Page 1: Service Manual
Confidential Service manual TM-U675/U675P (with autocutter) Issued Date Issued by English 401239103 Rev.D EPSON...
Page 3 Confidential TM-U675/U675P(with autocutter) Service Manual Revision Table Rev. Page Description Rev. A All pages Newly authorized Rev. B Changed the explanation for “Adjusting the Platen Gap.” Reason for change: Mistakes and missing information. Rev. C 2-118 Added the parts “Ferrite core“ .
Page 4 Confidential ii Revision Table...
Page 5 On the earlier of (a) termination of your relationship with Seiko Epson, or (b) Seiko Epson’s request, you must stop using the confidential information. You must then return or destroy the information, as directed by Seiko Epson.
Page 6: Table Of Contents
Assembling the TM-U675/U675P ........
Page 7: Table Of Contents
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix A Service Tools and Lubricants Appendix B Maintenance Maintenance and Inspection ..............B-1 Daily Inspection .
Page 8: Table Of Contents
TM-U675/U675P ........
Page 9 Confidential TM-U675/U675P (with autocutter) Service Manual For Safe Repair and Maintenance Work Key to Symbols The symbols in this manual are identified by their level of importance, as defined below. Read the following carefully before handling the product. WARNING: You must follow warnings carefully to avoid serious bodily injury.
Page 10 Confidential Always supply power directly from a standard domestic power outlet. Handle the power cord with care. Improper handling may lead to fire or shock. Do not modify or attempt to repair the cord. Do not place any object on top of the cord. Avoid excessive bending, twisting, and pulling.
Page 11 Confidential TM-U675/U675P (with autocutter) Service Manual CAUTION: Wear a grounded wrist band when handling the internal circuit boards to prevent damage from static electricity. When removing an internal circuit board, place it on an anti-static rubber sheet or similar surface to prevent damage from static electricity.
Page 12: About This Manual
Confidential About This Manual Aim of the Manual This manual was created to provide the information on printer maintenance and repair required by technicians who handle this work. Manual Content The manual is made up of the following sections: Describes troubleshooting procedures (specific Chapter 1 Troubleshooting problems and remedies) Chapter 2 Assembly and Disassembly...
Page 13: Before Servicing
Confidential TM-U675/U675P (with autocutter) Service Manual Chapter 1 Troubleshooting Before Servicing The beginning of this manual (pages vi to viii) provides precautions you should observe to perform work safely and the necessary information to service this product safely. Always read that information before starting your work.
Page 14 Confidential Table1-1 Symptoms and Checkpoint Symptom Checkpoints (by Priority) Ribbon won’t feed. 1. Replace the ribbon cassette. (See page I-8.) 2. Check sprocket and gears for paper particles. 3. Check the carriage motor and gears. (See page 1-11.) 4. Replace the main circuit board. (See page 2-96.) Unevenness occurs in the concentration of 1.
Page 15 Confidential TM-U675/U675P (with autocutter) Service Manual Table1-1 Symptoms and Checkpoint Symptom Checkpoints (by Priority) Drawer kick operation failure 1. Replace the main circuit board unit. (See page 2-96.) Display module display failure 1. Check that the unit is a serial model. (The display module will not work on parallel models.)
Page 16: Printer Mechanism Power On Checks
Confidential Printer Mechanism Power on Checks The printer mechanism runs through the following tests when you turn on the power supply to the printer. Opens and closes the platen. Detects carriage home position. Feeds roll paper to the printer. This section describes the items that you can check visually. Opening and Closing the Platen The printer opens and closes the platen once.
Page 17: Feeding Roll Paper
Confidential TM-U675/U675P (with autocutter) Service Manual Feeding Roll Paper Roll paper is fed 1 to 2 mm. You cannot see this if the roll paper is not inserted. check for paper feed Figure 1-3 Feeding roll paper Rev.D Troubleshooting 1-5...
Page 18: Starting And Stopping Self Tests
Confidential Starting and Stopping Self Tests Printing Tests Starting the Tests Roll paper self test: The printer starts printing on the roll paper when you turn on the power while holding down the receipt FEED button when all the covers are closed. After printing is completed, operate the autocutter to cut the receipt.
Page 19: Micr Reader Test (Only With Printers That Have A Micr Unit)
Confidential TM-U675/U675P (with autocutter) Service Manual MICR Reader Test (Only with Printers that Have a MICR Unit) 1. Load the roll paper in the printer. 2. Turn off the power supply to the printer. 3. Open the roll paper cover.
Page 20 Confidential <Example Printing> With CMC7 Font Check Paper =0000066 =123456789012^ 210987654321/ Data that was read ???????? ?????????????? ????????????? (lower line). 10. Verify that the check was read correctly. You can continue running the test by inserting more checks. 11. When you have finished the test, turn off the power supply to the printer. 1-8 Troubleshooting Rev.D...
Page 21: Troubleshooting Using The Error Led
Confidential TM-U675/U675P (with autocutter) Service Manual Troubleshooting Using the ERROR LED You can learn the cause of a failure by checking the ERROR LED code. The following table shows problems and solutions to repair the printer. Numbers in the "Solutions" column indicate the order to use to check the problem.
Page 22 Confidential Table1-2 Error causes and solutions Solutions Type of Error and ERROR LED Pattern Explanation (Listed in the order you should use to check printer) Roll paper cover open error The roll paper cover Close the roll paper cover (rear cover). (rear cover) was detected as open when printing.
Page 23: Test Points On The Printer Mechanism
Confidential TM-U675/U675P (with autocutter) Service Manual Test Points on the Printer Mechanism This section shows how to test the motor and the coils. Table1-3 Test points on the printer mechanism Name of Mechanism Part Name Internal Element Function Where to Check...
Page 24: Test Points On The Main Circuit Board Unit
Confidential Test Points on the Main Circuit Board Unit After a main circuit board unit failure, one basic method for diagnosing the cause of the problem on the main circuit board unit is to check the power supply line. Use the following table to check the power supply line.
Page 25 Confidential TM-U675/U675P (with autocutter) Service Manual Table1-4 Checking the power supply line Step Location of Condition of Normal Type of Voltage Measurement Measurement Value Presumed Cause of the Error 24 V ± 10 % Q17 could have malfunctioned. Mechanism Located near...
Page 26: Locations Of The Main Elements On The Main Circuit Board Unit
Confidential Locations of the Main Elements on the Main Circuit Board Unit The following shows the locations of the main elements on the main circuit board unit. Fuse (F1) CPU (U3) Gate array (U30) *under the memory board Fuse (F2) Carriage motor controller (U14) Slip paper feed motor...
Page 27: Procedures For Replacing The Print Head Unit
Confidential TM-U675/U675P (with autocutter) Service Manual Procedures for Replacing the Print Head Unit 1. Turn off the power switch to the printer. Remove the power supply unit from the printer. 2. Open the printer front cover and remove the ribbon cartridge.
Page 28 Confidential 4. Remove the two screws and remove the carriage cover frame assembly. screw screw Figure 1-8 Removing the carriage cover frame assembly When you are reattaching the frame, insert the tooth on the left side into the shaft and align the nib on the right side with the nib hole.
Page 29 Confidential TM-U675/U675P (with autocutter) Service Manual 5. Move the head carriage to the right side and remove the print head unit flexible plastic cable (FPC) from the connector. Figure 1-10 Removing the print head unit FPC 6. Remove the screw and remove the print head unit.
Page 30 Confidential 7. Remove the nose guide from the print head unit. nose guide Figure 1-13 Removing the nose guide 8. To reinstall the print head, reverse the procedures you used to remove it. When reinstalling, affix the head seal to the print head unit. print head unit head seal Figure 1-14...
Page 31: Removing Paper Jams
Confidential TM-U675/U675P (with autocutter) Service Manual Removing Paper Jams Paper Jams in the Autocutter Retract the autocutter movable blade using the following procedure. 1. Pull the latch levers on the right and left sides to the front and open the roll paper cover.
Page 32: Paper Jams In The Slip Paper
Confidential 4. Remove the paper. Close the clamshell mechanism. Push on the clamshell mechanism until you hear a clicking sound. 6. Close the roll paper cover. Paper Jams in the Slip Paper 1. Check that the power to the printer is turned ON. If it is not ON, turn it ON. 2.
Page 33: Detector Functions And Positions
Confidential TM-U675/U675P (with autocutter) Service Manual Detector Functions and Positions The following shows the positions and the functions of the detectors. Table1-5 Detectors and functions Mechanism Function Home position detection Initial setting of printer (carriage home position) mechanism Carriage detection mechanism Detection of head carriage malfunction B.O.F.
Page 34 Confidential 1-22 Troubleshooting Rev.D...
Page 35: Before Assembly And Disassembly
This chapter provides the procedures for assembling. Reverse them to disassemble the printer. Assembly is organized into “Assembling the Mechanism Assembly (M-U675),” and “Assembling the TM-U675.” Each section is further divided into “Pre-assembly” and “Assembly.” Do “Pre-assembly” steps first, and then do “Assembly” after you have assembled the parts into units to some degree.
Page 36: Assembling The Mechanism Assembly (M-U675)
Confidential Assembling the Mechanism Assembly (M-U675) Pre-assembly Procedures Pre-assembly of the Validation Detector Assembly 1. Solder lead wires S, T, R to the validation circuit board. 697 Validation detector assembly 757 Lead wire (type R) 758 Lead wire (type S) 759 Lead wire (type T) Figure 2-1 2-2 Assembly and Disassembly...
Page 37 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Slip B.O.F. Detector Assembly 1. Solder lead wires C, D, E to the slip B. O. F. detector assembly. 2. Insert the slip B. O. F. detector assembly into the slip insertion detector holder.
Page 38 Confidential Pre-assembly of the Lever Drive Coil Assembly 1. Attach lever drive coils (type A, B) to the lever coil mounting plate sub assembly. The rack for lever drive coil (type A, B) should face upward. Do not confuse type A and B. Type A uses brown lead wires.
Page 39 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Paper Feed Motor Note: Perform the following three steps only if your printer has a MICR unit. 1. Insert the paper feed motor into the motor shield case. Insert the paper feed motor gear into the hole in the motor shield case.
Page 40 Confidential Pre-assembly of the J/S Change Solenoid Assembly 1. Attach the J/S change solenoid to the J/S solenoid mounting plate. When doing so, tighten the screw while the J/S change solenoid is touching the nib on the right side of the J/S solenoid mounting plate.
Page 41 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Slip T. O. F. Detector Assembly 1. Solder lead wires I, J, K to the slip T. O. F. detector assembly. 703 Slip T.O.F. detector assembly 748 Lead wire (type I)
Page 42 Confidential Pre-assembly of the Lever Motor T. P. Detector Assembly 1. Solder lead wires F, G, H to the lever motor T. P. detector assembly. 704 Lever motor T.P. detector assembly 745 Lead wire (type F) 746 Lead wire (type G) 747 Lead wire (type H) Figure 2-7 2-8 Assembly and Disassembly...
Page 43 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the MICR Unit Note: Perform the following 16 steps only if your printer has a MICR unit. 1. Solder the MICR connector assembly lead wires to the MICR head. 2. Align the MICR frame and MICR head with the nib and attach with one screw.
Page 44 Confidential 3. Attach the MICR fixing sheet to the MICR fixing. Set the hole on the MICR fixing sheet over the MICR fixing nib and attach so that the MICR fixing sheet does not protrude from the MICR fixing. 4. Attach the MICR fixing to the MICR lever. The tabs on the MICR fixing should fit into the MICR grooves.
Page 45 Confidential TM-U675/U675P (with autocutter) Service Manual 6. Insert the two MICR lever guide shafts into the MICR frame, starting with the end with the smaller diameter. 7. Lubricate the areas where the MICR lever and the MICR frame are in contact (six places).
Page 46 Confidential 9. Fit the MICR solenoid into the MICR case. 10. Align and fit the MICR solenoid nib into the MICR frame assembly. 11. Position and attach the MICR lever fixing plate to the MICR lever nib. (Use two screws to attach.) Note: Tighten the screws while holding the MICR solenoid.
Page 47 Confidential TM-U675/U675P (with autocutter) Service Manual 12. Insert to attach the MICR roller shaft from the opposite direction of the MICR lever fixing plate. Attach with one E-ring. 13. Attach the MICR lever spring on the hooks. 14. Check that opening and closing the MICR head assembly has a clicking feel to it.
Page 48 Confidential Pre-assembly of the Carriage Frame Unit 1. Lubricate the carriage motor shaft. 2. Insert the carriage drive pulley into the carriage motor shaft. 3. Lubricate the inside of the carriage drive pulley. 4. Attach the belt drive cap to the carriage drive pulley and secure it with one E-ring. Place the belt drive cap with flat surface face up to install it.
Page 49 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Carriage Assembly 1. Insert the oil rings into the carriage assembly and lubricate. When doing so, insert the flat surface of the oil rings so that they are facing up and down.
Page 50 Confidential 3. Insert the carriage belt into the carriage assembly. Fit the belt along the grooves in the bottom side of the carriage assembly. For the direction of the belt, see the illustration below. Carriage belt Carriage assembly Figure 2-15 2-16 Assembly and Disassembly Rev.D...
Page 51 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the H. P. Detector Assembly 1. Solder lead wires L, M, N in that order to the H. P. detector assembly. 07 H.P. detector assembly 751 Lead wire (type L) 752 Lead wire (type M)
Page 52 Confidential Pre-assembly of the Carriage Frame 1. Lubricate five shafts on the carriage frame sub assembly. 2. Insert the ribbon feed spring into the shaft shown in the figure below. Set the ribbon feed spring claw upward and insert all the way by rotating the ribbon feed spring clockwise. 3.
Page 53 Confidential TM-U675/U675P (with autocutter) Service Manual 8. Insert the carriage drive transmission gear into the shaft shown in the figure below. 9. Insert the ribbon reduction gear into the shaft shown in the figure below. 10. Insert the ribbon intermediate gear into the shaft shown in the figure below. The smaller diameter ribbon intermediate gear should be on the lower side.
Page 54 Confidential 14. Insert the hole in the carriage motor onto the carriage frame sub assembly nib. Temporarily fasten the screw on the lead wire side. 15. Loosen the screw you temporarily tightened in the previous step (less than one turn). 16.
Page 55 Confidential TM-U675/U675P (with autocutter) Service Manual 17. Attach the carriage assembly to the carriage frame sub assembly. When doing so, set the carriage spring under the bent part on the carriage frame sub assembly as shown in the illustration. Insert the carriage guide shaft and secure it with one E-ring.
Page 56 Confidential 22. Align the intermediate circuit board assembly to the carriage frame sub assembly with two dowels, and attach the intermediate circuit board cover. 23. Tighten the intermediate circuit board assembly and intermediate circuit board cover together with two screws. 24.
Page 57 Confidential TM-U675/U675P (with autocutter) Service Manual 25. Pass the flexible plastic cable (FPC) for the print head unit (Eb) through the slit in the carriage assembly. When you do this, the FPC should be below the two hooks on the carriage assembly.
Page 58 Confidential 29. Solder four carriage motor cables and three H. P. detector assembly cables to the intermediate circuit board assembly. 30. Solder intermediate cables A, B, C to the intermediate circuit board assembly. 31. Cover intermediate cables A, B, C with the intermediate cable tube. Fold the intermediate Solder the carriage motor cables (four cables) to the intermediate cables A, B, C to the right side.
Page 59 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Front Cover Detector Assembly 1. Solder lead wires V, U, W in that order to the front cover detector assembly. 691 Front cover detector assembly 760 Lead wire (type U) 761 Lead wire (type V)
Page 60 Confidential Pre-assembly of the Rear Cover Detector Assembly 1. Solder lead wires X, Y, Z to the cover detector circuit board. 692 Rear cover detector assembly 763 Lead wire (type X) 764 Lead wire (type Y) 765 Lead wire (type Z) Figure 2-26 2-26 Assembly and Disassembly Rev.D...
Page 61 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Paper End Detector Assembly 1. Solder lead wires O, P, Q to the paper end detector circuit board. 710 Paper end detector assembly 754 Lead wire (type O) 755 Lead wire (type P)
Page 62 Confidential Pre-assembly of the Assist Paper Guide Assembly 1. Attach the backup paper guide cap to the center of the assist paper guide. 2. Attach the paper hold roller and assist paper guide spring to the assist paper guide. When doing so, attach the assist paper guide spring in the direction shown in the figure.
Page 63 Confidential TM-U675/U675P (with autocutter) Service Manual Paper feed frame assembly 1. Insert the paper guide lever and the sub paper hold roller into the paper feed frame assembly. 2. Pass the sub paper hold roller shaft into the paper feed frame assembly and sub paper hold roller.
Page 64 Confidential 4. Attach the sub paper feed roller assembly and the crank shaft holders to the paper feed frame assembly. 5. Lubricate the areas where the sub paper feed roller assembly and the crank shaft holder are in contact. 6. Attach the parallel pin and paper feed gear to the sub paper feed shaft with two E-rings. E-ring (4) G-48 Crank shaft...
Page 65 Confidential TM-U675/U675P (with autocutter) Service Manual 7. Hook the paper guide lever spring to the paper guide lever and paper feed frame. Insert the tip of the short side of the spring into the lever groove, and bend the spring to hook the tip of the long side on the inside in the gap in the frame.
Page 66 Confidential 8. Snap-fit the paper feed frame assembly to the paper end detector to attach. 710 Paper end detector assembly Figure 2-32 2-32 Assembly and Disassembly Rev.D...
Page 67 Confidential TM-U675/U675P (with autocutter) Service Manual 9. Attach the paper feed roller to the paper feed frame assembly. 10. Attach the crank shaft holder, parallel pin, and the paper feed gear to the paper feed roller with two E-rings. 11. Lubricate the sliding parts of the paper feed roller and crank shaft holder.
Page 68 Confidential 13. Attach the assist paper guide to the paper feed frame assembly using the paper feed roller springs. 14. Set the hooks for the paper feed roller springs into the grooves for the shaft and hang the loop of the spring onto the protrusion on the paper feed frame assembly. Be careful of the direction of the attachment of the spring.
Page 69 Confidential TM-U675/U675P (with autocutter) Service Manual 15. Insert the slip feed roller holder into the slip feed roller. 16. Attach the slip feed roller to the platen lever assembly with one E-ring. Insert the pin- shaped nib of the slip feed roller holder into the third hole from the left on the platen lever assembly.
Page 70 Confidential 19. Insert the nylon lock nut (M3) onto the platen lever assembly on the side where the platen ground plate (type A) is to be attached. The rounded side of the nylon lock nut (M3) should be facing the direction shown in the illustration. 20.
Page 71 Confidential TM-U675/U675P (with autocutter) Service Manual 25. Attach the platen lever assembly, platen ground plate B, and the platen lever spring to the paper feed frame assembly. Insert the platen lever spring onto the cross-shaped protrusion on the paper feed frame, and insert the other end onto the protrusion on the platen lever assembly.
Page 72 Confidential 27. Insert the lead wires for the paper end detector assembly in their specified positions. Figure 2-38 2-38 Assembly and Disassembly Rev.D...
Page 73 Confidential TM-U675/U675P (with autocutter) Service Manual 28. Attach the cover ground plate to the paper feed frame assembly. 29. Cover the paper feed frame assembly using the paper feed cover and tighten the two plate assembly lever screws. 30. Hang the assist paper guide spring onto the paper feed frame cover. Check the operation of the assist paper guide.
Page 74 Confidential 33. With one E-ring, attach the paper feed frame fixing L lever assembly and the paper feed frame fixing lever spring to the paper feed release assembly. Hang the spring onto the paper feed frame fixing L lever assembly and hang onto the protrusion on the paper feed frame so that it passes below the cover ground plate.
Page 75 Confidential TM-U675/U675P (with autocutter) Service Manual 35. Attach the parallel pin and paper feed gear to the paper feed roller with one E-ring. 648 Paper feed gear 722 E-ring (4) Parallel pin (1.6X10) Figure 2-41 Rev.D Assembly and Disassembly 2-41...
Page 76 Confidential Pre-assembly of the Carriage Cover Frame Assembly 1. Solder the paper ejection detector cable assembly (type B) to the paper ejection detector assembly. After soldering, pass the cables through the slit in the paper ejection detector assembly. Paper ejection detector assembly Slit Paper ejection detector cable (type B) assembly Figure 2-42...
Page 77 Confidential TM-U675/U675P (with autocutter) Service Manual 2. Attach the paper ejection detector assembly and the paper ejection detector holder. Then secure them with one screw. 3. Route the paper ejection detector cable assembly (type B) as shown in the illustration.
Page 78 Confidential 4. Hook the paper ejection detector cable assembly (type B) onto the hooks on the carriage cover frame assembly. Check the starting position for inserting the cable. 5. Attach the paper ejection detector assembly to the carriage cover frame assembly with one screw.
Page 79 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the Lever Drive Motor Assembly 1. Solder the lead wires A, B to the lever drive motor assembly. Solder lead wire (type A) (red) to the terminal on the side where the label is affixed.
Page 80 Confidential Pre-assembly of the Autocutter Assembly 1. Solder the cutter lead wire assembly to the cutter motor assembly. Solder the red lead wire to the red terminal and solder the black lead wire to the opposing terminal. 192 Cutter lead wire assembly 191 Cutter motor assembly Figure 2-46 2-46 Assembly and Disassembly...
Page 81 Confidential TM-U675/U675P (with autocutter) Service Manual 2. Apply G-36 oil to the cutter worm gear (part touching the frame). 3. Attach the cutter worm gear, autocutter deceleration gear, clutch washer, and cutter clutch spring to the cutter cover sub assembly. When doing so, the narrow side of the cutter clutch spring is the motor side.
Page 82 Confidential 5. Attach the cutter motor assembly to the cutter cover sub assembly (screw in 1 place). Attach in the direction from which you can see the label of the cutter motor assembly from the cutter cover sub assembly window. 6.
Page 83 Confidential TM-U675/U675P (with autocutter) Service Manual 8. Apply G-36 oil to the area of the autocutter deceleration gear and the motor gear that are touching. 9. Apply G-36 oil to the area of the cutter clutch spring and cutter cover sub assembly that are touching.
Page 84 Confidential 12. Apply G-36 oil to the axis that the cutter drive gear assembly fits. 13. Attach the cutter drive gear assembly (1 plain washer; 1 E-ring). Position the cavity in the cutter drive gear assembly with the actuator of the micro switch. 14.
Page 85 Confidential TM-U675/U675P (with autocutter) Service Manual 15. Apply G-36 oil around the entire circumference of the blade groove attached to the cutter frame sub unit. Groove G-15 Figure 2-51 Rev.D Assembly and Disassembly 2-51...
Page 86 Confidential 16. While positioning the two hooks, tilt and attach the cutter cover sub assembly to the cutter frame sub unit. 17. With the cutter cover sub assembly tilted, look inside the cover through the space shown below, and rotate the knob indicated in the figure to position the drive pin with the groove in the blade.
Page 87 Confidential TM-U675/U675P (with autocutter) Service Manual 18. Position the cutter cover sub assembly with the cutter frame sub unit and fasten with 1 screw. 178 Screw (C.B.S-tite F, 3X4) Figure 2-53 Rev.D Assembly and Disassembly 2-53...
Page 88 Confidential 19. Adjust the position of the blade. Rotate the knob in the direction of the arrow to position the shaft with the round hole (marked with a triangular hole) in the center of the arced slit. Rotate the knob in the arrow marked on the knob to adjust until center of the drive pin comes to the center of the slit.
Page 89: Assembly Of The Mechanism
Confidential TM-U675/U675P (with autocutter) Service Manual Assembly of the Mechanism 1. Tighten two screws on the front of the main frame. 2. Attach the lever drive motor assembly to the main frame with two screws. Install so that the label side of the lever drive assembly motor is facing the back.
Page 90 Confidential 3. Attach the sub slip feed roller holder to the farthest right hole in the sub slip feed lever sub assembly with one screw. 725 Screw (C.C.S-tite, 2.5X5) 660 Sub slip feed roller holder Sub slip feed lever sub assembly Figure 2-56 2-56 Assembly and Disassembly Rev.D...
Page 91 Confidential TM-U675/U675P (with autocutter) Service Manual 4. Attach the sub slip feed lever spring to the main frame. 5. Attach the sub slip feed lever sub assembly to the main frame. Insert the sub slip feed lever shaft from left side and fasten it with one E-ring.
Page 92 Confidential 6. Install the form stopper into the main frame, and attach the form stopper shaft with one E- ring. Insert the form stopper shaft from the outer side of the main frame. 7. Hook the form stopper spring to the main frame and form stopper rack. 620 Form stopper spring Form stopper 619 Form stopper shaft...
Page 93 Confidential TM-U675/U675P (with autocutter) Service Manual 8. Attach the lever drive shaft assembly to the main frame. Insert the D cut side of the lever drive shaft assembly to the left and attach to the main frame. 9. Insert the crank shaft holders from the left and right outer sides and attach with one E-ring.
Page 94 Confidential 10. Press the lever drive shaft gear into the lever drive shaft assembly. 11. Assemble the sub slip feed roller assembly into the main frame. 12. Press the slip drive gear onto the sub slip feed roller assembly. Press in starting from the slip drive gear whose diameter is larger.
Page 95 Confidential TM-U675/U675P (with autocutter) Service Manual 13. Snap fit the lever drive motor detector plate to the gear on the lever drive motor assembly. When doing so, align the rib on the gear and attach. 14. Lubricate the shaft to which the lever motor reduction gear is attached.
Page 96 Confidential 16. Lubricate the inside of the sub slip feed lever shaft in two places. 17. Lubricate the sub slip feed roller holder. 18. Lubricate the form stopper shaft rotating unit in two places. 19. Lubricate the main frame and sub slip feed roller where they contact. 20.
Page 97 Confidential TM-U675/U675P (with autocutter) Service Manual 22. Attach the validation detector assembly to the slip guide lower frame with one screw. Note: The parts used and the shape of the slip guide lower frame will vary based on the specifications. Use only the one that matches your configuration.
Page 98 Confidential 25. Attach the slip guide lower frame to the main frame using two screws. When doing so, pass the cable wire on the slip B.O.F. detector assembly through the hole in the main frame. 726 Screw (C.B.S-tite F, 3X6) Main frame Hole Figure 2-64...
Page 99 Confidential TM-U675/U675P (with autocutter) Service Manual 26. Insert the sub slip hold sleeve onto both ends of the shaft for the sub slip hold rollers. 27. Temporarily attach the front frame and the slip guide upper frame. When doing so, align the nibs shown in the illustration with the nib holes.
Page 100 Confidential 29. Attach the slip guide upper frame to the slip guide lower frame. When doing so, align the nibs and the claw shown in the illustration with the corresponding holes and slit. 661 Slip guide upper frame Claw Nibs Slip guide lower frame (type B) Nibs Figure 2-66...
Page 101 Confidential TM-U675/U675P (with autocutter) Service Manual 30. While aligning the three nibs shown in the illustration, attach the front reinforcement frame to the front frame and secure them with six screws. When doing so, make sure the nibs and claw you aligned in the previous step (step 29) are still aligned.
Page 102 Confidential 33. Insert the slip hold roller spring onto the slip hold roller shaft from the D cut side. 34. Insert the slip hold roller sleeve onto the slip hold roller shaft from the D cut side. 35. Insert the two slip feed roller shaft holders onto the slip hold roller shaft with the flange facing inward.
Page 103 Confidential TM-U675/U675P (with autocutter) Service Manual 36. Attach the slip hold roller shaft to the main frame in the order shown in the illustration. Align the D cut portions of the slip feed roller shaft holder with the cutouts in the main frame.
Page 104 Confidential 37. Attach the slip feed roller shaft holders to both sides of the sub slip hold roller starting from the small diameter. Secure the holders with two E-rings. 38. Push the slip drive gear into the slip hold roller shaft starting from the side whose diameter is larger.
Page 105 Confidential TM-U675/U675P (with autocutter) Service Manual 40. Insert three slip transmission gears onto the shafts on the main frame. 41. Insert the paper feed reduction gear onto the shaft on the main frame starting from the gear whose diameter is smaller.
Page 106 Confidential 42. Lubricate the shaft shown in the figure. 43. Inset the J/S change gear onto the shaft shown in the figure. 44. Insert the paper feed reduction gear into the shaft shown in the figure with the gear whose diameter is largest in.
Page 107 Confidential TM-U675/U675P (with autocutter) Service Manual 48. Attach the lever drive coil assembly to the slip guide lower frame with two screws. 609 Screw (C.B.P-tite, 3X6) 609 Screw (C.B.P-tite, 3X6) Lever drive coil assembly Figure 2-73 Rev.D Assembly and Disassembly 2-73...
Page 108 Confidential 49. Perform phase adjustment. (See page 3-2, "Phase Adjusting." ) Note: Perform the following step only if your printer has a MICR unit. 50. Attach the shielded paper feed motor to the main frame with two screws. Attach so that the motor cable is facing the direction shown in the illustration.
Page 109 Confidential TM-U675/U675P (with autocutter) Service Manual Note: Perform the following steps only if your printer does not have a MICR unit. 51. Attach the paper feed motor to the main frame with two screws. Check that the circuit board side of the motor is facing downward as shown in the illustration.
Page 110 Confidential 52. Align the J/S change solenoid with the nibs and attach to the main frame with one screw. 53. Lubricate the J/S change gear. 54. Attach the E-ring (2.3) to the J/S change gear shaft. G-36 721 E-ring (3) 727 J/S change solenoid 726 Screw (C.B.S-tite F, 3X6) Figure 2-76...
Page 111 Confidential TM-U675/U675P (with autocutter) Service Manual 55. Snap fit the slip T.O.F. detector assembly to the slip guide upper frame. 56. Pass the slip T. O. F. detector assembly lead wires through the two hooks and pass them through the hole in the main frame.
Page 112 Confidential 57. Align the two nibs and attach the lever motor T. P. detector assembly to the main frame with one screw. The detector assembly should not touch the lever drive motor detector plate. 614 Lever drive motor detector plate Lever motor T.P.
Page 113 Confidential TM-U675/U675P (with autocutter) Service Manual 58. Using two screws, attach the main circuit board assembly to the main frame. Place the board so the side of the main circuit board assembly with two connectors faces the front of the main frame, and the soldered side faces upward.
Page 114 Confidential 59. Solder the lead wires of the cables to the main circuit board assembly. Note: See Figure 2-93 on page 2-93 and Table 2-1 for details on where to solder. 60. Hook the lead wires on the side of the paper feed motor as shown in the illustration below. Figure 2-80 2-80 Assembly and Disassembly Rev.D...
Page 115 Confidential TM-U675/U675P (with autocutter) Service Manual Note: Perform the following step only if your printer has a MICR unit. 61. Attach the MICR unit to the slip guide lower frame with two screws. Pass the MICR unit cable through the hole in the main frame.
Page 116 Confidential Note: Perform the following step only if your printer does not have a MICR unit. 62. Attach the MICR plate shutter to the slip guide lower frame with one screw. MICR shutter Screw (C.B.P-tite, 3X8) Figure 2-82 2-82 Assembly and Disassembly Rev.D...
Page 117 Confidential TM-U675/U675P (with autocutter) Service Manual 63. Pass intermediate cables A, B, C through the hole in the main frame. Attach the carriage frame unit to the main frame with four screws. Fit the nibs in the carriage frame unit to the main frame notches.
Page 118 Confidential 64. Attach the paper feed frame stopper and belt plate to the main frame sub assembly. 65. Solder the intermediate cables (type A, B, and C) to the main circuit board assembly. Note: See Figure 2-93 on page 2-93 and Table 2-1 for details on where to solder. 66.
Page 119 Confidential TM-U675/U675P (with autocutter) Service Manual 68. Attach the rear cover detector assembly and the R cover detector cap to the main frame with one screw. 69. Solder the lead wires of the rear cover detector assembly to the main circuit board and route the wires.
Page 120 Confidential 70. Attach the drive lever coil cover to the slip guide lower frame. 671 Drive lever coil cover Figure 2-86 2-86 Assembly and Disassembly Rev.D...
Page 121 Confidential TM-U675/U675P (with autocutter) Service Manual 71. Insert the paper feed frame shaft into the platen unit. 72. Attach the platen unit to the main frame. Attach the platen unit as you widen both sides of the frame and fit the D shaped portions on both ends of the shaft into the D shaped cutting holes on the frame.
Page 122 Confidential 76. Fasten the ground wire assembly to the main frame with one screw. 208 Ground wire assembly Screw (C.P.S-tite(0), 3X6) Figure 2-88 2-88 Assembly and Disassembly Rev.D...
Page 123 Confidential TM-U675/U675P (with autocutter) Service Manual 77. Solder the lead wires of the paper end detector assembly to the main circuit board assembly. Note: See Figure 2-93 on page 2-93 and Table 2-1 for details on where to solder. 78. Lubricate the areas shown in the illustration.
Page 124 Confidential 79. Install the carriage cover on the main frame. Hook the carriage cover on the carriage guide shaft, and align the screw hole and one nib. Tighten the left side and right side screws in that order. Carriage cover 714 Screw (C.B.S-tite F, 3X4) Screw (C.B.S-tite F, 3X4) Figure 2-90...
Page 125 Confidential TM-U675/U675P (with autocutter) Service Manual 80. Connect the paper ejection detector cable assembly (type A) and the paper ejection detector cable assembly (type B). 81. Fasten the lead wires for the paper ejection detector cable assembly (type A) and the front cover detector using a nylon clip.
Page 126 Confidential Paper ejection detector cable (type B) assembly Nylon clip Screw (C.B.S-tite F, 3X6) Paper ejection detector cable (type A) assembly Figure 2-92 2-92 Assembly and Disassembly Rev.D...
Page 127 Confidential TM-U675/U675P (with autocutter) Service Manual Reference The following shows the areas to solder on the main circuit board assembly for M-U675. Paper ejection detector Slip T.O.F. detector assembly Validation detector assembly Front cover assembly detector assembly Rear cover detector assembly N.E.
Page 128: Assembling The Tm-U675/U675P
Confidential Assembling the TM-U675/U675P Pre-assembly Pre-assembly of the Insulator Spacer Assembly 1. Attach the insulator spacer to the rubber insulator spacer. 113 Rubber insulator spacer 114 Metallic insulator spacer Figure 2-94 Pre-assembly of the IF Circuit Board Assembly 1. Attach the RS-232 I/F circuit board assembly to the connector plate (type AA) and tighten the screws.
Page 129 Confidential TM-U675/U675P (with autocutter) Service Manual Pre-assembly of the N. E. Detector Assembly 1. Attach the hexagon lock screw to the N. E. detector holder. 2. Attach the N. E. detector lever to the N. E. detector holder. Check how the lever moves two to three times.
Page 130: Assembly Of The Tm-U675
Confidential Assembly of the TM-U675 1. Attach the main circuit board unit to the main plate sub assembly with six screws. Note: Components mounted on the main circuit board unit differ according to the configuration. Use the main circuit board that is appropriate for your configuration.
Page 131 Confidential TM-U675/U675P (with autocutter) Service Manual 3. Insert the two tabs on the mechanism assembly (M-U675) into the two slits in the strengthening plate. 4. Position the nibs and nib holes shown in the illustration and attach the two insulator spacer assemblies.
Page 132 Confidential 6. Connect the power switch cable assembly to the main circuit board unit. 7. Connect the control panel cable to the main circuit board unit. 8. Pass the N. E. detector assembly unit lead wire through the hole in the plate and connect to the main circuit board unit.
Page 133 Confidential TM-U675/U675P (with autocutter) Service Manual 10. Pass the power switch cable assembly between the L-shaped piece in the main plate sub assembly and the QM6 element on the main circuit board unit, as shown in the illustration. 11. Use insulated tape on the areas shown in the illustration to secure the power switch cable assembly temporarily.
Page 134 Confidential Note: Perform the following step only if your printer has a MICR unit. 13. Connect the MICR cables (two connectors). Put the excess cable into the opening as shown in the illustration. Figure 2-101 2-100 Assembly and Disassembly Rev.D...
Page 135 Confidential TM-U675/U675P (with autocutter) Service Manual 14. Fix the control panel circuit board assembly to the mechanism assembly (M-U675) with one screw. 15. Connect the control panel cable to the control panel circuit board assembly. Route the wiring so that the control panel cable is positioned under the L-shaped part shown in the illustration.
Page 136 Confidential 16. Attach the rubber feet to the lower case. 17. Attach the mechanism assembly (M-U675) to the lower case with four screws. Align the mechanism assembly (M-U675) with the lower case nibs. CAUTION: Be careful not to allow the power switch cable assembly to become pinched. 108 Screw (C.B.B-tite, 4X12) Screw (C.B.B-tite, 4X25) 108 Screw (C.B.B-tite, 4X12)
Page 137 Confidential TM-U675/U675P (with autocutter) Service Manual 18. Remove the tape that is temporarily holding the power switch cable assembly and attach the switch to the lower case. Assemble so that the “O” mark is on the left side and the “I” mark is on the right side.
Page 138 Confidential 19. Attach the roll paper receive roller to the roll paper holder. 20. Attach the N. E. detector assembly to the roll paper holder. 21. Fit the N. E. detector spacer onto the N. E. detector adjustment screw, and attach the N. E. detector assembly to the paper roll holder.
Page 139 Confidential TM-U675/U675P (with autocutter) Service Manual 23. Lubricate the hole in the axis of the take-up gear. 24. Insert the take-up spring into the take-up pulley while aligning the craw on the spring into the pulley. 25. Remove the take-up pulley and lubricate the take-up spring attached to the take-up gear.
Page 140 Confidential 27. Attach the break cap to the break plate sub assembly (one screw). 102 Screw (C.B.S-tite F, 3X4) 168 Break cap 174 Break plate sub assembly Figure 2-107 2-106 Assembly and Disassembly Rev.D...
Page 141 Confidential TM-U675/U675P (with autocutter) Service Manual 28. Attach the break plate sub assembly to the back frame (one E-ring). 164 E-ring (4) 167 Back frame Figure 2-108 Rev.D Assembly and Disassembly 2-107...
Page 142 Confidential 29. Attach the back frame to the lower case and tighten with 4 screws. While doing so, secure the ground wire assembly with the screw shown in the illustration. Screws (C.P.T-B, 3X10) Ground wire assembly Screws (C.P.T-B, 3X10) Screw (C.P.S-tite(0), 3X6) Figure 2-109 2-108 Assembly and Disassembly Rev.D...
Page 143 Confidential TM-U675/U675P (with autocutter) Service Manual 30. Connect the N. E. detector lead wire to the micro switch on the N. E. detector assembly. N.E. detector assembly lead wire Figure 2-110 Rev.D Assembly and Disassembly 2-109...
Page 144 Confidential 31. Attach the roll paper holder to the lower case. Touch the roll paper holder against the mechanism assembly and tighten the two screws while pushing to the back left side. 103 Screws (C.P.T-B, 3X10) 143 Roll paper holder Figure 2-111 2-110 Assembly and Disassembly Rev.D...
Page 145 Confidential TM-U675/U675P (with autocutter) Service Manual 32. Pass the take-up frame assembly through the hole in the back frame and attach it to the roll paper holder (two screws). At this time, place the take-up frame assembly against the main mechanism and rib on the roll paper holder.
Page 146 Confidential 33. Hang the paper take-up belt onto the take-up pulley. Then, hang to the take-up gear of the mechanism assembly. Place the lower side of the belt onto the belt plate. Hang the take-up pulley first. Then, hang on the take-up drive gear on the mechanism assembly (M-U675). 153 Paper take-up belt Figure 2-113 2-112 Assembly and Disassembly...
Page 147 Confidential TM-U675/U675P (with autocutter) Service Manual 34. Attach the corresponding cover plate sub assemblies to the left and right sides of the cover frame sub assembly (two screws). 35. Insert the coil unit of the right and left hook springs onto the shafts of the cover frame sub assembly and hang the hooks on the slits in the cover frame sub assembly.
Page 148 Confidential 36. Attach the autocutter unit to the cover frame sub assembly using two screws. 102 Screw (C.B.S-tite F, 3X4) 102 Screw (C.B.S-tite F, 3X4) Autocutter unit Figure 2-115 2-114 Assembly and Disassembly Rev.D...
Page 149 Confidential TM-U675/U675P (with autocutter) Service Manual 37. Pass the autocutter cable assembly through the hole in the back frame, and hang it on the hook shown below. Hook Hole in the back frame Figure 2-116 Rev.D Assembly and Disassembly 2-115...
Page 150 Confidential 38. Attach the cover frame sub assembly with two E-rings. Apply G-36 oil to the two places where the holes touch the shafts. G-36 E-ring (4) 175 Cover frame sub assembly G-36 E-ring (4) 167 Back frame Figure 2-117 2-116 Assembly and Disassembly Rev.D...
Page 151 Confidential TM-U675/U675P (with autocutter) Service Manual 39. Hook the break spring on the back frame and break plate sub assembly. 167 Back frame 171 Break spring Break plate sub assembly Figure 2-118 Rev.D Assembly and Disassembly 2-117...
Page 152 Confidential 40. Connect the autocutter cable assembly and the cutter lead wire assembly. 41. Insert the connector that you have just connected to the cutter plate cover, as indicated in the figure. Pass one side of the lead wire through the slit in the cutter plate cover. 42.
Page 153 Confidential TM-U675/U675P (with autocutter) Service Manual 43. Fit the support plate and the table holder into the lower case. 44. Apply G-48 oil to two shafts where the left hook button and right hook button hang. G-48 137 Support plate...
Page 154 Confidential 45. If you have a new upper case, there is a plate for support to prevent damage during shipment. Cut this plate in the manner shown in the illustration below. 46. Snap fit the back case to the upper case to attach. 129 Back case 128 Upper case Figure 2-121...
Page 155 Confidential TM-U675/U675P (with autocutter) Service Manual 47. Attach the upper case to the lower case. 128 Upper case 127 Lower case Figure 2-122 Rev.D Assembly and Disassembly 2-121...
Page 156 Confidential 48. Before aligning the tabs on the upper and lower cases, pass the cable wire for the paper ejection detector cable assembly (type A) through the slit in the upper case. Note Do not confuse with the cable wire for the paper ejection detector cable assembly (type B). 738 Paper ejection detector cable assembly (type B) Paper ejection detector cable assembly (type A)
Page 157 Confidential TM-U675/U675P (with autocutter) Service Manual 49. Align all tabs on the upper and lower cases. When doing so, do not allow the cable wire to become pinched between the cases. 50. Push the cable wire for the paper ejection detector cable assembly (type A) connector into the hole in the upper case.
Page 158 Confidential 51. Pass the flat cable for the control panel unit through the slit in the front case and attach the control panel unit to the front case. Snap fit the switch panel unit in the order indicated in the illustration. 134 Control panel unit Slit Front case...
Page 159 Confidential TM-U675/U675P (with autocutter) Service Manual 52. Attach the clamp to the front reinforcement frame. 53. Connect the control panel unit cable to the control panel circuit board assembly. 54. Attach the front case. Align with the hole in the front case and attach. When doing so, the flat cable for the control panel unit should be on top of the cable wire for the control panel cable.
Page 160 Confidential 56. Open the autocutter unit and place the take-up assembly above the main unit mechanism. Lubricate the sliding parts of the take-up assembly and the take-up frame assembly. 126 Take-up assembly G-36 G-36 Figure 2-127 2-126 Assembly and Disassembly Rev.D...
Page 161 Confidential TM-U675/U675P (with autocutter) Service Manual 57. Affix the operation label (type FA) to the roll paper cover. 58. Attach the roll paper cover. Hang the 4 claws on the back frame and set the 2 hinges into the holes in the back case.
Page 162 Confidential 59. Attach the front sound absorption material to the ribbon cassette cover. 60. Attach the ribbon cassette cover to the upper case. Align the hinges on the ribbon cassette cover with the nibs and attach. 131 Ribbon cassette cover Front sound absorption material Figure 2-129 2-128 Assembly and Disassembly...
Page 163 Confidential TM-U675/U675P (with autocutter) Service Manual 61. Attach the I/F circuit board unit to the main circuit board unit with two screws. Screws (C.P.S-tite(0), 3X6) I/F circuit board unit Figure 2-130 Rev.D Assembly and Disassembly 2-129...
Page 164 Confidential 62. Attach the lower plate and the IC cover to the main plate sub assembly with five screws. When doing so, check that the wiring of the power switch cable assembly is as shown in Figure 2-99. 106 Screws (C.B.S-tite F, 3X6) 136 Lower plate 111 IC cover Figure 2-131...
Page 165 Confidential TM-U675/U675P (with autocutter) Service Manual 63. Attach the three screws for fastening the display module (option). 106 Screws (C.B.S-tite F, 3X6) Figure 2-132 Rev.D Assembly and Disassembly 2-131...
Page 166 Confidential 64. Fasten the upper case and lower case by tightening the two screws. 103 Screws (C.P.T-B, 3X10) Figure 2-133 2-132 Assembly and Disassembly Rev.D...
Page 167 Confidential TM-U675/U675P (with autocutter) Service Manual 65. Affix a caution seal. 66. Affix an operation label (type BA). 67. Affix an operation label (type DA). 68. Affix a front seal. 69. Affix a head caution seal. 149 Operation label (type DA)
Page 168 Confidential 2-134 Assembly and Disassembly Rev.D...
Page 169: Before Adjusting And Setting
Confidential TM-U675/U675P (with autocutter) Service Manual Chapter 3 Adjusting and Setting Before Adjusting and Setting Always observe the following precautions when adjusting and setting. CAUTION: Always remove the power supply unit from the printer before working. There is power flowing in the internal circuit board even if you turn off the printer power supply switch.
Page 170: Phase Adjusting
Confidential Phase Adjusting Perform phase adjustments when you have removed or replaced any of the following. Items Requiring Phase Adjustment The lever drive gear. The lever drive transmission gear. The platen lever drive cam. 1. Press the tab of the lever drive coil (type B). Lever drive coil (type B) Claw when pushed Claw when raised...
Page 171 Confidential TM-U675/U675P (with autocutter) Service Manual 2. While pressing the tab of the lever drive coil (type B), rotate the lever motor reduction gear in the direction indicated in the illustration, so that the protrusion on the lever drive gear faces the very bottom of the printer.
Page 172 Confidential 4. Rotate the lever motor reduction gear. Continue until the lever drive gear no longer rotates. Lever motor reduction gear Lever drive gear Figure 3-4 3-4 Adjusting and Setting Rev.D...
Page 173 Confidential TM-U675/U675P (with autocutter) Service Manual 5. While the printer is in that state, attach the lever drive transmission gear to the lever drive transmission gear axis using one E-ring. Lever drive transmission gear E-ring Lever drive transmission gear Lever drive gear Figure 3-5 Rev.D...
Page 174 Confidential 6. Lubricate the platen lever drive cam shaft. Assemble the platen lever drive cam to the platen lever drive cam shaft using one E-ring. Set so that the three gear teeth of the platen lever drive cam are facing downward. G-36 Platen lever drive cam E-ring...
Page 175 Confidential TM-U675/U675P (with autocutter) Service Manual Platen lever drive cam Tab of the lever drive coil ( type B ) Lever drive gear Lever motor reduction gear Figure 3-7 Rev.D Adjusting and Setting 3-7...
Page 176: Adjusting The Platen Gap
Adjust the platen gap when you have performed either of the following: Platen Gap Adjustment Replaced or removed the print head unit. Disassembled or re-assembled the TM-U675/U675P printer. Use the following steps to adjust the platen gap. 1. Remove the carriage cover frame assembly. (See page 1-16.) 2.
Page 177 Confidential TM-U675/U675P (with autocutter) Service Manual 5. Using the thickness gauges, adjust the platen stopper screws so that the positions indicated ± below are 0.5 0.05 mm. Gauge Adjustment Screw Adjustment Screw 0.5 +/- 0.05 mm Print Head 20 mm 40 mm The stopper screws for the platen set are located here.
Page 178: Setting Threshold Values For Detectors
The paper ejection detector assembly. The validation detector assembly. The mechanism assembly. The main circuit board assembly (for TM-U675/U675P). CAUTION: Work indoors to avoid direct sunlight when doing the following. Use normal fluorescent lighting available in most rooms. You will not be able to make accurate adjustments if there is natural light (sunlight) or man-made light sources (lamps, etc.) other than...
Page 179 Confidential TM-U675/U675P (with autocutter) Service Manual Appendix A Service Tools and Lubricants Table A-1 Service tools required Tool Size Purpose Gap gauges <Thickness> To adjust the platen gap. 0.45 mm x 1 0.50 mm x 1 Crosshead screwdriver No. 0, 1 and 2...
Page 180 Confidential Appendix A-2 Service Tools and Lubricants Rev.D...
Page 181: Maintenance And Inspection
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix B Maintenance Maintenance and Inspection Perform maintenance and inspection to prevent trouble and maintain the fine, initial performance of this printer for a long time. There are two types of maintenance and inspection of this printer, based on the technical skill required: “Daily Inspection”...
Page 182: Periodic Inspection
Confidential Periodic Inspection Table B-2 Periodic inspection checklist Items to Check Checkpoints Handling When to Perform Status of paper dust, Is there a great deal of dirt, or dust Use a small vacuum cleaner for Twice a year dirt, dust adhering to adhering to the parts? computer equipment to clean the parts...
Page 183: Micr Cleaning
Confidential TM-U675/U675P (with autocutter) Service Manual MICR Cleaning It is recommended that you clean the MICR head periodically (generally once a year or every 72,000 passes) to maintain the accuracy of the MICR reading. Use a damp-type cleaning sheet to clean the MICR head.
Page 184 Confidential 7. The following message prints on the roll paper (receipt side) and the SLIP LED flashes. **** RECOGNITION MODE **** Please set check. 8. Insert the cleaning sheet into the printer in the same way as a check. CAUTION: Insert the cleaning sheet in the correct direction.
Page 185: Connecting To The Host Pc
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix C Installation You can connect up to four cables to the printer. They all connect to the connector panel (on the bottom rear of the printer), which is shown below. Figure C-1 Connector panel Note: This illustration shows the serial interface model.
Page 186: Connecting The Drawer
Confidential Note: Your printer has inch-type hexagonal lock screws installed. If your interface cable requires millimeter-type screws, replace the inch-type screws with the enclosed millimeter-type screws using a hex screwdriver (5 mm). millimeter screw inch screw Figure C-3 Inch screw and millimeter screw 3.
Page 187: Connecting To A Direct Connection Display Module
Confidential TM-U675/U675P (with autocutter) Service Manual Connecting to a Direct Connection Display Module WARNING: Be sure not to connect this cable to the drawer kick-out connector, which is next to the power connector. Also do not connect a telephone line to the display module connector.
Page 188: Power Connection
Power Connection Use the optional EPSON PS-170 power supply or equivalent for your printer. WARNING: Make sure you use the EPSON PS-170 power supply or equivalent. Using an incorrect power supply may cause fire or electrical shock. CAUTION: When connecting or disconnecting the power supply from the printer, make sure the power supply is not plugged into an electrical outlet.
Page 189: Component Functions
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix D Product Overview Component Functions Paper roll cover Control panel Front cover Figure D-1 Interface connector (*) Power supply DM connector Drawer kick-out connector connector (*) This illustration shows the serial interface model. The parallel interface connector looks slightly different.
Page 190: Outline Of Printer Mechanism
Confidential Outline of Printer Mechanism Printing Mechanism This mechanism consists of the print head unit, which has nine wires vertically arranged in one row, the head carriage assembly, platen, carriage motor, carriage drive pulley, carriage guide shaft, carriage transmission pulley, and carriage transmission belt. (See Figure D-4.) Platen Carriage guide shaft Print head unit...
Page 191 Confidential TM-U675/U675P (with autocutter) Service Manual Movement of print head unit When the carriage motor rotates the carriage motor gear in the direction shown by the white arrow, the driving force is transmitted sequentially to the carriage drive pulley and carriage transmission belt, moving the head carriage assembly, which is fixed to the carriage transmission belt, in the direction indicated by the white arrow.
Page 192 Confidential 3. When the electrical pulse to the drive coil ends, the dot wire and operation plate are returned to the standby status by the spring force of the wire return spring and operation plate spring. (See Figure D-6.) Paper Wire return spring Operating plate Dot wire...
Page 193 Confidential TM-U675/U675P (with autocutter) Service Manual Printing operation when printing one character This section explains the printing operation for a 9 9 dot matrix. Characters are printed by energizing the print solenoids at a timing corresponding to the head carriage movement position, using the carriage motor phase change signal as a reference signal.
Page 194 Confidential Platen open/close operation The platen adjustment screw attaches the platen to the platen lever. The platen opens and closes to prepare for feeding a slip, check, or validation sheet. When the lever coil is energized while the lever drive motor rotates, it releases the linkage of the lever ratchet wheel to the paper feed trigger attraction plate, and the lever drive gear rotates the prescribed amount in the direction shown by the arrow.
Page 195: Detection Mechanism Unit
Confidential TM-U675/U675P (with autocutter) Service Manual Detection Mechanism Unit The detection mechanism unit is comprised of the following mechanisms. Table D-1 Detection mechanism unit functions Mechanism Function Home position detection Initial setting of printer (carriage home mechanism position) Carriage detection...
Page 196 Confidential Home position detection mechanism The home position detection mechanism is located at the left end of the head carriage assembly. This mechanism keeps track of the head carriage assembly movement position. The initial setting is made by sensing the detection plate at the rear of the head carriage assembly. The home position detector consists of an LED and photo IC.
Page 197 Confidential TM-U675/U675P (with autocutter) Service Manual Screening plate Carriage drive transmission gear Carriage belt Carriage motor gear Carriage detector arriage drive pulley Carriage transmission pulley Figure D-12 Bottom of form (B.O.F.) detection mechanism The B.O.F. detection mechanism detects whether or not slip paper has been inserted, and detects the rear edge of the paper when printing is performed.
Page 198 Confidential The T.O.F. detector is comprised of an LED and phototransistor. Reflected light is used to determine whether or not a slip has been inserted. When a slip is inserted, light emitted by the LED is reflected, resulting in a change in the phototransistor output level.
Page 199 Confidential TM-U675/U675P (with autocutter) Service Manual Roll paper end detector mechanism The roll paper end detector mechanism detects the presence of roll paper. It is located behind the sub paper feed roller in the roll paper feed path so that it can detect the insertion of paper when semi-automatically loading roll paper.
Page 200 Confidential Roll paper near end detector mechanism The roll paper near end detector mechanism is made up of the N.E. detector lever and a microswitch. It is attached to the right side of the paper feed unit, and it detects the amount of roll paper remaining.
Page 201 Confidential TM-U675/U675P (with autocutter) Service Manual Lever motor timing pulse (T.P.) detection mechanism The lever motor T.P. detection mechanism consists of a lever drive motor detector plate and lever motor T.P. detector on the lever drive motor gear. It detects lever drive motor rotation and generates the signal, which determines the timing for energizing of the lever coil, which in turn controls opening/closing of the platen lever and opening/closing of the sub slip feed roller.
Page 202 Confidential Front cover open detection mechanism The front cover open detector is located at the right side of the printer mechanism, and detects opening and closing of the front cover. This detector consists of an LED and phototransistor. A screening part, located on the rear of the cover, interrupts light rays when the cover is closed. When the cover is opened, the light rays reach the phototransistor, resulting in a change in its output level.
Page 203: Roll Paper Feed Mechanism
Confidential TM-U675/U675P (with autocutter) Service Manual Roll Paper Feed Mechanism This mechanism mainly includes the paper feed motor, J/S change assembly, roll paper feed gears, and the paper feed unit. Paper feeds are performed by switching the power from the paper feed motor between the roll paper feed and slip paper feed by the J/S change assembly.
Page 204 Confidential autoloading. The semi-autoloaded paper roll passes through the paper path past the platen lever, and then passes to the front side of the platen to be guided to the auxiliary paper guide. It is guided outside the paper feed unit after passing the area where the paper feed roller and paper pressing roller are pressed together.
Page 205 Confidential TM-U675/U675P (with autocutter) Service Manual Roll paper Paper end detector Sub paper feed shaft Protrusions Sub paper feed roller Paper hold roller Guide roller aper hold roller shaft Paper guide roller Paper feed frame Assist paper guide Paper feed roller shaft...
Page 206 Confidential The paper feed rollers and paper hold rollers and the sub paper feed rollers and sub paper hold rollers are pressed together. They feed the roll paper that has been fed by the roll paper insert operation. (See Figure D-26.) The paper feed roller feeds paper the prescribed amount, but the sub paper feed roller is set to a paper feed amount that is slightly less than that amount.
Page 207 Confidential TM-U675/U675P (with autocutter) Service Manual Roll Paper Take-Up Mechanism This mechanism consists of a take-up frame, take-up drive gear, take-up belt, take-up gear, take- up pulley, take-up clutch, and take-up shaft, all of which ensure stable take-up operation. (See Figure D-28.)
Page 208 Confidential Take-up operation The take-up drive force for the printed roll paper is supplied by the paper feed motor, and is sequentially transmitted to the take-up shaft by the paper feed transmission gear, J/S change gear, paper feed reduction gear, take-up drive gear, take-up belt, take-up pulley, take-up clutch, and take-up gear.
Page 209 Confidential TM-U675/U675P (with autocutter) Service Manual Clamshell mechanism The clamshell mechanism consists of a paper feed unit, paper feed frame shaft, and paper feed frame fixing lever. This mechanism is used in the event of a quality problem, such as a paper jam.
Page 210 Confidential Paper feed unit Paper feed frame shaft Main frame Figure D-31 Closing mechanism 1. When a paper jam or other problem has been fixed, rotate the entire paper feed unit in the opposite direction from when the mechanism was opened. 2.
Page 211 Confidential TM-U675/U675P (with autocutter) Service Manual Roll paper release operation The roll paper release operation lets you remove pieces of roll paper that still remain when you are replacing roll paper. You can use this when there are paper jams or when you are removing pieces of paper.
Page 212 Confidential Specifically, the release lever is provided by the paper feed motor and very near the paper hold roller shaft to remove paper that interferes with the contact between the paper hold roller and paper feed roller. When you push the part of the release lever labeled “PUSH” in the direction indicated by arrow b, the release lever rotates around the pivot in the direction of arrow c, and the end of the release lever pushes out the end of the paper hold roller shaft in the direction indicated by arrow a.
Page 213: Slip Feed Mechanism
Confidential TM-U675/U675P (with autocutter) Service Manual Slip Feed Mechanism The slip feed mechanism is comprised of the following parts: Form stopper Sub slip feed lever Sub slip feed roller Sub slip hold roller Slip feed roller Slip hold roller Paper feed motor and wheel...
Page 214 Confidential Paper feed reduction gear J/S change gear J/S change lever J/S change solenoid Main frame Paper feed reduction gear Figure D-35 Appendix D-26 Product Overview Rev.D...
Page 215 Confidential TM-U675/U675P (with autocutter) Service Manual When the T.O.F. detector and B.O.F. detector determine that a slip has been inserted, the lever drive coil is energized while the lever drive motor is rotated. At this time, the linkage between the paper feed trigger attraction plate and lever drive ratchet wheel is disconnected, the lever drive shaft and lever drive cam rotate, and the sub slip feed lever moves in the direction indicated by arrow a.
Page 216 Confidential Slip drive gears Paper feed reduction gear Paper feed transmission J/S change gear gear Slip transmission gears Paper feed motor J/S change lever Paper feed motor gear Slip drive gears J/S change solenoid Figure D-37 Slip paper printing and paper feed operation After the slip is positioned, printing can be performed.
Page 217: Validation Mechanism
Confidential TM-U675/U675P (with autocutter) Service Manual When the slip paper is fed forward, the respective gears rotate in the directions indicated by arrow a, arrow b, arrow c, arrow d, arrow e, and arrow f. This rotates the slip feed roller and slip hold roller in the directions indicated by arrows g and h, feeding the slip paper in the direction indicated by the arrow.
Page 218 Confidential This ribbon feed mechanism only feeds the ribbon when the head carriage assembly is moved from the right side to the left side. Ribbon reduction gear Transmission gear Carriage transmission pulley Ribbon take-up shaft Head carriage set Ribbon take-up gear Ribbon drive gear Ribbon intermediate gear Figure D-38...
Page 219: Micr Mechanism (Factory Option)
Confidential TM-U675/U675P (with autocutter) Service Manual The ribbon take-up gear has an internal one-way clutch, preventing it from rotating in the direction indicated by arrow G and this, in turn, prevents ribbon slack. (See Figure D-39.) Ribbon take-up shaft Transmission gear...
Page 220 Confidential MICR character reading, and printing on front When using the MICR process, the force of the drive of the paper feed motor switches to the slip paper feed gear using the J/S change mechanism. A check is inserted just like any other slip. When a check is inserted along the right edge of the slip guide lower frame in the direction indicated by the arrow in the figure below, it is fed up to the form stopper and positioned.
Page 221 Confidential TM-U675/U675P (with autocutter) Service Manual Note 1 Insert the check again if the MICR characters cannot be recognized the first time. Note 2 When endorsement printing and printing on the front of the check are not performed, the check is fed forward and ejected upon completion of the MICR reading process.
Page 222: Cutter Mechanism
Confidential Cutter Mechanism This is an autocutting mechanism that cuts the roll paper with the driving force of the motor and has an emergency cutter to cut roll paper manually. Autocutter Mechanism The basic idea of the autocutter mechanism on this printer is the “scissors principle” to cut paper at the intersection of two blades.
Page 223: Drive Mechanism
Confidential TM-U675/U675P (with autocutter) Service Manual Drive Mechanism The cutter motor is fastened to the cutter cover. The cutter motor gear is pressed into the motor axis. The cutter motor is a DC brush motor. The cutter drive gear is rotatably supported on the cutter drive gear shaft that is attached to the cutter cover.
Page 224: Cutter Blade Mechanism
Confidential Cutter Blade Mechanism The following parts are established on the movable cutter blade shaft that is that is attached to the cutter frame. Stationary blade Scissors blade spacer Scissors blade Movable blade pressure spring Movable blade spring washer An oblong hole is designed to abut the movable blade drive shaft that is fastened to the cutter drive gear on the scissors blade.
Page 225: Cutter Blade Knobs
Confidential TM-U675/U675P (with autocutter) Service Manual 4. The movable blades (scissors blade and sliding blade) intersect at the stationary blade thereby cutting the roll paper from both edges. 5. The area between the scissors blade and the sliding blade remains uncut and the movable blades (scissors blade and sliding blade) retract.
Page 226: Emergency Cutter
Confidential Emergency Cutter There are cases in which the autocutter mechanism will not operate normally, if trouble occurs. In such cases, you can manually cut roll paper using the emergency cutter. The emergency cutter is mounted on the cutter cover. Roll paper Emergency cutter Movable blades...
Page 227: Outline Of Circuits
Confidential TM-U675/U675P (with autocutter) Service Manual Outline of Circuits Connection of Units This printer consists of the following main units: Impact head Impact mechanism drive unit MICR head unit (factory option) Main circuit board unit Memory circuit board unit Power...
Page 228: Circuit Block Diagram
Confidential Circuit Block Diagram In the circuit block diagram below, the circuit units in this printer are divided into main units. Power CN18 Power supply supply unit Power supply 24VB Impact head, Power supply MICR head voltage supply, autocutter 24VC Slip transport/ Power supply carriage motor...
Page 229: Memory Circuit Board
Confidential TM-U675/U675P (with autocutter) Service Manual Memory Circuit Board An outline of the memory board configuration and specifications is provided below. Program ROM (flash memory, U508) Table D-2 Program ROM specifications Item Specification Application Mainly for storage of programs Capacity Standard: 4 Mbit 8 Mbits may be used, depending on specifications.
Page 230: Main Circuit Board Unit
Confidential Memory Map 000000H CPU I/O 0003FFH 000400H RAM (INT) 000BFFH 000C00H RAM (EXT) CS1=0 1FFFFFH 400000H Gate Array CS0=0 4000FFH 800000H Font ROM 4M or 8M CS3=0 8FFFFFH F00000H Program ROM 4M or 8M CS2=0 FFFFFFH Figure D-48 Main Circuit Board Unit The main circuit board consists of the following elements: CPU peripheral circuit •...
Page 231 Confidential TM-U675/U675P (with autocutter) Service Manual • Lever function drive circuit (for paper feed path changeover) • MICR signal detection circuits (factory option) • Detection circuits • Autocutter drive circuit Input circuit • Logic power circuit DIP switch read circuit...
Page 232: Cpu And Peripheral Logic Circuits
Confidential CPU and Peripheral Logic Circuits Table D-6 CPU specifications Item Specification External Data Bus Width 16 bits Internal Data Bus Width 32 bits External Clock 9.83 MHz (root oscillation) Bus Speed 19.66 MHz Product Number TMP94C251F (Toshiba) Internal RAM 256 bytes (used as stack area) A/D Input Ports Four slip sensors (TOF detector, BOF detector, ejection detector, validation...
Page 233 Confidential TM-U675/U675P (with autocutter) Service Manual Table D-7 CPU terminals and functions Port (Terminal) Description Circuit Signal I/O Definition Name Name EP_TP EP_TP E/P timing pulse interrupt SW_SLIP_PF SW_SLIP None Depressed SW_RECEIPT_PF SW_RPT None Depressed Receive DMA request receipt DREQ...
Page 234 Confidential Table D-7 CPU terminals and functions Port (Terminal) Description Circuit Signal I/O Definition Name Name PB2/HLCAS1 LED_PAPER LED_PAPER PB3/HUCAS1 SEN_PWR SEN_PWR Power off Power on (sensor power On/Off) PB4/WE1 PTLED_COM PTLED_COM Power on Power off PA0/CAS0 MICR plunger (+) MICR_SOL1 PA1/UCAS0 MICR plunger (-)
Page 235 Confidential TM-U675/U675P (with autocutter) Service Manual Table D-7 CPU terminals and functions Port (Terminal) Description Circuit Signal I/O Definition Name Name  P10/D8 External data bus  P11/D9 External data bus  P12/D10 External data bus  P13/D11 External data bus ...
Page 236 Confidential Table D-7 CPU terminals and functions Port (Terminal) Description Circuit Signal I/O Definition Name Name  P41/A01 External address bus  P40/A00 External address bus DVCC DSW1-1 DSW1-1 DSW1-2 DSW1-2 DSW1-3 DSW1-3 DSW1-4 DSW1-4 DSW1-5 DSW1-5 DSW1-6 DSW1-6 EJ memory WP signal EJ_WP Power source LED LED_POWER...
Page 237 Confidential TM-U675/U675P (with autocutter) Service Manual Gate Array (GA) The GA for this printer mainly consists of a custom IC with the following functions. The GA is operated by external root oscillation (10 MHz). Impact head drive function General-purpose port and other functions...
Page 238 Confidential Table D-8 GA terminals and functions Terminal Circuit Signal Meaning Meaning Name Description Name Spec. of H of L SW24V2 24V enabler 2 24VSW2 supplied interrupted PB7/HEAD9 Impact/shuttle head 9 SHEAD9 Blocked Driven VDD2 Fixed power source PA7/HEAD8 Impact/shuttle head 1 SHEAD1 Blocked Driven...
Page 239 Confidential TM-U675/U675P (with autocutter) Service Manual Table D-8 GA terminals and functions Terminal Circuit Signal Meaning Meaning Name Description Name Spec. of H of L PI0/ DSW2-4 DSW2-4 DSW-OFF DSW-ON AC motor 1 AC_M1 AC motor 2 AC_M2 VDD4 Fixed power source...
Page 240 Confidential Table D-8 GA terminals and functions Terminal Circuit Signal Meaning Meaning Name Description Name Spec. of H of L GACS GA CS CS_GA selected selected PH5/STB1 Thermal head strobe-1 TH_STB1 Block 1 selected selected PH4/STB2 Thermal head strobe-2 TH_STB2 Block 2 selected selected...
Page 241 Confidential TM-U675/U675P (with autocutter) Service Manual Reset Circuit Stable operation of the CPU and GA requires a certain reset period immediately after power up. All operations return to their initial status after the reset operation. The reset IC (U1) on this printer monitors the logic power source (VCC, Standard output: +5V), and sets the reset signal to LOW when the VCC is 4.2V or lower.
Page 242 Confidential The host interface reset signal (DSR signal and pin 25 input signal) is connected through DSW 2-7 and 2-8. When the reset signal (LOW) is applied here, the printer is reset. In the reset status, the CPU and GA are initialized, but the power remains on, and this status differs from when the power is turned on again.
Page 243: Slip Mechanism Drive Function
Confidential TM-U675/U675P (with autocutter) Service Manual Slip Mechanism Drive Function The main functions of the slip mechanism are described below: Impact head drive Carriage motor drive Paper feed motor drive Lever motor drive Lever drive MICR solenoid drive circuit MICR signal detection circuit...
Page 244 Confidential The SHEAD 1-9 signal lines (LOW active) are on the left side. These signals are directly driven by the GA (directly connected to GA [U30]). Signals SHEAD 1-9 are input to the head drive (QM3, 6, Q12: All NPN Darlington transistors) via the print driver (QM2, 4, 5, 7, Q13: All PNP transistors).
Page 245 Confidential TM-U675/U675P (with autocutter) Service Manual Carriage Motor Drive Circuit The carriage motor for this printer is a two-phase stepping motor. Constant-current drive is provided using 2-2 phase excitation as the drive method. Therefore, a dedicated constant- current drive chopping driver (U14, A2917SEB made by Alegrow) is used.
Page 246 Confidential The drive signal to drive the phases is sent at the logical level of the PHASE1, 2 terminals. The motor driver cannot operate unless signal 24VSW1 in the circuit diagram is set to HIGH (controlled by the GA). When this signal is at a status other than HIGH, IC consumption is 0, and no electricity goes to the motor.
Page 247 Confidential TM-U675/U675P (with autocutter) Service Manual Lever Motor Drive Circuit This printer has a DC type lever motor for the purpose described below. Adjustment of paper path changeover timing Adjustment of shaft rotation position Rotation of the lever motor starts changeover of the paper path and the platen open/close operation.
Page 248 Confidential Lever Drive Circuit This printer has two levers to drive the mechanism. The lever motor rotation enables lever A and lever B to function. This controls the mechanism. Lever A and lever B are solenoids driven by 24V. Simple drive of lever A and lever B is performed by an NPN Darlington transistor.
Page 249 Confidential TM-U675/U675P (with autocutter) Service Manual MICR Solenoid Drive Circuit (Factory Option) This printer can have an optional MICR mechanism. MICR reading is performed when a check is inserted. The MICR solenoid is a locking solenoid that uses a permanent magnet, and performs the following operations: •...
Page 250 Confidential The MICR solenoid is not driven when MICR_SOL2 is HIGH. MICR_SOL1 is the solenoid drive signal. This is to prevent a short when the transistors go on at the same time. The MICR solenoid drive circuit is shown below. QM8(9) QM8(7) MICR_SOL1...
Page 251 Confidential TM-U675/U675P (with autocutter) Service Manual The magnetic reader head recognizes the magnetized characters as shown below. S S N N Figure D-60 The voltage waveform output from the magnetic reader head is different for each character, making it possible to recognize each individual character.
Page 252 Confidential Table D-12 Detection circuits Type of Detector Function Sensor Circuit Impact Head Head Thermistor VCC potential voltage ratio of thermistor resistance value and Temperature temperature R72 is read by the AD port of the CPU Thermal Head Head Thermistor VCC potential voltage ratio of thermistor resistance value and Temperature temperature...
Page 253 Confidential TM-U675/U675P (with autocutter) Service Manual Autocutter Drive Circuit The autocutter is composed of a DC motor. The autocutter is driven by a dedicated DC motor driver (made by Toshiba TA8428K). The autocutter outputs signals from the GA (U30) and is controlled by AC_M1 and AC_M2.
Page 254: Input Circuits
Confidential Input Circuits Logic Power Source Circuit The logic power source circuit generates the power for this printer. The CPU, GA, and most other circuits do not operate if voltage is not output by the logic power source circuit. The power source circuit has an input of 24V, and uses a dedicated DC/DC converter IC (U11: ±...
Page 255 Confidential TM-U675/U675P (with autocutter) Service Manual Rush Current Control Circuit The rush current control circuit controls rush current when the power source is turned on. This printer has large-capacity condensers to facilitate stable operation of mechanism drivers and circuits. Therefore, an excess of rush current is generated when the power is turned on. This circuit controls the rush current.
Page 256 Confidential Switch Circuit The 24V supplied from the external power source is supplied to the required locations in this circuit. The supply power source and application are described below. The 5V system is controlled by the same switch. Table D-14 Switch circuit Type (circuit Switch network name)
Page 257: Control Panel Functions
Confidential TM-U675/U675P (with autocutter) Service Manual Control Panel Functions This printer has four LEDs and two input switches. Display Functions The LED displays are shown below. The CPU (U3) controls them. Table D-15 Types of displays Circuit Signal Color Application...
Page 258: Malfunction Protective Circuit
Confidential Malfunction Protective Circuit This printer has the following three malfunction protection functions: GA operation monitor The CPU (U3) monitors GA clock oscillation. The CPU firmware reads a specific GA register at an arbitrary time, and compares that value with the value previously read. If the results of the comparison are different, the system is judged to be operating normally.
Page 259: Interfaces
TM-U675/U675P (with autocutter) Service Manual Interfaces This printer has a variety of interfaces. There is a dedicated connector (CNB) for the EPSON customer display. A general-purpose drawer can be connected to CN9 and used. The optional interface board allows communication with more interfaces.
Page 260: Important Parts
Confidential Important Parts Fuses Table D-16 Fuses Fuse Function Standard Fuse F1 Main fuse, provided for safety purposes. Fuse may burn out R452003 Littelfuse Inc. when input circuit is unsafe. Make sure to use the same type of fuse when it is replaced. Replace the fuse after eliminating the cause of the burn out.
Page 261: Dip Switch Settings
Confidential TM-U675/U675P (with autocutter) Service Manual DIP Switch Settings Serial Interface Specifications DIP Switch 1 Table D-17 DIP switch 1 settings Switch No. Function Data receive error Ignored "?" printed Receive buffer capacity 45 bytes Handshake XON/XOFF DTR/DSR Bit length...
Page 262 Confidential DIP Switch 2 Table D-19 DIP switch 2 settings Switch No. Function Handshake operation (BUSY condition) Receive buffer full Offline or receive buffer full Customer display (DM-D) connection Connected Not connected Printing line count selection Multi Standard TM-U375 print width compatibility mode Compatible Not compatible Used internally...
Page 263: Parallel Interface Specifications
Confidential TM-U675/U675P (with autocutter) Service Manual Parallel Interface Specifications DIP Switch 1 Table D-21 DIP switch 1 settings Switch No. Function Auto carriage return Enabled Disabled Reception buffer capacity 45 bytes Reserved Fixed to OFF Reserved Fixed to OFF Reserved...
Page 264: Outline Of Specifications
Confidential Outline of Specifications Features This product was designed as a high-performance POS printer where one unit can handle printing slips, validations, and journals (journals and receipts using pressure-sensitive paper) and to be highly reliable, durable, and long-lasting. The main features are listed below. •...
Page 265: Printer Unit
Confidential TM-U675/U675P (with autocutter) Service Manual Printer Unit Printing Specifications Printing method Serial impact dot matrix Head wire arrangement 9 x 1 row, wire pitch of approx. 0.353 mm {1/72 inch} Printing direction Bidirectional printing at shortest distance Print speed Approx.
Page 266: Micr Reader (Factory Option)
° ° 98% or more (at 25 C {77 • Standard evaluation checks made by EPSON were used for testing purposes. • Checks should be free of curls, bends, wrinkles, etc. Autocutter Partial cut: Cutting with one point left uncut.
Page 267: Overall Specifications
Confidential TM-U675/U675P (with autocutter) Service Manual Overall Specifications Internal Buffer Table D-30 Internal buffer capacity Buffer Capacity Receive buffer 45 bytes or 4KB, selected by DIP switch Communication baud rate 2400, 4800, 9600, 19200 bps NV bit image storage area...
Page 268: Interface Features
Confidential Interface Features RS-232C Serial Interface Table D-36 RS-232C serial interface specifications Item Specifications Data transfer method Serial Synchronization Asynchronous Handshake DTR/DSR or XON/XOFF control MARK: - 3V  - 15 V, Logic "1" Signal level SPACE: + 3V  + 15 V, Logic "0" Stop bit 1 bit fixed Printer connector...
Page 269 Confidential TM-U675/U675P (with autocutter) Service Manual RS-485 Serial Interface Table D-38 RS-485 serial interface specifications Item Specifications Data transfer method Serial Synchronization Asynchronous Handshake DTR/DSR or XON/XOFF control 2.5V  Signal level 5 V: Logic "1" 0.0V  0.8 V: Logic "0"...
Page 270 Confidential Appendix D-82 Product Overview Rev.D...
Page 271: Alphanumeric List
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix E Parts List Note: The assist frame sub assembly is not included in the mechanism assembly supplied as a service part. For that reason, when replacing the mechanism assembly, replace it after attaching the assist frame sub assembly to it.
Page 272 Confidential name for service manual name for price list q’ty page ref.# Circuit board FFC FFC,CIRCUIT BOARD Clamp CLAMP Clutch washer WASHER,CLUTCH Connector plate (type AA) PLATE,CONNECTOR,AA Control panel cable CABLE,SWITCH PANEL Control panel circuit board assembly SWITCH PANEL CIRCUIT BOARD ASSEMBLY Control panel label LABEL,SWITCH PANEL,AA Control panel unit...
Page 273 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Form stopper spring SPRING,FORM STOPPER F-5,6 Front case CASE,FRONT,AA Front cover detector assembly FRONT COVER DETECTOR ASSEMBLY F-3,4 Front frame FRAME,FRONT F-5,6 Front reinforcement frame...
Page 274 Confidential name for service manual name for price list q’ty page ref.# Lead wire (type G) LEAD WIRE,G F-5,6 Lead wire (type H) LEAD WIRE,H F-5,6 Lead wire (type I) LEAD WIRE,I F-5,6 Lead wire (type J) LEAD WIRE,J F-5,6 Lead wire (type K) LEAD WIRE,K F-5,6...
Page 275 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Main circuit board (type AB) assembly MAIN CIRCUIT BOARD,AB ASSEMBLY F-5,6 Main circuit board unit (with MICR) MAIN CIRCUIT BOARD UNIT Main circuit board unit (without MICR)
Page 276 Confidential name for service manual name for price list q’ty page ref.# Operation label (type EA) LABEL,OPERATION,EA Operation label (type FA) LABEL,OPERATION,FA Paper ejection detector assembly PAPER EJECTION DETECTOR ASSEMBLY F-3,4 Paper ejection detector cable (type A) CABLE ASSEMBLY,PAPER EJECTION F-5,6 assembly DETECTOR,A...
Page 277 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Platen adjustment screw SCREW,PLATEN ADJUSTMENT Platen assembly PLATEN ASSEMBLY Platen ground plate (type A) PLATE,PLATEN GROUND,A Platen ground plate (type B) PLATE,PLATEN GROUND,B...
Page 278 Confidential name for service manual name for price list q’ty page ref.# Screw (C.B.P-tite, 3X6) C.B.P-TITE SCREW,3X6,F/ZN F-3,4,5,6,8 Screw (C.B.P-tite, 3x8) C.B.P-TITE,3x8,F/ZN Screw (C.B.P-tite, 3X8) C.B.P-TITE SCREW,3X8,F/ZN F-5,6 Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN F-1,2 Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN F-3,4...
Page 279 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Sub paper feed roller assembly ROLLER,SUB PAPER FEED ASSEMBLY Sub paper hold roller ROLLER,SUB PAPER HOLD Sub paper hold roller shaft SHAFT,SUB PAPER HOLD ROLLER...
Page 280: Reference Number List
Confidential Reference Number List name for service manual name for price list q’ty page ref.# Screw (C.B.P-tite, 3x8) C.B.P-TITE,3x8,F/ZN Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN F-1,2 Screw (C.P.T-B, 3X10) C.P.T-B SCREW,3X10,F/ZN F-1,2 Screw (C.C., 4X20) C.C.SCREW,4X20,F/ZN E-ring (2) RETAINING RING TYPE-E(2) F/UC Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN Screw (C.P.S-tite(0), 3X6)
Page 281: Tm-U675/U675P
Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Support plate PLATE,SUPPORT,A Table holder HOLDER,TABLE,A Operation label (type FA) LABEL,OPERATION,FA Operation label (type BA) LABEL,OPERATION,BA Holder plate (type A) PLATE,HOLDER,A Holder spring...
Page 282 Confidential name for service manual name for price list q’ty page ref.# Break plate sub assembly PLATE,BREAK SUB ASS’Y,A Cover frame sub assembly FRAME,COVER SUB ASS’Y,A Right cover plate sub assembly PLATE,COVER SUB ASS’Y,R Left cover plate sub assembly PLATE,COVER SUB ASS’Y,L Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN Cutter frame sub unit...
Page 283 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Platen spring SPRING,PLATEN Oil ring OIL RING Slip insertion detector holder HOLDER,SLIP INSERT DETECTOR F-5,6 Nylon clip NYLON CLIP F-3,4 Screw (C.P.P-tite, 3X12) C.P.P-TITE SCREW,3X12,F/ZN...
Page 284 Confidential name for service manual name for price list q’ty page ref.# Sub paper hold roller shaft SHAFT,SUB PAPER HOLD ROLLER Guide roller shaft SHAFT,GUIDE ROLLER Paper hold roller shaft SHAFT,PAPER HOLD ROLLER Paper feed frame shaft SHAFT,PAPER FEED FRAME F-3,4 Sub slip feed lever shaft SHAFT,SUB SLIP FEED LEVER...
Page 285 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Platen ground plate (type B) PLATE,PLATEN GROUND,B Cover ground plate PLATE,COVER GROUND Paper feed frame stopper STOPPER,PAPER FEED FRAME F-3,4 Backup paper guide cap...
Page 286 Confidential name for service manual name for price list q’ty page ref.# Carriage cover frame assembly FRAME,CARRIAGE COVER ASSEMBLY F-3,4 Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN F-3,4 Screw (C.P.S-tite F, 3X5) C.P.S-TITE F,3X5,F/ZN F-3,4 Screw (C.C., 2X3) C.C.2X3,F/ZN F-3,4 Screw (C.C., 3X5) C.C.SCREW,3X5,F/ZN F-3,4 Nylon lock nut...
Page 287 Confidential TM-U675/U675P (with autocutter) Service Manual name for service manual name for price list q’ty page ref.# Lead wire (type I) LEAD WIRE,I F-5,6 Lead wire (type J) LEAD WIRE,J F-5,6 Lead wire (type K) LEAD WIRE,K F-5,6 Lead wire (type L)
Page 288 Confidential name for service manual name for price list q’ty page ref.# MICR lever fixing plate FIXING PLATE,MICR LEVER MICR shield cover (type A) COVER,MICR SHIELD,A MICR connector assembly CONNECTOR ASSEMBLY,MICR MICR lever LEVER,MICR MICR fixing MICR FIXING MICR solenoid SOLENOID,MICR MICR lever spring SPRING,MICR LEVER...
Page 289 Confidential TM-U675/U675P (with autocutter) Service Manual Appendix F Exploded Diagrams TM-U675/U675P SERIAL PARALLEL Rev.D Exploded Diagrams Appendix F-1...
Page 290: Autocutter Assembly
Confidential TM-U675/U675P (with autocutter) Service Manual Autocutter Assembly Rev.D Exploded Diagrams Appendix F-2...
Page 291: Mechanism Assembly (Without Micr)
Confidential TM-U675/U675P (with autocutter) Service Manual Mechanism Assembly (without MICR) Rev.D Exploded Diagrams Appendix F-3...
Page 292: Mechanism Assembly (With Micr)
Confidential TM-U675/U675P (with autocutter) Service Manual Mechanism Assembly (with MICR) Rev.D Exploded Diagrams Appendix F-4...
Page 293: Frame Assembly (Without Micr)
Confidential TM-U675/U675P (with autocutter) Service Manual Frame Assembly (without MICR) 740 741 Rev.D Exploded Diagrams Appendix F-5...
Page 294: Frame Assembly (With Micr)
Confidential TM-U675/U675P (with autocutter) Service Manual Frame Assembly (with MICR) 740 741 Rev.D Exploded Diagrams Appendix F-6...
Page 295: Carriage Assembly
Confidential TM-U675/U675P (with autocutter) Service Manual Carriage Assembly Rev.D Exploded Diagrams Appendix F-7...
Page 296: Pf Assembly
Confidential TM-U675/U675P (with autocutter) Service Manual PF Assembly Rev.D Exploded Diagrams Appendix F-8...
Page 297: Micr Unit
Confidential TM-U675/U675P (with autocutter) Service Manual MICR Unit Rev.D Exploded Diagrams Appendix F-9...
Page 298 Confidential TM-U675/U675P (with autocutter) Service Manual Appendix G General Lubrication Point Diagrams TM-U675/U675P G-36 G-36 G-36 SERIAL PARALLEL Rev.D General Lubrication Point Diagrams Appendix G-1...
Page 299 Confidential TM-U675/U675P (with autocutter) Service Manual Autocutter Assembly G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-15 G-15 Rev.D General Lubrication Point Diagrams Appendix G-2...
Page 300 Confidential TM-U675/U675P (with autocutter) Service Manual Mechanism Assembly (without MICR) G-48 G-36 G-36 G-48 G-36 G-36 G-36 G-36 G-36 Rev.D General Lubrication Point Diagrams Appendix G-3...
Page 301 Confidential TM-U675/U675P (with autocutter) Service Manual Mechanism Assembly (with MICR) G-48 G-36 G-36 G-48 G-36 G-36 G-36 G-36 G-36 Rev.D General Lubrication Point Diagrams Appendix G-4...
Page 302 Confidential TM-U675/U675P (with autocutter) Service Manual Frame Assembly (without MICR) G-48 G-48 G-48 G-48 G-48 G-36 G-48 G-36 G-36 G-48 G-36 G-36 G-48 Rev.D General Lubrication Point Diagrams Appendix G-5...
Page 303 Confidential TM-U675/U675P (with autocutter) Service Manual Frame Assembly (with MICR) G-48 G-48 G-48 G-48 G-48 G-36 G-48 G-36 G-36 G-48 G-36 G-36 G-48 Rev.D General Lubrication Point Diagrams Appendix G-6...
Page 304 Confidential TM-U675/U675P (with autocutter) Service Manual Carriage Assembly G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 G-36 O-10 G-36 G-36 O-10 Rev.D General Lubrication Point Diagrams Appendix G-7...
Page 305 Confidential TM-U675/U675P (with autocutter) Service Manual PF Assembly G-48 G-48 G-48 G-36 G-48 G-36 G-36 Rev.D General Lubrication Point Diagrams Appendix G-8...
Page 306 Confidential TM-U675/U675P (with autocutter) Service Manual MICR Unit G-47 G-47 Rev.D General Lubrication Point Diagrams Appendix G-9...
Page 307: Using The Power Switch Cover
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix I Printer Handling Using the Power Switch Cover WARNING: If an accident occurs when the power switch cover is attached, unplug the power cord from the outlet immediately to avoid fire or shock.
Page 308: Opening The Front Cover
Confidential Opening the Front Cover You can open the front cover of the printer by using the tabs on each side of the cover. Figure I-2 Opening the front cover Opening and Closing the Roll Paper Cover Opening the Roll Paper Cover Pull the latch levers on the right and left sides of the roll paper cover in the direction of the arrow marked and push the cover so that it rotates toward the back to open the cover.
Page 309: Closing The Roll Paper Cover
Confidential TM-U675/U675P (with autocutter) Service Manual Closing the Roll Paper Cover Note: If you do not close the roll paper cover using the following procedures, a paper jam can occur. 1. Check that the power to the printer is turned ON. If it is not ON, turn it ON.
Page 310 Confidential 3. Pull the latch levers on the right and left sides of the roll paper cover in the direction of the arrow marked and push the cover so that it rotates toward the back to open the cover. latch levers Figure I-5 Opening the roll paper cover 4.
Page 311 Confidential TM-U675/U675P (with autocutter) Service Manual 6. Be sure to note the correct direction that the paper should come off the roll. Figure I-7 Correct direction 7. Turn ON the power supply to the printer. 8. Hold both edges of the paper and insert it into the paper slot. The paper is automatically fed into the printer.
Page 312 Confidential 9. When using 2-ply roll paper, insert the end of the journal paper into the take-up spool as shown below. Be sure that 40 to 60 mm (1.5 to 2.25 in.) of paper extends beyond the spool and that the right side of the paper is against the spool’s flange. spool Figure I-9 Inserting the end of the journal paper into the take-up spool 10.
Page 313: Removing Paper
Confidential TM-U675/U675P (with autocutter) Service Manual Removing Paper If you need to remove roll paper before it is all gone, follow these steps: 1. Lift up the take-up spool with the journal paper attached. 2. Cut the paper off behind the paper insert slot.
Page 314: Installing The Ribbon Cassette
Confidential Installing the Ribbon Cassette To install the ribbon cassette for the first time or to replace a used ribbon, follow the steps below: Note: Be sure to turn on the power before installing a ribbon cassette. 1. Unpack the ribbon cassette and turn the knob in the direction shown to take up any slack. knob Figure I-12 Turning the knob 2.
Page 315 Figure I-15 Making sure if the ribbon is seated correctly 6. Close the front cover of the printer. EPSON recommends the use of genuine EPSON ribbon cassettes. Ribbon cassettes not manufactured by EPSON may cause damage to your printer that is not covered by EPSON’s warranties. Rev.D...
Page 316: Inserting Slip Paper
Confidential Inserting Slip Paper When you insert slip paper, be sure that the right side of the paper is against the right side of the paper guide, as shown below. Figure I-16 Inserting slip paper Inserting Validaton Paper When you insert validation paper, be sure that the right side of the paper is against the right side of the paper guide, as shown below.
Page 317: Reading Micr Characters On Personal Checks
Confidential TM-U675/U675P (with autocutter) Service Manual Reading MICR Characters On Personal Checks To use the MICR function with personal checks (for printers with the factory-installed optional MICR reader), follow the steps below: CAUTION: Do not insert checks with staples in them. This may cause paper jams, MICR reading errors, and damage to the MICR head.
Page 318: Adjusting The Roll Paper Near End Detector
Confidential Adjusting the Roll Paper Near End Detector The paper near end detector detects when paper is almost gone by measuring the diameter of the paper roll. The detector has five settings. The factory setting (#5) leaves the least paper on the roll when the near-end sensor is triggered.
Page 319: Using The Control Panel
Confidential TM-U675/U675P (with autocutter) Service Manual Using the Control Panel Most of the functions of this printer are governed by software, but you can monitor the printer’s status by looking at the lights on the control panel, and for some procedures you will use the buttons.
Page 320 Confidential RELEASE Use this button to release slip paper or to start a slip or validation paper self test. (See Figure I-20) Appendix I-14 Printer Handling Rev.D...
Page 321 Confidential TM-U675/U675P (with autocutter) Service Manual Appendix J Screw Types Washer (assembled) Head (side) Head (top) Body Figure J-1 Screw configuration Table J-1 Screw types Head (top) Head (side) Body Washer (assembled) C (Cross) P (Pan) S-tite (S) (Spring lock washer)
Page 322 Confidential Appendix J-2 Screw Types Rev.D...
Page 323: Main Circuit Board Unit (Parts Side)
Confidential TM-U675/U675P (with autocutter) Service Manual Appendix K Parts Layout Main Circuit Board Unit (Parts Side) (memory board) Rev.D Parts Layout Appendix K-1...
Page 324: Main Circuit Board Unit (Solder Side)
Confidential 　　　　 Main Circuit Board Unit (Solder Side) (memory board) Appendix K-2 Parts Layout Rev.D...
Page 325 EPSON SEIKO EPSON CORPORATION Printed in Japan...

This manual is also suitable for:

Tm-u675p

Epson TM-U675 Service Manual

Chapter 1 Troubleshooting

Chapter 2 Assembly and Disassembly

Chapter 3 Adjusting and Setting

Appendix A Service Tools and Lubricants

Appendix B Maintenance

Appendix C Installation

Appendix D Product Overview

Appendix E Parts List

Appendix F Exploded Diagrams

Appendix G General Lubrication Point Diagrams

Appendix I Printer Handling

Appendix J Screw Types

Appendix K Parts Layout

Quick Links

Service manual

Troubleshooting

Related Manuals for Epson TM-U675

Summary of Contents for Epson TM-U675

This manual is also suitable for:

Table of Contents