Epson TM-U200 series Technical Manual
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Epson TM-U200 series Technical Manual

Epson TM-U200 series Technical Manual

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C o n fid e n tia l

technical manual

TM-U200 Series (Type B)
Copied Date
199
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English
EPSON
4008524

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  • Page 1: Technical Manual

    C o n fid e n tia l technical manual TM-U200 Series (Type B) Copied Date Copied by English EPSON 4008524...
  • Page 2 INFORMATION OR ANY OTHER INFORMATION IN THE DOCUMENT, INCLUDING (WITHOUT LIMITATION) ANY WARRANTY OF TITLE OR NON-INFRINGEMENT. Seiko Epson has no liability for loss or damage arising from or relating to your use of or reliance on the information on the document.

  • Page 3: Fcc Compliance Statement

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual FCC CLASS A FCC Compliance Statement For American Users This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
  • Page 4 C o n fid e n tia l Introduction TM-U200 Series (Type B) printers are one-station printers for ECR and POS use that can print the results of weighing or measuring. The main features of the TM-U200 Series (Type B) printers are the following:...
  • Page 5 C o n fid e n tia l Notes and Cautions Note: Notes have important information and useful tips on the operation of your printer. CAUTION: Cautions must be observed to avoid damage to your equipment. Rev. A...
  • Page 6 C o n fid e n tia l Revision Sheet Revision Page Altered Items and Contents Rev. A Rev. A...

  • Page 7: Table Of Contents

    C o n fid e n tia l Contents Chapter 1 Features and General Specifications Features ................... 1-2 Printing Specifications .
  • Page 8 C o n fid e n tia l Chapter 2 Mechanism Configuration and Operating Principles Printer Mechanism Operating Principles ............. . . 2-1 Print mechanism unit .
  • Page 9 C o n fid e n tia l Chapter 4 Troubleshooting Self-test ................... 4-1 Initiating the Self-test .
  • Page 10 C o n fid e n tia l Main Assembly 3 (Case Unit) ............... . . 5-31 Main circuit board assembly .
  • Page 11 ERROR LED POWER LED PAPER OUT LED (PAPER OUT/PRESS FEED) PROM Power supply connector Drawer kick-out connector Frame ground screw Interface connector Frame ground screw DIP switches Figure 1-1 TM-U200 Series (Type B) appearance Rev. A Features and General Specifications 1-1...

  • Page 12: Features

    C o n fid e n tia l Features Printing Specifications Serial impact dot-matrix Printing method: Head wire configuration: 9-pin serial type 0.353 mm (0.014") 0.29 mm (0.01") (wire diameter) 0.317 mm (0.012") Figure 1-2 Dot configuration Dot pitch: 0.353 mm (1/72") Dot wire diameter 0.29 mm (0.01") Printing direction:...

  • Page 13: Character Specifications

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Character dimensions, characters per inch, characters per line Character Character Dot Spacing Character Structure Characters Per Characters Per Structure Dimensions Between Horizontal x Vertical Line (cpl)

  • Page 14: Paper

    C o n fid e n tia l Paper Paper types: Paper roll: Plain paper or pressure-sensitive paper Paper roll width: 76 ± 0.5 mm (2.99 ± .020") Paper roll maximum 83 mm (3.27") diameter: Paper roll core: Unless there is an optional near-end detector, you cannot use a paper roll with the core and paper glued together.

  • Page 15: Auto-Cutter

    Character font: 7 x 9 font (with descenders) Print pattern: ASCII 96-character rolling pattern. See the specification published by EPSON for the print pattern example. NOTE: Malfunctions and other problems may occur if a ribbon cassette other than the specified one is used.

  • Page 16: External Dimensions And Weight

    Depth: 248 mm (9.76") Approximately 2.5 kg (5.5 lb) Weight: Color: EPSON standard gray Environmental Specifications Temperature: Operating: 0° to 50° C (32° to 122° F) At 34° C (93° F) or higher, there are humidity restrictions; see the figure below.

  • Page 17: Reliability

    Height: 5 cm (1.97") Directions: Lift one edge and release it (for all 4 edges) Reliability Life 7,500,000 lines (See the TM-U200 Series (Type B) Specification for Mechanism: the print color switching number. Print head: 150 million characters (using an average of 2 dots/wire per character.) (The print pattern is shown in the TM-U200 Series...

  • Page 18: Hardware Configuration

    Paper end detector Print head unit Paper feed motor Home position sensor Carriage motor Paper roll near-end detector (optional) Interface circuit board Main circuit board Figure 1-6 TM-U200 Series (Type B) main unit configuration 1-8 Features and General Specifications Rev. A...

  • Page 19: Main Unit Specifications

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Unit Specifications Paper Feed Motor Type: 4-phase, 48-polarity, PM-type stepping motor Drive voltage: 24 VDC ± 10% 58 Ω ± 2.9 Ω at 25° C (77° F), per phase...

  • Page 20: Paper End Detector

    C o n fid e n tia l Paper End Detector Type: Microswitch Voltage: 5 VDC ± 5% Output level: High when paper end is detected Paper Roll Near-end Detector (Optional) Type: Microswitch Voltage: 5 VDC ± 5% Output level: Low when a paper near-end is detected Connectors Frame ground...

  • Page 21: Power Supply Connector

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Power Supply Connector This connector is used to connect the printer to an external power source. See the table below. Pin assignments: Power supply connector pin assignments...
  • Page 22 C o n fid e n tia l Drawer kick-out drive signal Output signal: Voltage = Approximately 24 VDC Current = 1 A or less Output waveform: Outputs the waveforms in Figure 1-8 to pins 2 and 5 of the connector. t1 (ON time) and t2 (OFF time) are specified by ESC p.

  • Page 23: Interface

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Interface RS-232 Serial Interface Data transmission: Serial (compatible with RS-232) Synchronization: Asynchronous Handshaking: DTR/DSR or XON/XOFF control Signal levels: MARK = -3 to -15 V: Logic 1/OFF...
  • Page 24 C o n fid e n tia l Interface Connector Pin Assignments RS-232 interface connector pin assignments and functions Pin number Signal name Function — Frame ground Transmit data Receive data Same as the DTR signal This signal indicates whether the host computer can receive data. SPACE indicates the host computer can receive data, and MARK indicates the host computer cannot receive data.
  • Page 25 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Switching between on line and off line The printer does not have an on-line/off-line button. It goes off line under the following conditions: Between the time when power is turned on (including reset using the interface) and when the printer is ready to receive data.

  • Page 26: Serial Interface (Option)

    C o n fid e n tia l Serial interface connection example Printer Host NOTES: Set handshaking so that transmitted data can be received. Transmit data to the printer after turning on the power and initializing the printer. RS-485 Serial Interface (option) Refer to the Appendix for details.
  • Page 27 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Interface Connector Pin Assignments IEEE 1284 interface connector pin assignments and functions Pin number Source Compatibility Mode Nibble Mode Byte Mode Host Strobe Host Clk Host Clk...
  • Page 28 C o n fid e n tia l Reception of status from the printer through the bidirectional parallel interface In bidirectional parallel interface operation, printer status transmission is available using the two-way communication facility of the IEEE 1284-compatible nibble/byte modes. In this case, unlike in RS-232 serial interface operation, real-time interruptions from the printer to the host are disabled, and so you must pay attention to the following.

  • Page 29: Buttons And Switches

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Notes on setting DIP switch 1-8 to ON The printer mechanism stops but does not become busy when an error occurs, printing stops for a paper end, or paper is fed using the FEED button.

  • Page 30: Dip Switches

    C o n fid e n tia l DIP Switches Serial interface (RS-232 and RS-485 (option)) The DIP switches are located at the bottom of the case. DIP switch 1 DIP Switch Function Data receive error Ignored Prints “?” Receive buffer capacity Data buffer 40 bytes Data buffer 1KB Handshaking...
  • Page 31 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual DIP switch 2 DIP Switch Function Print column selection 42CPL/35CPL 40CPL/33CPL 9 font/9 9 font Internal use (See Notes.) Undefined I/F Init reset signal Fixed to ON...

  • Page 32: Panel Leds

    C o n fid e n tia l Panel LEDs Power (POWER) LED: Green 24 V power supply is stable. Off: 24 V power supply is not stable. Paper roll near-end (PAPER OUT) LED: Paper roll near-end is detected. (*1) Off: Adequate paper remains on the paper roll (normal condition).

  • Page 33: Error Processing

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Error Processing Printer Operation When an Error Occurs The printer executes the following operations upon detecting an error: Serial interface All mechanical operations stop. DTR signal is set to MARK (only when DTR/DSR is selected and DIP switch 1-8 is off).

  • Page 34: Hexadecimal Dump

    C o n fid e n tia l Hexadecimal Dump This function prints data transmitted from the host computer in hexadecimal numbers and in their corresponding ASCII characters. Performing a Hexadecimal Dump 1. Turn the printer power off. 2. Set DIP switch 1-2 to on to select 40 bytes for the receive buffer capacity. 3.
  • Page 35 Compliance to safety regulation The following standards are applied only to the equipment with marks and statements UL/C-UL/TÜV NOTE: Use only the EPSON PS-170 power supply to avoid damage to the printer and the power supply. Rev. A Features and General Specifications 1-25...
  • Page 36 C o n fid e n tia l 1-26 Features and General Specifications Rev. A...

  • Page 37: Chapter 2 Mechanism Configuration And Operating Principles

    Chapter 2 Mechanism Configuration and Operating Principles Printer Mechanism Operating Principles The M-U200 printer mechanism mounted in the TM-U200 Series (Type B) is composed of six mechanisms: print, paper feed, ribbon feed, detector, auto-cutter, and ribbon switch. Figure 2-1 M-U200 Rev.

  • Page 38: Print Mechanism Unit

    C o n fid e n tia l Print mechanism unit The print mechanism unit consists of the parts shown in the figure below. Carriage shaft Print head unit Print head ground Belt tension plate assembly pulley Paper feed frame assembly Carriage guide shaft Carriage sub...

  • Page 39: Print Head Unit Movement

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Print head unit movement When the carriage motor is driven and the carriage motor gear moves in the direction of arrow B (forward rotation), the rotational power is conveyed to the belt drive pulley, then the belt. Next, the carriage sub assembly, which is fixed to the belt, moves in the direction of arrow B.

  • Page 40: Printing A Character (9X9 Font)

    C o n fid e n tia l Printing a character (9x9 font) A character is printed by energizing the print solenoids with respect to the carriage sub assembly portion. (The reference timing for the print solenoids is the carriage motor phase switching signals.) The print head unit moves 0.317 mm (0.012”) (in approximately 1.05 ms) each time the carriage motor rotates one step (7.5°).

  • Page 41: Paper Feed Mechanism Unit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Paper Feed Mechanism Unit The paper feed mechanism unit consists of the parts shown in the figure below. Paper feeding is performed by driving the paper feed motor (stepping motor).

  • Page 42: Paper Loading (Semi-Automatic Loading)

    C o n fid e n tia l Paper loading (semi-automatic loading) When the paper roll is manually inserted into the paper feed roller, the paper detection switch in the paper path detects the paper, and semi-automatic loading is executed. (Semi-automatic loading is the function that automatically feeds paper to the top of the paper feed frame assembly when a paper roll is inserted in the paper path after the detector detects no paper.) Paper feed...

  • Page 43: Ribbon Feed Mechanism Unit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual During printing, the paper feed motor is driven after each line is printed, causing the paper to be fed a specified amount. While the FEED button on the control panel is pressed, the paper feed motor is driven and the paper roll is fed.

  • Page 44: Ribbon Feeding

    C o n fid e n tia l Ribbon feeding When the carriage motor rotates forward and the carriage motor gear rotates in the direction of arrow A, the ribbon intermediate gear and ribbon drive gear rotate in the directions of arrows B and C, respectively.

  • Page 45: Detection Mechanism Unit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Detection Mechanism Unit The detection mechanism unit consists of the home position detection, paper detection, and near-end detection (optional) mechanisms. Paper detector Home position sensor Figure 2-11 Detection mechanism unit...

  • Page 46: Paper Detection Mechanism

    C o n fid e n tia l Paper detection mechanism The paper detection mechanism is located in the paper path. The mechanism provides paper end detection for the paper roll and semi-automatic loading by detecting presence or absence of the paper roll when it is inserted.

  • Page 47: Ribbon Switch Mechanism Unit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual movable blade drive pin in direction E to make the blade execute a cut. If the motor continues rotating, the wormwheel makes one rotation and it makes the movable blade return to the standby position and the cutting is finished.

  • Page 48: Electrical Circuitry Operating Principles

    C o n fid e n tia l ribbon release spring. When the carriage sub assembly moves in the E direction, the ribbon frame assembly and ribbon release lever return to their original positions because of the spring power of the ribbon frame spring. Ribbon release range Ribbon switch range Ribbon switch lever...
  • Page 49 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Circuit board block diagram The main circuit board unit contains the following electrical circuits: Power supply circuit Reset circuit CPU [internal RAM: 16K bits (2K x 8 bits)]...
  • Page 50 C o n fid e n tia l The figure below illustrates the circuit block diagram for the printer. Figure 2-17 Circuit board block diagram 2-14 Mechanism Configuration and Operating Principles Rev. A...

  • Page 51: Memory Map

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Memory Map The following parts are mapped on the printer memory map: EPROM (program) 0000H 0000H 0000H (For multi-lingual) Can not to be used. Cannot be used.

  • Page 52: Principles Of Operation

    C o n fid e n tia l Principles of Operation Power Supply Circuitry The power supply circuit is compact, uses a switching method, and is attached to the main circuit board. The following sections describe printer power supply circuitry. The following table shows power supply voltages and their usages.

  • Page 53: Control Circuitry

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Control Circuitry Reset circuit The reset circuit is used to prevent the CPU from operating erratically and the print head from printing unexpectedly during the period of unstable voltage immediately after power is turned on.

  • Page 54: Cpu

    C o n fid e n tia l The printer uses an external 8-bit and internal 16-bit CPU, with an external clock of 14.7 MHz. The CPU (U5) controls the internal processing of the printer according to the printer control program written in EPROM (U8).
  • Page 55 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual CPU pin functions Signal Name Level Description Function Connected to ceramic vibration generator. f=14.74 MHz ± 0.5%. Connected to ceramic. f=14.74 MHz ± 0.5%. External memory access. LOW: external ROM HIGH: internal ROM (CPU mask).
  • Page 56 C o n fid e n tia l CPU pin functions Signal Name Level Description Function PF A/DSW5 Paper feed motor driver control 2-2 phase PF B/DSW6 excitation. All terminals on (LOW): hold. DIP SW 1-5 to 1-8 read when P100, P101 are PF C/DSW7 LOW.

  • Page 57: Various Detector Circuits

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual RAM (CPU internal 2K bit) RAM is used as temporary storage for the following: Data received from the interface (receive buffer) Pattern data to be printed by the print head (printer buffer) Data used by the CPU (U5) during processing (flags, pointers, etc.).

  • Page 58: Host Interface Circuit

    C o n fid e n tia l A near-end detector is an option that detects the remaining amount of a paper roll. The input signal to the CPU (U5) becomes LOW when a paper near-end is detected. Mechanism 1 Printer mechanism P64/AN4 P65/AN5...

  • Page 59: Dip Switch Read Circuit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual The +24 V drawer power supply is supplied via the regulator IC (U2), which cuts off the supply in case of excessive current. {5 V {5 V...
  • Page 60 C o n fid e n tia l CPU (U5) pins 52 to 55, pins 56 to 59, and pins 1 and 81 are also used for the carriage motor drive circuit, paper feed motor drive circuit, and operation panel control circuit. The pins are used to read DIP switches temporarily immediately after the printer initialization (or the power is turned on).

  • Page 61: Printer Mechanism Driver Circuits

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Printer Mechanism Driver Circuits Print head driver circuit The head driver signal is output from CPU (U5) pins 64 to 72. Receiving this drive signal, transistor array QM1 and QM2 and transistor array QM3 turn On, Off, and drive the head.

  • Page 62: Paper Feed Motor Driver Circuit

    C o n fid e n tia l Paper feed motor driver circuit The paper feed motor (stepping motor) possesses an accurate angle of rotation and permits speed control. It is driven with 2-2 phase excitation. By turning P53 of the CPU to LOW, +24 V (labeled +24C signal in the figure below) is applied to the COM terminal of its coil, and it is made to run by changing P90, P91, P92 and P93 to HIGH and LOW.

  • Page 63: Auto-Cutter Driver Circuit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Auto-cutter driver circuit Rotating the DC motor counterclockwise or clockwise causes the auto-cutter to execute a full cut or a partial cut (one point left uncut). The driver IC (U6) has a full-bridge configuration and controls motor rotation, clockwise and counterclockwise.
  • Page 64 C o n fid e n tia l 2-28 Mechanism Configuration and Operating Principles Rev. A...

  • Page 65: Chapter 3 Handling And Maintenance

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Chapter 3 Handling and Maintenance Handling Precautions Storage Precautions Avoid storing the printer in a dusty, humid, or extremely cold area. Also avoid areas that are exposed to direct sunlight for long periods of time.

  • Page 66: Ribbon Cassette Handling Precautions

    C o n fid e n tia l Ribbon Cassette Handling Precautions Use only the ribbon cassette specified in Chapter 1 of this manual. If another ribbon cassette is used, any of the following may occur: Print quality deterioration Printer life may be shortened Ink may leak The ribbon may catch on the print head.
  • Page 67 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 4. Press the FEED button to remove the cut paper. 5. Remove the used paper roll. 6. Using scissors, cut the leading edge of the paper roll perpendicular to the paper feed direction, as shown below.
  • Page 68 C o n fid e n tia l 8. Open the auto-cutter by pulling the tab up and toward you. 9. Hold both edges of the paper and insert it straight into the paper slot. The printer feeds the paper automatically. 10.

  • Page 69: Replacing The Ribbon Cassette

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 11. Cut the paper on the manual cutter. 12. Close the auto cutter by using the tab. 13. Close the printer cover. 14. When the PAPER OUT light blinks, press the paper FEED button to set the printer on line.
  • Page 70 C o n fid e n tia l CAUTION: Never turn the ribbon cassette’s feed knob in the opposite direction of the arrow marked on the cassette; otherwise the ribbon cassette may be damaged. 5. Insert the ribbon in the position shown in the illustration below and push the ribbon cassette until it clicks.

  • Page 71: Removing Jammed Paper

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 6. Turn the ribbon cassette’s knob 5 or 6 times in the direction of the arrow again to take up any slack in the ribbon. Removing Jammed Paper...
  • Page 72 C o n fid e n tia l 2. Pull the paper and cut it at the position shown by the dotted line in the illustration below. Cut here 3. Remove the paper roll. 4. Open the auto cutter by pulling the tab up and toward you. 5.
  • Page 73 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Note: Do not pull the jammed paper in the opposite direction of paper feeding. 6. If paper still remains in the printer, follow the steps below.
  • Page 74 C o n fid e n tia l Note: Do not remove the screw from the print head cover. 9. Remove the print head cover. 10. Remove all the jammed paper. Note: Do not pull the jammed paper in the opposite direction of paper feeding. 11.
  • Page 75 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 13. If the auto cutter blade is not in its normal position (if you can see the blade in the auto cutter slit, the blade is not in the normal position), insert a screwdriver into the right side of the auto cutter and turn the gear inside to move the blade to the normal position.

  • Page 76: Using The Power Switch Cover

    C o n fid e n tia l Using the Power Switch Cover You can use the provided power switch cover to protect the power switch from accidental or improper operation. Attach the cover as shown in the illustration below. You can turn the power on or off with the switch cover attached by inserting a pointed object (like a ball point pen) through either of the two small holes on the switch cover.

  • Page 77: Inspection And Maintenance

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Inspection and Maintenance Proper performance of the inspection and maintenance procedures described below allows this unit to perform for the years of trouble-free operation for which it is designed.

  • Page 78: Cleaning

    The EPSON selection of lubricants prescribed for use with the printer is based on the results of such research. The prescribed EPSON lubricants are available in 40 cc (40 gr) metal cans or plastic containers (the smallest unit of supply).

  • Page 79: Lubrication Points

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Lubrication Points The following table describes the lubrication points, type, and class. The numbers in the following table correspond to the numbers in the lubrication and adhesive points diagrams in the Appendix on pages A-7 and A-8.
  • Page 80 C o n fid e n tia l Lubricants and adhesives list Lubricants and adhesives Type/name Quantity Grease/G-31 40 gr (1.4 oz) Oil/O-3 40 gr (1.4 oz) 3-16 Handling and Maintenance Rev. A...

  • Page 81: Chapter 4 Troubleshooting

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Chapter 4 Troubleshooting Use the following to troubleshoot and repair the printer: Self-test This procedure tests control circuitry (other than serial communication and parallel communication send / receive control) and the printer mechanism.

  • Page 82: Troubleshooting Flowchart

    C o n fid e n tia l Troubleshooting Flowchart If the source of a problem is not clear, use the flowchart below to find and replace the defective component. Normally, perform servicing by component replacement. Repairs of the PCBs and other components should be performed only by technicians.
  • Page 83 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 1 POWER LED does not light Is power supply cable connected properly? Connect power supply cable properly. Does external power supply have proper output voltage rating? (approximately +40 V in no-load Replace external power supply.
  • Page 84 C o n fid e n tia l 2 PAPER LED is lit. Turn the power on again. Is the paper roll near end sensor’s continuity normal?* Replace the near- end sensor. Replace printer mechanism assembly. Replace main PCB. (*) The near-end sensor is optional. 4-4 Troubleshooting Rev.
  • Page 85 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 3 Semi-automatic loading is not executed. Is paper jammed in the paper inlet path? Remove the paper. Is connector CN6 attached firmly? Attach connector firmly. Replace printer mechanism assembly.
  • Page 86 C o n fid e n tia l 4 Self-test is not normal. Does the printer not perform at all? Replace printer mechanism assembly. Is the output voltage of the regulator circuit on the main board within the specified range? (*) Replace the main PCB.
  • Page 87 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 5 The auto-cutter does not perform correctly. Disassembly of the auto-cutter unit is prohibited. If you disassemble it, performance cannot be guaranteed. Is there a paper jam in the auto-cutter? Remove jammed paper.

  • Page 88: Data From Host Is Not Printed Normally

    C o n fid e n tia l 6 Data from host is not printed normally. Set DIP switch 1–1 to OFF. Send data from host to printer. Is “?” printed? Are serial interface parameters set to identical values at host and printer? Make settings identical.

  • Page 89: Troubleshooting Tables

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Troubleshooting Tables The tables contain the following columns: Problem This is a symptom that can be verified. Probable cause This is a listing of one or several possible causes that should be examined.
  • Page 90 C o n fid e n tia l Table 4-1 Troubleshooting table for printer operation failure (continued) Problem Probable cause Level Checkpoint Action Data from the An incorrect interface Check if the interface cable Use the correct interface host is printed cable may be used.
  • Page 91 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Table 4-1 Troubleshooting table for printer operation failure (continued) Problem Probable cause Level Checkpoint Action Semi-automatic The paper supply Check if the paper roll meets Use the correct paper roll.
  • Page 92 C o n fid e n tia l Table 4-2 Troubleshooting table for bad printing (continued) Problem Probable cause Level Checkpoint Action Dots are missing The head FPC may be Check the continuity of the Replace the head FPC. occasionally. bad.
  • Page 93 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Table 4-2 Troubleshooting table for bad printing (continued) Problem Probable cause Level Checkpoint Action The paper feed Operation of the Check if the specified paper Use the correct paper roll.
  • Page 94 C o n fid e n tia l Table 4-2 Troubleshooting table for bad printing (continued) Problem Probable cause Level Checkpoint Action The print color is The ribbon cassette is Verify that the ribbon cassette Mount the ribbon cassette mixed. (Half of floating.

  • Page 95: Error Types And Countermeasures

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Error Types and Countermeasures Follow the flowcharts on the next page based on the ERROR LED blinking patterns in the table below and repair the printer. The printer does the following when an error occurs: All operations stop The printer goes off-line (when DIP SW 1-8 is off).
  • Page 96 C o n fid e n tia l Action 1 Action 1 Wait for the print head temperature to drop. Has the printer recovered from the error? Replace main PCB. Replace printer mechanism assembly. 4-16 Troubleshooting Rev. A...
  • Page 97 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Action 2 Action 2 Are there any chips of paper in the home position sensor? Remove paper. Is connector CN5 inserted firmly? Insert the connector firmly.
  • Page 98 C o n fid e n tia l Action 3 Action 3 Turn the printer power off. Does external power supply have proper output voltage rating? (approx. 40 V in no-load condition) Replace external power supply. Replace main PCB. Replace printer mechanism assembly. 4-18 Troubleshooting Rev.
  • Page 99 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Action 4 Action 4 Replace main PCB. Replace printer mechanism assembly. Rev. A Troubleshooting 4-19...
  • Page 100 C o n fid e n tia l 4-20 Troubleshooting Rev. A...

  • Page 101: Chapter 5 Disassembly, Assembly, And Adjustment

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Chapter 5 Disassembly, Assembly, and Adjustment Small Part Specifications This section uses abbreviations for small parts, such as screws and washers. The following is a list of these abbreviations and illustrations of the screw types.

  • Page 102: Disassembly

    C o n fid e n tia l Disassembly Removing the fuse 1. Turn off the printer. 2. Disconnect the external power supply. 3. Remove the main cover assembly from the printer. 4. Remove the lower plate from the printer. CPS-tite (M3x6) [0.59 to 0.78 N •...

  • Page 103: Removing The Print Head Unit

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Removing the print head unit 1. Remove 4 screws, and remove the upper case. 2. Remove the right side screw securing the auto-cutter fixing plate. Upper case...
  • Page 104 C o n fid e n tia l 4. Remove the ribbon frame spring and ribbon frame fixing plate; then remove the ribbon frame assembly. Ribbon frame fixing plate Ribbon frame assembly Ribbon frame spring 5. Remove the screw seuring the print head unit. 6.

  • Page 105: Removing The Auto-Cutter

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Removing the auto-cutter 1. Open the main cover assembly. 2. Remove 1 screw, and remove the auto-cutter cover. Remove the cable connector from the auto-cutter cover (See the second part of the illustration below). Then disconnect the auto- cutter cable from the cable connector for the auto-cutter.

  • Page 106: Removing The Main Circuit Board Assembly

    C o n fid e n tia l Removing the main circuit board assembly 1. Remove the lower plate. lower plate 2. Remove the interface circuit board assembly. Interface circuit board assembly 5-6 Disassembly, Assembly, and Adjustment Rev. A...
  • Page 107 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 3. Disconnect 5 cables. 4. Remove 5 screws. 5. Follow the steps below; then remove the main circuit board assembly. Slide the board toward the arrow...

  • Page 108: Sub-Assembly A

    C o n fid e n tia l Sub-assembly A Paper feed frame unit assembly 1. Apply G-31 to the middle of the paper hold roller shaft. 2. Pass the paper hold roller shaft through the paper hold plate spring and paper hold roller. Paper hold roller shaft Apply G-31 Paper hold...
  • Page 109 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 4. Attach the paper feed reduction gear to its shaft as shown in the second illustration below. Make sure that the reduction gear is closer to the frame than the roller assembly gear.
  • Page 110 C o n fid e n tia l 7. Attach the paper feed motor to the paper feed frame assembly with a screw. Paper feed motor CCS-tite (M3x6) [0.69 to 0.88 N • m (7 to 9 kgf • cm)] Paper feed frame assembly 8.
  • Page 111 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 9. Insert the ends of the paper hold roller shaft into the paper feed frame assembly, as shown below. Paper feed frame assembly Paper hold roller shaft (assembled) 10.

  • Page 112: Main Assembly 1

    C o n fid e n tia l Check that the corner edge of the paper hold plate spring is placed on the paper feed frame assembly as shown in the illustration below. Check that the paper hold plate spring is not deformed. Paper hold plate spring Corner edge Paper feed...
  • Page 113 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Check that the ribbon switch lever and ribbon release lever are attached in the proper directions. Notch Ribbon release lever Ribbon switch lever RE (3) Ribbon release spring Base frame assembly 4.

  • Page 114: Main Assembly 2

    C o n fid e n tia l Main Assembly 2 Tension plate assembly 1. Insert the tab of the tension plate assembly into the base frame assembly; then slide the tension plate in the direction of arrow 2 to lock it. Tension plate assembly Base frame assembly Main Assembly 3...

  • Page 115: Carriage Motor Assembly

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 3. Attach the screws. CBT-B (M3x10) Paper feed frame assembly [0.49 to 0.69 N • m (5 to 7 kgf • cm)] Rectangular hole Portion A...

  • Page 116: Carriage Sub Assembly

    C o n fid e n tia l 2. Hook the paper feed motor cable to hook A on the base frame assembly. Make sure to route the cable as shown in the illustration. 3. Route the carriage motor and paper feed motor cables outside the base frame as shown in the illustration.

  • Page 117: Main Assembly 6

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Assembly 6 Carriage shaft assembly Pass the carriage shaft through the paper feed frame assembly and carriage sub assembly. At this time, hook the paper hold spring feet to the carriage shaft’s dowels, as shown in the illustration.

  • Page 118: Main Assembly 7

    C o n fid e n tia l Main Assembly 7 Adjustment roller shaft holder assembly 1. Attach the adjustment roller shaft holders to the carriage shaft as shown in the illustration. Adjustment roller Carriage shaft shaft holder 2. Push the adjustment roller shaft holders and turn them 90 degrees in the direction of arrow C.

  • Page 119: Main Assembly 8

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Assembly 8 Carriage guide shaft assembly 1. Insert the carriage guide shaft through the base frame assembly and carriage sub assembly and lock it with the RE.

  • Page 120: Main Assembly 10

    C o n fid e n tia l 3. Move the belt tension spring from the paper feed frame’s hook to the base frame hook. Base frame hook Belt tension spring Main Assembly 10 Sensor assembly 1. Insert the sensor portion of the sensor assembly into the base frame assembly; then attach the board by pushing it in.

  • Page 121: Main Assembly 11

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 5. Position the paper detection switch sub assembly lead wires as shown in the illustrations, and make sure that the lead wires are as close as possible to the base frame surface.

  • Page 122: Main Assembly 12

    C o n fid e n tia l Check that surface B of the carriage motor heat sink and surface A of the paper feed frame are the same height. If not, adjust the heat sink to make the surfaces the same height. Check that the motor cables are not caught on the heat sink Surface B Carriage motor...
  • Page 123 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 3. Pass the straight side of print head FPC through the slit in the base frame assembly Projection Print head FPC Straight side Base frame assembly Arm section 4.

  • Page 124: Main Assembly 13

    C o n fid e n tia l Main Assembly 13 Print head unit 1. Attach the print head FPC to the print head unit. 2. Place the print head FPC under the hooks on the carriage sub assembly, and then secure the print head unit to the carriage sub assembly with the screw.

  • Page 125: Main Assembly 14

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Make sure there is space between the slanting edge of the print head FPC and slanting side of the carriage sub assembly, and between the FPC edge and portion A. If there is no space, the print head FPC may not be inserted into the print head unit firmly.

  • Page 126: Main Assembly 15

    C o n fid e n tia l Main Assembly 15 Ribbon frame earth plate 1. Put the ribbon frame earth plate in the carriage guide shaft. Ribbon frame earth plate Carriage guide shaft Main Assembly 16 Ribbon frame assembly, ribbon frame spring, and ribbon frame fixing plate 1.
  • Page 127 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 2. Apply G-31 to the tip of release point of the ribbon frame assembly on the base frame assembly. (A point of lubrication: diameter 1 mm) 3.

  • Page 128: Main Assembly 17

    C o n fid e n tia l Main Assembly 17 Thumb-screw and head cover 1. Place the thumb-screw into the hole in the head cover and secure the RE (2.5) in the center of the thumb-screw. 2. Insert the tab of the head cover into the left cover fixing plate first, and then rotate and secure with the thumb-screw while aligning the dowel.

  • Page 129: Main Assembly 1 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Assembly 1 (Case Unit) Lower cutter plate assembly 1. Attach the lower cutter plate to the upper plate and secure it with the screws. CPS-tite (M3x6) [0.59 to 0.78 N •...

  • Page 130: Main Assembly 2 (Case Unit)

    C o n fid e n tia l Main Assembly 2 (Case Unit) Upper plate assembly 1. Turn over the printer mechanism assembly. 2. Align the rectangular hole with the hook, hole A with dowel B, and then secure the plate with the screw.

  • Page 131: Main Assembly 3 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Note: When you remove the upper plate, lift it up in the direction of arrow 1 slightly; then move it in the direction of arrow 2 to release the hook to remove the plate completely.
  • Page 132 C o n fid e n tia l Make sure to use the correct screw for each location. CP(0) (M3x6) CP(0)(M3x6) [0.59 to 0.78 N • m [0.59 to 0.78 N • m (6 to 8 kgf • cm)] (6 to 8 kgf • cm)] CPS-tite (M3x6) CPS-tite (M3x6) [0.59 to 0.78 N •...

  • Page 133: Main Assembly 4 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Assembly 4 (Case Unit) Inserting the cables 1. Insert the lead wires of the print head FPC, the sensor assembly, and the auto-cutter assembly into the connectors.
  • Page 134 C o n fid e n tia l 2. Bring out the paper feed motor and carriage motor cables through portion C and the sensor assembly lead wires through portion D. 3. Secure the lower case with the screws. [Adjustment] Perform the platen gap adjustment by referring to the Adjustment section at the end of this chapter.

  • Page 135: Main Assembly 6 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Assembly 6 (Case Unit) Manual cutter assembly and auto-cutter fixing plate 1. Attach the manual cutter to the paper feed frame assembly and secure it with the screw.
  • Page 136 C o n fid e n tia l 2. While aligning the dowels, install the auto-cutter fixing plate and secure it with the screw. 3. Secure the earth plate with the screw. CBS-tite (M3x5) [0.59 to 0.78 N • m (6 to 8 kgf •...

  • Page 137: Main Assembly 7 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Main Assembly 7 (Case Unit) Auto-cutter assembly 1. To attach the auto-cutter assembly to the auto-cutter plate assembly, fit the auto-cutter assembly onto the left dowel of the auto-cutter plate assembly first, and then fit the right side onto the right to match the right dowel.
  • Page 138 C o n fid e n tia l 5. Attach the auto-cutter plate assembly to the auto-cutter fixing plate. Make sure the holes for the shafts of the auto-cutter plate assembly match the holes in the auto-cutter fixing plate. Insert the hook end of the spring in the hole in the auto-cutter plate assembly first, and the auto-cutter plate spring shaft and auto-cutter plate shaft in the holes of the auto-cutter fixing plate and secure them with the RE (3).

  • Page 139: Main Assembly 8 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 7. Insert the connectors you connected in step 6 into the slit in the auto-cutter cover. Insert the cable wires of the auto-cutter into the other slit in the auto-cutter cover.
  • Page 140 C o n fid e n tia l 4. While holding the auto-cutter as shown in the illustration, attach the upper case to the lower case and secure it with the screws. 5. Apply G-31 to both ends of the guide roller. 6.
  • Page 141 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Rev. A Disassembly, Assembly, and Adjustment 5-41...

  • Page 142: Main Assembly 9 (Case Unit)

    C o n fid e n tia l Main Assembly 9 (Case Unit) Interface circuit board assembly and connector plate 1. Turn over the printer. 2. Attach the connector plate to the interface circuit board assembly and secure with the hexagon lock screws (serial interface) or the CPS-tite screws (parallel interface).

  • Page 143: Main Assembly 10 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Parallel Interface CPS-tite(M3 6) (4 to 6 kgf • cm) Interface circuit board assembly Check that the interface board assembly is firmly connected to the main circuit board assembly.

  • Page 144: Main Assembly 11 (Case Unit)

    C o n fid e n tia l 3. Attach the rubber feet to the lower case. For the rubber foot attached to the front of the printer, turn the foot lightly until it stops. CPS-tite (M3x6) [0.59 to 0.78 N • m (6 to 8 kgf •...

  • Page 145: Main Assembly 12 (Case Unit)

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 2. Secure the hinge assembly of the main cover assembly to the upper case with the screws (2 portions). Main cover assembly CPT-B (3x12) (0.59 to 0.78 N • m (6 to 8 kgf • cm)]...
  • Page 146 C o n fid e n tia l 2. Connect the lead wire assembly’s connector to the near-end detector and attach it to the near-end detector frame with the screw. CBB-tite (M2x8) [0.1 to 0.2 N • m (1 to 2 kgf • cm)] Near-end detector Lead wire assembly Near-end detector...
  • Page 147 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 4. Attach the spacers (if desired) and near-end detector assembly to the lower case and secure them with the screws. Make sure the spacers are positioned in the correct direction, as shown in the illustration.

  • Page 148: Adjustment

    C o n fid e n tia l After assembling the near-end detector assembly, make sure the near-end detection lever moves smoothly. Adjustment Platen gap adjustment 1. Turn the ribbon frame knob in the direction of the arrow to remove the ribbon frame assembly from the printer and remove the manual cutter.
  • Page 149 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual 4. Perform the adjustment at two positions. Ribbon frame assembly Ribbon frame knob Portion A Scaling guage Paper hold plate spring Wide Print head unit Narrow...
  • Page 150 C o n fid e n tia l 5-50 Disassembly, Assembly, and Adjustment Rev. A...

  • Page 151: Appendix

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Appendix RS-485 Serial Interface Data transmission: Bit serial Synchronization: Asynchronous Handshaking: Depends on the DIP switch settings (DTR/DSR or XON/XOFF control ) Signal levels: 2.0 V to 5.0 V: Logic 1 0.0 V to 0.8 V: Logic 0...
  • Page 152 C o n fid e n tia l If the electric potential of CS1 is higher than CS2, the TM series printer is ready for communication (the host is ready to receive data). If the electric potential of CS1 is lower than CS2, the TM series printer is not ready for communication (the host is not ready to receive data).
  • Page 153 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual RS-485 interface connector pin assignments and functions Pin number Signal name Function — Frame ground Transmit data Transmit data Receive data Receive data — Signal ground 1) When DTR/DSR is selected, this signal indicates whether the host computer is BUSY or READY.
  • Page 154 C o n fid e n tia l XON/XOFF Transmission Timing When XON/XOFF control is selected by the DIP switch, the printer transmits XON/OFF to the host according the table below. NOTE: For the different models, XON/XOFF transmission timing differs, depending on the settings of the off-line conditions by the DIP switches.
  • Page 155 C o n fid e n tia l TM-U200 Series (Type B) Technical Manual "L" indicates: Printer transmission data SD1 > SD2 Printer reception data RD1 > RD2 The transmission data is H = 1, L = 0 Note: This format is used when the UART for RS-232 is connected to the RS-485 driver.

  • Page 156: Main Circuit Board Parts Layout

    C o n fid e n tia l Main Circuit Board Parts Layout Appendix A-6 Rev. A...

  • Page 157: Rs-232 Serial Interface Circuit Board Parts Layout

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual RS-232 Serial Interface Circuit Board Parts Layout Rev. A Appendix A-7...

  • Page 158: Ieee 1284 Parallel Interface Circuit Board Parts Layout

    C o n fid e n tia l IEEE 1284 Parallel Interface Circuit Board Parts Layout Appendix A-8 Rev. A...

  • Page 159: Rs-485 Serial Interface Circuit Board Parts Layout

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual RS-485 Serial Interface Circuit Board Parts Layout Rev. A Appendix A-9...
  • Page 160 C o n fid e n tia l Appendix A-10 Rev. A...

  • Page 161: Main Circuit Board Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Appendix Main Circuit Board Diagram +24B DSR RST #25 RST #RST DSR OR #25 CR A/DSW1 DSW2 CR C/DSW3 PLED/DSW0 ELED/DSW9 (ROTOR) DSW1 CR B/DSW2 CR A...

  • Page 162: Rs-232 Serial Interface Circuit Board Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual RS-232 Serial Interface Circuit Board Diagram TO MAIN BOARD DK 1 DK S +24V +12V +24V HOST RTS I/F DET CLKOUT/DTR CLKREQ DK 2 DK G...

  • Page 163: Ieee 1284 Parallel Interface Circuit Board Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual IEEE 1284 Parallel Interface Circuit Board Diagram DD5V CEN7..0 RM12 RM11 U11D CEN0 CEN1 CEN2 CEN3 CEN4 CEN5 CEN6 CEN7 -STB/HOSTCLK DATA1 DATA2 DATA3 DATA4 DATA5...

  • Page 164: Rs-485 Serial Interface Circuit Board Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual RS-485 Serial Interface Circuit Board Diagram TO MAIN BOARD DK 1 DK S +24V +24V HOST_RTS CLKIN/DTR CLKREQ TO HOST DK 2 DK G DK P...

  • Page 165: Printer Mechanism Unit Overall Exploded Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Printer Mechanism Unit Overall Exploded Diagram CPP-tite (M3 x 10) Print head FPC CCS-tite (M3 x 6) Print head unit Belt Left cover fixing plate J feed roller shaft holder (left)

  • Page 166: Case Unit Overall Exploded Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Case Unit Overall Exploded Diagram CBS-tite (M3 x 5) Main cover assembly CPS-tite (M3 x 6) Auto-cutter lock lever Auto-cutter Auto-cutter cover Lower cutter plate spring...

  • Page 167: Printer Mechanism Unit Lubrication Points Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Printer Mechanism Unit Lubrication Points Diagram (1) O-10 (5) G-31 (6) G-31 (7) G-31 (2) G-31 (8) G-31 (7) G-31 Rev. A Appendix A-17...

  • Page 168: Case Unit Lubrication Points Diagram

    C o n fid e n tia l TM-U200 Series (Type B) Technical Manual Case Unit Lubrication Points Diagram (3) G-31 (3) G-31 (4) G-31 (4) G-31 Rev. A Appendix A-18...
  • Page 169 C o n fid e n tia l EPSON SEIKO EPSON CORPORATION Printed in Japan E9711140-0000SE...

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