Digital Equipment Corporation LG12 manuals

Digital equipment corporation LG12 Specifications (244 pages)

Brand: Digital-equipment-corporation | Category: Print & Scan | Size: 6.11 MB |

English

Table of contents

Text and Graphics Printer

1

FCC USER STATEMENT

2

Table of Contents

3

Preventive Maintenance

4

Troubleshooting

4

About This Manual

10

Controls and Indicators

12

Overview

13

Mechanical Controls

14

(Figure 1–2)

14

Principles of Operation

19

Line Matrix Printing

20

Uppercase

21

(Reference)

21

The Hammer Bank

22

Character Generation

24

Normal Operation

26

Control Panel

29

Common Controller Board

30

Printing

31

Transfer of dots to the

32

Fault Monitoring

34

Paper Faults

34

Ribbon and Shuttle Faults

34

CCB Hardware Summary

35

Mechanism Driver Board

39

The Ribbon Drive System

41

The Paper Feed System

42

The Reverse Paper Feed System

42

Hammer Driver Board

43

Power Filtering

44

Hammer Bank Cooling

45

Auto–Ranging Power Supply

46

Print Mechanisms

47

Ribbon Deck

49

Paper Feed Control

50

Cleaning the Printer

52

4–2 Troubleshooting

58

Introduction

59

Fault Messages

59

48 Volt Failed *

59

Dynamic RAM Fault *

61

Ham. Bank Hot

62

Ham. Coil Open *

63

Ham. Coil Short *

64

Ham. Drv. Short *

65

Mech Driver Hot *

66

Mech Driver Link *

67

Paper Jam

68

Paper Out

69

Platen Open

70

Ribbon Stall

71

Shuttle Fan *

72

Shuttle Jam

73

Software Error *

74

Troubleshooting Aids

75

Printer Confidence Check

76

CCB Diagnostic Checks

77

Diagnostic Self–Tests

83

Hex Code Printout

86

ASCII Character Set

87

Hammer Bank Service Position

90

If Print is Too Light:

96

If Print is Too Dark:

96

(Figure 5–4)

98

FD–28262–01) over the

98

(Figure 5–5)

100

Adjustments

101

Tension Check

104

Adjustment

104

Paper Out Switch Adjustment

106

Platen Gap (Figure 5–9)

110

(Figure 5–10)

112

(Figure 5–11)

114

(Figure 5–12)

116

(Figure 5–13)

120

Chapter Contents

127

Illustrated Parts Lists

129

Replacement Procedures

130

Card Cage Fan (29–29294–01)

132

Control Panel (29–29286–01)

133

Gas Shock (107961–005)

137

Hammer Bank

138

Installation

142

IMPORTANT

142

TOP VIEW

147

SIDE VIEW

147

Hammer Coil (FD–15793–01)

150

Oil Wick (29–30900–01)

152

Power Supply (29–30895–01)

157

(CCB DX 29–30901–01)

158

(Mech Driver 29–30903–01)

158

(Hammer Driver 29–30902–01)

158

Ribbon Hub (29–29296–01)

159

Ribbon Motor (29–30897–01)

160

Shuttle Motor (FD–32538–01)

161

Item Part

165

Description Notes

165

No. Number

165

From Page 6–40

168

Figure 6–8. Ribbon Deck

168

From Page 6–44

172

± 2 in–lb

173

From Page 6–48

176

± 2 in–ounce

177

See Page 6–54

178

From Page 6–52

180

± 3 in–lb

181

From Page 6–38

182

Wire Data

189

Interconnect Diagram

190

A–3Wire Data

191

A–4 Wire Data

192

A–5Wire Data

193

A–6 Wire Data

194

A–7Wire Data

195

A–8 Wire Data

196

A–9Wire Data

197

A–10 Wire Data

198

A–11Wire Data

199

A–12 Wire Data

200

A–13Wire Data

201

Part No. Description

202

133871–001

206

Sensor Harness Assembly

206

(Continued on next page.)

206

133872–001 Wire Harness, Main

208

133872–001

209

Wire Harness, Main

209

134481–001

210

Cable Assembly, High Voltage

210

Power Supply

210

134483–001

212

A–26 Wire Data

214

Mnemonics

215

PROM and Chip Locations

223

PROM Kit

224

C–3PROM and Chip Locations

225

Torque Table

227

Metric Conversion Tables

229

Printer Specifications

231

Ribbon Specifications

232

Paper Specifications

232

Printer Dimensions

233

Interfaces

233

Electrical Characteristics

234

Print Rates

235

F–6 Printer Specifications

236

Table F–1. Printing Rates

236

Duty Cycle

237

F–8 Printer Specifications

238

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