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NCR 7193 Service Manual
Summary of 7193
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Bd20-1440-a issue b august 1998 ncr 7193 thermal receipt printer service guide.
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The product described in this book is a licensed product of ncr corporation. It is the policy of ncr corporation (ncr) to improve products as new technology, components, software, and firmware become available. Ncr, therefore, reserves the right to change specifications without prior notice. All fea...
Page 3: Contents
7193 service guide contents august 1998 vii contents chapter 1: about the 7193 printer 1 models ........................................................................................................................................ 1 communication interfaces............................................
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Contents 7193 service guide august 1998 viii chapter 4: troubleshooting 33 operator panel lights.......................................................................................................... ... 33 field effect transistors (fets)) ............................................................
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7193 service guide contents august 1998 ix appendix b: ordering paper and supplies 59 ordering thermal paper ........................................................................................................ 59 ordering other supplies...............................................................
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Contents 7193 service guide august 1998 x.
Page 7: Models
7193 service guide chapter 1: about the 7193 printer august 1998 1 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. The printer is smal...
Page 8: Features
Chapter 1: about the 7193 printer 7193 service guide august 1998 2 features all models come with the following features: • drop-in paper loading which does not require using a spindle or threading the paper through a paper path • host-selectable 44 or 56 columns of print on 80 mm wide “fax grade” th...
Page 9: Cleaning The Printer
7193 service guide chapter 1: about the 7193 printer august 1998 3 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 ...
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Chapter 1: about the 7193 printer 7193 service guide august 1998 4.
Page 11: What Is In The Box?
7193 service guide chapter 2: installing the printer august 1998 5 chapter 2: installing the printer what is in the box? The following items are packed in the shipping box (printers shipped in bulk may not include all of these items): • printer enclosed in a plastic bag and foam pack • thermal paper...
Page 12: Choosing A Location
Chapter 2: installing the printer 7193 service guide august 1998 6 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 ...
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7193 service guide chapter 2: installing the printer august 1998 7 note: switch #1 is used to toggle between regular communication with the host computer and level 1 diagnostics (used for the printer functions and level 1 diagnostic tests): • switch #1 set to off: printer is ready to communicate wit...
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Chapter 2: installing the printer 7193 service guide august 1998 8 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” in the “diagnostics” chapter for m...
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7193 service guide chapter 2: installing the printer august 1998 9 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. Do not select the ack handshaki...
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Chapter 2: installing the printer 7193 service guide august 1998 10 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) of...
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7193 service guide chapter 2: installing the printer august 1998 11 connecting cash drawer cables the cash drawer option is available with rs-232c interface and parallel interface models. This option allows up to two cash drawers to be connected to the printer in a system with a pc that has no conne...
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Chapter 2: installing the printer 7193 service guide august 1998 12 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 an...
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7193 service guide chapter 2: installing the printer august 1998 13 parallel models.
Page 20: Turning On The Printer
Chapter 2: installing the printer 7193 service guide august 1998 14 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 t...
Page 21: Testing The Printer
7193 service guide chapter 2: installing the printer august 1998 15 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” chap...
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Chapter 2: installing the printer 7193 service guide august 1998 16.
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7193 service guide chapter 2: installing the printer august 1998 17 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. The kit contains a mounting brack...
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Chapter 2: installing the printer 7193 service guide august 1998 18.
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7193 service guide chapter 2: installing the printer august 1998 19 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 ...
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Chapter 2: installing the printer 7193 service guide august 1998 20
Page 27: Chapter 3: Diagnostics
7193 service guide chapter 3: diagnostics august 1998 21 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 swi...
Page 28: Level 1 Diagnostics
Chapter 3: diagnostics 7193 service guide august 1998 22 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...
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7193 service guide chapter 3: diagnostics august 1998 23 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). Caution: the dip switches are pre-set at ...
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Chapter 3: diagnostics 7193 service guide august 1998 24 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 (...
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7193 service guide chapter 3: diagnostics august 1998 25 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. If you must change them, do so carefull...
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Chapter 3: diagnostics 7193 service guide august 1998 26 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. If you mu...
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7193 service guide chapter 3: diagnostics august 1998 27 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 th...
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Chapter 3: diagnostics 7193 service guide august 1998 28 ignoring/using the carriage return this function allows the printer to ignore or use the carriage return (hex 0d) command depending on the application. Some applications expect the command to be ignored while others use the command as a print ...
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7193 service guide chapter 3: diagnostics august 1998 29 4. 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. 5. Turn the power off. 6. Set the dip switches to the former settings. Dip switch 1 must be off ...
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Chapter 3: diagnostics 7193 service guide august 1998 30 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...
Page 37: Level 2 Diagnostics
7193 service guide chapter 3: diagnostics august 1998 31 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 kn...
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Chapter 3: diagnostics 7193 service guide august 1998 32.
Page 39: Chapter 4: Troubleshooting
7193 service guide chapter 4: troubleshooting august 1998 33 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. Lights...
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Chapter 4: troubleshooting 7193 service guide august 1998 34 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 august 1998 35 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...
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Chapter 4: troubleshooting 7193 service guide august 1998 36 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. Replace ...
Page 43: Electronic Problems
7193 service guide chapter 4: troubleshooting august 1998 37 electronic problems problem possible causes what to do power voltage too low/high improper connections in printer. Check that all cable connections are correct and that the power supply (if present) is plugged in and the printer is on-line...
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Chapter 4: troubleshooting 7193 service guide august 1998 38 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..
Page 45: Getting Started
7193 service guide chapter 5: disassembling and reassembling the printer august 1998 39 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...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 40 removing the receipt cover 1. Turn off the host system or unplug the power supply (if used). 2. Disconnect the communication and power cables. Models receiving power from the host system (integrated) use one cabl...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 41 note: the platen cannot be replaced on knife units. The receipt cover comes complete as a kit and cannot be disassembled. Replacing the platen 1. Slide one end of the platen shaft into the slot on the receipt cov...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 42 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 ...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 43 4. 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. 5. Turn the printer back over so it is right side up. Cau...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 44 separating the print mechanism and pc board assembly 1. 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 screwd...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 45 disconnecting cables see the illustration on the facing page for the locations of the connectors on the pc board. 1. Remove the following cables by gently tugging on the connector. • j1, sensor connector • j2, mo...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 46 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) • paper feed moto...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 47 replacing the knife assembly 1. Place the left knife support over the left side of the knife blade. 2. Slide the rotating blade into the right-hand knife support. 3. Replace the two screws in the left-hand knife ...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 48 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. 1. Unscrew...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 49 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...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 50 replacing the knife motor 1. 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. 2. Replace the...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 51 replacing the switches 1. For each switch, reattach the faston terminals on the harness to the rearmost spade on the switch. 2. Replace the paper out switch in its proper position under the paper path area and in...
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Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 52 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...
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7193 service guide chapter 5: disassembling and reassembling the printer august 1998 53 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. 1. Place the pc board next to the right side o...
Page 60: Finishing Up
Chapter 5: disassembling and reassembling the printer 7193 service guide august 1998 54 replacing the print mechanism see “removing the print mechanism and pc board assembly” for more information. 1. Lift the entire mechanism/board assembly and place it in the cabinet. The mounting shelf (in the rea...
Page 61: Appendix A: Specifications
7193 service guide appendix a: specifications august 1998 55 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 ...
Page 62: Power Requirements
Appendix a: specifications 7193 service guide august 1998 56 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...
Page 63: Printing Specifications
7193 service guide appendix a: specifications august 1998 57 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) ...
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Appendix a: specifications 7193 service guide august 1998 58 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 dot...
Page 65: Ordering Thermal Paper
7193 service guide appendix b: ordering paper and supplies august 1998 59 appendix b: ordering paper and supplies ordering thermal paper the 7193 requires qualified thermal thermal paper with the following dimensions: diameter length width 83 mm max. (3.27 in.) 83 meters (273 ft.) 80 mm ± .2 mm (3.1...
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Appendix b: ordering paper and supplies 7193 service guide august 1998 60
Page 67: Appendix C: Kits
7193 service guide appendix c: kits august 1998 61 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 ground strap screws pla...
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Appendix c: kits 7193 service guide august 1998 62 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 screws ...
Page 69: Appendix D: Connectors
7193 service guide appendix d: connectors august 1998 63 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. It is ...
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Appendix d: connectors 7193 service guide august 1998 64 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..
Page 71: Parallel Connector
7193 service guide appendix d: connectors august 1998 65 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 thi...
Page 72: Cash Drawer Connectors
Appendix d: connectors 7193 service guide august 1998 66 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...
Page 73: Appendix E: Commands
7193 service guide appendix e: commands august 1998 67 appendix e: commands the commands control all operations and functions of the 7193 printer, from selecting the size and placement of characters and graphics on the receipt to feeding and cutting the paper. Note: all versions of the 7193 use the ...
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Appendix e: commands 7193 service guide august 1998 68 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 • opening the cash drawers • ...
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7193 service guide appendix e: commands august 1998 69 printer function commands hex code command 1b 61 n align character positions 1b 63 34 n select sensors to stop printing (not implemented) 1b 63 35 n enable or disable panel switch 1b 64 n print and feed n lines 1b 6a k read from non-volatile mem...
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Appendix e: commands 7193 service guide august 1998 70 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 position1 1b 2a m etc. Set bit image mode 1b 4b etc. Single-density gr...
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7193 service guide appendix e: commands august 1998 71 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. Hri means huma...
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Appendix e: commands 7193 service guide august 1998 72.
Page 79: Index
7193 service guide index august 1998 73 index —7— 7150 response mode, 27 7193 printer cleaning, 3 clearance, 6 description, 1 dimensions, 6, 56 disassembling, 39 environmental conditions, 55 features, 2, 55 installation. See installation kits, 61 location, choosing, 6 models, 1 options, 2 ordering s...
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Index 7193 service guide august 1998 74 disassembly, 39 disassembling pc board assembly, 52 disassembling print mechanism, 46 disconnecting cables, 45 disconnecting harnesses, 45 removing esd/emc shield, 52 removing knife assembly, 46 removing knife motor, 49 removing l cover, 41 removing paper feed...
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7193 service guide index august 1998 75 level 2 diagnostics, 31 level 3 diagnostics, 31 lines per inch, default, 25 location choosing, 6 clearance, 6 —m— models, of 7193 printer, 1 mounting power supply on wall, 19 mounting printer on wall, 17 —o— operator panel, 31 lights, 33 options, 2 ordering ca...
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Index 7193 service guide august 1998 76 reliability, 55 repacking printer, 5 rs-232c interface communication cable diagrams, 64 communication connector and pin assignments, 63 parameters, 8 —s— sensors. See switches service kits. See kits setting switches, 6 lcsio address bits, 10 parallel, 9 rs-232...
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Bd20-1440-a issue b 0898 ncr is the name and mark of ncr corporation © 1997 ncr corporation printed in u.S.A..