x
NovaJet 500/630/700 Series Service Manual
Table of Contents

Chapter 1 General Description ............................................................ 1-1

Introduction............................................................................................................... 1-1
Overview ...................................................................................................................1-3
Related Publications .......................................................................................... 1-3
Electrostatic Discharge (ESD) Sensitivity ................................................................. 1-3
Warnings, Cautions and Notes ................................................................................. 1-4
Printer Specifications................................................................................................ 1-5
Contents of this Service Manual................................................................................ 1-6
Technical Support..................................................................................................... 1-8

Chapter 2 Theory of Operation............................................................ 2-1

Introduction............................................................................................................... 2-1
NovaJet 500/630/700 Printers General Block Diagram .............................................. 2-1
Paper (Media) Axis Drive .......................................................................................... 2-3
The Carriage Axis Drive............................................................................................. 2-4
Media Feed and Take-Up System............................................................................. 2-5
Main Printed Wiring Assembly (MPWA) ................................................................... 2-6
Microprocessor ..................................................................................................2-7
Gate Array ......................................................................................................... 2-7
Memory Circuits................................................................................................. 2-8
Flash EEPROM........................................................................................... 2-8
DRAM.. ........................................................................................................ 2-9
Serial EEPROM......................................................................................... 2-10
Stepper Motor Controller................................................................................... 2-10
Servo Motor Controller ...................................................................................... 2-12
Interface Circuits: Serial & Parallel ................................................................... 2-14
Carriage Assembly Circuits .................................................................................... 2-15
Control Panel.... ...................................................................................................... 2-16
Power Supply ......................................................................................................... 2-17
Beeper and Fans .................................................................................................... 2-17

Chapter 3 Maintenance ........................................................................ 3-1

Introduction............................................................................................................... 3-1
Scheduled Maintenance ........................................................................................... 3-1
Cleaning Procedures .......................................................................................... 3-2
External Cleaning......................................................................................... 3-2