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Centronics 351 Manuals
Manuals and User Guides for Centronics 351. We have
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Centronics 351 manual available for free PDF download: 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
No Print Head Movement on Power-Up Troubleshooting Flow Chart
34
Control Panel Switches and Indicators Troubleshooting Flow Chart (Sheet 1 of 3)
35
Control Panel Switches and Indicators Troubleshooting Flow Chart (Sheet 2 of 3)
36
Control Panel Switches and Indicators Troubleshooting Flow Chart (Sheet 3 of 3)
37
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
Broken Characters (Missing Dots) Troubleshooting Flow Chart
40
Missing or Wrong Characters Troubleshooting Flow Chart
41
Preventive Maintenance
45
Printer Markings
45
Printed Circuit Board Markings
45
Printer Nameplate
45
Printed Circuit Board Marking
46
Adjustment Summary
47
Carriage Drive Belt
47
Carriage Drive Belt Adjustment
47
Section 4-Adjustments
47
Carriage Drive Motor Belt
48
Carriage Drive Motor Belt Adjustment
48
Paper Drive Belt
49
Tractor Gear Backlash
49
Tractor Gear Backlash Adjustment
49
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
Assembly Drawing, Formatter /Controller (64001101-8001
85
Formatter /Controller PCB Assembly
85
General Information
85
Wiring Diagram, Model 351
85
Schematic Diagram, Formatter /Controller (64001101-9001) (Sheet 1
87
Schematic Diagram, Formatter /Controller (64001101-9001) (Sheet 2
88
Schematic Diagram, Formatter /Controller (64001101-9001) (Sheet 3
89
Schematic Diagram, Formatter/Controller (64001101-9001) (Sheet 4
90
Schematic Diagram, Formatter/Controller (64001101-9001) (Sheet 5
91
Schematic Diagram, Formatter /Controller (64001101-9001) (Sheet 6
92
Schematic Diagram, Formatter /Controller (64001101-9001) (Sheet 7
93
Schematic Diagram, Formatter/Controller (64001101-9001) (Sheet 8
94
Schematic Diagram, Formatter /Controller (64001101-9001) (Sheet 9
95
Schematic Diagram, Formatter/Controller (64001101-9001) (Sheet 10
96
Schematic Diagram, Formatter/Controller (64001101-9001) (Sheet 11
97
Assembly Drawing, Control Panel and Memory Section
101
Assembly Drawing, Serial and Parallel Input Section, Formatter /Controller PCB Assembly
102
Assembly Drawing, Print Head Driver and D.C. Power Entry Section
103
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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