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Epson TM-U950P - B/W Dot-matrix Printer, Technical Manual

The Epson TM-U950P is a reliable and efficient B/W dot-matrix printer suitable for various businesses. Enhance your understanding of its features and functionalities with the comprehensive Operator's Manual provided for free download at manualshive.com. Get the most out of your printer experience by accessing this valuable manual today.

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Rev. A

Troubleshooting   

4-1

TM-U950/U950P Technical Manual

Chapter 4

Troubleshooting

Troubleshooting

Use the following to troubleshoot and repair the printer:

Self-test

Use the self-test to check the operation of the control circuitry and the printer mechanism.

Troubleshooting flowchart

When the source of the problem is not clear, use the flowchart to find and replace a defective 
component.

Troubleshooting tables

Follow the steps outlined in these tables to repair a defect whose symptoms are known.

Self-test

The self test can be performed for paper rolls or for slip paper. Make sure the printer is turned 
off before starting the self-test with either paper type.

Initiating the self-test

Paper roll self-test

1. Insert paper rolls in both receipt and journal sides of the printer, and close the printer cover.

2. Turn on the printer while keeping the RECEIPT FEED button depressed. The self-test starts 

and status information is printed on the receipt paper roll.

Slip paper self test

1. Insert paper rolls in both receipt and journal sides of the printer, and close the printer cover.

Note:

When printing on slip paper, paper rolls should also be inserted in both sides of the printer. This 
prevents paper jams.

2. Turn on the printer while keeping the JOURNAL/SLIP FEED button depressed. The SLIP 

LED flashes.

3. Feed a sheet of slip paper into the printer. The self-test starts, loading the paper 

automatically and then printing status information.

Self-test standby

Paper roll self test

1. When the status information printing is complete, the following is printed:

CONFIDENTIAL

Summary of Contents for TM-U950P - B/W Dot-matrix Printer

Page 1: ...p 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 Complete online documentation for Acr...

Page 2: ...Technical manual TM U950 TM U950P English 4005789 Copied Date 199 Copied by ...

Page 3: ...EPSON SEIKO EPSON CORPORATION Printed in Japan E96010130 0000SE CONFIDENTIAL ...

Page 4: ...e 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 prior written consent of Seiko Epson for some other use 5 Seiko Epson warrants that it has the right to disclose the confidential information SEIKO EPSON MAKES NO OT...

Page 5: ...is 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 expressly approved by the party responsible for compliance could void your authority to operate the equipment FOR CANADIAN USERS This digital apparatus does not exceed the Class A limit...

Page 6: ...ng 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...

Page 7: ...ation 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 CAUTION Cautions must be observed to avoid da...

Page 8: ...iv Rev A Revision Sheet Revision Page Altered Item and Contents Rev A CONFIDENTIAL ...

Page 9: ...cessing 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 Chapter 2 Mechanism Configuration and Operating Principles 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 ...

Page 10: ...cations 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 Assembly 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 Hold...

Page 11: ...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 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 fo...

Page 12: ...able 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 o...

Page 13: ...1 2 Features and General Specifications Rev A Figure 1 1 TM U950 Appearance CONFIDENTIAL ...

Page 14: ... pitch 0 353 mm 1 72 Dot wire diameter 0 29 mm 01 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 Figure 1 2 Dot Configura...

Page 15: ... 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 1 Printing Operation Mode Operation mode Printing speed Head power time impact Standard High Standard Copy Low Copy Low speed Low Standard Table 1 2 CPI CPS CPL Character Size CG Mode Horizontal dots x vertical dots Character Spacing half dots C...

Page 16: ... 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 2 13 9 to 171 lbs 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 Figure 1 3 Character Size CONFIDENTIAL ...

Page 17: ...ss 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 u...

Page 18: ...ons 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 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 pape...

Page 19: ...atures and General Specifications Rev A Print area Paper roll Figure 1 5 Slip Insertion Sensor Position Figure 1 6 Paper Holes and Low Reflection Prohibited Area Figure 1 7 Paper Roll Print Area CONFIDENTIAL ...

Page 20: ...utomatic take up by journal paper feed 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 ...

Page 21: ...ilable 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 Ink Ribbon Ribbon cassette ERC 31 P ERC 31 B Color Purple ERC 31 P Black ERC 31 B Ribbon life 18 dots per character 7 000 000 characters Figure 1 9 Stamp P...

Page 22: ... 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 visibl...

Page 23: ...verage 2 dot wire 1 character MICR reader mechanism only when the printer is used with the MICR reader MCBF 160 000 passes 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 properly because of wearing out of the main parts magnetic head head holding r...

Page 24: ...cal Manual Hardware Configuration Main Unit Configuration Printer mechanism Electrical circuit and unit on cases Figure 1 12 TM U950 Printer Mechanism Main Unit Configuration Figure 1 13 TM U950 Electrical Circuit and Unit on Cases Main Unit Configuration CONFIDENTIAL ...

Page 25: ... feed motor 42 Ω 7 at 25 C 77 F per phase Current consumption per motor Journal paper feed 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 pp...

Page 26: ...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 user determined 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 ...

Page 27: ...t slow speed The printer goes back on line when the cover is closed Sensor type Photosensor Voltage 5 V DC 5 Input current 10 mA 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 ...

Page 28: ...face section in this chapter Power supply connector This connector is for the AC adapter Connector type TCS7960 53 2010 Hoshiden or equivalent Note Be sure to ground the printer via the frame ground terminal on the metal strip on the rear panel Table 1 4 Power Supply Pin Assignment Pin number Function 1 24 VDC 2 Signal ground 3 NC Shell Frame ground Recognition rating Total number of checks number...

Page 29: ... 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 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 Table 1 5...

Page 30: ...n 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 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 connect...

Page 31: ...can be received When an error has occurred During the macro execution switch waiting status Table 1 7 Interface Connector Specifications and Functions Pin number Signal name I O Function 1 FG Frame ground 2 TXD O Transmit data 3 RXD I Receive data 4 RTS O DIP SW1 6 off Same as DTR signal Pin20 DIP SW1 6 on Logical product of DTR signals of DM D and TM if both are SPACE the printer can receive data...

Page 32: ...eady to receive data SPACE indicates ready The signal is always SPACE except in the following two cases o During the interval between power on and the time when the printer is ready to receive data o During the self test 25 INIT I Changing the DIP switch setting enables this signal to be used as a reset signal for the printer The printer is reset when the signal remains SPACE for 1 ms or more Prin...

Page 33: ...sing DLE EOT DLE ENQ and GS ENQ be sure that the receive buffer does not become full a When using a host that cannot transmit data when the printer is busy If an error has occurred DLE EOT DLE ENQ and GS ENQ cannot be used when the printer is busy due to receive buffer full b When using a host that can transmit data when the printer is busy When the receive buffer becomes full while transmitting d...

Page 34: ... The STATUS data transmission from the printer to the host is accomplished in the Nibble or Byte mode This mode allows data transmission from the asynchronous printer under the control of the host Data transmission in the Nibble mode are made via the existing control lines in units of four bits Nibble In the Byte mode data transmission is accomplished by making the 8 bits data lines bidirectional ...

Page 35: ...LSB 3 Host Printer Data1 Data1 Data1 4 Host Printer Data2 Data2 Data2 5 Host Printer Data3 Data3 Data3 6 Host Printer Data4 Data4 Data4 7 Host Printer Data5 Data5 Data5 8 Host Printer Data6 Data6 Data6 9 Host Printer Data7 MSB Data7 MSB Data7 MSB 10 Printer nAck PtrClk PtrClk 11 Printer Busy PtrBusy Data3 7 PtrBusy 12 Printer PError AckDataReq Data2 6 AckDataReq 13 Printer Select Xflag Data1 5 Xfl...

Page 36: ...on reverse idle mode When this state is not available the host should enter the reverse mode to always monitor the presence of data When ASB is used preference should be given to the ASB status for transmission over the other status signals Any accumulated ASB status signals left for transmission from the last to the newest ASB status transmission should be transmitted together at one time as one ...

Page 37: ...aking with the printer be sure to check the printer status using the GS a command and the ASB function In this setting the default value of n for GS a is 2 The printer automatically transmits the printer status depending on on line off line changes When using DLE EOT DLE ENQ and GS ENQ be sure that the receive buffer does not become full When using a host that cannot transmit data when the printer...

Page 38: ...e based on the line spacing set by ESC 2 and ESC 3 If this button is held down the printer feed paper continuously The paper is fed after the carriage is moved to the center of the receipt paper roll JOURNAL SLIP FEED button Type Non locking push button Function If this button is pushed once and released the printer feeds journal paper for one line based on the line spacing set by ESC 2 and ESC 3 ...

Page 39: ...ed on the printer may be reset depending on the signal state DIP switches should not be operated while the printer power is turned on Table 1 9 DIP Switch Bank 1 Switch number Function ON OFF 1 Data word length 7 bit 8 bit 2 Parity check Yes No 3 Parity type Even Odd 4 Data transfer rate Transfer rate bps 4 5 5 1200 On On 2400 Off On 4800 On Off 9600 Off Off 6 Connection of customer display Connec...

Page 40: ...itch number Function ON OFF 1 Undefined 2 Undefined 3 Undefined 4 Undefined 5 Undefined 6 Internal use Fixed 7 Undefined 8 Undefined Table 1 10a DIP Switch Bank 2 Switch number Function ON OFF 1 Auto line feed Always enabled Always disabled 2 Receiver buffer 32 bytes 2048 bytes 3 Font selection default 9x9 7x9 4 Carriage moving speed default for paper roll printing Low High 5 Handshaking BUSY cond...

Page 41: ...Off Normal operation Flashing An error has occurred See Error Types and Countermeasures on page 4 23 RECEIPT OUT LED red On Near end condition or paper end is detected for paper roll at receipt side Off Paper roll at receipt side is sufficient Flashing Stand by for test printing JOURNAL OUT LED red On Near end condition or paper end is detected for paper roll at journal side Off Paper roll at jour...

Page 42: ...rom a recoverable error the printer ejects the remaining slip paper and repeats the loading process When recovering from a slip paper eject error the printer ejects the paper but does not repeat loading When the printer recovers from an error using DLE ENQ 2 while slip paper is selected the printer first ejects the slip then goes to 2 sheet mode When an unrecoverable error 2 has occurred turn off ...

Page 43: ...4 Hexadecimal Dumping Hexadecimal dumping function This function prints the data transmitted from the host computer in hexadecimal numbers and in its corresponding characters Starting hexadecimal dumping Open the cover and turn the power on while pressing the RECEIPT FEED button then close the cover The printer first prints Hexadecimal Dump on the paper roll and prints the received print data in h...

Page 44: ...f the sensors are selected by ESC c 4 Therefore use the near end sensors to detect the paper roll end When stop printing is selected Two sheet mode When the no paper condition is detected the printer automatically goes off line To resume printing close the cover after inserting a new paper roll Slip paper mode When the no paper condition is detected the printer continues to print on the printable ...

Page 45: ...rican model 2 0 A Japanese and European model If the adapter is not connected to a DC load of 2 0 A or less during power on the voltage will not build up sufficiently for operation Rated output power Approx 48 W Output peak current 6 A within 10 ms Compliance to safety regulations UL CSA TÜV Dimensions and weight Dimensions 86 x 166 x 44 mm 3 39 x 6 54 x 1 73 W x D x H without protruding parts Wei...

Page 46: ...m Components The TM U950 impact dot matrix printer consists of the following eight components Printing assembly Sensor assembly Paper feed assembly Slip paper assembly Ribbon feed assembly Stamp assembly for printers with a stamp assembly Auto cutter assembly Paper roll take up assembly These components are described in detail in the following sections CONFIDENTIAL ...

Page 47: ...arriage motor is driven the gear wheel turns in the direction indicated by the arrow and the carriage feed pulley and carriage drive belt transmit the driving force so that the head carriage fastened to the carriage drive belt moves in the direction of the arrow When the carriage motor turns in the direction indicated by the arrow the head carriage moves in the direction of the arrow Figure 2 1 Pr...

Page 48: ...tion 2 The pushed out dot wire contacts the platen via the ink ribbon and paper so that one dot is printed 3 The drive coil current is cut causing the dot wire and lever plate to return to their original positions due to the spring action of the wire and the plate Forming a character 9 x 9 dot matrix The carriage motor phase switching signal serves as a reference signal for powering the print sole...

Page 49: ...functions of the TM U950 and TM U950P are as follows The near end sensor is mounted on the case at the paper feed section Sensor Assembly Function Home position sensor assembly Initial TM U950 TM U950P setting Carriage sensor assembly Detection of head carriage operation problems Auto cutter sensor assembly Auto cutter stroke detection Slip paper insert sensor assembly Slip paper presence detectio...

Page 50: ... head carriage to determine the position of the head carriage and any possible malfunction The home position sensor assembly consists of an LED and a photo IC When the head carriage moves the sensor plate passes between the LED and the photo IC therefore blocking the light from the LED and causing a change in the output level of the photo IC This change is used to generate the head carriage positi...

Page 51: ... and causing a change in the output level of the photo IC This change is used to generate the carriage motor rotation signal Auto cutter sensor assembly The auto cutter sensor assembly uses the brush contact principle and consists of the cutter slider assembly and a contact pin holder sub assembly This sub assembly carries three contact pins for ground reset signal and full cut partial cut F P pos...

Page 52: ...sembly is mounted on the right side of the slip paper eject slot It detects whether or not the paper has been properly ejected after printing The sensor sub assembly uses an LED and photo transistor arrangement to detect light reflected by the paper Since the photo transistor is also subject to external light the light of the LED is modulated by turning it on and off with a 2 kHz pulse The output ...

Page 53: ...assembly consists of the near end sensor lever and a microswitch This assembly is mounted on the right and left sides of the lower case paper feed section and detects the remaining amount of paper on the paper roll The tip of the near end sensor lever is pressed against the side of the paper roll by the internal spring pressure of the microswitch Therefore when the paper roll is full the lever con...

Page 54: ... feed rollers and the auxiliary paper feed rollers are driven by the journal and receipt paper feed motors via the J S switching gear paper feed reduction gear journal transmission gear and receipt transmission gear Immediately before the paper roll insertion point there is the auxiliary paper feed rollers driven by the journal and receipt paper feed motors When paper from the paper roll is handfe...

Page 55: ...d paper on the paper roll is fed in from the paper feed roller The paper feed roller shaft in the paper feed roller assembly is equipped with a gear that is driven by the journal paper feed motor via the J S switching gear paper feed reduction gear paper feed transmission gear and journal transmission gear By driving the journal paper feed motor as described above the journal side paper feed rolle...

Page 56: ...nt contact with the paper holder roller shaft When the levers are moved in the direction shown in Figure 2 19 the paper holder roller moves the link with the paper feed roller is released and the paper can be removed As indicated by the solid line in Figure 2 19 the release lever is linked to the paper holder roller shaft at both sides in order not to disturb the paper feed roller and paper holder...

Page 57: ... in Figure 2 19 When section A of the release lever is not pushed farther the paper holder spring returns the lever to the original position Slip Paper Assembly The slip paper assembly consists of the parts shown in Figure 2 20 Figure 2 19 Paper Release Operation Figure 2 20 Slip Paper Feed Assembly CONFIDENTIAL ...

Page 58: ... to move in the direction The roller of the auxiliary slip paper feed roller is pushed up against the auxiliary slip paper holder roller The auxiliary slip paper feed shaft lever moves the form stopper in the direction thus opening the slip paper path and completing the preparations for slip paper feeding Figure 2 21 The journal paper feed motor now rotates a certain number of steps depending on t...

Page 59: ...2 14 Mechanism Configuration and Operating Principles Rev A Figure 2 22 Slip Paper Positioning 2 Figure 2 23 Slip Paper Positioning 3 CONFIDENTIAL ...

Page 60: ...tching gear moved by the J S switching solenoid to the slip paper feed gear train paper feed reduction gear slip paper feed roller and gear of auxiliary slip paper feed roller Since the driving force of the journal paper feed motor is transmitted via the gear train to the slip paper feed roller and the slip paper holder roller the slip paper is controlled from both sides For forward feed each gear...

Page 61: ...e specified number of steps from the form stopper to the MICR head assembly At this point the head carriage assembly is moved by the carriage motor assembly the specified number of steps then waits see Figure 2 27 In response to this movement of the head carriage assembly the MICR head holder change lever moves in the direction and the MICR head holder roller is pressed against the MICR head assem...

Page 62: ...this assembly which carries out MICR reading of the check paper backfeeding and reverse side printing is the same as that of the slip feeding assembly The only element which differs from the slip feeding assembly is the speed Figure 2 26 Check Paper Positioning 1 Figure 2 27 Inserting the Check Paper CONFIDENTIAL ...

Page 63: ...auses the ribbon feed planet lever to rotate in the direction and the planet gear moves until it interlocks with the planet gear Since the planet gear is always interlocked with the ribbon feed gear the ribbon feed gear rotates in the direction When the carriage motor gear rotates in the direction the ribbon feed transmission gear rotates in the direction and the planet gears and rotate and move i...

Page 64: ...r The ribbon feed gear is interlocked with the ribbon feed roller and ribbon feed holder roller inside the ribbon cassette thus feeding the ribbon Stamp Assembly for printers with a stamp assembly The optional stamp assembly consists of the parts shown in Figure 2 30 The assembly is installed below the paper inlet on the receipt side h Figure 2 29 Ribbon Feed Operation Figure 2 30 Stamp Assembly C...

Page 65: ...hed to the lever also moves in the direction and is pushed up against the upper paper guide thus stamping the paper When the stamp solenoid goes off the force of the stamp drive lever spring returns the stamp to its original position Auto cutter Assembly The auto cutter assembly consists of the transmission mechanism sensor and cutter For easy maintenance and paper removal this assembly can be com...

Page 66: ...motor rotation is reduced and transmitted to the drive shaft via the reduction gears A and B The gears on the drive shaft then translate the rotary motion into a sliding motion for operation of the cutter slider Cutter mechanism The cutter mechanism consists of the cutter blade frame cutter blade and cutter blade cover The mechanism performs either a full or a partial cut depending on the F P posi...

Page 67: ...n the rear of the cutter slider assembly it moves with the slider and cuts the paper at the slit After the cut is performed the polarity of the cutter motor drive current is reversed so that the reverse motion returns the cutter blade to the home position Full cut operation When the cutter motor is activated while the mechanism is in the home position the reset signal changes from high to low but ...

Page 68: ...t the cutter slider assembly movement stops after a partial cut Paper Roll Take up Assembly This assembly consists of the take up frame journal transmission gear take up belt take up pulley and take up gear It assures stable take up of the paper roll Take up operation When the journal paper feed motor turns the journal paper feed motor gear rotates in the direction and the rotational force is tran...

Page 69: ...he take up belt the take up pulley turns in the direction The take up clutch spring mounted between the take up pulley and take up gear transmits the force to the take up gear and thus to the take up shaft which turns to take up the paper Figure 2 39 Take up Operation CONFIDENTIAL ...

Page 70: ...ns are shown in Figs 2 40 2 41 and 2 42 MICR board for printers with an MICR reader not available for the TM U950P The main board switch board and MICR board on printers with an MICR reader contain the following electrical circuits Figure 2 40 TM U950 Component Connection Chart Figure 2 40a TM U950P Component Connection Chart CN3 CN4 CN1 Host I F DKD PS 150 CNIF1 CN5 CN6 Printer mechanism Power sw...

Page 71: ...ive circuit Solenoid drive circuits Paper feed motor drive circuit Auto cutter control Carriage motor drive circuit Actuator irregular operation protection circuit Mechanism sensor circuits IM 403 405 connection circuit not supported by the TM U950P MICR board on printers with an MICR reader not available on the TM U950P Power supply section eliminates power supply noise Input section protects aga...

Page 72: ...rface circuit parallel Drawer kick out driving circuit Power circuit Address bus Data bus Operation panel and cover sensor circuit Various sensor circuit Various solenoid driving circuit Paper feed motors R J driving circuit Auto cutter driving and sensor circuit Carriage motor circuit Print head driving circuit Irregular operation protection circuit Power switch 5V 24V CN1 EEPROM RAM ROM CPU Gate...

Page 73: ...ncorporates a 512 KB ROM 1 M in printers with an MICR reader which is not available for the TM U950P and 64 KB of RAM The memory map is as shown below Figure 2 42 MICR Board Block Diagram on printers with an MICR reader not available for the TM U950P Figure 2 43 Memory Map CONFIDENTIAL ...

Page 74: ...set circuit for the TM U950P The reset IC M51953BFP monitors the 5 V voltage When the voltage becomes more than 4 5 V the IC releases the reset condition for the CPU and other circuits thus enabling normal printer operation When the interface reset signal nInit 31 is added to the reset circuit more than 50 µs when the host interface is in forward direction transmission I F signal 1284 ACT 36 is lo...

Page 75: ...nd C49 and is supplied as the 5 V output Power supply circuit for the TM U950P The 24 V DC at CN6 is filtered and supplied to the 24 V line and the 5 V regulator circuit The 5 V regulator circuit uses the switching method to convert the 24 V input into a 5 V output The switching regulator IC U9 switches the 24 V DC The voltage is smoothed by L18 D13 and C49 and is supplied as the 5 V output Figure...

Page 76: ...d motor hold H hold 10 P57 DKD_2 O TTL Drawer kick out drive signal 1 L drive 11 P56 DKD_1 O TTL Drawer kick out drive signal 2 L drive 12 P55 AC_2 O TTL Auto cutter motor drive signal 2 13 P54 AC_1 O TTL Auto cutter motor drive signal 1 14 P53 SHB O TTL Slip paper holder solenoid drive signal L drive 15 P52 ER_LED O TTL Error LED drive signal L ON 16 P51 SL_LED O TTL Slip paper LED drive signal L...

Page 77: ...ata signal Bit 4 41 A19 D3 A19 O TTL Address signal Bit 20 D4 I O TTL Data signal Bit 3 42 A18 D2 A18 O TTL Address signal Bit 18 D2 I O TTL Data signal Bit 2 43 A17 D1 A17 O TTL Address signal Bit 17 D1 I O TTL Data signal Bit 1 44 A16 D0 A16 O TTL Address signal Bit 16 D0 I O TTL Data signal Bit 0 45 A15 A15 O TTL Address signal Bit 15 46 A14 A14 O TTL Address signal Bit 14 47 A13 A13 O TTL Addr...

Page 78: ...t board 64 P84 CTS1 O TTL Unused pulled down to Vss 65 P83 IMSD I TTL SD signal output for the IM 403 405 serial interface not used on the TM U950P 66 P82 IMSD I TTL RD signal input from the IM 403 405 serial interface not used on the TM U950P 67 P81 IMDTR_TM O TTL DTR signal output for the IM 403 405 serial interface not used on the TM U950P 68 P80 CTSO O TTL Unused pulled down to Vss 69 Vcc 5V P...

Page 79: ...t 2 PA 0 HEAD 8 O TTL Print head 8 L ON 3 PA 1 HEAD 7 O TTL Print head 7 L ON 4 PA 2 HEAD 6 O TTL Print head 6 L ON 5 PC 6 JN_LED O TTL Print head 5 L ON 6 PA 3 HEAD 5 O TTL Print head 4 L ON 7 PA 4 HEAD 4 O TTL Print head 3 L ON 8 PA 5 HEAD 3 O TTL Print head 2 L ON 9 PA 6 HEAD 2 O TTL Print head 1 L ON 10 PA 7 HEAD 1 O TTL Print head 0 L ON 11 GND GND Power supply 12 PB 0 SW1I I TTL DIP switch b...

Page 80: ...t near end signal 39 PE 2 CJPE I TTL Journal paper end signal 40 PE 3 CRPE I TTL Receipt paper end signal 41 PE 4 PFR_SW I TTL Receipt FEED switch L ON 42 PE 5 PFJ_SW I TTL Journal FEED switch L ON 43 PE 6 COVER I TTL Cover open detection 44 PE 7 DK_S I TTL Drawer status signal 45 PC 7 PC_LED O TTL Receipt LED L ON 46 STRB CLK I TTL Unused connected to GND on TM U950 synchronization clock interrup...

Page 81: ...STB I TTL Address latch enable signal 62 ALB 0 A 16 O TTL Address signal Bit 16 63 ABL 1 A 17 O TTL Address signal Bit 17 64 ABL 2 A 18 O TTL Address signal Bit 18 65 ABL 3 A 19 O TTL Address signal Bit 19 66 ABL 4 N C O TTL Unused open 67 ABL 5 N C O TTL Unused open 68 ABL 6 N C O TTL Unused open 69 ABL 7 N C O TTL Unused open 70 GND GND Power supply 71 GND GND Power supply 72 Vss 5V Power supply...

Page 82: ...DIP switch circuit Parallel to serial conversion of the settings of DIP switch banks 1 and 2 is performed by the conversion IC U10 U17 and the result is input to the gate array port PB0 PB1 DIP switch selection is made by the SWSL signal PB3 The SWCL signal PB2 is used as a clock signal and the switch settings are read one bit at a time Figure 2 46 Operation Panel and Cover Open Sensor Circuits Fi...

Page 83: ... the RXD signal pin 3 of the customer display interface connector CN7 Pins 6 and 25 of the interface connector carry the printer reset signal which is selectable by DIP switch Refer to SW 7 and 8 of switch bank 2 in Table 1 8 DIP switch settings Then select the Seiko Epson customer display by setting DIP switch 6 on the bank 1 to ON When this setting is in effect the RTS signal which is output wil...

Page 84: ...neither the customer display nor the printer DTR signal is SPACE the RTS signal is not SPACE either When DIP switch 6 of the bank 1 is OFF the same signal as the printer s DTR signal is output to the RTS signal Figure 2 48 Host Interface Circuit and Customer Display Interface Circuit CONFIDENTIAL ...

Page 85: ...drives or receives the interface signal Transmission between host has other mode IEEE 1284 Nibble Byte mode which is the reverse directional transmission Drawer kick out circuit The DKD_1 and DKD_2 signals from the CPU set the drawer kick out driver transistors Q7 and Q8 to on they in turn output the drawer open signal The drawer status signal DK_S is input to the gate array allowing the host to c...

Page 86: ...D_COM signal activates the source transistors Q24 Q33 and Q34 to power the solenoids When the source transistors go off the energy stored by the solenoids is dissipated via the flywheel diodes D39 D40 D44 D45 D46 and D47 When the sync transistors go off the solenoid current is cut Figure 2 50 Drawer Kick out Circuit for the TM U950 Figure 2 50a Drawer Kick out Circuit for the TM U950P 1 FG 2 DKD1 ...

Page 87: ...to an error this signal turns the head off The limit time is determined by C20 and R44 and retriggered at the falling edge of the HD_COM signal Head temperature is measured by feeding the voltage divided by the thermistor and R134 to the CPU via the analog port AN1 Figure 2 51 Print Head Timing Chart Figure 2 52 Print Head Drive Circuit CONFIDENTIAL ...

Page 88: ... by the SCB and S J_HL signals Auxiliary slip paper feed solenoid stamp solenoid drive circuit These solenoids are driven by transistors QM5 according the STB and SHB signals from the CPU S J_DR S J_HL Operation L L Drive L H Hold H H Off Figure 2 53 S J Switching Solenoid Drive Circuit Figure 2 54 Auxillary Slip Paper Feed Solenoid Stamp Solenoid Drive Circuit CONFIDENTIAL ...

Page 89: ...nd PFJ2 switching signals from the CPU the paper feed motor is activated The PFJ_HL signal switches the motor between drive and hold During hold Q28 goes off and a current is supplied from the 5 V power supply The same circuit is provided for the receipt side Figure 2 55 Paper Feed Motor Timing Chart Figure 2 56 Paper Feed Motor Drive Circuit CONFIDENTIAL ...

Page 90: ...motor Carriage motor drive circuit The carriage motor is driven by a dedicated constant current IC The CPU issues the mutual switching signals CR_1 and CR_2 and the constant current switching signals CR_HL and CR_NM In response to these signals the IC controls the carriage motor via the OUTA OUTA OUTB and OUTB terminals AC_1 AC_2 Operation L L Off H L Normal L H Reverse H H Brake CR_HL CR_NM Opera...

Page 91: ...2 46 Mechanism Configuration and Operating Principles Rev A Figure 2 58 Carriage Motor Timing Chart Figure 2 59 Carriage Motor Drive Circuit CONFIDENTIAL ...

Page 92: ...signal POW_TRG signal is a trigger for power supply control and the signal is cut when CPU operates abnormally As a result of the cut all the actuator drivers except the print head and the auto cutter are turned off Mechanism sensor circuits All the sensors except the slip paper insert and eject sensors receive signals from the printer mechanism and the signals are input to CPU and gate array via ...

Page 93: ...r 5 Slip paper eject sensor circuit Slip paper eject detection is performed using a reflecting photosensor To prevent errors due to external light 2 kHz frequency modulation is used The SO_K signal light source drive is turned on and off by the CPU in a 2 kHz cycle The SO_E signal light source detection passes a 2 kHz filter and amplifier The CPU then reads the level of this signal CSOE via an ana...

Page 94: ...filings which magnetize the ink When a magnetic field is applied from a certain direction to the magnetic ink characters printed on check paper the characters are magnetized as shown in the diagram below The term magnetic ink is used in this manual but in actuality the characters are read by sending current to a magnetic reading head and forming a magnet Characters magnetized in this way are read ...

Page 95: ...m of the functions of the MICR board The MICR head reading signal and CR DTC signal are output to the CR DTC OUT terminal Switching of these two signals is controlled by the SLIP signal as shown below Note Only the logic for High and Low is shown These are different from the TTL levels SLIP signal CR DTC OUT terminal High CR DTC signal output Low MICR head reading signal output Figure 2 65 Voltage...

Page 96: ...a polyethylene bag with anti rust paper VCI paper and keep it in a dry place Use Precautions Always install a ribbon cassette and load paper before printing If paper runs out be sure to load new paper before resuming printing If printing is executed when there is no paper or no ribbon cassette in the printer the print quality may deteriorate the printing color may become uneven or some dots may no...

Page 97: ...form personal check printing with a paper roll loaded If MICR reading and or printing is performed without a paper roll loaded the check cannot be fed correctly or may be damaged due to paper jams 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 Loading the Paper Rolls 1 Cut the end of the...

Page 98: ...cutter If the paper was not fed far enough press the RECEIPT FEED button to feed additional paper 6 Press the JOURNAL SLIP FEED button to feed an additional 30 cm a foot or so of journal paper 7 Insert the tip of the journal paper into the groove on the take up spool and rotate the spool two or three times to secure the paper Figure 3 4 Inserting Paper into the Paper Inlet Figure 3 5 Inserting the...

Page 99: ...olls 1 If you want to remove the paper roll in the journal paper side cut the journal paper with a pair of scissors or a knife then remove the take up spool Figure 3 6 Installing the Spool and Printer Cover Take up Spool Closing the Printer Cover Figure 3 7 Cutting the Journal Paper Journal paper Take up spool Cut CONFIDENTIAL ...

Page 100: ...y Inserting Slip Paper and Printing on Slip Paper Inserting Slip Paper Note Be sure to install the paper rolls in the printer even if you plan to print only on slip papers This will prevent paper jams You can also prevent paper jams by using only flat paper without wrinkles creases or folds 1 Send ESC c 04 command from the computer so that the printer enters slip paper mode When the printer enters...

Page 101: ...come ink stained Do not insert checks with staples This may cause paper jams MICR reading errors and damage to the MICR head 1 The FS a 0 command is issued to access the MICR mode When the MICR mode is accessed the SLIP LED flashes 2 When the SLIP LED is flashing the personal check paper can be inserted Printing on Slip Paper Step User Operation Printer Operation 1 Transmit ESC f Mechanically swit...

Page 102: ...continues to flash until the paper is removed from the printer 6 The SLIP LED goes out when the personal check paper has been removed Printing on personal check paper when the printer is used with the MICR reader Use the following procedure to read MICR characters Step User Operation Printer Operation 1 Transmit FS a 0 00 H Mechanically switches to MICR mode and waits for a personal check to be lo...

Page 103: ...arts can be set using ESC f To check the MICR function status exactly DLE EOT BS 1 should be used Installing and Removing the Ribbon Cassette Installing the Ribbon Cassette 1 Open the printer cover 2 Turn the ribbon cassette s knob in the direction of the arrow to take up any slack in the ribbon 3 Insert the ribbon cassette in the printer and rotate the cassette s knob five or six more times This ...

Page 104: ...he stamping feature follow the steps below to install the stamp set in the printer 1 Open the printer cover 2 Insert the stamp set into the printer as shown in the figure below Then close the printer cover Note To remove the stamp set pull it out of the printer in the opposite direction of the arrow in the figure above Figure 3 12 Removing the Ribbon Cassette Figure 3 13 Installing the Stamp Set P...

Page 105: ...en the key is turned to the left Note Make sure that you remove the key from the lock before you close the printer cover otherwise the printer cover may be damaged Removing the Jammed Paper To clear a paper jam inside the printer follow the steps below 1 Turn the printer off and open the printer cover 2 If the paper is jammed in the journal paper side cut the journal paper with a pair of scissors ...

Page 106: ...ing a pair of scissors or a knife then remove the paper roll See Figure 3 16 4 If the paper is caught in the cutter blade inside the auto cutter open the cutter blade by rotating the gear in the direction shown in the figure below Figure 3 16 Cutting the Paper Figure 3 17 Opening the Cutter Blade Gear Paper roll CONFIDENTIAL ...

Page 107: ...er unit and lock it by moving both OPEN LOCK levers in the direction marked with LOCK If you encounter difficulty in clearing a paper jam remove the print head cover by loosening the screw on the right side of the cover as shown in the figure below Be careful not to touch the print head unit as it can be very hot after printing continuously for a long time Figure 3 18 Opening the Cutter Unit OPEN ...

Page 108: ...Table 3 1 Periodic Checks Checkpoints Standards Remedies Dust paper particles or dirt on and in the mechanism unit No dust paper particles or dirt should be allowed to build up on or in the mechanism unit No foreign materials should be in the printer Clean the mechanism unit thoroughly with a vacuum cleaner No small pieces of paper should be left in the paper path Remove any pieces of paper from t...

Page 109: ...rication Standards When lubricating parts during assembly and disassembly of the printer clean the parts before lubricating them If lubricant is wiped off during cleaning or disassembly or parts replacement is performed be sure to lubricate the appropriate points even if it is not yet time for the periodic lubrication Lubricants The performance and life of the printer is greatly affected by the lu...

Page 110: ...ion gear A G 36 14 Cutter slider contact portion of frame cutter blade receiving assembly G 36 15 Circuit pattern on cutter slider assembly G 20 16 Shaft of pulley base carriage transmission assembly G 36 17 Oil ring O 2 18 Two shafts of frame carriage assembly G 15 19 Carriage catching surface above of frame carriage assembly five G 19 20 Carriage catching whole surface below of frame carriage as...

Page 111: ...7 Shaft of cutter motor mount plate sub assembly G 36 8 Bigger wheel of deceleration gear A G 36 9 Two holes of each paper hold roller G 36 10 Two shafts of cutter frame sub assembly G 36 11 Center wheel of cutter drive shaft sub assembly G 36 12 Both wheel of deceleration gear B G 36 13 Bigger wheel of deceleration gear A G 36 14 Cutter slider contact portion of frame cutter blade receiving assem...

Page 112: ...mbly mounting two U cut notches of frame main assembly G 15 37 Gear of roller slip paper feed assembly G 36 38 Paper feed deceleration gear G 36 39 Receipt transmission gear G 36 40 Notch of J S changeover gear G 36 41 Paper feed deceleration gear G 36 42 Bigger wheel gear of gear journal transmission G 36 43 Two axles of roller MICR head holder G 36 44 Notch in sleeve of roller MICR head holder G...

Page 113: ...d for Checking and Assembling the Printer Name Standard Tester DC voltage resistance Oscilloscope 50 Mhz with storage Spring scale 2 Kg 4 4 lb Table 3 6 Lubricants for the Printer Type Name Quantity Commercial Availability Grease G 15 40 gr E Grease G19 40 gr E Grease G 20 40 gr E Grease G 36 40 gr E Oil O 2 40 gr E CONFIDENTIAL ...

Page 114: ...lf test Paper roll self test 1 Insert paper rolls in both receipt and journal sides of the printer and close the printer cover 2 Turn on the printer while keeping the RECEIPT FEED button depressed The self test starts and status information is printed on the receipt paper roll Slip paper self test 1 Insert paper rolls in both receipt and journal sides of the printer and close the printer cover Not...

Page 115: ... indicate the standby condition 2 Press the RECEIPT FEED button to continue self test Slip paper self test When the status information printing is complete the slip paper is ejected and the printer waits for insertion of the next sheet SLIP LED flashes To continue the self test continue to feed slip paper into the printer CONFIDENTIAL ...

Page 116: ...l Manual Ending the self test both paper roll and slip paper The printer prints completed and ends the self test The printer automatically becomes ready to receive data after the self test Figure 4 1 Paper Roll Self test Printing Example CONFIDENTIAL ...

Page 117: ...e source of a problem is not clear use the flowchart below to find and replace a defective component Normally servicing should be performed by component replacement Repairs of the PCBs and other components should be performed only by technicians CONFIDENTIAL ...

Page 118: ...Rev A Troubleshooting 4 5 TM U950 U950P Technical Manual Replace fuse F1 see page 4 22 CONFIDENTIAL ...

Page 119: ...4 6 Troubleshooting Rev A CONFIDENTIAL ...

Page 120: ...Rev A Troubleshooting 4 7 TM U950 U950P Technical Manual Take the steps described in Error Types and Countermeasures CONFIDENTIAL ...

Page 121: ...4 8 Troubleshooting Rev A CONFIDENTIAL ...

Page 122: ...Rev A Troubleshooting 4 9 TM U950 U950P Technical Manual Data from host is not printed normally for the TM U950 CONFIDENTIAL ...

Page 123: ...the cable Connect the board firmly Replace the I F circuit board OK OK OK Does Is interface End End End No No No No No No Yes Yes Yes Yes Yes Data from host is not printed normally for the TM U950P Yes cable match specification interface cable broken OK End Replace the printer mechanism assembly OK End No Check the host No CONFIDENTIAL ...

Page 124: ...Rev A Troubleshooting 4 11 TM U950 U950P Technical Manual End End CONFIDENTIAL ...

Page 125: ...tom that can be verified Probable Cause This is a listing of one or several possible causes that should be examined Level Level A The problem can be corrected by persons who are familiar with the printer and have general knowledge but special technical skills are not required Level B The problem requires thorough knowledge and familiarity with the printer that should be checked Checkpoint These ar...

Page 126: ...ission belt A Check tension of carriage transmission belt Nominal value 190 10g 42 022 lbs Adjust the tension as described in the adjustment section of Chapter 5 Detector H P sub assembly failure B Use an oscilloscope to check the detector output signal when the carriage head passes the detector Replace the detector H P sub assembly Carriage head vibrates emits an unusual sound and becomes error a...

Page 127: ...Check common wire for continuity Replace print head unit Wire break or bad solder somewhere on the line between print head unit and connector B Check common wire for continuity Resolder parts or replace wire break parts Platen gap is not adjusted correctly A Check platen gap Nominal value 0 50 0 05 mm 020 0020 Adjust the gap as described in the adjustment section in Chapter 5 Input pulse irregular...

Page 128: ... Check whether paper roll corresponds to specifications Use paper roll that corresponds to specifications A Check paper roll path for obstacles Remove any obstacles and repair paper roll path as required Roller paper feed wear B Check surface of roller paper feed for wear and damage Replace roller paper feed assembly Gear wheel wear B Check gear wheels for wear and damage Replace gear wheels as re...

Page 129: ...that corresponds to specifications Slip paper was improperly inserted A Check whether slip paper is properly aligned with guide portion of paper guide slip lower Insert slip paper aligning with guide portion Obstacle in paper path inside printer A Check paper path in printer for obstacles Remove any obstacles J S changeover solenoid or sub slip paper feed solenoid drive signal failure B Check driv...

Page 130: ...as described in the Adjustment Section of Chapter 5 Roller slip paper feed and roller slip paper hold are defective or contaminated A Check surface of roller slip paper feed and roller slip paper hold for wear or foreign matter Replace or clean roller slip paper feed assembly and roller slip paper hold assembly Wear or damage on J S changeover gear paper feed deceleration gear or gear of roller su...

Page 131: ...paper feed assembly Paper sub hold roller wear or damage B Check surface and core of sub paper hold roller for wear and damage Replace sub paper hold roller Insufficient lubrication of friction lever in roller sub paper feed assembly B Check lubrication condition and wear Lubricate as required or replace roller sub paper feed assembly Gear wheel wear or damage B Check gear wheels for wear and dama...

Page 132: ...amage B Check paper take up pulley for wear and damage Replace paper take up pulley Gear wheel wear or damage B Check gear wheels for wear and damage Replace gear wheels as required Paper take up belt is dislodged worn or extended A Check seating wear and extension condition of paper take up belt Position belt properly or replace belt Cutter motor does not operate when cutting command is given Cut...

Page 133: ... does not detect it Detector slip paper insertion sub assembly failure B Insert paper and check detector output signal with an oscilloscope Replace detector slip paper insertion sub assembly Slip paper problem A Check whether slip paper corresponds to specifications Use slip paper that corresponds to specifications EEPROM U20 failure B Check EEPROM U20 output signal Replace EEPROM U20 Slip paper e...

Page 134: ...reak in solenoid stamp B Check solenoid stamp coil resistance Nominal value for 25 C 19Ω 10 Replace solenoid stamp Stamp drive signal failure B Check stamp drive signal Repair drive circuit Different character than input code is printed Receiver or drive IC U3 failure B Check IC U3 output Replace IC U3 Characters are not displayed normally on the customer display that is connected to DM connector ...

Page 135: ...sread The paper is processed normally Dirty carriage head A Clean the carriage head using cleaning paper Clean the MICR head Deformation of check paper or magnetic ink characters do not conform to standard A Check to see if the check paper is mis shapen or if there is any bleeding protrusion or missing lines in the magnetic ink characters on the check paper Replace the check paper Carriage head ma...

Page 136: ...ollow the steps below to replace the print head unit 1 Turn the printer off 2 Disconnect the external power supply unit 3 Disassemble the printer following the procedure described in Replacing the Print Head Unit in Chapter 5 4 Replace the print head unit 5 Perform gap adjustment referring to page 5 58 6 Perform steps 1 through 3 in reverse Cutter Blade Replacement Follow the steps below to replac...

Page 137: ...d Action 1 2 High voltage error Power supply voltage is too high Action 2 3 Low voltage error Power supply voltage is too low Action 2 4 CPU execution error CPU is trying to execute an invalid address Action 1 5 Thermistor error Print head temperature is abnormal Action 1 6 Auto cutter error Auto cutter does not operate properly Action 3 7 Home position detection error Home position could not be d...

Page 138: ...Rev A Troubleshooting 4 25 TM U950 U950P Technical Manual Action 1 Action 3 CONFIDENTIAL ...

Page 139: ...g screw CBT B Cross recessed Binding head self tapping screw without fluted class 2 CCS tite Cross recessed Cup head S tite self tapping screw CCS tite F Cross recessed Cup head S tite self tapping screw with flat end CPS tite Cross recessed Pan head S tite self tapping screw CPS tite O Cross recessed Pan head S tite self tapping screw with Outside toothed lock washer CPS tite P2 Cross recessed Pa...

Page 140: ...replacing the following two parts Print head unit Cutter blade For other disassembly procedures see Printer Mechanism Assembly and Whole Unit Assembly in this chapter The disassembly procedures are basically the reverse of the assembly steps described in these sections Head top Head side Body Washer assembled CONFIDENTIAL ...

Page 141: ... 5 3 TM U950 U950P Technical Manual Replacing the Print Head Unit 1 Open the cover main assembly 2 Remove the cover head assembly 3 Remove the cover carriage assembly Cover main assembly Cover head assembly Cover carriage assembly CONFIDENTIAL ...

Page 142: ... from the print head unit 5 Disconnect the FPC from the connector on the board head relay assembly Adjustment After replacing the print head unit adjust the print head and platen gap as described in Adjustment F in this chapter Board head relay assembly CONFIDENTIAL ...

Page 143: ...Open the cover main assembly 2 Remove the screws from the cover cutter blade receiving assembly and replace the cover Adjustment Make sure to perform the cutter blade play after the replacement See Adjustment A in this chapter Art To Come Cover cutter blade receiving assembly Cover main assembly CONFIDENTIAL ...

Page 144: ... An asterisk after a step number such as 2 indicates that lubrication must be performed Lubricants should be applied when assembling the parts since it is difficult to do so afterwards Perform lubrication by referring to the lubrication section at the end of Chapter 6 For adjustments follow the descriptions in the Adjustments sections in this chapter Whenever disassembly is performed even for just...

Page 145: ...sub assembly and detector paper R sub assembly to the holder paper detector 2 Dress the wires as shown in the illustration Do not mix up the J and R paper detectors Detector paper J sub assembly brown wire Detector paper R sub assembly pink wire Holder paper detector Detector paper J sub assembly Detector paper R sub assembly Holder paper detector CONFIDENTIAL ...

Page 146: ...Upper Unit Assembly 1 Attach both paper sensor levels to the paper guide upper 2 Fit hook of the detector paper assembly into hole and move it in the direction to lock 3 Dress the wires of the paper sensors as shown in the illustration a b Detector paper assembly CONFIDENTIAL ...

Page 147: ...r paper feed assembly on the paper guide upper Move the crank shafts near the gear into its set position and fasten it with the RE 8 Align holder on the cover paper feed with dowel on the paper guide upper and push the parts together 9 Mount the spring platen 10 Secure the platen assembly to the paper guide upper with the screws Checkpoints Make sure that bend on the cover paper feed matches the c...

Page 148: ...o the shaft guide roller and push the shaft into the paper guide lower 2 Pass the sub paper hold rollers onto the paper hold springs 3 Insert sides of the paper hold springs into the groove on the paper guide lower and press the other end to fasten Checkpoint Make sure that the sub paper hold springs are not bent a CONFIDENTIAL ...

Page 149: ...utout on the iron core and secure the lever with the spring pin 6 Mount the resulting part onto shaft so that tab of the lever stamp drive enters the lever stamp hole 7 Align hole of the solenoid stamp with dowel of the paper guide lower and secure it with the screw 8 Hook the spring stamp drive lever between hooks and Checkpoint Make sure that the lever stamp moves smoothly b c f d e g h i j Pape...

Page 150: ... sub assembly Turn it in the direction and secure it with the screws 3 Mount the deceleration gear A and fasten it with the RE Sub assembly E Roller Paper Hold Assembly 1 Mount the paper hold rollers onto the paper guide assist 2 Pass the shaft paper hold roller through the guides paper assist and the paper hold rollers 3 Clip the C rings onto the grooves on the shaft paper hold roller Cutter moto...

Page 151: ... Then attach the RE 3 Attach the deceleration gear B to the cutter frame sub assembly shaft 4 Attach the deceleration gear A to the cutter frame sub assembly shaft 5 Mount the auxiliary plate to the cutter frame sub assembly shaft and secure it with the RE Sub assembly G Detector Slip Ejection Assembly 1 Push the detector slip ejection sub assembly into the holder slip ejection a b Cutter drive sh...

Page 152: ... hole and fasten the cutter motor mount plate assembly to the frame cutter blade receiving assembly with the screws 4 Align the dowel with the dowel hole and fasten the cutter frame assembly to the frame cutter blade receiving assembly with the screws 5 Align hole with tab and attach the lever release R 6 Attach the lever release J in the same way 7 Engage the paper hold springs in hooks and a b c...

Page 153: ...de assembly 11 Fasten the cover cutter blade receiving assembly to the frame cutter blade receiving assembly with the screws 12 Pass the leaf springs onto the shaft mount cutter unit lock levers R and J and fasten them with REs 13 Align hole with tab on the detector slip ejection assembly and tighten the screws Checkpoint Make sure that the roller paper hold assembly and the leaf springs are mount...

Page 154: ...ctive onto the lead wires 17 Solder lead wires Q R and S to the contact pin holder terminals 18 Pass lead wires through the protective tube 19 Dress the lead wires of the detector slip ejection assembly as shown in the illustration Checkpoint Make sure not to mix up the lead wire colors Adjustment See auto cutter blade play adjustment A on page 5 30 Detector slip ejection assembly Contact pin hold...

Page 155: ...mbly J Carriage Head Assembly 1 Mount the oil rings on the carriage head sub assembly 2 Align the ribbed section of the carriage transmission belt with the ribbed section on the carriage head and mount the belt 3 Insert the spring carriage hold into slot of the carriage head depress tab with tweezers by inserting the tip into hole and then push the spring to insert it to the end so that it is fixe...

Page 156: ... Holder Assembly for printers with a MICR reader 1 Pass the shaft through the MICR head holder as shown below Checkpoint Make sure the spring head open and the shaft MICR head holder are facing the correct direction 2 Secure the shaft MICR head holder with the two RE fittings CONFIDENTIAL ...

Page 157: ...nual Sub assembly K 3 Fit the two springs into the three locations shown below 4 Pass the belt MICR feed through the roller MICR head holder Checkpoint See the illustration below when lubricating the roller MICR head holder Be sure that the correct grease is used CONFIDENTIAL ...

Page 158: ...nd of the spring MICR head holder in the groove in the sleeve of the roller MICR head holder Checkpoint Be careful that the sleeve is facing the right direction 6 Set the roller MICR head holder on the lever MICR head holder as shown below and secure it with the RE fittings Lever MICR head holder CONFIDENTIAL ...

Page 159: ...Adjustments 5 21 TM U950 U950P Technical Manual Sub assembly K 7 Fit the paper dust cover onto the shaft MICR head holder Checkpoint Fit the paper dust cover between the P W and the frame MICR head holder as shown below CONFIDENTIAL ...

Page 160: ...tion along guides and and fasten it with the screw 3 Mount the gears in the order to in the illustration and fasten them with the REs 4 Attach the lever ribbon feed planet assembly so that the section encloses shaft Adjustment Backlash adjustment of carriage feed pulley and carriage motor see Adjustment B on page 5 54 a b Frame carriage assembly Board head relay assembly 1 6 c d Frame carriage ass...

Page 161: ...he shaft carriage guide through the carriage head assembly and then through the frame carriage assembly from side Then tighten screw in the illustration The spring carriage hold must come below the frame and lock with the frame at section of the carriage 9 Engage the belt of the carriage head assembly on the pulley carriage transmission and the carriage feed pulley 10 Engage the belt slip paper fe...

Page 162: ...nsmission Mount the print shaft holders and roller sub slip paper hold assembly and fasten with the RE 14 Pass the wires through the frame carriage assembly attach the detector H P sub assembly to the frame and tighten the screw Roller sub slip paper hold assembly Detector H P sub assembly Frame carriage assembly CONFIDENTIAL ...

Page 163: ...wn in the illustration Then tighten the screw 16 Engage the FPC on the cable clasp Mount the guide nose onto the print head unit and then attach them and tighten the screw 17 Plug the FPC into the board head relay assembly Checkpoint Verify that the FPC is not deformed Verify that the print head unit is in contact with the ground plate Detector carriage sub assembly Carriage head assembly CONFIDEN...

Page 164: ... L 1 18 Assemble all cables at section 19 Mount the paper guide slip upper on the frame carriage assembly so that the three dowels match the respective dowel holes and the hook is engaged in the catch Then tighten the screw j Frame carriage assembly CONFIDENTIAL ...

Page 165: ... 2 Frame Carriage Unit Assembly for printers with a MICR reader 1 As shown below attach the lever MICR head holder change to the frame carriage assembly and secure it with the RE fittings Checkpoint Refer to the illustration below when lubricating the lever MICR head holder change CONFIDENTIAL ...

Page 166: ...MICR head holder assembly to the frame carriage assembly and secure it with the two screws Checkpoints Make sure the two dowels of the MICR head holder assembly are inserted in the two holes in the frame carriage assembly 3 Attach the spring head holder change lever as shown below CONFIDENTIAL ...

Page 167: ...n along guides and and fasten it with the screw 6 Mount the gears in the order to in the illustration and fasten them with the REs 7 Attach the lever ribbon feed planet assembly so that the section encloses shaft Adjustment Backlash adjustment of carriage feed pulley and carriage motor see Adjustment B on page 5 54 a b Frame carriage assembly 1 6 c d Frame carriage assembly Lever ribbon feed plane...

Page 168: ...rst insert it into the hole in the frame carriage assembly and tighten the screw marked in the illustration Checkpoint When attaching the assembly the spring carriage holder should be under the frame with the part marked cutting into the frame 14 Fit the belt of the carriage head assembly onto the pulley carriage transmission and carriage feed pulley 15 Fit the belt slip paper feed onto the roller...

Page 169: ...ly Assembly and Adjustments 5 31 TM U950 U950P Technical Manual Sub assembly L 2 Frame carriage assembly Carriage head assembly Roller slip paper hold assembly B Pulley base carriage transmission assembly CONFIDENTIAL ...

Page 170: ... 2 20 Attach the tension pulley to the lever slip tension and fix it with the RE 21 Attach the lever to the frame carriage assembly and secure it with the screw 22 Attach the pulley slip tension to the frame carriage assembly and secure it with the RE CONFIDENTIAL ...

Page 171: ... through the frame carriage assembly attach the detector H P sub assembly to the frame and tighten the screw 25 Mount the detector carriage sub assembly so that it is flush with the round dowel and long dowel as shown in the illustration Then tighten the screw Belt slip paper feed Print shaft holder Pulley carriage transmission Roller sub slip paper hold assembly Print shaft holder Detector H P su...

Page 172: ...rd head relay assembly Checkpoints Verify that the FPC is not deformed Verify that the print head unit is in contact with the ground plate 28 Assemble all cables at section 29 Mount the paper guide slip upper B on the frame carriage assembly so that the three dowels match the respective dowel holes and the hook is engaged in the catch Then tighten the screw Carriage head assembly j Frame carriage ...

Page 173: ...t is aligned with dowel 3 Attach the form stopper to the frame inner so that the cut face of section contacts tab 4 Align the hole on the solenoid sub slip paper feed with the dowel of the frame inner and fasten the solenoid with the screw 5 Attach the spring form stopper Checkpoints Verify that the form stopper moves smoothly when the lever sub slip paper feed shaft is moved Verify that the cut f...

Page 174: ...bly O Solenoid J S Changeover Assembly 1 Attach the J S changeover solenoid to the J S changeover solenoid mount plate and tighten the screw 2 Align the U shaped groove of the lever J S changeover with the groove on the side of the J S changeover solenoid and attach the lever by joining sections and 3 Engage the J S changeover lever spring Detector slip insertion sub assembly a b CONFIDENTIAL ...

Page 175: ...older plate into the paper guide slip lower or lower B so that the dowels match the five holes Checkpoint Verify that the paper hold plate is not deformed The procedure below is carried out only when the printer is equipped with a MICR reader 2 Attach the MICR head to the paper guide slip lower B 3 Pressing the MICR head against the parts marked and in the following illustration secure it with the...

Page 176: ... Take up Assembly 1 Mount the paper take up spring on the paper take up gear 2 Attach the paper take up pulley to the paper take up gear 3 Attach the above assembly to the frame paper take up sub assembly and fasten it with the RE Frame paper take up sub assembly CONFIDENTIAL ...

Page 177: ...CR reader 1 With the leaf spring positioned as shown below set the spring on the motor paper guide J and then attach the shield plate upper and the shield plate lower 2 Secure the shield plate upper to the shield plate lower using the two screws Checkpoint Make sure the two dowels in the shield plate upper match the holes in the shield plate lower CONFIDENTIAL ...

Page 178: ...lip feed roller for printers with a MICR reader in groove mount the roller slip paper feed assembly on the holder and fasten it with the RE 5 Mount the detector slip paper insertion assembly and fasten it with the screw Checkpoints Make sure not to mix up the paper feed motors Make sure that section on the frame inner is properly seated For the details see the Checkpoint on page 5 35 a b c Detecto...

Page 179: ...ws 4 Fit the shaft holder slip feed roller into the groove attach the roller slip paper feed assembly and secure it with the RE fittings 5 Mount the detector slip paper insertion assembly and fasten it with the screw Checkpoints Be careful that the motor paper feed J and R assemblies are attached correctly Make sure that section on the frame inner is properly seated For details see the Checkpoint ...

Page 180: ... and Upper Paper Guide Unit 1 Slide the rectangular section of the paper guide lower unit into the frame main assembly and fasten the screw 2 Align sections of the paper guide upper unit with sections of the frame main assembly and fasten the screws b a Frame main assembly CONFIDENTIAL ...

Page 181: ...haped grooves of the frame main assembly 2 Align the dowel and dowel hole of the paper guide slip lower assembly and engage hook of the frame main in cutout of the paper guide Then slide the paper guide into place and fasten it with the screw 3 If the printer has a MICR reader the cable for the MICR board will be coming out of the section marked a b c Paper guide slip lower assembly Roller sub sli...

Page 182: ...fasten with the RE 2 Align the tip of the lever J S changeover with the groove on the J S changeover gear Align the hole on the lever with the dowel on the frame main assembly and secure the solenoid J S changeover assembly with the screw 3 Mount the paper feed deceleration gear and then the gear journal transmission on the frame main assembly and fasten with the RE Frame main assembly Solenoid J ...

Page 183: ...tside 4 Thread the wiring from the detector slip ejection assembly through clasp 5 Thread the cutter motor wiring through cutout and then along groove The two protective tubes should not protrude from cutout 6 Mount the auto cutter unit on the frame main sassembly and engage the cutter unit shaft springs J and R Secure it with the RE Checkpoint Make sure that the spring cutter unit shaft J is not ...

Page 184: ...he frame rear to the frame main assembly and secure it with the screw 3 Pass the connector assembly N E detector J through hole and then hole 4 Pass the connector assembly N E detector R through hole and then hole Checkpoint Make sure not to mix up the J and R connector cables a b c d Connector assembly N E detector J orange cable Connector assembly N E detector R purple cable CONFIDENTIAL ...

Page 185: ...al Main Assembly 1 7 Attachment of Frame Carriage Unit 1 Pass the lead wires through hole 2 Mount the frame carriage unit on the frame main assembly and tighten the screws provisionally Final tightening is done in Adjustment C on the next page a Frame main assembly CONFIDENTIAL ...

Page 186: ...ly by sliding the frame front from the direction of the arrow and tighten the screws Adjustments See pages 5 55 through 5 57 for details of these adjustments Slip paper guide adjustment Adjustment C Carriage transmission belt tension adjustment Adjustment D Slip paper feed parallelism adjustment Adjustment E Frame main assembly CONFIDENTIAL ...

Page 187: ... U950 U950P Technical Manual Main Assembly 1 9 Attachment of Frame Paper Take up Assembly 1 Mount the frame paper take up assembly on the frame rear by fully aligning the frame to side J and tighten the screws Frame paper take up assembly CONFIDENTIAL ...

Page 188: ...se the cutter unit lock levers of the auto cutter unit and lift the unit in the direction 2 Mount the paper feed deceleration gear and fasten it with the RE 3 Engage the paper take up belt on the gear journal transmission and the paper take up pulley Checkpoint Print head and platen gap adjustment See Adjustment F on page 5 58 CONFIDENTIAL ...

Page 189: ...0 U950P Technical Manual Main Assembly 1 11 Attachment of Wiring Board Assembly 1 Attach the wiring board assembly to the rear of the printer mechanism assembly and secure it with the screw Printer mechanism assembly rear Wiring board assembly CONFIDENTIAL ...

Page 190: ...embly 1 12 1 Soldering of Lead Wires for printers without a MICR reader 1 Solder the wires as shown in the illustration Main Assembly 1 12 2 Soldering of Lead Wires for printers with a MICR reader 1 Solder the wires as shown in the illustration CONFIDENTIAL ...

Page 191: ...cutter Blade Play 1 Move the cutter blade so that the short cutouts on the blade just disappear when seen from the hole on the cover cutter blade receiving assembly 2 Insert tweezers into the long cutout of the blade and verify that there is sufficient play left and right 3 If there is no play there must be more than one blade sticking together Disassemble the auto cutter unit and separate the bla...

Page 192: ...e Motor Gear and Carriage Feed Pulley Backlash 1 Loosen the fastening screw of the motor carriage 2 Move tab of the motor carriage to adjust the backlash 3 Tighten the fastening screw of the motor carriage Checkpoint Nominal value b 0 1 0 05 mm 0039 0020 a CONFIDENTIAL ...

Page 193: ...Technical Manual Adjustment C Slip Paper Guide 1 Insert the slip paper path spacer between the upper and lower slip paper guides 2 Push the frame front in the direction and tighten the screws firmly 3 Remove the spacer Checkpoint Nominal value a 2 mm CONFIDENTIAL ...

Page 194: ...ew of the pulley base carriage transmission assembly 3 Apply a tension gauge to the pulley base carriage transmission and adjust the tension while pulling the base horizontally 4 Firmly tighten the fastening screw of the pulley base carriage transmission Checkpoint Nominal tension value 190 g 10 g 42 022 lbs Pulley base carriage transmission assembly CONFIDENTIAL ...

Page 195: ...e of roll paper 45 to 55 Kg 99 to 121 lbs between the left and right slip paper feed rollers and slip paper hold rollers 2 Pull out one of the piece of paper and check whether the paper feed amount is identical for each side 3 If the paper feed amount differs between sides readjust the carriage guide shaft fastening screw CONFIDENTIAL ...

Page 196: ...ints see the illustration below and perform step 2 for each point 2 Insert a clearance gauge between the print head unit and the platen and adjust the gap to get the nominal value by turning the platen assembly fastening screw Note Align the print head nose with the paper hold roller Checkpoint Nominal value a 0 5 0 05 mm 020 0020 CONFIDENTIAL ...

Page 197: ... auto cutter blade for looseness Adjustment A Adjust the backlash between the carriage motor gear and the carriage feed slip Adjustment B Adjust the slip paper guide Adjustment C Adjust the tension of the carriage transmission belt Adjustment D Adjust the parallelism of the slip paper feed Adjustment E Adjust the gap between the print head unit and the platen assembly Adjustment F 1 As shown in th...

Page 198: ...lever guide shaft supports JB and RB 3 Secure the lever stop plates J and R with the screws so that they cannot move Checkpoint Make sure the lever stop plates J and R are in tight contact with the lever guide shaft supports so that there is no gap between them Do not press on the lever guide shaft supports JB and RB when bringing the lever stop plates J and R in contact with them CONFIDENTIAL ...

Page 199: ... Cover Carriage Assembly and Cover Head Assembly Mounting 1 Mount the cover carriage assembly on the frame main assembly and secure it with the screw 2 Mount the cover head assembly on the cover carriage assembly and tighten the facing screw Cover carriage assembly Cover head assembly CONFIDENTIAL ...

Page 200: ... A Main Assembly 2 3 Attaching the MICR board on printers with a MICR reader 1 Attach the outside tooth washers and the H L fittings in the three locations shown in the illustration below 2 Secure the MICR board with the three screws CONFIDENTIAL ...

Page 201: ...end the cover MICR board as shown in the illustration if it is not already bent 4 Fit the cutaway section of the cover MICR board into the H L as shown in the illustration Checkpoint Make sure the sections of the cover MICR board marked and are positioned as shown in the illustration a d CONFIDENTIAL ...

Page 202: ...d wires M2 and M4 eight times and solder them to the MICR board 6 Solder lead wires M1 M3 M5 and M6 to the MICR board 7 Solder the three lead wires from the detector carriage sub assembly to the MICR board 8 Position the lead wires as shown in the illustration below CONFIDENTIAL ...

Page 203: ...eferring to the exploded diagrams in Chapter 6 For adjustments follow the descriptions at the end of this chapter Whenever disassembly is performed even for just one part check whether adjustment is necessary before assembly Sub assembly Sub assembly A N E Detector J Assembly and N E Detector R Assembly 1 Place protrusions of the lever N E detector onto sections of the holder N E detector 2 Align ...

Page 204: ...detector J assembly make sure to attach the nut on the holder marked with and attach the microswitch so that the terminal faces mark For N E detector R assembly make sure to attach the nut on the holder marked with and attach the microswitch so that the terminal faces mark Verify that the nuts are installed correctly with their curved surfaces facing outward d e b a a b N E detector J assembly N E...

Page 205: ... the grooves of the holder switch circuit board and by passing the cables below the plate Pay attention not to close the sensor with the wires 2 3 Pass the connector and cable through hole 4 Place the spring cover on round holder of the case upper assembly 5 Mount the holder switch circuit board on the case upper assembly by aligning tabs with slot and pushing the holder down 6 Paste the switch pa...

Page 206: ...up Assembly Option 1 Insert the plate of the cam lock into the hole of the holder 2 Attach the plate spring to the indents of the cam lock to position it to the holder 3 Attach the assembled cam lock to the case upper assembly and secure the cam lock with the screws Case upper assembly CONFIDENTIAL ...

Page 207: ... 5 69 TM U950 U950P Technical Manual Sub assembly D Cover Paper Take up 1 Attach the cover paper take up to the frame paper take up assembly on the printer mechanism assembly Frame paper take up assembly Printer mechanism assembly CONFIDENTIAL ...

Page 208: ...grooves of the socket to the P ROM 2 Attach the interface circuit board to the main circuit board TM U950P only Checkpoint Make sure not to mistake the direction of the P ROM 3 Mount the main circuit board on the plate main and secure it with four screws 4 Attach the screws to the interface connector 5 Attach the screw to the plate main as a frame ground screw TM U950 TM U950P TM U950 TM U950P CON...

Page 209: ...gning its indentations with the tabs on the plate main Checkpoint Make sure that the power cable and FFCs are firmly locked into their connectors Make sure not to mistake the direction of the FFCs CAUTION When you disconnect the FFCs from their connectors be sure to pull them out straight Otherwise you may damage the connector pins CAUTION When unplugging the FFC from the mechanical assembly pull ...

Page 210: ... into the connectors on the printer mechanism assembly 4 Mount the spacer vibration assemblies in the U shaped grooves of the plate main Checkpoints Be sure to mount the spacer vibration assemblies so that the rubber side faces up Make sure that the FFCs are firmly locked into their connectors CAUTION When you disconnect the FFCs from its connectors be sure to pull it out straight Otherwise you ma...

Page 211: ...embly 4 N E Detector R and J Assemblies Attachment 1 Turn over the case lower remove any dust and dirt from the rubber foot mounting locations and paste the feet in these locations 2 Attach the cover right and cover left to the underside of the case and secure it with screws CONFIDENTIAL ...

Page 212: ...to the detector adjustment screws 5 Attach the N E detector R assembly and J assembly to the case lower by sliding section then secure them with the assembled detector adjustment screws Adjustment Adjust the N E detectors Refer to Adjustment G at the end of this chapter a N E detector R assembly N E detector J assembly CONFIDENTIAL ...

Page 213: ... mechanism assembly to the microswitches 4 Secure the printer mechanism assembly with the screws and washers If the printer has a MICR reader secure lead wire M6 with a screw as shown below Checkpoints Be sure to attach the power switch in the proper direction Make sure that each cable is firmly connected to its corresponding microswitch Be sure that the power cable is not caught between the plate...

Page 214: ...rom the switch circuit board to the CN8 on the main circuit board unit 2 Mount the case upper assembly on the case lower assembly by hooking the three tabs on the case upper assembly to the three hooks on the case lower then secure the case upper with two screws Case upper assembly Case lower assembly CONFIDENTIAL ...

Page 215: ...Cover Main Assembly Attachment 1 Insert protrusion on the cover face into the slot of the printer mechanism assembly then secure the cover with the screw 2 Attach the cover main unit assembly to the printer mechanism assembly by aligning holes and with dowels and a d e b c Cover main unit assembly CONFIDENTIAL ...

Page 216: ...5 78 Disassembly Assembly and Adjustments Rev A Main Assembly 8 Cover ROM Attachment 1 Secure the cover ROM with the screw Case lower assembly CONFIDENTIAL ...

Page 217: ... a near end thickness A which is the thickness of the paper core including the remaining paper roll according the chart below The dimension A values in the table are obtained by calculation only Therefore they may not be appropriate for all printers When a red end mark is painted on the end of the paper roll the entire roll may be pulled up because the end mark acts as an adhesive In this case dim...

Page 218: ...detector adjustment screws on both receipt and journal sides and place the selected line of the N E detector R and J assembly so that the appropriate adjustment value is obtained 4 After the adjustment check that the lever N E detector moves smoothly CONFIDENTIAL ...

Page 219: ...n is executed correctly Replace the main circuit board if this error message is still printed after executing the adjustment two times 4 EEPROM threshold value check Checks the threshold value in EEPROM and prints the following message shows threshold value in hexadecimal 5 Detection value measurement without slip paper Measures the slip paper insert detection value without slip paper The result i...

Page 220: ... initialization is executed correctly Replace the main circuit board if this error message is still printed after executing the adjustment a couple of times 10 End special setting mode Prints the following message and ends special setting mode The printer automatically enters printing mode when special setting mode is finished Set DIP switch 6 of the switch bank 2 to off after the message is print...

Page 221: ...L SLIP FEED button 3 Press the JOURNAL SLIP FEED button at least 3 times and close the printer cover Printer prints the following message and the SLIP LED flashes TEST PRINT MODE 1 Magnetic ink character reading check Please set personal check If you want to cancel check waiting press SLIP FEED button 2 Magnetic character recognition test Perform the test with the check sheet on the market 1 Set t...

Page 222: ... the Check sheet specification later in this section If you don t proceed to the next test press SLIP FEED button to skip the test or turn the printer power off to quit the test The tests numbered 3 and 4 are to check the MICR mechanism functions For the tests use the specified sheets See page 5 86 3 Noise test Noise level of the MICR mechanism is checked Some sheets may have magnetic ingredients ...

Page 223: ...ge difference between maximum and minimum value Standard below 1 2 V lower MAX V Output voltage maximum value at lower side Standard below 2 0 V P P V Output voltage difference between maximum and minimum value Standard below 1 2 V 7 Wave form check 2nd Please set check with magnetic ink calibration If you want to cancel calibration check waiting press SLIP FEED button If the values are out of the...

Page 224: ...oller cleaning sheet code 102590200 Remove the tape as shown before you use the sheet Seiko Epson calibration check sheet code 102590000 Magnetic head cleaning sheet Recommendation PRESAT brand KIC Check Reader Cleaning Card or equivalent 152 mm 70 mm 155 mm 70 mm Remove the tape Upper side Inserting direction 20 40 60 80 5 10 15 20 0 CMC7 E13B EPSON CHECK SAMPLE gpæ FbN CONFIDENTIAL ...

Page 225: ...rawings Main board Main circuit board contains circuit 1 to circuit 8 and main circuit which are shown in the following pages Figure 6 1 indicates the main circuit board block diagram Circuit 1 to circuit 8 are included in the main circuit Figure 6 1 Main Circuit Block Diagram CONFIDENTIAL ...

Page 226: ...6 2 Appendix Rev A Circuit 1 CONFIDENTIAL ...

Page 227: ...Rev A Appendix 6 3 TM U950 U950P Technical Manual Circuit 2 CONFIDENTIAL ...

Page 228: ...6 4 Appendix Rev A Circuit 3 CONFIDENTIAL ...

Page 229: ...Rev A Appendix 6 5 TM U950 U950P Technical Manual Circuit 4 CONFIDENTIAL ...

Page 230: ...6 6 Appendix Rev A Circuit 4 Circuit 5 CONFIDENTIAL ...

Page 231: ...Rev A Appendix 6 7 TM U950 U950P Technical Manual Circuit 6 Circuit 7 CONFIDENTIAL ...

Page 232: ...6 8 Appendix Rev A Circuit 8 CONFIDENTIAL ...

Page 233: ...Main Unit Circuit Drawing for TM U950 Appendix 6 9 TM U950 U950P Technical Manual CONFIDENTIAL ...

Page 234: ...TM U950 U950P Technical Manual Main Unit Circuit Drawing for TM U950P Appendix 6 10 CONFIDENTIAL ...

Page 235: ...MICR Board for printers with a MICR reader Not Available for the TM U950P TM U950 U950P Technical Manual Appendix 6 11 CONFIDENTIAL ...

Page 236: ...TM U950 U950P Technical Manual Parallel Interface Circuit Board Diagram Appendix 6 12 CONFIDENTIAL ...

Page 237: ...Main Circuit Board Parts Layout for TM U950 TM U950 U950P Technical Manual Appendix 6 13 CONFIDENTIAL ...

Page 238: ...TM U950 U950P Technical Manual Main Circuit Board Parts Layout for TM U950P Appendix 6 14 CONFIDENTIAL ...

Page 239: ...TM U950 U950P Technical Manual Parallel Interface Circuit Board Parts Layout Appendix 6 15 CONFIDENTIAL ...

Page 240: ...TM U950 U950P Technical Manual Overall Exploded Diagrams Printers Without a MICR Reader 1 4 Both TM U950 and TM U950P Appendix 6 16 CONFIDENTIAL ...

Page 241: ...TM U950 U950P Technical Manual Printers Without a MICR Reader 2 4 Appendix 6 17 CONFIDENTIAL ...

Page 242: ...TM U950 U950P Technical Manual Printers Without a MICR Reader 3 4 Appendix 6 18 CONFIDENTIAL ...

Page 243: ...TM U950 U950P Technical Manual Printers Without a MICR Reader 4 4 Appendix 6 19 The current boards H L and plate main are different for the TM U950P Please see the next page CONFIDENTIAL ...

Page 244: ...ers Without a MICR Reader 4 4 TM U950P Only Appendix 6 20 Interface circuit board P ROM Main circuit board CPS tite M3 x 6 Plate main Note These parts are different for the TM U950P All other parts are the same as the TM U950 CONFIDENTIAL ...

Page 245: ...TM U950 U950P Technical Manual Printers With a MICR Reader 1 5 Appendix 6 21 CONFIDENTIAL ...

Page 246: ...TM U950 U950P Technical Manual Printers With a MICR Reader 2 5 Appendix 6 22 CONFIDENTIAL ...

Page 247: ...TM U950 U950P Technical Manual Printers With a MICR Reader 3 5 Appendix 6 23 CONFIDENTIAL ...

Page 248: ...TM U950 U950P Technical Manual Printers With a MICR Reader 4 5 Appendix 6 24 CONFIDENTIAL ...

Page 249: ...TM U950 U950P Technical Manual Printers With a MICR Reader 5 5 Appendix 6 25 CONFIDENTIAL ...

Page 250: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers Without a MICR Reader 1 3 Appendix 6 26 CONFIDENTIAL ...

Page 251: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers Without a MICR Reader 2 3 Appendix 6 27 CONFIDENTIAL ...

Page 252: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers Without a MICR Reader 3 3 Appendix 6 28 CONFIDENTIAL ...

Page 253: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader 1 4 Appendix 6 29 CONFIDENTIAL ...

Page 254: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader 2 4 Appendix 6 30 CONFIDENTIAL ...

Page 255: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader 3 4 Appendix 6 31 CONFIDENTIAL ...

Page 256: ...TM U950 U950P Technical Manual Lubrication Points Diagram for Printers With a MICR Reader 4 4 Appendix 6 32 CONFIDENTIAL ...

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