TTP-243 Plus
Contents
1. 14 id rrr 16 BA Memory System csore eaa ea 16 S FONS KEV 17 3 5 Real Time Glock GIFOlE cse desee tates ke E 18 3 7 Decode ROUEN 19 3 8 Thermal Head Drive Protection and History Control 21 3 9 24V 5V Convener CAFGUIE eiecti Pon ep DELETE PU DR OR ERE Den 22 3 10 Stepping Motor And DC Motor Driver Protection Circuit 23 3 11 Communication Serial amp Parallel Port 24 3 12 Cutter Drive Circuit 25 3 13 Cutter amp Peel Translate Board hg bt a dett ed mona delet 25 3 14 Mainboard o rr rr eR RAE IY ER naar ri a ERG 26 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 3 15 Cutter DC Motor Stepping Motor Driver IC 30 4 MECHANISM m 31 4 1 Gutter Installation Fete ra eun ku EE Ex Er gu nea 31 4 2 Print Head Replacement 5 t t eet eet uet Ure E HER ES 32 4 3 DC Motor Replacement oq tnde doe E ck kx 34 4 4 Ribbon Rewind Spindle Encoder 32. CT EN DC PHASE TPH EN BUZZER 00DO 0000 USB DO USB USB D1 USB D2 USB D3 USB D4 USB D5 USB D6 USB D7 00 0 0000 P DO CENTRONIC P D1 DATA P 02 P D3 P 04 P 05 P D6 07 00 0 0000 LED1 OTHER ENABLE LED2 LED3 SLCT ERROR RTC RESET RTC CLK 20 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds Your Thermal Printing Needs 3 8 Thermal Head Drive Protection and History Control Circuit zm Fig 3 9 Thermal Head Drive Protection and History Control Circuit This is the thermal head drive circuit CLK and LAT connected to thermal head control clock and data latch respectively TPH EN controls the DC24V voltage of the thermal head When TPH EN is LOW the thermal head will be separated from 24V STB1 STB4 determines whether to heat the thermal head or not DI sends the printer data to the print head TM is the temperature for thermal head Vdet feeds back the voltage and compensates the heat time for voltage accuracy when printing 21 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 3 9 24V 5V Converter Circuit DC POWER
3. logos on various types of labels and tickets by direct thermal or thermal transfer printing 2 This printer adopts a BASIC like high level programming language to help users programme the desired label forms with ease 3 This bar code printer can be connected to a personal computer or an optional LCD keyboard to execute the programs downloaded in the printers memory The printer is equipped with the following standard devices black mark sensor peel off module and real time clock 4 This bar code printer provides a selection of optional features including cutter module memory module portable LCD keyboard etc 5 The user friendly labeling software package is bundled with printer 1 2 Model Naming Syntax T T P 2 4 3 1 Q 3 4 1 Print method Thermal Transfer Printing TDP Thermal Direct Printing 2 Resolution of print head DPI 3 Maximum print width Inch 4 Maximum print speed Inch Sec TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 1 3 Overview 1 3 1 Front View Operation Panel Top Cover Cover Release Button Front Panel Fig 1 1 Front View Note The one difference between TTP model and TDP model is the ribbon mechanism TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 1 3 2 Rear View Label Entranc
4. DC motor and is used to detect if the ribbon is unerringly rewound by the spindle The encoder is connected to JP6 on the mainboard Please switch the printer to thermal transfer mode The multi meter is used 34 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds Your Thermal Printing Needs to measure the voltage of Pin2 5V If the voltage changes continuously from 0 to 5 volts DC the encoder is in condition Otherwise please follow the steps below to replace the encoder PCB 1 Follow directions in Section 4 3 to remove DC motor and DC motor fixture DC Motor Encoder Fig 4 5 DC Motor Encoder 2 Remove the two flat tap screws and cable tie 3 Replace the Encoder PCB 4 Reassemble the removed parts in the reverse order of removal 35 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 4 5 Felt Fabric Replacement Felt Fabric is located in the ribbon supply spindle It is used to tighten the ribbon to prevent it from getting wrinkled during printing If the ribbon can not be tightened when label back feeds during printing please replace with a new felt to secure the best printing quality Follow the steps below to replace the felt fabric 1 Follow the instructions in Section 4 3 to remove DC motor and DC motor fixture 2 Remove the E ring and washer on ribbon supply spindle E
5. PA11 Pull Up Active CS1 CS1 PA12 O WRL PA13 O WRH No use PA14 O RD RD PA15 Pull Up Enable PA15 LAT for TPH PBO O A16 A16 PB1 O A17 A17 PB2 O RAS RAS PB3 O CASL CASL PB4 O CASH CASH PB5 O RDWR RDWR PB6 O A18 A18 PB7 O A19 A19 PB8 O A20 A20 PB9 O A21 A21 PCO PC15 O 0 15 0 15 PDO PD15 DO D15 DO D15 PEO O PWM Enable TIOCOA GAP LEVEL PE1 Pull Up PE1 KEYS PE2 Pull Enable PE2 CASE OPEN RES Pull Up Enable STTOBE for Centronic port 4 O PWM Enable for DC motor enable PES Up Enable PE5 STB1 for TPH 6 Pull Up Enable PE6 DC SENS for DC sensor Pull Up Enable STB2 for PE8 Pull Up PE8 KEY2 PE9 Pull Up PE9 10 Pull Up Enable PE10 STB3 for TPH PE11 Pull Up Enable PE11 CT SENS for cutter sensor PE12 I O Up PE12 SUSPEND for USB PE13 Pull Up Enable PE13 STB4 for TPH PE14 14 RTC I O PE15 _ Pull Up Enable PETS HEAD SENS PFO PFO Vdet for TPH Voltage detect PF1 PF1 TM for TPH temperture 14 TTP 243 Plus 243E Plus 342 Plus Bar Code Printer TSC Connecting Your Thermal Printing Needs PF2 Enable PF2 MEM load amp Hardware version CT DETECT PF4 PEEL SENS PFS 5 RIBBON SENS PF6 PF6 BM SENS PF7 PEZ GAP SENS NMI Pull Up NMI No use RESETP Pull U
6. Remove the screw on the PCB of peel off and cutter connector Remove the screws in the lower left lower right corners of the main mechanism Cf Fig 3 17 9 Remove all four screws of the internal label roll mount Cf Fig 3 18 10 Move the mechanism in the label feed direction about 5 mm 11 Take out the internal label roll mount and remove the connector Cf Fig 3 19 12 Remove the screw of ground wire on the mainboard 13 Remove all the connectors on mainboard JP1 JP2 4 JP5 JP6 JP7 JP11 JP7 JP9 JP12 14 Take out the mechanism 15 Remove one flat tap screws and black mark sensor PCB NOOA ON gt Fig 4 10 Black Mark Sensor and Gap Receiver Sensor 16 Reassemble the removed parts in the reverse order of removal 4 8 Ribbon Sensor Receiver Replacement Turn off the printer power Remove the power cord and RS 232 and or parallel port cable Open the top cover of the printer Remove the printer front panel Cf Fig 3 14 39 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs Remove the two screws and the metal cover Cf Fig 3 15 Release the cable tie and remove the peel off sensor connector Cf Fig 3 16 Remove the screw on the PCB of peel off and cutter connector Remove the screws in the lower left lower right corners of the main mechanism Cf Fig 3 17 9 Remove all four screws
7. Ring xd Spring Holder Washer Spring Spring Cover Felt Clutch Compression Spring Felt Fabric Fig 4 6 Components of the Ribbon Supply Spindle 3 Remove the spring cover compression spring and spring holder 4 Remove the spring felt clutch and felt fabric 5 Replace with a new felt Fig 4 7 Side View of the Ribbon Supply Spindle Assembly 36 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 6 Reassemble the removed parts in the reverse order of removal Fig 4 8 Front View of the Ribbon Supply Spindle 37 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 4 6 Stepping Motor Replacement Turn off the printer power Remove the power cord and RS 232 and or Parallel port cable Open the top cover of the printer Remove the printer front panel Cf Fig 3 14 Remove the two screws and the metal cover Cf Fig 3 15 Release the cable tie and remove the peel off sensor connector Cf Fig 3 16 Remove the screw on the PCB of peel off and cutter connector Remove the screws in the lower left lower right corners of the main mechanism Cf Fig 3 17 9 Remove all four screws of the internal label roll mount Cf Fig 3 18 10 Move the mechanism in the label feed direction about 5 mm 11 Take out the internal label
8. V V 10000 35 AGND DGND Fig 3 10 24V 5V Converter Circuit Figure 3 9 is the DC TO DC DC24V to DC 5V converter circuit which is a step down system circuit structure U24 is the DC TO DC converter IC which can convert voltage by using PWM control mode The output voltage is dependent on R3 and R4 22 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 3 10 Stepping Motor And DC Motor Driver Protection Circuit coe ft ST E po ei Fig 3 10 Stepping Motor And DC Motor Driver Protection Circuit This is the Stepping Motor Drive Connector JP12 sends the pattern as shown in table1 The status of l0 amp 11 determines the stepping motor power level the power level pattern is shown in table2 PHASE1 and PHASE2 determine the pattern of stepping motor drive circuit For example the sequence of PHASE1 PHASE2 in full step mode is 0 0 0 1 1 1 gt 1 0 Table Stepping Motor Pattern MOTOR CURRENT 0 11 HIGH LEVEL 100 L MEDIUM LEVEL 60 LOW LEVEL 20 L H ZERO CURRENT 0 H Table2 Stepping motor power pattern The power of DC motor is on when pin is at LOW level DC PHASE determines the DC motor run direction forward or backward 23 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your T
9. Your Thermal Printing Needs Your Thermal Printing Needs 4 3 DC Motor Replacement Turn off the printer power Remove the power cord and RS 232 and or parallel port cable Open the top cover of the printer Remove the printer front panel Cf Fig 3 14 Remove the two screws and the metal cover Cf Fig 3 15 Release the cable tie and remove the peel off sensor connector Cf Fig 3 16 Remove the screw on the PCB of peel off and cutter connector Remove the screws in the lower left lower right corners of the main mechanism Cf Fig 3 17 Remove all four screws of the internal label roll mount Cf Fig 3 18 10 Move the mechanism in the label feed direction about 5 mm 11 Take out the internal label roll mount and remove connector JP1 Cf Fig 3 19 12 Remove the screw of ground wire on the mainboard 13 Remove all connectors on the mainboard 14 Take out the mechanism 15 Remove the cable tie 16 Remove the three screws on DC motor fixture GT OX Ie DC Motor Fixture Fig 4 4 DC Motor Fixture 17 Remove the two screws used to fix DC motor on the fixture 18 Replace the DC motor and pull out the cables in connector No 6 Note The colors of DC motor wires in connector No 6 are yellow outside and green inside 19 Reassemble the removed parts in the reverse order of the removal 4 4 Ribbon Rewind Spindle Encoder Replacement The encoder is installed on the gear box of
10. of the internal label roll mount Cf Fig 3 18 10 Move the mechanism in the label feed direction about 5 mm 11 Take out the internal label roll mount and remove the connector Cf Fig 3 19 12 Remove the screw of ground wire on the mainboard 13 Remove all the connectors on mainboard JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP11 JP7 JP9 JP12 14 Take out the mechanism 15 Remove the screws springs and spring bushing on both sides of the mechanism Print Head Sensor Cover Flat Tap Screw Fig 4 11 Ribbon Sensor Cover 40 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs Fig 4 12 Ribbon Sensor Fig 4 13 Spring Installation on Left Side and Right Side Note The left side spring and the right side spring are different in shape The right side spring has a straight end when the left side spring has an end that is curved 90 degrees 16 The main mechanism is divided into upper mechanism and lower mechanism 17 The ribbon sensor receiver is located in the upper mechanism 18 Remove the screws on the ribbon sensor cover 19 Replace with a new ribbon sensor PCB 20 Reassemble the removed parts in the reverse order of removal 41 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds Your Thermal Printing Needs 4 9 Ribbon
11. roll mount and remove the connector Cf Fig 3 19 12 Remove the screw of ground wire on the mainboard 13 Remove all the connectors on mainboard JP1 JP2 4 JP5 JP6 JP7 JP11 JP7 JP9 JP12 14 Take out the mechanism 15 Remove the rest three screws on the mainboard 16 Remove the two screws of the stepping motor NOOA WD Fig 4 9 Stepping Motor 17 Replace the stepping motor and reassemble the removed parts in the reverse order of removal 38 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds Your Thermal Printing Needs 4 7 Black Mark Sensor Gap Sensor Receiver Replacement Black mark sensor is reflection type sensor It is connected to JP4 3 pin connector A multi meter is used to measure the signal of Pin2 to see if there is voltage variation when black mark is detected Before conducting the test please issue the BLINE command first The printer will switch from gap sensor to black mark sensor If there is no voltage variation please follow steps below to replace the black mark sensor gap sensor receiver PCB Turn off the printer power Remove the power cord and RS 232 and or parallel port cable Open the top cover of the printer Remove the printer front panel Cf Fig 3 14 Remove the two screws and the metal cover Cf Fig 3 15 Release the cable tie and remove the peel off sensor connector Cf Fig 3 16
12. 4 4 5 Felt Fabric Replacement eee e e e d LH ER 36 4 6 Stepping Motor 38 4 7 Black Mark Sensor Gap Sensor Receiver 39 4 8 Ribbon Sensor Receiver 39 4 9 Ribbon Sensor Transmitter Gap Sensor Transmitter Replacement 42 4 10 Platen REplaGeme nt va Leute d 43 5 TROUBLE SHOOTING iiie dio cine t iosix dose sed 46 baut prende esaet 46 5 2 Trouble Shooting oo Meee nette etate dedito 47 5 3 Calibrate the Gap eese ertet ott ee tale Pep tit e 48 ur SEM A RP ETE 48 55 OAM viene cocer Ee Sadat Cc a exact chm taU LM CO LE 48 5 6 Diagnosis Operation Procedure eer terea ene exte raum Re ae 48 5 r Sells TS cue eec eme pte Su dt edidic qb dp dde te 49 5 8 Cleaning the Print Head sc n ine e aS amit 51 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 1 FUNDAMENTALS ABOUT THE SYSTEM 1 1 Features of the TTP 243 Series 1 This bar code printer prints bar codes characters
13. 7 11 8 1 Modify ribbon base assembly part no Camille 2007 12 7 1 Modify power supply and external Ethernet print server parts Camille no CEC 2007 12 20 1 Modify PCB D Ass y part no Camille 2008 1 10 1 Modify part number for label roller mount and memory module cover Camille 2 Revoke part number for 98 1000017 00LF External Ethernet print server Z US and 98 1000018 00LF External Ethernet print server Z EU 2008 1 14 1 Modify description for 98 1000008 01LF External Ethernet print Camille server C US CEC and 98 1000009 00LF External Ethernet print server C EU 2008 3 18 1 Add lower cover ass y For parallel port part no Camille 2 Modify label roller mount part no from 20LF to 30LF 3 Add power adapter 62 0010021 02LF CEC for second source 2008 6 24 Remove the parts list section Camille 2011 1 25 Modify TSC address Camille 52 TSC TSC Auto ID Technology Co Ltd Corporate Headquarters 9F No 95 Minquan Rd Xindian Dist New Taipei City 23141 Taiwan R O C TEL 886 2 2218 6789 FAX 886 2 2218 5678 Web site www tscprinters com E mail printer sales gtscprinters com tech_support tscprinters com Li Ze Plant No 35 Sec 2 Ligong 1st Rd Wujie Township Yilan County 26841 Taiwan R O C TEL 886 3 990 6677 FAX 886 3 990 5577
14. I PD8 D8 PB7 IRQ5 A19 BREQ 52 PD9 D9 PBS IRQ6 A20 WATI PDIO DIO PBO IRQT A21 ADTRG 0 21 PDI2 DI2 PB2 IRQUPOEQ RAS RAS PD13 D13 PB4 IRQ2 POE CASH CASH PDIA DIA PB3VIRQUPOE CASI CASI RESET PDIS DIS PBS IRQ3 POE3 RDWR RESET AH PAIU CSI PAIA RD RD ROM2 as PAG TCLKA CS2 PAIZWRL o WRI ROMI 10 50 RTC 10 TNR PAT TCLKB CS3 RTC CRIC CIK RTC_RESET A STBI PES TIOCIB STB2 PET TIOC2B PAI3 WRH H STB3 PEIQ TIOC3C WDTOVE ORE E STB4 PE13 TIOC4B MRES j RAD SENS LAT PAISICK PEIS TIOCAD DACKUIRQOUT 25 gt HEAD SES HEAD SENS gt EN UN SENS GAP SENS gt RES T PAS SCKUDREQUIRQI PFGANG MERO SIN BM SENS DI PAA TXDI PFS ANS RIBBON SEN Vdet Vdet 9 PRUANO CHDI IM 9 KEY2 LED IM PFI ANI PES TIOC3A NEN KEY2 LED v PE9 TIOC3B KEYI LED3 CI D PF3 AN3 PEO TIOCOA DREQO LL GAP_LEVEI EEN H PEGTIOC2A PELTIOCOB DRAKO BM LEVEI PEA TIOCIA PE2 TIOCOC DREQI CTsens A PF4 AN4 POWER BLOCK IP22 SW POWER SCH PASTCLKCIRQ2Z 2 244929 2 1 2 SSSSSSSS 2 POWER DOW POWER DOWN SH2 7040 FOR 243 MEM LOAD BUZZER 2 Y LESE RESET DGND Title DGND Fig 3 1 MCU Circuit Diagram The above is the MCU circuit diagram The main board includes seven system blocks A MCU amp Decode System Memory System Prin
15. JP11 JP7 JP9 JP12 14 Take out the mechanism 15 Remove the two screws stepping motor and stepping motor cover Cf Fig 4 9 16 Remove the E ring and two gears ONOaAPWON Thermal Head Printer Carriage Release lever arm Gear 1 E Ring Gear 2 Fig 4 15 Location of E ring and Gears 17 Remove the E ring and the printer carriage release lever on the left side of the mechanism 18 Remove the E ring and the printer carriage release lever arm Fig 4 15 43 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Bracket Thermal Head Printer E Ring Stripper Bar Platen Bush Printer Right Side Carriage Release Lever Teflon Tube ERing M 59 LAM Fig 4 17 Printer carriage release lever arm and E ring 19 Remove the teflon tube and stripper rod Fig 4 18 20 Remove the E ring the right side and left side platen bushes Fig 4 19 21 Remove the stripper bar Fig 4 17 44 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs Teflon Tube Platen Bush Left Side E Ring Fig 4 19 Remove E ring and platen bush 22 Move the platen to the right of the mechanism 23 Replace the platen and reassemble the removed parts in the reverse order of removal 45 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printe
16. P 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 15 Cutter DC Motor Stepping Motor Driver IC Replacement FLASH Memory Y Wi Stepping DC Motor Cutter Driver IC Motor Driver IC Driver IC Fig 3 22 Driver IC Locations If the DC motor ribbon rewind spindle rotates back and forth please check the DC motor driver IC make sure it is firmly inserted in the IC socket and is not burned If the cutter does not work please check that the software or program has been switched to the cutter mode If the cutter still does not function please check the cutter driver IC make sure it is firmly inserted in the IC socket and is not burned The stepping motor driver IC is burned if the stepping motor makes noises but does not feed labels when the FEED key is pressed In this case please replace with a new driver IC Use an IC clamp to remove the damaged IC 30 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 4 MECHANISM 4 1 Cutter Installation Left Flange OO OGY qx QU AS et 10 11 Turn off the printer power Open the top cover of the printer Remove the printer front panel slowly and carefully Cf Fig 3 14 Remove the two screws and the metal cover Cf Fig 3 15 Release the cable tie and remove the peel off sensor connector Cf Fig 3 16 Remov
17. R ENII 19 LEDI USB DO 2 22 ES 18 LED2 17 LED3 Dalh 16 PE Di 5 15 SLCT 7 139 Dice h Us 14 ERROR ce 13 RIC RESET 8 12 RIC CLK i e O D6 RIC CER 8 D7 104 JP21 GND 10 _ RESET 0 DOWNLOAD RD DGND 74AHCTS74FT WRL 2 Y3 ROM2 10 5 MOTOR DATA Y2 11 Yl B 13 A21 ROMI 12 YO A 14 y 74AHCT32 DGND 74AHCT139 DGND T5V U30B PROTECT 4 6 MOTOR PROTECI TAAHCT32 MOTORS amp CUTTER ou yea 20 MOTORS amp CUTTER S j a a UE 1 CT DETEC x DO 2 Qo PHASEL PHASEIDC SEN pica 0 50 gt PHASE2 bz 1 92 de1 2n CT SEN D2 Q3 gt l PEEL SE D3 5 15 EN L D3 Q4 oo gt CTEN D4 6 14 DC PHASE 1 p D4 Q5 gt DC PHASE D5 7 55 06 13 TPH EN D6 8 gt 12 BUZZER D6 Q7 D7 9 Dg 10 GND 7AAHCIS74FT DGND 19 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs CSO CS1 CS2 CS3 0000 0000 003F FFFF 0040 0000 007F FFFF 0080 0000 00BF FFFF 00 0 0000 OFFF FFFF a ROM1 0000 0000 001F FFFF ROM2 0020 0000 003F FFFF Memory card 0040 0000 007F FFFF Download ROM 0800 0000 09F FFFF DRAM 0100 0000 011F FFFF Other Map Address Function 00 0 0000 5 1 MOTOR DATA PHASE2 10 l1
18. S that detects the action of cutter 3 13 Cutter amp Peel Translate Board 2 CON3 CON4 Cc 127 d p e 2 lt Cutter and peel connector circuit JP1 connect to peel module JP2 connect to cutter module JP3 connect to main board JP3 25 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 14 Mainboard Replacement 1 Turn off the printer power 2 Remove the power cord and RS 232 and or parallel port cable 3 Open the top cover of the printer 4 Remove the printer front panel Fig 3 14 Remove the front cover in the direction of the arrows 5 Remove the two screws and the metal cover Screws Metal Cover Fig 3 15 Remove the screws and metal cover 26 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 6 Release the cable tie and remove the peel off sensor connector Peel Off Sensor Connector Cable Tie Cutter Connector Fig 3 16 Cable tie and peel off sensor connector 7 Remove the screws on the lower left and lower right corners of main mechanism Fig 3 17 Remove the screws in the lower left lower right corners of the main mechanism 27 TTP 243 Plus 243E Plus 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing N
19. Sensor Transmitter Gap Sensor Transmitter Replacement 1 Please follow the steps in Section 4 6 to separate the upper mechanism from the lower mechanism 2 The ribbon sensor transmitter is located in the center of the lower mechanism 4 RIBBON Fig 4 14 Ribbon Sensor Transmitter 3 Remove the two flat tap screws 4 Remove the cable tie and sensor PCB 5 Replace with a new PCB Reassemble the removed parts in the reverse order of removal 42 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 4 10 Platen Replacement Turn off the printer power Remove the power cord and RS 232 and or parallel port cable Open the top cover of the printer Remove the printer front panel Cf Fig 3 4 Remove the two screws and the metal cover Cf Fig 3 15 Release the cable tie and remove the peel off sensor connector Cf Fig 3 16 Remove the screw on the PCB of peel off and cutter connector Remove the screws in the lower left lower right corners of the main mechanism Cf Fig 3 17 9 Remove all four screws of the internal label roll mount Cf Fig 3 18 10 Move the mechanism in the label feed direction about 5 mm 11 Take out the internal label roll mount and remove the connector Cf Fig 3 19 12 Remove the screw of ground wire on the mainboard 13 Remove all the connectors on the mainboard JP1 JP2 JP3 JP4 JP5 JP6 JP7
20. TTP 243 Plus 243E Plus 342 Plus THERMAL TRANSFER DIRECT THERMAL BAR CODE PRINTER Service Manual TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Table of Contents 1 FUNDAMENTALS ABOUT THE SYSTEM 1 1 1 Features of the TTP 243 Series cii Sen eae ial tre are 1 1 2 Model Naming SY Ex es Otel So oS toS cre e edat tied 1 13 c vetus S cuero ER Ce Pe dep cub cape Den DE cepe pe E E Dp uar 2 DAPSONE WIG 5 eie d Aen dete t ege eR tpe dea i deae den d Ru qi d 2 GAN OW odas faute tad addit Du eeu uto tu e EE A udi Pu Ma da ud uou dudit 3 1 4 Basic SpecICatons eee dece Sete ele dee 4 tS Effective Prnt Area Dres cb Dep T pede sed 6 1 6 Available Bar 2 2 2 1 1 6 1 7 Van s Sensors RET 7 2 SUPPLY SPECIFICATIONS rtt en ccena en id epe 9 2 1 Types of Papel e E i e OR ROREM RT Eua 9 ioci ME 9 2 3 Ribbon Sizes and Shapes e Een Ete EE ER Ene ERR d 11 3 ELECTRON 5 ec M 12 o1 Descrnpligli ze ee na EE Db en M MEE 12 3 2 MCU Pin Description
21. c Labe Feed xa N gt gt detection area Black Mark Sensor The black mark sensor locates the position of label by emitting infrared rays onto the black mark at the back of the ticket The sensor is mounted 5 75 mm off the center line of the ticket roll width on the mechanism TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs In case of Ticket The default sensor position is 1 as shown on the figure below To change to the 2 position the customer should notify the manufacturer in advance There can be only One position for the sensor Once the sensor position is agreed upon it can not be changed afterwards Black L the Pr EL Surface Feed Max 30mm 3mm Min Ribbon End Sensor The sensor detects the end portion of the ribbon The ribbon end must be transparent Label End Sensor The sensor detects the end portion of the label Peel off Sensor The sensor detects the backing paper of a label Ribbon encoder The encoder is used to detect if the ribbon is broken TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 2 SUPPLY SPECIFICATIONS 2 1 Types of Paper Two types of media are available for TTP 243 label and ticket In TTP 243 there are two types of sensors for paper gap sensor and black mark sensor Label and ticket can be further classifie
22. d into direct thermal type or thermal transfer type 2 2 Specifications Items Label Paper Width Length Pitch 12 2286 Paper Thickness PAD Paper Weight 240 g m Max Roll Inner roll diameter Max 4 3 110mm Diameter 1 core External roll diameter Max 8 4 214mm Roll Up Method Print surface wound outside as standard Paper Core ID 25 7 0 3 Note 1 The width and thickness quoted above are said of the label plus its backing paper 2 Likewise the approval of label entails that of its backing paper 3 In the peel off mode the minimum pitch is 35mm 4 In the cutter mode it is required the paper be wound outside Otherwise paper jam tends to result 5 In the cutter mode the paper thickness is 0 2 mm at maximum and the paper weight is 100 g m at maximum 6 Paper shape is as shown on next page 7 Tag is 0 2mm in thickness and is less than 100g m in weight TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs PAPER LABEL CORE ROLL ID DIA CAP LENGTH LENGTH ermeny PAPER LENGTH PAPER WIDTH TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 2 3 Ribbon Sizes and Shapes Item Specifications Ribbon shape Spool type Max 110mm Ribbon width Min 40mm TP Max 110mm R
23. different type of ribbon 4 Power indicator light does not illuminate Check the connection of serial port cable 5 On line indicator light does not to illuminate Check the DIP switch setting and reset the printer Check that power cord is properly connected 6 Error indicator remains illuminated Out of paper or out of ribbon Check the DIP switch setting Check the paper core make sure it is installed on the ribbon rewind spindle Press the FEED key The error message will be printed out on the print media or sent out through RS 232 port If there is no problem with direct thermal printing but error occurs in thermal transfer printing Please check the encoder of the DC motor 47 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 5 3 Calibrate the Gap Register Install the label Turn on the printer power while pressing the PAUSE button The printer will calibrate the transparency of the backing paper and adjust the gap register 5 4 Self test Install the label Turn on the printer power while pressing the FEED button the printer will Print head checking pattern Calibrate the label length Print internal settings Initiate self test Enter dump mode 5 5 Ram Clear Press the PAUSE and FEED button simultaneously for more than 3 seconds The printer will clear the memory and reset the printer Be sure to calibrate the gap register
24. e Word Length 7 or 8 data bits 1 or 2 stop bits selectable parity Handshaking XON XOFF and DSR DTR Parallel port Standard parallel interface Input Buffer 60KB m 5 232 Interface Pin Configuration TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Printer Function TTP 243 Plus 243E Plus 342 Plus Bar Code Printer 1 5 Effective Print Area TSC Connecting Your Thermal Printing Needs Fr Label Ticket Length Effective Print Length Label Ticket Width Effective Print Width No Print Area 12mm 2286mm 10mm 2284mm 25mm 103mm 23mm 101mm 1mm 1 6 Available Bar Codes Code 39 Code 93 Code 128 UCC Code 128 Subsets A B and C Codabar Interleaved 2 of 5 EAN 8 EAN 13 EAN 128 UPC A UPC E EAN and UPC with 2 or 5 digits add on UPC Shipping container code Postnet Maxicode PDF 417 DataMatrix TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds 1 7 Various Sensors Feed Gap Sensor The feed gap sensor detects a label gap to locate the starting print position of the next label The sensor is mounted 4 mm off the center line of the main mechanism In case of Label Csensor position sensor position View from the Sige Print Surface ifs
25. e External Mount Use Centronics Interface Power RS 232 Interface itch SUMI DC Power Jack Fig 1 2 Rear view TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 1 4 Basic Specifications Thermal transfer and direct thermal printing High dot density printing 203 dots inch Selectable print speeds at 1 5 2 0 or 3 0 per second Supports parallel and serial interface Maximum media width up to 4 4 114 mm Adjustable label edge guide International character sets Print area TTP 243 Plus 243E Plus 4 09 W x 39 L TTP 342 Plus 4 09 W x 18 L without any file downloaded in the printer memory User selectable bar code ratios and heights Prints on labels or tickets Equipped with black mark sensor Equipped with Real Time Clock 243 Plus only Comes with self peeling function 243 Plus only Buzzer provided to warn of possible errors 243 Plus only Label stock and thermal transfer ribbon are easy to install Internal label print counter Self test and hex dump mode Downloadable fonts from label design software Electronics Communication Specifications m Electrical CPU Hitachi SH2 7040 TPH ROHM 4 KF 2004 GC17B Stepping Motor Mitsumi DC Motor DC24V Memory DRAM 2 Mb Flash 2 Mb Adapter 100 240VAC 10 50 60Hz Regulations CE FCC TUV GS m Communications Interface Serial port RS 232C DB 9 at 2400 4800 9600 or 19200 baud rat
26. e the peel off sensor connector Plug in the cutter connector Insert the right and left side flange of cutter into the slot Right Flange Fig 4 1 Cutter Installation Fasten the cutter from the bottom of the printer with the provided screw Make sure no screws or other parts are left in the printer Reassemble the mechanism and internal label roll mount in the reverse procedures of the removal 31 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 4 2 Print Head Replacement Turn off the printer power Remove the RS 232 cable and power cord Open the top cover Remove the ribbon and label roll Open the print carriage Remove the screw at the top front center of the mechanism as shown PaARWN 5 Fig 4 2 The Print Head Screw 7 Disconnect the print head cable Print Head Cable Key of the Print Head Connector Connector Fig 4 3 Printhead and the Cable 32 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Note The key of connector must be positioned upward Do not touch the elements of the print head Do not disassemble the print head 8 Tidy up the cable so that it does not protrude or interfere with the ribbon 9 Reassemble the removed parts in the reverse order of removal 33 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting
27. eeds 8 Remove the four screws of the internal label roll mount Fig 3 18 Remove screws of the label roll mount 9 Move the mechanism about 5 mm in the label feed direction 10 Take out the internal label roll mount and remove the connector Push Button Connector Fig 3 19 Take out the internal label roll mount and remove the connector 28 TTP 243 Plus 243E Plus 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds Your Thermal Printing Needs 11 Remove the screw of ground wire on the mainboard 12 Remove all connectors on the mainboard JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP11 JP7 JP9 JP12 Connector Description JP1 External button LED connector JP2 Ribbon sensor receiver connector JP3 Cutter and Peel off sensor connector JP4 Black mark sensor connector JP5 Gap ribbon transmit sensor connector JP6 DC motor and encoder connector JP7 TPH head up switch connector JP8 Memory cartridge connector JP9 TPH connector JP12 Stepping motor connector 13 Take out the mechanism 14 Remove the rest three screws on the mainboard 2 Q fe gt EI ninek NJM371702 5 NJM371702 JRC usos JRC 06046 Fig 3 20 Upper Left Upper Right Lower Right Corner Screw 15 Replace the mainboard 16 Reassemble the mechanism and internal label roll mount in the reverse procedures of the removal 29 TT
28. hermal Printing Needs Your Thermal Printing Needs 3 11 Communication Serial amp Parallel Port Circuit He Fig 3 11 Parallel port and RS 232 Circuit The RS 232 Circuit is for use with the externally connected personal computer and keyboard unit JP13 connects to PC serial port through the RS 232 cable RxD is the data receive pin of MCU CTS is the Clear To Send of MCU which sends the signal from the external device TxD is the data output pin of MCU RTS is the Request To Send signal which MCU sends to the external device The parallel port circuit is for use with the externally connected personal computer parallel port through the printer cable When PC s strobe signal comes in the printer responds the busy status until it reads the data from parallel port Printer will respond the error signal to PC when it is in error status 24 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 12 Cutter Drive Circuit Fig 3 12 Cutter Drive Circuit This is the cutter drive circuit The RESET signal is 1 when the printer is turned on EN controls the activation of the cutter The cutter is activated when CUTTER signal is The sensor of cutter sends the Hi Lo signal to MCU through CT SEN
29. ibbon winding width Min 40mm Leading tape Polyester film 335 5mm long End tape Polyester film transparent 250 5mm long Max ribbon OD 467mm Winding method Ink surface to be wound outside Note The maximum length of ribbon depends on its thickness and core outside diameter The formula below defines the correlation between ribbon roll length and ribbon core diameter E D dxz 4t Ribbon length D Max roll diameter d Ribbon core outside diameter t Ribbon thickness where a spindle ribbon ink surface TTP 243 Plus 243E Plus 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 ELECTRONICS 3 1 Circuit Description FBM 0 220 DGND M DGND U6 NMI 2 8 BLOCK lt 3 5 59 7 2 9 5 gt SCH MDO x lt 333 DGND 0 MD2 PCU AD AO MDI PCI AL 7 XD PAO RXDO PC3 A3 XD PAL TXDO 4 TS PA3 RXDI 5 5 18 2 5 6 6 ND PEI2 TIOC4A PC7 A7 BE PE3 TIOCOD DRAKT PCS AS NT PA9 TCLKD IRQ3 PC9 A9 PCIO A10 PDO DO PDI DI PD2 D2 PD3 D3 PD4 D4 PDS DS PCI2 A12 PCI3 PCI4 PCIS AIS PBO AI6 MEMORY BLOCK MEMORY SCH cso PD6 D6 PBI AIT cso PD7 D7 PB6 IRQ4 A18 BACK D 0 15 CS
30. n label is detected by the peel off sensor the measured voltage should be 0 2 When label is not detected by the peel off sensor the measured voltage should 5 The peel off sensor is normal if the checking complies with the two cases above else the peel off sensor is out of order 50 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Keds 5 8 Cleaning the Print Head The printer should be cleaned regularly to retain high quality and optimum performance The greater the usage of the printer the more frequent the cleaning 1 Always turn off the printer before cleaning the print head Allow the printhead to cool for a minimum of one minute 2 Open the printer cover 3 Open the printer carriage by pulling up the release lever to the left of the front rubber roller 4 Remove the ribbon and label 5 Clean the print head element with a head cleaner pen or use a cotton swab and 100 ethanol to clean the print head surface Note Do not touch printer head by hand If you touch it careless please use ethanol to clean it It s industry alcohol Please do not use regular alcohol which may damage the printer head Print Head Print Head Element Front Rubber Roller Element Head Cleaner Pen 51 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Update History Date Conte
31. nt Editor 2006 4 12 1 Modify to RoHS version Camille 2006 6 26 1 Modify the 4 11 item 1 10 Main board ass y from Camille 98 0180157 10LF 11LF 12LF to 98 0180157 20LF 21LF 22LF 2 Modify the 3 6 read time clock circuit figure 2006 7 24 1 Modify the printer spec Camille 2006 8 2 1 Modify the 4 11 item 5 1 Power adapter from 62 0010021 00LF to 62 0180002 00LF 2006 8 17 1 Modify the 4 11 item 1 10 Main board ass y from Camille 98 0180157 20LF 21LF 22LF to 98 0180157 30LF 31LF 32LF 2006 8 28 1 Add the 4 11 item 5 5 External Ethernet print server Z Camille 2 Add Gap Sensor in the center part no 2006 8 31 1 Modify the 4 11 item 4 2 PCB D ass y from OOLF to 10LF Camille 2007 1 3 1 Modify the 4 11 item 2 5 Screw part no from 31LF to 34LF Camille 2 Modify the 4 11 item 1 12 Screw part no from 31LF to 34L 2007 1 15 1 Modify the 4 11 item 3 6 Screw part no from 37 1403015 32LF to 37 1403512 52LF 2 Add power cord JP part no 3 Add KP 200 Stand Alone Keyboard Display Unit part no 2007 3 1 1 Modify the 4 11 item 1 10 Main board ass y from Camille 98 0180157 30LF 31LF 32LF to 98 0180157 40LF 41LF 42LF 2007 3 9 1 Modify the 4 11 item 5 5 External Ethernet print server C part Camille 2007 4 14 1 Update TSC e mail address Camille 2 Update 5 8 section cleaning the print head 2007 8 1 1 Company information update Camille 200
32. of order C Checking Gap Sensor Do gap calibration first by holding the Pause button and activating the printer power at the same time If the calibration result is OK go on and check the gap sensor Switch the multimeter to the DC gear Connect the black wire to DC GND and the red wire to PIN2 of JP5 Load label on the printer 1 When gap backing paper only is detected between TX and RX of the gap sensor the measured voltage should be 0 Vdc 2 When gap backing paper only is not detected between TX and RX of the gap sensor the measured voltage should be 5 Vdc The gap sensor is normal if the checking complies with the two cases above Or else the gap sensor is out of order 49 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs D Checking Black Line Sensor Switch the multimeter to the DC gear Connect the black wire to DC GND and the red wire to PIN2 of JP4 Load black line label on the printer 1 When black line is detected by the black line sensor the measured voltage should be 5 Vac 2 When black line is not detected by the black line sensor the measured voltage should be 0 Vdc The black line sensor is normal if the checking complies with the two cases above Or else the black line sensor is out of order E Checking Peel Off Sensor Switch the multimeter to the DC gear Connect the black wire to DC GND and the red wire to PING of 1 Whe
33. p Active RESETP 5 ANDTOVF O ANDTOVF use 1890 NO USE IRQ1 NO USE IRQ2 POWER DOWN IRQ3 USB INT IRQ4 NO USE IRQ5 NO USE IRQ6 NO USE IRQ7 NO USE Other define 1 System Crystal is 16 MHz 2 USB Crystal is 48MHz 3 RTC Crystal 32 768KHz 4 MCU mode is mode 1 16 bit space MDO is high MD1 is low 5 Clock mode is PLL ON x 4 MD2 is low MD3 is High TTP 243 Plus 243E Plus 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 3 Reset Circuit VDD OUT CD gt N C 114 0 056u U3I 80945 DGND Fig 3 3 Reset Circuit This is the reset circuit The TS809CXA IC outputs the system reset signal of LOW when the driving voltage is lower than 4 63V Typical U31 NO use 3 4 Memory System 9 AMD9FIGUD or HEADER WN qe 10V ms ROM ROM HL I I2 3 L ILI Ll lll Bi bl c RD J RESET Fig 3 4 FLASH ROMS and DRAM Diagram This is the memory circuit The U8 amp U9 are 2M Byte FLASH ROM and U10 is 2M Byte DRAM 16 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 5 Sensor amp Key d t Fig 3 5 Sensor amp Key JP1 is the connector which connects to the LEDs and Keys The signal of LED is High
34. r Connecting Your Thermal Printing Needs 5 TROUBLE SHOOTING 5 1 Error Messages Syntax Error The command format is incorrect Check user s manual to be sure The serial port setting is incorrect Check DIP switch and reset the printer Out of Range Numeric input is too large to be processed The input string is too long to be stored The size of the text of bar code exceeds that of the label Download Error The format of the downloaded file is incorrect There is not enough memory to store the file Stack Overflow Program contains too complex mathematical expressions Divide into several expressions There is too much nested routine Memory Error Too many variables defined RS 232 Error The serial port setting is incorrect File Not Found Cannot open the file specified Download the file again Type Mismatch Variable type mismatch Gap Not Found Cannot detect label edge Calibrate the backing paper again Clock Access Error Can not read from write to the clock 46 TTP 243 Plus 243E Plus 342 Plus Bar Code Printer 5 2 Trouble Shooting TSC Connecting Your Thermal Printing Needs Problems 1 Ribbon does not advance Solutions Check the printing mode setting and reset the printer 2 Poor print quality Clean the print head Adjust the print density setting 3 Only prints diagonal pattern in the self test Ribbon and paper are incompatible Use a
35. t head System TH Im oou 12 Communication System serial amp parallel port block Sensor amp Key System Motor System stepping motor DC motor and cutter block TTP243 RoHS CONTROL CIRCUIT MAIN BLOCK TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs G Power System The figure below shows the PCB system area Communication Port l l Motor System j Memory l System l 71 l l Print l Q Head l l MEN l l l l l External Cutter RealTime Memory Memory Power Clock System Connector TTP 243 Plus 243E Plus 342 Plus Bar Code Printer 3 2 MCU Pin Description TSC Connecting Your Thermal Printing Needs Port I O Initial High Low Function Instruction PAO Pull Up RXDO RXD for RS232 PA1 O TXDO TXD for RS232 PA2 Pull Up PA2 RTS for RS232 PAS3 O PA3 CTS for RS232 PA4 O TXD1 DI for TPH PA5 O SCK1 CLK for TPH PA6 Pull Up Active CS2 CS2 Pull Up Active CS3 CS3 Active IRQ2 Power down PA9 Pull Up Active IRQ3 USB INT PA10 Pull Up Active CSO CS0
36. when the LED is bright otherwise it is low JP2 is the connector of the head open sensor The Head open sensor is a micro switch the voltage is High when the print head open otherwise it is low The signal of the key is LOW when the keys is press otherwise t is HIGH P4 is the connector which connects to the block mark sensor The block mark sensor is a reflect in sensor the block mark sensor signal voltage is HIGH when the block mark is detected otherwise it is LOW JP5 is the connector which connects to the gap sensor and the gap emitter level The gap level is a emitter source intensity control signal signal The gap sensor is a penetrable sensor the gap sensor signal voltage is low when the gap is detected otherwise it is high JP7 is the connector of the HEAD OPEN sensor When the printhead open The HEAD SENS signal is High When the printhead close The HEAD SENS Signal is LOW TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs Your Thermal Printing Needs 3 6 Real Time Clock Circuit Fig 3 6 Real Time Clock Circuit HT1381 is serial time Keeper 18 TTP 243 Plus 243E Plus 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 3 7 Decode Circuit CT3 10uF 10 8 OTHER EN 74AHCI32 U30D 11 CENTRONIC DATA 74AHCT32 U2 DGND L 20 6 OTHE
37. with blank label before printing 5 6 Diagnosis Operation Procedure When the power is turned on without any button pressed self diagnosis is performed automatically to test the available memory If any error occurs during this period the ERR light will flash Do the self test and inspect the test pattern to check if the thermal head is available 48 TTP 243 Plus 243E Plus TSC 342 Plus Bar Code Printer Connecting Your Thermal Printing Needs 5 7 Testing Sensors A Checking Ribbon Sensor Switch the multimeter to the DC gear Connect the black wire to DC GND and the red wire to PIN2 of JP2 1 When ribbon is detected between TX and RX of the ribbon sensor the measured voltage should be 5 Vdc 2 When ribbon is not detected between TX and RX of the ribbon sensor the measured voltage should be 0 Vdc The ribbon sensor is normal if the checking complies with the two cases above Or else the ribbon sensor is out of order B Checking DC Motor Encoder Sensor Switch the multimeter to the DC gear Connect the black wire to DC GND and the red wire to PIN2 of JP6 1 When gap of the gear box is detected by the DC motor encoder sensor the measured voltage should be 5 Vdc 2 When gap of the gear box is not detected by the DC motor encoder sensor the measured voltage should be 0 Vdc The DC motor encoder sensor is normal if the checking complies with the two cases above Or else the DC motor encoder sensor is out
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