Digital Equipment DECcolorwriter 520ic Service Manual Download

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Contents

PREFACE .................................................................................................... i
Summary ...................................................................................................... i
Associated Documentation............................................................................ i
FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY
INTERFERENCE STATEMENT ................................................................. ii
Contents ....................................................................................................... iii

1. GENERAL

1.1 INTRODUCTION.................................................................................. 1-1
1.2 TECHNICAL CHARACTERISTICS ..................................................... 1-2
1.3 FIRMWARE AND CHARACTER GENERATORS .............................. 1-5
Basic emulations........................................................................................... 1-5

Optional emulations:.............................................................................. 1-5
Character generator:............................................................................... 1-5
Character set: ......................................................................................... 1-6
Basic emulation optional fonts: .............................................................. 1-8

1- "Prestige Elite" card (256 Kbytes)............................................ 1-8
2- "Times Nordic" card (256 Kbytes) ............................................ 1-9
3- "Nordic" card (256 Kbytes)...................................................... 1-9

1.4 Product OPTIONS ................................................................................. 1-9

2. FUNCTIONAL DESCRIPTION

2.1 GENERAL BLOCK DIAGRAM ........................................................... 2-1
2.2 Printer Components and Internals .......................................................... 2-2
2.3 BLACK INK-JET HEAD FUNCTIONING............................................ 2-5

Ink jet head description:......................................................................... 2-5
How an Ink-jet works............................................................................. 2-6
The nozzles:........................................................................................... 2-8

2.4 COLOR INK-JET HEAD FUNCTIONING............................................. 2-10

Ink jet head description:......................................................................... 2-10
Ink jet printing functioning principle:..................................................... 2-12
The nozzles:........................................................................................... 2-12
Resistor enabling circuit specifications: ................................................. 2-13

2.5 OPERATING CONTROLS.................................................................... 2-14

Operator Panel ....................................................................................... 2-14
Key functions......................................................................................... 2-15

2.6 COLOR SELECTION LEVER ............................................................... 2-18