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Brother PT-9200PC Service Manual Download Page 76

III - 13

3.2.10 Interface Circuit

Fig. 3.2-11 shows the interface circuit.

This circuit is a 8-pin, RS-232C interface circuit for making connections to a
computer.

#3 is a RS-232C driver IC which converts logic level signals into RS-232C (+ and)
signals.

The RXD signal is a print data input signal from the computer and transmitted at a
maximum baud rate of 115.2 K.

The TXD and DTR signals are control output signals to the computer.

With the power on, P66 is switched to high to turn on Q5 (transistor) so that the
power Vcc is supplied to #3.

 

Fig. 3.2-11  Interface Circuit

Summary of Contents for PT-9200PC

Page 1: ...SERVICE MANUAL MODEL PT 9200PC ...

Page 2: ...SERVICE MANUAL MODEL PT 9200PC ...

Page 3: ...ht Brother 1998 All rights reserved No part of this publication may be reproduced in any form or by any means without permission in writing from the publisher Specifications are subject to change without notice ...

Page 4: ...ncerned persons to accurately and quickly provide after sale service for our PT 9200PC To perform appropriate maintenance so that the machine is always in best condition for the customer the service personnel must adequately understand and apply this manual This manual is made up of four chapters and an appendix CHAPTER I SPECIFICATIONS CHAPTER II MECHANISMS CHAPTER III ELECTRONICS CHAPTER IV TROU...

Page 5: ...CHAPTER I SPECIFICATIONS ...

Page 6: ... I 1 1 1 2 Input Specifications I 2 1 1 3 Display Specifications I 2 1 1 4 Printing Specifications I 2 1 1 5 Tape Cassette Specifications I 3 1 1 6 Tape Cutter Specifications I 3 1 1 7 PC Interface Specifications I 3 1 2 ELECTRONIC SPECIFICATIONS I 4 1 2 1 Power Supply Specifications I 4 ...

Page 7: ...ICAL SPECIFICATIONS 1 1 1 External View 1 Dimensions W D H 115 mm 245 mm 145 mm 2 Weight Machine proper Approx 1 5 kgf only the machine Machine and package Approx 2 4 kgf 145 mm 115 mm 245 mm Fig 1 1 1 External View ...

Page 8: ...ications 1 Printing method Thermal transfer or heat sensitizing method by thermal head Printing on plastic tapes laminated and non laminated tapes or special tapes instant lettering tape non laminated thermal film tape and fabric printing tape Fixed print head and tape feed mechanism 2 Printing speed 20 mm sec 3 Print head Type Thin film thermal head 384 dots 1 dot Dimensions of a heating element ...

Page 9: ... tape cassette Porous stamp tape and mount 3 Tape size Width Length Laminated tape 6 9 12 18 24 36 mm 8 m 5 m for fluorescent coating tapes Non laminated tape 6 9 12 18 24 mm 8 m Instant lettering tape 18 mm 8 m Fabric printing tape 18 mm 8 m Stamp tape 18 mm 8 m 1 1 6 Tape Cutter Specifications 1 Tape cutting method Automatic full cutting method not user replaceable Automatic half cutting method ...

Page 10: ...ifications 1 Power supply method Commercially available power 120V AC 60 Hz for North America and 230V AC 50 Hz for Europe is input and stabilized to generate DC voltage by the switching regulator in the machine The power supply cord is inserted into an inlet ...

Page 11: ...CHAPTER II MECHANISMS ...

Page 12: ... 7 Removing the Main PCB Assy and the Mechanical Printing Unit II 18 8 Disassembly of the Body Cover II 20 9 Removing the Eject Unit Assy the Half Cutter Assy the Half Spacer and the Cutter Assy II 23 10 Removing the Half Frame Assy II 24 11 Disassembly of the Mechanical Unit II 26 12 Disassembly of the Head Roller Holder Unit II 28 2 2 2 Reassembly Procedures II 29 1 Reassembly of the Head Roller...

Page 13: ...ubber platen crimps the tape and the ink ribbon on the thermal head At this time the CPU selects the required heating elements out of the 384 heating elements to energize them The theory of printing depends on the use of non laminated thermal film tape cassettes or other tape cassettes Laminated tape when using laminated tape cassettes Non laminated tape when using non laminated tape cassettes Ins...

Page 14: ...heating element s generates heat the porous stamp tape will be melted so that a pore s will be formed in the tape The tape is advanced and the next heating cycle is repeated thus forming a character of pores in the tape The printed stamp tape can be used as the face of a stamp When the stamp is pressed against the ink pad it will absorb ink through the pores 3 Character Formation While the main mo...

Page 15: ... thermal film tape cassettes or stamp tape cassettes sandwiched inbetween under a uniform load by the platen spring At the same time the platen gear becomes engaged with the platen idle gear Also the tape feed sub roller is pressed perpendicularly against the tape feed roller built in the tape cassette with the tape and base paper when using laminated tape cassettes or stamp tape cassettes sandwic...

Page 16: ...1 2 As the tape feed motor stepping motor rotates the rotation is transmitted via the gear train to the platen idle gear which rotates the platen gear and the tape feed gear which rotates the tape feed roller and the tape feed sub roller at the same rotation speed Accordingly the sandwiched tape and ink ribbon will be advanced When a laminated tape cassette is mounted the sandwiched laminated tape...

Page 17: ...in rotates counterclockwise When fitted on the ribbon drive cam the ribbon take up roll in the tape cassette also rotates to take up the ink ribbon To apply proper tension to the ink ribbon between the platen roller and the ribbon drive cam the feed amount of the ribbon drive cam is slightly greater than that of the tape feed gear The difference between the feed speeds at the platen roller and at ...

Page 18: ...ovable blade actuates the movable blade to pivot it around shaft B Consequently the cutter cuts the printed tape routing through the movable and stationary blades just like a pair of scissors Subsequently the CPU keeps the full cutter motor on When the movable blade returns to the home position part C of the cutter helical gear presses the full cutter sensor switch secured on the half frame The mo...

Page 19: ...der is inserted operates the half cutter holder to pivot it around shaft E The stationary plate is provided with space as wide as the separator of a laminated tape A laminated tape is pressed against the stationary plate by the half cutter holder for half cutting Half cutting refers to cutting a tape except its separator Subsequently the CPU rotates the half cutter motor counterclockwise to return...

Page 20: ... printed tape the tape is pressed against the stationary roller by the eject roller and held in place until the cutter completes cutting the tape These operations of the cutter and the eject roller unit are controlled by cam G Upon completion of the cutting of the tape by the cutter released cam G causes the spring to slide the eject roller unit in direction J At this time the two cams and springs...

Page 21: ... actuator Cover open button Cover lock button Cover button actuator Fig 2 1 8 Cover Open Button 2 1 8 Cover Open Cover Lock Sensor The cover open cover lock sensor push switch is provided on the cassette sensor PCB Closing the cassette cover puts its sensor tab on the cover open cover lock sensor push switch signaling that the cassette cover is closed Cassette cover Cassette sensor PCB Cover open ...

Page 22: ... the list of tightening torque below List of Tightening Torque Position Screw Qty Tightening torque kgf cm Head roller holder unit Screw pan S P washer M3 10 2 59 10 N cm 6 1 kgf cm Eject unit Screw pan S P washer M4 12 2 88 10 N cm 9 1 kgf cm Half frame Screw pan S P washer M3 6 2 59 10 N cm 6 1 kgf cm Tape feed motor Screw pan M2 6 3 5 2 39 10 N cm 4 1 kgf cm Full cutter motor 2 Half cutter moto...

Page 23: ... Hold both sides of the tape cassette and lift it to remove it Cassette cover Front cover Cover open button Cover lock button Tape cassette Fig 2 2 1 Removing the Tape Cassette Disassembly of the Covers 2 Removing the Cassette Cover While pressing part A with the end of a screwdriver slightly tilt the cassette cover with side B turned upwards and lift the cassette cover to remove it Cassette cover...

Page 24: ...r removes the cassette spring Cassette presser Cassette cover Hooks Cassette spring Fig 2 2 3 Removing the Cassette Presser and Spring 2 Release the hooks on both sides of the cover lock actuator with the end of a screwdriver to remove the cover lock actuator Removing the cover lock actuator removes the cover lock spring Cover lock spring Cassette cover Cover lock actuator Fig 2 2 4 Removing the C...

Page 25: ...II 13 4 Removing the Lower Cover Turn the machine over and remove the screw from the lower cover to remove the lower cover Lower cover Bottom cover Screw Fig 2 2 5 Removing the Lower Cover ...

Page 26: ... 2 6 Removing the Screws Securing the Ground Wire 2 Remove screws C and D securing the bottom cover Then remove the core of the inlet bracket unit from the storage space in the bottom cover before removing screw E securing the bottom cover Core Screw E Core Bottom cover Screw C Screw D Bottom cover Screw E Fig 2 2 7 Removing the Screws Securing the Bottom Cover ...

Page 27: ...ctor from the main PCB Caution Do not pull the harness hold the connector to pull it out Bottom cover Main PCB Power supply harness Fig 2 2 8 Removing the Power Supply Harness and Connector 5 While pressing the body cover lift the front cover diagonally to remove it Body cover Front cover Main PCB Fig 2 2 9 Removing the Front Cover ...

Page 28: ...t unit Fig 2 2 10 Removing the Inlet Unit 3 Remove the two screws securing the power supply PCB assy 4 Release the power supply harness from the hook of the bottom cover and lift the power supply PCB assy to remove it 5 Lift shield plate B to remove it Power supply PCB assy Shield plate B Bottom cover Two screws Fig 2 2 11 Removing the Power Supply PCB Assy and Shield Plate B ...

Page 29: ...inlet bracket Inlet bracket Inlet assy Two screws Fig 2 2 12 Removing the Inlet Assy 7 Remove the inlet assy and power supply harnesses from the power supply PCB assy Inlet assy harness Power supply PCB assy Power supply harness Fig 2 2 13 Removing the Inlet Assy and Power Supply Harnesses ...

Page 30: ...re not to damage the connectors and cables Full cutter sensor connector P7 Tape feed motor connector P10 Body cover Tape end sensor connector P4 Full cutter motor connector P5 Power supply connector P1 Main PCB assy Half cutter motor connector P6 Connector to be unlocked Head flexible cable P9 Sub PCB harness P2 Sensor PCB harness P3 Half cutter sensor connector P8 Fig 2 2 14 Removing the Connecto...

Page 31: ...rews Main PCB assy Shield plate A Body cover Mechanical printing unit Fig 2 2 15 Removing the Main PCB Assy 3 Remove the two screws securing shield plate A and the mechanical printing unit to remove them Two screws Shield plate A Body cover Mechanical printing unit Fig 2 2 16 Removing the Mechanical Printing Unit ...

Page 32: ...and lift the cassette cover bracket to remove it Two screws Body cover Cassette cover bracket Fig 2 2 17 Removing the Cassette Cover Bracket 2 Rotate the cover open cam in direction A until it stops and then remove it Cover open cam Cassette cover bracket A Fig 2 2 18 Removing the Cover Open Cam ...

Page 33: ...er Cassette cover bracket Fig 2 2 19 Removing the Damper Rubber and the Cover Open Spring 4 Remove the two screws to remove the tape end sensor assy 5 Release the two hooks of the body cover to the outside of the sensor PCB to remove the sensor PCB assy Hook Sensor PCB assy Hook Tape end sensor assy Body cover Two screws Fig 2 2 20 Removing the Tape End Sensor Assy and the Sensor PCB Assy ...

Page 34: ...from the power supply actuator Two screws Body cover Sub PCB assy Power supply switch button ON OFF key Power supply actuator Cut feed button FEED CUT key Fig 2 2 21 Removing the Sub PCB Assy and the Button 8 Release the two hooks on the back of the cover lock button to remove the cover lock button from the body cover 9 Remove the cover lock spring Hooks Cover lock spring Cover lock button Body co...

Page 35: ...ing the Eject Unit Assy the Half Cutter Assy the Half Spacer and the Cutter Assy Remove the two screws on the side of the mechanical unit to remove the eject unit assy the half cutter assy the half spacer and the cutter assy Warning Take care not to be injured by the blades of the cutter assy and the half cutter assy Cutter assy Full cutter assy Half spacer Two screws Eject unit assy Half cutter a...

Page 36: ... Half rock gear Retaining ring Cutter helical gear Fig 2 2 25 Removing the Half Rock Gear and the Cutter Helical Gear 3 Remove the two screws to remove the half cutter sensor assy and the full cutter sensor assy Main frame Half cutter sensor assy Screws Half frame assy Full cutter sensor assy Fig 2 2 26 Removing the Half Cutter Sensor Assy and the Full Cutter Sensor Assy ...

Page 37: ...o remove it At this time take care not to damage the motor worm gear Two screws Full cutter motor assy Half frame assy Two screws Half cutter motor assy Fig 2 2 27 Removing the Half Cutter Motor Assy and the Full Cutter Motor Assy 6 Remove the two screws from the half frame assy to remove it Two screws Half frame assy Main frame Fig 2 2 28 Removing the Half Frame Assy ...

Page 38: ...or assy Main frame Fig 2 2 29 Removing the Tape Feed Motor Assy 2 Remove the two screws and press the back of the head roller holder unit to remove it At this time detach the tape securing the thermal head cable on the frame assy Head roller holder unit Head assy Main frame Thermal head cable Securing tape Two screws Fig 2 2 30 Removing the Head Roller Holder Unit ...

Page 39: ...the shaft 6 As the release rod roller is secured in place by the elasticity of the resin of the roller release rod press the shaft of the release rod roller to remove it from the roller release rod Roller release rod Release cam Retaining ring Main frame Release lever spring Release rod roller Release lever spring Roller release rod Main frame A Fig 2 2 31 Removing the Roller Release Rod ...

Page 40: ...assy Note Do not touch the rubber platen Touching the platen may impair printing quality Retaining ring Roller holder assy Roller holder shaft Head assy Platen rubber Fig 2 2 32 Removing the Roller Holder Assy 3 Remove the roller holder release spring Note Take care not to lose the roller holder release spring which is removed simultaneously when the roller holder assy is removed Roller holder ass...

Page 41: ...n the roller holder insert the platen shaft at the top of the roller holder assy into the slit at the top of the head assy while tilting the roller holder assy Then insert the shaft at the bottom into the slit at the bottom of the head assy to set the roller holder assy At this time check that the release spring is hooked on the correct portion of the head assy 3 After inserting the roller holder ...

Page 42: ...oking the release lever spring on the hole at the bottom of the roller release rod pull the release lever spring to hook it on the hole in the frame 6 Apply the specified grease 3 mm 3 on each of the inside of the square hole in the roller release rod and the release rod roller Specified grease Silicone grease G501 Roller release rod Release rod roller Release lever spring Roller release rod Main ...

Page 43: ...ing the release cam vertically Two screws Head roller holder unit Boss on the main frame Main frame Oblong hole in the main frame Head assy Fig 2 2 37 Reassembly of the Head Roller Holder Unit 9 Set the tape feed motor assy on the frame and tighten the screws from the back of the frame Note Backlash on the motor gear should be 0 05 to 0 3 mm Two screws Tape feed motor assy Main frame Fig 2 2 38 Re...

Page 44: ...ert the end of the motor worm gear into the small hole in the half frame After that tighten the two screws with the end of the motor worm gear pressed downward Specified grease Silicone grease G501 3 Insert the half cutter motor assy from the back of the half frame assy and tighten the two screws Then apply the specified grease 3 mm3 on the gear of the half cutter motor assy Specified grease Silic...

Page 45: ...r Sensor Assy 5 Mount the cutter helical gear onto the shaft and check to be sure that the backlash between the helical gear and the cutter worm gear is 0 to 0 1 mm If the backlash is greater than this range remove the two screws of the full cutter motor and adjust the backlash correctly After obtaining the correct amount of backlash set the retaining ring on the shaft 6 Set the half rock gear wit...

Page 46: ...ating shafts of the frame assy into the round and oblong holes in the half spacer 4 After inserting the half rock pin of the half cutter assy into the groove in the half rock gear insert the two locating shafts of the frame assy into the round and oblong holes 5 After setting the eject cam of the eject unit assy on the cutter rock pin insert the two locating shafts of the frame assy into the round...

Page 47: ...e Cover Lock Actuator 2 Press fit the cover lock spring on the projection on the back of the cover lock button while slightly rotating the cover lock spring 3 Align the cover lock spring set in the cover lock button on the projection of the body cover for the cover lock spring to set the cover lock button in the body cover Check that the cover lock actuator slides smoothly by pressing the cover lo...

Page 48: ...tionHole B Cut feed button FEED CUT key Power supply actuator Power supply switch button ON OFF key Projections Hole Sub PCB assy Hole A Fig 2 2 46 Reassembly of the Button and the Sub PCB Assy 7 Set the sensor PCB assy on the two hooks of the body cover and press the sensor PCB until these hooks click There is no screw to be tightened Check if the solder of the harness has peeled off 8 Insert the...

Page 49: ...per rubber is sandwiched between the assy and the bracket Specified grease Silicone grease G501 Hook Cover open spring Cover open cam Damper rubber Cassette cover bracket Apply the grease on the back Apply the grease here Fig 2 2 48 Reassembly of the Cover Open Cam 12 Align the two locating projections on the body cover with the holes in the cassette cover bracket to set the cassette cover bracket...

Page 50: ...ee locating projections on the body cover At this time take care not to sandwich the harnesses and connectors inbetween Set shield plate A on the two projections on the body cover Subsequently tighten the two screws Two screws Shield plate A Body cover Mechanical printing unit Fig 2 2 50 Reassembly of the Mechanical Printing Unit ...

Page 51: ...B on the two projections on the body cover with shield plate A sandwiched inbetween Subsequently tighten the three screws Three screws Main PCB assy Shield plate A Body cover Mechanical printing unit Fig 2 2 51 Reassembly of the Main PCB Assy 3 Attach the head flexible cable on the back of the main frame with a tape Main frame Securing tape Head flexible cable Fig 2 2 52 Attaching the Head Flexibl...

Page 52: ...d Soldering Points Thermal head resistance value L A B C D E F S Soldering point A A B C D E F F Half cutter motor connector P6 Half cutter sensor connector P8 Sensor PCB harness P3 Sub PCB harness P2 Head flexible cable P9 Connector to be locked Full cutter sensor connector P7 Tape feed motor connector P10 Body cover Tape end sensor connector P4 Main PCB assy Power supply connector P1 Full cutter...

Page 53: ...e bottom cover over and set the oblong hole in shield plate B on the projection on the bottom cover to set shield plate B on the bottom cover 3 After plugging the inlet assy and power supply harnesses into the connectors on the power supply PCB set the power supply PCB assy on the bottom cover with shield plate B sandwiched inbetween Then tighten the two screws Two screws Power supply harness Powe...

Page 54: ...nd tighten the two screws Two screws Bottom cover Inlet unit Fig 2 2 56 Reassembly of the Inlet Unit 5 Pass the power supply harness through the hole in the bottom cover and secure it on the hook of the bottom cover Bottom cover Power supply harness Fig 2 2 57 Securing the Power Supply Harness ...

Page 55: ... Store the two large and small cores in the storage space in the bottom cover and insert the two harnesses blue and brown into the slits in the inlet bracket Core Body cover Fig 2 2 58 Running the Inlet Unit Harnesses ...

Page 56: ...body cover set the front cover on the hook Mechanical printing unit Front cover Body cover Rib Rib Hook Fig 2 2 59 Reassembly of the Front Cover 2 Insert the power supply harness into the connector on the main PCB Bottom cover Main PCB Power supply harness Fig 2 2 60 Connecting the Power Supply Harness and Connector ...

Page 57: ...crews C and D securing the bottom cover Pull out the large core from the storage space and tighten screw E Core Screw E Body cover Screw D Screw C Screw E Core Body cover Fig 2 2 61 Reassembly of the Body Cover and the Bottom Cover 5 Tighten screws A and B to secure shield plate B and the ground wire on the half frame Screw A Screw B Ground wire Shield plate B Half frame Fig 2 2 62 Tightening the ...

Page 58: ...II 46 PT99007 6 Set the lower cover on the bottom cover and tighten the screw Screw Bottom cover Lower cover Fig 2 2 63 Reassembly of the Lower cover ...

Page 59: ...4 Reassembly of the Cover Lock Actuator 2 Press fit the cassette spring on the projection on the back of the cassette presser while slightly rotating the cassette spring 3 Set the cassette presser At this time check that the cassette spring is set on the projection on the cassette cover by viewing it from the side After setting it check that the three hooks are securely locked and that the cassett...

Page 60: ... on the cassette cover 2 Check that the cassette cover opens and closes properly Cover open cam Cassette cover Cassette cover Projections on the cassette cover bracket Body cover Fig 2 2 66 Reassembly of the Cassette Cover 11 Reassembly of the Tape Cassette Press the cover open button cover lock button to open the cassette cover Set the tape cassette from the top and then close the cassette cover ...

Page 61: ...mal head 5 Check that the FEED CUT key operates correctly 6 Check that the ON OFF key operates correctly LED ON OFF key Display State of the LED Display Lights up in green Data reception standby mode Blinks in green Data has been received Lights up in orange No cassette is present in the data reception standby mode The cover is open while data is being received before printing Blinks in orange The...

Page 62: ...CHAPTER III ELECTRONICS ...

Page 63: ... Motor Tape Feed Motor Drive Circuit III 5 3 2 5 DC Motor Cutter Motor Drive Circuit III 7 1 Full Cutter Motor Drive Circuit and Full Cutter Sensor Circuit III 8 2 Half Cutter Motor Drive Circuit and Half Cutter Sensor Circuit III 8 3 Process of Full or Half Cutter Errors III 9 3 2 6 Cassette Detection Sensor Circuit III 9 3 2 7 Thermal Head Control Circuit III 10 1 Basic Energizing Time III 11 2 ...

Page 64: ...le power Inlet Power supply PCB Interface connector Main PCB Fig 3 1 1 Configuration of the Electronic Part 3 1 1 Main PCB The main PCB controls all electronic operations This PCB consists of the CPU the RAM the EEPROM the I F driver and the motor driver 3 1 2 Power Supply PCB There are two types of power supply PCB 100V system for North America and 200V system for Europe This PCB equipped with a ...

Page 65: ...cal switch which detects the position of the full cutter 3 1 7 Half Cutter Sensor The half cutter sensor is a sensor mechanical switch which detects the position of the half cutter 3 1 8 Full Cutter Motor The full cutter motor is the drive to cut the tape This DC motor runs at a drive voltage of VH 24V 3 1 9 Half Cutter Motor The half cutter motor is the drive for the half cutting of laminated tap...

Page 66: ...N OFF circuits 5 Full cutter motor drive circuit half cutter motor drive circuit and tape feed motor drive circuit 6 Cassette sensor circuit cover open sensor circuit automatic full and half cutter sensor circuit and tape end sensor circuit 7 Head level detection circuit 8 Ambient temperature detection circuit and head temperature detection circuit 9 Reset circuit 10 RS 232C serial interface circu...

Page 67: ...M has 4 Kbytes 2 RAM SRAM Two 128 Kbyte SRAMs 1 and 2 are used as a data buffer 3 ROM EEPROM A 1 Kbit EEPROM 4 is used into which baud rate and mechanical information is written to be stored 3 2 2 Solder Points Fig 3 2 2 shows the solder point circuit One of solder points A F is soldered according to the resistance level of the thermal head The solder points are read once immediately after the pow...

Page 68: ...mal head the full cutter motor the half cutter motor and the tape feed motor 3 2 4 Stepping Motor Tape Feed Motor Drive Circuit Fig 3 2 3 shows the stepping motor drive circuit The Ø25 stepping motor is used to feed the ribbon and the tape The stepping motor feeds the tape 1 720 in for one pulse one dot for two pulses Drive pulses are transmitted from P104 P107 of the CPU 5 to Q1 Q4 to drive the m...

Page 69: ...or 70 pulses d The motor rotates clockwise to resume printing with 3 dots printed again Fig 3 2 3 Stepping Motor Drive Circuit 4 Printing at low speed If the head temperature is 41 C or higher during printing on laminated or non laminated tapes low speed printing is performed to ensure printing quality The through up pulses including pre excitation and the through down pulses including post excita...

Page 70: ...nsmitted from DCR1 and DCF1 of the CPU 5 to BA6919FP 6 to drive the motor With half cutting drive pulses are transmitted from DCR2 and DCF2 of the CPU 5 to BA6919FP 7 to drive the motor Table 3 2 1 shows the logic of DCR1 DCF1 DCR2 and DCF2 Fig 3 2 4 DC Motor Drive Circuit Fig 3 2 5 Cutter Sensor Circuit State DCF1 DCR1 DCF2 DCR2 OFF 0 0 0 0 Clockwise 1 0 1 0 Counterclockwise 0 1 0 1 Brake 1 1 1 1...

Page 71: ... operations If an abnormal end shifts the cutter from the home position the DC motor rotates counterclockwise before printing to return the cutter to the home position initialization If the cutter remains at the home position 300 msec or does not return to the home position 1000 msec after the DC motor starts rotating clockwise it is processed as an error The DC motor does not operate with the cov...

Page 72: ...the board turns on the switch of the cassette sensor which detects the ribbon type and the tape width Table 3 2 2 shows the combinations of the cassette Fig 3 2 6 Cassette Detection Sensor Circuit Cassette type RS10 RS11 RS12 RS13 RS14 No cassette 0 0 0 0 0 6 mm Laminated 0 0 1 0 0 Non laminated 0 0 1 1 0 9 mm Laminated 1 1 1 0 0 Non laminated 1 1 0 0 0 12 mm Laminated 0 1 0 0 0 Non laminated fabr...

Page 73: ... to the four drivers in synchronization with the clock signal Print data is output in synchronization with the 3 685 MHz clock a quarter of 14 74 MHz In response to the LATCH signal from P62 of the CPU the head driver circuit latches the print data to synchronize it with the STB signal from P80 driving the specified heating elements The method of controlling the thermal head is as follows Fig 3 2 ...

Page 74: ...e preceding dot energized Otherwise SUB1 turns off 4 Control by Ribbon Type An energizing time appropriate for the ribbon type is set 5 Control by the Resistance Level of the Thermal Head The resistance values of the thermal head are classified into levels of A F and read from the above mentioned solder points to calculate an energizing time appropriate for the resistance value 6 Temperature Contr...

Page 75: ...rt variations in the temperature of the head into variations in voltage to input them into the A D input port AN1 of the CPU Fig 3 2 9 Head Temperature Detection Circuit 3 2 9 Oscillation Circuit Fig 3 2 10 shows the oscillation circuit This circuit contains a 14 74 MHz oscillator to generate an oscillation at 14 74 MHz The internal operations of the CPU are executed based on this clock Fig 3 2 10...

Page 76: ...er IC which converts logic level signals into RS 232C and signals The RXD signal is a print data input signal from the computer and transmitted at a maximum baud rate of 115 2 K The TXD and DTR signals are control output signals to the computer With the power on P66 is switched to high to turn on Q5 transistor so that the power Vcc is supplied to 3 Fig 3 2 11 Interface Circuit ...

Page 77: ... black transparent at the end of the tape passes by the photosensor Fig 3 2 12 Tape End Sensor Circuit 3 2 12 Switch and LED Circuit Fig 3 2 13 shows the switch and LED circuit This circuit controls the ON OFF and FEED CUT switches and the power supply LED The LED lights up or blinks in green or red according to the state of the machine Fig 3 2 13 Switch and LED Circuit ...

Page 78: ...Circuit 3 3 POWER SUPPLY PCB Commercially available power is supplied to the power supply PCB through the power supply cord which is inserted into an inlet The inlet has a total of three wires one of which is for grounding and the other two are for inputting AC voltage into the power supply PCB The switching regulator of the power supply PCB stabilizes the AC voltage to generate DC voltage VH 24V ...

Page 79: ...CHAPTER IV TROUBLESHOOTING ...

Page 80: ...rinting is performed with specific dots omitted IV 1 2 The tape cassette type is not detected correctly IV 2 3 The LED does not light up IV 2 4 No printing is performed IV 3 5 The interface malfunctions IV 3 6 The tape is not cut IV 4 7 The tape is not fed correctly IV 5 8 Half cut is not possible IV 7 9 The tape is not ejected forcibly IV 8 ...

Page 81: ... cord and check that power is not supplied to the machine 2 If a printer failure occurs unplug the thermal head cable and wait until the thermal head and related circuits are restored to execute normal operation 3 Use a specified AC adapter to supply power to the machine 4 1 2 Troubleshooting Flows 1 Printing is performed with specific dots omitted ...

Page 82: ...IV 2 2 The tape cassette type is not detected correctly 3 The LED does not light up ...

Page 83: ...IV 3 4 No printing is performed 5 The interface malfunctions ...

Page 84: ...IV 4 6 The tape is not cut PT99007 ...

Page 85: ...IV 5 7 The tape is not fed correctly PT99007 ...

Page 86: ...IV 6 ...

Page 87: ...IV 7 8 Half cut is not possible PT99007 ...

Page 88: ...IV 8 9 The tape is not ejected forcibly PT99007 ...

Page 89: ...PT99064 APPENDIX Circuit Diagram Main PCB Power Supply PCB ...

Page 90: ...CONTENTS PT99064 APPENDIX Main Control PCB Circuit Diagram APP 1 Power Supply PCB APP 2 ...

Page 91: ...APP 1 ...

Page 92: ...Appendix Power Supply PCB Circuit Diagram PT99064 ...

Page 93: ...Aug 98 5V2076BE0 Printed in Japan ...

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