Principle Of Operation - Panasonic KX-W1000 Service Manual

4.4 Principle of Operation
This chapter explains the basic operation of the electronic circuitry for this personal word processor.
This personal word processor is mainly composed of control, drive, power supply circuits, motors, print hammer,
keyboard, LCD display, FDD and sensors.
The control circuit is composed of ROM, RAM, Gate Array and CPU which controls every operation of this word
processor. The control circuit inputs the key data from the key matrix circuit which consists of 72 keys keyboard
and 10 push switches of the control panel. Then controls the 480 x 128 dots LCD, drive the floppy disk drive
through the floppy disk controller, and drives the print hammer, the daisy wheel motor, the ribbon feed motor, the
paper feed motor and the carrier spacing motor through the drive circuit with sensing two magnetic sensors which
are the ribbon feed sensor and the carrier home/paper feed sensor.
Ribbon Feed Motor
Circuit Paper Feed Motor
Carrier Spacing Motor
Keymatrix
Circuit
Power Supply
Circuit
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