2
THEORY OF
OPERATION
25

Introduction

This chapter explains the mechanical and electrical theory of opera-
tion of the ENCAD Croma24 D-Size Color Inkjet printer.
The Croma24 is a MC68322 microprocessor-based digital printer
that receives plotting instructions from a host computer through
either the RS-422 serial interface or the Centronics parallel inter-
face.

Croma24 Printer General Block Diagram

Figure 2-1 illustrates the major functional areas of the printer.
The Croma24 printer consists of two mechanical drives:
1. Paper (Media) Axis Drive
2. Carrier Axis Drive
and three main electrical assemblies:
1. MPCB (Main Printed Circuit Board)
2. Carrier Assembly
3. Power Supply
Theory of Operation