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Epson TM-U950 Technical Manual

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  • Page 1 CONFIDENTIAL TM-U950/U950P Technical Manual Using this online technical guide The words on the left side of this screen are bookmarks for all the topics in this guide. Use the scroll bar next to the bookmarks to find any topic you want.
  • Page 2 Technical manual TM-U950/TM-U950P Copied Date Copied by English 4005789...
  • Page 3 CONFIDENTIAL EPSON SEIKO EPSON CORPORATION Printed in Japan E96010130-0000SE...
  • Page 4 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 5 CONFIDENTIAL TM-U950/TM-U950P 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. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 6 The TM-U950 printer is an ESC/POS compatible high-performance point of sale (POS) printer which can handle receipt, journal, and slip paper. There are two models: the TM-U950 and the TM-U950P. The TM-U950P has a parallel interface. Differences between the two models are noted throughout this manual.
  • Page 7 CONFIDENTIAL TM-U950/TM-U950P Technical Manual About This Manual Chapter 1 provides general specifications and hardware configuration information. Chapter 2 provides general operating principles and printer mechanism configuration information. Chapter 3 provides handling and maintenance information. Chapter 4 provides troubleshooting information. Chapter 5 provides printer disassembly, assembly, and adjustment instructions.
  • Page 8 CONFIDENTIAL Revision Sheet Revision Page Altered Item and Contents Rev. A Rev. A...

  • Page 9: Table Of Contents

    CONFIDENTIAL TM-U950/TM-U950P Technical Manual Contents Chapter 1 Features and General Specifications Features ...................................... 1-1 General Specifications ................................1-3 Printing Specifications ..............................1-3 Character Specifications ..............................1-4 Paper Specifications ................................. 1-5 Paper Roll Feed Mechanism ............................1-9 Journal Paper Take-up Mechanism ..........................1-9 Auto-cutter ..................................
  • Page 10 CONFIDENTIAL Chapter 3 Handling and Maintenance Handling .....................................3-1 Handling Precautions ...............................3-1 Loading the Paper Rolls ..............................3-2 Removing the Paper Rolls ..............................3-4 Inserting Slip Paper and Printing on Slip Paper ......................3-5 Printing on Personal Checks (only on printers with a MICR reader) (not available for the TM-U950P) ....3-6 Installing and Removing the Ribbon Cassette ......................3-8 Inserting the Stamp Set ..............................3-9 Mounting the Power Switch Cover ..........................3-10...
  • Page 11 MICR Board (for printers with a MICR reader) (Not available for the TM-U950P) ..........6-11 Parallel Interface Circuit Board Diagram ........................6-12 Main Circuit Board Parts Layout for TM-U950 ......................6-13 Main Circuit Board Parts Layout for TM-U950P......................6-14 Parallel Interace Circuit Board Parts Layout........................ 6-15 Overall Exploded Diagrams ............................

  • Page 12: Chapter 1 Features And General Specifications

    The TM-U950 printer is an ESC/POS compatible high-performance point of sale (POS) printer which can handle receipt, journal, and slip paper. There are two models: the TM-U950 and the TM-U950P. The TM-U950P has a parallel interface. Differences between the two models are noted throughout this manual.
  • Page 13 CONFIDENTIAL Figure 1-1. TM-U950 Appearance 1-2 Features and General Specifications Rev. A...

  • Page 14: General Specifications

    CONFIDENTIAL TM-U950/U950P Technical Manual General Specifications Printing Specifications Operation principle Serial impact dot-matrix printer Print head wire layout Serial 9-pin Dot pitch 0.353 mm (1/72”) Dot wire diameter 0.29 mm (.01”) Figure 1-2. Dot Configuration Print direction Bidirectional logic seek Print width (printable area) Paper roll: 61.1 mm (2.41”)

  • Page 15: Character Specifications

    400 dots (800 positions) per line Printing speed See Table 1-2. As shown in the table below, the TM-U950 has three printing modes, which differ in printing speed and head power time (impact). Table 1-1. Printing Operation Mode Operation mode...

  • Page 16: Paper Specifications

    CONFIDENTIAL TM-U950/U950P Technical Manual Figure 1-3. Character Size Paper Specifications Paper type Paper roll Wood-free paper (single layer only) Slip paper Plain paper Carbon copy paper Pressure-sensitive paper Paper dimensions Paper roll Paper width: 69.5 + 0.5 mm (2.74 + 0.02”) Maximum diameter: 83 mm (3.27”)
  • Page 17 CONFIDENTIAL Slip paper Dimensions: 70 x 70 to 210 x 297 mm (W x H) (2.76 x 2.76 to 8.27 x 11.69”) Thickness: 0.09 to 0.36 mm (.004 to .014”) Temperature and copying capability As copying capability is influenced by the ambient temperature, printing must be performed under the conditions described in Table 1-3.
  • Page 18 CONFIDENTIAL TM-U950/U950P Technical Manual Size: 68 to 102 mm x 152 to 210 mm (2.68 to 4.02” x 2.98 to 8.27”) Weight: 70 to 90 kg paper Notes on setting the print operation mode The GS E command sets print mode (printing speed and print head energizing time).
  • Page 19 CONFIDENTIAL Figure 1-5. Slip Insertion Sensor Position Figure 1-6. Paper Holes and Low Reflection Prohibited Area Print area Paper roll Figure 1-7. Paper Roll Print Area 1-8 Features and General Specifications Rev. A...

  • Page 20: Paper Roll Feed Mechanism

    CONFIDENTIAL TM-U950/U950P Technical Manual Slip paper Figure 1-8. Slip Paper Print Area *Note When the printer uses an MICR reader, this width is 5.0mm (0.20”). Paper Roll Feed Mechanism Feed principle Drop-in loading Paper roll near-end detection Separate sensors for receipt paper and journal paper.

  • Page 21: Stamp

    CONFIDENTIAL During standby Average approx. 0.3 A Operating MICR reader (when the printer used with the MICR reader) Mean - approximately 2.3 A (Approximately 1.4 seconds) Stamp Stamp mechanism is available as a factory option for the receipt side. Recommended stamp: Fuji Copian CSP-2042C Recommended ink: Fuji Copian Super Ink...

  • Page 22: Dimensions, Weight, Finish

    -10° to +50°C (14° to 122°F) (except ribbon) Humidity Operation: 30 to 80% (non-condensing; limit above 30°C: 30°C, 80%) Storage: 30 to 90% (non-condensing; except ribbon) Vibration resistance (in standard EPSON packing) Frequency: 5 to 55 Hz Acceleration: Sweep: 5 minutes (one way)

  • Page 23: Reliability

    CONFIDENTIAL Noise 63 dB (operating, measured in ANSI bystander position; printing on receipt and journal paper roll) Reliability Mechanics MCBF 5,000,000 lines (auto-cutter and stamp once every 15 lines) Life expectancy 7,500,000 lines (The printer’s life is considered over when the printer cannot function due to worn-out main parts such as motor, solenoids, frames, and shafts.) Life expectancy of print head...

  • Page 24: Hardware Configuration

    Hardware Configuration Main Unit Configuration Printer mechanism Figure 1-12. TM-U950 Printer Mechanism Main Unit Configuration Electrical circuit and unit on cases Figure 1-13. TM-U950 Electrical Circuit and Unit on Cases Main Unit Configuration Rev. A Features and General Specifications 1-13...

  • Page 25: Main Unit Specifications

    CONFIDENTIAL Main Unit Specifications Paper feed motors Receipt and journal paper feeding is performed by dedicated feed motors. Slip paper feeding is performed by using the journal paper feed motor and a journal/slip switching solenoid. Motor type 4-phase, 48-pole PM type stepping motor Drive voltage 24 V DC + 10% (including voltage drop caused by drive transistor) Winding resistance...
  • Page 26 CONFIDENTIAL TM-U950/U950P Technical Manual Drive voltage 24 V DC ± 10% (including voltage drop caused by drive transistor) Winding resistance 9 Ω ± 7% at 25 C (77 F), per phase ° ° Current consumption (per motor) Peak current: 1.5 A in worst case...
  • Page 27 CONFIDENTIAL Slip paper insert sensor This sensor is located in the slip paper loading path to detect the insertion of slip paper. Sensor type: Photosensor Voltage: 5 V DC ± 5% Input current: Approx. 20 mA Output level: High when slip paper is detected Slip paper eject sensor This sensor is located in the slip paper eject path to detect ejection of slip paper.

  • Page 28: Connectors

    × 100 Recognition rating (%) = Total number of checks Check paper used for test is EPSON standard check paper. Checks must be flat, without curls, folds, or wrinkles. Connectors All connectors are located on the rear panel of the printer. (Refer to Figure 1-1.)
  • Page 29 CONFIDENTIAL Drawer kick-out connector (modular connector) Pulse specified by ESC p command is output to this connector. The host can confirm the status of the input signal by using the DLE EOT, ESC u, GR r, or GS a (ASB) commands. Connector type: Printer side 52065-6615 (Molex) or equivalent...
  • Page 30 The drawer must be powered from the printer (connector pin 4). Do not drive the drawer continuously. Customer display connector (not supported on the TM-U950P) This connector is for Epson customer display (DM-D series). Do not connect other customer displays. Connector type: Receptacle 52065-8845 (Molex) or equivalent Table 1-6.
  • Page 31 CONFIDENTIAL Parity (*) None, even, odd Number of stop bits 1 or more Connector type D-SUB 25 female or equivalent (*)Can be set with DIP switches on the bottom of the unit (See Tables 1-9 and 1-10.) On-line/off-line switching This printer has no on-line/off-line switch. It automatically goes off-line in the following cases: During self-test.
  • Page 32 CONFIDENTIAL TM-U950/U950P Technical Manual Table 1-7. Interface Connector Specifications and Functions Pin number Signal name Function 1) When DTR/DSR control is selected, this signal indicates whether the printer is busy. MARK indicates busy and SPACE indicates not busy. The busy condition is changed using DIP switch 5 of the bank 2 as shown in Table 1-7a.
  • Page 33 CONFIDENTIAL XON/XOFF control When XON/XOFF control is selected, the XON and XOFF output timing is as described below. (XON code: 11H; XOFF code: 13H) Transmit timing differs depending on the DIP switch 5 of the bank 2. Table 1.8. XON/XOFF Transmit Timing DIP SW 2-5 status Printer status When the printer goes on-line after the power-on or reset with...
  • Page 34 CONFIDENTIAL TM-U950/U950P Technical Manual The following illustrates an example serial interface connection: Host (DTE example 8251) Printer When connected to a DCE-type device, data should not be sent non-stop (without handshake). DTE = Data Terminal Equipment DCE = Data Circuit Terminating Equipment Figure 1-16.
  • Page 35 CONFIDENTIAL TM-U950P printer status and signals Pin No. Source Compatibility mode Nibble mode Byte mode Host nStrobe HostClk HostClk Host/Printer Data0 (LSB) Data0 (LSB) Data0 (LSB) Host/Printer Data1 Data1 Data1 Host/Printer Data2 Data2 Data2 Host/Printer Data3 Data3 Data3 Host/Printer Data4 Data4 Data4 Host/Printer...
  • Page 36 CONFIDENTIAL TM-U950/U950P Technical Manual Interfacing conditions should be all based on the TTL level. In addition, both the rise time and fall time of each signal must be 0.5 µs or less. Data transmission should not ignore the signal nAck or Busy. An attempt to transmit data with either signal, nAck or Busy, ignored can cause lost data.
  • Page 37 CONFIDENTIAL Switching between on-line and off-line The TM-U950P printer does not have an on-line/off-line button. The printer goes off-line in the following conditions: Between the time when the power is turned on (including reset using the interface) and when the printer is ready to receive data. During the self-test.

  • Page 38: Switches And Buttons

    CONFIDENTIAL TM-U950/U950P Technical Manual Switches and Buttons The power switch is located on the front side of the printer, at the lower left. The operation panel buttons are located on the right top side of the printer. Two banks of DIP switches are located on the bottom of the printer.
  • Page 39 CONFIDENTIAL DIP switch settings for the TM-U950 Table 1-9. DIP Switch Bank 1 Switch number Function Data word length 7 bit 8 bit Parity check Parity type Even Data transfer rate Transfer rate (bps) 1200 2400 4800 9600 Connection of customer display (*)
  • Page 40 CONFIDENTIAL TM-U950/U950P Technical Manual DIP switch settings for the TM-U950P Table 1-9a. DIP Switch Bank 1 Switch number Function Undefined — — Undefined — — Undefined — — Undefined — — Undefined — — Internal use — Fixed Undefined —...
  • Page 41 CONFIDENTIAL Indicators The indicators are located on the operation panel. (See Figure 1-1.) POWER LED (green) Stable power (+5 V) is supplied. Off: Stable power (+5 V) is not supplied. ERROR LED (red) Printer is off-line (except when paper is being advanced with the FEED buttons and during self test printing).

  • Page 42: Functions

    CONFIDENTIAL TM-U950/U950P Technical Manual Blinking: Stand by for slip paper insertion Blinking pattern Blinking: Stand by for slip paper removal Blinking pattern Blinking: Personal check waiting state (when the printer is used with the MICR reader) Functions Error Processing Error detection When the printer detects an error, it carries out the following operation sequence: All running operations are stopped.

  • Page 43: Self-Test

    CONFIDENTIAL Data receive error When an error is detected in data received by the printer (parity, framing, or overrun error), the data is either ignored or replaced to “?”, depending on the DIP switch setting. Self-test The self-test checks the following items: Control circuit operation Printer mechanism operation Print quality...

  • Page 44: Printing Operation

    CONFIDENTIAL TM-U950/U950P Technical Manual Printing example. Hexadecimal Dump .!.&.@@ .%..C4.. ABCDEFGH Printing Operation Sensors and printing operation The ESC c 4 command can be used to select whether the printer should stop or continue printing when the “no paper” condition is detected. The following sensors are involved:...

  • Page 45: Options

    CONFIDENTIAL Options AC Adapter (PS-150) Specifications Input specifications Rated input voltage: 90 to 110 V AC (specified at time of purchase): 108 to 132 V AC 198 to 264 V AC Frequency: 48 to 62 Hz Rated input current: 1.0 A (100 V type) 1.0 A (120 V type) 0.5 A (230 V type) Power switch:...

  • Page 46: Chapter 2 Mechanism Configuration And Operating Principles

    CONFIDENTIAL TM-U950/U950P Technical Manual Chapter 2 Mechanism Configuration and Operating Principles Printer Mechanism Components The TM-U950 impact dot matrix printer consists of the following eight components: Printing assembly Sensor assembly Paper feed assembly Slip paper assembly Ribbon feed assembly Stamp assembly (for printers with a stamp assembly)

  • Page 47: Printer Mechanism Operating Principles

    CONFIDENTIAL Printer Mechanism Operating Principles Printing Assembly The printing assembly consists of the print head unit with nine vertical wires, and the parts shown in Figure 2-1. Figure 2-1. Printing Asssembly Print head unit movement When the carriage motor is driven, the gear wheel turns in the direction indicated by the arrow , and the carriage feed pulley and carriage drive belt transmit the driving force so that the head carriage fastened to the carriage drive belt moves in the direction of the arrow .
  • Page 48 CONFIDENTIAL TM-U950/U950P Technical Manual Printing operation Wire movement for printing a single dot 1. When the drive pulse is sent through the drive coil, a magnetic field is induced in the core, and the lever plate is pulled in the...

  • Page 49: Sensor Assemblies

    8 is powered. By continuing in this way, the character “2” is formed. Figure 2-4. Print Timing Chart Sensor Assemblies: The sensor functions of the TM-U950 and TM-U950P are as follows: Sensor Assembly Function Home position sensor assembly...
  • Page 50 CONFIDENTIAL TM-U950/U950P Technical Manual Figure 2-5. Sensor Assembly Home position sensor assembly The home position sensor assembly is mounted on the left side of the stroke of the head carriage. The sensor detects the movement of the sensor plate in the rear section of the head carriage, to determine the position of the head carriage and any possible malfunction.
  • Page 51 CONFIDENTIAL Carriage sensor assembly The carriage sensor assembly detects carriage motor rotation problems by using a rotary encoder. It consists of a set of gears mounted on the carriage motor wheel and a carriage sensor. This sensor uses an LED and photo IC arrangement. On the outer circumference of the carriage sensor gear, six sensor plates are mounted with equal spacing.
  • Page 52 CONFIDENTIAL TM-U950/U950P Technical Manual Slip paper insert sensor assembly The slip paper insert sensor assembly detects the tip of the paper when slip paper is being inserted and detects the end of the paper during printing. It is mounted immediately to the right of the paper set position.
  • Page 53 CONFIDENTIAL The paper sensor lever can rotate freely above the upper paper guide and is in constant contact with the paper roll, due to the internal spring pressure of the microswitch and its own weight. Therefore, when paper is present in the paper path, the paper sensor lever contacts the paper at an angle, as shown by the solid line in Figure 2-14, and the microswitch is on.

  • Page 54: Paper Feed Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Paper Feed Assembly The paper feed assembly consists of the parts shown in Figure 2-16. The paper feed motors drive the entire paper feed operation. Figure 2-16. Paper Roll Feed Assembly Semi-auto loading A pair of auxiliary paper feed rollers installed on the upper paper guide is linked with the auxiliary paper holder rollers at constant pressure.
  • Page 55 CONFIDENTIAL Immediately before the journal and receipt paper feed motors are driven, the carriage motor is activated and positions the carriage in the center of the paper width. After passing the paper feed rollers, the paper lifts the pawl of the auxiliary paper guide and thereby closes the guide. Therefore the paper from the paper roll cannot be advanced to the paper feed rollers merely by manual operation.
  • Page 56 CONFIDENTIAL TM-U950/U950P Technical Manual The auxiliary paper feed roller is set to a slightly smaller value than the paper advance amount. The difference becomes the slip in the friction clutch between the auxiliary paper feed roller and the transmission gear.

  • Page 57: Slip Paper Assembly

    CONFIDENTIAL separated from the paper feed roller (the dotted line in Figure 2-19). When section (A) of the release lever is not pushed farther, the paper holder spring returns the lever to the original position. Figure 2-19. Paper Release Operation Slip Paper Assembly The slip paper assembly consists of the parts shown in Figure 2-20.
  • Page 58 CONFIDENTIAL TM-U950/U950P Technical Manual Slip paper positioning operation A form stopper placed at a right angle in the slip paper path blocks the path due to the action of the form stopper spring (Figure 2-21). When the slip paper is inserted along the slip paper guide (lower) in the direction, the paper can enter as far as the stopper (Figure 2-21).
  • Page 59 CONFIDENTIAL Figure 2-22. Slip Paper Positioning (2) Figure 2-23. Slip Paper Positioning (3) 2-14 Mechanism Configuration and Operating Principles Rev. A...
  • Page 60 CONFIDENTIAL TM-U950/U950P Technical Manual Figure 2-24. Slip Paper Positioning Timing Chart Slip paper feed operation Following slip paper positioning, printing can be performed. After each line is printed, the journal paper feed motor is activated and turns the slip paper feed roller to advance the paper by a predetermined amount.

  • Page 61: Micr Reader Assembly (For Printers With A Micr Reader) (Not Available For The Tm-U950P)

    CONFIDENTIAL MICR Reader Assembly (for printers with a MICR reader) (not available for the TM-U950P) The main components of this assembly include those shown in the slip assembly section of this chapter, namely the MICR head assembly, carriage motor assembly, head carriage assembly, frame carriage assembly, MICR head holder change lever, MICR head holder frame, MICR head holder lever, MICR head holder roller, MICR transmission pulley, and MICR transmission belt.
  • Page 62 CONFIDENTIAL TM-U950/U950P Technical Manual The gear operation of this assembly, which carries out MICR reading of the check paper, backfeeding, and reverse-side printing, is the same as that of the slip feeding assembly. The only element which differs from the slip feeding assembly is the speed.

  • Page 63: Ribbon Feed Assembly

    CONFIDENTIAL Ribbon Feed Assembly The ribbon feed assembly is mounted on the right side of the carriage frame and consists of the parts shown in Figure 2-28. Figure 2-28. Ribbon Feed Assembly Ribbon feed operation When the carriage motor gear turns in the direction, the rotation is transmitted to the ribbon feed transmission gear and planet gear.

  • Page 64: Stamp Assembly (For Printers With A Stamp Assembly)

    CONFIDENTIAL TM-U950/U950P Technical Manual Therefore, the ribbon feed gear always turns in the direction, regardless of the rotation direction of the carriage motor. The ribbon feed gear is interlocked with the ribbon feed roller and ribbon feed holder roller inside the ribbon cassette, thus feeding the ribbon.

  • Page 65: Auto-Cutter Assembly

    CONFIDENTIAL Stamp operation When the stamp solenoid is powered, the ferrite core moves in the direction. Since the ferrite core serves as the pivot for the stamp drive lever, the lever rotates in the direction, causing the linked stamp lever to move in the direction.
  • Page 66 CONFIDENTIAL TM-U950/U950P Technical Manual Transmission mechanism The transmission mechanism consists of the cutter motor gear fastened on the cutter motor shaft, two reduction gears A, the reduction gear B, two drive gears on the drive gear shaft, and the cutter slider assembly. The cutter motor rotation is reduced and transmitted to the drive shaft via the reduction gears A and B.
  • Page 67 CONFIDENTIAL Cutting operation When the cutter motor is activated while the mechanism is in the home position (when the cutter blade does not protrude through the slit of the cutter blade cover and the reset signal is at high), the cutter motor rotates in the direction and the rotational force is transmitted to the transmission gear train.

  • Page 68: Paper Roll Take-Up Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Partial cut operation When the cutter motor is activated while the mechanism is in the home position, the reset signal changes from high to low, but the F/P position signal is maintained at high. When the motor continues to be powered and cutting starts, the F/P position signal changes from high to low.
  • Page 69 CONFIDENTIAL gear is linked to the take-up belt, the take-up pulley turns in the direction. The take-up clutch spring mounted between the take-up pulley and take-up gear transmits the force to the take-up gear and thus to the take-up shaft, which turns to take up the paper. Figure 2-39.

  • Page 70: Electrical Circuitry Operating Principles

    Electrical Circuitry Operating Principles Hardware Configuration The electrical circuitry of the TM-U950 is divided into the main PCB and the switch PCB unit. These connections are shown in Figs. 2-40, 2-41, and 2-42. MICR board (for printers with an MICR reader) (not available for the TM-U950P) Figure 2-40.
  • Page 71 CONFIDENTIAL Switch PCB unit FEED buttons LEDs (power, paper status, and error) Cover open sensor Main PCB Power supply circuit Reset circuit Memory (ROM: 512 KB, RAM: 64 KB, EEPROM) Gate array Operation panel control circuit Host interface circuit Drawer kick-out circuit Print head drive circuit Solenoid drive circuits Paper feed motor drive circuit...
  • Page 72 CONFIDENTIAL TM-U950/U950P Technical Manual Main Circuit Board Assembly Figure 2-41. Block Diagram of TM-U950 Main Board Circuit Board Unit Address bus Operation panel and cover sensor circuit Data bus Various sensor circuit Various solenoid EEPROM driving circuit Reset Paper feed...
  • Page 73 CONFIDENTIAL Figure 2-42. MICR Board Block Diagram (on printers with an MICR reader) (not available for the TM-U950P) Memory map This printer incorporates a 512 KB ROM (1 M in printers with an MICR reader, which is not available for the TM-U950P) and 64 KB of RAM. The memory map is as shown below. Figure 2-43.
  • Page 74 When a reset signal from the host is sent from the host interface (DSR, #25) more than 1 ms, the output of the reset IC becomes low and the CPU and other circuits are reset. Figure 2-44. Reset Circuit for the TM-U950 Reset circuit for the TM-U950P The reset IC (M51953BFP) monitors the +5 V voltage.

  • Page 75: Main Board Operating Principle

    IC (U9) switches the +24 V DC. The voltage is smoothed by L18, D13, and C49, and is supplied as the +5 V output. Figure 2-45. Power Supply Circuit for the TM-U950 Power supply circuit for the TM-U950P The 24 V DC at CN6 is filtered and supplied to the +24 V line and the +5 V regulator circuit.
  • Page 76 CONFIDENTIAL TM-U950/U950P Technical Manual Control circuitry CPU (M37702) The CPU controls all printer operations according to a control program in ROM. The CPU pin assignments are shown in Table 2-1. Table 2-1. CPU Pin Assignments CPU function Signal designation Level...
  • Page 77 CONFIDENTIAL Table 2-1. CPU Pin Assignments (continued) CPU function Signal designation Level Description number Clock input Clock input Enable signal L = Data read/write) Power supply HLDA HLDA Unused (open) Address latch enable signal H = address latch Unused (open) (R/W) (R/W) Read/write signal H = read, L = write...
  • Page 78 CONFIDENTIAL TM-U950/U950P Technical Manual Table 2-1. CPU Pin Assignments (continued) CPU function Signal designation Level Description number Address signal Bit 4 Address signal Bit 3 Address signal Bit 2 Address signal Bit 1 Address signal Bit 0 TXD signal output for the interface circuit board...
  • Page 79 CONFIDENTIAL As print buffer for pattern data to be sent to the print head As storage area for CPU processing functions (flags, pointers, etc.) EEPROM The EEPROM stores the slip paper insert sensor level. Data exchange with the CPU is performed via a serial link.
  • Page 80 Gate array function Signal designation` Level Description PC 5 POW_TRG Power control trigger signal Unused (connected to GND) on TM-U950 I/F PD 0 IF_DET circuit board identify signal on TM-U950P Unused (connected to GND) on TM-U950 PD 1 CLK_REQ synchronization clock request signal for TM-...
  • Page 81 CONFIDENTIAL Table 2-2. Gate Array Pin Assignments (continued) Pin number Gate array function Signal designation` Level Description AB 2 Address signal Bit 2 AB 3 Address signal Bit 3 AB 4 Address signal Bit 4 (R/W) (R/W) Read/write signal (CS) (CS) Chip select signal L = select Enable signal...
  • Page 82 SWSL signal (PB3). The SWCL signal (PB2) is used as a clock signal and the switch settings are read one bit at a time. Figure 2-47. DIP Switch Circuit for the TM-U950 Rev. A Mechanism Configuration and Operating Principles 2-37...
  • Page 83 (Refer to SW 7 and 8 of switch bank 2 in Table 1-8, DIP switch settings.) Then select the Seiko Epson customer display by setting DIP switch 6 on the bank 1 to ON. When this setting is in effect, the RTS signal which is output will be the AND of the DTR signal from the customer display and the DTR signal from the printer.
  • Page 84 CONFIDENTIAL TM-U950/U950P Technical Manual When neither the customer display nor the printer DTR signal is SPACE, the RTS signal is not SPACE either. When DIP switch 6 of the bank 1 is OFF, the same signal as the printer’s DTR signal is output to the RTS signal.
  • Page 85 CONFIDENTIAL Figure 2-49. Device Connection Block Diagram Host interface circuit for the TM-U950P TM-U950P printer has an IEEE 1284 interface for connection to the host computer. Control CPU (I/F circuit board U2) controls the transmission between the host computer, and the CPU converts the received data to the serial data, and then the CPU sends the data to the main circuit board.
  • Page 86 CONFIDENTIAL TM-U950/U950P Technical Manual The drawer drive signal is also supplied to the IM-403/405 through CN9 for the TM-U950 only. Figure 2-50. Drawer Kick-out Circuit for the TM-U950 { 5V G-PS24 UNTRG-HIZ DKD2 DKD 1 DKD1 { 5V DKD1 DKD1...
  • Page 87 CONFIDENTIAL The HDBC signal is a head current limiter. When the head current duration exceeds 0.1s due to an error, this signal turns the head off. The limit time is determined by C20 and R44 and retriggered at the falling edge of the HD_COM signal. Head temperature is measured by feeding the voltage divided by the thermistor and R134 to the CPU via the analog port AN1.
  • Page 88 CONFIDENTIAL TM-U950/U950P Technical Manual S/J switching solenoid drive circuit The solenoid hold and off status is controlled by the SCB and S/J_HL signals. S/J_DR S/J_HL Operation Drive Hold Figure 2-53. S/J Switching Solenoid Drive Circuit Auxiliary slip paper feed solenoid/stamp solenoid drive circuit These solenoids are driven by transistors QM5 according the STB and SHB signals from the CPU.
  • Page 89 CONFIDENTIAL Paper feed motor drive circuit (journal) When transistor QM2 becomes on in response to the PFJ1 and PFJ2 switching signals from the CPU, the paper feed motor is activated. The PFJ_HL signal switches the motor between drive and hold. During hold, Q28 goes off and a current is supplied from the 5 V power supply. The same circuit is provided for the receipt side.
  • Page 90 CONFIDENTIAL TM-U950/U950P Technical Manual Auto-cutter drive circuit The auto-cutter drive circuit uses the dedicated DC motor drive IC TA8428K. The CPU issues the AC_1 and AC_2 signals to control off, normal, reverse, and braking operations of the auto- cutter motor.
  • Page 91 CONFIDENTIAL Figure 2-58. Carriage Motor Timing Chart Figure 2-59. Carriage Motor Drive Circuit 2-46 Mechanism Configuration and Operating Principles Rev. A...
  • Page 92 CONFIDENTIAL TM-U950/U950P Technical Manual Actuator irregular operation protection circui This circuit protects the printer from a current duration due to CPU abnormal operation. POW_TRG signal is connected to gate array PC5 and U8A is triggered by the signal. POW_TRG signal is a trigger for power supply control, and the signal is cut when CPU operates abnormally.
  • Page 93 CONFIDENTIAL Slip paper insert sensor circuit The slip paper insert sensor signal is output to CPU analog port via pull-down resistance and integral circuit. Slip paper existence is judged by comparison between the threshold value in U20 and the detected value. (For the threshold value, see Adjustment in Chapter 5.) Figure 2-61.

  • Page 94: Micr Board Operating Principle (On Printers With A Micr Reader) (Not Available For The Tm-U950P)

    CONFIDENTIAL TM-U950/U950P Technical Manual MICR Board Operating Principle (on printers with an MICR reader) (not available for the TM-U950P) Operating principle of the MICR reader “MICR” stands for “Magnetic Ink Character Recognition”. Magnetic ink is different from ink normally used for printing in that it contains magnetic particles such as iron filings which magnetize the ink.
  • Page 95 CONFIDENTIAL The voltage waveform output from the magnetic reading head produces a different pattern for each individual character, and characters are recognized by their patterns. Figure 2-65. Voltage Waveform Output From the Magnetic Reading Head Overview of MICR board operation The following drawing shows a simplified diagram of the functions of the MICR board.

  • Page 96: Chapter 3 Handling And Maintenance

    CONFIDENTIAL TM-U950/U950P Technical Manual Chapter 3 Handling and Maintenance Handling Handling Precautions Transport Precautions When transporting the printer, insert the protective material in the slip paper path and pack the printer in a specially provided package so that the printer does not come into contact with other products.

  • Page 97: Loading The Paper Rolls

    CONFIDENTIAL Ribbon Cassette Handling Precautions Use only the ribbon cassette specified in this manual. (See the Ink Ribbon section in Chapter If another ribbon cassette is used, the print quality may deteriorate, the life of the printer may be shortened, ink may leak, or the ribbon may be caught on a print head pin. Do not reink a ribbon.
  • Page 98 CONFIDENTIAL TM-U950/U950P Technical Manual 4. Insert the tip of the paper from each roll into the corresponding paper inlet. The paper will automatically be detected and fed into the printer. Figure 3-4. Inserting Paper into the Paper Inlet 5. Tear off the receipt paper on the paper cutter. If the paper was not fed far enough, press the RECEIPT FEED button to feed additional paper.

  • Page 99: Removing The Paper Rolls

    CONFIDENTIAL 8. Install the take-up spool in the printer and close the printer cover. Printer Cover Take-up Spool Figure 3-6. Installing the Spool and Closing the Printer Cover Removing the Paper Rolls 1. If you want to remove the paper roll in the journal paper side, cut the journal paper with a pair of scissors or a knife;...

  • Page 100: Inserting Slip Paper And Printing On Slip Paper

    CONFIDENTIAL TM-U950/U950P Technical Manual 2. Hold down the paper release lever (marked PRESS) and pull out the paper roll in the direction of the arrow. As there is a paper release lever on both the receipt and journal sides of the printer, you can remove either (or both) of the paper rolls in this way.

  • Page 101: Printing On Personal Checks (Only On Printers With A Micr Reader) (Not Available For The Tm-U950P)

    CONFIDENTIAL 2. When the SLIP indicator flashes, insert the slip paper into the slip paper inlet using the right side edge of the inlet. Make sure you insert the slip paper into the inlet as far as it will go (i.e. insert the slip paper until the mark on the left side of the printer.) See Figure 3-9.
  • Page 102 CONFIDENTIAL TM-U950/U950P Technical Manual Procedure for Inserting Personal Check Paper (a) Set the paper so that the side on which the magnetic ink characters have been printed is facing down, with the characters at the right side of the paper.

  • Page 103: Installing And Removing The Ribbon Cassette

    CONFIDENTIAL Notes: Personal check is ejected in the forward direction only. The paper roll must be loaded onto both the receipt and journal sides correctly before selecting MICR function by transmitting FS a 0. Otherwise, check paper is not fed properly. The check waiting state is canceled using DLE ENQ 3.

  • Page 104: Inserting The Stamp Set

    CONFIDENTIAL TM-U950/U950P Technical Manual Removing the Ribbon Cassette To remove the ribbon cassette, grasp the ribbon cassette’s tab and pull it out of the printer. Figure 3-12. Removing the Ribbon Cassette Inserting the Stamp Set If your printer has the stamping feature, follow the steps below to install the stamp set in the printer.

  • Page 105: Mounting The Power Switch Cover

    CONFIDENTIAL Mounting the Power Switch Cover To guard the power switch from incorrect operation, attach the power switch cover on the printer power switch as shown in Figure 3-14. Figure 3-14. Installing the Power Switch Cover Journal Lock Key Handling The journal lock is located inside the printer cover as shown in Figure 3-15.
  • Page 106 CONFIDENTIAL TM-U950/U950P Technical Manual 3. Cut the paper on the lines shown in the figure below, using a pair of scissors or a knife; then remove the paper roll. (See Figure 3-16.) Figure 3-16. Cutting the Paper 4. If the paper is caught in the cutter blade inside the auto-cutter, open the cutter blade by rotating the gear in the direction shown in the figure below.
  • Page 107 CONFIDENTIAL 5. Move the OPEN ↔ LOCK lever on each side of the printer in the direction in the figure below; then the cutter unit opens automatically. OPEN LOCK Figure 3-18. Opening the Cutter Unit 6. Pull the paper out gently. If the paper tears, make sure you remove any remaining pieces. 7.

  • Page 108: Maintenance

    CONFIDENTIAL TM-U950/U950P Technical Manual Maintenance For optimal printer performance over the longest possible period and to prevent problems, it is important to maintain the printer as described below. Periodic Checks The only user maintenance required on a regular basis is to follow the precautions described in Handling at the beginning of this chapter.

  • Page 109: Lubrication

    The lubricants for the printer are chosen based on technical information analysis and tests on various lubricants by EPSON. EPSON supplies EPSON specified lubricants in 40 cc (gr) plastic containers (the minimum supply unit). Two lubricants, G-15, G-19, G-20, G-36 andO-2, may be applied to the printer.
  • Page 110 CONFIDENTIAL TM-U950/U950P Technical Manual Lubrication schedule: When the printer is overhauled or after every 5 million print lines. Table 3-2. Lubrication Points for Printer Mechanism Unit (for printers without an MICR reader) Lubrication Point (See lubrication point diagrams at end of Chapter 6 (Appendix)
  • Page 111 CONFIDENTIAL Table 3-2. Lubrication Points for Printer Mechanism Unit (for printers without an MICR reader) Lubrication Point (See lubrication point diagrams at end of Chapter 6 (Appendix) Type Six shafts of frame-main assembly G-36 Roller-sub slip paper feed assembly mounting two U-cut notches of frame-main assembly G-15 Gear of roller-slip paper feed assembly G-36...

  • Page 112: Tool List

    CONFIDENTIAL TM-U950/U950P Technical Manual Table 3-3. Lubrication Points for Printer Mechanism Unit (for printers with an MICR reader) Lubrication Point (See lubrication point diagrams at end of Chapter 6 (Appendix) Type Four dowels of frame-inner G-15 Lever-sub slip paper feed shaft contact portion with roller-sub slip paper feed...

  • Page 113: Measuring Equipment List

    Lubricant List Table 3-6. Lubricants for the Printer Type Name Quantity Commercial Availability Grease G-15 40 gr Grease 40 gr Grease G-20 40 gr Grease G-36 40 gr 40 gr E : EPSON-exclusive product 3-18 Handling and Maintenance Rev. A...

  • Page 114: Chapter 4 Troubleshooting

    CONFIDENTIAL TM-U950/U950P Technical Manual Chapter 4 Troubleshooting Troubleshooting Use the following to troubleshoot and repair the printer: Self-test Use the self-test to check the operation of the control circuitry and the printer mechanism. Troubleshooting flowchart When the source of the problem is not clear, use the flowchart to find and replace a defective component.
  • Page 115 CONFIDENTIAL “Self-test printing. Please press RECEIPT FEED button.” The RECEIPT OUT and JOURNAL OUT LEDs flash alternately to indicate the standby condition. 2. Press the RECEIPT FEED button to continue self-test. Slip paper self test When the status information printing is complete, the slip paper is ejected, and the printer waits for insertion of the next sheet (SLIP LED flashes).
  • Page 116 CONFIDENTIAL TM-U950/U950P Technical Manual Ending the self-test (both paper roll and slip paper) The printer prints “***completed***” and ends the self-test. The printer automatically becomes ready to receive data after the self-test. Figure 4-1. Paper Roll Self-test Printing Example Rev. A...

  • Page 117: Troubleshooting Flowchart

    CONFIDENTIAL Troubleshooting Flowchart If the source of a problem is not clear, use the flowchart below to find and replace a defective component. Normally servicing should be performed by component replacement. Repairs of the PCBs and other components should be performed only by technicians. 4-4 Troubleshooting Rev.
  • Page 118 CONFIDENTIAL TM-U950/U950P Technical Manual Replace fuse F1 (see page 4-22) Rev. A Troubleshooting 4-5...
  • Page 119 CONFIDENTIAL 4-6 Troubleshooting Rev. A...
  • Page 120 CONFIDENTIAL TM-U950/U950P Technical Manual Take the steps described in Error Types and Countermeasures Rev. A Troubleshooting 4-7...
  • Page 121 CONFIDENTIAL 4-8 Troubleshooting Rev. A...
  • Page 122 CONFIDENTIAL TM-U950/U950P Technical Manual Data from host is not printed normally for the TM-U950 Rev. A Troubleshooting 4-9...
  • Page 123 CONFIDENTIAL Data from host is not printed normally for the TM-U950P Does interface cable match specification? Replace with a proper cable. Is interface cable broken? Replace the cable. Is interface circuit board connected to the main circuit board firmly? Connect the board firmly Replace the I/F circuit board Replace the printer mechanism assembly Check the host...
  • Page 124 CONFIDENTIAL TM-U950/U950P Technical Manual Rev. A Troubleshooting 4-11...

  • Page 125: Troubleshooting Tables

    CONFIDENTIAL Troubleshooting Tables If a problem that can be verified by visual examination has occurred, use the tables below to determine the cause and perform repairs. There are three tables, divided by symptom category: Table 4-1 Initialization Problems Table 4-2 Printing Quality Problems Table 4-3 Printer Mechanism Problems The tables contain the following columns: Problem...
  • Page 126 CONFIDENTIAL TM-U950/U950P Technical Manual Table 4-1. Initialization Problems Problem Probable Cause Level Checkpoint Action Printer does not operate Output voltage of Check 24 V input Replace regulator IC at all. external power supply voltage at CN4 and (U9). Replace external...
  • Page 127 CONFIDENTIAL Table 4-1. Initialization Problems (continued) Problem Probable Cause Level Checkpoint Action Motor-carriage does Carriage motor drive Check motor drive signal Repair motor drive signal not operate at all when signal failure at connector with an generator circuit. power is turned on and oscilloscope.
  • Page 128 CONFIDENTIAL TM-U950/U950P Technical Manual Table 4-2. Printing Quality Problems (continued) Problem Probable Cause Level Checkpoint Action Dots are dropped Print head FPC break Check FPC for Replace print head unit. irregularly. continuity. Print head operation Check wire tip for paper Clean wire tip.
  • Page 129 CONFIDENTIAL Table 4-3. Printer Mechanism Problems (continued) Problem Probable Level Checkpoint Action Paper roll feed pitch is Paper roll supplying Check whether paper Use paper roll that irregular. problem roll corresponds to corresponds to specifications. specifications. Check paper roll path Remove any obstacles for obstacles.
  • Page 130 CONFIDENTIAL TM-U950/U950P Technical Manual Table 4-3. Printer Mechanism Problems (continued) Problem Probable Level Checkpoint Action Line spacing irregular Slip paper problem Check whether slip Use slip paper that during use of slip paper, paper corresponds to corresponds to or printing is all on the specifications.
  • Page 131 CONFIDENTIAL Table 4-3. Printer Mechanism Problems (continued) Problem Probable Level Checkpoint Action Semi-auto loading is not Paper guide-assist Check paper guide- Remove any paper carried out. operation problem assist for paper deposits deposits or other or other contamination. contamination. Check deformation of Replace auxiliary paper auxiliary paper guide guide spring.
  • Page 132 CONFIDENTIAL TM-U950/U950P Technical Manual Table 4-3. Printer Mechanism Problems (continued) Problem Probable Level Checkpoint Action Ribbon feed Ribbon cassette and Check whether ribbon Insert ribbon cassette as mechanism does not ribbon gear are not cassette is inserted described in Chapter 3.
  • Page 133 CONFIDENTIAL Table 4-3. Printer Mechanism Problems (continued) Problem Probable Level Checkpoint Action Cutter blade operates Output signal failure Check output signals at Replace contact pin but full cut is not contact pin holder sub holder sub assembly and performed or becomes assembly with an cutter slider assembly if error.
  • Page 134 CONFIDENTIAL TM-U950/U950P Technical Manual Table 4-3. Printer Mechanism Problems (continued) Problem Probable Level Checkpoint Action Stamp does not Printer is in slip paper Turn power off and on Remove any pieces of operate. insertion standby again and check jammed paper.
  • Page 135 CONFIDENTIAL Table 4-4. MICR Malfunction Problem Probable Level Checkpoint Action None of the magnetic Carriage head Check to see if the Refer to related items printing can be read. malfunction carriage head stops at under the previous (The paper is processed the right end when the section on carriage as an error)

  • Page 136: Major Part Replacements

    CONFIDENTIAL TM-U950/U950P Technical Manual Major Part Replacements Fuse replacement Follow the steps below to replace a blown fuse: 1. Turn the printer off. 2. Disconnect the external power supply unit. 3. Perform Main Assembly 6 and 7 in Chapter 5 in reverse.

  • Page 137: Error Types And Countermeasures

    CONFIDENTIAL Error Types And Countermeasures Follow the flowcharts on the next page depending on the ERROR LED blinking pattern, and repair the printer. When an error occurs: The printer stops all operation The printer goes off-line The ERROR LED blinks Table 4-5.
  • Page 138 CONFIDENTIAL TM-U950/U950P Technical Manual Action 3 Action 1 Rev. A Troubleshooting 4-25...

  • Page 139: Small Part Specifications

    CONFIDENTIAL TM-U950/U950P Technical Manual Chapter 5 Disassembly, Assembly, and Adjustments Small Part Specifications This section uses abbreviations for small parts such as screws and washers. The following tables list these abbreviations as well as E-type retaining ring sizes. Actual Size E-type Retaining Rings...

  • Page 140: Disassembly

    CONFIDENTIAL Screw Types Head (top) Head (side) Body Washer (assembled) Disassembly This section describes disassembly procedures for replacing the following two parts: Print head unit Cutter blade For other disassembly procedures, see Printer Mechanism Assembly and Whole Unit Assembly in this chapter. The disassembly procedures are basically the reverse of the assembly steps described in these sections.

  • Page 141: Replacing The Print Head Unit

    CONFIDENTIAL TM-U950/U950P Technical Manual Replacing the Print Head Unit 1. Open the cover-main assembly. 2. Remove the cover-head assembly. 3. Remove the cover-carriage assembly. Cover-main assembly Cover-carriage assembly Cover-head assembly Rev. A Disassembly, Assembly, and Adjustments 5-3...
  • Page 142 CONFIDENTIAL 4. Remove the screw from the print head unit. 5. Disconnect the FPC from the connector on the board-head relay assembly. [Adjustment] After replacing the print head unit, adjust the print head and platen gap as described in Adjustment F in this chapter. Board-head relay assembly 5-4 Disassembly, Assembly, and Adjustments Rev.

  • Page 143: Replacing The Cutter Blade

    CONFIDENTIAL TM-U950/U950P Technical Manual Replacing the Cutter Blade 1. Open the cover-main assembly. 2. Remove the screws from the cover-cutter blade receiving assembly and replace the cover. [Adjustment] Make sure to perform the cutter blade play after the replacement. See Adjustment A in this chapter.

  • Page 144: Printer Mechanism Unit Assembly

    CONFIDENTIAL Printer Mechanism Unit Assembly The assembly process is divided into sub-assembly and main assembly. Perform the sub-assembly first to construct each unit from the parts. Then proceed to the main assembly. When assembling the printer, check each part and its attachment position by referring to the exploded diagrams in Chapter 6.

  • Page 145: Sub-Assembly A: Detector-Paper Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly Sub-assembly A: Detector-Paper Assembly 1. Attach the detector-paper J sub assembly and detector-paper R sub assembly to the holder- paper detector. 2. Dress the wires as shown in the illustration. Do not mix up the J and R paper detectors.

  • Page 146: Sub-Assembly B: Paper Guide-Upper Unit Assembly

    CONFIDENTIAL Sub-assembly B: Paper Guide-Upper Unit Assembly 1.* Attach both paper sensor levels to the paper guide-upper. 2. Fit hook of the detector-paper assembly into hole and move it in the direction to lock. 3. Dress the wires of the paper sensors as shown in the illustration. Detector paper assembly 5-8 Disassembly, Assembly, and Adjustments Rev.
  • Page 147 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly B 4. Push the roller-sub paper feed assembly into the groove on the paper guide-upper 5. Mount the nylon lock nuts on holder of the paper guide-upper. 6. Mount the crank shafts on the paper guide-upper, so that the U-shaped cutouts match 7.

  • Page 148: Sub-Assembly C: Paper Guide-Lower Unit Assembly

    CONFIDENTIAL Sub-assembly C: Paper Guide-Lower Unit Assembly 1. Pass the two guide rollers onto the shaft-guide roller and push the shaft into the paper guide-lower. 2.* Pass the sub paper hold rollers onto the paper hold springs. 3. Insert sides of the paper hold springs into the groove on the paper guide-lower and press the other end to fasten.
  • Page 149 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly C: (For printers with stamp function) 4.* Slide the lever-stamp into tabs on the paper guide-lower. 5. Align hole of the lever-stamp drive with the cutout on the iron core and secure the lever with the spring pin.

  • Page 150: Sub-Assembly D: Cutter Motor Mount Plate Assembly

    CONFIDENTIAL Sub-assembly D: Cutter Motor Mount Plate Assembly 1. Mount the cutter motor gear onto the cutter motor. 2.* Hold the motor with the label facing up and insert it into the cutter motor mount place sub- assembly. Turn it in the direction and secure it with the screws.

  • Page 151: Sub-Assembly F: Cutter Frame Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly F: Cutter Frame Assembly 1.* Fit the drive shaft holder of the cutter drive shaft sub-assembly into cutout 2.* Pass the drive shaft holder onto the cutter drive shaft sub-assembly and fit it into cutout Then attach the RE.

  • Page 152: Sub-Assembly H: Auto-Cutter Unit Assembly

    CONFIDENTIAL Sub-assembly H: Auto-cutter Unit Assembly 1.* Place the cutter slider assembly on the frame-cutter blade receiving assembly. 2.* Fasten the contact pin holder sub-assembly to the cutter frame assembly with the screw. 3. Align the dowel with the dowel hole and fasten the cutter motor mount plate assembly to the frame-cutter blade receiving assembly with the screws.
  • Page 153 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly H 8. Pass the roller-paper hold assembly shaft then shaft through holes and fasten the RE. 9. Attach the auxiliary paper guide springs. 10. Make sure that there is only one leaf of the cutter blade, and align the rectangular cutout on the cutter blade with the protruding section on the cutter slide assembly.
  • Page 154 CONFIDENTIAL Sub-assembly H 14. Solder lead wires O and P to the cutter motor terminals. 15. Slide the heat shrink tubes fully onto the terminals and shrink the tubes. 16. Pass the two tubes-protective onto the lead wires. 17. Solder lead wires Q, R, and S to the contact pin holder terminals. 18.

  • Page 155: Sub-Assembly I: Pulley Base-Carriage Transmission Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly I: Pulley Base-Carriage Transmission Assembly 1.* Mount the pully-carriage transmission to the pulley base-carriage transmission sub- assembly and fasten it with the RE. Checkpoint Make sure to mount the pulley-carriage transmission with the correct orientation.

  • Page 156: Sub-Assembly K: Assembling The Micr Head Holder Assembly (For Printers With A Micr Reader)

    CONFIDENTIAL Sub-assembly K: Assembling the MICR Head Holder Assembly (for printers with a MICR reader) 1. Pass the shaft through the MICR head holder, as shown below. Checkpoint Make sure the spring-head open and the shaft MICR head holder are facing the correct direction.
  • Page 157 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly K 3. Fit the two springs into the three locations shown below. 4. Pass the belt-MICR feed through the roller - MICR head holder. Checkpoint See the illustration below when lubricating the roller-MICR head holder. Be sure that the correct grease is used.
  • Page 158 CONFIDENTIAL Sub-assembly K 5. As shown in the illustration below, set one end of the spring-MICR head holder in the groove in the sleeve of the roller-MICR head holder. Checkpoint Be careful that the sleeve is facing the right direction 6.
  • Page 159 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly K 7. Fit the paper dust cover onto the shaft-MICR head holder. Checkpoint Fit the paper dust cover between the P.W. and the frame - MICR head holder, as shown below. Rev. A Disassembly, Assembly, and Adjustments 5-21...

  • Page 160: Sub-Assembly L-(1): Frame-Carriage Unit Assembly (For Printers Without A Micr Reader)

    CONFIDENTIAL Sub-assembly L-(1): Frame-Carriage Unit Assembly (for printers without a MICR reader) 1.* Attach the motor-carriage to the frame-carriage assembly with the screws. 2. Slide the board-head relay assembly into position along guides , and fasten it with the screw. Frame-carriage assembly Board-head relay assembly 3.* Mount the gears in the order...
  • Page 161 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly L-(1) 5. Align the U-shaped groove with dowel and mount the pulley base-carriage transmission assembly. Provisionally tighten the screw. (Final tightening is in carriage transmission belt tension adjustment on page 5-56.) 6.* Mount the lever-guide shaft support-J on the roller-slip paper hold assembly and fasten it with the RE.
  • Page 162 CONFIDENTIAL Sub-assembly L-(1) 13. Engage the belt-slip paper feed on the pulley-carriage transmission. Mount the print shaft holders and roller-sub slip paper hold assembly, and fasten with the RE. Roller-sub slip paper hold assembly 14. Pass the wires through the frame-carriage assembly, attach the detector-H.P. sub-assembly to the frame, and tighten the screw.
  • Page 163 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly L-(1) 15. Mount the detector-carriage sub-assembly so that it is flush with the round dowel and long dowel, as shown in the illustration. Then tighten the screw. Detector-carriage sub-assembly 16. Engage the FPC on the cable clasp. Mount the guide-nose onto the print head unit, and then attach them and tighten the screw.
  • Page 164 CONFIDENTIAL Sub-assembly L-(1) 18. Assemble all cables at section 19. Mount the paper guide-slip-upper on the frame-carriage assembly so that the three dowels match the respective dowel holes, and the hook is engaged in the catch. Then tighten the screw. Frame-carriage assembly 5-26 Disassembly, Assembly, and Adjustments Rev.

  • Page 165: Sub-Assembly L-(2): Frame Carriage Unit Assembly (For Printers With A Micr Reader)

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly L-(2): Frame-Carriage Unit Assembly (for printers with a MICR reader) 1.* As shown below, attach the lever-MICR head holder change to the frame-carriage assembly, and secure it with the RE fittings. Checkpoint Refer to the illustration below when lubricating the lever-MICR head holder change.
  • Page 166 CONFIDENTIAL Sub-assembly L-(2) 2. As shown below, attach the MICR head holder assembly to the frame-carriage assembly, and secure it with the two screws. Checkpoints Make sure the two dowels of the MICR head holder assembly are inserted in the two holes in the frame carriage assembly.
  • Page 167 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly L-(2) 4. Attach the motor-carriage to the frame-carriage assembly with the screws. 5. Slide the board-head relay assembly into position along guides , and fasten it with the screw. Frame-carriage assembly 6.* Mount the gears in the order in the illustration, and fasten them with the REs.
  • Page 168 CONFIDENTIAL Sub-assembly L-(2) 8. Align the U-shaped groove with dowel and mount the pulley base-carriage transmission assembly. Provisionally tighten the screw. (Final tightening is in carriage transmission belt tension adjustment on page 5-56.) 9. Attach the shaft holder-slip feed roller to the lever-guide shaft support. 10.*Pass the roller-slip hold assembly B through the belt-MICR feed, and fit the belt onto the gear.
  • Page 169 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly L-(2) Pulley base-carriage transmission assembly Carriage-head assembly Roller-slip paper hold assembly B Frame-carriage assembly Rev. A Disassembly, Assembly, and Adjustments 5-31...
  • Page 170 CONFIDENTIAL Sub-assembly L-(2) 20. Attach the tension-pulley to the lever-slip tension and fix it with the RE. 21. Attach the lever to the frame-carriage assembly and secure it with the screw. 22. Attach the pulley-slip tension to the frame-carriage assembly and secure it with the RE. 5-32 Disassembly, Assembly, and Adjustments Rev.
  • Page 171 CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly L-(2) 23. Engage the belt-slip paper feed on the pulley-carriage transmission. Mount the print shaft holders and roller-sub slip paper hold assembly, and fasten with the RE. Belt-slip paper feed Print shaft holder Pulley-carriage transmission...
  • Page 172 CONFIDENTIAL Sub-assembly L-(2) 26. Engage the FPC on the cable clasp. Mount the guide-nose onto the print head unit, and then attach them and tighten the screw. 27. Plug the FPC into the board-head relay assembly. Checkpoints Verify that the FPC is not deformed. Verify that the print head unit is in contact with the ground plate.

  • Page 173: Sub-Assembly M: Frame-Inner Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly M: Frame-Inner Assembly 1.* Pass the iron core through the lever-sub slip paper feed shaft and secure it with the spring pin. 2.* Position the resulting part so that is aligned with dowel 3.* Attach the form stopper to the frame-inner so that the cut face of section contacts tab 4.

  • Page 174: Sub-Assembly N: Detector-Slip Insertion Assembly

    CONFIDENTIAL Sub-assembly N: Detector-Slip Insertion Assembly 1. Push the detector-slip insertion sub assembly into the holder-slip insertion detector. Detector-slip insertion sub-assembly Sub-assembly O: Solenoid J/S Changeover Assembly 1.* Attach the J/S changeover solenoid to the J/S changeover solenoid mount plate and tighten the screw.

  • Page 175: Sub-Assembly P: Paper Guide-Slip-Lower Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly P: Paper Guide-Slip-Lower Assembly (If the printer has a MICR reader, assemble the paper guide-slip-lower assembly B.) 1. Insert the paper holder plate into the paper guide-slip-lower or lower-B so that the dowels match the five holes.

  • Page 176: Sub-Assembly Q: Frame-Paper Take-Up Assembly

    CONFIDENTIAL Sub-assembly Q: Frame-Paper Take-up Assembly 1.* Mount the paper take-up spring on the paper take-up gear. 2.* Attach the paper take-up pulley to the paper take-up gear. 3.* Attach the above assembly to the frame-paper take-up sub-assembly, and fasten it with the RE.

  • Page 177: Sub-Assembly R: Assembling The Motor-Paper Guide-J Assembly (For Printers With A Micr Reader)

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly R: Assembling the motor-paper guide-J assembly (for printers with a MICR reader) 1. With the leaf spring positioned as shown below, set the spring on the motor-paper guide-J, and then attach the shield plate-upper and the shield plate-lower.

  • Page 178: Main Assembly (Part 1)

    CONFIDENTIAL Main Assembly (Part 1) Main Assembly 1-1: Frame-Main Unit Assembly 1.* Mount the screw in hole 2. Attach the frame-inner assembly and secure it with the screw. 3. Mount the motor-paper feed-J (larger motor) and motor-paper feed-R and secure them with the screws.
  • Page 179 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 1-1-(2): Frame-Main Unit Assembly (for printers with a MICR reader) 1.* Mount the screw in hole 2. Attach the frame-inner assembly and secure it with the screw. 3. Attach the motor-paper feed-J assembly (the larger assembly) and R assembly (the smaller assembly), and secure them with the screws.
  • Page 180 CONFIDENTIAL Main Assembly 1-2: Attachment of Lower and Upper Paper Guide Unit 1. Slide the rectangular section of the paper guide-lower unit into the frame-main assembly and fasten the screw. 2. Align sections of the paper guide-upper unit with sections of the frame-main assembly and fasten the screws.
  • Page 181 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 1-3: Attachment of Paper Guide-Slip-Lower and Roller-Sub Slip Paper Feed Assembly 1. Mount the roller-sub slip paper feed assembly in the U-shaped grooves of the frame-main assembly. 2. Align the dowel and dowel hole of the paper guide-slip-lower assembly and engage...
  • Page 182 CONFIDENTIAL Main Assembly 1-4: Attachment of Solenoid-J/S Changeover and Various Gears 1.* Mount the paper feed deceleration gear and then the receipt transmission gear on the frame-main assembly and fasten with the RE. 2.* Align the tip of the lever-J/S changeover with the groove on the J/S changeover gear. Align the hole on the lever with the dowel on the frame-main assembly and secure the solenoid-J/S changeover assembly with the screw.
  • Page 183 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 1-5: Attachment of Auto-cutter Unit 1. Place the spring-cutter unit shaft-R onto the shaft of the auto-cutter unit with the short end first. 2. Place the spring-cutter unit shaft-J in the same way. 3. Thread the wiring from the contact pin holder sub-assembly through cutout to the outside.
  • Page 184 CONFIDENTIAL Main Assembly 1-6: Wiring, and Frame-Rear and Connector Assembly-N.E. Detector Mounting 1. Dress the wires as shown in the illustration. 2. Attach the frame-rear to the frame-main assembly and secure it with the screw. 3. Pass the connector assembly-N.E. detector-J through hole and then hole 4.
  • Page 185 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 1-7: Attachment of Frame-Carriage Unit 1. Pass the lead wires through hole 2. Mount the frame-carriage unit on the frame-main assembly and tighten the screws provisionally. (Final tightening is done in Adjustment C on the next page.) Frame-main assembly Rev.
  • Page 186 CONFIDENTIAL Main Assembly 1-8: Attachment of Frame-Front 1. Mount the frame-front on the frame-main assembly by sliding the frame-front from the direction of the arrow and tighten the screws. [Adjustments] See pages 5-55 through 5-57 for details of these adjustments. Slip paper guide adjustment (Adjustment C) Carriage transmission belt tension adjustment (Adjustment D) Slip paper feed parallelism adjustment (Adjustment E)
  • Page 187 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 1-9: Attachment of Frame-Paper Take-up Assembly 1. Mount the frame-paper take-up assembly on the frame-rear by fully aligning the frame to side J and tighten the screws. Frame-paper take-up assembly Rev. A Disassembly, Assembly, and Adjustments 5-49...
  • Page 188 CONFIDENTIAL Main Assembly 1-10: Attachment of Paper Take-up Belt and Paper Feed Deceleration Gear 1. Release the cutter unit lock levers of the auto-cutter unit and lift the unit in the direction. 2. Mount the paper feed deceleration gear and fasten it with the RE. 3.
  • Page 189 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 1-11: Attachment of Wiring Board Assembly 1. Attach the wiring board assembly to the rear of the printer mechanism assembly and secure it with the screw. Printer mechanism assembly (rear) Wiring board assembly Rev. A...
  • Page 190 CONFIDENTIAL Main Assembly 1-12-(1): Soldering of Lead Wires (for printers without a MICR reader) 1. Solder the wires as shown in the illustration. Main Assembly 1-12-(2): Soldering of Lead Wires (for printers with a MICR reader) 1. Solder the wires as shown in the illustration. 5-52 Disassembly, Assembly, and Adjustments Rev.

  • Page 191: Adjustments

    CONFIDENTIAL TM-U950/U950P Technical Manual Adjustments When servicing or repairing the printer and after replacing any parts, be sure to perform the following adjustments to assure correct operation. Adjustment A: Auto-cutter Blade Play 1. Move the cutter blade so that the short cutouts on the blade just disappear when seen from the hole on the cover-cutter blade receiving assembly.
  • Page 192 CONFIDENTIAL Adjustment B: Carriage Motor Gear and Carriage Feed Pulley Backlash 1. Loosen the fastening screw of the motor-carriage. 2. Move tab of the motor-carriage to adjust the backlash. 3. Tighten the fastening screw of the motor-carriage. Checkpoint Nominal value: b= 0.1 ± 0.05 mm (.0039 ± .0020”). 5-54 Disassembly, Assembly, and Adjustments Rev.
  • Page 193 CONFIDENTIAL TM-U950/U950P Technical Manual Adjustment C: Slip Paper Guide 1. Insert the slip paper path spacer between the upper and lower slip paper guides. 2. Push the frame-front in the direction and tighten the screws firmly. 3. Remove the spacer.
  • Page 194 CONFIDENTIAL Adjustment D: Carriage Transmission Belt Tension 1. Move the print head unit to the J side. 2. Loosen the fastening screw of the pulley base-carriage transmission assembly. 3. Apply a tension gauge to the pulley base-carriage transmission and adjust the tension while pulling the base horizontally.
  • Page 195 CONFIDENTIAL TM-U950/U950P Technical Manual Adjustment E: Slip Paper Feed Parallelism 1. Insert a piece of roll paper (45 to 55 Kg) 99 to 121 lbs) between the left and right slip paper feed rollers and slip paper hold rollers. 2. Pull out one of the piece of paper and check whether the paper feed amount is identical for each side.
  • Page 196 CONFIDENTIAL Adjustment F: Print Head Unit and Platen Gap 1. Move the print head unit to the two adjustment points (see the illustration below) and perform step 2 for each point. 2. Insert a clearance gauge between the print head unit and the platen, and adjust the gap to get the nominal value by turning the platen assembly fastening screw.

  • Page 197: Main Assembly (Part 2)

    CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly (Part 2) Main Assembly 2-1: Attaching lever stop plates-J and -R and adjusting their positions (for printers with a MICR reader) Always adjust the following items before carrying out the assembly: (See pages 5-53 - 58.) Check the auto cutter blade for looseness.
  • Page 198 CONFIDENTIAL Main Assembly 2-1: 2. With the dowel at the center, turn lever stop plates-J and -R in the direction of the arrow, until they come in contact with the lever-guide shaft supports-JB and -RB. 3. Secure the lever stop plates-J and -R with the screws so that they cannot move. Checkpoint Make sure the lever stop plates-J and -R are in tight contact with the lever-guide shaft supports, so that there is no gap between them.Do not press on the lever-guide shaft...
  • Page 199 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 2-2: Cover-Carriage Assembly and Cover-Head Assembly Mounting 1. Mount the cover-carriage assembly on the frame-main assembly and secure it with the screw. 2. Mount the cover-head assembly on the cover-carriage assembly and tighten the facing screw.
  • Page 200 CONFIDENTIAL Main Assembly 2-3: Attaching the MICR board (on printers with a MICR reader) 1. Attach the outside tooth washers and the H.L. fittings in the three locations shown in the illustration below. 2. Secure the MICR board with the three screws. 5-62 Disassembly, Assembly, and Adjustments Rev.
  • Page 201 CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 2-3: 3. Bend the cover-MICR board as shown in the illustration (if it is not already bent). 4. Fit the cutaway section of the cover-MICR board into the H.L. as shown in the illustration.
  • Page 202 CONFIDENTIAL Main Assembly 2-3: 5. Twist lead wires M2 and M4 eight times, and solder them to the MICR board. 6. Solder lead wires M1, M3, M5, and M6 to the MICR board. 7. Solder the three lead wires from the detector-carriage sub-assembly to the MICR board. 8.

  • Page 203: Whole Unit Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Whole Unit Assembly The assembly process is divided into sub-assembly and main assembly. Perform the sub-assembly first to construct each unit from the parts. Then proceed to the main assembly. When assembling the printer, check each part and its attachment position by referring to the exploded diagrams in Chapter 6.
  • Page 204 CONFIDENTIAL 3. Attach the microswitch to the holder-N.E. detection by positioning hole over hole then secure the switch with the screw. 4. Place a nut on each holder-N.E. detector. Checkpoints For N.E. detector-J assembly, make sure to attach the nut on the holder marked with and attach the microswitch so that the terminal faces mark For N.E.

  • Page 205: Sub-Assembly B: Holder-Switch Circuit Board Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly B: Holder-Switch Circuit Board Assembly 1. Attach the switch circuit board to the holder-switch circuit board so that the board comes under tabs , and secure the board with the screw. 2. Position the sensor plate by sliding it along the grooves of the holder-switch circuit board and by passing the cables below the plate.

  • Page 206: Sub-Assembly C: Journal Lock And Cover-Paper Take-Up Assembly (Option)

    CONFIDENTIAL Sub-assembly C: Journal Lock and Cover-Paper Take-up Assembly (Option) 1. Insert the plate of the cam lock into the hole of the holder. 2. Attach the plate spring to the indents of the cam lock to position it to the holder. 3.

  • Page 207: Sub-Assembly D: Cover Paper Take-Up

    CONFIDENTIAL TM-U950/U950P Technical Manual Sub-assembly D: Cover Paper Take-up 1. Attach the cover-paper take-up to the frame-paper take-up assembly on the printer mechanism assembly. Frame-paper take-up assembly Printer mechanism assembly Rev. A Disassembly, Assembly, and Adjustments 5-69...

  • Page 208: Main Assembly

    2. Attach the interface circuit board to the main circuit board (TM-U950P only). Checkpoint Make sure not to mistake the direction of the P-ROM. TM-U950 TM-U950P 3. Mount the main circuit board on the plate-main and secure it with four screws.

  • Page 209: Main Assembly 2: Ffc, Power Cable, And Plate-Circuit Board Attachment

    CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 2: FFC, Power Cable, and Plate-Circuit Board Attachment 1. Insert two FFCs into connectors CN3 and CN4, and then bend the FFCs as in the illustration. 2. Insert the power cable into connector CN1.

  • Page 210: Main Assembly 3: Printer Mechanism Assembly Attachment On Plate-Main

    CONFIDENTIAL Main Assembly 3: Printer Mechanism Assembly Attachment on Plate-Main 1. Turn over the assembled plate-main. 2. Gently place the printer mechanism assembly on the plate-main by aligning holes with dowels Checkpoints Position the three cables (marked in the illustration) so that they are aligned with the cutaway section .

  • Page 211: Main Assembly 4: N.e. Detector-R And -J Assemblies Attachment

    CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 4: N.E. Detector-R and -J Assemblies Attachment 1. Turn over the case-lower, remove any dust and dirt from the rubber foot mounting locations, and paste the feet in these locations. 2. Attach the cover-right and cover-left to the underside of the case, and secure it with screws.
  • Page 212 CONFIDENTIAL 3. Attach the roll paper rollers to the case-lower. 4. Attach the spacers-N.E. detector to the detector adjustment screws. 5. Attach the N.E. detector-R assembly and -J assembly to the case-lower by sliding section then secure them with the assembled detector adjustment screws. [Adjustment] Adjust the N.E.

  • Page 213: Main Assembly 5: Printer Mechanism Assembly Attachment On Case-Lower Assembly

    CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 5: Printer Mechanism Assembly Attachment on Case-Lower Assembly 1. Gently place the printer mechanism assembly on the case-lower assembly. 2. Attach the power switch to groove 3. Connect the connector assembly N.E. detector-J and -R from the printer mechanism assembly to the microswitches.

  • Page 214: Main Assembly 6: Case-Upper Assembly Mounting

    CONFIDENTIAL Main Assembly 6: Case-Upper Assembly Mounting 1. Connect the cable from the switch circuit board to the CN8 on the main circuit board unit. 2. Mount the case-upper assembly on the case-lower assembly by hooking the three tabs on the case-upper assembly to the three hooks on the case-lower;...

  • Page 215: Main Assembly 7: Cover-Face And Cover-Main Assembly Attachment

    CONFIDENTIAL TM-U950/U950P Technical Manual Main Assembly 7: Cover-Face and Cover-Main Assembly Attachment 1. Insert protrusion on the cover-face into the slot of the printer mechanism assembly; then secure the cover with the screw. 2. Attach the cover-main unit assembly to the printer mechanism assembly by aligning...

  • Page 216: Main Assembly 8: Cover-Rom Attachment

    CONFIDENTIAL Main Assembly 8: Cover-ROM Attachment 1. Secure the cover-ROM with the screw. Case-lower assembly 5-78 Disassembly, Assembly, and Adjustments Rev. A...

  • Page 217: Adjustments

    CONFIDENTIAL TM-U950/U950P Technical Manual Adjustments Adjustment G: Adjusting the Paper Roll Near-end Detector Location Adjust the remaining paper roll amount to be detected as the near end by following the instructions below, because the amount differs depending on the inner and outer diameter of the paper roll core.
  • Page 218 CONFIDENTIAL 3. Loosen the detector adjustment screws on both receipt and journal sides, and place the selected line of the N.E. detector-R and -J assembly so that the appropriate adjustment value is obtained. 4. After the adjustment, check that the lever-N.E. detector moves smoothly. 5-80 Disassembly, Assembly, and Adjustments Rev.

  • Page 219: Adjustment H: Detector-Slip Insertion Assembly Threshold Value Adjustment

    CONFIDENTIAL TM-U950/U950P Technical Manual Adjustment H: Detector-Slip Insertion Assembly Threshold Value Adjustment After replacing detector-slip insertion assembly, main circuit board, or printer mechanism assembly, be sure to perform the following adjustment to assure correct operation of the printer. Step Printer Operation...
  • Page 220 CONFIDENTIAL Step Printer Operation User Operation Is the measure value correct? Confirms if the measured detection value is correct, and prints message as follows depending on the result: When the value is correct: (6) The measured value is available. There might have been some mistakes of user operation.

  • Page 221: Adjustment I: Micr Mechanism Check

    CONFIDENTIAL TM-U950/U950P Technical Manual Adjustment I: MICR mechanism check Follow the procedure below to check the MICR mechanism. Make sure to install paper rolls before performing the check. For the checking, please use paper that meets specifications. Note: * marks may be printed after the measurement values. But ignore the marks and check according to each standard value.
  • Page 222 Go on to the next test if "?" are still printed after the cleaning. (*1) To clean the head holding roller, insert the roller cleaning sheet by EPSON into the printer. To clean the magnetic head, insert the magnetic head cleaning sheet into the printer.
  • Page 223 If P-P, mean, or σ value is over the standard value, MICR mechanism may be dirty. Clean(*1) the magnetic head and head holding roller. (*1) To clean the head holding roller, insert the roller cleaning sheet by EPSON to the printer. To clean the magnetic head, insert the magnetic head cleaning sheet to the printer.
  • Page 224 Please use the following sheets for the MICR test and cleaning. Seiko Epson card-M (code: 102590100). 152 mm 70 mm Seiko Epson roller cleaning sheet (code: 102590200). Remove the tape as shown before you use the sheet. Upper side 155 mm...

  • Page 225: Chapter 6 Appendix

    CONFIDENTIAL TM-U950/U950P Technical Manual Chapter 6 Appendix Electrical Circuit Drawings Main board Main circuit board contains circuit 1 to circuit 8 and main circuit which are shown in the following pages. Figure 6-1 indicates the main circuit board block diagram.

  • Page 226: Circuit 1

    CONFIDENTIAL Circuit 1 6-2 Appendix Rev. A...

  • Page 227: Circuit 2

    CONFIDENTIAL TM-U950/U950P Technical Manual Circuit 2 Rev. A Appendix 6-3...

  • Page 228: Circuit 3

    CONFIDENTIAL Circuit 3 6-4 Appendix Rev. A...

  • Page 229: Circuit 4

    CONFIDENTIAL TM-U950/U950P Technical Manual Circuit 4 Rev. A Appendix 6-5...

  • Page 230: Circuit 5

    CONFIDENTIAL Circuit 4 Circuit 5 6-6 Appendix Rev. A...

  • Page 231: Circuit 7

    CONFIDENTIAL TM-U950/U950P Technical Manual Circuit 6 Circuit 7 Rev. A Appendix 6-7...
  • Page 232 CONFIDENTIAL Circuit 8 6-8 Appendix Rev. A...

  • Page 233: Main Unit Circuit Drawing For Tm-U950

    TM-U950/U950P Technical Manual Main Unit Circuit Drawing for TM-U950 Appendix 6-9...

  • Page 234: Main Unit Circuit Drawing For Tm-U950P

    TM-U950/U950P Technical Manual Main Unit Circuit Drawing for TM-U950P Appendix 6-10...

  • Page 235: Micr Board (For Printers With A Micr Reader) (Not Available For The Tm-U950P)

    TM-U950/U950P Technical Manual MICR Board ( for printers with a MICR reader) (Not Available for the TM-U950P) Appendix 6-11...

  • Page 236: Parallel Interface Circuit Board Diagram

    TM-U950/U950P Technical Manual Parallel Interface Circuit Board Diagram Appendix 6-12...

  • Page 237: Main Circuit Board Parts Layout For Tm-U950

    TM-U950/U950P Technical Manual Main Circuit Board Parts Layout for TM-U950 Appendix 6-13...

  • Page 238: Main Circuit Board Parts Layout For Tm-U950P

    TM-U950/U950P Technical Manual Main Circuit Board Parts Layout for TM-U950P Appendix 6-14...

  • Page 239: Parallel Interace Circuit Board Parts Layout

    TM-U950/U950P Technical Manual Parallel Interface Circuit Board Parts Layout Appendix 6-15...

  • Page 240: Overall Exploded Diagrams

    TM-U950/U950P Technical Manual Overall Exploded Diagrams Printers Without a MICR Reader (1/4) (Both TM-U950 and TM-U950P) Appendix 6-16...
  • Page 241 TM-U950/U950P Technical Manual Printers Without a MICR Reader (2/4) Appendix 6-17...
  • Page 242 TM-U950/U950P Technical Manual Printers Without a MICR Reader (3/4) Appendix 6-18...
  • Page 243 TM-U950/U950P Technical Manual Printers Without a MICR Reader (4/4) *The current boards, H.L., and plate-main are different for the TM-U950P. (Please see the next page.) Appendix 6-19...
  • Page 244 TM-U950/U950P Technical Manual Printers Without a MICR Reader (4/4): TM-U950P Only Interface circuit board P-ROM Main circuit board CPS-tite (M3 x 6) Plate-main Note: These parts are different for the TM-U950P. All other parts are the same as the TM-U950. Appendix 6-20...
  • Page 245 TM-U950/U950P Technical Manual Printers With a MICR Reader (1/5) Appendix 6-21...
  • Page 246 TM-U950/U950P Technical Manual Printers With a MICR Reader (2/5) Appendix 6-22...
  • Page 247 TM-U950/U950P Technical Manual Printers With a MICR Reader (3/5) Appendix 6-23...
  • Page 248 TM-U950/U950P Technical Manual Printers With a MICR Reader (4/5) Appendix 6-24...
  • Page 249 TM-U950/U950P Technical Manual Printers With a MICR Reader (5/5) Appendix 6-25...

  • Page 250: Lubrication Points Diagram For Printers Without A Micr Reader (1/3)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers Without a MICR Reader (1/3) Appendix 6-26...

  • Page 251: Lubrication Points Diagram For Printers Without A Micr Reader (2/3)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers Without a MICR Reader (2/3) Appendix 6-27...

  • Page 252: Lubrication Points Diagram For Printers Without A Micr Reader (3/3)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers Without a MICR Reader (3/3) Appendix 6-28...

  • Page 253: Lubrication Points Diagram For Printers With A Micr Reader (1/4)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader (1/4) Appendix 6-29...

  • Page 254: Lubrication Points Diagram For Printers With A Micr Reader (2/4)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader (2/4) Appendix 6-30...

  • Page 255: Lubrication Points Diagram For Printers With A Micr Reader (3/4)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader (3/4) Appendix 6-31...

  • Page 256: Lubrication Points Diagram For Printers With A Micr Reader (4/4)

    TM-U950/U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader (4/4) Appendix 6-32...

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