Centronics 306 Manual de usuario

MODEL

306

PRINTER

MAY

1977

Centronics No.

37400040-

Rev. I

CEnTRoniCS

data computer corp.

HUDSON,

NEW

HAMPSHIRE

03051

TELEPHONE

(603)

883

-0111

MODEL

306

PRINTER

REVISION I

MAY

1977

THE

INFORMATION

CONTAINED

HEREIN

PROPRIETARY

AND

NOT TO

RELEASED

REPRODUCED

WITHOUT

WRITTEN

PER-

MISSION OF CENTRONICS

data

computer

corp.

I:EnTROnll:S

data

computer

corp.

HUDSON,

NEW

HAMPSHIRE

03051

TELEPHONE

(603)

883

-0111

TABLE OF CONTENTS

SECTION

11.1

11.2

1.3

1'.4

1.5

2.1

2.2

4.1

4.2

4.3

4.4

4.5

4.6

4.7

General Description. . . .

Logic

Flow

Diagram. . . .

Printer Operation

1.3.1 Character Printing

1.3.2

Paper

Movement . .

1.3.3 Special Functions

Specifications Summary .

Physical Description

SECTION 1

INTRODUCTION

SECTION 2 AND 3

INSTALLATION AND OPERATION

Site Preparation .

Shipping Crate. .

Introduction

. . .

Basic

Timing . . .

Initializing the

Printer.

4.3.1 Prime . . . .

4.3.2 Select/Deselect

SECTION 4

THEORY OF OPERATION

Data

Input

. . . . .

4.4.1 Data

Input

Timing .

4.4.2 Busy

4.4.3 Decoders. . . .

Data Storage . . . . . .

4.5.1 Timing

Up Counters

and

Ram

Elements.

Character Printing . . . . . . . . .

4.6.1 Initiating Printing . . . . . .

4.6.2 Character Registration and Timing .

4.6.3 Character Generator (ROM)

4.6.4 Print

Head

Operation

4.6.5 Power Driver Circuit

Paper

Movement . .

4.7.1 Line

Feed

4.7.2 Form

Feed

4.7.3 Vertical Tab

4.7.4 Vertical Format

Unit

(Optional)

4.7.5

Bottom

Form Detection (Optional)

4.7.6 Line

Feed

Solenoid Driver . . . . .

PAGE

1-1

1-2

1-3

1-4

1-5

· 1-7/1-8

2-1

2-2

4-1

4-3

.. 4-3

· .

4··4

4-5

4-7

.4-10

.4-12

.4-14

.4-15

4-21

.4-22

.4-23

.4-24

.4-26

.4-27

.4-28

.4-29

TABLE

OF CONTENTS (CONT'D)

SECTION PAGE

4.8

4.9

4.10

5.1

5.2

6.1

6.2

6.3

6.4

Special Functions

4.8.1 Bell (Option)

4.8.2

Delete.

. .

4.8.3

Paper

Empty

4.8.4

Motor

Control (Optional)

Power Supplies . . . . . . . .

4.9.1

+5V

Regulator. . . . .

4.9.2 +12 V and -12 V Regulators.

4.9.3 +35 V Power Supply (Unregulated) .

LSI

Elements

Inputs/Outputs.

. . . . .

SECTION 5

.4-30

......

4-30

.4-30

.4-33

.........

4-33

.......

4-33

.....

4-37

REMOVAL,

REPLACEMENT

AND

ADJUSTMENT PROCEDURES*

Introduction

. . . . . . .

Mechanical Assemblies

Carriage Mechanism.

Platen . . . . . .

Paper

Pan

Driving Mechanism

Idler Pulley Assembly

Reed

Switch

Printer Base.

Frame.

. .

5-1

. . . . .

5-1

. . .

5-1

5-4

. 5-5

. . . . . . 5-7

· . 5-9

. . . . . . . . . . .

.5-12

.5-14

· . . . . .

.5-16

· . .

.5-17

. . . . . . . . . . . . .

.5-18

-5.2.1

5.2.2

5.2.3

5.2.4

5.2.5

5.2.6

5.2.7

5.2.8

5.2.9

5.2.10

5.2.11

5.2.12

5.2.13

5.2.14

5.2.15

5.2.16

5.2.17

5.2.18

5.2.19

5.2.20

5.2.21

Paper

Feed

Unit

Ribbon

Feed

Cover . . .

Operator

Panel

. . . . . .

.5-20

. . . . . . . . . . . .

.5-23

Electrical Components

Head

and Associated Assemblies.

Motor

Control Assembly

Option.

. .

Vertical Format

Unit

(VFU)

63060125-500:~

Option.

Printer Drive Mechanism, Model 306

.....

SECTION 6

Electrical Adjustment . . . .

Series

300

Preventive Maintenance .

Recommended Tools .

Troubleshooting Guide . . .

SECTION 7

· . . . . . . .5-31

· .5-31

......

5-32

.......

5-32

.......

5-33

.5-33

.5-37

...

5-38

.5-39

. .

6-1

6-5

6-6

DRAWINGS

AND

LISTS OF MATERIAILS,

ELECTRICAL

SECTION 8

MECHANICAL

DRAWINGS

AND

PARTS

LISTS

Logic Board

Timing.

. . . .

Parallel Interface Specifications .

APPENDICES

LIST

ILLUSTRATIONS

· A-1

B-1

FIGURE

PAGE

1-1

1-2

1-3

1-4

1-5

2-1

4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10

4-11

4-12

4-13

4-14

4-15

4-16

4-17

4-18

4-19

5-1

5-2

5-3

5-4

5-5

5-6

5-7

5-8

5-9

5-10

5-11

5-12

5-13

Model

306

Printer (Top and

VFU

Covers Removed)

Basic Block Diagram

Pri

nti

the

Letter

(H)

Head Components

Paper Movement Mechanism

Printer Dimensions . . . .

Model 500 Block Diagram

USASCII Code . . . . .

Data

Input

Timing

....

when Stori

Data .

Timing

RAM

Addressing During

Cycle

Forward Clutch Interconnection Diagram. . . . . . . . .

1-2

'-2

1-3

1-4

2-1

4-2

4-4

4-6

· 4-11

.4-13

.4-15

Block

Diagram Character Registration and

Timing

.....

.4-16

.4-17

.4-20

.4-22

Character

Timing.

. . . . . . . . .

. . . . . .

DCW

Timing,

Normal and Elongated Characters . . . . .

Head

Timing

. . . .

Single Line Feed

Timing

. . . . . .

Double Line Feed

Timing

. . . . .

Form

Feed and Vertical Tab

Timing

Schematic -Vertical

Format

Unit

Timing

During

Bottom

Form

Function

Motor

Control

Timin~l.

. . . . . . . . .

+5V

Regulator Interconnection

Diagram.

+12V

and -12V Regulator Interconnection Diagram

+35V

Unregulated

Supply

Interconnection Diagram

Carriage Movement

Adjustments.

. . . . . . .

Adjustment

Timing

Belt . . . . . . . . . .

Adjustment

Timing

Belt

(View

from

back

Printer, Forward)

Main

Motor

Belt

Adjustment

. . . . . . . . . . . . . . .

Bushing End-Play

Adjustment

for

Forward Clutch Shaft, (Preload Clutch)

Location

Drive Pulley Bracket . . . .

Torque

Limiting

Device (Brake) . . . . . . . . .

Reed

Switch

Assembly,

Left

. . . . . . . . . .

Left

Reed

Switch

Static-Adjustment

. . . . . . .

Two

Adjustment,

Paper Feed Mechanism

Adjustment

for

Paper Holder Gate . . . .

Removal

Belt (32)

Idler

Slide (28), and Drive Pulley (26) . . . .

Locating

Idler

Pulley Assembly . . . . . . . . . . .

iii

.4-25

.4-26

...

4-28

.4-29

.4-32

.4-34

.4-35

.4-36

.....

5-4

· 5-8

....

5-9

· 5-11

.5-12

.5-14

.5-15

.5-16

.5-19

.5-20

.5-22

. 5-25

LIST OF

ILLUSTRATIONS

(CONT'D)

FIGURE PAGE

5-14

5-15

5-16

5-17

5-18

5-19

5-20

5-21

5-22

5-23

5-24

5-25

5-26

5-27

5-28

5-29

6-1

6-2

6-3

6-4

6-5

7-1

7-2

7-3

7-4

7-5

7-6

7-7

7-8

7-9

7-10

7-11

7-12

7-13

7-14

7-15

7-16

7-17

8-i

8-1

8-2

8-3

8-4

8-5

8-6

8-7

Locating Dimension

for

Ribbon

Feed

Rack . . . " . . . . . . . . . . . . 5-26

Rack and Pinion Adjustment, Ribbon Mechanism .

. . . . . . . . . . .

.5-26

Locating Dimension

for

Left

Ribbon Holder Plate

with

Respect

Rear Guide Bar . 5-27

Locating Dimension

for

Right Ribbon Holder Plate

with

Respect

Rear Guide

Bar.

5-28

Left

Operator and Stopper

Adjustment

. . . . .

Ribbon

Feed

Plate and Guide Bar

(Left

Side).

. . . . . . . . . .

Adjusting Nuts

for

Right Pawl Operator Movement . . . .

Right Pawl Operator Starting

Position.

. . . . . . .

Pawl, Ratchet and

Cam

Movement . . . . . . .

. .

Spur on

Left

Releaser

L-174) and Roller

L-146) .

Establishing

Timing

Fence Location and Parallelism

Fence

Adjustment

and Optics Housing . . . . .

Vertical and Horizontal

Alignment

Single Track Optics Housing

Motor

Control Location and

Installation.

. . . . . . . . . .

Paper Tape Reader

Adjustment

. . . . . . . . . . . . .

Location

Subassemblies/Parts

Figure

Symbol Reference

Carriage Assembly and

Timing

Fence

Paper

Feed

Assembly . . "

Ribbon

Feed

Assembly . " . . .

Idler and Ribbon Feed Drive . . . . . . . .

Drive Assembly . . . . " . . . . . . . .

Schematic Diagram, Logic/Power Supply Board, 300/fiOO Series .

Schematic Diagram, Power Driver Board (Sheet 1

2t . . .

Schematic Diagram, Power Driver Board (Sheet 2

2t . . .

Schematic Diagram, Video

Amplifier

. . . . . . . .

Schematic Diagram, Interconnection Diagram, Connector Card

Schematic Diagram,

Multitap

50/60

Transformer . .

Wiring Diagram, Printer Mechanism. . . . . . . . . . .

Schematic Diagram, Elapsed

Timing

Indicator (Option) . . .

Logic/Power Supply Board

Connections.

. . . . . . . .

Board Assembly, Logic/Power Supply Board, 300/S00 Series (Sheet 1

Board Assembly, Logic/Power Supply Board, 300/S00 Series (Sheet 2

Board Assembly, Power Driver Board

Board Assembly, Video

Amplifier

. . . . . . . .

Board Assembly, Connector Card . . . . . . .

Board Assembly, Elapsed

Time

Indicator

(Option)

Cable Assembly, Data

Input

. . . . . . .

Cable Assembly, Computer I

nput

Cable (W2)

Model

306

Subassemblies

Carriage -

. . . . . . . .

Platen -

. . . . . . . . .

Paper

Pan

. . . . . . .

Driving Mechanism (Part 1 ) -

Driving Mechanism (Part 2) -AE .

Idler Pulley -

Reed

Switch -AG . . . . . .

5-28

.5-29

.5-30

.5-31

.5-35

.5-36

.5-37

.5-39

.5-40

6-3

6-4

· . 6-5

6-5

· 7-3/7-4

· 7-5

7-6

7-7

· . 7-8

· . 7-9

.7-10

7-11

.7-12

· 7-13

.7-14

· 7-19

7-21

.7-23

.7-25

.7-29

7-31

· 8-3

· 8-5

· 8-7

8-9

.8-11

.8-13

.8-15

.8-17

LIST

ILLUSTRATIONS (CONT'D)

FIGURE

8-8

8-9

8-'10

8-11

8-12

8-13

8-14

8-15

8-16

8-17

8-18

8-119

8-20

Base -

FrCllme

Paper

Feed

-AJ

Pin Feed Assembly and Paper Drive

Shaft

Ribbon Feed -

(Part 1

Ribbon Feed -

(Part 2

Cover -

.......

Operator

Panel

. . . .

Multitap

Transformer and Electrical Components (Part 1

3) -

Electrical Components (Part 2

3) -AP

Electrical Components (Part 3

3) -

Head and Associated Assemblies.

Vertical

Format

Unit

(Option)

. . . .

NOTE

Refer

the

Engineering Change Notice (ECN) sheets

shipped

with

the

printer

for

changes

made

the

prin-

ter

which have

not

yet

been

incorporated

into

the

draw-

ings

this technical manual. Always

keep

these

Engin-

eering Change Notice sheets with

the

manual.

Revision level indications

the

lower right-hand

corner

a page reflect

what

revision

the

manual

that

page was

updated.

v/vi

PAGE

.8-19

.8-21

.8-23

.8-25

.8-2"1

.8-28

.8-31

.8-33

.8-35

.8-37

.8-39

.8-41

.8-43

SECTION 1

INTRODUCTION

This manual describes the Model

306

printer,

manufactured

Centronics Data Computer Corp-

oration.

provides general

information,

detailed

theory

operation and maintenance

information

enabling field service personnel

service the printer.

For

serial

input

other

detailed interface

information,

a separate document

for

each

interface

published

for

your

reference.

The manual

subdivided

into

eight sections,

each

with

its specific purpose.

SECTION 1

SECTION 2

SECT10N 3

SECTION 4

SECTION 5

SECTION 6

SECTION 7

SECTION a

APPENDIX

INTRODUCTION,

introduces the reader

the scope and

content

the

manual, and provides the reader

with

a general description

the printer.

INSTALLATION,

contains unpacking and installation instructions

for

the

printer.

OPE

RATION,

describes the

use

alt operator controls and indicators.

THEORY

OPERATION,

contains a detailed description

each

major

operation performed

the

printer

electronics, including

flow

charts,

timing

diagrams and

circuit

diagrams.

REMOVAL,

REPLACEMENT

AND

ADJUSTMENT

PROCEDURES, includes

step-by-step removal and replacement procedures

for

all major assembl

ies

and

sub-assemblies in the printer.

MAl

NTENANCE,

includes electrical adjustments, preventive maintenance proc-

edures, and a troubleshooting guide.

ELECTRICAL

DRAWINGS

AND

LIST

MATERIALS,

contains a complete

set

schematic,

wiring

and component board

layout

diagrams and

their

assoc-

iated list

materials

for

the electrical

portion

the printer.

MECHANICAL

DRAWINGS

AND

PARTS LISTS, includes all

printer

assembly

drawings and

their

associated

part

lists

for

the mechanical

portion

the printer.

(A) Logic Board

Timing

(B) Parallel Interface

Timing

1.1

GENERAL

DESCRIPTION (Figure 1-1)

The Model 306

printer

a medium

speed

impact

printer

which

uses

a standard 5 x 7

optional

9 x 7

dot

matrix

for

character generation.

The

unit

prints at a rate

120 characters per second, which

approximately

one

full

aO-chara-

cter line per second (including carriage return time). Paper

sprocket-fed, and paper

widths

from

inches

inches (10.2 cm -24.1

~m)

can

accommodated. The

printer

can

produce one original and

four

copies. Standard

format

consists

10 characters per inch

.horizontally

and 6 lines per inch vertically.

1-1

Rev.

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