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Croma24 Service Manual
Table of Contents
Chapter 1 General Description............................................................. 17
Introduction ...............................................................................................................17
Overview ...................................................................................................................18
Related Publications ...........................................................................................18
Electrostatic Discharge (ESD) Sensitivity ..................................................................18
Warnings, Cautions, and Notes.................................................................................19
Printer Specifications ................................................................................................20
Contents of this Service Manual................................................................................21
Technical Support .....................................................................................................23
Chapter 2 Theory of Operation............................................................. 25
Introduction ...............................................................................................................25
Croma24 Printer General Block Diagram ..................................................................25
Paper (Media) Axis Drive ..........................................................................................27
The Carrier Axis Drive...............................................................................................28
Main Printed Circuit Board (MPCB)...........................................................................29
Microprocessor ...................................................................................................30
Gate Array ..........................................................................................................30
Memory Circuits..................................................................................................31
Stepper Motor Controller.....................................................................................33
Servo Motor Controller........................................................................................34
Interface Circuits: Serial & Parallel......................................................................36
Carrier Assembly Circuits..........................................................................................37
Power Supply ............................................................................................................38
System Grounding ....................................................................................................38
Front Key Controls ....................................................................................................40
Chapter 3 Maintenance ......................................................................... 43
Introduction ...............................................................................................................43
Scheduled Maintenance............................................................................................43
Cleaning Procedures ..........................................................................................44
External Cleaning .........................................................................................44
Slide Shaft Cleaning .....................................................................................44