NCR 7193 Service Manual
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NCR 7193 Service Manual

Thermal receipt printer
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NCR 7193 Thermal Receipt
Printer
Service Guide
BD20-1440-A
Issue B
August 1998

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Summary of Contents for NCR 7193

  • Page 1 NCR 7193 Thermal Receipt Printer Service Guide BD20-1440-A Issue B August 1998...
  • Page 2 NCR, therefore, reserves the right to change specifications without prior notice. All features, functions, and operations described herein may not be marketed by NCR in all parts of the world. In some instances, photographs are of equipment prototypes. Therefore, before using this document, consult with your NCR representative or NCR office for information that is applicable and current.

  • Page 3: Table Of Contents

    7193 Service Guide Contents Contents Chapter 1: About the 7193 Printer Models ............................1 Communication Interfaces....................1 Features ............................2 Options ............................2 Thermal Printhead ........................2 Cleaning the Printer........................3 Cleaning the Cabinet ......................3 Cleaning the Thermal Printhead..................3 Chapter 2: Installing the Printer What Is in the Box? ........................
  • Page 4 Contents 7193 Service Guide Chapter 4: Troubleshooting Operator Panel Lights......................33 Field Effect Transistors (FETs)) ..................... 34 Operating Problems ........................ 35 Electronic Problems ........................ 37 Printing Problems ........................37 Chapter 5: Disassembling and Reassembling the Printer Getting Started........................
  • Page 5 7193 Service Guide Contents Appendix B: Ordering Paper and Supplies Ordering Thermal Paper ......................59 Ordering Other Supplies......................60 Order from Other Equipment Manufacturers.............. 60 Order from Axiohm......................60 Appendix C: Kits Appendix D: Connectors Power Connector........................63 RS-232C Connector ......................... 63 RS-232C 25-Pin to 9-Pin Cable Diagram ...............
  • Page 6 Contents 7193 Service Guide August 1998...

  • Page 7: Chapter 1: About The 7193 Printer

    Chapter 1: About the 7193 Printer Chapter 1: About the 7193 Printer The 7193 thermal receipt printer is fast, quiet, and very reliable. With thermal printing technology, there is no ribbon cassette to change, and paper loading is extremely simple.

  • Page 8: Features

    Wall-mount kit for hanging the printer on a wall Thermal Printhead The 7193 uses a thermal printhead which is extremely fast and quiet. Because it uses heat to print directly on paper, there is no cassette or ribbon to change, eliminating soiled fingers and paper dust.

  • Page 9: Cleaning The Printer

    7193 Service Guide Chapter 1: About the 7193 Printer book for instructions on replacing the printhead. See “Cleaning the Printer” later in this chapter for cleaning instructions for the printhead. Cleaning the Printer Cleaning the Cabinet Clean the cabinet as needed to remove dust and finger marks. Use any household cleaner made for plastics, but test it first on a small unseen area.
  • Page 10 Chapter 1: About the 7193 Printer 7193 Service Guide August 1998...

  • Page 11: Chapter 2: Installing The Printer

    Installation report card (please complete this form and return to NCR) • 7193 Thermal Receipt Printer: Setup and User’s Guide These items may be ordered as options from NCR and will be shipped separately: • Wall-mount kit for the printer •...

  • Page 12: Choosing A Location

    7193 Service Guide Choosing a Location The 7193 is compact and requires little counter space. It may even be mounted on a wall if space is at a premium. See “Mounting the Printer on a Wall” later in this chapter. The power supply, if used, may also be mounted on a wall or under a table.
  • Page 13 For additional information on the setup mode (Level 1 Diagnostics), see the “Diagnostics” chapter. Note: Some 7193 models may appear slightly different than what is shown in the illustration. The procedures are the same for all models unless otherwise noted.

  • Page 14: Rs-232C Switch Settings

    Chapter 2: Installing the Printer 7193 Service Guide RS-232C Switch Settings Use the DIP switches to set the RS-232C parameters and the Data Error and Data Buffer options as shown. The parameters must match the host computer. See “Level 1 Diagnostics”...

  • Page 15: Parallel Switch Settings

    7193 Service Guide Chapter 2: Installing the Printer Parallel Switch Settings When switch 1 is set to Off, the printer is on-line and ready to communicate with the host computer. For systems using non-standard ACK handshaking, this option is on Switch 2.

  • Page 16: Lcsio (Rs-485) Switch Settings

    Chapter 2: Installing the Printer 7193 Service Guide LCSIO (RS-485) Switch Settings For printers using the LCSIO (RS-485) interface, the DIP switches are used to set the LCSIO (RS-485) address bits as shown in the following table. DIP Switch 1 (Set to Off when setting address bits)

  • Page 17: Connecting Cash Drawer Cables

    If only one cash drawer is used, plug the cable into the connector labeled 1. Note: Some 7193 models may appear slightly different than what is shown in the illustration. The procedures are the same for all models unless otherwise noted.

  • Page 18: Connecting Communication And Power Cables

    Chapter 2: Installing the Printer 7193 Service Guide Connecting Communication and Power Cables Models receiving power from the host computer (integrated), use one cable for communication and power. Models receiving power from a power supply (remote), use one cable for communication and a separate cable for power.

  • Page 19: Parallel Models

    7193 Service Guide Chapter 2: Installing the Printer Parallel Models August 1998...

  • Page 20: Turning On The Printer

    Chapter 2: Installing the Printer 7193 Service Guide Turning On the Printer Note: On models receiving power from a power supply, the printer receives power when the power supply is on even if the printer is off-line. To remove power from the printer, press the On Line button to take the printer off-line (On Line is off), then unplug the power supply power cord from the outlet.

  • Page 21: Testing The Printer

    7193 Service Guide Chapter 2: Installing the Printer Testing the Printer Run this test to check the printer. The test prints the settings for several functions, prints all variations of the character sets, and partially cuts the paper between each variation. See the “Diagnostics”...
  • Page 22 Chapter 2: Installing the Printer 7193 Service Guide August 1998...

  • Page 23: Mounting The Printer On A Wall

    7193 Service Guide Chapter 2: Installing the Printer Mounting the Printer on a Wall Use the wall-mount kit to mount the printer vertically on a wall. See “Appendix B: Ordering Paper and Supplies” for information on ordering the printer wall-mount kit.
  • Page 24 Chapter 2: Installing the Printer 7193 Service Guide August 1998...

  • Page 25: Mounting The Power Supply On A Wall

    7193 Service Guide Chapter 2: Installing the Printer Mounting the Power Supply on a Wall The power supply comes with a wall-mount kit to mount the power supply on the wall or under a table. See “Appendix B: Ordering Paper and Supplies” for information on ordering the power supply and wall-mount kit.
  • Page 26 Chapter 2: Installing the Printer 7193 Service Guide August 1998...

  • Page 27: Chapter 3: Diagnostics

    7193 Service Guide Chapter 3: Diagnostics Chapter 3: Diagnostics The following diagnostic tests are available for the 7193: • Level 0 Diagnostics Performed during the startup cycle • Level 1 Diagnostics (setup mode) Available in a dedicated environment and accessed through the DIP Switches •...

  • Page 28: Level 1 Diagnostics

    Chapter 3: Diagnostics 7193 Service Guide Level 1 Diagnostics Level 1 Diagnostics (setup mode) allow you to change the settings for various printer functions (described on the following pages) and to run certain tests using the DIP switches. Keep the following information in mind when changing the settings: •...

  • Page 29: Setting Data Error And Data Buffer Options

    7193 Service Guide Chapter 3: Diagnostics Setting Data Error and Data Buffer options This function allows you to select the handling of data reception errors (RS-232C only) and to select the size of the data buffer (RS-232C and Parallel only).

  • Page 30: Setting Printhead Resistance

    Chapter 3: Diagnostics 7193 Service Guide Setting Printhead Resistance This function allows you to change the setting for the printhead resistance. The setting (A- H) must match the letter stamped on the heatsink in back of the printhead. This is visible only by removing the L cover (operator panel) of the printer.

  • Page 31: Setting Default Lines Per Inch

    7193 Service Guide Chapter 3: Diagnostics Setting Default Lines per Inch This function allows you to set the default for lines per inch to either 7.6 or 6. Caution: The DIP switches are pre-set at the factory and should generally not be changed.

  • Page 32: Setting Partial Cut Distance

    Chapter 3: Diagnostics 7193 Service Guide Setting Partial Cut Distance This function allows you to change the length of the partial knife cut. The higher the number, the longer the cut. Caution: The DIP switches are pre-set at the factory and should generally not be changed.

  • Page 33: Setting The 7150 Response Mode

    Chapter 3: Diagnostics Setting the 7150 Response Mode This function allows you to set the 7193 to respond as an NCR 7150™ printer for the Configuration Message at the link level and the Request Status command at the command level. This “7150 response mode” allows the 7193 to communicate with those LCSIO (RS- 485) host computers whose drivers recognize the NCR 7150™...

  • Page 34: Ignoring/Using The Carriage Return

    Ignore CR (Hex 0D) Use CR (Hex 0D) as Print Command (Default)* *Emulates the NCR 7150™ printer. Turn the power back on to enter the settings into the EEROM. On remote models, the On Line light (green) blinks. Turn the power off.
  • Page 35 7193 Service Guide Chapter 3: Diagnostics Turn the power back on to enter the settings into the EEROM and enable the Data Scope Mode. On remote models, the On Line light (green) blinks. Turn the power off. Set the DIP switches to the former settings.

  • Page 36: Testing Receipt Printing

    Chapter 3: Diagnostics 7193 Service Guide Testing Receipt Printing This function allows you to select various print tests. You can also test the printing by following the procedures in “Testing the Printer” in chapter 2 without having to change the DIP switches. A sample test printout is in chapter 2.

  • Page 37: Level 2 Diagnostics

    7193 Service Guide Chapter 3: Diagnostics Level 2 Diagnostics Level 2 diagnostics run during normal printer operation. When the following conditions occur, the printer automatically turns off the appropriate motors and disables printing to prevent damage: • Paper out, cover off, or knife unable to home •...
  • Page 38 Chapter 3: Diagnostics 7193 Service Guide August 1998...

  • Page 39: Chapter 4: Troubleshooting

    Chapter 4: Troubleshooting Chapter 4: Troubleshooting The 7193 printer is a simple, generally trouble-free printer, but from time to time minor problems may occur. For example, the power supply may be interrupted or the printhead may overheat for some reason.

  • Page 40: Field Effect Transistors (Fets))

    Chapter 4: Troubleshooting 7193 Service Guide Field Effect Transistors (FETs)) Field Effect Transistors (FETs) are located on the PC board and can be used to diagnose motor and printhead problems. There are a maximum of 14 FETs located on the PC Board assigned to the following items: •...

  • Page 41: Operating Problems

    7193 Service Guide Chapter 4: Troubleshooting Operating Problems The tables in this section aid in determining the cause of printer malfunctions and provide a list of steps to follow to correct each problem. The steps in the “What to do” column progress from correcting the most likely cause to correcting the least likely cause of the problem.
  • Page 42 Chapter 4: Troubleshooting 7193 Service Guide Problem Possible Causes What To Do Knife Does Not Operate Paper jam. Open the receipt cover, inspect the knife, and clear any jammed paper. Bad knife home sensor. Check knife sensor with an ohm meter at its harness and test point.

  • Page 43: Electronic Problems

    7193 Service Guide Chapter 4: Troubleshooting Electronic Problems Problem Possible Causes What To Do Power Voltage too Improper connections in printer. Check that all cable connections are correct and Low/High that the power supply (if present) is plugged in and the printer is on-line.
  • Page 44 Chapter 4: Troubleshooting 7193 Service Guide time, cleaning the printhead with cotton swabs and rubbing alcohol will not be of much benefit. See “Appendix B: Ordering Paper and Supplies” for the recommended paper grades. August 1998...

  • Page 45: Chapter 5: Disassembling And Reassembling The Printer

    This chapter explains how to completely disassemble and reassemble the 7193 printer. The 7193 is a relatively simple printer with a straightforward design and is easy to service. This information may be used as an aid for training service personnel as well as a reference guide for servicing the printer in the field.

  • Page 46: Removing The Receipt Cover

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Removing the Receipt Cover Turn off the host system or unplug the power supply (if used). Disconnect the communication and power cables. Models receiving power from the host system (integrated) use one cable for communication and power.

  • Page 47: Removing The L Cover

    7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Note: The platen cannot be replaced on knife units. The receipt cover comes complete as a kit and cannot be disassembled. Replacing the Platen Slide one end of the platen shaft into the slot on the receipt cover and press the other side until it snaps in place in the other slot.

  • Page 48: Removing The Print Mechanism And Pc Board Assembly

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Removing the Print Mechanism and PC Board Assembly Caution: Electrostatic Discharge may damage the PC board. Wear a grounded wrist strap and use a static mat or other ESD protected work surface whenever you work with the PC board.
  • Page 49 7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Turn the printer on its rear wall and loosen and remove the #8 thread-cutting screw on the bottom of the printer. Go slowly to preserve the screw hole. Turn the printer back over so it is right side up.

  • Page 50: Separating The Print Mechanism And Pc Board Assembly

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Separating the Print Mechanism and PC Board Assembly Remove the PC board assembly from the print mechanism by unscrewing the large #8 thread-cutting screw on the bottom of the board using a P2 Posidrive screwdriver.

  • Page 51: Disconnecting Cables

    7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Disconnecting Cables See the illustration on the facing page for the locations of the connectors on the PC board. Remove the following cables by gently tugging on the connector. •...

  • Page 52: Disassembling The Print Mechanism

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Disassembling the Print Mechanism The following subassemblies and parts may be removed from the print mechanism for service or replacement: • Printhead • Knife assembly and motor (on knife unit) •...

  • Page 53: Replacing The Knife Assembly

    7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Replacing the Knife Assembly Place the left knife support over the left side of the knife blade. Slide the rotating blade into the right-hand knife support. Replace the two screws in the left-hand knife support, securing it to the frame.

  • Page 54: Removing The Printhead

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Removing the Printhead Caution: Eectrostatic Discharge may damage the PC board. Wear a grounded wrist strap and use a static mat or other ESD protected work surface whenever you work with the PC board.

  • Page 55: Replacing The Printhead

    7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Replacing the Printhead The mechanism should be facing you with the printhead area toward you. Note: Take note of the letter (A-H for early models; A-D, 3-0 for later models) printed on the heat sink (the part of the printhead which faces the front of the printer).

  • Page 56: Replacing The Knife Motor

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Replacing the Knife Motor Replace the knife motor by placing its gear through the mounting hole in the right side of the printer mechanism. The gear should mesh with the gears on the outer edge.

  • Page 57: Replacing The Switches

    7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Replacing the Switches For each switch, reattach the faston terminals on the harness to the rearmost spade on the switch. Replace the paper out switch in its proper position under the paper path area and insert the screwdriver through the knife motor mounting hole and replace the mounting screw.

  • Page 58: Disassembling The Pc Board Assembly

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Disassembling the PC Board Assembly Disassembling the PC board assembly consists of separating the ESD/EMC shield from the PC board. This is not required as the PC board assembly is an orderable item. Neither the PC board nor the ESD/EMC shield are separately orderable.

  • Page 59: Replacing The Print Mechanism

    7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer Replacing the Print Mechanism Replacing the PC Board Assembly on the Print Mechanism See “Separating the Print Mechanism and PC Board Assembly” for more information. Place the PC board next to the right side of the print mechanism in a vertical position, so that J2 and J3 connectors are up.

  • Page 60: Replacing The Print Mechanism

    Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide Replacing the Print Mechanism See “Removing the Print Mechanism and PC Board Assembly” for more information. Lift the entire mechanism/board assembly and place it in the cabinet. The mounting shelf (in the rear of the mechanism) should fit under the row of ribs along the back inside of the cabinet.

  • Page 61: Appendix A: Specifications

    7193 Service Guide Appendix A: Specifications Appendix A: Specifications Features Interfaces RS-232C, Parallel, LCSIO Version of RS-485 Memory/Firmware 16K RAM (available for downloadable character sets and bit- mapped graphics) History EEROM 4K Buffer (RS-232C and Parallel) Resident character sets PC Code Page 437 (US)

  • Page 62: Power Requirements

    Appendix A: Specifications 7193 Service Guide Power Requirements The 7193 printer receives power either from the host system (integrated) or from a separate in-line power supply (remote) which can be purchased separately. Power from Host (Integrated) Voltage 21.4-30.8 Vac +5 Volts for Logic Circuits...

  • Page 63: Printing Specifications

    7193 Service Guide Appendix A: Specifications Printing Specifications Speed 1020 Lines per Minute Noise Level 50 dBA (ISO 7779) Printhead Direct Thermal, Fixed Head Print Area Host Selectable 44 (Standard) or 56 (Compressed) Columns Character Pitch 15.2 Characters per Inch (Standard) 19.0 Characters per Inch (Compressed)

  • Page 64: Density Of Receipt Print Lines

    7193 Service Guide Density of Receipt Print Lines When the 7193 prints high density print lines (text or graphics), it automatically slows down to a rate slower than 600 lines per minute. High density print lines are defined as lines with over 57% of the dots printing on the line (there are 448 total dot columns on the print station).

  • Page 65: Appendix B: Ordering Paper And Supplies

    The paper must not be attached at the core. Use paper with a colored stripe at the end to indicate that the paper is running low. To order thermal receipt paper, contact your sales representative or order from NCR at the following address or toll free number:...

  • Page 66: Ordering Other Supplies

    Appendix B: Ordering Paper and Supplies 7193 Service Guide August 1998...

  • Page 67: Appendix C: Kits

    7193 Service Guide Appendix C: Kits Appendix C: Kits The available service kits are listed in this section. See the Parts Identification Manual for more information. Knife Blade Kit 189-9940817 Paper Guide (Knife) Rotating Blade Drive Arm Knife Cover w/o platen...
  • Page 68 Appendix C: Kits 7193 Service Guide Knife Switch Kit 189-9940610 Micro Switch Screw Printhead Kit (Speed) 189-9940850 Printhead Screw Small Parts Kit 189-9940618 Left Knife Support Right Knife Support Knife Drive Arm Intermediate Gears Drive Gear (Knife) Grip Ring Ground Strap...

  • Page 69: Appendix D: Connectors

    7193 Service Guide Appendix D: Connectors Appendix D: Connectors Power Connector The following illustration shows the power cable connector and pin assignments. The power cable connector is a 6-pin mini DIN plug and is located in the small cavity under the printer at the front.

  • Page 70: Rs-232C 25-Pin To 9-Pin Cable Diagram

    Appendix D: Connectors 7193 Service Guide RS-232C 25-Pin to 9-Pin Cable Diagram Note: This information is provided for testing and troubleshooting only. RS-232C 9-Pin to 9-Pin Cable Diagram Note: This information is provided for testing and troubleshooting only. August 1998...

  • Page 71: Parallel Connector

    The following illustration shows the Parallel communication connector and pin assignments. The connector is at the rear of the printer. With Parallel, the 7193 is always remotely powered. See “Power Connector” earlier in this appendix for an illustration of the power connector and pin assignments.

  • Page 72: Powered From Power Supply

    Appendix D: Connectors 7193 Service Guide Powered from Power Supply The cable serves only as a communication cable. Cash Drawer Connectors The following illustration shows the pinouts for the cash drawer connector. Pin 1 Pin 6 The following two tables show the pinouts for cash drawers 1 and 2. The cash drawer connectors are located at the rear of the printer.

  • Page 73: Appendix E: Commands

    Note: All versions of the 7193 use the same commands as listed in this section unless otherwise noted. For example, the Parallel interface does require unique commands for controlling the cash drawer.

  • Page 74: Printer Function Commands

    Appendix E: Commands 7193 Service Guide Printer Function Commands These commands control the following basic printer functions and are listed in numerical order of their Hex codes: • Printing • Feeding the paper • Resetting the printer • Cutting the paper •...

  • Page 75: Print Characteristics Commands

    7193 Service Guide Appendix E: Commands Printer Function Commands Hex Code Command 1B 61 n Align Character Positions 1B 63 34 n Select Sensors to Stop Printing (Not Implemented) Enable or Disable Panel Switch 1B 63 35 n 1B 64 n...

  • Page 76: Graphics Commands

    Appendix E: Commands 7193 Service Guide Graphics Commands These commands print graphics data and are listed in numerical order of their Hex codes. Graphics Commands Hex Code Command 1B 24 etc. Set Absolute Starting Position 1 1B 2A m etc.

  • Page 77: Bar Code Commands

    7193 Service Guide Appendix E: Commands Real Time Commands Hex Code Command 1D 03 n Real Time Request to Printer, GS Sequence 1D 04 n Real Time Status Transmission, GS Sequence 1D 05 Real Time Printer Status Transmission Bar Code Commands These commands print bar codes.
  • Page 78 Appendix E: Commands 7193 Service Guide August 1998...

  • Page 79: Index

    7193 Service Guide Index Index Cash drawer —7— connector and pin assignments, 66 7150 response mode, 27 ordering, 60 7193 printer Cleaning printer, 3 cleaning, 3 Clearance around printer, 6 clearance, 6 Commands description, 1 bar code, 71 dimensions, 6, 56...
  • Page 80 Index 7193 Service Guide Disassembly, 39 —K— disassembling PC board assembly, 52 Kits disassembling print mechanism, 46 cabinet base kit, 61 disconnecting cables, 45 cover open switch kit, 61 disconnecting harnesses, 45 hardware kit, 62 removing ESD/EMC shield, 52 knife blade kit, 61...
  • Page 81 19 clearance, 6 Power voltage, 37 Print density receipt, 58 —M— Print mechanism Models, of 7193 printer, 1 disassembling, 46 Mounting power supply on wall, 19 removing, 42 Mounting printer on wall, 17 replacing, 53, 54 Print test —O—...
  • Page 82 Index 7193 Service Guide Reliability, 55 —T— Repacking printer, 5 Tallies. See level 3 diagnostics RS-232C interface Testing the printer, 15 communication cable diagrams, 64 Thermal paper communication connector and pin assignments, 63 ordering, 59 parameters, 8 requirements, 59 suppliers, 59 —S—...
  • Page 84 BD20-1440-A Issue B 0898 NCR is the name and mark of NCR Corporation © 1997 NCR Corporation Printed in U.S.A.

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