Centronics 351 Manuals

Centronics 351 Manuals

Manuals and User Guides for Centronics 351. We have 1 Centronics 351 manual available for free PDF download: Technical Manual

Centronics 351 Technical Manual

Centronics 351 Technical Manual (118 pages)

Brand: Centronics | Category: Printer | Size: 8 MB

Table of Contents

Table of Contents
5
Section 1-General Information
10
Scope
10
General Description
10
Physical Description
12
- Printing Mechanism
  12
- Paper Handling Mechanism
  12
- Electronics
  12
- Power Supply
  12
Printer Operation
12
- Character Printing
  12
- Paper Motion
  12
- Special Functions
  12
Related Publications
13
- Unpacking/Repacking Instructions
  13
- Users Manual
  13
- Illustrated Parts Manual
  13
1-3 Characterprinting/Papermotion

16
1-2 Major Assembliesmodel351

16
- 8085 Microprocessor System
  16
- General
  16
- Model 351 Basic Functional Block Diagram
  16
- Memory/ Interface
  18
- Parallel Interface
  18
  - Data Strobe
    19
  - Data Lines
    19
  - Input Prime
    19
  - Acknowledge
    19
  - Busy
    19
  - Demand
    19
  - Out
    19
  - Paper Empty
    19
  - Select
    19
  - Fault
    19
- Program Memory
  18
- Random Access Memory
  18
2-2

19
- Current Loop Option
  20
- Line Transceivers
  20
- Motor Drive Circuits
  20
  - Carriage Motor Drive
    20
  - Ribbon Motor Drive
    21
  - Paper Feed Motor Drive
    21
- Serial Data Connector
  20
- Serial Interface
  20
- Carriage Drive and Ribbon Drive Circuits
  21
- Paper Feed Stepper Motor Driver
  22
- DC Power Requirements
  23
- Print Head Drive Circuit
  23
- Printer Interlock Circuit
  23
- Programmable Interval Timer Circuit
  23
- Video Timing Circuit
  23
  - TACH ( - ) and TACH ( +) Signals
    23
- Data Link
  24
- Basic Troubleshooting
  25
  - Self-Test Printout
    26
- Maintenance Summary
  25
- Section 3-Maintenance
  25
- Troubleshooting Flow Charts
  26
- Troubleshooting Guide
  26
3-3

34
3-3 Basictroubleshootingflow Chart(Sheet2 of 2)

34
3-4 no Power-Up(Deadprinter)Troubleshootingflowchart

34
3-8 Print Headmovement,Papermovement,No Printouttroubleshooting

40
3-7

40
4 Optical Sensor and Encoder/Timing Disc

50
- Mechanical Adjustment
  50
- Paper Drive Belt Adjustment
  50
- Paper Empty Switch
  50
- Paper Empty Switch Adjustment
  50
- Mechanical Adjustment, Optical Sensor and Encoder /Timing Disc
  51
  - Electrical Adjustment
    52
- Horizontal Offset
  52
- Horizontal Offset Dip Switch
  53
- Horizontal Offset Print Sample
  53
- Removal/Replacement, Recommended Spares
  55
- Section 5-Removal/Replacement
  55
- Cover Assemblies
  56
  - Top Cover
    56
  - Rear Cover
    56
  - Body Cover
    58
- Cover Interlock Magnet
  58
- Paper Inlet Rack
  58
- Paper Outlet Rack Assembly
  58
- Head Flex Cable
  60
- Print Head Assembly
  60
- Ribbon Cassette and Guide
  60
- Head Adapter Pcb
  61
- Printer Mechanism
  62
  - Tilting Printer Mechanism
    62
  - Removing Printer Mechanism
    62
- Tilting Printer Mechanism
  63
- Removing Printer Mechanism
  64
- Dust Cover
  65
- Carriage Drive Belt
  66
- Carriage Drive Motor Belt
  66
- Optic Sensor Assembly
  67
- Carriage Drive Motor
  68
- Removal/Replacement, Carriage Drive Motor
  68
- Encoder/Timing Disc
  69
- Ribbon Drive Motor Mounting Bracket
  70
- Cover Interlock Switch
  72
- Ribbon Drive Motor
  72
- Paper Drive Belt
  73
- Removal/Replacement, Paper Drive Belt
  73
- Paper Drive Motor
  74
- Paper Empty Switch
  75
- Tractor Assemblies, Left I Right
  75
- On/Off Switch
  76
- Cover Latch Springs
  77
- Main Fuse
  77
- Power Cord
  77
- Pico Fuse
  78
- Formatter/Controller Pcb
  81
- Power Supply Assembly
  81
- Recommended Spare Parts Listing
  82
Section6-0Ptions/Accessories

83
- Accessories
  83
- General
  83
- Options
  83
Appendix Aelectrical Drawings

85
Appendixb-Interfaceinformation

104
- General Information
  104
- Parallel Interface Connection
  104
- Serial Interface Connection
  105
- Interface Connector Locations and Cables
  106
- Parallel and Serial Interface Connectors
  106
Appendixc-Controlsandindicators

107
- Control Panel Dip Switches
  107
- Control Panel Switches and Indicators
  107
- General
  107
- Mechanism Controls and Switches
  107
- Printer Mechanism Controls and Switches
  107
- Control Panel Switches and Indicators
  108
- Control Panel Dip Switches
  109
  - Printer Features Dip Switch S1
    110
  - Printer Features Dip Switch S2
    110
  - Printer Features Dip Switch S3
    110
  - Printer Features Dip Switch S4
    110
- Printer Features Dip Switch S3
  111
- Printer Features Dip Switch S4
  112
Appendix Dpico Fuse Color Code

113
- General Information
  113
Appendix Emodel 351-3 & 351-4 Printers

114
- Documentation
  114
- Model 351-3 Printer
  114
- Model 351-4 Printer
  114

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