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Chapter 2

2-32

2.4.5 Motor Driver

2.4.5.1 Media take-up PCB components

0014-2480

F-2-28

a) Driver IC (IC104)

Media take-up motor drive function

This function controls the Media take-up motor based on the control signals from the main controller.

Sensor relay function

This function relays the input signals from the Media take-up paper detection sensor and Media take-up on/off sensor to the main controller PCB.

2.4.6 Maintenance Cartridge Relay PCB

2.4.6.1 Maintenance cartridge relay PCB components

0013-6532

F-2-29

a) EEPROM (IC1)

The 2-KB EEPROM stores all information written in the EEPROM on the main controller PCB.

2.4.7 Power Supply

2.4.7.1 Power supply block diagram

0012-6414

F-2-30

The power supply converts AC voltages ranging from 100V to 240V from the AC inlet to DC voltages for driving the ICs, motor, and others.

The voltage generator circuits include the +32V generation circuit for driving motors, fans, and the +5.1V generator circuit for driving sensors, logic circuits.

When in the power saving mode, the power supply cut out the +32V and the +5.1V.

Power ON/OFF operation is controlled by the main controller PCB. When the upper cover is open, the power supply cut out only the +32V power to the carriage.

IC104

IC 1

Operation panel

Transformer

DC power supply

control circuit

+5.1V

generation circuit

+32V

generation circuit

POWER ON

Rectifying circuit