Electrical Operation; Circuit Assemblies; Main Printed Circuit Board (Mpcb); Front Panel Circuit - ENCAD CADJET 2 Service Manual

3.0

Electrical Operation

3.1

Circuit Assemblies

Four circuit assemblies are contained in the CADJET 2 plotter: the
Main Printed Circuit Board (in the right cover assembly), the front
panel circuits (in the Keypad Assembly), and the Carriage Flex
Assembly and the Carriage Rigid Board (in the moveable Carriage
Assembly).
3.1.1
The Main Printed Circuit Board (MPCB) contains six features:
1. Microprocessor (CPU)
2. Gate Array
3. Memory Circuits
4. Stepper Motor driver
5. Servo Motor driver
6. Interface Circuits:
3.1.2
The Front Panel Circuit contains two features:
1. Supertwist Display (Liquid Crystal Display, or LCD)
2. Keypad
CADJET 2

Main Printed Circuit Board (MPCB)

Serial & Centronics Parallel
Front Panel

Front Panel Circuit

Theory of Operation
2-3