Panasonic KX-TG5431BXS Service Manual Download Page 39

Page: 39 / 130

Cross Reference:

Check Power

(P.40)

Error Message Table

(P.40)

Check Playback

(P.42)

Check Record

(P.41)

Check Battery Charge

(P.42)

Check Link

(P.43)

Check the RF part

(P.44)

Check Handset Transmission

(P.50)

Check Handset Reception

(P.50)

Check Caller ID

(P.50)

Note:

(*1) When a user claims that the unit disconnects a call
right after the greeting message and no incoming
messages can be recorded, this symptom can not be
reappeared with TEL simulator in the service center. In
this case, try

Check Record

(P.41) item (C).

13 TROUBLESHOOTING GUIDE

KX-TG5431BXS / KX-TGA542BXS

Summary of Contents for KX-TG5431BXS

Page 1: ... rights reserved Unauthorized copying and distribution is a violation of law KX TG5431BXS KX TGA542BXS 5 8 GHz Digital Cordless Answering System Silver Version for Asia Middle Near East and Other areas Telephone Equipment ORDER NO KM40505726CE ...

Page 2: ...6 9 5 Listening to Messages 27 9 6 Remote Operation 28 10 TROUBLESHOOTING 31 10 1 General Use 31 10 2 Programmable Settings 31 10 3 Making Answering Calls Intercom 32 10 4 Phonebook 32 10 5 Caller ID 33 10 6 Answering System 34 10 7 Battery Charge 35 10 8 Power Failure 35 11 DISASSEMBLY INSTRUCTIONS 36 11 1 Base Unit 36 11 2 Handset 37 12 ASSEMBLY INSTRUCTIONS 38 12 1 Fix the LCD and the Receiver ...

Page 3: ...6 Reception Signal 90 24 SIGNAL ROUTE 91 25 CPU DATA BASE UNIT 93 25 1 IC501 93 26 CPU DATA HANDSET 94 26 1 IC201 94 27 EXPLANATION OF IC TERMINALS RF PART 95 27 1 IC701 95 27 2 IC801 96 27 3 IC851 97 28 HOW TO REPLACE THE FLAT PACKAGE IC 98 28 1 PREPARATION 98 28 2 FLAT PACKAGE IC REMOVAL PROCEDURE 98 28 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 99 28 4 BRIDGE MODIFICATION PROCEDURE 99 29 CABINET ...

Page 4: ...eful not to heat too long PbF solder will tend to splash if it is heated much higher than its melting point approximately 1100 F 600 C If you must use Pb solder on a PCB manufactured using PbF solder remove as much of the original PbF solder as possible and be sure that any remaining is melted prior to applying the Pb solder When applying PbF solder to double layered boards please check the compon...

Page 5: ... Free Solder is Used Example Handset P C B IC701 IC851 IC801 IC201 1 25 26 50 51 75 76 100 MIC PbF IC241 IC261 Marked Component View Note The location of the PbF mark is subject to change without notice 5 KX TG5431BXS KX TGA542BXS ...

Page 6: ... boxes with aluminum foil 2 Ground the soldering irons 3 Use a conductive mat on worktable 4 Do not grasp IC or LSI pins with bare fingers 3 CAUTION Danger of explosion if battery is incorrectly replaced Replace only with the same or equivalent type recommended by the manufacturer Dispose of used batteries according to the manufacturer s Instructions 6 KX TG5431BXS KX TGA542BXS ...

Page 7: ...or service The battery strength may not be indicated correctly if the battery is disconnected and connected again even after it is fully charged In that case by recharging the battery as mentioned above you will get a correct indication of the battery strength 7 KX TG5431BXS KX TGA542BXS ...

Page 8: ...4 4 Battery Strength 4 5 Battery Replacement 4 6 Battery Performance 8 KX TG5431BXS KX TGA542BXS ...

Page 9: ...5 LOCATION OF CONTROLS 5 1 Base Unit 5 2 Handset 9 KX TG5431BXS KX TGA542BXS ...

Page 10: ...5 2 1 How to Use the Soft Keys Navigator Key 10 KX TG5431BXS KX TGA542BXS ...

Page 11: ...6 DISPLAYS 6 1 Display Items 11 KX TG5431BXS KX TGA542BXS ...

Page 12: ...6 2 Troubleshooting Handset LCD Cross Reference 1 Re registering the Handset P 44 2 Erasing Items in the Phonebook P 22 12 KX TG5431BXS KX TGA542BXS ...

Page 13: ...7 SETTINGS 7 1 Connections 13 KX TG5431BXS KX TGA542BXS ...

Page 14: ...7 2 Connecting an Optional Headset 7 3 Guide to Handset Programming 14 KX TG5431BXS KX TGA542BXS ...

Page 15: ...7 4 Date and Time 15 KX TG5431BXS KX TGA542BXS ...

Page 16: ...7 5 Dialing Mode 7 6 Line Mode 7 7 Flash Button 16 KX TG5431BXS KX TGA542BXS ...

Page 17: ...7 8 Voice Enhancer 7 9 Handset Ringer Tone 17 KX TG5431BXS KX TGA542BXS ...

Page 18: ...7 10 Dial Lock For Service Hint If the current password is forgotten enter 726276642 and you will be able to go to step 4 18 KX TG5431BXS KX TGA542BXS ...

Page 19: ...7 11 Direct Commands Cross Reference Date and Time P 15 Dial Lock P 18 19 KX TG5431BXS KX TGA542BXS ...

Page 20: ...Cross Reference Remote Code P 29 Re registering the Handset P 44 20 KX TG5431BXS KX TGA542BXS ...

Page 21: ...8 OPERATION 8 1 Phonebook 8 1 1 Adding Items to the Phonebook 21 KX TG5431BXS KX TGA542BXS ...

Page 22: ...ne in the Phonebook Note Refer to Adding Items to the Phonebook P 21 8 1 3 Editing Items in the Phonebook Note Refer to Adding Items to the Phonebook P 21 8 1 4 Erasing Items in the Phonebook 22 KX TG5431BXS KX TGA542BXS ...

Page 23: ...8 1 5 Chain Dial 8 2 Caller ID Service 8 2 1 For Call Waiting Service Users 8 2 2 Caller List 23 KX TG5431BXS KX TGA542BXS ...

Page 24: ...8 2 2 1 Storing Caller Information into the Phonebook 8 2 2 2 Erasing Caller Information 8 3 PAUSE Button For PBX Long Distance Service Users 24 KX TG5431BXS KX TGA542BXS ...

Page 25: ...e Important Only 1 person can access the answering system listen to messages record a greeting message etc at a time When callers leave messages the unit records the day and time of each message Make sure the date and time have been set You can select the caller s recording time 9 1 Recording Your Greeting Message 25 KX TG5431BXS KX TGA542BXS ...

Page 26: ...9 2 Turning the Answering System On Off 9 3 Caller s Recording Time 9 4 Message Alert 26 KX TG5431BXS KX TGA542BXS ...

Page 27: ...9 5 Listening to Messages 9 5 1 Listening to Messages Using the Base Unit 27 KX TG5431BXS KX TGA542BXS ...

Page 28: ...9 5 2 Listening to Messages Using the Handset 9 5 3 Answering System Commands 9 6 Remote Operation 28 KX TG5431BXS KX TGA542BXS ...

Page 29: ...9 6 1 Using the Answering System Remotely 9 6 2 Remote Code 29 KX TG5431BXS KX TGA542BXS ...

Page 30: ...9 6 3 Remote Commands 9 6 4 Turning on the Answering System Remotely 30 KX TG5431BXS KX TGA542BXS ...

Page 31: ...essages see Troubleshooting Handset LCD P 12 for the Cause Solution 10 1 General Use Cross Reference 1 Battery Installation P 7 2 Connections P 13 3 Battery Charge P 7 4 Re registering the Handset P 44 10 2 Programmable Settings 31 KX TG5431BXS KX TGA542BXS ...

Page 32: ...0 3 Making Answering Calls Intercom Cross Reference 5 Dialing Mode P 16 6 Dial Lock P 18 7 Connecting an Optional Headset P 14 10 4 Phonebook Cross Reference 8 Dial Lock P 18 32 KX TG5431BXS KX TGA542BXS ...

Page 33: ...10 5 Caller ID Cross Reference 9 Caller ID Service P 23 10 Date and Time P 15 33 KX TG5431BXS KX TGA542BXS ...

Page 34: ...ode P 29 12 Turning the Answering System On Off P 26 13 Caller s Recording Time P 26 14 Listening to Messages Using the Base Unit P 27 15 Message Alert P 26 16 Date and Time P 15 10 6 Answering System 34 KX TG5431BXS KX TGA542BXS ...

Page 35: ...10 7 Battery Charge Cross Reference 17 Battery Charge P 7 18 Battery Replacement P 8 10 8 Power Failure Cross Reference 19 Connections P 13 35 KX TG5431BXS KX TGA542BXS ...

Page 36: ...11 1 Base Unit Shown in Fig To Remove Remove 1 Cabinet Cover Screws 2 6 12 A 4 Main P C Board Tapes Solders and Cable Main P C Board 2 Operational P C Board Tape Screws 2 6 8 B 4 Operational P C Board 36 KX TG5431BXS KX TGA542BXS ...

Page 37: ...11 2 Handset Shown in Fig To Remove Remove 3 Cabinet Cover Screws 2 14 C 2 4 Follow the procedure 5 Main P C Board Tape and Solders Screws 2 9 D 3 Main P C Board 37 KX TG5431BXS KX TGA542BXS ...

Page 38: ...12 ASSEMBLY INSTRUCTIONS 12 1 Fix the LCD and the Receiver Guide to the Main P C Board Handset 38 KX TG5431BXS KX TGA542BXS ...

Page 39: ...t Transmission P 50 Check Handset Reception P 50 Check Caller ID P 50 Note 1 When a user claims that the unit disconnects a call right after the greeting message and no incoming messages can be recorded this symptom can not be reappeared with TEL simulator in the service center In this case try Check Record P 41 item C 13 TROUBLESHOOTING GUIDE 39 KX TG5431BXS KX TGA542BXS ...

Page 40: ... not be done 1 Check the peripheral circuit of Flash Memory visually 2 Confirm that the voltage is added to the power supply pin If no voltage is detected replace the Flash Memory because it might be defect 3 Solder the Flash Memory again E3 E9 When the adjustment data was checked an error was detected The adjustment data may not be written Note Flash Memory is IC601 DSP is IC501 40 KX TG5431BXS K...

Page 41: ...ection To solve this problem try changing the Auto Disconnect activation through the procedures below Auto Disconnect activation PROCEDURE Status Enable 2 sec CPU detect default STOP GREETING CHECK LOCATOR simultaneously Stand by 2 sec No CPU detect STOP GREETING CHECK VOL simultaneously Disable STOP GREETING CHECK VOL simultaneously If the Disable is selected even if the parallel connected teleph...

Page 42: ...Cross Reference Power Supply Circuit P 71 Note Flash Memory is IC601 DSP is IC501 Note Flash Memory is IC601 DSP is IC501 13 4 Check Playback 13 5 Check Battery Charge 42 KX TG5431BXS KX TGA542BXS ...

Page 43: ...Note Flash Memory is IC601 DSP is IC501 1 Refer to Finding out the Defective part P 44 Cross Reference Check the RF part P 44 13 6 Check Link 43 KX TG5431BXS KX TGA542BXS ...

Page 44: ... the Defective part After All the Checkings or Repairing 1 Re register the checked Handset to the checked Base Unit and Regular HS to Regular BU Note 1 HS Handset 2 BU Base Unit 13 7 1 1 Re registering the Handset 44 KX TG5431BXS KX TGA542BXS ...

Page 45: ...13 7 2 RF Check Flowchart Each item 1 6 of RF Check Flowchart corresponds to Check Table for RF part P 46 Please refer to the each item 45 KX TG5431BXS KX TGA542BXS ...

Page 46: ...ar BU 2 Confirm that RSSI of the Regular BU is approximately 2V by Oscilloscope 6 5 RX Sensitivity confirmation Regular HS BU Mode Test Burst Mode 1 HS BU to be checked Mode RX CW Mode 4 1 Place the Regular HS about 15cm away from the BU 2 Confirm that RSSI of the BU is approximately 2V by Oscilloscope 5 1 Place the HS about 15cm away from the Regular BU 2 Confirm that RSSI of the HS is approximat...

Page 47: ... Register Regular HS to BU to be checked 2 Set BU to Test Link mode 3 Set Regular HS to Test Link mode Set TX Power and RX Sensitivity of the BU and Regular HS by CHART1 At distance of about 20m between HS and BU Link OK RX Sensitivity of the BU is OK No Link RX Sensitivity of the BU is NG 1 Register HS to be checked to Regular BU 2 Set Regular BU to Test Link mode 3 Set HS to Test Link mode Set T...

Page 48: ...13 7 5 RF DSP Interface Signal Wave Form Test Burst Mode 48 KX TG5431BXS KX TGA542BXS ...

Page 49: ... Test Burst Mode 49 KX TG5431BXS KX TGA542BXS ...

Page 50: ...e RF part P 44 13 10 Check Caller ID Cross Reference Telephone Line Interface P 74 Calling Line Identification Caller ID P 77 Note Make sure the format of the Caller ID or Call Waiting Caller ID service of the Telephone company that the customer subscribes to It is also recommended to confirm that the customer is really a subscriber of the service 50 KX TG5431BXS KX TGA542BXS ...

Page 51: ...DE 14 1 Test Mode Flow Chart for Base Unit 14 1 1 Test Burst Mode Note 1 LCD displays the Channel number 2 Refer to Check Table for RF part P 46 and RX CW Test Mode P 56 for proper Handset settings 51 KX TG5431BXS KX TGA542BXS ...

Page 52: ...14 1 2 RX CW Test Mode Note 1 LCD displays the Channel number 2 Refer to Check Table for RF part P 46 and Test Burst Mode P 55 for proper Handset settings 52 KX TG5431BXS KX TGA542BXS ...

Page 53: ...Link Mode Note 1 LCD displays the Channel number 2 LCD displays the number of selected power 3 Refer to Check Table for RF part P 46 and Test Link Mode P 57 for proper Handset settings 53 KX TG5431BXS KX TGA542BXS ...

Page 54: ...14 1 4 Adjustment Mode Cross Reference Check and Adjust X501 Base Unit Frequency P 59 Note 1 This is an adjustment value hex 54 KX TG5431BXS KX TGA542BXS ...

Page 55: ...t for Handset 14 2 1 Test Burst Mode Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 46 and RX CW Test Mode P 52 for proper Base Unit settings 55 KX TG5431BXS KX TGA542BXS ...

Page 56: ...2 RX CW Test Mode Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 46 and Test Burst Mode P 51 for proper Base Unit settings 56 KX TG5431BXS KX TGA542BXS ...

Page 57: ... Mode Note 1 LCD displays the Channel number exception default CH00 1ch 2 for factory use only 3 Refer to Check Table for RF part P 46 and Test Link Mode P 53 for proper Base Unit settings 57 KX TG5431BXS KX TGA542BXS ...

Page 58: ...justment Mode Cross Reference 1 Adjust Battery Low Detector Voltage Handset P 59 Note 2 These are the default values 3 These values may not be fixed depending on the battery strength 58 KX TG5431BXS KX TGA542BXS ...

Page 59: ...cking tolerance 100Hz adjust to Adjustment tolelance 30Hz by pressing or key Adjustment Tolerance 13 824MHz 30Hz 5 Press TALK key to write the new frequency factor in EEPROM 6 Turn the power off Then this value is available Cross Reference Adjustment Mode P 58 14 4 Adjust Battery Low Detector Voltage Handset After Handset s DSP IC201 or EEPROM IC241 replacement Re writing Battery Low voltage to EE...

Page 60: ... C503 C680 C663 C381 C342 C332 C331 C307 C304 R300 C421 R421 RST R422 R524 R525 R522 R375 R374 R373 R371 R303 C308 R301 R365 R364 C303 R340 R341 R304 R305 R372 R343 C371 R361 C551 C524 C522 C525 C509C508 R509 R523 R521 C521 C422 C423 R423 R506 80 51 1 30 81 100 50 31 C611 R680 R460 R454 R459 R601 C601 C603 R473 R171 C172 C142 R112 R121 C121 C122 R122 C120 C517 R517 C174 C167 C513 C515 C365 C347 C3...

Page 61: ...317 R243 C209 C243 R226 R225 C225R227 C203 R224 R228 C224 C223 R223 C221 C222 R222 C314 R312 R201 C201 C202 L345 R343 C343 C332 C371 R261 R262 R263 R203 R204 R205 R207 R242 R331 C322 C341 R341 R342 C383 C272R272 C381 C211 L326 D326 L327 D327 D313 D312 D351 L351 L352 D353 TXE X201 Q221 MIC MICM MICP D363 Q243 Q263 Q251 Q261 Q231 RA201 Q341 Q331 Q363 Q362 Q361 CHG1 CHG2 SPP RXI PbF C S I O RECEIVER ...

Page 62: ... 76 5826 590680 13 5770 404840 45 5798 944684 77 5827 484527 14 5771 294732 46 5799 834576 78 5828 374420 15 5772 188580 47 5800 728424 79 5829 268268 16 5773 078473 48 5801 618316 80 5830 158160 17 5773 972320 49 5802 512164 81 5831 052008 18 5774 862213 50 5803 402057 82 5831 941900 19 5775 756060 51 5804 295904 83 5832 835748 20 5776 645953 52 5805 185797 84 5833 725641 21 5777 539801 53 5806 0...

Page 63: ...662 13 5770 402867 45 5798 942710 77 5827 482554 14 5771 296714 46 5799 836558 78 5828 376402 15 5772 186607 47 5800 726451 79 5829 266294 16 5773 080455 48 5801 620298 80 5830 160142 17 5773 970347 49 5802 510191 81 5831 050035 18 5774 864195 50 5803 404039 82 5831 943882 19 5775 754087 51 5804 293931 83 5832 833775 20 5776 647935 52 5805 187779 84 5833 727623 21 5777 537828 53 5806 077671 85 583...

Page 64: ...hone numbers Caller list and etc This operation should not be performed for a usual repair 14 8 1 Base unit Note 1 Telephone line must be connected 14 8 2 Handset Note 1 Be sure to short the battery terminals of the Handset with a lead wire etc for 2 seconds for discharge after removing the battery 64 KX TG5431BXS KX TGA542BXS ...

Page 65: ...in the same frequency The construction of RX TX frequency data is shown below It consists of 4 slots from the Base Unit to the Handset and 4 slots from the Handset to the Base Unit total 8 slots in 10ms By this slot system simultaneous air link and communication between 4 Handsets and the Base Unit can be realized One communication between Handset and the Base Unit is done by one slot from the Bas...

Page 66: ...erform four duplex communications simultaneously In 1 slot 1 25ms the 10ms of voice data is transmitted Each slot makes every frame frequency hop 100hops sec Although each slot UpLink3 and UpLink4 uses different frequency UpLink3 and DownLink3 use the same frequency Handset Link Traffic Bearer A link is established between Base Unit and Handset The state where duplex communication is performed The...

Page 67: ...SP performs TDD TDMA and ADPCM decoding to convert the RXDATA into the voice signal then it is output to the speaker Transmission The voice signal entering from the Handset microphone is led to DSP IC201 The DSP encodes ADPCM and TDD TDMA with FHSS to TXMOD The TXMOD signal is enter to IC701 of RF PART and modulated to 2 4GHz The 2 4GHz signal is up converted to 5 8GHz RF signal by IC801 The RF si...

Page 68: ...16 EXPLANATION OF LINK DATA COMMUNICATION 16 1 Calling 16 2 To Terminate Communication 16 3 Ringing 68 KX TG5431BXS KX TGA542BXS ...

Page 69: ...POUTP SPOUTN MIN INUSE DETECT RECEIVE AMP DCIN IC331 RESET POWER_DOWN VRCCR VCC VCCA VCCPA CHARGE CONTROL CHG_CTL INT_1 V_RF INT_1 5 VCC ANSWER_LED IC601 FLASH MEMORY LCD KEYS IC300 Q300 R131 R132 Q171 Q371 Q372 Q373 RSSI SHCTRL RADIO_EN TX_EN RX_EN LO_EN SYN_DATA SYN_CLK OSC_IN SYN_LE2 TXDATA V_RF VPA SI SO CS CHG_LED MSG_LED COM1 COM2 SEG3 12 KEY1 6 KEYA F RXDATA MIP SYN_LE1 SYN_OUT RX_GAIN OSC ...

Page 70: ...n is performed during Record Play back and Line Monitoring modes of operation When the DTMF data from the Handset is received the DTMF signal is output Synthesized Voice Pre recorded message The DSP implements synthesized Voice utilizing the built in speech detector and a Flash Memory which stored the vocabulary Caller ID and Call Waiting CID demodulation The DSP implements monitor and demodulate ...

Page 71: ...pply Circuit Function The power supply voltage from AC adaptor is converted to the desired voltage of each block Circuit Operation Q300 and IC300 4 0V DCDC Converter IC331 3 3V Regulator 71 KX TG5431BXS KX TGA542BXS ...

Page 72: ...o Trickle charge to prevent from overcharging Q361 and Q362 detect the ON HOOK state Handset is placed on Base Unit Q371 and Q372 control the charge current Q373 sends a signal to the Handset for about 5 seconds soon after the Handset is placed on the Base Unit This signal tells that the Handset is being charged on the Base Unit When the signal is received charged on the Base Unit 72 KX TG5431BXS ...

Page 73: ... Operation When the AC Adaptor is inserted into the unit then the voltage is shifted by IC331 and power is supplied to the DSP The set starts to operate when VCC goes up to 3 0V or more in the circuit voltage diagram Note 1 The initializing time of the DSP chip is 26 6ms under normal conditions 73 KX TG5431BXS KX TGA542BXS ...

Page 74: ... Q141 is open to cut the DC loop current and decrease the ring load When ring voltage appears at the Tip T and Ring R leads When the telephone rings the AC ring voltage is transferred as follows T L101 R111 C111 Q111 DSP pin 3 BELL When the CPU DSP detects a ring signal Q141 turns on thus providing an off hook condition active DC current flow through the circuit Following signal flow is the DC cur...

Page 75: ...eration The voltage of pin 35 of IC501 is monitored If a parallel connected telephone is put into OFF HOOK status the presence absence of a parallel connection is determined when the voltage changes by 0 2V or more When the set detects the parallel connected telephone is OFF HOOK status the line is disconnected You can enable or disable the Auto Disconnect function See Check Record P 41 75 KX TG54...

Page 76: ...by detecting changes in the T R voltage Circuit Operation Parallel connection detection when on hook When on hook Q136 is ON the voltage is monitored at pin 35 of IC501 There is no parallel connection if the voltage is 1 65 V or higher while a parallel connection is deemed to exist if the voltage is lower Parallel connection detection when off hook When off hook Q136 is OFF the voltage is monitore...

Page 77: ...The method is chosen according to the exchange of telephone office This unit is available to receive the data with both methods and displays the received data on LCD FSK Frequency Shift Keying format DTMF format It is the method to send the telephone number of calling party with DTMF to the telephone DTMF is sent before the first bell signal The data is sent in turn first the start code secondly t...

Page 78: ...cuit 2 4GHz 2 4GHz FL811 IC851 5 8GHz Power Amp and V_PA V_RF RADIO_EN SYN_LE2 SYN_CLK SYN_DATA SYN_LE1 OSC_IN TX_EN SYN_OUT TX_DATA RX_DATA RSSI SHCTRL RF_RESET RX_EN RX_GAIN DSP PLL Serial Interface 5 8GHz Converter Circuit IC801 3 4GHz 5 8GHz PA_CONT VCC TXEN REFIN ANT0 RXEN RXGAIN Q871 5 8GHz LNA Circuit Antenna Switch Circuit 5 8GHz FL821 KX TG5431 BLOCK DIAGRAM Base Unit_RF Part KX TG5431BXS...

Page 79: ...it 2 4GHz 2 4GHz FL811 IC851 5 8GHz Power Amp and V_PA V_RF RADIO_EN SYN_LE2 SYN_CLK SYN_DATA SYN_LE1 OSC_IN TX_EN SYN_OUT TX_DATA RX_DATA RSSI SHCTRL RF_RESET RX_EN RX_GAIN DSP PLL Serial Interface 5 8GHz Converter Circuit IC801 3 4GHz 5 8GHz PA_CONT VCC TXEN REFIN RXEN RXGAIN Q871 5 8GHz LNA Circuit Antenna Switch Circuit 5 8GHz FL821 KX TGA542 BLOCK DIAGRAM Handset_RF Part KX TG5431BXS KX TGA54...

Page 80: ...iption RF part includes Transmitter and Receiver functions Digital signals Mainly voice data that come from DSP are modulated and are transmitted On the other hand received signals are demodulated and go out to DSP 80 KX TG5431BXS KX TGA542BXS ...

Page 81: ...se Unit or 3 3V at Handset is supplied to the Power amplifier in 5 8GHz PA circuit IC841 is 3 0V Regulators and IC761 is a 2 5V Regulator They output Vcc_5 8GHz and Vcc_2 4GHz respectively by order of RADIO_EN signal or CON_EN signal V_RF is approximately 4 0V Base Unit or 3 6V Handset 81 KX TG5431BXS KX TGA542BXS ...

Page 82: ...nal goes into the 5 8GHz Converter circuit 2 4GHz RX signal from 5 8GHz Converter circuit is passed through matching circuit and supplied to pin4 of IC701 then demodulated signal RX_DATA comes out from pin 16 At the same time RSSI Received Signal Strength Indicator outputs from the pin 14 Reference clock 13 824MHz from DSP block is supplied to pin 11 of IC701 VCC_2 4G supplies 2 5V regulated volta...

Page 83: ...ircuit is supplied to pin 17 of IC801 and internal TX MIXER multiplies it by 3 4GHz Local signal from internal VCO module and up converts into 5 8GHz TX signal This 5 8GHz TX signal is output from pin 2 and goes into the 5 8GHz PA circuit 5 8GHz RX signal from 5 8GHz LNA circuit supplied to pin 5 of IC801 and internal RX MIXER multiplies it by 3 4GHz Local signal from internal VCO module and down ...

Page 84: ...ircuit This block amplifies receiving 5 8GHz signal 5 8GHz RX signal from Antenna Switch circuit amplified by LNA Low Noise Amplifier Q871 and filtered by HPF FL821 and then supplied to 5 8GHz Converter circuit 84 KX TG5431BXS KX TGA542BXS ...

Page 85: ...includes Switches for High frequency signals and controlled by ANT0 signal and ANT 1 signal from DSP DSP is checking RSSI Received Signal Strength Indicator signal and selects better condition Antenna from two antennas At the TX mode 5 8GHz TX signal from 5 8GHz PA block leads to selected Antenna terminal at the RX mode 5 8GHz RX signal from selected Antenna terminal leads to 5 8GHz LNA circuit Ha...

Page 86: ... CON_EN SYN_LE2 SYN_OUT SYN_DATA SYN_CLK SYN_LE1 RX_GAIN RX_EN TX_EN SHCTRL RF_RESET RSSI WP CLK DATA LCD_LIGHT KEY_LIGHT KEYSTOROBE_A F KEYIN_1 5 Q231 CHARGE DETECT CHARGE Q361 Q221 Q362 Q363 CHARGE CONTROL RESET POWER DOWN REGULATOR MIC SP Headset Jack CN331 Q331 LED261 HEADSET DETECT Monitor SP 3 3V REGULATOR LCD KEYS RF part ANT X201 13 824MHz EEPROM BATTERY Q341 OSC AMP OSC IN PA_CONT TX_DATA...

Page 87: ... circuit Ringer Generation Interface circuit RF part Speaker Mic LED Key scan LCD Headset Initialize Note 1 The initializing time of the DSP chip is 20ms under normal conditions 23 1 2 RF part Mainly voice signal is modulated to RF or it goes the other way 23 1 3 EEPROM IC241 All setting data is stored ex ID code user setting Phonebook Caller ID data 87 KX TG5431BXS KX TGA542BXS ...

Page 88: ...tely to each block BATTERY 3 6V KEY BACK LIGHT RF part REG 3 3V IC381 DSP LCD IC201 EEPROM IC241 MIC CIRCUIT 3 6V 3 0VD V RF V PA REG 3 0V IC371 Block Diagram Handset Power LEDS 3 0VA BATT BATT RA371 CHARGE2 Q361 CHARGE1 D353 88 KX TG5431BXS KX TGA542BXS ...

Page 89: ...GE and CHARGE flows R231 Q231 pin80 of IC201 where the charge is detected Then IC201 calculates the battery consumption amount from the previous charge and it controls Q361 Q362 Q363 by pin82 of IC201 until charging is complete When charging is complete the control pattern is switched to Trickle charging form from Operational charging form 23 4 Ringer and Handset SP Phone 89 KX TG5431BXS KX TGA542...

Page 90: ...wer for the microphone is supplied from DSP 20 and the power is turned OFF on standby 23 6 Reception Signal The voice signal from the Base Unit is output to DSP 33 HSSPOUT This signal is led to the headset jack CN331 The signal through the headset jack and the other signal output from DSP 34 drives the speaker When the headset is inserted to the jack the voice signal is cut at the jack so the soun...

Page 91: ...24 SIGNAL ROUTE Each signal route is as follows 91 KX TG5431BXS KX TGA542BXS ...

Page 92: ...Each signal route is as follows RF part signal route 92 KX TG5431BXS KX TGA542BXS ...

Page 93: ...set D I Normal Reset 55 Power Down D I Normal Power Down 56 FLASH_RST High Middle Low 57 TX_OUT D O High Low 58 PA_CONT D O Low Power High Power 59 FLASH_SO High Middle Low 60 FLASH_SI High Middle Low 61 FLASH_CS High Middle Low PIN Description I O High High_Z Low 62 BMCCLK D O High Low 63 RXEN D O Active Off 64 TXEN D O Active Off 65 RXGAIN D O High Low 66 RXI D I High Low 67 CHG_LED D I O Off On...

Page 94: ...C VCC 51 XOUT A O 52 XIN A I 53 GND GND GND 54 RESET D I Normal Reset 55 PDN D I Power On Power Down 56 FLASH_ RESET D O Normal 57 TX OUT D O High Low 58 PA_CONT D O High Low 59 FLASH_SO D O Normal PIN Description I O High High_Z Low 60 FLASH_SI D O High Low 61 FLASH_CS D O Normal 62 BMCCLK D O 63 RXEN D O Active Off 64 TXEN D O Active Off 65 RXGAIN D O High Low 66 RXI D I High Low 67 OSC_BUF D O ...

Page 95: ...27 EXPLANATION OF IC TERMINALS RF PART 27 1 IC701 95 KX TG5431BXS KX TGA542BXS ...

Page 96: ...27 2 IC801 Backside Terminal GND 96 KX TG5431BXS KX TGA542BXS ...

Page 97: ...27 3 IC851 Backside Terminal GND 97 KX TG5431BXS KX TGA542BXS ...

Page 98: ...pecific Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free P 4 28 2 FLAT PACKAGE IC REMOVAL PROCEDURE 1 Put plenty of solder on the IC pins so that the pins can be completely covered Note If the IC pins are not soldered enough you may give pressure to the P C board when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and...

Page 99: ...the corresponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 28 4 BRIDGE MODIFICATION PROCEDURE 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below 99 KX TG5431BXS KX TGA542BXS ...

Page 100: ...29 CABINET AND ELECTRICAL PARTS BASE UNIT 100 KX TG5431BXS KX TGA542BXS ...

Page 101: ...30 CABINET AND ELECTRICAL PARTS HANDSET 101 KX TG5431BXS KX TGA542BXS ...

Page 102: ...31 ACCESSORIES AND PACKING MATERIALS 31 1 KX TG5431BXS 102 KX TG5431BXS KX TGA542BXS ...

Page 103: ...32 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 32 1 Base Unit 32 2 Handset 103 KX TG5431BXS KX TGA542BXS ...

Page 104: ...S HB 13 PQHR11094Z GUIDE MESSAGE BUTTON ABS HB 14 PQHR11095Z OPTIC CONDUCTIVE PARTS LED LENDS ANSWER ON PS HB 15 PQHR11096Z OPTIC CONDUCTIVE PARTS LED LENDS CHARGE PS HB 16 PQSX10283X KEYBOARD SWITCH 17 PQMG10025Z RUBBER PARTS MIC 18 PQYF10603Y1 CABINET COVER PS HB 19 PQGT17950Z NAME PLATE 33 1 2 Main P C Board Parts Note 1 When you have replaced IC501 or IC601 adjust X501 Refer to Check and Adjus...

Page 105: ...453 ERJ2GEJ222 2 2K R454 ERJ2GEJ222 2 2K R459 ERJ2GEJ222 2 2K R460 ERJ2GEJ222 2 2K R473 ERJ2GEJ1R0 1 Ref No Part No Part Name Description Remarks R474 ERJ2GEJ1R0 1 R506 ERJ2GEJ121 120 R521 ERJ2GEJ182 1 8K R522 ERJ2GEJ151 150 R523 ERJ2GEJ393X 39K R524 ERJ2GEJ561 560 R525 ERJ2GEJ681 680 R533 ERJ2GEJ472X 4 7K R535 ERJ2GEJ102 1K R536 ERJ2GEJ222 2 2K R673 ERJ2GEJ821 820 R675 ERJ2GEJ821 820 R679 ERJ2GEJ...

Page 106: ...01 Ref No Part No Part Name Description Remarks C804 ECJ0EC1H150J 15P C806 ECJ0EC1H100D 10P C809 ECJ0EB1H102K 0 001 C811 ECJ0EC1H020C 2P C821 ECJ0EC1H100D 10P C827 ECJ0EC1H050C 5P C832 ECJ0EC1H221J 220P C833 ECJ0EC1H101J 100P C834 ECJ0EB1C103K 0 01 C835 ECJ0EB1H471K 470P C836 ECUV1A105KBV 1 C837 ECJ0EC1H101J 100P C842 ECUV1A105KBV 1 C843 ECUV1A474KBV 0 47 C844 ECJ0EC1H020C 2P C851 ECJ0EC1H101J 100...

Page 107: ...3 B0JCMD000010 DIODE SI S D354 B0JCMD000010 DIODE SI S D363 MA132WK DIODE SI S LED251 B3ACB0000133 LED LED252 B3ACB0000133 LED LED253 B3ACB0000133 LED LED254 B3ACB0000133 LED LED255 B3ACB0000133 LED LED256 B3ACB0000133 LED LED257 B3ACB0000133 LED LED261 B3AZB0000032 LED Ref No Part No Part Name Description Remarks COILS L331 PQLQR2KB113T COIL S L332 PQLQR2KB113T COIL S L334 PQLQR2KB113T COIL S L71...

Page 108: ...1 C737 ECJ0EB1H102K 0 001 C741 ECJ0EB1H222K 0 0022 C743 ECJ0EC1H221J 220P C745 ECJ0EC1H101J 100P C746 ECJ0EC1H101J 100P C747 ECJ0EC1H100D 10P C748 ECJ0EC1H101J 100P Ref No Part No Part Name Description Remarks C749 ECJ0EC1H101J 100P C750 ECJ0EC1H101J 100P C751 ECJ0EC1H100D 10P C752 ECJ0EB1H471K 470P C763 ECUV1A474KBV 0 47 C764 ECJ0EC1H020C 2P C773 ECJ0EC1H101J 100P C781 F1G1A1040006 0 1 C782 ECJ0E...

Page 109: ... voltage line 2 This schematic diagram may be modified at any time with the development of new technology 34 2 Handset SCHEMATIC DIAGRAM HANDSET_MAIN Notes 1 DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams and circuit board may be modified at any time with the development of new technology 109 KX TG5431BXS KX TGA542BXS ...

Page 110: ...0 01 C551 C522 K0 1 100K RA500 2 4 6 8 7 5 3 1 C365 K0 01 C524 K0 1 RA501 4 7K 7 5 3 1 2 4 6 8 C677 NC C679 NC C675 NC KIN1 GND KIN2 TAM CDL SPP C471 NC SPN 5 1V D471 C472 NC 5 1V D472 R473 1 R474 1 C458 K0 022 2 2K R460 C457 K0 022 2 2K R459 V_RF VPA R668 NC R670 NC R672 NC R669 NC R671 NC C459 K0 015 GND C680 NC C681 NC R680 NC R681 NC S661 to Operational P C B NC 4 3 2 1 KEYS_D KEYS_C KEYS_B KE...

Page 111: ...R175 560 R160 NC R168 0 NC C160 NC R156 NC Q156 NC R157 R133 NC C331 K0 47 NC SA102 SA101 NC D111 NC R110 10u 6 3V C373 NC R151 NC D131 REG_3 3V 1 NC 2 RESET 3 VDET 4 VIN 5 VOUT 6 NC 7 GND 8 Cd Q142 47K R342 12K R340 Q340 1K R341 R343 NC NC Q143 CN301 DC JACK 1 DC 2 DC R176 100 22u 6 3V C176 C166 10u 16V C303 K0 01 10u 25V C161 Q141 C341 330u 6 3V NC C110 NC D110 R308 120 R303 220 C306 100u 25V R3...

Page 112: ...2 K470P C835 R834 3 3K R832 5 6K R873 120 C827 C5P R872 47K C876 C1P NC L826 L873 2 2nH K1000P C854 K1000P C809 R809 22K J22P C802 J15P C804 C807 NC NC R808 C890 J100P C895 J100P C871 C1P C8741 5nH C857 C0 5P C2P C811 D10P C821 C852 K0 01 IC851 1 VCC2 2 VCC3 3 GND 4 GND 5 PAOUT 6 TX 7 SW1 8 SW2 9 ANT1 10 GND 11 GND 12 ANT2 13 SW3 14 SW4 15 RX 16 GND 17 PACTL 18 GND 19 PAIN 20 GN D 21 VCC0 22 GN D ...

Page 113: ...MOD 28 SYN_CLK 29 SYN_EN 30 SYN_DATA 31 SYN_OUT 32 VCC_PA TX_DATA D10P C747 K1000P C734 SHCTRL OSC_IN K1000P C714 NC C703 330 R742 K1000P C737 1uH 1005 L782 NC C766 RADIO_EN C701 4 7uF 2125 SYN_CLK K470P C752 TX_EN RF_RESET J120P C782 NC C742 1K R744 GND RX_GAIN J100P C833 IC761 2 5V_REG 1 VIN 2 VSS 3 CE 4 NC 5 VOUT 1K R752 C763 K0 47 1608 C2P C844 ANT0 PA_CONT CON_EN NC C769 NC C768 NC C859 NC C8...

Page 114: ...2 KEYS_A 3 KEYS_B 4 KEYS_C 5 KEYS_D 6 KEYS_E 7 KEYS_F 8 KEYIN6 9 KEYIN5 10 KEYIN4 11 KEYIN3 12 KEYIN2 13 KEYIN1 14 INT_LED 15 CHG_LED 16 INUSE_LED 17 ANS_LED 18 MSG_LED 19 2APVCC 20 COM1 21 COM2 22 SEG3 23 SEG4 24 SEG5 25 SEG6 26 SEG7 27 SEG8 28 SEG9 29 SEG10 30 SEG11 31 SEG12 32 NC ANS2 MSG2 KS_C KIN3 KX TG5431 SCHEMATIC DIAGRAM Base Unit_Operation 114 KX TG5431BXS KX TGA542BXS ...

Page 115: ...Memo 115 KX TG5431BXS KX TGA542BXS ...

Page 116: ...383 TXO C246 K0 1 K0 47 C272 CA271 K0 47 4 1 2 3 820K 1 R273 K0 1 C273 CA274 K0 1 1 3 4 2 5 7 8 6 430K 1 R272 CN271 22 RESETB 21 VSS 20 CAP1 19 CAP1 18 CAP2 17 CAP2 16 VOUT 15 VR 14 V0 13 V1 12 V2 11 V3 10 V4 9 VDD 8 DB4 7 DB5 6 DB6 5 DB7 4 CSB 3 E_RD 2 RW_WR 1 RS SP TALK BACK UP DOWN OFF MUTE MENU NEXT HOLD FLASH RIGHT LEFT LED256 NC C262 R261 47 NC C261 NC 1 VIN 2 C 3 C 4 ON OFF 5 GND 6 VOUT NC ...

Page 117: ... 21 UART_TX 22 UART_RX 23 SERIAL_DATA 24 SERIAL_LE 25 SERIAL_CLK 26 26 SERIAL_DI 27 27 ANT_LED3 28 GND 29 SPOUTP 30 GNDPA 31 SPOUTN 32 VCCPA 33 HSSPOUT 34 LOUT0 35 DCIN0 36 LIN0 37 VCCA 38 GNDA 39 HSMIP 40 HSMIN 41 VREF 42 MIN 43 MIP 44 GNDR 45 TXMOD 46 VREFR 47 RSSI 48 VCCR 49 GNDPLL 50 VCCPLL 51 XOUT 52 XIN 53 GND 54 RESET 55 PDN 56 FLASH_RESET 57 TXO 58 PA_CONT 59 FLASH_SO 60 FLASH_SI 61 FLASH_...

Page 118: ...C832 K470P C835 R834 3 3K R832 5 6K R873 120 C827 C5P R872 47K C876 C1P NC L826 L873 2 2nH K1000P C854 K1000P C809 R809 22K J22P C802 J15P C804 C807 NC NC R808 C856 K1000P C871 C1P C874 1 5nH C857 C0 5P C2P C811 D10P C821 C852 K0 01 IC851 1 VCC2 2 VCC3 3 GND 4 GND 5 PAOUT 6 TX 7 SW1 8 SW2 9 ANT1 10 GND 11 GND 12 ANT2 13 SW3 14 SW4 15 RX 16 GND 17 PACTL 18 GND 19 PAIN 20 GND 21 VCC0 22 GND 23 GND 2...

Page 119: ..._PLL2A RXGAIN PA_RAMP TXMOD SYN_CLK SYN_EN SYN_DATA SYN_OUT VCC_PA TX_DATA D10P C747 K1000P C734 SHCTRL OSC_IN K1000P C714 NC C703 330 R742 K1000P C737 NC C766 RADIO_EN C701 4 7uF 2125 SYN_CLK K470P C752 TX_EN RF_RESET J120P C782 NC C742 1K R744 GND RX_GAIN J100P C833 IC761 2 5V_REG 1 NVI 2 VSS 3 CE 4 NC 5 VOUT 1K R752 C763 K0 47 1608 C2P C844 PA_CONT CON_EN NC C769 NC C768 NC C859 NC C858 NC L860...

Page 120: ...Memo 120 KX TG5431BXS KX TGA542BXS ...

Page 121: ...C612 R682 R594 C681 C686 C685 C682 C504 C684 C683 C687 C503 C680 C663 C381 C342 C332 C331 C307 C304 R300 C421 R421 RST R422 R524 R525 R522 R375 R374 R373 R371 R303 C308 R301 R365 R364 C303 R340 R341 R304 R305 R372 R343 C371 R361 C551 C524 C522 C525 C509C508 R509 R523 R521 C521 C422 C423 R423 R506 80 51 1 30 81 100 50 31 C611 R680 R460 R454 R459 R601 C601 C603 R473 R171 C172 C142 R112 R121 C121 C12...

Page 122: ...P11294Z KIN4 RXI GND DVCC VCC BCK SPN CP CM DCM2 DCM DCP DCP2 L1R L1T MIC MIC MIP MIN JC JG URX UTX RED INUSE KI2 CHG KS_D KSC KI1 2APVCC JS R Y G B JI JO A KX TG5431 CIRCUIT BOARD Base Unit_Main Flow Solder Side View KX TG5431BXS KX TGA542BXS 122 ...

Page 123: ... 41 1 Component View REC CHK ERASE ANS2 LED907 LED904 LED901 KS_C KIN3 ANS RPT SKIP MSG MSG2 STOP CN901 1 32 DOWN 1 2 1 12 L5DC01 PbF UP KX TG5431 CIRCUIT BOARD Base Unit_Operation Component View PQUP11298Z A KX TG5431BXS KX TGA542BXS 123 ...

Page 124: ...41 2 Flow Solder Side View 1 A 12 L5DC01 PbF PQUP11298Z KX TG5431 CIRCUIT BOARD Base Unit_Operation Flow Solder Side View KX TG5431BXS KX TGA542BXS 124 ...

Page 125: ...8 C837 C743 C742 C731 C732 C706 C705 C722 C723 L715 C712 L724 C725 R724 C717 C716 C714 L711 C711 C713 C804 R732 R752 R751 C750 C752 C751 C749 C747 R747 C748 C708 C707 C762 R733 C733 C734 C745 C746 C737 C736 R735 C735 C833 C773 R834 C835 R832 C832 C807 C802 C821 C811 C801 C874 C895 C890 C891 C896 C871 C872 C873 R872 R873 C876 C875 R856 C856 C854 C852 C857 L822 L826 L874 L873 L871 C827 C806 C851 FL8...

Page 126: ...Memo KX TG5431BXS KX TGA542BXS 126 ...

Page 127: ...R333 C305 R368 R367 R366 C306 RA317 C377 C333 C215 R209 R241 C241 R317 R243 C209 C243 R226 R225 C225 R227 C203 R224 R228 C224 C223 R223 C221 C222 R222 C314 R312 R201 C201 C202 L345 R343 C343 C332 C371 R261 R262 R263 R203 R204 R205 R207 R242 R331 C322 C341 R341 R342 C383 C272R272 C381 C211 L326 D326 L327 D327 D313 D312 D351 L351 L352 D353 TXE X201 Q221 MIC MICM MICP D363 Q243 Q263 Q251 Q261 Q231 RA...

Page 128: ...OFF UP LEFT BACK NEXT SP MUTE DOWN MENU 1 2 3 4 5 6 7 8 LED253 LED251 LED254 9 0 MIC HOLD FLASH RIGHT LED252 PbF LED255 LED256 22 1 A LED257 KX TGA542 CIRCUIT BOARD Handset_Main Flow Solder Side View PQUP11290Z KX TG5431BXS KX TGA542BXS 128 ...

Page 129: ...C837 C743 C742 C731 C732 C706 C705 C722 C723 L715 C712 L724 C725 R724 C717 C716 C714 L711 C711 C713 C804 R732 R752 R751 C750 C752 C751 C749 C747 R747 C748 C708 C707 C762 R733 C733 C734 C745 C746 C737 C736 R735 C735 C833 C773 R834 C835 R832 C832 C807 C802 C821 C811 C801 C874 C895 C890 C891 C896 C871 C872 C873 R872 R873 C876 C875 R856 C856 C854 C852 C857 L822 L826 L874 L873 L871 C827 C806 C851 FL811...

Page 130: ...130 KX TG5431BXS KX TGA542BXS G N KXTG5431BXS KXTGA542BXS ...

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