Brother P-Touch PT-1850 Page 26 Service Manual Download

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II-11

2.3

MAIN PCB

2.3.1

Block Diagram

Fig. 2.3-1 shows a block diagram of the main PCB. The main PCB consists of the following:

(1)

CPU

(2)

ROM (Masked)

(3)

Key contacts matrix and solder points

(4)

Power ON/OFF circuit and power saving circuit

(5)

DC motor driver circuit

(6)

Cutter motor driver circuit (PT-1900/1910)

(7)

Thermal head drive circuit

(8)

Voltage detector circuit and temperature sensor circuit

(9)

Cassette sensor circuit

(10)

Cutter sensor circuit

(11)

Oscillator circuit

(12)

Reset circuit

(13)

LCD driver circuit

(14)

Navi dial (PT-1850)

Fig. 2.3-1 Block Diagram of Main PCB

Summary of Contents for P-Touch PT-1850

Page 1: ...SERVICE MANUAL MODEL PT 1900 1910 1850 ...

Page 2: ... 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 GENERAL MECHANISMS CHAPTER III DISASSEMBLY REASSEMBLY PROCEDURE CHAPTER IV TROUBLESHOOTING AND ERROR MESSAGE APPENDIX 1 CIRCUIT DIAGRAMS Copyright Brother 2002 All rights rese...

Page 3: ...stration Print I 10 CHAPTER II GENERAL MECHANISMS II 1 2 1 MAIN MECHANISM II 1 2 1 1 Print Mechanism II 1 2 1 2 Roller Holder ASSY Setting Retracting Mechanism II 3 2 1 3 Tape Ribbon Feed Mechanism II 4 2 1 4 Automatic Tape Cutter Mechanism PT 1900 1910 II 6 2 1 5 Tape Cutter Mechanism PT 1850 II 7 2 1 6 Roller Holder ASSY Cassette Cover Interlocking Mechanism II 8 2 2 OUTLINE OF CONTROL ELECTRONI...

Page 4: ...Removing the Blind Cover III 18 8 Removing the Power Supply PCB III 19 9 Removing the Battery Terminals III 20 3 2 REASSEMBLY PROCEDURE III 21 1 Installing the Battery Terminals III 21 2 Installing the Power Supply PCB III 22 3 Installing the Blind Cover III 24 4 Installing the Switch ASSY III 25 5 Installing the Rubber Key Pad III 26 6 Installing the Main PCB Unit III 27 7 Installing the Main Fra...

Page 5: ...2 Printing failure IV 4 3 Powering failure Nothing appears on the LCD IV 6 4 No key entry possible IV 8 5 Tape cutting failure IV 9 6 Abnormal LCD indication IV 10 7 Tape cassette type not identified IV 11 4 2 ERROR MESSAGE IV 12 4 2 1 Error Message List IV 12 Appendix 1 CIRCUIT DIAGRAMS Appendix 1 A Main PCB CIR 1900 PT 1900 1910 Appendix 1 B Main PCB CIR 1850 PT 1850 Appendix 1 C Sub PCB ...

Page 6: ...PT 1900 1850 1 Dimensions W x D x H 181 x 232 5 x 61 4 mm 7 13 x 9 15 x 2 42 2 Weight Machine proper Approx 800 g In package Approx 1 31 kg PT 1900 U S A AUS Approx 1 35 kg PT 1900 CANADA 1850 Approx 2 7 kg PT 1910 1850cc including batteries a tape cassette and user s manual PT 1900 1910 PT 1850 ...

Page 7: ... on transfer tape and porous stamp tape Fixed print head and tape feeding mechanism 2 Print speed 10 mm second Typical 3 Print head Type Thermal print head Heat generator Consists of 112 heating elements vertically aligned PT 1850 128 heating elements Size of heating element 0 195 mm 7 7 mils wide by 0 141 mm 5 6 mils high 4 Character size Character size Height x Width dots Size 6 1 55 mm x 1 13 m...

Page 8: ... Stamp tape cassette Porous stamp tape and base paper Cloth tape cassette Cloth tape and ink ribbon 3 Tape size Width Length Laminate tape 6 9 12 18 mm 8 m 5 m for the fluorescent coating tape Non laminate tape 6 9 12 18 mm 8 m Iron on transfer tape 18 mm 6 m Porous stamp tape 18 mm 3 m Cloth tape 12 mm 4 m Cleaning tape 18 mm 4 Tape cassette packed with the machine Laminated tape cassette contain...

Page 9: ...I 4 PT 1900 U S A CANADA PT 1910 U S A Fig 1 1 2 Key Arrangement 1 ...

Page 10: ...I 5 PT 1900 AUSTRALIA Fig 1 1 2 Key Arrangement 2 ...

Page 11: ...I 6 PT 1850 FRENCH Fig 1 1 2 Key Arrangement 3 ...

Page 12: ...I 7 PT 1850 GERMAN Fig 1 1 2 Key Arrangement 4 ...

Page 13: ...I 8 PT 1850 U K Fig 1 1 2 Key Arrangement 5 ...

Page 14: ...I 9 PT 1850 BELGIUM Fig 1 1 2 Key Arrangement 6 ...

Page 15: ...aracters PT 1900 1910 1850 File memory 300 characters PT 1900 1910 1850 1 2 2 Power Supply 1 Automatic power off Yes Normal mode 5 min 30 sec 1 3 KEY COMMANDS FOR SPECIAL FUNCTIONS 1 3 1 Initializing Powering on the machine with both the Code and R keys held down will initialize the machine 1 3 2 Demonstration Print Pressing the D key with the Code key held down will start demonstration print This...

Page 16: ...t lettering tape cassettes Non laminated thermal film tape when using non laminated thermal film tape cassettes Iron on transfer tape when using iron on transfer tape cassettes Cloth tape when using cloth tape cassettes When using non laminated thermal film tape cassettes or stamp tape cassettes no ink ribbon is sandwiched For tape cassettes except non laminated thermal film tape cassettes and sta...

Page 17: ... 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 3 Character Formation While the DC motor feeds the tape and ink ribbon only the tape when using non laminated thermal film tape cassettes or stamp tape cassettes by 0 141 mm the thermal head generates heat once The feed amount is decided by sending each five pulses of ...

Page 18: ...er and lower 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 sandwiched inbetween under a uniform load by the roller holder upper spring and roller holder lower spr...

Page 19: ...ia the gear train to the tape idle gear which rotates the tape feed sub roller gear and the platen idle gear which rotates the tape feed platen gear Accordingly the sandwiched tape and ink ribbon will be advanced When a laminated tape cassette is mounted the sandwiched laminate tape and adhesive base tape and ink ribbon will be advanced together The feeding amount of the platen is slighty less tha...

Page 20: ...ar 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 feed gear The difference between the tape feed speeds at the platen and at the...

Page 21: ...vable 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 the cutter sensor The moment the CPU receives the sensor...

Page 22: ...ed tape routing through the movable and stationary cutters just like a scissors Attached to the cutter lever the cutter sensor arm turns up so that its tip comes into contact with the switch of the cutter sensor circuit on the cutter sensor holder ASSY stopping printing and tape feeding Fig 2 1 6 Tape Cutter Mechanism PT 1850 Switch Cutter sensor arm Cutter lever Movable cutter Stationary cutter ...

Page 23: ...g Retracting Mechanism the roller release lever shifts the roller holder release rod so that the roller holder ASSY is pressed towards the head ASSY side Fig 2 1 7 Roller Release Lever and Roller Holder Release Rod Main frame ASSY Platen roller Roller holder release spring Roller holder release rod Roller holder release rod Roller release lever Tape feed sub roller Roller holder ASSY Roller releas...

Page 24: ...pulls up the roller release lever placed in the hooked section of the cassette cover which shifts the roller holder release rod so that the roller holder ASSY is retracted from the head ASSY side by the roller holder release spring Hooked section Cassette cover Cassette cover Cassette cover Cassette cover Hooked section ...

Page 25: ...s has electrolytic capacitors as filters for output lines an AC adapter jack battery terminal plates and other related electronic devices to feed power to the control electronics and the DC motors from the AC adapter or batteries Note When mounting the chips onto the PCB use the lead free solder 2 2 4 Cassette Sensor This supports the sensors that detect the tape width and ink ribbon type in the t...

Page 26: ...points 4 Power ON OFF circuit and power saving circuit 5 DC motor driver circuit 6 Cutter motor driver circuit PT 1900 1910 7 Thermal head drive circuit 8 Voltage detector circuit and temperature sensor circuit 9 Cassette sensor circuit 10 Cutter sensor circuit 11 Oscillator circuit 12 Reset circuit 13 LCD driver circuit 14 Navi dial PT 1850 Fig 2 3 1 Block Diagram of Main PCB ...

Page 27: ...gnize the customization Country Display The country display displays the country specifications as designated by the solder points 1 to 5 Country Specification LCD Display Solder Points 1 2 3 4 5 U S A CAN AUS US U K UK GERMAN GE FRENCH FR BELGIUM BE Head Rank Display The head rank display displays the rank as designated by the solder points A to C The rank B is difined ad the setting for no solde...

Page 28: ...and the thermal print head and motor drive sources Connecting the AC adapter plug with the AC jack J1 cuts off the power fed from the batteries and feeds power from the AC adapter Fig 2 4 1 hows the polarity of the AC adapter plug Fig 2 4 1 AC Adapter Plug ...

Page 29: ...PROCEDURE 1 Removing the Battery Lid and Batteries 1 Turn the machine upside down 2 Press section A of the battery lid to remove then take out batteries Fig 3 1 1 Removing the Battery Lid and Batteries Section A Bottom cover Battery lid Bottom cover Batteries ...

Page 30: ...parator Stick 1 Place the machine rightside up and open the cassette cover fully 2 Pull the tape cassette up and out of the machine PT 1900 1910 PT 1850 Fig 3 1 2 Removing the Tape Cassette Cassette cover Tape cassette Tape cassette Cassette cover ...

Page 31: ...III 3 3 Pull the tape separator stick up PT 1900 1910 PT 1850 Fig 3 1 3 Removing the Tape Separator Stick Tape separator stick Hook Tape separator stick Hook ...

Page 32: ...ing down section B 2 Turn the machine upside down 3 Remove four screws from the bottom cover 4 Apply your fingers to the bottom cover and pull it up PT 1900 1910 Fig 3 1 4 Removing the Bottom Cover 1 PT 1900 1910 Cassette cover Section B Section B Screws Bottom cover Screws ...

Page 33: ...III 5 PT 1850 Fig 3 1 5 Removing the Bottom Cover 1 PT 1850 Cassette cover Section B Section B Bottom cover Screws Screws ...

Page 34: ...es the grounding wire to the main frame ASSY PT 1900 1910 PT 1850 Fig 3 1 6 Removing the Bottom Cover 2 Note Check that the lower feet are tightly attached to the bottom cover without any gaps peeling off or overreaching Grounding wire Screw Main PCB unit Main PCB unit Condenser C1 Front Flat screwdriver Upper cover Power supply harness Bottom cover Main PCB unit Main PCB unit Condenser C1 Flat sc...

Page 35: ...ring the following job handle the connectors and harnesses gently so as not to damage them 1 Take off the cassette cover from the upper cover The roller release lever will pop up Fig 3 1 7 Removing the Cassette Cover Upper cover Roller release lever Cassette cover ...

Page 36: ... unit Note However if only the main frame ASSY is removed the soldered switch ASSY must not be removed PT 1900 1910 PT 1850 Fig 3 1 8 Removing the Main Frame ASSY 1 Main PCB unit Main frame ASSY Switch ASSY harness Upper cover Main PCB unit Switch ASSY harness Upper cover Main frame ASSY ...

Page 37: ...ss the DC motor PCB by melting the solder DC motor harness 6 Disconnect the head cable from the main PCB unit 7 Remove the two screws of the main frame ASSY 8 Lift the main frame ASSY up and out of the upper cover PT 1900 1910 Fig 3 1 9 Removing the Main Frame ASSY 2 PT 1900 1910 Main PCB unit Upper cover Cutter motor harness Full cutter sensor harness Head cable DC motor harness Main frame ASSY S...

Page 38: ...he cutter lever from the upper cover PT 1850 only PT 1850 Fig 3 1 10 Removing the Main Frame ASSY 2 PT 1850 Main PCB unit Upper cover Cutter sensor harness Head cable DC motor harness Cutter lever Main frame ASSY Screws ...

Page 39: ...Main Frame ASSY 3 Head cable Full cutter sensor harness Cutter motor harness Main PCB unit Switch ASSY harness DC motor harness Power supply harness Power supply harness Cutter sensor harness Main PCB unit DC motor harness Head cable Switch ASSY harness ...

Page 40: ...oller holder release rod making sure that the roller holder release spring does not go flying off 3 Remove screw from the head ASSY then take off the ASSY PT 1900 1910 PT 1850 Fig 3 1 12 Disassembling the Roller Holder ASSY and Head ASSY Screw Roller holder release spring Retaining ring Main frame ASSY Roller holder release rod Head ASSY Roller holder ASSY Roller release lever Screw Roller holder ...

Page 41: ...III 13 Removing the DC motor ASSY 1 Remove two screws from the main frame ASSY then take off the DC motor ASSY Fig 3 1 13 Removing the DC Motor ASSY Screw Main frame ASSY Screw DC motor ASSY ...

Page 42: ...mes unusable and a new one should have to be put back in 3 Remove two screws b and take off the cutter motor ASSY taking care not to damage the motor gear 4 Remove screw c and take off the full cutter sensor PRO ASSY 5 Turn the actuator counterclockwise and remove it from the chassis ASSY 2300 PT 1900 1910 Fig 3 1 14 Removing the Cutter ASSY PT 1900 1910 Chassis ASSY 2300 Cutter moving gear Washer...

Page 43: ... the cutter ASSY from the chassis ASSY 1850 CAUTION To remove the screw b push down the left end of the movable cutter to turn it counterclockwise taking care not to push it down excessively or let the left end of the spring touch the cutting edge of stationary cutter PT 1850 Fig 3 1 15 Removing the Cutter ASSY PT 1850 Chassis ASSY 1850 Cutter sensor arm Spring Hooks Screw b Cutter ASSY Cutter sen...

Page 44: ...move the DC motor PCB from the upper cover 2 Unhook the two latches to release the main PCB unit 3 Pull the positions A outwards to pull the LCD with the main PCB unit in the direction of the arrow shown in the figure below and remove the main PCB unit PT 1900 1910 PT 1850 Fig 3 1 16 Removing the Main PCB Unit and DC Motor PCB 1 A Screw DC motor PCB Main PCB Screws Main PCB unit Latch LCD Latch Up...

Page 45: ...ving the Main PCB Unit and DC Motor PCB 2 5 Lift up the rubber key pad 6 Remove the emblem from the upper cover PT 1900 1910 PT 1900 1910 PT 1850 Fig 3 1 18 Removing the Rubber Key Pad DC motor PCB Main PCB Navi dial Upper cover Rubber key pad Emblem Rubber key pad Upper cover ...

Page 46: ...itch ASSY from the upper cover by pulling the three pawls outwards Fig 3 1 19 Removing the Switch ASSY 7 Removing the Blind Cover Remove the blind cover from the bottom cover by pulling the three pawls outwards Fig 3 1 20 Removing the Blind Cover Upper cover A Pawls Switch ASSY Pawl Bottom cover Blind cover Pawl Pawl ...

Page 47: ...cords from the bottom cover Note When handling those terminals do not grip the cords but the terminal plates 2 Remove the one screw from the power supply PCB Fig 3 1 21 Removing the Power Supply PCB Negative terminal Screw Power supply PCB Grounding wire Power supply harness Positive terminal Bottom cover ...

Page 48: ...n below left 2 As shown below right remove the battery terminal B while pressing section A with the tip of a flat screwdriver Fig 3 1 22 Removing the Battery Terminals Battery terminal A Section A Flat screwdriver Battery terminal B Section A Bottom cover Battery terminal B Front ...

Page 49: ...and fit battery terminal A into the bottom cover as shown below left Make sure that pawled sections A catches the bottom cover 2 Fit a battery terminal B into the bottom cover as shown below right Fig 3 2 1 Installing the Battery Terminals Section A Battery terminal A Battery terminal B Bottom cover Front ...

Page 50: ...ut the terminal plates Note 2 Route the battery power cords through the two ribs provided on the bottom cover Refer to Fig 3 2 3 2 Secure the power supply PCB to the bottom cover with one screw Tightening torque 294 98 mN m 3 1 kgf cm Fig 3 2 2 Installing the Power Supply PCB 1 Grounding wire Rib Rib Bottom cover Positive terminal Negative terminal Power supply harness Power supply PCB Screw ...

Page 51: ...III 23 Fig 3 2 3 Installing the Power Supply PCB 2 ...

Page 52: ... of the blind cover over the pins provided on the bottom cover and push down the blind cover until pawls B catch the hooks on the bottom cover Fig 3 2 4 Installing the Blind Cover Pins Blind cover Pawl B Hook Pawl B Hook Hook Pawl B Bottom cover Holes A ...

Page 53: ...hree pawls of the upper cover completely 2 Hook the switch ASSY harness into the two ribs on the upper cover Fig 3 2 5 Installing the Switch ASSY 2 Press and release each of those switch ASSY with your finger to check that they pop up normally Fig 3 2 6 Checking the Switch ASSY Upper cover Rib Pawls Switch ASSY Switch ASSY ...

Page 54: ...er cover 2 Place the rubber key pad so that it is fitted over the two bosses and two pins provided on the upper cover PT 1900 1910 PT 1850 Fig 3 2 7 Installing the Rubber Key Pad Pin Pin Boss Boss Upper cover Emblem Rubber key pad Boss Boss Pin Pin Rubber key pad Upper cover ...

Page 55: ...III 27 6 Installing the Main PCB Unit 1 Put the navi dial onto the DC motor PCB PT 1850 only Fig 3 2 8 Installing the Main PCB Unit 1 Navi dial DC motor PCB Main PCB ...

Page 56: ...e upper cover catch the main PCB unit 4 Secure the DC motor PCB onto the upper cover with three screws Note After reassembling the main PCB unit ensure that the navi dial is rotated smoothly PT 1850 only PT 1900 1910 PT 1850 Fig 3 2 9 Installing the Main PCB Unit 2 Screw DC motor PCB Main PCB Latch Upper cover Main PCB unit Screws A B A Latch LCD Screw DC motor PCB Main PCB Latch Latch Upper cover...

Page 57: ...e switch ASSY harness into the A of the upper cover 6 Connect the following harnesses to the main PCB unit Full cutter sensor harness PT 1900 only Cutter motor harness PT 1900 only Cutter sensor harness PT 1850 only 7 Connect the head cable to the main PCB unit Note Be sure to route the cutter sensor harness between the cutter motor and the main frame as illustrated below This will prevent the har...

Page 58: ...Cutter motor harness Switch ASSY harness Full cutter sensor harness Head cable DC motor harness Main frame ASSY Screws Upper cover A Black Red DC motor harness Main frame ASSY Full cutter sensor harness Cutter motor harness Full cutter sensor PRO ASSY Cutter motor ASSY Main PCB unit Switch ASSY harness Head cable DC motor harness ...

Page 59: ...Main PCB unit Main frame ASSY Cutter sensor Switch ASSY harness Black Red DC motor harness DC motor harness A Cutter sensor harness Head cable Upper cover Cutter lever Cutter lever Main frame ASSY Screws DC motor harness Head cable Cutter sensor harness Power supply harness Main PCB unit Switch ASSY harness ...

Page 60: ...when soldering switch ASSY harness CAUTION When soldering use the lead free solder PT 1900 1910 PT 1850 Fig 3 2 12 Installing the Main Frame ASSY 2 Orange Blue Yellow Red Green K1 K2 K3 K4 K5 Main frame ASSY Upper cover Main PCB unit Switch ASSY harness Black K0 Main frame ASSY Orange Blue Yellow Red Green K1 K2 K3 K4 K5 K0 Black Switch ASSY harness Main PCB unit Upper cover ...

Page 61: ... the cutter moving gear 5 Secure the cutter ASSY with screw a so that the long hole provided in the moving blade becomes fitted over the boss of the cutter moving gear Tightening torque 588 98 mN m 6 1 kgf cm WARNING Be careful with the cutter blades 6 Make sure that the cutter ASSY is fitted on the side of the chassis ASSY 2300 without any gap 7 Apply half of a rice sized pinch of grease Silicon ...

Page 62: ...utter ASSY is fittes on the side of the chassis ASSY 1850 without any gap 4 Catch the three hooks on the cutter sensor arm onto the cutter ASSY to assemble the cutter sensor arm 5 Secure the cutter sensor folder ASSY onto the chassis ASSY 1850 with screw a Tightening torque 147 49 mN m 1 5 0 5 kgf cm PT 1850 Fig 3 2 14 Installing the Cutter ASSY PT 1850 Chassis ASSY 1850 Hooks Screw a Spring Screw...

Page 63: ...or ASSY 1 Install the DC motor ASSY to the chassis ASSY with two screws taking care not to damage the gear Tightening torque 147 49 mN m 1 5 0 5 kgf cm Fig 3 2 15 Installing the DC Motor ASSY Chassis ASSY DC motor ASSY Screw Screw ...

Page 64: ...assembly of the roller release lever and roller holder release rod onto the roller holder ASSY as shown below Then install them to the main frame ASSY and set the retaining ring PT 1900 1910 PT 1850 Fig 3 2 16 Installing the Head ASSY and Roller Holder ASSY Roller holder release spring Retaining ring Apply grease G501 here Roller holder ASSY Screw Head ASSY Main frame ASSY Roller holder release ro...

Page 65: ... upper cover then push down the bottom cover until it snaps into place Note Take care not to pinch the cords between those covers PT 1900 1910 PT 1850 Fig 3 2 17 Installing the Bottom Cover 1 Grounding wire Screw Bottom cover Power supply harness Main PCB unit Upper cover Main PCB unit Power supply harness Grounding wire Upper cover Screw Bottom cover ...

Page 66: ...I 38 4 Secure the bottom cover with four screws Tightening torque 392 98 mN m 4 1 kgf cm PT 1900 1910 PT 1850 Fig 3 2 18 Installing the Bottom Cover 2 Screws Bottom cover Screws Screws Bottom cover Screws ...

Page 67: ...hown below and slide down its hinges until they become fitted into the bottoms of the grooves provided in the bottom cover 4 Close the cassette cover PT 1900 1910 PT 1850 Fig 3 2 19 Installing the Cassette Cover Hinge Hinge Upper cover Roller release lever Hinge A Cassette cover Hinge Upper cover Hinge Cassette cover Roller release lever Hinge A ...

Page 68: ... right side of the main body 3 Load a tape cassette 4 Close the cassette cover The roller holder ASSY will be pressed against the head PT 1900 1910 PT 1850 Fig 3 2 20 Installing the Tape Cassette and Tape Separator Stick Roller release lever Hook Cassette cover Tape separator stick Tape cassette Tape cassette Roller release lever Tape separator stick Cassette cover Hook ...

Page 69: ...Installing the Battery Lid 1 Load batteries 2 Fit the front end of the battery lid into the bottom cover and push down the lid Fig 3 2 21 Loading Batteries and Installing the Battery Lid Bottom cover Batteries Battery Lid Bottom cover ...

Page 70: ...f the room temperature is out of the specified range 10 C to 40 C the TEMP NG message is displayed and the check is finished If the same kind of two or more solder points is ON or the solder point is not correct the message as shown in Fig 1 is displayed and the check is finished Fig 1 2 Inspection Mode The mode is used after the machine is repaired or assembled The mode includes the following nin...

Page 71: ...ng for no soldering Rank LCD Display Solder Points A B C B 0 B A A C C 2 1 3 Power Supply Voltage Check Display Inspection Voltage 9 0 0 1V The mark is displayed if the voltage is in the specified range of the input voltage If it is out of the specified range the mark is displayed Fig 3 Display Example of the Information Mode 2 1 4 LCD Check Display The LCD check 1 as shown in Fig 4 is displayed w...

Page 72: ...essing the or 2 key in the display of Fig 6 Fig 7 Shift to the Key inspection mode by pressing the key Fig 8 display Fig 8 The status of the five sensor switches is displayed ON 1 OFF 0 Shift to the Key inspection mode by pressing the key Fig 9 display 2 3 Key Inspection Mode 2 3 1 The display as shown in Fig 9 is indicated by pressing the or 3 key in the display of Fig 8 Fig 9 Shift to the Key in...

Page 73: ...s after implementing the operation described in 2 3 2 the Fig 12 display is indicated and the mark is printed Fig 12 2 3 2 Jog Dial Inspection Mode To enter the jog dial inspection mode do not print the mark when OK is displayed after all keys are checked or press the Jog key When rotating the jog dial the arrow is shifted following the direction of the rotation Fig 13 First move the cursor to the...

Page 74: ...ape automatically or manually CUT 1 is displayed at that time Fig 15 After cutting the tape the display as shown in Fig 16 is indicated and the tape is fed After the tape is fed cut the tape automatically or manually Fig 16 After cutting the tape the display as shown in Fig 17 is indicated and the tape is fed After the tape is fed cut the tape automatically or manually Fig 17 After cutting the tap...

Page 75: ...urned OFF Fig 19 Print Sample Check the printed fonts and tape length of the print sample after the tape is cut If the cut tape is out of the specified range insert the tip of a flat screwdriver through the hole and rotate the trimmer VR1 on the DC motor PCB to adjust the tape feeding length Rotating the VR1 clockwise will shorten the tape feeding length rotating it counterclockwise will lengthen ...

Page 76: ...more than one trouble source is found plan the most reasonable repairing procedure after reviewing the relationship between them 2 When supplying power to this machine having problems from either a set of batteries or the AC adapter make sure that its output voltage level is 11 to 13V under no load 3 When supplying power from a stabilized power unit use the power unit with approx 3A capacity and c...

Page 77: ...IV 2 4 1 3 Troubleshooting Flows 1 Tape feeding failure ...

Page 78: ...IV 3 ...

Page 79: ...IV 4 2 Printing failure ...

Page 80: ...IV 5 ...

Page 81: ...IV 6 3 Powering failure Nothing appears on the LCD ...

Page 82: ...IV 7 ...

Page 83: ...IV 8 4 No key entry possible ...

Page 84: ...IV 9 5 Tape cutting failure ...

Page 85: ...IV 10 6 Abnormal LCD indication ...

Page 86: ...IV 11 7 Tape cassette type not identified ...

Page 87: ... SOLDER X When the power is ON The wrong adapter which supplies higher voltage is used Supplement When the message is disappeared the system is turned OFF after approx two seconds WRONG ADAPTER CHANGER ADAPTATEUR FALSCHER ADAPTER CHANGE ADAPTOR CHANGER ADAPTATEUR While printing The batteries are weak The message is displayed after printing Supplement After the message is disappeared the machine re...

Page 88: ... system is turned OFF while printing Supplement After the message is disappeared the opening message is displayed Text input mode When pressing the normal Character key The text buffer memory is full BUFFER FULL MEMOIRE PLEINE SPEICHER VOLL BUFFER FULL MÉMOIRE PLEINE Text input mode When pressing the dead Character key The text buffer memory is full Text input mode When pressing the Space key The ...

Page 89: ... mode When pressing the Set key The text buffer memory is full Supplement After the message is disappeared the machine returns to the text input mode Accent input mode When pressing the Code Set keys The text buffer memory is full Supplement After the message is disappeared the machine returns to the text input mode Function select mode When pressing the Set key A Symbol or Accent is selected when...

Page 90: ...d the machine returns to the text input mode Text input mode When pressing the Return key More than 4 lines are entered 4 LINE LIMIT TROP DE LIGNES Text input mode When pressing the Print key There is no data in the text buffer memory BUFFER EMPTY MEMOIRE VIDE SPEICHER LEER BUFFER EMPTY MÉMOIRE VIDE Text input mode When pressing the Length key There is no data in the text buffer memory Supplement ...

Page 91: ...e is no data in the text buffer memory Supplement After the message is disappeared the machine returns to the text input mode Text input mode When pressing the Print or Feed Cut keys The tape cassette is not installed TAPE EMPTY PAS DE RUBAN BAND LEER NO TAPE PAS DE RUBAN Text input mode When pressing the Length key The tape cassette is not installed Supplement After the message is displayed for 0...

Page 92: ...rns to the text input mode NO TAPE PAS DE RUBAN While feeding the tape The tape is cut automatically when no tape cassette is installed Supplement After the message is disappeared the machine returns to the text input mode Text input mode When pressing the Print key The text length is longer than the label length to be set The input characters are too many or too big TEXT TOO LONG TROP LONG TEXT Z...

Page 93: ...IMIT TROP DE LIGNES Text input mode When pressing the Length key When two or more lines are input the text cannot be printed because the installed tape is not enough wide Supplement After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Print copies select mode When pressing the Print or Set keys When two or more lines are input the text cannot be pri...

Page 94: ...LIMIT LONGUEUR LIMITÉE Text input mode When pressing the Length key The text you try to print is more than 1 meter Supplement After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Print copies select mode When pressing the Print or Set keys The text you try to print is more than 1 meter Supplement After the message is disappeared the machine returns ...

Page 95: ...cted the cursor is placed under the character other than number or under the return mark or tab mark WRONG CHAR CARACTERE INVALIDE FEHL EINGABE INVAL CHRS CARACTÈRE INVALIDE Function select mode When pressing the Set key When the Number setting is selected the cursor is placed under the character other than number or under the return mark or tab mark Supplement After the message is disappeared the...

Page 96: ...elect mode When pressing the Set key The memory full error occurs when registering the file Supplement After the message is disappeared the machine returns to the text input mode MEMORY FULL MEMOIRE PLEINE SPEICHER VOLL MEMORY FULL MÉMOIRE PLEINE Text input mode When pressing the Print or Feed Cut keys The tape cutter is closed CUTTER ERROR ERREUR COUPE MESSER FEHLER CUTTER ERROR ERREUR COUPE Prin...

Page 97: ...ÄT ERSCHÖPET Currency data input mode When pressing the Set key The exchange rate is set to 0 Supplement After the message is disappeared the machine returns to the text input mode DIVIDE BY ZERO ERROR ERREUR ZERO FEHLER KURS 0 Text input mode When pressing the Length key The text cannot be printed because the installed tape is not enough wide Supplement After the message is displayed for 0 5 seco...

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Page 101: ...Apr 2002 8V2034BE0 Printed in Japan ...

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Brother P-Touch PT-1850, Service Manual

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