNPWR

CNLF

CNCR

CNPGS

CNHEAD1

CNHEAD2

Purge Sensor

Paper End Sensor

AC Adaptor

Pickup Roller Sensor

DRAM

RESUME Switch

Reset IC

Regulator

POWER Switch

Cartridge REPLACE Switch

POWER Indicator

Error Indicator

MPU

Control ROM

Printer Controller

EEPROM