Epson TM-U950T Diagram
CONFIDENTIAL
TM-U950/U950P
Using this online technical guide
The words on the left side of this screen are bookmarks for all the
topics in this guide.
Use the scroll bar next to the bookmarks to find any topic you
want. Click a bookmark to instantly jump to its topic. (If you wish,
you can increase the size of the bookmark area by dragging the
dividing bar to the right.)
Use the scroll bar on the right side of this screen to move through
the text.
Use the zoom tools to magnify or reduce the page display.
Click the Find button if you want to search for a particular term.
(However, using the bookmarks is usually quicker.)
Technical Manual
Complete online documentation for Acrobat Reader is located in the Help directory for Acrobat Reader.
Return to main menu
Technical manual
TM-U950/TM-U950P
Copied Date 199 , ,
Copied by
English
4005789
CONFIDENTIAL
EPSON
SEIKO EPSON CORPORATION
Printed in Japan E96010130-0000SE
Confidential
CONFIDENTIALITY AGREEMENT
BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS
AGREEMENT. PLEASE RETURN THIS DOCUMENT IMMEDIATELY IF YOU DO NOT AGREE
TO THESE TERMS.
1. This document contains confidential, prop rietary informat ion of Seiko Epson Corporation or
its affiliates. You must keep such information confidential. If the user is a business entity or
organization, you must limit disclosure to those of your employees, agents and contractors
who have a need to know and who are also bound by obligations of confidentiality.
2. 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.
3. If a court, arbitrator, government agency or the like orders you to disclose any confidential
information, you must immediately notify Seiko Epson. You agree to give Seiko Epson
reasonable cooperation and assistance in resisting disclosure.
4. You may use confidential information only for the purpose of operating or servicing the
products to which the document relates, unless you obtain the pr ior written consent of Seik o
Epson for some other use.
5. Seiko Epson warrants that it has the right to disclose the confidential information. SEIKO
EPSON MAKES NO OTHER WARRANTIES CONCERNING THE CONFIDENTIAL
INFORMATION OR ANY OTHER INFORMATION IN THE DOCUMENT, INCLUDING
(WITHOUT LIMITATION) ANY WARRANTY OF TITLE OR NON-INFRINGEMENT.
Seiko Epson has no liability for loss or damage arising from or relating to your use of or
reliance on the information on the document.
6. You may not reproduce, store or transmit the confidential information in any form or by any
means (electronic, mechanical, photocopying, recording, or otherwise) without the prior
written permission of Seiko Epson.
7. Your obligations under this Agreement are in addition to any other legal obligations. Seiko
Epson does not waive any right under this Agreement by failing to exercise it. The laws of
Japan apply to this Agreement.
CONFIDENTIAL
FCC CLASS A
FCC Compliance Statement
For American Users
This equipment has been tested an d found to compl y with the limits for a Cla ss A digita l devic e, pursuant to Pa rt 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference, in which case the user will be required to correct the
interference at his own expense.
WARNING
The connection of a non-shielded printer interface cable to this printer will invalidate the FCC Verification of this
device and may cause interference levels which exceed the limits established by the FCC for this equipment.
You are cautioned that changes or modifications not expre ssly approved by the party r esponsible for compliance could
void your authority to operate the equipment.
TM-U950/TM-U950P Technical Manual
FOR CANADIAN USERS
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in
the radio interference regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de Class A prescrites dans le règlement sur le brouillage radioélectrique édicté par le Ministère des
Communications du Canada.
GEREÄUSCHPEGEL
Gemäß der Dritten Verordrung zu m Gerätesich erheits gecsetz (M aschinen lärminfo rmation s- Verordn ung-3. GS GV) ist
der arbeitsplatzbezogene Geräusch-Emissionswert kleiner als 70 dB(A ) (basierend auf ISO 7779).
Rev. A i
CONFIDENTIAL
Introduction
The TM-U950 printer is an ESC/POS® compatible high-performance point of sale (POS) printer
which can handle receipt, journal, and slip paper. There are two models: the TM-U950 and the
TM-U950P. The TM-U950P has a parallel interface. Differences between the two models are
noted throughout this manual.
The main features of the TM-U950 and TM-U950P printers are the following:
❏Usable with a wide range of slip paper types.
❏Non-protruding interface connectors integrated in the body of the printer.
❏Bidirectional logic seek for high throughput.
❏Paper feed pitch of 1/144 inch.
❏Integrated printer buffer with 32 byte or 2 KB capacity.
❏Slip paper eject sensor.
❏ASB (Automatic Status Back) function to send the printer status automatically.
❏EPSON intelligent module connection (Not available on the TM-U950P).
❏EPSON customer display series connection (Not available on the TM-U950P).
❏Optional Magnetic Ink Character Recognition (MICR) reader that enables the printer to
perform consecutive reading and p rocessing of MICR characters and pri nting endorsements
(not available for the TM-U950P).
ii Rev. A
CONFIDENTIAL
About This Manual
❏
Chapter 1 provides general specifications and hardware configuration information.
❏
Chapter 2 provides general operating principles and printer mechanism configuration
information.
❏
Chapter 3 provides handling and maintenance information.
❏
Chapter 4 provides troubleshooting information.
❏
Chapter 5 provides printer disassembly, assembly, and adjustment instructions.
❏
Chapter 6 (Appendix) provides circuit board and exploded diagrams.
Notes and Cautions
Note:
Notes have important information and useful tips on the operation of your printer.
TM-U950/TM-U950P Technical Manual
CAUTION:
Cautions must be observed to avoid damage to your equipment.
Rev. A iii
CONFIDENTIAL
Revision Sheet
Revision Page Altered Item and Contents
Rev. A
iv Rev. A
CONFIDENTIAL
Contents
TM-U950/TM-U950P Technical Manual
Chapter 1
Features ...................................................................................................................................................................................... 1-1
General Specifications ..............................................................................................................................................................1-3
Printing Specifications.......................................................... ......................... .......................... ... .......................... ............ 1-3
Character Specifications .................................................................................................................................................. 1-4
Paper Specifications ......................................................................................................................................................... 1-5
Paper Roll Feed Mechanism ............................................................................................................................................1-9
Journal Paper Take-up Mechanism ................................................................................................................................1-9
Auto-cutter ........................................................................................................................................................................1-9
Electrical Specifications ....................................................................................................................................................1-9
Stamp .................................................................................................................................................................................. 1-10
Ink Ribbon .........................................................................................................................................................................1-10
Dimensions, Weight, Finish ....................................................... ......................... .......................... ... .......................... ..... 1-11
Environmental Specificati o ns ........................................................... .......................... ......................... .... .......................1-11
Reliability ........................................................................................................................................................................... 1-12
Hardware Configuration .........................................................................................................................................................1-13
Main Unit Configuration ............................................................ ......................... .......................... ... .......................... ..... 1-13
Main Unit Specifications .............. ... .... .... ......................... ......................... .......................... .... ......................... ................1-14
Connectors ......................................................................................................................................................................... 1-17
Interface .............................................................................................................................................................................. 1-19
Switches and Buttons ....................................................................................................................................................... 1-27
Functions .................................................................................................................................................................................... 1-31
Error Processing ................................................................................................................................................................1-31
Self-test ............................................................................................................................................................................... 1-32
Hexadecimal Dumping ....................................................................................................................................................1-32
Printing Operation ................ .......................... ......................... .......................... ... .......................... ......................... ......... 1-33
Options ....................................................................................................................................................................................... 1-34
AC Adapter (PS-150) ........................................................................................................................................................ 1-34
Journal Lock ......................................................................................................................................................................1-34
Features and General Specifications
Chapter 2
Printer Mechanism Components ............................................................................................................................................ 2-1
Printer Mechanism Operating Principles ..............................................................................................................................2-2
Printing Assembly............................................... ... .......................... ......................... ......................... .... ......................... ..2-2
Sensor Assemblies.............................................................................................................................................................2-4
Paper Feed Assembly .......................................................................................................................................................2-9
Slip Paper Assembly ........................................................................................................................................................2-12
MICR Reader Assembly (for printers with a MICR reader) (not available for the TM-U950P) ........................... 2-16
Ribbon Feed Assembly ....................................................................................................................................................2-18
Stamp Assembly (for printers with a stamp assembly) ..............................................................................................2-19
Auto-cutter Assembly ...................................................................................................................................................... 2-20
Paper Roll Take-up Assembly ........................................................................................................................................ 2-23
Electrical Circuitry Operating Principles .............................................................................................................................. 2-25
Hardware Configuration ................................................................................................................................................. 2-25
Main Board Operating Principle .................................... ......................... .......................... ......................... .... ................2-30
MICR Board Operating Principle (on printers with a MICR reader) (not available for the TM-U950P) ............ 2-49
Mechanism Configuration and Operating Principles
Rev. A v
CONFIDENTIAL
Chapter 3 Handling and Maintenance
Handling .....................................................................................................................................................................................3-1
Handling Precautions .......................................................................................................................................................3-1
Loading the Paper Rolls ...................................................................................................................................................3-2
Removing the Paper Rolls ................................. ... .... ......................... .... ......................... .......................... ........................3-4
Inserting Slip Paper and Printing on Slip Paper ...........................................................................................................3-5
Printing on Personal Checks (only on printers with a MICR reader) (not available for the TM-U950P) ............3-6
Installing and Removing the Ribbon Cassette ..............................................................................................................3-8
Inserting the Stamp Set .....................................................................................................................................................3-9
Mounting the Power Switch Cover ................................................................................................................................3-10
Journal Lock Key Handling .............................................................................................................................................3-10
Removing the Jammed Paper ..........................................................................................................................................3-10
Maintenance ...............................................................................................................................................................................3-13
Periodic Checks .................................................................................................................................................................3-13
Cleaning ..............................................................................................................................................................................3-13
Lubrication .........................................................................................................................................................................3-14
Tool List ..............................................................................................................................................................................3-17
Measuring Equipment List ....................... .... ......................... .......................... ... .......................... ......................... ..........3-18
Lubricant List .....................................................................................................................................................................3-18
Chapter 4 Troubleshooting
Troubleshooting ........................................................................................................................................................................4-1
Self-test ................................................................................................................................................................................4-1
Troubleshooting Flowchart ..............................................................................................................................................4-4
Troubleshooting Tables ....................................................................................................................................................4-12
Major Part Replacements .........................................................................................................................................................4-23
Fuse replacement ...............................................................................................................................................................4-23
Print Head Unit Replacement .........................................................................................................................................4-23
Cutter Blade Replacement ................................................................................................................................................4-23
Error Types And Countermeasures ........................................................................................................................................4-24
Chapter 5 Disassembly, Assembly, and Adjustment
Small Part Specifications ..........................................................................................................................................................5-1
Actual Size E-type Retaining Rings ................................................................................................................................5-1
Disassembly ...............................................................................................................................................................................5-2
Replacing the Print Head Unit ........................................................................................................................................5-3
Replacing the Cutter Blade ..............................................................................................................................................5-5
Printer Mechanism Unit Assembly .........................................................................................................................................5-6
Sub-assembly A: Detector-Paper Assembly...................................................................................................................5-7
Sub-assembly B: Paper Guide-Upper Unit As sem bl y .................................................................. ......................... .... ..5-8
Sub-assembly C: Paper Guide-Lower Unit Assembly..................................................................................................5-10
Sub-assembly D: Cutter Motor Mount Plate Assembly ...............................................................................................5-12
Sub-assembly E: Roller-Paper Ho ld Asse mbly........................ ......................... .... .......................... ......................... ......5-12
Sub-assembly F: Cutter Frame Assemb ly............................. .... .... ... .......................... ......................... .......................... ..5-13
Sub-assembly G: Detector-Slip Ejection Assembly.......................................................................................................5-13
Sub-assembly H: Auto-cutter Unit Assembly ...............................................................................................................5-14
Sub-assembly I: Pulley Base-Carriage Transmission Assembly .................................................................................5-17
Sub-assembly J: Carriage-Head Assembly ....................................................................................................................5-17
Sub-assembly K: Assembling the MICR Head Hold er Ass em bly (for printe rs with a MICR rea der) .................5-18
Sub-assembly L-(1): Frame-Carriage Unit Assembly (for printers without a MICR reader) .................................5-22
Sub-assembly L-(2): Frame Carriage Unit Assembly (for printers with a MICR reader) ........................................5-27
Sub-assembly M: Frame-Inner Assembly.......................................................................................................................5-35
Sub-assembly N: Detector-Slip Insertion Assembly .....................................................................................................5-36
Sub-assembly O: Solenoid J/S Changeov er As semb ly............... ......................... .... ......................... .......................... ..5-36
Sub-assembly P: Paper Guide-Slip-Lower Assembly...................................................................................................5-37
vi Rev. A
CONFIDENTIAL
Sub-assembly Q: Frame-Paper Take-up Assembly......................................................................................................5-38
Sub-assembly R: Assembling the motor-paper guide-J assembly (for printers with a MICR reader).................. 5-39
Main Assembly (Part 1) ...................................................................................................................................................5-40
Adjustments ......................................................................................................................................................................5-53
Main Assembly (Part 2) ...................................................................................................................................................5-59
Whole Unit Assembly .............................................................................................................................................................. 5-65
Sub-assembly A: N.E. Detector-J Assembly and N.E. Detector-R Assembly...........................................................5-65
Sub-assembly B: Holder-Switc h Circuit Board As semb ly ....................... .... ......................... .......................... ............ 5-67
Sub-assembly C: Journal Lock and Cover-Paper Take-up Assembly (Option) ...................................................... 5-68
Sub-assembly D: Cover Paper Take-up ......................................................................................................................... 5-69
Main Assembly .......................... ... .... .......................... ......................... .... ......................... ......................... .......................... ... ..5-70
Main Assembly 1: Main Circuit Board, P-ROM, and Plate-Main Mounting ...........................................................5-70
Main Assembly 2: FFC, Power Cable, and Plate-Circuit Board Attachment ...........................................................5-71
Main Assembly 3: Printer Mechanism Assembly Attachment on Plate-Main ........................................................5-72
Main Assembly 4: N.E. Detector-R and -J Assemblies Attachment .......................................................................... 5-73
Main Assembly 5: Printer Mechanism Assembly Attachment on Case-Lower Assembly .................................... 5-75
Main Assembly 6: Case-Upper Assembly Mounting .................................................................................................. 5-76
Main Assembly 7: Cover-Face and Cover-Main Assembly Attachment .................................................................. 5-77
Main Assembly 8: Cover-ROM Attachment ................................................................................................................. 5-78
Adjustments .............................................................................................................................................................................. 5-79
Adjustment G: Adjusting the Paper Roll Near-end Detector Location ....................................................................5-79
Adjustment H: Detector-Slip Insertion Assembly Threshold Value Adjustment....................................................5-81
Adjustment I: MICR mechanism check..........................................................................................................................5-83
TM-U950/TM-U950P Technical Manual
Chapter 6 Appendix
Electrical Circuit Drawings......................................................................................................................................................6-1
Circuit 1..............................................................................................................................................................................6-2
Circuit 2..............................................................................................................................................................................6-3
Circuit 3..............................................................................................................................................................................6-4
Circuit 4..............................................................................................................................................................................6-5
Circuit 5..............................................................................................................................................................................6-6
Circuit 6..............................................................................................................................................................................6-7
Circuit 7..............................................................................................................................................................................6-7
Circuit 8..............................................................................................................................................................................6-8
Main Unit Circuit Drawing for TM-U950.....................................................................................................................6-9
Main Unit Circuit Drawing for TM-U950P..................................................................................................................6-10
MICR Board (for printers with a MICR reader) (Not available for the TM-U950P) .............................................. 6-11
Parallel Interface Circuit Board Diagram..................................................................................................................... 6-12
Main Circuit Board Parts Layout for TM-U950................................. ......................... .......................... ... ....................6-13
Main Circuit Board Parts Layout for TM-U950 P........................... .......................... ......................... .... .......................6-14
Parallel Interace Circuit Board Parts Layout................................................................................................................ 6-15
Overall Exploded Diagrams...................................................... ......................... .......................... ... .......................... ..... 6-16
Lubrication Points Diagram for Printers Without a MICR Reader (1/3) ................................................................6-26
Lubrication Points Diagram for Printers Without a MICR Reader (2/3) ................................................................6-27
Lubrication Points Diagram for Printers Without a MICR Reader (3/3) ................................................................6-28
Lubrication Points Diagram for Printers With a MICR Reader (1/4)...................................................................... 6-29
Lubrication Points Diagram for Printers With a MICR Reader (2/4)...................................................................... 6-30
Lubrication Points Diagram for Printers With a MICR Reader (3/4)...................................................................... 6-31
Lubrication Points Diagram for Printers With a MICR Reader (4/4)...................................................................... 6-32
Rev. A vii
CONFIDENTIAL
Chapter 1
Features and General Specifications
Features
The TM-U950 printer is an ESC/POS™ compatible high-performance point of sale (POS) printer
which can handle receipt, journal, and slip paper. There are two models: the TM-U950 and the
TM-U950P. The TM-U950P has a parallel interface. Differences between the two models are
noted throughout this manual.
The main features of the TM-U950 and TM-U950P printers are the following:
❏ Usable with a wide range of slip paper types.
❏ Non-protruding interface connectors integrated in the body of the printer.
❏ Bidirectional logic seek for high throughput.
TM-U950/U950P Technical Manual
❏ Paper feed pitch of 1/144 inch.
❏ Integrated printer buffer with 32 byte or 2 KB capacity.
❏ Slip paper eject sensor.
❏ ASB (Automatic Status Back) function to send the printer status automatically.
❏ EPSON intelligent module connection (Not available on the TM-U950P).
❏ EPSON customer display series connection (Not available on the TM-U950P).
❏ Optional Mag netic Ink Cha racter Reco gnition (MICR) reader that enables th e printer to
perform consecutive reading and proce ssing of MI CR chara cters and pri nting en dorsements
(not available for the TM-U950P).
Rev. A Features and General Specifications 1-1
CONFIDENTIAL
Figure 1-1. TM-U950 Appearance
1-2 Features and General Specifications Rev. A
CONFIDENTIAL
General Specifications
Printing Specifications
Operation principle
Serial impact dot-matrix printer
Print head wire layout
Serial 9-pin
Dot pitch
0.353 mm (1/72”)
Dot wire diameter
0.29 mm (.01”)
TM-U950/U950P Technical Manual
Figure 1-2. Dot Configuration
Print direction
Bidirectional logic seek
Print width (printable area)
Paper roll: 61.1 mm (2.41”)
Slip paper: 135.6 mm (5.34”)
Paper feed pitch
4.233 mm (1/6”) (default setting) adjustable (by commands) in 1/144-inch steps
Paper feed principle
Friction feed
Paper feed rate
Approx. 3.4 IPS (continuous paper); 60.3 ms per line (1/6-inch paper feed)
Rev. A Features and General Specifications 1-3
CONFIDENTIAL
Printing format
See CPI in Table 1-2.
Character spacing
See Table 1-2.
Total dot count
70 mm paper roll (2.76”): 180 dots (360 positions) per line
Slip paper: 400 dots (800 positions) per line
Printing speed
See Table 1-2.
As shown in the table below, the TM-U950 has three printing modes, which differ in printing
speed and head power time (impact).
Table 1-1. Printing Operation Mode
Operation mode Printing speed Head power time (impact)
Standard High Standard
Copy Low Copy
Low-speed Low Standard
Character Specifications
Character set
Alphanumeric: 95
International: 32
Extended graphics: 128 x 8 pages
Character matrix
(Alphanumeric, international, extended graphics)
7 x 9 (spacing: 2 half-dots)
0 x 9 (spacing: 3 half-dots)
Larger spacing can be set by using ESC SP.
Table 1-2. CPI, CPS, CPL, Character Size
CG Mode
(Horizontal
dots x
vertical
dots)
9 x 9 3 dots 12.5 233 200 30 66
7 x 9 2 dots 16.7 311 267 40 88
Character
Spacing
(half dots)
Characters
Per Inch
(CPI)
Characters Per Second
(CPS) (Carriage moving
speed)
High speed Low speed Paper roll Slip paper
Characters Per Line (CPL)
Character Size
Width x Height
1.6 mm x 3.1 mm
(0.6” x .12”)
1.3 mm x 3.1 mm
(0.5” x .12”)
1-4 Features and General Specifications Rev. A
CONFIDENTIAL
TM-U950/U950P Technical Manual
Figure 1-3. Character Size
Paper Specifications
Paper type
❏ Paper roll
Wood-free paper (single layer only)
❏ Slip paper
Plain paper
Carbon copy paper
Pressure-sensitive paper
Paper dimensions
❏ Paper roll
Paper width: 69.5 + 0.5 mm (2.74 + 0.02”)
Maximum diameter: 83 mm (3.27”)
Paper thickness: 0.06 to 0.09 mm (.002 to .004”)
Paper weight: 52.3 to 64 g/m
(45 to 55 kg/1000 sheets; 788 x 1091 mm)
(20.41 to 24.94 lbs/1000 sheets; 31.02 x 42.95”)
Core diameter: 10 mm (0.39”) or more
Rev. A Features and General Specifications 1-5
2
(13.9 to 171 lbs)
CONFIDENTIAL
❏ Slip paper
Dimensions: 70 x 70 to 210 x 297 mm (W x H)
Thickness: 0.09 to 0.36 mm (.004 to .014”)
Temperature and copying capability
As copying capability is influenced by the ambient temperature, printing must be performed
under the conditions descri bed in Table 1-3.
Table 1-3. Relationship Between Ambient Temperature and Number of Copies
Number of Copies Ambient Temperature
Original + 4 copies approx. 20
Original + 1 to 3 copies 5
Paper thickness and copying capability
(2.76 x 2.76 to 8.27 x 11.69”)
to 40°C (68° to 104°F)
°
to 40°C (41° to 104°F)
°
❏ Plain paper (single sheet): 0.09 to 0.2 mm
(.0035 to .0079”)
❏ Carbon copy paper (original + 4 copies)
Backing paper 0.06 to 0.15 mm (.002 to .006”)
Copy paper and original paper 0.04 to 0.07 mm (.0016 to .003”)
Carbon paper Approx. 0.035 mm (.001”)
Total thickness 0.30 mm (.012”) or less (1 to 1 + 3)
0.36 mm (.014”) or less (1 + 4)
❏ Pressure-sensitive paper (original + 4 copies)
Backing paper 0.06 to 0.15 mm (.002 to .006”)
Copy paper and original paper 0.06 to 0.075 mm (.002 to .003”)
Total thickness 0.24 mm (.009”) or less (1 to 1 + 3)
0.30 mm (.012”) or less (1 + 4)
Note:
When using multi-ply paper that consists of an original and three copies, be sure to print with a 9 x 9 font.
If a 7 x 9 font is used, some characters on some of the copies may not be readable.
Check paper (only when the printer is used with the MICR reader)
Paper type: Normal paper
Total thickness: 0.09 to 0.2 mm (.0035 to .0079”)
1-6 Features and General Specifications Rev. A
CONFIDENTIAL
Size: 68 to 102 mm x 152 to 210 mm
Weight: 70 to 90 kg paper
Notes on setting the print operation mode
❏ The GS E command sets print mode (printing speed and print head energizing time).
❏ When the power is turned on, normal mode is selected as the default. The printer
automatically switches from normal mode to copy mode when slip is selected by ESC c 0.
Notes on slip paper
❏ The slip paper must be flat, without curls or wrinkles, especially at the top edges. Otherwise,
the paper may rub against the ribbon and become dirty.
❏ There must be no glue on the bottom edge of slip paper. It is desirable for the glue to be on
the top edge. Choose slip paper carefully when the glue is on the right or left edge, since
paper feeding and insertion are affected by gluing conditions (e.g., glue quality, method,
and length) and glue location (see Figure 1-4). Be especially careful when slip paper is wide
and has the glue on the right or left edge, since meandering may occur.
TM-U950/U950P Technical Manual
(2.68 to 4.02” x 2.98 to 8.27”)
❏ Since the slip insertion sensor uses a photo sensor, paper that has holes at the sensor
position, or is translucent, must not be used (see Figure 1-5).
❏ Since the slip ejection sensor uses a reflective photo sensor, paper that has holes or dark
portions with low reflection (less than 40% reflection) at the sensor position must not be
used (see Figure 1-6).
❏ Be sure to perfor m slip printing with a paper roll loaded to avoid incorrect paper feeding
due to paper jams.
❏ Use thinner paper (N30 or equivalent) between the top and bottom sheets of multi-ply
paper. If thick paper is used, the copy capab ility is lowered.
Notes on using personal check paper (for printers with an MICR reader)
❏ The personal checks must be flat, without curls, folds, or wrinkles (especially at the edges).
Otherwise, the check may rub against the ribbon and become ink-stained.
Figure 1-4. Slip Paper Glued Area
Rev. A Features and General Specifications 1-7
CONFIDENTIAL
Figure 1-5. Slip Insertion Sensor Position
Figure 1-6. Paper Holes and Low Reflection Prohibited Area
Print area
❏ Paper roll
Figure 1-7. Paper Roll Print Area
1-8 Features and General Specifications Rev. A
CONFIDENTIAL
❏ Slip paper
Figure 1-8. Slip Paper Print Area
*Note
When the printer uses an MICR reader, this width is 5.0mm (0.20”).
Paper Roll Feed Mechanism
TM-U950/U950P Technical Manual
Feed principle
Drop-in loading
Paper roll near-end detection
Separate sensors for receipt paper and journal paper.
Journal Paper Take-up Mechanism
Automatic take-up by journal paper f eed motor.
Auto-cutter
Auto-cutter is installed only on receipt side, for full and partial cuts.
Electrical Specifications
Printer operation voltage (using supplied AC adapter)
+24 V DC ± 10%
Ripple voltage: 300 mVpp or less (only when the printer is used with the MICR reader)
Current consumption
❏ During printing
Average approx. 1.8 A
(R/J, α - N, 40-character printing)
Peak approx. 8 A
❏ During slip paper feed to printing position:
Average approx. 0.3 A (for approx. 1.4s)
Rev. A Features and General Specifications 1-9
CONFIDENTIAL
❏ During standby
Average approx. 0.3 A
❏ Operating MICR reader
(when the printer used with the MICR reader)
Mean - approximately 2.3 A
(Approximately 1.4 seconds)
Stamp
Stamp mechanism is available as a factory option for the receipt side.
Recommended stamp: Fuji Copian CSP-2042C
Recommended ink: Fuji Copian Super Ink
Print area: 42 x 20 mm (1.65 x 0.79”)
(W x H)
Dimensions of stamp pad: See Figure 1-9.
Dimensions of stamp set: See Figure 1-10.
Figure 1-9. Stamp Pad Dimensions Figure 1-10. Stamp Set Dimensions
Ink Ribbon
Ribbon cassette
ERC-31 (P)
ERC-31 (B)
[Unit: mm]
Color
Purple: ERC-31 (P)
Black: ERC-31 (B)
Ribbon life (18 dots per character)
Figure 1-11. Ribbon Cassette Dimensions
7,000,000 characters
1-10 Features and General Specifications Rev. A
CONFIDENTIAL
Dimensions, Weight, Finish
Dimensions
251 x 298 x 194.5 mm (9.88 x 11.73 x 7.66”) (W x D x H)
Weight
Approx. 5.6 kg (12.3 lbs)
Color
EPSON Standard Gray
Environmental Specifications
Temperature
Operation: 5° to 40°C (41° to 104°F)
Storage: -10° to +50°C (14° to 122°F) (except ribbon)
TM-U950/U950P Technical Manual
Humidity
Operation: 30 to 80% (non-condensing; limit above 30°C: 30°C, 80%)
Storage: 30 to 90% (non-condensing; except ribbon)
Vibration resistance (in standard EPSON packing)
Frequency: 5 to 55 Hz
Acceleration: 2 G
Sweep: 5 minutes (one way)
Time: 1 h
Directions: X, Y, Z
No visible external or internal problems or operation failure after the above vibration test.
Shock resistance (in standard EPSON packing)
❏ With packing
Drop height: 50 cm (19.69”)
Angle: 1 angle, 3 surfaces, 6 sides
No visible external or internal problems or operation failure after the above drop test.
❏ Without packing
Drop height: 5 cm (1.97”)
Angle: 4 sides, one-point support
No damage when dropped while printer is off.
Rev. A Features and General Specifications 1-11
CONFIDENTIAL
Noise
63 dB (operating, measured in ANSI bystander position; printing on receipt and journal paper
roll)
Reliability
Mechanics
MCBF 5,000,000 lines (auto-cutter and stamp once every 15 lines)
Life expectancy 7,500,000 lines (The printer’s life is considered over when the
Life expectancy of print head 150,000,000 characters (average 2 dot/wire/1 character)
MICR reader mechanism (only when the printer is used with the MICR reader):
MCBF: 160,000 passes
printer cannot function due to worn-out main parts such as
motor, solenoids, frames, and shafts.)
Life: 240,000 passes
1 pass: reading characters to printing endorsements on a
U.S. personal check (152 mm (5.98”) long)
The MICR reader is defined to have reached the end of its
life when it cannot function proper ly because of wearing out
of the main parts (magnetic head, head holding roller, etc).
Certifications
Japan: EMI: VCCI Class 1
North America: EMI: FCC Class 1
Safety standards: UL1950-2TH-D3
C-UL
Europe: CE marking (printer with MICR reader under application)
EN55022
EN50082-1
EN45501 (except when connected to IM)
Safety standard: TÜV
1-12 Features and General Specifications Rev. A
CONFIDENTIAL
Hardware Configuration
Main Unit Configuration
Printer mechanism
TM-U950/U950P Technical Manual
Figure 1-12. TM-U950 Printer Mechanism Main Unit Configuration
Electrical circuit and unit on cases
Figure 1-13. TM-U950 Electrical Circuit and Unit on Cases Main Unit Configuration
Rev. A Features and General Specifications 1-13
CONFIDENTIAL
Main Unit Specifications
Paper feed motors
Receipt and journal paper feeding is performed by dedicated feed motors. Slip paper feeding is
performed by using the journal paper feed motor and a journal/slip switching solenoid.
Motor type
4-phase, 48-pole PM type stepping motor
Drive voltage
24 V DC + 10% (including voltage drop caused by drive transistor)
Winding resistance
Journal paper fe ed motor 35 Ω ± 7% at 25°C (77°F), per phase
Receipt paper feed motor: 42 Ω ± 7% at 25°C (77°F), per phase
Current consumption (per motor)
❏ Journal paper fee d motor
Peak current: 1.94A in worst case
Average current: 615 mA at rated speed; 25°C (77°F), 24 V DC, 500 pps
930 mA max. in worst case
Hold current 92.5+42.5 mA per phase at normal hold, 25°C (77°F)
❏ Receipt paper feed motor
Peak current: 1.5 A in worst case
Average current: 510 mA at rated speed; 25°C (77°F), 24 V DC, 500 pps
770 mA max. in worst case
Hold current: Approx. 130 ± 50 mA per phase at normal hold, 25
Drive frequency
500 pps (minimum pulse interval 2.00 ms)
Drive principle
Constant voltage drive, 2-2 phase induction
C (77°F)
°
Carriage motor
Motor type
4-phase, 48-pole PM type stepping motor
1-14 Features and General Specifications Rev. A
CONFIDENTIAL
Drive voltage
24 V DC ± 10% (including voltage drop caused by drive transistor)
Winding resistance
9 Ω ± 7% at 25°C (77°F), per phase
Current consumption (per motor)
Peak current: 1.5 A in worst case
Average current: 550 mA at rated speed
Hold current: 150 mA± 8% per phase
Drive frequency
Standard mode: 1400 pps (pulse interval 714 µs)
Copy mode: 1200 pps (pulse interval 834 µs)
Drive principle
Constant-current chopper drive, 2-2 phase induction
TM-U950/U950P Technical Manual
Carriage feed pitch
0.3386 mm (1/75”) per pulse
Print head unit (print solenoids)
Number of solenoids: 9
Drive voltage: 24 V DC ± 10% (including voltage drop caused by drive
transistor)
DC resistance: 6.65 Ω ± 4% at 25°C (77°F)
Near-end sensors (journal, receipt)
A sensor is provided for the receipt and journal paper roll respectively. The sensors check the
diameter of each roll and activate the near-end alarm when the diameter falls below a userdetermined value.
Sensor type: Microswitch
Voltage: 5 V DC ± 5%
Output level: Low when near-end is detected
Paper roll sensors (journal, receipt) (*)
A sensor is provided in the paper path (receipt and journal side, respectively) of the printer
mechanism. These sensors check for the presence of paper, and accordingly control loading of
the paper roll.
Sensor type: Microswitch
Switch rating: 10 to 100 mA, 5 V DC (resistive load)
Contact condition: On when paper is present
(*) If the paper roll sensor detects the “no paper” condition while the cover is open, semi-
automatic loading can be performed by inserting the paper roll into the paper path.
Rev. A Features and General Specifications 1-15
CONFIDENTIAL
Slip paper insert sensor
This sensor is located in the slip paper loading path to detect the insertion of slip paper.
Sensor type: Photosensor
Voltage: 5 V DC ± 5%
Input current: Approx. 20 mA
Output level: High when slip paper is detected
Slip paper eject sensor
This sensor is located in the slip paper eject pa th to dete ct eje c ti on of slip pape r. If ej ecti on is not
detected, the printer does not proceed to the next step.
Sensor type: Photosensor
Voltage: 5 V DC ± 5%
Cover open sensor (*)
This sensor detects the condition of the printer cover. If the cover is open, the printer
automatically goes off-line after the current printing operation and the carriage returns to the
home position at slow speed. The printer goes back on-line when the cover is closed.
Sensor type: Photosensor
Voltage: 5 V DC ± 5%
Input curr ent: 10 m A
Output level: High when cover open is detected
(*) If the paper roll sensor detects the “no paper” condition while the cover is open, semi-
automatic loading can be performed by inserting the paper roll into the paper path.
Auto-cutter sensor
Sensor type: Mechanical contact sensor
Voltage: 5 V DC ± 5%
Current rating: 0.1 to 0.5 mA
Home position sensor
This sensor detects the carriage initial position (on the receipt paper side) and the carriage
abnormal operation.
Sensor type: Photosensor
Voltage: 5 V DC ± 5%
Output level: High when the carriage home position is detected
Carriage sensor
This sensor outputs signal synchronized with the carriage operation, and detects whether the
carriage operation is abnormal.
Sensor type: Photosensor
Voltage: 5 V DC ± 5%
Output level: High when sensor plate is detected
1-16 Features and General Specifications Rev. A
CONFIDENTIAL
MICR Reader (when the printer is used with the MICR reader)
(Not available for the TM-U950P)
Available fonts: E-13B, CMC7
Recognition rating: 98% or more (at 25
Recognition rating is defined as follows:
Recognition rating (%) =
Check paper used for test is EPSON standard check paper. Checks must be flat, without curls,
folds, or wrinkles.
Connectors
All connectors are located on the rear panel of the printer. (Refer to Figure 1-1.)
TM-U950/U950P Technical Manual
C)
°
Total number of checks - (number of sheets misread
and those not identified)
Total number of checks
× 100
Connector panels
14 25
8
1
1
Customer display
(DM-D) connector
Interface
connector
13
1
Drawer kick-
out connector
Figure 1-14. Rear Panel Connectors
6
2
1
3
Power
connector
Interface connector Drawer kickout Power connector
Interface
See the Interface section in this chapter.
Power supply connector
This connector is for the AC adapter.
Connector type: TCS7960-53-2010 (Hoshiden) or equivalent
Table 1-4. Power Supply Pin Assignment
Pin number Function
1 24 VDC
2 Signal ground
3NC
Shell Frame ground
connector
TM-U950PTM-U950
Note:
Be sure to ground the printer via the frame ground terminal on the metal strip on the rear panel.
Rev. A Features and General Specifications 1-17
CONFIDENTIAL
Drawer kick-out connector (modular connector)
Pulse specified by ESC p command is ou tput to this connect or. The host can confirm the st atus of
the input signal by using the DLE EOT, ESC u, GR r, or GS a (ASB) commands.
Connector type:
Printer side 52065-6615 (Molex) or equivalent
User side 6-position 6-contact (RJ12 telephone jack)
Table 1-5. Drawer Kick-out Connector Pin Assignment
Pin number Signal name I/O
1Frame ground —
2 Drawer kick-out drive signal 1 (*1) O
3 Drawer open/close signal (*2) I
4 + 24 V —
5 Drawer kick-out drive signal 2 (*1) O
6 Signal ground —
(*1) Drawer kick-out drive signal
The signal specified by the ESC p command is output from pins 2 and 5 of the connector.
Output voltage: Approx. 24 V
Output current: 1 A max.
Output waveform: The waveform of the signal at pins 2 and 5 is shown in
Figure 1-15. (The ON time n1 and OFF time n2 are
determined by the ESC p command.)
n1 x 10ms n2 x 10ms
Figure 1-15. Drawer Kick-out Drive Signal Timing
(*2) Drawer open/close signal
The host computer can check the drawer open/close status with the DLE EOT, ESC u, GR r, or
GS a (ASB) commands.
Input signal level (connector pin 3)
Low = 0 to 0.8 V
High = 2 to 5 V
1-18 Features and General Specifications Rev. A
CONFIDENTIAL
Notes
❏
Use a shielded cable for the drawer connection.
❏
It is not possible to drive two drawers at the same time.
❏
Use a solenoid rated for at least 24 Ω as the drawer kick-out solenoid. Otherwise, excessive current
may damage the solenoid.
❏
The drawer must be powered from the printer (connector pin 4).
❏
Do not drive the drawer continuously.
Customer display connector (not supported on the TM-U950P)
This connector is for Epson customer display (DM-D series). Do not connect other customer
displays.
Connector type: Receptacle 52065-8845 (Molex) or equivalent
TM-U950/U950P Technical Manual
Table 1-6. Customer Display Connector Pin Assignment
Pin number Signal name I/O
1Frame ground—
2NC —
3TXD O
4DTR O
5DSRI
6 Signal ground —
7 +24V DC —
8 Power ground —
Interface
Serial interface
Data transfer principle Serial (RS-232 interface)
Synchronization Asynchronous
Handshake (*) DTR/DSR or XON/XOFF
Signal level
MARK: -3 to -15 V (logical “1”/OFF)
SPACE: +3 to +15 V (logical “0”/ON)
(Voltage measured at connector, referenced to SG)
Baud rate (*) 1200, 2400, 4800, 9600 bps
Word length (*) 7 or 8 bit
Rev. A Features and General Specifications 1-19
Loading...