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Содержание P-Touch PT-530

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Страница 2: ...SERVICE MANUAL MODEL PT 530 550 ...

Страница 3: ...ht Brother 1997 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 ...

Страница 4: ...persons to accurately and quickly provide after sale service for our PT 530 550 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 appendices CHAPTER I SPECIFICATIONS CHAPTER II MECHANISMS CHAPTER III ELECTRONICS CHAPTER IV TROUBLESHOOT...

Страница 5: ...Chapter I SPECIFICATIONS ...

Страница 6: ...board I 1 1 1 3 Display I 2 1 1 4 Printing Mechanism I 2 1 1 5 Tape Cassette I 3 1 1 6 Tape Cutter I 4 1 1 7 Lettering Stick I 4 1 1 8 PC Interface not provided on the PT 550 530 USA versions I 4 1 2 ELECTRONICS SPECIFICATIONS I 8 1 2 1 Character Generator I 8 1 2 2 Power Supply I 8 ...

Страница 7: ... 221 x 253 x 87 mm 2 Weight Machine proper Approx 1 2 kg Approx 1 4 kg including batteries and a tape cassette In package Approx 3 2 kg 1 1 2 Keyboard 1 Entry system Rubber keypad 2 Number of alphanumeric and symbol keys 39 3 Number of function keys 23 excluding On Off key 4 Key arrangement See Figure 1 1 2 Unit mm ...

Страница 8: ... tapes laminate tape and non laminated tape or special tapes instant lettering tape non laminated thermal film tape iron on transfer tape and porous stamp tape Fixed print head and tape feeding mechanism 2 Print speed max 73 dots 10 3 mm per second 3 Print head Type Thermal print head Heat generator Consists of 128 heating elements vertically aligned Size of heating element 0 195 mm wide by 0 141 ...

Страница 9: ... tape cassette Iron on transfer tape cassette Iron on transfer tape and ink ribbon Stamp tape cassette Porous stamp tape and base paper 3 Tape size Width Length Laminate tape 6 9 12 18 24 8 m 36 mm 5 m for fluorescent coating tapes Non laminated tape 6 9 12 18 24 mm 8 m Instant lettering tape 18 mm 8 m Non laminated thermal film tape 12 18 mm 8 m Iron on transfer tape 18 mm 5 m Refill type Non lam...

Страница 10: ...ing Stick Mounted on the bottom of the machine 1 1 8 PC Interface not provided on the PT 550 530 USA versions 1 Interface cable Serial interface RS 232C cable for IBM AT AT or clones 2 Interface programs Editor and device driver for Windows version 3 1 and Windows 95 which are provided in a floppy disk ...

Страница 11: ...I 5 n PT 550 USA UK Figure 1 1 2 Key Arrangement 1 ...

Страница 12: ...I 6 Germany France Figure 1 1 2 Key Arrangement 2 ...

Страница 13: ...I 7 Belgium n PT 530 USA Figure 1 1 2 Key Arrangement 3 ...

Страница 14: ...es Optional AC line adapter 9 5 VDC 1 3A available 2 Battery type 8 alkaline batteries AA SIZE LR6 AM3 3 Service life of batteries Will last through one 24 mm wide tape cassette and then some by the DEMO print at room temperature and normal humidity 4 Automatic power off Yes If the machine remains unused for approx 5 minutes it automatically powers itself off 5 Low battery indication When the volt...

Страница 15: ...Chapter II MECHANISMS ...

Страница 16: ...oving the Blind Cover Power Supply PCB and Terminal Plates II 16 6 Removing the Chassis ASSY II 17 7 Removing the Cassette Sensor PCB II 20 8 Removing the Main PCB and Leading edge Sensor PCB II 21 9 Removing the Rubber Keypad and LCD Module II 22 10 Removing the Cover Open Switch II 23 2 2 2 Reassembly Procedure II 24 1 Installing the Cover Open Switch II 24 2 Installing the LCD Module and Rubber...

Страница 17: ...ected heating element s generates heat the ink on the sandwiched ribbon will be melted and transferred to the tape producing a dot s on the tape The ink ribbon and the tape are advanced and then the next heating cycle is repeated thus forming a character on the tape For non laminated thermal film tape cassettes If the selected heating element s generates heat the thermal film tape develops itself ...

Страница 18: ... n Character Formation While the main motor stepping motor feeds the tape and ink ribbon tape only when using non laminated thermal film tape cassettes or stamp tape cassettes by 0 141 mm for 13 8 ms the thermal head generates heat once The feed amount of 0 141 mm is smaller than the width 0 195 mm of the heating elements so that the heat generated at one heating cycle will overlap with the next h...

Страница 19: ...hermal head with the tape and ink ribbon only the tape when using non laminated 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...

Страница 20: ... and base paper when using laminated tape cassettes or stamp tape cassettes inbetween as described in Subsection 2 1 2 As the main 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 sandwiche...

Страница 21: ... As the main motor rotates the ribbon drive cam located at the middle of the gear train 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 and the ribbon drive cam the feed amount of the ribbon drive cam is slightly greater than that of the tape...

Страница 22: ...s of two processes printing process and tape rewinding process Printing process This process is the same as for the regular printing described in Subsection 2 1 3 except for the detection of the leading edge of the tape If the tape leading edge sensor signals that the leading edge of the tape passes through the light axis the CPU further rotates the main motor by the specified number of pulses fro...

Страница 23: ...e rewind spool in the refill type non laminated tape cassette YS 18 also rotates to rewind the tape into the cassette If the leading edge of the rewound tape passes through the tape leading edge sensor the CPU further rotates the motor to rewind the tape by the specified number of pulses from that detection moment This way the tape rewinding process is completed To print with the 2nd color you loa...

Страница 24: ...wise its boss X which is fitted in the opening of the movable blade actuates the movable blade to pivot it around shaft Y Consequently the cutter cuts the printed tape routing through the movable and stationary blades just like a scissors After that the CPU keeps the cutter motor on When the movable blade comes back to the home position its end Z activates the cutter sensor actuator which presses ...

Страница 25: ...ed below releasing the cassette cover Figure 2 1 8 Cover Open Switch 2 1 7 Cassette Cover Sensor The cassette cover sensor photosensor PH1 is provided on the main PCB Closing the cassette cover puts its sensor tab in the photosensor signaling that the cassette cover is closed Figure 2 1 9 Cassette Cover Sensor ...

Страница 26: ...vers 4 Be careful not to lose screws washers or other parts removed for parts replacement 5 Tighten screws to the torque values listed below n Tightening Torque List Location Screw type Q ty Tightening torque N cm kgf cm Bottom cover Taptite bind 3 x 8 4 38 2 4 Power supply PCB Taptite bind 2 6 x 6 2 29 4 3 Cutter unit Screw bind 3 x 5 2 58 8 6 Cutter motor Screw pan cup 2 6 x 3 5 2 39 2 4 Thermal...

Страница 27: ... Procedure 1 Removing the Tape Cassette and Cassette Cover 1 Slide the cover open switch to the left and open the cassette cover fully 2 Pull the tape cassette up and out of the machine Figure 2 2 1 Removing the Tape Cassette ...

Страница 28: ... cassette cover outwards and take off the cassette cover Figure 2 2 2 Removing the Cassette Cover 2 Removing the Lettering Stick 1 Turn the machine upside down 2 Pull out the lettering stick Figure 2 2 3 Removing the Lettering Stick ...

Страница 29: ...II 13 3 Removing the Battery Lid and Batteries 1 Press section A of the battery lid and remove it 2 Take out batteries Figure 2 2 4 Removing the Battery Lid and Batteries ...

Страница 30: ...ing the Bottom Cover 1 Turn the machine upside down 2 Remove four screws from the bottom cover 3 Apply your fingers to the rear end of the body cover and pull up the body cover Figure 2 2 5 Removing the Body Cover 1 ...

Страница 31: ...er supply harness and the PC interface harness provided on the PT 550 European versions only from the main PCB Figure 2 2 6 Removing the Body Cover 2 NOTE Check that the base feet see Figure 2 2 5 are tightly attached to the bottom cover without gap peeling off or overreaching ...

Страница 32: ... a pointed tool to release locking pawls p of the terminals from the bottom cover When handling those terminals do not grip the cords but the terminal plates 3 Remove two screws from the power supply PCB and then take it out together with the grounding plate 4 Pull out terminal plate a 5 Turn the bottom cover upside down and then remove terminal plates b with a pointed tool Figure 2 2 7 Removing t...

Страница 33: ... pulling the cable be sure to unlock the connector on the main PCB 3 Remove three screws from the chassis Figure 2 2 8 Removing the Chassis ASSY 4 Lift the chassis ASSY up and out of the body cover When placing the removed chassis ASSY on a table put a tape cassette or the like under the chassis ASSY to prevent the cutter unit from coming into direct contact with the flat surface as illustrated be...

Страница 34: ...and spring from the chassis 2 Remove two screws from the cutter unit and take it off 3 Remove the cutter rocking gear and cutter double gears Figure 2 2 10 Removing the Cutter Unit and its Related Parts Removing the cutter motor 1 Remove two screws from the cutter motor and take it off Figure 2 2 11 Removing the Cutter Motor ...

Страница 35: ...nhooking the release spring take care not to scratch the thermal print head and its cable 3 Remove two screws A and take off the thermal head ASSY CAUTION Do not loosen or remove screws B 4 Remove the release lever spring 5 Remove the retaining ring and take off the roller release lever 6 Remove the roller release rod and its roller Figure 2 2 12 Removing the Roller Holder ASSY Thermal Head ASSY a...

Страница 36: ... 2 2 13 Removing the Main Motor ASSY 7 Removing the Cassette Sensor PCB 1 Disconnect the cassette sensor cable from the main PCB Before pulling the cable be sure to unlock the connector on the main PCB 2 Pull the three latches outwards and remove the cassette sensor PCB Figure 2 2 14 Removing the Cassette Sensor PCB ...

Страница 37: ... sensor harness 3 Disconnect the FPC cable of the LCD module Before pulling the cable be sure to unlock the connector on the main PCB 4 Lift up the main PCB 5 Remove two screws from the leading edge sensor PCB and take off its harness routed through the body cover Figure 2 2 15 Removing the Main PCB and Leading edge Sensor PCB ...

Страница 38: ...e 1 Take out the rubber keypad from the body cover 2 Remove two screws from the LCD support and take it off 3 Remove the LCD module from its support by pulling one of two pawls with your fingers Figure 2 2 16 Removing the Rubber Keypad and LCD Module ...

Страница 39: ... 1 Remove the cover lock lever together with the spring from the body cover 2 Remove the spring from the cover lock lever 3 Press the locking pawls of the cover open switch inwards and take it off Figure 2 2 17 Removing the Cover Open Switch ...

Страница 40: ...o place and check that it moves smoothly 2 Fit the spring onto the cover lock lever and then set them to the body cover Hook the shorter end of the spring on the boss of the body cover as illustrated below 3 Check that the cover lock lever moves smoothly Figure 2 2 18 Installing the Cover Open Switch ...

Страница 41: ...LCD module in the LCD support by bending the pawls with your fingers 2 Secure the LCD support to the body cover with two screws Tightening torque 29 4 N cm 3 kgf cm 3 Place the rubber keypad on the body cover Figure 2 2 19 Installing the LCD Module and Rubber Keypad ...

Страница 42: ... below 3 Check that there is no foreign materials or dust on the contacts of the rubber keypad then place the main PCB 4 Secure the main PCB with three screws Tightening torque 29 4 N cm 3 kgf cm 5 Connect the FPC cable of the LCD module to the main PCB and then lock the connector 6 Connect the leading edge sensor harness to the main PCB Figure 2 2 20 Installing the Leading edge Sensor PCB and Mai...

Страница 43: ...t deformed 2 Fit the switch actuators into the holes provided in the body cover and push down the cassette sensor PCB until the three latches catch the PCB 3 Connect the cassette sensor cable to the main PCB and then lock the connector Figure 2 2 21 Installing the Cassette Sensor PCB ...

Страница 44: ... on the body cover taking care not to sandwich the harnesses between the body cover and the chassis ASSY Then secure the chassis ASSY with three screws Tightening torque 39 2 N cm 4 kgf cm 3 Connect the thermal head cable to the main PCB and lock the connector 4 Connect the cutter motor harness and main motor harness Figure 2 2 22 Installing the Chassis ASSY ...

Страница 45: ...the main motor ASSY 1 Put the main motor ASSY on the chassis and bring its edge into contact with the boss provided on the chassis Then secure the ASSY with two screws in the order of and Tightening torque 39 2 N cm 4 kgf cm Figure 2 2 23 Installing the Main Motor ASSY ...

Страница 46: ... end of the release lever spring on the roller release lever and the other end on the chassis 4 Secure the thermal head ASSY to the chassis with two screws Tightening torque 58 8 N cm 6 kgf cm 5 Set the release spring in the roller holder ASSY and secure them to the chassis with the retaining ring Take care not to let the release spring scratch the thermal head Figure 2 2 24 Installing the Roller ...

Страница 47: ...ng the Cutter Motor Installing the cutter unit and its related parts 1 Set the cutter sensor actuator and its spring on the chassis as illustrated below 2 Install the cutter double gears and cutter rocking gear 3 Secure the cutter unit with two screws Tightening torque 58 8 N cm 6 kgf cm Figure 2 2 26 Installing the Cutter Unit and its Related Parts ...

Страница 48: ...tween the PCB and bottom cover Tightening torque 29 4 N cm 3 kgf cm 4 Push the positive and negative terminals of the battery power cords into the bottom cover until terminals locking pawls p become fitted in the bottom cover When handling those terminals do not grip the cords but the terminal plates Make sure that the convex side of the positive terminal faces towards the battery mounting space 5...

Страница 49: ...ions only to the main PCB Figure 2 2 28 Installing the Body Cover 1 2 Align the front end of the body cover with that of the bottom cover then fit those covers together Take care not to pinch the cords between those covers 3 Place the machine upside down and secure the bottom cover with four screws Tightening torque 38 2 N cm 4 kgf cm Figure 2 2 29 Installing the Body Cover 2 ...

Страница 50: ...II 34 8 Installing the Batteries and Battery Lid 1 Load batteries 2 Fit the rear end of the battery lid into the bottom cover and push it down Figure 2 2 30 Installing the Batteries and Battery Lid ...

Страница 51: ...II 35 9 Installing the Lettering Stick 1 Snap the lettering stick into place Figure 2 2 31 Installing the Lettering Stick ...

Страница 52: ...over and Tape Cassette 1 Push the hinges of cassette cover outwards and fit them in the body cover Figure 2 2 32 Installing the Cassette Cover 2 Load a tape cassette and close the cassette cover Figure 2 2 33 Installing a Tape Cassette ...

Страница 53: ...During the demonstration print check that the machine prints data and then feeds and cuts the tape correctly If any problem is found go to the troubleshooting in Chapter IV 5 Open the cassette cover to check that it retracts the roller holder ASSY from the thermal head Close the cassette cover to check that it presses the roller holder ASSY against the thermal head 6 Check that pressing the keys c...

Страница 54: ...Chapter III ELECTRONICS ...

Страница 55: ... Sensor Circuit III 16 3 2 10 Leading edge Sensor Circuit PT 550 European versions only III 17 3 2 11 Thermal Print Head Control Circuit III 18 3 2 12 Cutter Sensor Circuit III 19 3 2 13 Voltage Detector Circuit and Temperature Sensor Circuit III 20 1 Voltage detector circuit III 20 2 Excessive high voltage AC adapter detector circuit III 20 3 Ambient temperature sensor circuit III 20 4 Head volta...

Страница 56: ... tape cassette Power Supply PCB This PCB generates the 5V and 12V from the unstabilized DC voltage supplied from batteries or the optional AC adapter through the 3 terminal regulator and the switching regulator respectively to feed the stabilized power to the main PCB On this PCB is also an interface circuit RS 232C n Motors Stepping motor and DC motor The stepping motor ø30 is a power source to a...

Страница 57: ...III 2 Figure 3 1 1 Control Electronics of PT 550 ...

Страница 58: ...ntacts matrix 5 Power ON OFF circuit and automatic powering off circuit 6 Motor driver circuit 7 Cassette sensor circuit 8 Cover sensor circuit 9 Leading edge sensor circuit PT 550 European versions only 10 Thermal print head control circuit 11 Cutter sensor circuit 12 Voltage detector circuit and temperature sensor circuit 13 Oscillator circuit 14 Reset circuit ...

Страница 59: ...III 4 Figure 3 2 1 Block Diagram of Main PCB ...

Страница 60: ...CPU M30622 is a 16 bit CMOS microprocessor which integrates a 3 kilobyte RAM The external data bus is 16 bits through which the CPU controls the ROM and RAMs The internal data bus is 16 bits Figure 3 2 2 CPU ROM and SRAMs ...

Страница 61: ... which stores control programs and character patterns 3 2 4 RAMs See Figure 3 2 2 This machine uses two 1 megabit SRAMs which are used as a print buffer program work area and text memory The data stored in these SRAMs are backed up by the batteries driving this machine ...

Страница 62: ... which functions as a switching element If a particular key is pressed the carbonic silicon rubber of the key short circuits the paired electric nodes carbon printed on the main PCB Figure 3 2 4 shows a key scan timing scheme and K00 K07 scanning pulse outputs The CPU scans the key contacts matrix every 16 ms If the CPU reads the same data on an input port four successive times it interprets the s...

Страница 63: ...der points 1 through 4 customize the machine for the destination Solder points A through D are reserved for the future use for the individual thermal head properties The CPU reads the solder point status once in the powering on sequence to recognize the customization Figure 3 2 5 Keypad and Solder Points ...

Страница 64: ...sequence quite different from other keys although the On Off key is on the same keypad Pressing the On Off key causes its bottom rubber contact to short circuit a pair of the key contact patterns printed on the main PCB making the base node input of transistor Q3 Low Accordingly Low signal is fed to pin 20 INT0 of the CPU signaling that the On Off key is pressed Figure 3 2 6 Power ON OFF Circuit ...

Страница 65: ...t receipt of the INT0 If the input is truly Low the CPU interprets the On Off key as being pressed and starts setting up the entire system The CPU turns the POW signal P86 High making the base node input of transistor Q5 High so as to keep supplying the Vcc power after the On Off key is released Figure 3 2 7 Powering on Sequence Powering off sequence See Figure 3 2 8 Pressing the On Off key when t...

Страница 66: ...machine with the power On Off key or you make no key entry for approx 5 minutes for approx 30 minutes when the machine uses the RS 232C interface the CPU turns the POW signal Low to shut down the Vcc which would normally feed power to the logic circuits except the CPU This way oscillation stops so as to feed no clock to the CPU ...

Страница 67: ...igh the motor rotates in the direction defined by the signals on P74 and P75 1 Printing in a constant speed For regular printing in a constant speed the CPU drives the motor at the rate of 144 pps To provide buffered starting and stopping for the motor the gradual acceleration and deceleration are programmed to consume 8 and 3 pulses respectively To rewind the tape of the color print cassette in c...

Страница 68: ... 27 the CPU activates the transistor array TA7291F 2 which drives the DC motor This circuit makes the motor rotate clockwise to cut tape and return the cutter to the home position If the motor overruns or a tape jam occurs the CPU makes the motor rotate counterclockwise The cutter home position is detected by the cutter sensor Figure 3 2 10 DC Motor Driver Circuit ...

Страница 69: ...e ID holes provided in the tape cassette If a certain ID hole is closed the corresponding sensor switch goes on To read the cassette sensor information the CPU turns its P81 KO9 High to gate the cassette sensor signal on its P90 through P97 KI0 through K7 With the states of those sensor switches the CPU identifies the tape width and ink ribbon type of the tape cassette as listed in Table 3 2 1 Fig...

Страница 70: ...mm Laminated tape cassette Stamp tape cassette M 0 1 0 0 0 Non laminated tape cassette 0 1 1 1 0 18 mm Laminated tape cassette Stamp tape cassette L 1 0 1 1 0 Non laminated tape cassette 1 0 0 0 0 Instant lettering tape cassette Iron on transfer tape cassette 1 1 1 0 1 24 mm Laminated tape cassette 1 0 1 1 1 Non laminated tape cassette 1 0 0 0 1 Non laminated thermal film tape cassette 1 0 0 1 1 3...

Страница 71: ...cover sensor is a transparent photosensor The CPU turns its P76 KO6 High to gate the cover sensor signal on its P67 COSENS If the sensor signal is Low the CPU interprets the cassette cover as being opened if High the CPU interprets it as being closed Figure 3 2 12 Cover Sensor Circuit ...

Страница 72: ...ge of the tape in color printing The CPU checks whether the tape is present or not at the tape leading edge sensor at three stages per issue of a motor drive pulse The CPU makes its P83 High to turn on the sensor LED and then reads the voltage level on P103 If the voltage level is Low the CPU recognizes that the tape is present Figure 3 2 13 Leading edge Sensor Circuit ...

Страница 73: ...re designed for 64 element control and cascaded with each other Synchronizing with the 2 MHz clock on pin 37 P61 CLK0 the CPU outputs serial print data containing 128 dot frame 8 x 16 bit map through pin 35 P63 TXD0 to the drivers printing 96 dot data in practice If the CPU runs out of control this circuit cuts off power to the thermal head after the specified time length by the CR time constant o...

Страница 74: ...tes the cutter sensor actuator which presses the cutter sensor switch to close the switch contact If the DC motor is driven the linked movable blade moves to cut tape releasing the cutter sensor to open the switch contact The CPU continues to run the DC motor until the switch contact closes again Figure 3 2 15 Cutter Sensor Circuit ...

Страница 75: ... completion of printing If it drops further below approx 3 5V the CPU immediately stops printing and shows the message REPLACE BATTERIES 2 Excessive high voltage AC adapter detector circuit When the AC adapter is plugged in this machine the CPU checks the input voltage at the powering on sequence and at the start of printing If the input voltage level exceeds approx 15 1V the CPU shows the CHANGE ...

Страница 76: ...III 21 Figure 3 2 16 Voltage Detector Circuit and Temperature Sensor Circuit ...

Страница 77: ... CPU divides this into half 6 MHz to synchronize its internal operations Figure 3 2 17 Oscillator Circuit 3 2 15 Reset Circuit Figure 3 2 18 shows the reset circuit This circuit prevents the CPU and logic circuitry from malfunctioning in powering on and off sequences or when the battery output drops abnormally Figure 3 2 18 Reset Circuit ...

Страница 78: ... adapter is plugged in pressing the On Off key raises the 5 source Vcc which feeds power to the logic circuitry When the Vcc reaches approx 4 2V point A in Figure 3 2 19 the reset IC PST600D Q2 operates to turn the RESET from Low to High When the power is cut off or the battery output drops so that the Vcc drops below approx 4 2V point B the RESET turns from High to Low Figure 3 2 19 Reset Timing ...

Страница 79: ... a screen data RAM designed for a dot matrix LCD capable of displaying characters and graphics According to control signals CSX R WX and A0 the driver chip temporarily stores bit mapped screen data sent from the CPU into the integrated RAM via 8 bit data bus KO0 KO7 and then it edits LCD drive signals Figure 3 3 1 LCD Driver Circuit ...

Страница 80: ...cuit only when driving the mechanisms thereby saving power When no power is required for those mechanisms the CPU cuts off Q5 by keeping the HPOW Low to protect them from unexpected powering Resistor R11 limits the current flowing into the stepping motor Figure 3 4 1 12V Power Supply Circuit 3 4 2 5V Power Supply Circuit Figure 3 4 2 shows the 5V power supply circuit A 3 terminal regulator S 81350...

Страница 81: ... off the power fed from the batteries and feeds power from the AC adapter Diode D1 protects the machine when a wrong polarity AC adapter is connected For the right polarity of the AC adapter plug refer to Figure 3 4 4 Fuse 1 works as an overcurrent protector Figure 3 4 3 AC Jack related Circuit Figure 3 4 4 Polarity of AC Adapter Plug ...

Страница 82: ...m the PC The driver ADM202 1 converts the RS 232C signal level to the TTL logic level The baud rate is fixed to 9600 bps The PC controls the data transfer by the dedicated driver program On the main PCB transistor Q6 switches power to the ADM202 1 If the machine enters the interface port mode the CPU turns pin 33 Low to feed power 5V to the ADM202 1 Figure 3 4 5 Interface RS 232C Circuit ...

Страница 83: ...Chapter IV TROUBLESHOOTING ...

Страница 84: ... IV 2 2 Printing failure IV 5 3 Powering failure Nothing appears on the LCD IV 8 4 No key entry possible IV 11 5 Abnormal LCD indication IV 12 6 Tape cassette type not identified IV 13 7 No color printing this applies to the PT 550 European versions only IV 14 8 Interface port failure this applies to the PT 550 European versions only IV 15 ...

Страница 85: ...edure after reviewing the relationship between them 2 When supplying power to this machine having problems from either a set of batteries or the AC line adapter make sure that its output voltage level is 11V to 13V under no load 3 When supplying power from a stabilized power unit use the power unit with approx 3A capacity and choose the output level of 11V to 13V When connecting it to this machine...

Страница 86: ...IV 2 4 1 3 Troubleshooting Flows 1 Tape feeding failure ...

Страница 87: ...IV 3 ...

Страница 88: ...IV 4 ...

Страница 89: ...IV 5 2 Printing failure ...

Страница 90: ...IV 6 ...

Страница 91: ...IV 7 ...

Страница 92: ...IV 8 3 Powering failure Nothing appears on the LCD ...

Страница 93: ...IV 9 ...

Страница 94: ...IV 10 ...

Страница 95: ...IV 11 4 No key entry possible ...

Страница 96: ...IV 12 5 Abnormal LCD indication ...

Страница 97: ...IV 13 6 Tape cassette type not identified ...

Страница 98: ...IV 14 7 No color printing this applies to the PT 550 European versions only ...

Страница 99: ...IV 15 8 Interface port failure this applies to the PT 550 European versions only ...

Страница 100: ...APPENDICES Circuit Diagrams A Main PCB B Power Supply PCB ...

Страница 101: ......

Страница 102: ...B Power Supply PCB ...

Страница 103: ......

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