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II

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[ 5 ] Installing the ON/OFF Button, FEED/CUT Button, and Sub PCB ASSY to the Front

Cover

(1) As illustrated below, insert the tabs of the reflection sheet in the two guide of the

ON/OFF button.

(2) Set the key return spring on the ON/OFF button and put them back into place.

(3) Set the key return spring on the FEED/CUT button and put them back into place.

(4) Secure the sub PCB ASSY with the two screws.

Fig. 2.2-28 Installing the ON/OFF Button, FEED/CUT Button, and Sub PCB ASSY

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Содержание PT-2500PC

Страница 1: ...SERVICE MANUAL MODEL PT 2500PC ...

Страница 2: ...SERVICE MANUAL MODEL PT 2500PC ...

Страница 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 ...

Страница 4: ...cerned persons to accurately and quickly provide after sale service for our PT 2500PC 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 TROUBL...

Страница 5: ...CHAPTER I SPECIFICATIONS ...

Страница 6: ...CAL SPECIFICATIONS I 1 1 1 1 External View I 1 1 1 2 Control Buttons I 2 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 3 1 1 7 PC Interface I 3 1 2 ELECTRONICS SPECIFICATIONS I 4 1 2 1 Power Supply I 4 ...

Страница 7: ...I 1 1 1 MECHANICAL SPECIFICATIONS 1 1 1 External View 1 Dimensions W D H 75 mm 232 mm 159 mm 2 Weight Machine proper Approx 1 0 kg In package Approx 2 4 kg Fig 1 1 1 External View ...

Страница 8: ...nsfer onto plastic tapes laminate tape and non laminate tape or special tapes instant lettering tape non laminate thermal film tape iron on transfer tape and porous stamp tape Fixed thermal print head and tape feed mechanism 2 Printing speed 10 3 mm sec 3 Print head Type Thermal print head Heat generator Consisting of 128 heating elements vertically aligned Size of a heating element 0 175 mm wide ...

Страница 9: ...ibbon Stamp tape cassette Porous stamp tape and base paper 3 Tape size Width Length Laminate tape 6 9 12 18 24 mm 8 m 5 m for fluorescent coating tapes Non laminate tape 6 9 12 18 24 mm 8 m Instant lettering tape 18 mm 8 m Iron on transfer tape 18 mm 8 m Porous stamp tape 18 mm 8 m 1 1 6 Tape Cutter 1 Tape cutting method Automatic cutter Not user replaceable 1 1 7 PC Interface 1 Transmission Seria...

Страница 10: ...I 4 1 2 ELECTRONICS SPECIFICATIONS 1 2 1 Power Supply 1 Power supply Dedicated AC line adapter 9 5 VDC 1 3A provided as attachment ...

Страница 11: ...CHAPTER II MECHANISMS ...

Страница 12: ... Mechanical Unit Together with the Cutter related Components II 17 7 Removing the Cutter related Components II 18 8 Removing the Roller Holder ASSY Thermal Head Unit and Tape Feed Motor from the Frame ASSY II 19 9 Removing the Main PCB ASSY and Power Supply PCB ASSY II 20 2 2 2 Reassembly Procedure II 21 1 Installing the Main PCB ASSY and Power Supply PCB ASSY II 21 2 Installing the Thermal Head U...

Страница 13: ...cassettes Instant lettering tape when using instant lettering tape cassettes Iron on transfer tape when using iron on transfer tape cassettes Porous stamp tape when using stamp tape cassettes When using non laminated thermal film tape cassettes no ink ribbon is sandwiched For tape cassettes except non laminated thermal film tape cassettes If the selected heating element s generates heat the ink on...

Страница 14: ... transfer tape cassettes the CPU processes the print data to generate a mirror image so that the printed character can be seen normally when viewed from the other side of the printed face of the tape n Character Formation While the tape feed 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 5 6 ...

Страница 15: ...the thermal 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 tap...

Страница 16: ...no tape cassette is loaded If you load a tape cassette the cassette edge presses the cassette rod to turn it clockwise when viewed from the top Engaged with the cassette rod the release lever tilts A in the illustration below so that closing the cassette cover presses the release lever at the lower end of box X Accordingly the roller holder ASSY pivots at a great angle pressing the platen against ...

Страница 17: ...se paper when using laminated tape cassettes or stamp tape cassettes inbetween as described in Subsection 2 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 ...

Страница 18: ...As the tape feed 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 ...

Страница 19: ... counterclockwise 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 w...

Страница 20: ...d below releasing the cassette cover Fig 2 1 7 Open Button 2 1 7 Cassette Cover Sensor The cassette cover sensor is provided on the sensor PCB If you close the cassette cover its sensor tab pushes down the sensor signaling that the cassette cover is closed Fig 2 1 8 Cassette Cover Sensor ...

Страница 21: ...x 5 2 58 8 9 8 6 1 Tape feed motor Screw pan M2 6 x 3 5 2 39 2 9 8 4 1 Cutter motor Screw pan M2 6 x 3 5 2 39 2 9 8 4 1 Cutter sensor ASSY Screw pan M1 7 x 6 1 19 6 9 8 2 1 Cutter ASSY Screw bind M3 x 5 2 58 8 9 8 6 1 Frame ASSY Taptite bind B M3 x 8 1 39 2 9 8 4 1 Tape end sensor ASSY Taptite bind B M2 6 x 8 1 39 2 9 8 4 1 Sensor PCB ASSY Taptite bind B M2 6 x 8 1 39 2 9 8 4 1 Cassette cover brac...

Страница 22: ...ut of the machine TIP Opening the cassette cover releases the platen from the thermal head providing you with enough space to replace the tape cassette Fig 2 2 1 Removing the Tape Cassette 2 Removing the Front Cover and Body Cover 1 Remove three screws a securing the front cover and two screws b securing the body cover Fig 2 2 2 Removing the Screws from the Body Cover ...

Страница 23: ...e sub PCB flat cable from the cable guide on the cover lock lever mounted on the inside the body cover Fig 2 2 3 Disconnecting the Front Cover 4 Disengage the body cover from the bottom cover NOTE Do not pull the body cover away from the bottom cover The sensor PCB flat cable and tape end sensor harness fixed to the body cover are connected to the main PCB mounted in the bottom cover Fig 2 2 4 Dis...

Страница 24: ...ess from the main PCB NOTE When disconnecting the harness connector hold the connector body not the cable 6 Disconnect the sub PCB flat cable from the main PCB Fig 2 2 5 Disconnecting the Sensor PCB Flat Cable Tape End Sensor Harness and Sub PCB Flat Cable from the Main PCB ...

Страница 25: ...he sensor PCB ASSY by removing the screw Fig 2 2 6 Removing the Tape End Sensor ASSY and Sensor PCB ASSY 4 Remove the screw from the cover lock lever 5 Unhook the lock lever spring from the boss provided on the body cover then take the cover lock lever and the spring out of the body cover 6 Remove the screw from the open button then press the latches inwards and push down the open button Fig 2 2 7...

Страница 26: ...e cover arm and remove the spring from the cassette cover bracket Fig 2 2 8 Twisting off the Cover Open Spring 2 Remove two screws each from the two cassette cover brackets 3 Remove the cassette cover brackets while pushing the cassette cover arms outwards Fig 2 2 9 Removing the Cassette Cover Brackets ...

Страница 27: ... fully 5 As shown below pull out the cassette cover arms from the body cover Fig 2 2 10 Removing the Cassette Cover 6 Remove the cassette hold spring by unhooking it in the order of ƒ and Fig 2 2 11 Removing the Cassette Hold Spring ...

Страница 28: ...nt cover by removing the two screws 2 Lift up the FEED CUT button together with the key return spring 3 Lift up the ON OFF button together with the key return spring and reflection sheet As illustrated below remove the reflection sheet from the button s guides Fig 2 2 12 Removing the Sub PCB ASSY FEED CUT Button and ON OFF Button ...

Страница 29: ... bottom cover 3 Disconnect the following from the main PCB Tape feed motor harness P5 Cutter sensor harness P3 Cutter motor harness P4 Head flat cable P8 NOTE Gently handle the harnesses and flat cable 4 Take the mechanical unit together with the cutter related components up and out of the bottom cover Fig 2 2 13 Removing the Mechanical Unit Together with Cutter related Components ...

Страница 30: ...ng a pin and take off the cutter moving gear and cutter double gears NOTE Once deformed excessively the washer becomes unusable and a new one should have to be put back in 3 Take off the cutter motor ASSY by removing two screws b 4 Take off the cutter sensor ASSY by removing screw c 5 Remove the cutter sensor actuator Fig 2 2 14 Removing the Cutter related Components ...

Страница 31: ...and the spring NOTE When unhooking the spring take care not to scratch the thermal print head and its flat cable 4 Remove two screws b and take off the thermal head unit CAUTION Do not loosen or remove screws X 5 Remove the retaining ring from the release lever then take out the release lever release rod and spring 6 Push the release rod roller out of the release rod 7 Remove two screws a and take...

Страница 32: ...om the main PCB 2 Remove the three screws from the main PCB ASSY and take it off 3 Remove the two screws from the power supply PCB ASSY Slightly lift up the inner edge of the PCB and take it out in the direction of the arrow as shown below Fig 2 2 16 Removing the Main PCB ASSY and Power Supply PCB ASSY ...

Страница 33: ...Fig 2 2 17 Installing the Main PCB ASSY 2 Fit the interface connector and DC jack of the power supply PCB into the cutouts provided in the bottom cover and then fit the notch over the rib on the bottom cover 3 Secure the power supply PCB ASSY with the two screws 4 Connect the power supply harness to the main PCB Fig 2 2 18 Installing the Power Supply PCB ASSY ...

Страница 34: ...ide shafts provided on the head frame 4 Install the release lever to the head frame so that hole a becomes fitted over the longer guide shaft on the head frame and boss b becomes fitted in the square hole in the release rod 5 Secure the release lever with the retaining ring 6 Hook the release lever spring over the release lever and head frame Fig 2 2 19 Installing the Release Rod and Release Lever...

Страница 35: ...e roller holder release spring scratch the thermal head and flat cable Fig 2 2 21 Installing the Roller Holder ASSY 9 Fit the arm of the cassette rod in the sector hole of the release lever and set the cassette rod on the shaft of the frame ASSY 10 Secure the cassette rod with the retaining ring 11 Put the tape feed motor on the frame ASSY and bring its edge into contact with the boss Then secure ...

Страница 36: ...II 24 12 Move the release lever up and down to make sure that the roller holder pivots smoothly Fig 2 2 23 Checking the Release Lever ...

Страница 37: ... Fig 2 2 24 Installing the Cutter Sensor Actuator and Cutter Sensor ASSY 3 As shown below set the cutter motor ASSY on the mechanical unit with the harness facing up While pulling up the motor secure it with the two screws 4 Set the cutter double gears and cutter moving gear in place then fit the washer in the cutter moving gear Fig 2 2 25 Installing the Cutter Motor ASSY ...

Страница 38: ... hole provided in the moving blade becomes fitted over the boss of the cutter moving gear WARNING Be careful with the cutter blades 6 Apply grease Silicon grease G501 to the inside edge of the long hole provided in the moving blade Fig 2 2 26 Installing the Cutter ASSY ...

Страница 39: ...CB 2 Put the mechanical unit into place 3 Align the frame edge below the cutter motor with the rib of the bottom cover then secure the mechanical unit with the screw 4 Secure the grounding wire to the frame with the screw 5 Connect the following harnesses to the main PCB Cutter motor harness P4 Cutter sensor harness P3 Tape feed motor harness P5 Fig 2 2 27 Installing the Mechanical Unit ...

Страница 40: ...he reflection sheet in the two guide of the ON OFF button 2 Set the key return spring on the ON OFF button and put them back into place 3 Set the key return spring on the FEED CUT button and put them back into place 4 Secure the sub PCB ASSY with the two screws Fig 2 2 28 Installing the ON OFF Button FEED CUT Button and Sub PCB ASSY ...

Страница 41: ...into the hole Fit the coil over the rib ƒ Fit the coil over the rib Insert the short spring end into the hole Fig 2 2 29 Setting the Cassette Hold Spring 2 Place the body cover rightside up 3 Insert the arms of the cassette cover into the openings provided in the body cover 4 Close the cassette cover Fig 2 2 30 Installing the Cassette Cover ...

Страница 42: ... 2 2 31 Setting the Cassette Cover Brackets 7 Set the cover open spring to the right hand cassette cover bracket Hook short end a of the spring on the bracket and long end b on the cassette cover arm as shown below 8 Secure the cassette cover brackets with the four screws Fig 2 2 32 Setting the Cover Open Spring and Securing the Cassette Cover Brackets ...

Страница 43: ...ck lever spring on the cover lock lever and install them on the body cover so that the square opening becomes fitted over the boss of the open button 3 Hook the lock lever spring on the boss provided on the body cover 4 Secure the cover lock lever with the screw 5 Apply grease Silicone grease G501 to the square opening of the cover lock lever and boss of the open button Fig 2 2 33 Installing the O...

Страница 44: ... the screw Route the flat cable as illustrated below 7 Secure the tape end sensor ASSY with the screw Route the lead wires through the grooves of the rib as illustrated below Fig 2 2 34 Installing the Sensor PCB ASSY and Tape End Sensor ASSY ...

Страница 45: ...own below then connect the sensor PCB flat cable and tape end sensor harness to the main PCB NOTE Insert the cable end into the connector with the solder side facing towards the power supply PCB Fig 2 2 35 Connecting the Sub PCB Flat Cable Sensor PCB Flat Cable and Tape End Sensor Harness 4 Align the four holes provided in the body cover with the four poles provided on the frame ASSY then fit the ...

Страница 46: ...ovided on the cover lock lever 6 Install the front cover to the body cover and bottom cover 7 Secure the front cover with three screws a and the body cover with two screws b Fig 2 2 37 Routing the Sub PCB Flat Cable and Securing the Front Cover and Body Cover ...

Страница 47: ...II 35 9 Loading a Tape Cassette 1 Load a tape cassette and close the cassette cover Fig 2 2 38 Loading Tape Cassette ...

Страница 48: ...Check that the ON OFF button operates correctly n ON OFF lamp states and machine status ON OFF lamp Machine status Illuminates in green In the standby mode for data reception Flashes in green The machine has received data Illuminates in orange No tape cassette is loaded when the machine is in the standby mode The cassette cover is opened when the machine is receiving data but does not start printi...

Страница 49: ...CHAPTER III ELECTRONICS ...

Страница 50: ...Related Circuits III 5 3 2 4 Tape Feed Motor Drive Circuit III 6 3 2 5 Cutter Motor Drive Circuit III 7 1 Circuit operation III 8 2 Error processing III 8 3 2 6 Cassette Sensor Circuit III 9 3 2 7 Thermal Head Control Circuit III 10 3 2 8 Head Voltage Detection Circuit and Ambient Temperature Detection Circuit III 11 3 2 9 Oscillation Circuit III 12 3 2 10 Tape End Sensor Circuit III 12 3 2 11 Swi...

Страница 51: ...ics consists of the components given below Fig 3 1 1 Control Electronics of PT 2500PC 3 1 1 Main PCB The main PCB controls all electronic operations This PCB consists of a CPU RAM EEPROM and motor drivers 3 1 2 Power Supply PCB This PCB generates the 5 VDC and 12 VDC from the unstabilized DC voltage supplied through the AC line adapter ...

Страница 52: ...D CUT button and the ON OFF switch ON OFF button with the lamp green and red LEDs 3 1 6 Cutter Sensor The cutter sensor is a mechanical switch which detects the home position of the cutter 3 1 7 Cutter Motor The cutter motor is a DC motor which drives the cutter to cut the tape This motor operates on 12V 3 1 8 Tape Feed Motor The tape feed motor is a Ø30 stepping motor which drives the tape feedin...

Страница 53: ...ntrol circuit FEED CUT switch ON OFF circuit and LEDs ON OFF circuit 5 Cutter motor drive circuit and tape feed motor drive circuit 6 Cassette sensor circuit cover open sensor circuit cutter sensor circuit and tape end sensor circuit 7 Head property detection circuit 8 Head voltage detection circuit and ambient temperature detection circuit 9 Oscillation circuit 10 Reset circuit Fig 3 2 1 Block Di...

Страница 54: ...AM is a 32 kilobyte SRAM 4 which is used as a data buffer 3 ROM EEPROM The ROM is a 1 kilobit EEPROM 1 which stores the transmission speed and mechanical information 3 2 2 Solder Points Fig 3 2 2 shows a circuit diagram relating to solder points Solder points A to C are soldered according to the resistance property of the thermal head The CPU reads the status of the solder points once in the power...

Страница 55: ... turn the RESET signal from Low to High starting the CPU to run The CPU initializes its ports and then enters the sleep mode power off Pressing the ON OFF switch in the sleep mode causes NMI interrupt to start the CPU Pressing the ON OFF switch with power on places the CPU in the sleep mode Power off To drive the mechanism the CPU turns P83 High to turn on Q5 FET on the power supply PCB supplying ...

Страница 56: ...7774F 2 When P106 is High the motor rotates in the direction defined by the signals on P104 and P105 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 2 Printing interrupt margin...

Страница 57: ...otor is a DC motor The CPU 3 activates the transistor array TA7291F 5 through P86 and P87 to drive the cutter motor Table 3 2 1 shows the motor control logic Fig 3 2 4 Cutter Motor Drive Circuit Fig 3 2 5 Cutter Sensor Circuit Table 3 2 1 Motor Control Logic State P86 P87 On standby 0 0 Clockwise rotation 1 0 Counterclockwise rotation 0 1 Braking 1 1 ...

Страница 58: ...ay when the sensor level goes High or Low the CPU rotates the DC motor clockwise or counterclockwise respectively If the sensor level remains Low for 100 ms when the brake is applied the CPU judges that the cutter stops in the home position If the cutter lies out of the home position due to abnormal end of the previous operation the CPU rotates the DC motor counterclockwise to return the cutter to...

Страница 59: ...bon type of the tape cassette as listed in Table 3 2 2 Fig 3 2 6 Cassette Sensor Circuit Table 3 2 2 Coded Values for Identifying Tape Cassette 1 Switch ON ID hole closed 0 Switch OFF ID hole opened Cassette type SW1 SW2 SW3 SW4 SW5 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 and iro...

Страница 60: ...signed for 64 element control Synchronizing with the clock on P61 the CPU outputs serial print data containing 128 dot frame 8 x 16 bit map through P63 to the drivers If the CPU runs out of control this circuit cuts off the strobe signal P80 to the thermal head after the specified time length by the CR time constant of C17 R46 Fig 3 2 8 shows the head drive timing scheme Fig 3 2 7 Thermal Head Con...

Страница 61: ...s down the power source VH and then feeds the output to the analog input port AN1 of the CPU According to the sensed voltage the CPU controls the STR pulse width 2 Ambient temperature detection circuit This circuit consists of thermistor TH2 which is pulled up to Vcc through resistor R25 It converts the resistance of the thermistor which will vary depending upon the ambient temperature to the volt...

Страница 62: ...ig 3 2 10 Oscillation circuit 3 2 10 Tape End Sensor Circuit Fig 3 2 11 shows the tape end sensor circuit To detect the tape end the CPU monitors the voltage level on AN2 If the zebra tape black transparent provided at the end of tape passes through the tape end photosensor the CPU recognizes that the tape runs out according to the voltage change Fig 3 2 11 Tape End Sensor Circuit ...

Страница 63: ...show the machine status by illuminating or flashing For the relationship between the LED states and machine status refer to Chapter II Section 2 2 2 10 Fig 3 2 12 Switches LEDs Circuit 3 2 12 Cover Open Sensor Circuit Fig 3 2 13 shows the cover open sensor circuit which detects whether the cassette cover is opened or closed When the cassette cover is closed the sensor input level is Low when it is...

Страница 64: ...first applied or cut off Plugging the AC line adapter in the DC jack raises the Vcc which feeds power to the CPU and the logic circuitry When the Vcc reaches approx 4 2V point A in Fig 3 2 15 the reset IC S 80842ANUP Q2 operates to turn the RESET from Low to High When the power is cut off so that the Vcc drops below approx 4 2V point B the RESET turns from High to Low Fig 3 2 14 Reset Circuit Fig ...

Страница 65: ... cutter motor A closed loop comprising Q1 Q2 R2 R4 and C4 forms a self running oscillator Zener diode ZD1 and Q4 regulate the output voltage A around 12V The CPU turns the HPOW signal High to apply power to this circuit only when driving the mechanisms thereby saving power When no power is required for those mechanisms the CPU cuts off Q5 FET by keeping the HPOW Low to protect them from unexpected...

Страница 66: ...12V fed from the 12V source this is to supply the stabilized power to the logic circuitry even when the AC line adapter output drops abnormally Fig 3 3 2 5V Power Supply Circuit 3 3 3 DC Jack related Circuit Fig 3 3 3 shows the circuit around the DC jack Diode D1 protects the machine when a wrong polarity AC line adapter is connected For the right polarity of the AC line adapter plug refer to Fig ...

Страница 67: ...ls to the RS 232C compliant signals 12V and 12V and vice versa RXD is an input signal line to receive print data from the connected PC which enables high transmission rate up to 115 2 Kbps TXD and DTR are control signals to be outputted to the PC When the machine is powered on the POW signal line goes Low turning transistor Q8 on and feeding Vcc power to the driver IC 1 Fig 3 3 5 Interface Circuit...

Страница 68: ...CHAPTER IV TROUBLESHOOTING ...

Страница 69: ... 2 TROUBLESHOOTING FLOWS IV 2 1 Printing failure with particular dots missing IV 2 2 Tape cassette type not identified IV 2 3 The ON OFF lamp LEDs will not come on IV 3 4 No printing is performed IV 3 5 Interface malfunctions IV 4 6 No tape cutting IV 4 7 Tape feeding error IV 5 ...

Страница 70: ...e 2 If a printing problem occurs unplug the thermal head flat cable and check the thermal head and related circuits Until they come to operate normally do not plug the thermal head flat cable 3 To supply power to the machine use the dedicated AC line adapter If you need to use a regulated DC power supply its specifications should be 11 to 13 VDC variable with minimum 5A supply ...

Страница 71: ...IV 2 4 2 TROUBLESHOOTING FLOWS 1 Printing failure with particular dots missing 2 Tape cassette type not identified ...

Страница 72: ...IV 3 3 The ON OFF lamp LEDs will not come on 4 No printing is performed ...

Страница 73: ...IV 4 5 Interface malfunctions 6 No tape cutting ...

Страница 74: ...IV 5 7 Tape feeding error ...

Страница 75: ...IV 6 ...

Страница 76: ...APPENDICES Circuit Diagrams A Main PCB B Power Supply PCB ...

Страница 77: ...A V S S 4 7 K R T 1 N 1 4 4 C 0 V M A I N A N 3 A D D R E S S B U S A S P 1 C S P 3 4 7 K 4 7 K L E D 2 D T A 1 4 3 Z K 1 2 3 4 5 7 1 2 3 4 5 6 C O V 3 VSS 1 0 K R X D 1 A V S S V C C A V S S 1 3 1 2 1 7 9 4 C 7 1 0 4 N C 0 V V C C F E E D V C C V H 0 V E 0 V S S E 2 E 1 V C C S C L S D A N C 3 8 2 1 4 6 5 7 V C C 0 V 1 0 K 1 0 C L K V D D G N D G N D C O M C O M D I L A T 1 4 5 7 2 8 3 V H R E T ...

Страница 78: ...V N C 2 6 7 1 A D M 2 0 2 1 3 4 5 1 0 1 1 1 2 9 8 1 3 1 4 7 6 2 1 6 1 5 V V T 2 O U T T 1 O U T R 1 I N R 2 I N C 1 C 1 C 2 C 2 T 2 I N T 1 I N R 1 O U T R 2 O U T V C C G N D 8 4 1 3 5 R X D S H E L L G N D D T R T X D R X D V M 4 7 K 1 0 K 4 7 K 1 0 K J W 4 J W 3 J W J W 5 J W J W 6 J W J W 2 J W 0 V N C J W 1 J W R 8 J W NAME CODE Power Supply PCB Circuit Diagram TZPC UT2408000 B Power Supply P...

Страница 79: ...Nov 98 5V2086BE0 Printed in Japan ...

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