Brother -- 1910 -
Contents
1. Is the black rubber on the tape feed sub roller deformed or is it slipping against the tape feed roller built in the tape cassette Is the black Replace the roller holder ASSY rubber of the tape feed sub roller fitted between the ribs of the tape Replace the roller holder ASSY feed roller Replace the batteries with new ones Normal tape feeding End of repair Print pitch printed character width is normal Are the motor gear or any other drive gears deformed or loose Replace the DC motor Replace the DC motor ASSY or main frame ASSY Normal tape feeding Replace the main PCB ASSY Y End of repair 2 Printing failure The tape is fed normally but no printing occurs Is the head cable connection correct Are certain dots always missing The thermal print head may be partially clogged Clean it up Is the total width of printed characters normal Any vertical gaps in printed characters dot shifting missing immediately after tape cassette loading Correct it The tape feeding may be abnormal Replace the batteries or use the optional AC adapter If the problem persists go to the troubleshooting flow 1 Lessen the backlash between2. Flat screwdriver Power supply harness Upper cover ge Main PCB unit 2 e Front Main PCB unit 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 1 6 4 Removing the Cassette Cover Main Frame ASSY CAUTION During 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 Cassette cover Roller release lever Upper cover Fig 3 1 7 Removing the Cassette Cover Il 7 2 Remove the switch ASSY harness which is soldered at 6 places from the main PCB unit Note However if only the main frame ASSY is removed the soldered switch ASSY must not be removed PT 1900 1910 Main frame ASSY Switch ASSY harness amp Upper cover Main PCB unit PT 1850 Main frame ASSY f E SS ei Switch ASSY harness Upper cover Main PCB unit Fig 3 1 8 Removing the Main Frame ASSY 1 111 8 4 Disconnect the following harnesses from the main PCB unit Cutter motor harness PT 1900 1910 only Full cutter sensor harness PT 1900 1910 only Cutter sensor harness PT 1850 only 5 Remove the harness the DC motor PCB by melting the solder DC motor harness Disconnect the head cable from the main PCB unit
3. PT 1900 1910 181 asti n HA oa ZT NOS d 3 p ON a O OOOOOOOOO0O0O OOOOOOGOGO DSDODOODODO OOOOOOOGOQO Y NES Y PT 1850 Le 181 Le 514 E et o ON a O OOOOOOOOO00O OOOOOOGOGO DSDODOODODO 66000000 Y OO SS C Y CEET Fig 1 1 1 PT 1900 1850 1 Dimensions W x D x H 181 x 282 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 1 1 2 Keyboard 1 Entry system Rubber key pad 2 Number of alphanumeric and symbol keys 39 3 Number of function keys 12 including On Off key 4 Key arrangement See Fig 1 1 2 5 Navigation dial PT 1850 Rotary switch 24 positions cycle Set key 1 1 13 Display 1 Display type Liquid crystal display LCD 2 Display composition 16 x 59 dots 3 Number of indicators 20 See Fig 1 1 2 4 Dotsize 0 65 mm 25 6 mils wide by 0 65 mm 25 6 mils high 5 Field of view angle adjustment Fixed by a resistor 1 1 4 Printing Mechanism 1 SB Print method Thermal transfer onto plastic 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 Print speed 10 mm secon
4. 10 Installing the Tape Cassette and Tape Separator Stick 11 Loading Batteries and Installing the Battery Lid 12 Demonstration Print and Final Chack sinistre Removing the Tape Cassette and Tape Separator Stick T Removing the Bellom COVO iei indici tanita aaa Removing the Cassette Cover Main Frame ASSY Unit and Rubber Key Pad I Removing the Battery Terminals 2 0 b rte ihe Battery Tamina ne ne cie d 2 A Mella Bindi ENS anne nie nu un 4 NI the Rubber Key age ee aie nn Installing the Main POB LME 7 Installing the Main Frame ASSY oiii installing tho Cassetto O sa Removing ihe Bind Civics ia S Instal ling the Switch ASSY can TEF 2 5 CHAPTER IV TROUBLESHOOTING AND ERROR MESSAGE IV 1 4 1 1 8 3 Powering failure Nothing appears on the LCD IV 6 4 No key entry possible IV 8 da Error Message 158 Mm as WINE 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 CHAPTER SPECIFICATIONS 1 1 MECHANICAL SPECIFICATIONS 1 1 1 External Appearance
5. The text buffer memory is full Text input mode When pressing the dead Character key The text buffer memory is full Text input mode When pressing the Space key The text buffer memory is full Text input mode When pressing the Return key The text buffer memory is full Text input mode When pressing the Tab Set key The text buffer memory is full Text input mode When pressing the Accent key The text buffer memory is full Text input mode When pressing the Symbol key The text buffer memory is full IV 13 Error Conditions Displa AAA U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA Symbol input mode BUFFER ___ MEMOIRE SPEICHER BUFFER MEMOIRE a pressing the Set eie PLEINE VOLLI FULL PLEINE The text buffer memory is full lt Supplement gt After the message is disappeared the machine returns to the text input mode Symbol input mode When pressing the Code Set keys The text buffer memory is full lt Supplement gt After the message is disappeared the machine returns to the text input mode Accent input mode When pressing the Set key The text buffer memory is full lt Supplement gt 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
6. CODE LA7868001 NAME MAIN PCB CIR 1900 8 Appendix 1 B Main PCB CIR 1850 PT 1850 4 2 A CUTTER SENSOR age BAG LEE Bl5 A e ABL 141 de LJ ABL 431 e ml 5 ABl111 4 eatin pas yp Mt H a LCI cf m ABI7I s n ABIB E i FT t T A fiiit De fe afa Fot beie Due D ajaja i R7 M DERE RRE RCLCGLELOS z rova teu mui a PDS D14 3 persa CODE LA7875001 SEA
7. When pressing the EMPTY ___ VIDE LEERI EMPTY VIDE ___ Print key There is no data in the text buffer memory Text input mode When pressing the Length key There is no data in the text buffer memory lt Supplement gt After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Text input mode When pressing the Repeat key There is no data in the text buffer memory Text input mode When pressing the Number key There is no data in the text buffer memory IV 15 Error Conditions Displa AA IIA U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA Function select mode BUFFER MEMOIRE SPEICHER HAHAHAHAHA HUuSSHHAZTEHE Mid pressing the Set Empryy VIDE LEER BESSHESESA ESESHSHAZA ey The Length setting is selected when there is no data in the text buffer memory lt Supplement gt After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Function select mode When pressing the Set key The Repeat or Number setting is selected while there is no data in the text buffer memory lt Supplement gt After the message is disappeared the machine returns to the text input mode Text input mode TAPE PAS DE ___ EIL PAS DE When pressing the RUBAN Print or Feed amp Cut EMPTY ___ RUBAN AE U keys
8. 3 Remove the two screws of the main frame ASSY 23 Lift the main frame ASSY up and out of the upper cover PT 1900 1910 Y Screws End gt wg Main frame ASSY Head cable Fall Full cutter sensor harness Cutter motor harness Upper cover Main PCB unit a n p d Fig 3 1 9 Removing the Main Frame ASSY 2 PT 1900 1910 111 9 9 Remove the cutter lever from the upper cover PT 1850 only PT 1850 Screws I e DC motor harness Main frame ASSY Head cable sa Cutter sensor harness Z Cutter lever a Upper cover Main PCB unit a A Fig 3 1 10 Removing the Main Frame ASSY 2 PT 1850 111 10 PT 1900 1910 Head cable Power supply harness Full cutter sensor harness DC motor harness l Cutter motor harness o 00 olh a LL T Main PCB unit e Switch ASSY harness fp PT 1850 Head cable Power supply harness Cutter sensor harness DC motor harness a Al re EA oo o Main PCB unit Fig 3 1 11 Removing the Main Frame ASSY 3 Il 11
9. After the message is disappeared the machine returns to the text input mode File number select mode MEMORY ___ MEMOIRE ___ SPEICHER MEMORY M MOIRE ae pressing the Set Puru PLEINE VOLL FULL PLEINE The memory full error occurs when registering the file lt Supplement gt After the message is disappeared the machine returns to the text input mode Text input mode CUTTER ___ ERREUR MESSER ____ CUTTER ___ ERREUR ____ When pressing the Print or Feed amp Cut ERROR COUPE FEHLER ____ ERROR ___ COUPE keys The tape cutter is closed Print copies select mode When pressing the Print or Set keys The tape cutter is closed Supplement After the message is disappeared the machine returns to the text input mode Final number setting mode When pressing the Print or Set keys The tape cutter is closed lt Supplement gt After the message is disappeared the machine returns to the text input mode IV 21 Error Conditions To recover from the error turn the power OFF ON The error has priority over the no tape error Text input mode When pressing the Tab Set key More than 50 tab marks are set Currency data input mode Displa ERREUR COUPE MESSER FEHLER TAB MAXI ZU VIELE TAB STOPS KAPAZITAT__ ERSCH PET_ When pressing the Set k
10. SERVICE MANUAL MO DEL PT 1900 1910 1850 EC JANISMS ell ECUR NIL PREFACE This publication is a service manual covering the specifications general mechanisms disassembly reassembly procedure and troubleshooting and error message of the Brother PT 1900 1910 1850 It is intended for service personnel and other concerned persons to accurately and quickly provide after sale service for our PT 1900 1910 1850 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 CHAPTER II CHAPTER III CHAPTER IV APPENDIX 1 Copyright Brother 2002 All rights reserved SPECIFICATIONS GENERAL MECHANISMS DISASSEMBLY amp REASSEMBLY PROCEDURE TROUBLESHOOTING AND ERROR MESSAGE CIRCUIT DIAGRAMS 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 CONTENTS CHAPTER SPECIFIC A TONG wc issciscscarstareresosarssasosaresanstaceiaretaresarsiareiaresareuaraiat l 1 13 MECHANICAL SPECIFICATIONS coo l 1 AAE a Dco rue ee l 1 Tie MR E 1 2 TA ai 1 2 JS PERO Mes ii 1 2 LA MAPA o pa 1 3 A repo 1 3 12 ELECTRONICS SPECIFICATIONS sccssscsicsesssassoassbacesnnscedsoobibapsbabodsdabobsbsdulbn
11. The tape cassette is not installed Text input mode When pressing the Length key The tape cassette is not installed lt Supplement gt 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 tape cassette is not installed Final number setting mode When pressing the Print or Set keys The tape cassette is not installed IV 16 Error Conditions ee SEY U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA Function select mode TAPE PAS DE BEHSSSHSETA PHAR EH ae pressing the Set EMPTY RUBANI BESHEEEESS dUSTEEEESE The Length setting is selected when no tape cassette is installed lt Supplement gt After the message is displayed for 0 5 seconds the machine enters the fixed longth print setting mode While printing HHHHHHHHHH HHHHHHHHHH HRA PAS DE eee BEEHESERER LLL ESESITESE RUBAN automatically when no tape cassette is installed lt Supplement gt After the message is disappeared the machine returns to the text input mode While feeding the tape The tape is cut automatically when no tape cassette is installed lt Supplement gt After the message is disappeared the machine returns to the text input mode Text input mode TEXT_TOO__ ice TEXT When pressing the Print key LONG
12. Bottom cover Fig 3 2 1 Installing the Battery Terminals 111 21 2 Installing the Power Supply PCB 1 Fitthe positive and negative terminals of the battery power cords into the bottom cover Note 1 When handling those terminals do not grip the cords but 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 mNem 3 1 kgf cm Grounding wire Negative terminal Power supply PCB Rib Rib E LATS E Bottom cover Fig 3 2 2 Installing the Power Supply PCB 1 11 22 Fig 3 2 3 Installing the Power Supply PCB 2 111 23 3 Installing the Blind Cover Fit two holes A 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 Blind cover Holes A Bottom cover Fig 3 2 4 Installing the Blind Cover 111 24 4 installing the Switch ASSY 1 Put the switch ASSY into the upper cover so that the switch ASSY is hooked onto the three pawls of the upper cover completely 2 Hook the switch ASSY harness into the two ribs on the upper cover Switch ASSY Upper cover Fig 3 2 5 Installing the Switch ASSY 2 Press and release each of those switch ASSY with
13. Once deformed excessively the washer becomes unusable and a new one should have to be put back in Remove two screws b and take off the cutter motor ASSY taking care not to damage the motor gear Remove screw c and take off the full cutter sensor PRO ASSY Turn the actuator counterclockwise and remove it from the chassis ASSY 2300 PT 1900 1910 Cutter ASSY Cutter motor ASSY Cutter double gears Actuator Fig 3 1 14 Removing the Cutter ASSY PT 1900 1910 111 14 Removing the cutter ASSY and cutter sensor folder ASSY WARNING Take care not to touch the cutter of the cutter ASSY 1 Remove screw a and take off the cutter sensor folder ASSY 2 Release the three hooks to remove the cutter sensor arm 3 Remove the spring 4 Remove screw b and remove 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 Chassis ASSY 1850 Cutter ASSY Hooks Screw b Screw a Cutter sensor folder ASSY Cutter sensor arm Stationary cutter Movable cutter Fig 3 1 15 Removing the Cutter ASSY PT 1850 I 15 Removing the Main PCB Unit and Rubber Key Pad When you handle the PCB it is recommended th
14. Red K3 SH Yellow K2 SIT Blue K1 AT Orange Switch ASSY harness 2 A Main PCB unit Upper cover PT 1850 Main frame ASSY KO C94 Black 5 ST Green 4 94 Red K3 C94 Yellow K2 ST Blue K1 ST Orange de RS fos SE Switch ASSY harness Upper cover Main PCB unit Fig 3 2 12 Installing the Main Frame ASSY 2 111 32 E Assembling the Components of the Main Frame ASSY Installing the full cutter sensor PRO ASSY cutter motor ASSY and cutter ASSY PT 1900 1910 Fit the actuator into the hole provided in the chassis ASSY 2300 and turn it clockwise Secure the full cutter sensor PRO ASSY to the chassis ASSY 2300 with screw c Tightening torque 147449 mNem 1 5 0 5 kgf cm Secure the cutter motor ASSY with two screws b with its harness facing down Tightening torque 147449 mNem 1 5 0 5 kgf cm Set the cutter double gears and cutter moving gear into place then fit the washer in the cutter moving gear 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 mNem 6 1 kgf cm WARNING Be careful with the cutter blades Make sure that the cutter ASSY is fitted on the side of the chassis ASSY 2300 without any gap Apply half of a rice sized pinch of grease Silicon grease G501 to the boss of the cutter moving gear or the inside edge of the long ho
15. lt Supplement gt After the message is disappeared the machine returns to the text input mode Function select mode HHHHHHHEEH HHHHHHHHHH Deer etc SR HHHHHHHHHH HAHHHHAHHEE ey A Symbol or Accent is selected when the text buffer memory is full lt Supplement gt After the message is disappeared the machine returns to the text input mode Currency data input mode When pressing the Set key When the text buffer memory is full lt Supplement gt After the message is disappeared the machine returns to the text input mode IV 14 Error Conditions Displa AA IA U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA When pressing the LIMIT LIGNES ZEILEN HMAMARARAR HERR EHH Return key f l More than 5 lines are entered Dead mode When pressing the Return key More than 5 lines are entered lt Supplement gt After the message is disappeared the machine returns to the text input mode Currency data input mode When pressing the Set key More than 5 lines are entered lt Supplement gt After the message is disappeared the machine returns to the text input mode Text input mode edHHHHHHH HEHEHHE HHE annrnanaaa 4 LINE TROP_ DE When pressing the eeHHHHHHH anna 4 LIMITI LIGNES Return key E More than 4 lines are entered Text input mode BUFFER __ MEMOIRE __ SPEICHER __ BUFFER __ M MOIRE
16. main PCB motor PCB and power supply PCB a tape feed motor a cutter motor PT 1900 1910 and a thermal print head assembly Main PCB This manages all the PT 1900 1910 1850 components including an LCD key pad two DC motors PT 1850 One DC motor and thermal print head Note When mounting the chips onto the PCB use the lead free solder Power Supply PCB This 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 Cassette Sensor This supports the sensors that detect the tape width and ink ribbon type in the tape cassette DC Motors This machine has two DC motors PT 1850 One DC motor One feeds tape and ink ribbon and the other drives the cutter to cut PT 1900 1910 the tape Thermal Print Head This is a thick film thermal print head which integrates a heat generator consisting of 128 heating elements vertically aligned and driver circuitry Cutter motor DC motor PT 1900 1910 Cassette sensor DC motor Navi dial PT 1850 Key contacts Motor PCB Thermal head O CH Orange Blue Positive E battery terminal Negative battery terminal ES Ele AC adapter POWER SUPPLY PCB Fig 2 2 1 Control Electron
17. Batteries and Installing the Battery Lid 1 Load batteries 2 Fitthe front end of the battery lid into the bottom cover and push down the lid SN o Batteries O P SUS A Battery Lid Fig 3 2 21 Loading Batteries and Installing the Battery Lid 1 41 12 Demonstration Print and Final Check 1 2 1 Starting the Inspection Mode First press the ON OFF key while pressing the Code and R keys and release the ON OFF key then Code and R keys so that the RAM is cleared and the machine performs normally Then when the power is OFF press the ON OFF key while pressing the Code and K keys and release the ON OFF key then the Code and K keys so that the machine goes into the inspection mode When the machine goes into the inspection mode the display as shown in Fig 2 appears If the following errors occur take an appropriate action to recover from them Checking the ROM Temperature and Solder Check the ROM temperature and solder points If the ROM is not connected correctly the ROM PROBLEM message is displayed and the check is finished If 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 chec
18. E Disassembling the Main Frame ASSY Removing the roller holder release rod roller release lever roller holder ASSY and head ASSY 1 Remove the retaining ring from the roller holder ASSY 2 Liftup the roller release lever as shown below and pull up the roller holder ASSY together with the roller release lever and roller 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 Retaining ring Roller holder release spring Screw Roller holder ASSY Roller release lever No A eel N Head ASSY EAN Roller holder release rod Main frame ASSY PT 1850 Retaining ring Roller holder release spring Screw S Roller holder g MO _ Roller release lever i Head ASSY gt Roller holder release rod Main frame ASSY Fig 3 1 12 Disassembling the Roller Holder ASSY and Head ASSY 111 12 Removing the DC motor ASSY 1 Remove two screws from the main frame ASSY then take off the DC motor ASSY O DC motor ASSY Main frame ASSY Fig 3 1 13 Removing the DC Motor ASSY 111 13 Removing the cutter ASSY cutter motor ASSY and full cutter sensor PRO ASSY WARNING Be careful with the cutter blades 1 2 SE Remove screw a and take off the cutter ASSY Remove the washer by using a pin and take off the cutter moving gear and cutter double gears Note
19. R 4 row R gt L 5 row L gt R in this order The key to be pressed is displayed on the LCD Fig 10 display and the key to be pressed next is displayed if pressing the key correctly If not the key to be pressed next and X mark are displayed Fig 11 display KEY Fig 10 KEY Fig 11 When completing to check all keys the display as shown in Fig 12 is indicated and the O mark is printed For U S A CANADA AUSTRALIA model only For the European models after implementing the operation described in 2 3 2 the Fig 12 display is indicated and the O mark is printed KEY OK Fig 12 2 3 2 Jog Dial Inspection Mode To enter the jog dial inspection mode do not print the O mark when OK is displayed after all keys are checked or press the Jog key When rotating the jog dial the arrow lt gt is shifted following the direction of the rotation Fig 13 First move the cursor to the left hand side by three points and press the Set key If the left mode performs correctly it is shifted to the right mode Check the right mode as well If the right mode also performs correctly OK is displayed and printed Then cut the tape and shift to 2 4 Cut Mode Fig 14 display JOG zi lt JOG E JOG yan X Fig 13 111 45 2 4 Cut Mode The display as shown in Fig 14 is indicated by pressing the ran key
20. all of the batteries and the AC adapter from this machine 4 1 2 After Repairing After repairing the defective section be sure to check again CHAPTER III 12 Demonstration Print and Final Check to see if the repaired section works correctly Also make a note of the troubleshooting procedure so that it will be handy should problems occur in the future 4 1 3 Troubleshooting Flows 1 Tape feeding failure The tape will not feed through Put in a new tape cassette then try printing again End of repair The old tape cassette may be defective Normal tape feeding Is there any oil on the tape feed sub roller Clean up the roller Is the pressure of the tape feed sub roller 10 78 522 N 1100 322 at the roller center Replace the roller 9 holder ASSY Is the motor harness soldered Any rotation of the DC motor Solder the motor harness Without tape cassette loaded and with the roller release lever engaged normal motor Any open circuit in the motor harness Replace the DC motor ASSY with a new one rotation Is the tape feed platen roller gear or sub roller s gear N deformed With tape cassette loaded and with y the roller release lever engaged normal motor rotation Replace the roller holder ASSY
21. described in Subsection 2 1 2 As the DC motor rotates the rotation is transmitted via 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 than that of the tape feed sub roller Adhesive base tape un Transparent laminate tape Tape feed roller Tape feed sub roller gear Head ASSY Platen idle gear Roller holder ASSY Platen roller DC motor Tape idle gear Platen idle gear Main frame ASSY Fig 2 1 3 Tape Feeding Mechanism Il 4 2 Adhesive Base Tape Feeding only for laminated tape cassettes A laminated tape cassette contains both a transparent laminate tape roll and a separate adhesive base tape roll When a transparent laminate tape and an adhesive base tape pass through the contact point between the tape feed roller and tape feed sub roller they are then bonded together into a single printed tape The ink printed on the laminate tape is therefore sealed up with the adhesive base tape 3 Ink Ribbon Feeding except for non laminated thermal film tape cassettes an
22. ho TOO LONG The text length is longer than the label length to be set The input characters are too many or too big Print copies select mode When pressing the Print or Set keys The text length is longer than the label length to be set The input characters are too many or too big Supplement After the message is disappeared the machine returns to the text input mode IV 17 Error Conditions Displa AAA A U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA Final number setting TEXT TOO TROP TEXT ZU TEXT TROP mode When pressing the LONG LONG LANG TOO LONG LONG Print or Set keys The text length is longer than the label length to be set The input characters are too many or too big lt Supplement gt After the message is disappeared the machine returns to the text input mode Text input mode LINE 77 TROP_ DE __ ZUVIELE 7 LINE TROP DE when pressing the LIMIT LIGNES ZEILEN LIMIT LIGNES Print key When two or more lines are input the text cannot be printed because the installed tape is not enough wide 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 lt Supplement gt After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Print copies select mode When pr
23. 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 lt Supplement gt After the message is disappeared the machine returns to the text input mode Final number setting mode When pressing the Print or Set keys The text you try to print is more than 1 meter lt Supplement gt After the message is disappeared the machine returns to the text input mode Fixed length print setting mode When pressing the Set key The setting you try to set is out of the possible range Out of the specified range IV 19 Error Conditions AA a SEY U K BELGIUM FRENCH GERMAN U S A d AUSTRALIA Tab setting mode LENGTH LONGUEUR LENGTH Ed be pressing the Set eager LIMITE LANG LIMITI LIMIT E __ The setting you try to set is out of the possible range Out of the specified range Function select mode X BSRAHESESS HAHAAHAAEE Ho nn Set BESSSSSSSS Hstsx gudddd The Length setting is Selected when the label length is more than 1m in printing Supplement After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Text input mode WRONG CARACTERE __ FEHL CARACT RE When pressing the Number key CHAR INVALIDE EINGABE ERE INVALIDE _
24. on the inside of the cassette cover As described in Subsection 2 1 2 Roller Holder ASSY Setting amp 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 Tape cassette Head ASSY Platen roller Tape feed sub roller 8 c Main frame ASSY Roller release lever Roller holder release rod Shaft Roller holder ASSY Roller release lever Roller holder release spring Roller holder release rod Roller Holder ASSY retracted Roller Holder ASSY engaged Fig 2 1 7 Roller Release Lever and Roller Holder Release Rod Il 8 PT 1900 1910 Hooked section Cassette cover Cassette cover PT 1850 Hooked section Cassette cover N LA Cassette cover Fig 2 1 8 Roller Holder ASSY amp Cassette Cover Interlocking Mechanism Opening the cassette cover 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 Il 9 2 2 2 2 1 2 2 2 2 2 3 2 2 4 2 2 5 2 2 6 OUTLINE OF CONTROL ELECTRONICS Configuration of the Electronic Part Fig 2 2 1 shows a block diagram of the control electronics of the PT 1900 1910 1850 The control electronics consists of three printed circuit boards
25. recognize the customization lt Country Display gt The country display displays the country specifications as designated by the solder points 1 to 5 Country LCD Display Solder Points Specification AAA eee es ee ee ae a NE So d MUECA XC Xp XE OE a emm exo Px x x omms eo x x mem ex x x oT x lt Head Rank Display gt 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 soldering CAUTION When soldering use the lead free solder 11 12 2 4 POWER SUPPLY PCB C1 for the logic circuitry 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 11 13 CHAPTER Ill DISASSEMBLY amp REASSEMBLY 3 1 DISASSEMBLY 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 Section A Bottom cover Battery lid Batteries e Bottom cover g O Fig 3 1 1 Removing the Battery Lid and Batteries 111 4 2 Removing the Tape Cassette and Tape Separator 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 Ta
26. the bottom cover by pulling the three pawls outwards Pawl bv E IS Td Blind cover 1 o Bottom cover Fig 3 1 20 Removing the Blind Cover 111 18 8 Removing the Power Supply PCB 1 Remove the positive and negative terminals of the battery power 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 Grounding wire Negative terminal Power supply PCB Power supply harness Positive terminal Bottom cover Fig 3 1 21 Removing the Power Supply PCB 111 19 9 Removing the Battery Terminals 1 Remove the battery terminal A as shown below left 2 As shown below right remove the battery terminal B while pressing section A with the tip of a flat screwdriver a AP Section A Battery terminal A Battery terminal B Flat screwdriver Section A a Battery terminal B Bottom cover Fig 3 1 22 Removing the Battery Terminals Il 20 3 2 REASSEMBLY PROCEDURE 1 installing the Battery Terminals 1 Place the bottom cover upside down and fit battery terminal A into the bottom cover as shown below left Make sure that pawled sections A catches the bottom cover 2 Fita battery terminal B into the bottom cover as shown below right Battery terminal A Section A ode Battery terminal B sS
27. HHHHHHHHHE HHHHHHHHHE Appendix 1 4 Main PCB CIR 1900 PT 1900 1910 1 2 3 4 5 6 7 8 ob PN TT ar AE TMS Eq B COVER OPEN SENSOR H IS s ETE dti nag an B inigiginigigigigigigigiqig gig igigigigig u igi i DE Hiii oi E 3 age OF ve EM EI PP i gi HP x an 8 F E af aie EI salad i al a E seus n EN mand EE FE a PaS a4 4I o i m inm EI Fr 4 i pave Fr ENS rend E BI go mea Le MEN Jet 1 i al MET sele Y 4 sde E aie E mad E Fm C t mad sels sala AWS A a CI NEC bso Poara El a do td gt Y fixe LE d BE i gt stu um E xb din k M qee TC7SHABK i AB LH TTD 2 2g Ly ea
28. N PCB CIR 1850 1 2 3 4 5 6 T 8 Appendix 1 C Sub PCB u ORANGE 16V C4700 pe el TE memga Lun 4 o BLUE L 1 BLACK CODE LA7867001 NAME POWER SUPPLY CIR 1900 1850 Apr 2002 8V2034BE0 Printed in Japan
29. S ER E pn E X rb x i y Tu SEH a a ar e E 3 zr xe E 2 ae a at mer t S E E atat eee 5 tel 19 a 7 E re La de ji 3 amp a EJ Py pi in E s ME us a ra 1 s sa ME ABL D INN 11 34 AB 47 14 148 1 2 Ms H3 m oe T LT 13 al kw Ton Tame Tons Tas sue T 1m PR M 4 dm ii MES SAN gels ami P d Ei AES MI REM MA D c 50 RD EB RE rn mis Bei Pa 5 E m nd Me dius Er 15 Lal Tas g por ae ana mu nn i20 Mar rj ou hia conse ae LH GA LR ER ER E i ITA ES E ER sel ep se se T NEB aama WAL tel Lee de e oc 0 o o 9 9 o HN sp CD E E Is m fea Ha Tas Tom a Ke 24 cela 4 Be E wa T SD E gh EAN SN DE ERE FE of m i Es pea 1 a ar Para pas RA Lad Sw waa nag Lad Lad a4 ES 4 TT me st tn o5 costs hihi E E oot e alala a alala aalala alala ala pa w E 8 meet bee peo Lee De e ce 4 o4 CE HEC se mei uz E d E WB pels MN b Lo s 4 9 e el Le e 4 o o ep Le oe CHEANA E ar 34 a 144 am E eng m E23 te az E rad Sexe 54 o o 4 Lo ot Lo e 4 o o pelag BO 5 EN 3 4 A oats 1 Eu a 2 45 aT We a ahs A B e ae re 12 re SaaS A A den Be l wi F tese l S T E el rv obrem E E Bo I rtr ry a t wart of E a i na x i ts se ai ENS Eu a aly SE d Av 8 uf y 1 s e ily E 1 I E El ae gt huit E aly a t be _ 4 Pi T Ts s f a l de e Ts 3 Aw 95 3 zu alufa I E s i d l l l l l l NAME MAI
30. Store Recall M Del ine Clear SSE Ge G0 Ga Go O Tab Set Tab Length Ga ape S000 60 C9 00 CO G2 CO G9 C2 OOS CSS Boe SOQOQOSODO E SBS PT 1850 UK Fig 1 1 2 Key Arrangement 5 AAA Length pro ABC brother Font Font2 A A A A lt Memor Function Font Size Wide Style ABC ABC Store Recall M Del ine Clear SSE HEEE O Tab Set Tab Length Gs D SOCOO O CODODO E OOO DOO OO ee Symbol Accent eeSetup Con SOS OOOO CD Geo DIES C PT 1850 BELGIUM Fig 1 1 2 Key Arrangement 6 1 2 ELECTRONICS SPECIFICATIONS 1 2 1 Character Generator 1 Internal characters U S A CAN PT 1900 1910 179 characters U K FRA BEL PT 1850 198 characters GER PT 1850 211 characters 2 Internal font HELSINKI BRUSSELS 3 Internal memory Text buffer 99 characters PT 1900 1910 1850 File memory 300 characters PT 1900 1910 1850 1 22 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 key command takes effect only when no data is entered 1 10 CHAPTER Il GENERAL MECHANISMS 2 1 MAIN MECHANISM 2 1 1 Print Mechanism 1 Structure of Thermal Head This machi
31. __ When the Number setting is selected the cursor is placed under the character other than number or under the return mark or tab mark carla HHHHHHHHHA HER HAR RAH aes Set HHHHHHHAHH HAHAH HAHAH When the Number setting is selected the cursor is placed under the character other than number or under the return mark or tab mark lt Supplement gt After the message is disappeared the machine returns to the text input mode Text input mode NICHT When pressing the Number key HERE M GLICH E gt The cursor is placed on the end of the text Funetionselgetmode s HHHHHHAHHA ESEHSASREEAM urs uer Set ERSESTETAEE HHHAR HRA When the Number setting is selected the cursor is placed on the end of the text lt Supplement gt After the message is disappeared the machine returns to the text input mode IV 20 Error Conditions Po Display U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA Text input mode PAS DE KEINE PAS DE When pressing ie FILES FICHIER PHRASE FILES FICHIER Recall key No file is registered in the text memory Text input mode When pressing the M DEL key No file is registered in the text memory Memory select mode HHHHEHTHHHEHH HHHHHHHHHH MD tt HHHHHHHHHH HAHHHHHAHE ey When the Recall or Clear setting is selected no file is registered in the text memory lt Supplement gt
32. at an anti static mat be used If you have built up a static charge touching the PCB without any anti static control may damage the LSI and other electronic devices 1 Remove three screws to remove 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 Screw DC motor PCB Main PCB Main PCB unit PT 1850 DC motor PCB Main PCB Main PCB unit Fig 3 1 16 Removing the Main PCB Unit and DC Motor PCB 1 I 16 4 Remove the navi dial from the DC motor PCB PT 1850 Navi dial DC motor PCB Main PCB y fa e Fig 3 1 17 Removing the Main PCB Unit and DC Motor PCB 2 b Liftup the rubber key pad 6 Remove the emblem from the upper cover PT 1900 1910 PT 1900 1910 SS a Das Y if Upper cover PT 1850 A y gt SEO SS E Ed Ss e RTE LA Se Upper cover Fig 3 1 18 Removing the Rubber Key Pad 11 17 6 Removing the Switch ASSY 1 Remove the switch ASSY harness from A position of the upper cover 2 Remove the switch ASSY from the upper cover by pulling the three pawls outwards Switch ASSY Upper cover Pawls Fig 3 1 19 Removing the Switch ASSY 7 Removing the Blind Cover Remove the blind cover from
33. d Typical 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 Character size WEGRUCW Gs The height and width of the printed character are different depending on characters The values in the above list refer to the values of H of HELSINKI The character size indicates the point size 1 2 1 1 5 Tape Cassette 1 Cassette Cartridge type 2 Types of tape cassettes Laminated tape cassette Laminate tape ink ribbon and adhesive base tape Non laminated tape cassette Non laminate tape and ink ribbon Instant lettering tape cassette Instant lettering tape and ink ribbon Non laminated thermal film Non laminated thermal film tape tape cassette lron on transfer tape cassette lron on transfer tape and ink ribbon Stamp tape cassette Porous stamp tape and base paper Cloth tape cassette Cloth tape and ink ribbon 3 Tape size wem por o S S Laminate tape 6 9 12 18 mm 8m 5 m for the fluorescent coating tape Non laminate tape 6 9 12 18 mm m 8 6 Porous stamp tape 18 mm 3 4 4 Tape cassette packed with the machine Laminated tape cassette containing a 12 mm wide black ink ribbon laminate tape and adhesive base tape 1 1 6 Tape Cutter 1 Tape cutting Automatic cutter scissors type PT 1900 PT1910 Manual cutter scissors
34. d stamp tape cassettes As the DC 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 feed gear The difference between the tape feed speeds at the platen and at the ribbon drive cam is absorbed by the clutch spring which is integrated in the ribbon drive cam and allows the cam to slip This way the ink ribbon is kept tense which enables the ribbon to clearly separate from the tape at the stabilized angle after printing Ribbon take up roll Tape feed roller A Tape feed sub roller Ink ribbon Head ASSY Platen roller Roller holder ASSY Ribbon drive cam DC motor Main frame ASSY Fig 2 1 4 Ribbon Feeding Mechanism Il 5 2 1 4 Automatic Tape Cutter Mechanism PT 1900 1910 The cutter ASSY consists of a stationary blade and a movable blade driven by the cutter motor Upon completion of printing and tape feeding the CPU activates the cutter motor whose clockwise rotation is transmitted via the idle gears to the cutter moving gear As the cutter moving gear rotates counterclockwise its boss X which is fitted in the openin
35. e X mark is displayed Country Head Voltage Specification Rank Check Na H Vo US 0 e 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 when pressing the or 0 key HHHHHHHHHH All guidance off HHHHHHHHHH Fig 4 The LCD check 2 as shown in Fig 5 is displayed when pressing the S key XXXXXXXXXX All guidance on XXXXXXXXXX Fig 5 111 43 2 2 2 3 The LCD check 2 as shown in Fig 6 is displayed by pressing the TN key All guidance is ON Fig 6 Shift to 2 2 Cassette Sensor Inspection Mode by pressing the aei key Fig 7 display Cassette Sensor Inspection Mode The display as shown in Fig 7 is indicated by pressing the l or key in the display of Fig 6 CASSETTE Fig 7 Shift to the Key inspection mode by pressing the EL key Fig 8 display CASSETTE 00000 Fig 8 The status of the five sensor switches is displayed ON 1 OFF 0 Shift to the Key inspection mode by pressing the iis key Fig 9 display Key Inspection Mode 2 3 1 The display as shown in Fig 9 is indicated by pressing the al or 3 key in the display of Fig 8 KEY Fig 9 Shift to the Key inspection mode by pressing the a key Fig 10 display 111 44 Press the Print key 1 row L gt R 2 row R gt L 3 row L gt
36. e 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 to produce a dot on the tape The tape is advanced and the next heating cycle is repeated thus forming a character on the tape Il 1 For stamp tape cassettes If the selected heating element s generates heat the porous stamp tape will be melted so that a pore pores will be formed in the tape The tape is advanced and the next heating cycle is repeated thus forming a character of pores on 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 For laminated tape cassettes instant lettering tape cassettes and iron on 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 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 the signal as one dot 0 141 mm when the photo interrupter detects the encode gear assembled onto the motor shaft The feed amount of 0 141 mm is smalle
37. ead ASSY 3 Powering failure Nothing appears on the LCD Turning on the On Off dy key does not power the machine nothing appears on the LCD PIA adapter Driven by batteries or AC adapter By batteries Is the battery type correct Alkaline batteries LR6 Are the batteries loaded with right polarity Any breaks in the battery power cords Replace batteries with new ones and turn on the On Off db key Power supplied Load the correct type of batteries Correct the loading direction of those batteries Replace the power supply PCB ASSY End of repair The 3 3BV pin of C21 is normal within 3 3 0 15V Is the 3 3VCC line short circuited to GND The 5VCC is normal within 5 0 15V Is the 5VCC line short circuited to GND Transistor Q15 is normal Any of devices on the main PCB is defective or loosely soldered on the PCB Replace the main PCB Replace the main PCB 4 No key entry possible No key entry is possible Or no correct key entry is possible Clean the rubber key pad contacts or replace the rubber key pad Any dust or foreign material on the key contacts The key pad pattern is defective Replace the main PCB ASSY Is any key stuck to ON The CPU LSI is defect
38. emble the components by referring to the following pages Assemble the cutter lever onto the upper cover Pull down the roller release lever to the vertical position and set the main frame ASSY onto the upper cover For making the following jobs easier push the roller release lever to the horizontal position Secure the main frame ASSY to the upper cover with two screws Tightening torque 392 98 mNem 4 1 kgf cm Put the switch ASSY harness into the A of the upper cover 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 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 harness from getting hooked over the boss provided on the bottom cover when reinstalling the bottom cover Solder the DC motor harness to the DC motor PCB Note Be careful to the direction of the motor harness and not to stick out from the designated place when soldering CAUTION When soldering use the lead free solder 111 29 PT 1900 1910 DC motor harness Head cable Main frame ASSY Full cutter sensor harness DC motor harness Cutter motor harness Switch ASSY harness DC motor harness NS 5 uU y AN a Upper cover i Switch ASSY ha
39. essing the Print or Set keys When two or more lines are input the text cannot be printed because the installed tape is not enough wide lt Supplement gt After the message is disappeared the machine returns to the text input mode Final number setting mode When pressing the Print or Set keys When two or more lines are input the text cannot be printed because the installed tape is not enough wide lt Supplement gt After the message is disappeared the machine returns to the text input mode IV 18 Error Conditions Displa AAA U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA Function select mode LINE TROP DE ZUVIELE HHHHHHHHHH HSSSHHASTEHA Mela pressing the Set mr LIGNES ZEILEN HRRARRARRA ESESSSTAUE ey The Length setting is selected when two or more lines are input and the text cannot be printed because the installed tape is not enough wide lt Supplement gt After the message is displayed for 0 5 seconds the machine enters the fixed length print setting mode Text input mode LENGTH ___ LONGUEUR __ LENGTH___ LONGUEUR _ LIMIT LIMITE fo LIMIT LIMIT E When pressing the Print key The text you try to print is more than 1 meter Text input mode When pressing the Length key The text you try to print is more than 1 meter lt Supplement gt After the message
40. ey The output result is more than 10 digits lt Supplement gt After the message is disappeared the machine returns to the text input mode DIVIDE__BY __ ZERO_ERROR Currency data input mode When pressing the Set key The exchange rate is set to 0 lt Supplement gt After the message is disappeared the machine returns to the text input mode TEXT_TOO___ HIGH Text input mode When pressing the Length key The text cannot be printed because the installed tape is not enough wide lt Supplement gt After the message is displayed for 0 5 seconds the machine enters to the fixed length print setting mode Function select mode When pressing the Set key When the Length setting is selected the text cannot be printed with the width of the installed tape lt Supplement gt After the message is displayed for 0 5 seconds the machine enters to the fixed length print setting mode SURCAPA ERREUR ZERO FEHLER KURS 0 TEXT ZU___ HOCH ____ TROP HAUT IV 22 CUTTER _ ERROR TAB LIMIT HHHHHHHHHE HHHHHHHHHE HHHHHHHHHE HHHHHHHHHE TEXT TOO HIGH HHHHHHHHHE HHHHHHHHHE AAA IA U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA CUTTER ERROR _ TAB LIMIT OVERFLOW __ ERREUR COUPE TABULATION MAXI HHHHHHHHHE HHHHHHHHHE HHHHHHHHHE HHHHHHHHHE
41. g 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 the cutter sensor The moment the CPU receives the sensor signal it stops the cutter motor Cutter double gear Stationary blade Tape Movable blade Cutter moving gear Z Actuator Fig 2 1 5 Automatic Tape Cutter Mechanism PT 1900 1910 Il 6 2 1 5 Tape Cutter Mechanism PT 1850 The cutter unit consists of a stationary cutter and a movable cutter Pressing the cutter lever actuates the movable cutter so that the cutter cuts the printed 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 Stationary cutter Movable cutter Cutter lever Y Cutter sensor arm Switch Fig 2 1 6 Tape Cutter Mechanism PT 1850 Il 7 2 1 6 Roller Holder ASSY amp Cassette Cover Interlocking Mechanism Closing the cassette cover pushes down the roller release lever and brings the top of the lever into the hooked section provided
42. gle 4 4 A8 18 a 6171 5 w a8l111 Mel 6 E miel ES vais 7 a FT kN T 4 al a i 37 ABLA ka sei a E al B kd T del 39 ME sets 7 T all 11 e 34 ABL17 z MB ea kA a E 4 5 a 2 PER diis sua se E EM sum pt rm mis miss du D Lo e 4 Lee Lo oo Lo o Lo elo os feu s 5 E s ALB dia Tan en les elles le NE s ze ge q Lo e 4 Lo o Lo e Lo ot Lo o i Na Two a E d P Wy dio ser CE awe E 25 Ey o e p Lo ot o Lo o Lo o p Lo 5 4 patel FT NY T cala A Se t e Mars MATIS m h ex qe ac ser pm pF Em pu E TAA z TMS cs a fac B ow NP 2 o Ria 8 Le o 4 Lovo Loop Lo op lisos ml 8 i ong i gt fae os LE meere a aw ay E se p E us sg Lo og Le og Lo oe Lo ot Le o z TEYEERY ses se see ses ses ss ses m Loe Lo o o Lo oe Lo op Lo o loo o mie 5 aj Bg SE EE 8 8 a SS E S RES RE Wile Ep E se 564 E d Wen A B S Lo o o eo oe 9 0 oF o 0 CELL ME Le peti E an a one wp E I P ns ZRSR R 5958 pe e Lee Le oo Le os o o o wi ey t t t CET AN T E 3 B ern 3y Lot Ly C94 L9 Vg J IAN Y elec Ls Se DC MOTOR PCB TY i EY se jm pin ES 6 f i B 1 AE ma i da eye ha L i o py Me TO74HCTSPAF T
43. holder ASSY and roller holder release rod roller release lever 1 Secure the head ASSY to the main frame ASSYwith screw Tightening torque 490 98 mNem 5 1 kgf cm 2 Apply half of a rice sized pinch of grease Silicon grease G501 to the roller holder ASSY slideway for the roller holder release rod 3 First fit the roller holder release spring and the 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 Retaining ring Roller holder release spring Screw E Roller holder Roller release lever j Tem xa a Head ASSY Apply grease G501 here Roller holder release rod Main frame ASSY PT 1850 ela Retaining ring Roller holder release spring Roller holder P Foller release lever Head ASSY Apply grease G501 here Roller holder release rod Main frame ASSY Fig 3 2 16 Installing the Head ASSY and Roller Holder ASSY 111 36 8 Installing the Bottom Cover 1 Connect the power supply harness to the main PCB unit 2 Align the front edge of the bottom cover with that of the 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 Bottom cover Main PCB unit e_2 Upper cover PT 1850 Bottom cover Main PCB unit Upper cover F
44. ics of PT 1900 1910 1850 11 10 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 b 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 LCD 16x59 dot 20 Guidance LCD DRIVER U4 NAVI DIAL PT 1850 NJU 6450 ae 4 Mbit US ress bus RESET CIRCUIT Pirate aes TEMPERATURE SENSOR CIRCUIT CPU U6 EE H8S 2312 DETECTOR CIRCUIT INCL 8KB RAM THERMAL PRINT HEAD DRIVER 128 ELEMENT POWER ON OFF CIRCUIT OSCILLATOR CIRCUIT CASSETTE SENSOR CIRCUIT 5 bit SOLDER POINTS CUTTER SENSOR CIRCUIT DC MOTOR DRIVER CIRCUIT DS MOTOR CUTTER MOTOR KEY CONTACTS DRIVER CIRCUIT CUTTER MOTOR FOR 50 KEYS AND ONE PT 1900 1910 PT 1900 1910 On Off Key Fig 2 3 1 Block Diagram of Main PCB 11 11 2 3 2 Solder Points Solder points 1 through 5 customize the machine for the destination Solder points A through C are used for the individual thermal head properties The CPU reads the solder point status once in the powering on sequence to
45. ig 3 2 17 Installing the Bottom Cover 1 111 37 4 Secure the bottom cover with four screws Tightening torque 392 98 mNem 4 1 kgf cm PT 1900 1910 Screws Y Bottom cover Screws SR E S PT 1850 Screws Bottom cover a E RC KO Fig 3 2 18 Installing the Bottom Cover 2 111 38 9 installing the Cassette Cover 1 Place the machine rightside up 2 Liftup the roller release lever 3 Hold the cassette cover at an angle shown 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 Cassette cover Roller release lever Hinge Upper cover a PT 1850 Cassette cover Roller release lever Upper cover Fig 3 2 19 Installing the Cassette Cover 111 39 10 Installing the Tape Cassette and Tape Separator Stick 1 Fully open the cassette cover The roller release lever pops up 1 2 Insert the tape separator stick into the 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 Tape separator stick Cassette cover Roller release lever Tape cassette PT 1850 Cassette cover Roller release lever Tape cassette Fig 3 2 20 Installing the Tape Cassette and Tape Separator Stick 111 40 11 Loading
46. ive The key scanning signal e Replace the main PCB ASSY is normal Replace the main PCB ASSY or the rubber key pad 5 Tape cutting failure Tape cannot be cut CUTTER ERROR message displayed on the LCD PT 1850 Tape jammed and pinched in the cutter PT 1850 Replace the cutter ASSY The cutter is driven normally but it has dull blades causing cutting problems PT 1900 1910 PT 1900 1910 Replace the cutter ASSY Remove the jammed tape into place Then press the On Off D key to initialize the cutter and reload the tape cassette End of repair Tape can be cut Replace the cutter ASSY Are the cutter motor harness and cutter sensor harness connected correctly without any breaks Does the motor rotate when powering on the machine Check the cutter drive mechanism and replace parts if defective If no defective part is found replace the cutter sensor ASSY Fix them If any break is in those harnesses replace the cutter motor ASSY or the cutter sensor ASSY Replace the cutter motor ASSY 6 Abnormal LCD indication Certain display position s shows abnormal indication Output signals from LCD driver U4 are norma
47. k is finished SOLDER X Fig 1 Inspection Mode The mode is used after the machine is repaired or assembled The mode includes the following nine modes Information Mode Key Inspection Mode Jog Dial Inspection Mode for PT 1850 only Cassette Sensor Inspection Mode Cut Mode Print 1 Mode Print 2 Mode Motor Mode Voltage Check Mode For the details on the Motor Mode and Voltage Check Mode they are omitted in this section because they are not related to the inspection INFO MODE Fig 2 Information Mode The display as shown in Fig 2 is indicated when the machine goes into the inspection mode or when the 1 key is pressed By pressing the P key in the Information mode the country and head rank are displayed and the input power supply is checked 111 42 2 1 1 Country Display The country display shows the country specification as designated by the solder points 1 to 5 ROM Country LCD Display Solder Points U ACANA U K Specification Specification Low fx RES xxx emn x oe mew m x xo x sw xX x xo 2 1 2 Head Rank Display The head rank shows the rank as designated by the solder points A to C The B rank is defined as the setting for no soldering 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 th
48. l The LCD is not mounted correctly Replace the main PCB ASSY IV 10 Y LCD driver U4 is defective Replace the main PCB ASSY 7 Tape cassette type not identified The tape cassette type cannot be identified correctly The cassette sensor cable is normally connected Connect it normally Any of the lines in the cassette sensor cable is broken Replace the cassette sensor PCB ASSY N The main PCB may be defective Replace it IV 11 4 2 ERROR MESSAGE 4 2 1 Error Message List The error message list is shown as follows Error Conditions When the power is ON CODE K Check system finds any problem in the ROM checksum for all ROM data When the power is ON CODE K The same kind of two or more solder points is ON or the solder point is not correct When the power is ON The wrong adapter which supplies higher voltage is used lt Supplement gt When the message is disappeared the system is turned OFF after approx two seconds While printing The batteries are weak The message is displayed after printing lt Supplement gt After the message is disappeared the machine returns to the text input mode While feeding the tape The batteries are weak The message is displayed after feeding lt Supplement gt After the message is disappeared the machine re
49. le provided in the moving blade Cutter motor ASSY Screws b Cutter moving gear ER Washer Screw c Full cutter sensor PRO ASSY AAN Screw a ISS M NS Cutter ASSY Apply grease Cutter double G501 here gears Actuator Fig 3 2 13 Installing the Cutter ASSY PT 1900 1910 111 33 Installing the cutter sensor folder ASSY and cutter ASSY WARNING Take care not to touch the cutter of the cutter ASSY 1 Secure the cutter ASSY to the chassis ASSY 1850 with screws b Tightening torque 588 98 mNem 6 1 kgf cm Hook the spring as shown below Make sure that the cutter ASSY is fittes on the side of the chassis ASSY 1850 without any gap Catch the three hooks on the cutter sensor arm onto the cutter ASSY to assemble the cutter sensor arm Secure the cutter sensor folder ASSY onto the chassis ASSY 1850 with screw a Tightening torque 147 49 mNem 1 5 0 5 kgf cm PT 1850 Chassis ASSY 1850 Cutter ASSY Hooks Screw b Cutter sensor folder ASSY Cutter sensor arm Movable cutter Fig 3 2 14 Installing the Cutter ASSY PT 1850 111 34 Installing the DC motor ASSY 1 Install the DC motor ASSY to the chassis ASSY with two screws taking care not to damage the gear Tightening torque 147449 mNem 1 5 0 5 kgf cm O DC motor ASSY Chassis ASSY Fig 3 2 15 Installing the DC Motor ASSY 111 35 Installing the head ASSY roller
50. lockwise will shorten the tape feeding length rotating it counterclockwise will lengthen it Hole for adjusting the VR1 A Fig 20 111 47 CHAPTER IV TROUBLESHOOTING AND ERROR MESSAGE 4 1 TROUBLESHOOTING This section gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with this machine It is impossible to anticipate all of the possible troubles which may occur in future and determine the troubleshooting procedures so this chapter covers some sample troubles However those samples will help service personnel pinpoint and repair other defective elements if he she analyzes and examines them well 4 1 1 Precautions Be sure to observe the following precautions to prevent the secondary problems from happening during troubleshooting 1 Get a good idea of what the trouble is Whenever 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 choose the output level of 11 to 13V When connecting it to this machine be careful with the polarity 4 When using a circuit tester for testing the conductivity remove
51. nbetween under a uniform load by the roller holder upper spring and roller holder lower spring At the same time the sub roller gear becomes engaged with the tape idle gear If you open the cassette cover the roller release lever pops up which shifts the roller holder release rod so that the roller holder ASSY is retracted from the head ASSY providing you with enough space to replace the tape cassette Head ASSY aa Laminate tape Tape cassette Adhesive base tape C Platen idle gear Tape feed roller Ink ribbon Tape feed sub roller Main frame ASSY Roller release lever Platen roller Shaft Roller holder release rod Roller holder ASSY Tape feed platen gear Platen roller Platen lower spring Tape feed sub roller gear CS K J LS Platen upper spring E Ss 7 LA Af C g 7 Fig 2 1 2 Roller Holder ASSY Setting amp Retracting Mechanism SEE A To Tape feed sub roller Top Il 3 2 1 3 Tape amp Ribbon Feed Mechanism This mechanism consists of a DC motor gear train and roller holder ASSY 1 Tape Feeding When you load a tape cassette and close the cassette cover the tape feed roller inside the cassette and the tape feed sub roller in the roller holder ASSY sandwich the tape the laminate tape and adhesive base tape when using laminated tape cassettes inbetween as
52. ne uses thermal transfer printing The thermal print head has a heat generator consisting of 112 heating elements which are vertically aligned as shown in Fig 2 1 1 Each heating element is 0 195 mm wide by 0 141 mm high 0 141 mm 5 6 mils 15 792 mm 2d 112 elements C1 3 0 195 mm 7 7 mils Fig 2 1 1 Heat Generator of Thermal Head 2 Printing Process When the cylindrical rubber platen is pressed against the thermal print head with the tape and ink ribbon sandwiched inbetween the CPU applies electric power to the selected ones of those 112 heating elements Laminate tape when using laminated tape cassettes Non laminated tape when using non laminated tape cassettes Instant lettering tape when using instant 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 stamp tape cassettes If the selected 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 th
53. oncebee 1 10 ked ita ic ett RN UE 1 10 AZ MU lico erue pen 1 10 13 KEY COMMANDS FOR SPECIAL FUNCTIONS cnica naar rancia 1 10 A A TETTE 1 10 132 Denon FAN acceso ca 1 10 CHAPTER Il GENERAL MECHANISWMS eene nnn nnns 11 1 2l MAINME CRA ES ERREUR Il 1 Skt ll AS s Il 1 2 1 2 Roller Holder ASSY Setting amp Retracting Mechanism Il 3 Ale ape amp Ribbon Feed Mechans sica ina aana Il 4 2 1 4 Automatic Tape Cutter Mechanism PT 1900 1910 eseese Il 6 2 1 5 Tape Cutter Mechanism PT 1080 cocino ci 1 7 2 1 6 Roller Holder ASSY 8 Cassette Cover Interlocking Mechanism 11 8 22 OUTLINE OF CONTROL ELECTRONICS coi dd 11 10 221 Gomiguisti n OT ING ElScironte Pase 11 10 ce E MA PR o 11 10 Bl nt 11 10 ENG o RE 11 10 Es cia 11 10 220 RTPA PN MER t 11 10 2 B MAIN PCB mae hh MR RARRRRNARARRRRARARARARRARARRARARARRRRARNRARARRERSARARARARRAERARARARARRRRAERERARARRRRARRRARARRANARRERAR 297 cl mme E RET 4 M42 2 3 2 Solder Points CHAPTER Ill DISASSEMBLY amp REASSEMBLY nennen 11 11 11 11 11 13 Ill 1 1 1 1 Removing the Battery Lid and Batteries HT 2 3 4 5 6 7 9 3 2 REASSEMBLY PROCEDURE PON Removing the Main PCB o a Removing the Switch ASSY E Removing the Power Supply PCB E 1 Installing the Power Supply PCB 5 6 7 8 9 co N o a Installing the Bottom Cover
54. or 4 key in the display of Fig 13 CUT Fig 14 The display as shown in Fig 15 is indicated by pressing the SML key and the tape is fed After the tape is fed cut the tape automatically or manually CUT 1 is displayed at that time FEED 1 FEED 1 CUT 1 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 FEED 2 FEED 2 CUT 2 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 FEED 3 FEED 3 CUT 3 Fig 17 After cutting the tape shift to 2 5 Print 1 Mode Fig 18 display 111 46 2 5 Print 1 Mode The display as shown in Fig 18 is indicated by cutting the tape or pressing the 5 key in the display of Fig 17 PRINT 1 Fig 18 Printing is started by pressing the PN key Fig 18 display After printing all memory is initialized and the power is turned OFF 87 2 4 4mm 61 2 3 1mm 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 c
55. pe cassette PT 1850 Tape cassette Fig 3 1 2 Removing the Tape Cassette 111 2 3 Pull the tape separator stick up PT 1900 1910 Tape separator stick PT 1850 Tape separator stick Fig 3 1 3 Removing the Tape Separator Stick 111 3 3 Removing the Bottom Cover 1 Close the cassette cover while pressing down section B 1 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 Cassette cover Screws Bottom cover Screws Fig 3 1 4 Removing the Bottom Cover 1 PT 1900 1910 1 4 PT 1850 Cassette cover he tion B Zs A S p qu m Section B EO Screws Bottom cover SS Fig 3 1 5 Removing the Bottom Cover 1 PT 1850 I11 5 5 6 Separate the bottom cover from the upper cover Open the bottom cover to the left as shown below 7 Discharge the condenser C1 on the main PCB unit with tool like a flat screwdriver 8 Disconnect the power supply harness from the main PCB unit 9 Remove the screw that secures the grounding wire to the main frame ASSY PT 1900 1910 Bottom cover Grounding wire Condenser C1 Flat screwdriver Power supply harness Main PCB unit Upper cover Main PCB unit PT 1850 Bottom cover Grounding wire Condenser C1
56. r than the width 0 195 mm of the heating elements so that the heat generated at one heating cycle will overlap with the next heating cycle This forms a character having no gap between adjacent printed dots Il 2 2 1 2 Roller Holder ASSY Setting amp Retracting Mechanism This mechanism consists of the roller release lever roller holder release rod and roller holder ASSY The roller holder ASSY supports the platen and the tape feed sub roller so that they can move perpendicularly to the head ASSY and the tape feed roller respectively as well as rotating freely Loading a tape cassette and closing the cassette cover pushes down the roller release lever which moves the roller holder release rod to the left when viewed from the front of the machine This pivots the roller holder ASSY around the shaft provided on the chassis so as to press the roller holder ASSY against the head ASSY side The platen is pressed perpendicularly against the head ASSY 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 upper 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 i
57. rness e Main PCB unit Main frame ASSY Cutter motor ASSY gt El Head cable T g DC motor harness Full cutter sensor PRO ASSY IL Cutter motor harness O o o Full cutter sensor harness dl T een gt LLL Switch ASSY harness Fig 3 2 10 Installing the Main Frame ASSY 1 PT 1900 1910 111 30 PT 1850 F Sasi aa SA DC motor harness Head cable Cutter sensor harness Main frame ASSY DC motor harness Cutter lever Switch ASSY harness Cutter lever DC motor harness 4 Upper cover Switch ASSY harness Main PCB unit Main frame ASSY Cutter sensor Cutter sensor harness Power supply harness Main PCB unit Switch ASSY harness Fig 3 2 11 Installing the Main Frame ASSY 1 PT 1850 111 31 7 Solder the six switch ASSY harnesses onto the main PCB unit Note Be careful to the direction of the switch ASSY harness and not to stick out from the designated place when soldering switch ASSY harness CAUTION When soldering use the lead free solder PT 1900 1910 Main frame ASSY Ko SH Black K5 SH Green K4 C94
58. the motor gear and the mating gear Rotate the ribbon drive cam counterclockwise by hand to check that the rotating torque is within 68 to 108 mNe m If the torqu is out of the specification replace 9 the main frame ASSY Ribbon drive cam After loading a tape cassette Rotate the ribbon drive cam counterclockwise to remove excessive ribbon slack Any faintly printed characters Any horizontal streaks in printed characters Normal printing Head connector CN1 on the main PCB is normal Replace the batteries or use the optional AC adapter Check that the platen is set into place and works normally f the printed characters become faint in cycles the tape feed sub rollers gear in the roller holder ASSY may be deformed Replace the roller holder ASSY Check that the center of the thermal print head is within 0 1 mm from the platen center If it is shifted greatly loosen the screw on the head ASSY and adjust the ASSY Head surface Platen Screw Head ASSY Platen center Replace the tape cassette Check that there is no dust on the platen or the thermal print head End of repair Head connector CN1 is defective Replace the main PCB ASSY The main PCB is defective Replace the main PCB ASSY d The print head is defective Replace the h
59. turns to the text input mode SOLDER _ X _ SOLDER _ X WRONG____ ADAPTER BATTERIES _ WEAK ROM FEHLER ___ ROM PROBLEM y y Diy U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA ROM ____ PROBLEME __ PROBLEM ROM ____ PROBLEME _ ROM SOLDER_ X__ CHANGER ___ ADAPTATEUR PILES USEES IV 12 SOLDER _ X __ SOLDER _ X FALSCHER ADAPTER BATTERIEN __ SCHWACH __ CHANGE ___ ADAPTOR __ BATTERIES _ WEAK CHANGER __ ADAPTATEUR PILES US ES Error Conditions Displa ee IA U K BELGIUM FRENCH GERMAN U S A CANADA AUSTRALIA While printing REPLACE ___ REMPLACER __ BATTERIEN REPLACE REMPLACER The batteries are empty BATTERIES PILES WECHSELN _ BATTERIES PILES The message is displayed while printing lt Supplement gt After the message is disappeared the machine returns to the text input mode While feeding the tape The batteries are empty The message is displayed while feeding lt Supplement gt After the message is disappeared the machine returns to the text input mode When the power is ON The system is turned OFF while printing lt Supplement gt After the message is disappeared the opening message is displayed Text input mode BUFFER __ MEMOIRE ____ SPEICHER ___ BUFFER ___ M MOIRE ___ When pressing the i i normal Character key FULL PLEINE VOLL FUEL PLEINE
60. type PT 1850 2 Cutter unit Not user replaceable Length Underline A Frame Font Font2 A A A A Mirror Memory D a o a GN ES D D ES ES Num DD Tab Length Dl GG 26 2 GG EBOOOEOOSO Symbol Accent MODOOOOVOWE Caps A Cut G9 65000 C9C90 500009020 Feed amp Cut CD e SLB PT 1900 U S A CANADA PT 1910 U S A Fig 1 1 2 Key Arrangement 1 AAA Length Underline Font Font2 A A A A Mirror Memory a o a GN ES D D O T DD Tab Length DID E G A Format DID 22 JQ SSOOSSOSO O Accent MOOCOOOOWM MME Caps A Cut SOQOYOVLIO e pel 5 C22 PT 1900 AUSTRALIA Fig 1 1 2 Key Arrangement 2 AAA Acco Longueur LETTERING 8 ABC Police1 Police A A A A lt brother Miroir Ya NS Cr NA M moire CA Taille Largeur Style Entr e Rappel Ef M lt Ligne Efface Q QOQO GOOO 9 Tab Ali H Longueu 606060 9 00 0 G0 2 CO CD OO OOOO OOOO Symbole Accent Config 25 A P PT 1850 FRENCH Fig 1 1 2 Key Arrangement 3 AAA A LANGE brother FONTI FONT2 A A AA A lt SPIEGEL FONT ES S ES SPEICH e D a O FREI Gs TA ES G TAB LANGE 20 SESHOSOOSO CAPS OOOO OOS SYMBOL AKZENT ENST GE KONV DOI IR a S PT 1850 GERMAN Fig 1 1 2 Key Arrangement 4 AAA Ac Length LETTERING AA ABC y Dsrsrtu O Font Font A A A A lt Memor Function Font Size Wide Style ABC ABC
61. your finger to check that they pop up normally Switch ASSY Fig 3 2 6 Checking the Switch ASSY 111 25 5 Installing the Rubber Key Pad 1 Assemble the emblem onto the upper 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 Rubber key pad Upper cover PT 1850 Rubber key pad Fig 3 2 7 Installing the Rubber Key Pad 111 26 6 Installing the Main PCB Unit 1 Put the navi dial onto the DC motor PCB PT 1850 only Navi dial DC motor PCB Main PCB Fig 3 2 8 Installing the Main PCB Unit 1 111 27 2 Pull the positions A outwards to put the LCD with the main PCB unit into the position B 3 Check that there is no foreign material or dust on the key contacts on the main PCB unit Note Make sure that the two latches of the 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 Screw DC motor PCB Main PCB Main PCB unit PT 1850 DC motor PCB Main PCB Main PCB unit Fig 3 2 9 Installing the Main PCB Unit 2 111 28 7 Installing the Main Frame ASSY 1 2 3 95 If the main frame ASSY has been disassembled ass
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