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Disclaimer
Information in this publication is subject to change without notice and does not
represent a commitment on the part of Ithaca Peripherals Incorporated.
However, as product improvements become available, Ithaca Peripherals will
make every effort to provide updated information for the products described in
this publication.
Ithaca Peripherals cannot guarantee that changes in software and equipment
made by other manufacturers, and referred to in this publication, do not affect
the applicability of the information in this publication.
Copyright
Copyright © 1995
Ithaca Peripherals Incorporated
A Subsidiary of Tridex Corporation
Ithaca, New York U.S.A.
All Rights Reserved. No part of this publication may be reproduced, stored in a
retrieval system, or transmitted, in any form or by any means, mechanical,
photocopying, recording, or otherwise, without the prior written permission of
Ithaca Peripherals Incorporated.
First Edition, April 1995
Printed in U.S.A.
Trademarks
PcOS® is a registered trademark of Ithaca Peripherals Incorporated. Ithaca
Peripherals Incorporated is a subsidiary of Tridex Corporation.
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Table of Contents
Troubleshooting
Related Manuals for Ithaca 75
Summary of Contents for Ithaca 75
- Page 1 Disclaimer Information in this publication is subject to change without notice and does not represent a commitment on the part of Ithaca Peripherals Incorporated. However, as product improvements become available, Ithaca Peripherals will make every effort to provide updated information for the products described in this publication.
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Page 2: Federal Communications Commission
Federal Communications Commission Radio Frequency Interference Statement This equipment complies with the limits for a Class A computing device in accordance with the specifications in Part 15 of FCC rules which are designed to minimize radio frequency interference in the installation; however, there is no guarantee that radio or television interference will not occur in any particular installation. -
Page 3: Table Of Contents
Table of Contents TABLE OF CONTENTS PRODUCT INFORMATION Communication Interfaces ................2 Parallel Interface................2 Serial Interface...................2 Technical Specifications ................4 Performance and Reliability ...............4 Printing....................4 Physical Dimensions ................4 Environmental Operating Limits............5 Power Requirements................5 Consumable Products.................5 MAINTENANCE Necessary Tools ..................7 Lubricating the Printer................8 Lubricating the Journal Take-up Gears and Pressure Roll Bearing ..8 Lubricating the Auto Cutter Assembly..........9 Lubricating the Transport-Auto Cutter Assembly ......10... -
Page 4: Troubleshooting
Series 70 Maintenance Manual DISASSEMBLY Necessary Tools ..................19 Transport-Auto Cutter Assembly ..............20 Removing the Transport-Auto Cutter Assembly........20 Disassembling the Transport-Auto Cutter Assembly ......22 Auto Cutter Assembly (Without Transport) ..........26 Removing the Auto Cutter Assembly ..........26 Disassembling the Auto Cutter Assembly .........28 Base Assembly ..................30 AC Switch Assembly and Power Transformer...........32 Serial Interface Board................34... -
Page 5: Index
Table of Contents APPENDIX A: SPARE PARTS Standard Printer Parts ................75 Optional Auto Cutter Parts ...............77 APPENDIX B: THEORY OF OPERATION Electrical Operation..................79 Circuit Operation ................79 Initialization..................80 Communication Interface Control.............80 Printhead Drive Circuit ..............81 Carriage Drive .................82 Linefeed...................83 Alarm Circuits .................84 Power Supply ..................84... -
Page 9: Product Information
Paper Transport- Auto 6.0 Inch Models Printing Printing Auto Cutter Receipt Switch Cutter Roll Option Option √ √ √ √ √ √ √ √ √ √ Model 75 √ √ √ √ √ √ √ √ √ √ Model 76... -
Page 10: Communication Interfaces
Series 70 Maintenance Manual COMMUNICATION INTERFACES Parallel and serial communication interfaces are available. PARALLEL INTERFACE Figure 2: Connector for Parallel Interface The parallel interface is standard on all models and is compatible with Centronics. SERIAL INTERFACE Figure 3: Connector for Serial Interface The RS-232C serial interface is optional on all models. -
Page 11: Rs-232C Specifications
Product Information Figure 4: RS-232C Interface Board RS-232C Specifications: ♦ 2k Buffer ♦ 19.2k Baud Maximum ♦ Read/Busy or XON/XOFF ♦ Diagnostic Mode... -
Page 12: Technical Specifications
All Points Addressable (H x V) Bi-Directional Bit Image Graphics 60 x 72 Dots per Inch 8 Bit Double Density 120 x 144 Dots per Inch PHYSICAL DIMENSIONS Width Depth Height Weight 6.06 Inches 10.75 Inches 6.75 Inches 13 Pounds... -
Page 13: Environmental Operating Limits
One or Two Ply Width: 3.25 Inches Diameter) Diameter: 3.50 Inches Receipt Paper (6.0 Inch One Ply Width: 3.25 inches Diameter) Diameter: 6.0 inches Ithaca Peripherals Number Rolls Per Length Color Part Number of Plies Carton 100-1667 (3.5 Inch 240 Feet... - Page 14 Series 70 Maintenance Manual...
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Page 15: Maintenance
Maintenance MAINTENANCE NECESSARY TOOLS Caution: Using the wrong tools may cause personal injury or damage the printer. Be sure to use the proper tools when maintaining or servicing the Series 70 Printer. The following table provides the necessary tools needed to properly maintain the Series 70 Printer. -
Page 16: Lubricating The Printer
Series 70 Maintenance Manual LUBRICATING THE PRINTER No periodic lubrication is required under normal printer use. Some lubrication may be required with heavy printer use. Caution: DO NOT use petroleum-based lubricants as they will damage the plastic parts. Use a silicone-based lubrication. Caution: Lubricating any points other than described here, such as the Space Rack, will cause early and expensive failures to the printer. -
Page 17: Lubricating The Auto Cutter Assembly
Maintenance LUBRICATING THE AUTO CUTTER ASSEMBLY Figure 6: Lubricating the Auto Cutter Assembly A = Guide Wheel B = Pins for Shear Plate Lubricate the following points only: ♦ Guide Wheel When: every six months or 100,000 cycles ♦ Pins for Shear Plate When: every six months or 100,000 cycles... -
Page 18: Lubricating The Transport-Auto Cutter Assembly
Series 70 Maintenance Manual LUBRICATING THE TRANSPORT-AUTO CUTTER ASSEMBLY Figure 7: Lubricating the Transport-Auto Cutter Assembly A = Guide Wheel B = Pins for Shear Plate... -
Page 19: Cleaning The Printer
Maintenance For ease in lubricating the Transport-Auto Cutter Assembly, remove it from the printer. See “Transport-Auto Cutter Assembly” in the “Disassembly” chapter. Lubricate the following points only: ♦ Guide Wheel When: every six months or 100,000 cycles ♦ Pins for Shear Plate When: every six months or 100,000 cycles CLEANING THE PRINTER Remove paper dust periodically by using a vacuum cleaner or air compressor. -
Page 20: Diagnosing The Print Quality
Series 70 Maintenance Manual DIAGNOSING THE PRINT QUALITY Use the flowchart on the following page to determine which procedure to use to correct the specified print problems. Figure 8: Flowchart for Print Quality Diagnosis Note: If a print problem is not covered in this flowchart, refer to the troubleshooting chart on page 53. -
Page 21: Adjusting The Platen Parallel To The Printhead
Maintenance ADJUSTING THE PLATEN PARALLEL TO THE PRINTHEAD Figure 9: Platen and Printhead A = Ribbon Cassette D = Printhead B = Range Adjustment Lever E = Adjusting Screw C = Platen F = Adjusting Gear... - Page 22 Series 70 Maintenance Manual 1. Turn off the printer. 2. Remove all paper from the printer. 3. Remove the Ribbon Cassette (A). 4. Set the Range Adjustment Lever (B) to position 1 (towards the rear of the printer). The Range Adjustment Lever (B) is the blue lever on the Printhead (D). 5.
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Page 23: Adjusting The Platen Air Gap
Maintenance ADJUSTING THE PLATEN AIR GAP Figure 10: Platen Air Gap A = Ribbon Cassette E = Right Adjusting Screw B = Carriage F = Printhead C = Range Adjustment Lever G = Platen D = Left Adjusting Screw... - Page 24 Series 70 Maintenance Manual 1. Turn off the printer. 2. Remove all paper from the printer. 3. Remove the Ribbon Cassette (A). 4. Set the Range Adjustment Lever (C) to position 1 (towards the rear of the printer). The Range Adjustment Lever is the blue lever on the Printhead (F). 5.
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Page 25: Replacing The Feed Roll Shaft
Maintenance REPLACING THE FEED ROLL SHAFT Figure 11: Feed Roll Shaft A = Printhead D = C-Clip B = Print Head Clamp E = Feed Roll Bearings C = Feed Roll Shaft... -
Page 26: Forms Compensation
Series 70 Maintenance Manual Note: Any time the Feed Roll Shaft is replaced, the Feed Roll Bearings on either end must also be replaced. 1. Turn off the printer. 2. Remove the Ribbon Cassette. 3. Remove the Printhead (A) by lifting up on the Printhead Clamp (B) that is located on the right side of the Printhead. -
Page 27: Disassembly
Disassembly DISASSEMBLY This chapter describes the disassembly procedures for the following items: ♦ Transport-Auto Cutter Assembly ♦ Base Assembly ♦ AC Switch Assembly and Power Transformer ♦ Serial Interface Board ♦ Control Board ♦ Interconnect Board ♦ Journal Bucket Assembly ♦... -
Page 28: Transport-Auto Cutter Assembly
Series 70 Maintenance Manual TRANSPORT-AUTO CUTTER ASSEMBLY REMOVING THE TRANSPORT-AUTO CUTTER ASSEMBLY Figure 12: Transport-Auto Cutter Assembly A = Transport-Auto Cutter Assembly C = Forms Compensation Arm Assembly B = Screws D = Ground Wire... - Page 29 Disassembly Note: This section describes removing the Transport-Auto Cutter Assembly from the printer. See page 26 for removing the Auto Cutter Assembly (without Transport). 1. Remove the Transport-Auto Cutter Assembly (A) from the Forms Compensation Arm Assembly (C) by unscrewing the two screws (B) with a #1 Phillips screwdriver.
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Page 30: Disassembling The Transport-Auto Cutter Assembly
Series 70 Maintenance Manual DISASSEMBLING THE TRANSPORT-AUTO CUTTER ASSEMBLY Note: The folowing two sections describe disassembling the Transport-Auto Cutter Assembly, beginning with the Right-Side Frame followed by the Left-Side Frame (the side with the gears). Right-Side Frame Figure 13: Transport-Auto Cutter Assembly (1 of 2) A = Transport Sensor G = Hex-Head Screw &... -
Page 31: Auto Cutter Assembly
Disassembly Note: You may find it easier to remove the Transport Sensor and the Drive Wheel Assembly (see the parts in the list below) before separating the Right-Side Frame. To remove the Transport Sensor (A) before separating the Right-Side Frame (D), remove the Worm Wheel Gear (H, figure 14) to free the Transport Sensor Cable. - Page 32 Series 70 Maintenance Manual Left-Side Frame Figure 14: Transport-Auto Cutter Assembly (2 of 2) A = Auto Cutter K = Brass Pin B = E-Clip L = Cutter Motor Assembly C = Hex-Head Screw & Lock Washer M = Cutter Motor Screws D = Back Plate N = Micro Switch E = Shear Plate...
- Page 33 Disassembly 1. Remove the small E-Clip (B) and the Worm Wheel Gear (H). 2. Cut the two tie wraps holding the Transport Sensor Cable to the Transport- Auto Cutter Assembly and the other cables. You can now separate the Transport Sensor (A, figure 13) and cable from the Transport-Auto Cutter Assembly.
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Page 34: Auto Cutter Assembly (Without Transport)
Series 70 Maintenance Manual 10. Remove the Lower Paper Chute (B, figure 13) from the Left-Side Frame (G) by unscrewing the two screws (J, figure 13) with a #0 Phillips screwdriver. Note: Reverse these procedures to reassemble the Left-Side Frame. AUTO CUTTER ASSEMBLY (WITHOUT TRANSPORT) REMOVING THE AUTO CUTTER ASSEMBLY Figure 15: Auto Cutter Assembly (without Transport) - Page 35 Disassembly A = Auto Cutter Assembly C = Forms Compensation Arm Assembly B = Screws D = Ground Wire Note: This section describes removing the Auto Cutter Assembly from the printer. See page 20 for removing the Transport-Auto Cutter Assembly). 1.
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Page 36: Disassembling The Auto Cutter Assembly
Series 70 Maintenance Manual DISASSEMBLING THE AUTO CUTTER ASSEMBLY Figure 16: Auto Cutter Assembly A = Auto Cutter Gear Shield M = Left-Side Frame B = Screw N = Worm Wheel Gear C = Rotary Shield O = C-Clip D = Auto Cutter P = Rotary Cam Gear E = C-Clip Q = Brass Pin... - Page 37 Disassembly 1. Remove the Auto Cutter Gear Shield (A) by removing the Screw (B) holding the Auto Cutter Gear Shield to the Left-Side Frame (M) with a #1 Phillips screwdriver. 2. Remove the Rotary Shield (C) by lifting it out and down from the top. 3.
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Page 38: Base Assembly
Series 70 Maintenance Manual BASE ASSEMBLY Figure 17: Base Assembly... - Page 39 Disassembly A = Base Assembly C = AC Power Transformer Cable B = Sems Screws Note: Remove the Base Assembly from the rest of the printer before disassembling the printer. After removing the Base Assembly, you can then remove the AC Switch Assembly and the AC Power Transformer from the Base Assembly.
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Page 40: Ac Switch Assembly And Power Transformer
Series 70 Maintenance Manual AC SWITCH ASSEMBLY AND POWER TRANSFORMER Figure 18: AC Switch Assembly and Power Transformer (1 of 2) Note: This assembly may vary slightly depending on the model. A = AC Power Transformer E = AC Switch Cover Plate B = AC Plug F = AC Switch Cover Plate Screws C = Nut and Washer... - Page 41 Disassembly Note: Before removing the AC Switch Assembly and Power Transformer, you must separate the Base Assembly from the printer. Refer to “Base Assembly” earlier in this chapter. 1. Remove the nut and washer (C) holding the AC Power Transformer (A) to the Base Assembly with a 3/8 inch nut driver.
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Page 42: Serial Interface Board
Series 70 Maintenance Manual SERIAL INTERFACE BOARD Figure 20: Serial Interface Board A = Serial Interface Board C = Glue B = Screws D = Standoffs... - Page 43 Disassembly Note: Before removing the Serial Interface Board, you must separate the printer from the Base Assembly. Refer to “Base Assembly” earlier in this chapter. For ease in removing any of the boards, remove the Transport-Auto Cutter Assembly from the printer. Refer to “Transport- Auto Cutter Assembly”...
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Page 44: Control Board
Series 70 Maintenance Manual CONTROL BOARD Figure 21: Control Board A = Control Board B = Screws... - Page 45 Disassembly Note: Before removing the Control Board, you must separate the printer from the Base Assembly and remove the Serial Interface Board, if present. Refer to “Base Assembly” and “Serial Interface Board” earlier in this chapter. For ease in removing any of the boards, remove the Transport- Auto Cutter Assembly from the printer.
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Page 46: Interconnect Board
Series 70 Maintenance Manual INTERCONNECT BOARD Figure 22: Interconnect Board... - Page 47 Disassembly A = Interconnect Board F = Cable Clamp B = Paper Low Switch Cable G = Contact Rubber C = Journal Take-up Motor Cable H = Carriage Ribbon Cable D = Test Switch Cable J = Pressure Bar E = Brass Standoffs Note: Before removing the Interconnect Board, you must separate the printer from the Base Assembly, remove the Serial Interface Board (if used), and the Control Board.
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Page 48: Journal Bucket Assembly
Series 70 Maintenance Manual JOURNAL BUCKET ASSEMBLY REMOVING THE JOURNAL BUCKET ASSEMBLY Figure 23: Journal Bucket Assembly (1 of 2) - Page 49 Disassembly A = Journal Bucket Assembly C = Washers B = Nuts D = Helper Springs Note: You do not need to separate the Printer from the Base Assembly, or remove any of the boards to remove the Journal Bucket Assembly. If you have already removed the Base Assembly and the boards, turn the printer right-side up, but be careful not to damage the Carriage Cable.
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Page 50: Disassembling The Journal Bucket Assembly
Series 70 Maintenance Manual DISASSEMBLING THE JOURNAL BUCKET ASSEMBLY Figure 24: Journal Bucket Assembly (2 of 2) Note: This assembly may vary slightly depending on the model. A = Journal Bucket Assembly F = Switch Gears B = Left Paper Supply Plate G = E-Clips C = Right Paper Supply Plate H = Journal Take-up Motor... - Page 51 Disassembly Note: The following instructions describe disassembling the Journal Bucket Assembly with the Journal Take-up Motor and gears. Some models do not have the journal take-up option. On those models, you only need to remove the Paper Low Switch and the Paper Supply Plates (plastic pieces on the sides of the bucket) to disassemble the Journal Bucket Assembly.
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Page 52: Carriage Assembly
Series 70 Maintenance Manual CARRIAGE ASSEMBLY SPACE MOTOR ASSEMBLY Figure 25: Space Motor Assembly... - Page 53 Disassembly A = Printhead E = Space Motor B = Ribbon Cassette F = Screw C = Ribbon Feed Gear Assembly G = Screws D = Carriage Cable H = Slider Assembly Note: You do not need to separate the Printer from the Base Assembly or remove any of the boards to remove the Carriage Assembly.
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Page 54: Carriage Shaft Bearing And Space Rack
Series 70 Maintenance Manual CARRIAGE SHAFT BEARING AND SPACE RACK Figure 26: Carriage Shaft Bearing and Space Rack A = Carriage Shaft D = Carriage Shaft Stop Blocks B = Screws E = Carriage Assembly C = Base Plate F = Space Rack... - Page 55 Disassembly Note: Before removing the Carriage Shaft Bearing and Space Rack, you must remove the Space Motor Assembly. Refer to the previous section, “Space Motor Assembly.” 1. Remove the screws (B) at each end of the Carriage Shaft (A) with a #1 Phillips screwdriver.
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Page 56: Feed Roll Shaft
Series 70 Maintenance Manual FEED ROLL SHAFT Figure 27: Feed Roll Shaft A = Printhead D = C-Clip B = Printhead Clamp E = Feed Roll Bearings C = Feed Roll Shaft... - Page 57 Disassembly Note: You do not need to remove any items from the printer to remove the Feed Roll Shaft, except for the Ribbon Cassette and the Printhead. Any time the Feed Roll Shaft is replaced, the Feed Roll Bearings on either end must also be replaced.
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Page 58: Linefeed Motor Assembly
Series 70 Maintenance Manual LINEFEED MOTOR ASSEMBLY Figure 28: Linefeed Motor Assembly A = Base Plate C = Nut B = Linefeed Motor Assembly D = Clip... - Page 59 Disassembly Note: Before removing the Linefeed Motor, you must separate the printer from the Base Assembly, remove the boards, and remove the Journal Bucket Assembly. See “Base Assembly,” the sections for the boards, and “Journal Bucket Assembly” earlier in this chapter. 1.
- Page 60 Series 70 Maintenance Manual...
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Page 61: Troubleshooting
Troubleshooting TROUBLESHOOTING This chapter provides solutions to problems that may occur with the printer. Use the table to determine the problem, then refer to the specified flowchart that describes the corrective action for that problem. The flowcharts are on the following pages and are identified by the number referred to in the table. -
Page 62: Fixing The Problem
Series 70 Maintenance Manual FIXING THE PROBLEM The troubleshooting flowcharts are identified by a circled number that corresponds with the problems listed in the table on the previous page. They are presented in the order listed in the table. Flowchart Flowchart Flowchart Reference... - Page 63 Troubleshooting Figure 29: Flowchart 1...
- Page 64 Series 70 Maintenance Manual Figure 30: Flowchart 2...
- Page 65 Troubleshooting Figure 31: Flowchart 2-1...
- Page 66 Series 70 Maintenance Manual Figure 32: Flowchart 2-2...
- Page 67 Troubleshooting Figure 33: Flowchart 3...
- Page 68 Series 70 Maintenance Manual Figure 34: Flowchart 4...
- Page 69 Troubleshooting Figure 35: Flowchart 5...
- Page 70 Series 70 Maintenance Manual Figure 36: Flowchart 6...
- Page 71 Troubleshooting Figure 37: Flowchart 7...
- Page 72 Series 70 Maintenance Manual Figure 38: Flowchart 8...
- Page 73 Troubleshooting Figure 39: Flowchart 9...
- Page 74 Series 70 Maintenance Manual Figure 40: Flowchart 10...
- Page 75 Troubleshooting Figure 41: Flowchart 11...
- Page 76 Series 70 Maintenance Manual Figure 42: Flowchart 12...
- Page 77 Troubleshooting Figure 43: Flowchart 13...
- Page 78 Series 70 Maintenance Manual Figure 44: Flowchart 14...
- Page 79 Troubleshooting Figure 45: Connections Note: This illustration is referenced by the letters in the troubleshooting flowcharts and in the illustrations on the following three pages.
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Page 80: Checking Connections And Resistance
Series 70 Maintenance Manual CHECKING CONNECTIONS AND RESISTANCE PRINTHEAD The following illustration shows the connection circuit for the Printhead and the rear of the Printhead. The resistance should be approximately 20 ohms. Pins at Connection Signals Pins on Rear of Printhead Printhead Common 5, 6, 7... -
Page 81: Space Motor Assembly
Troubleshooting SPACE MOTOR ASSEMBLY The following illustration shows the connection circuit for the Space Motor Assembly and the pins on the Space Motor. The resistance should be approximately 21 ohms between pads 17 and 16, 16 and 18, and 17 and 18 on the Space Motor. -
Page 82: Linefeed Motor
Series 70 Maintenance Manual LINEFEED MOTOR The following illustration shows the connection circuit for the Linefeed Motor. The resistance of each coil should be approximately 70 ohms between pads 38 and 39, 39 and 40, 37 and 36, and 36 and 35 on the Linefeed Motor. Pins at Connection Signals Pins on Linefeed Motor... -
Page 83: Appendix A: Spare Parts
Appendix A: Spare Parts APPENDIX A: SPARE PARTS STANDARD PRINTER PARTS Description Part Number AC Switch Assembly A/C Switch Assembly (110 VAC) 98-2132 A/C Switch Assembly (220 VAC) 98-1828 Board Assembly Board Assembly, IPI Auto-Cut 09-2155 Board Assembly, Main Control, Parallel 98-2165 Board Assembly, Main Control, Serial 98-2164... -
Page 84: Paper Supply
Series 70 Maintenance Manual Description Part Number Feed Roll Assembly Feed Roll Assembly 06-2189 Feed Roll Bearing (Two Required) 06-0682 Feed Roll Keeper (C-Clip) 520-9800104 Forms Compensation Forms Compensation Assembly 09-1484 Forms Compensation Helper Springs 98-1579 Fuse Fuse 1.0 Amp, 125V 150-9810010 Fuse 1.5 Amp, 125V 150-9810015... -
Page 85: Optional Auto Cutter Parts
Appendix A: Spare Parts Description Part Number Printhead Printhead, 9-Wire 06-0565 Printhead Clamp 06-0571 Ribbon Feed Mechanism Ribbon Feed Gearbox Assembly 98-2503 Space Motor Assembly and Space Rack Space Motor 06-0578 Space Rack 06-1773 Power Transformer Power Transformer, 110V 98-0857 Power Transformer, 220/240V 98-0858 OPTIONAL AUTO CUTTER PARTS... - Page 86 Series 70 Maintenance Manual...
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Page 87: Appendix B: Theory Of Operation
Appendix B: Theory of Operation APPENDIX B: THEORY OF OPERATION ELECTRICAL OPERATION CIRCUIT OPERATION Figure 49: Electrical Circuits of Printer Components... -
Page 88: Initialization
Series 70 Maintenance Manual The electrical section of the printer consists of the components shown in the illustration on the previous page. The Control Board contains the Microprocessor and its peripheral circuits, the DC power circuit, and Printhead and Line Feed Motor drive circuits. The Interconnect Board contains the Take-Up Motor and Cash Drawer Driver circuits. -
Page 89: Printhead Drive Circuit
Appendix B: Theory of Operation The data from the interface is input through the connector (CN1), and the interface LSI (Q4: M6990) latches this input data in sync with the /STB signal. The BUSY signal is on during processing of this data. When the processing is completed, the BUSY signal is turned off, and an /ACK signal is sent to request more data. -
Page 90: Carriage Drive
Series 70 Maintenance Manual CARRIAGE DRIVE Space Motor Control Figure 52: Communication Sequence for Space Motor Control The motor control LSI (Q4) outputs the space motor phase signals (SP-U, SP-V, SP-W) in accordance with the spacing command from the microprocessor, and at the same time outputs the overdrive signal (SPD-A). The SPD-A signal is a fixed-period pulse signal whose pulse width is controllable by the program, and is used to control the motor drive time. -
Page 91: Linefeed
Appendix B: Theory of Operation Slit Encoder Figure 53: Communication Sequence for Slit Encoder Space motor PHASE-A and PHASE-B signals are generated by a photo-sensor and a slit disk. The motor control LSI (Q4) frequency divides these edge pulse signals at a rate dependent upon the print pitch, and outputs the /IPT signal to provide dot-on and carriage position timing. -
Page 92: Alarm Circuits
Series 70 Maintenance Manual ALARM CIRCUITS Drive Circuit Fault Alarm Circuit This is a protective circuit that makes the AC fuse blow when a fault occurs in the Printhead Drive Circuit, Space Motor Drive Circuit, Line Feed Motor Drive Circuit, or their peripheral circuits. The circuit operates by monitoring the drive time using the HDALM, SPALM, and LFALM signals interlocked with the overdrive signal of each drive circuit. -
Page 93: Mechanical Operation
Appendix B: Theory of Operation AC Switch Plate The AC Switch Plate mounts the Power Switch, AC Fuse, and AC Noise Filter. Power Transformer If the Power Transformer temperature rises abnormally, the transformer’s built- in temperature fuse blows to prevent adverse effects on other components. MECHANICAL OPERATION PRINTHEAD MECHANISM AND OPERATION The Printhead is spring-loaded, using a permanent magnet, and can be easily... -
Page 94: Space Mechanism And Operation
Series 70 Maintenance Manual After the character is printed, the magnetic flux of the permanent magnet assembly attracts the armatures again which retract the print wires back into the wire guide. The Printhead has a built-in thermistor to prevent the coils from overheating. SPACE MECHANISM AND OPERATION The spacing operation is performed by the DC Motor driving the Carriage Frame, which is guided by the Carriage Shaft mounted parallel to the Platen. -
Page 95: Paper Feed Mechanism And Operation
Appendix B: Theory of Operation Ribbon Feed Operation As the Space Motor rotates, the Ribbon Gear on the Space Motor Shaft rotates to drive the Drive Gear in the Ribbon Cartridge via the Ribbon Feed Gear Assembly. As a result, the Ribbon is fed. In bi-directional printing, the Ribbon Gear rotational direction reverses every time the Carriage reverses direction. - Page 96 Series 70 Maintenance Manual...
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Page 97: Appendix C: Schematics
Appendix C: Schematics APPENDIX C: SCHEMATICS The following schematics are provided in this appendix: ♦ Control Board (Revision 10, Part Designator: SLMR) ♦ Serial Board (Revision 12, Part Designator: SLHI) ♦ Interconnect Board (Revision A, Part Designator: 09-1912) All schematics are for the latest revisions of these boards. -
Page 98: Control Board
Series 50 Maintenance Manual CONTROL BOARD... - Page 99 Appendix C: Schematics...
- Page 100 Series 50 Maintenance Manual...
- Page 101 Appendix C: Schematics...
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Page 102: Serial Interface Board
Series 50 Maintenance Manual SERIAL INTERFACE BOARD... - Page 103 Appendix C: Schematics...
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Page 104: Interconnect Board
Series 50 Maintenance Manual INTERCONNECT BOARD... -
Page 105: Index
Index INDEX AC switch assembly carriage assembly drive circuit fault, alarm, 84 removing, 32 removing, 44 spare parts, 75 spare parts, 75 AC switch plate carriage drive electrical operation, 79 power supply, 85 slit encoder, 83 environmental operating limits, adjustments, 11... - Page 106 9, 11 ribbon cassette power cord pressure roller bearing, 8 ordering, 5 spare parts, 76 take-up assembly gears, 8 spare parts, 75 power requirements, 5 transport-auto cutter ribbon feed mechanism, 86 power supply, 84 assembly, 10 spare parts, 77...
- Page 107 Index spare parts, 75, 77 lubrication, 8 AC switch assembly, 75 tools, for maintenance, 7, 19 schematics auto cutter assembly, 77 transport-auto cutter assembly control board, 90 board assembly, 75 disassembling, 22 interconnect board, 96 carriage assembly, 75 lubrication, 10...
- Page 108 Series 50 Maintenance Manual...
- Page 109 Index 101 P/N:100-7090 Rev. A 04/95...