Panasonic KX-TGA740 Service Manual Download Page 75

Page: 75 / 102

KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB

14 Schematic Diagram

14.1. For Schematic Diagram

14.1.1. Base Unit (Schematic Diagram (Base Unit_Main))

Notes:

1. DC voltage measurements are taken with voltmeter from the negative voltage line.

2. The schematic diagrams may be modified at any time with the development of new technology.

14.1.2. 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 may be modified at any time with the development of new technology.

14.1.3. Charger Unit (Schematic Diagram (Charger Unit))

Notes:

1. DC voltage measurements are taken with voltmeter from the negative voltage line.

2. The schematic diagrams may be modified at any time with the development of new technology.

Summary of Contents for KX-TGA740

Page 1: ...ns Co Ltd 2009 Unauthorized copying and distribution is a violation of law ORDER NO KM40905922CE Telephone Equipment Model No KX TG7411MEB KX TG7412MEB KX TGA740MEB Expandable Digital Cordless Phone B Black Version for Mexico ...

Page 2: ...2 KX TG7411MEB KX TG7412MEB KX TGA740MEB ...

Page 3: ...1 Disassembly Instructions 57 11 2 How to Replace the Handset LCD 60 12 Measurements and Adjustments 62 12 1 Things to Do after Replacing IC or X tal 62 12 2 Base Unit Reference Drawing 63 12 3 Handset Reference Drawing 64 12 4 Frequency Table 65 13 Miscellaneous 66 13 1 CPU Data Base Unit 66 13 2 CPU Data Handset 67 13 3 Explanation of IC Terminals RF Part 68 13 4 How to Replace the Flat Package ...

Page 4: ...mmended by the manufacturer 3 Dispose of used batteries according to the manufacturer s Instructions 2 2 About Lead Free Solder PbF Pb free Note In the information below Pb the symbol for lead in the periodic table of elements will refer to standard solder or solder that con tains lead We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from ...

Page 5: ...nc and Bismuth Sn Zn Bi Please check the manufac turer s specific instructions for the melting points of their products and any precautions for using their product with other materi als The following lead free PbF solder wire sizes are recommended for service of this product 0 3 mm 0 6 mm and 1 0 mm 2 3 Discarding of P C Board When discarding P C Board delete all personal information such as telep...

Page 6: ...A740MEB 3 Specifications Note Design and specifications are subject to change without notice Note for Service Operation range Up to 300 m outdoors Up to 50 m indoors depending on the condition Analog telephone connection Telephone Line ...

Page 7: ...ms of voice data is transmitted 2 Handsets Link Traffic Bearer A link is established between base unit and handset The state where duplex communication is performed Handset doesn t make up duplex in no free RF channels because of interference 1 Dummy Bearer Base unit sends Dummy data to the all stand by state handsets Handsets receive that data for synchronization and monitoring request from the b...

Page 8: ...l in the selected antenna and demodulates it to digital data RXDATA DSP IC501 converts RXDATA into a voice signal and outputs it to speaker Transmission A voice signal from microphone is encoded to digital data TXDATA by DSP IC501 in a handset Then TXDATA goes to RF PART and it s modulated to 1 9 GHz The RF signal is amplified and fed to a selected antenna As for a base unit RF RF signal is receiv...

Page 9: ...Q141 BELL DETECT RLY BELL Q111 LIN LOUT RF_PART CID_IN CID_IN IC501 DSP INUSE DETECT 2 INUSE DETECT 1 RECEIVE AMP DCIN 1 DCIN 2 IC331 RESET POWER_DOWN VCCIN VCC VCCA VCCPA INT_1 V_RF INT_1 5 VCC IC611 EEPROM R151 R152 R131 R133 Q171 V_PA DVCC SI SO CS 3 3 V REGULATOR IC321 3 0 V REGULATOR with RESET CLK RST R371 R372 R373 R374 KEY 1 KEY_C SW662 SYN_OUT BCLK SYN_EN SYN_CLK SYN_DATA SLOT_CTROL RADIO...

Page 10: ...C Note 1 Antenna Type wired dipole antenna KX TG7411 7412 BLOCK DIAGRAM Base Unit_RF Part PLL 13 824 MHz IC701 ANT1 1 ANT2 1 Control Logic Mixer A D Demodulator delta sigma Modulator D781 D771 BCLK SYN_OUT SYN_EN SYN_CLK SYN_DATA SLOT_CTROL RADIO_EN TXDATA RXDATA RF_RSTN Divider 1 5 DSP IC501 ...

Page 11: ...Processing IC501 DTMF Generator When the DTMF data from the handset is received the DTMF signal is output Caller ID demodulation The DSP implements monitor and demodulate the FSK DTMF signals that provide CID information from the Central Office Digital Switching The voice signal from telephone line is transmitted to the handset or the voice signal from the handset is transmitted to the Tele phone ...

Page 12: ...B KX TG7412MEB KX TGA740MEB 4 4 3 Power Supply Circuit Function The power supply voltage from AC adaptor is converted to the desired voltage of each block Circuit Operation IC321 3 0 V Regulator IC331 3 3 V Regulator ...

Page 13: ...13 KX TG7411MEB KX TG7412MEB KX TGA740MEB 4 4 3 1 Charge Circuit The voltage from the AC adaptor is supplied to the charge circuits ...

Page 14: ...t incorporates an AC adaptor Circuit 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 0 V or more in the circuit voltage diagram Note 1 The initializing time of the DSP chip is 28 ms under normal conditions ...

Page 15: ...111 DSP pin 58 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 current flow T L101 D101 Q141 Q161 R163 R167 D101 L102 P101 R ON HOOK Circuit Q141 is open Q141 is connected as to cut the DC loop current and to cut the voice signal The unit is consequently in an on hook condition...

Page 16: ...e con nected in parallel is on hook or off hook by detecting changes in the T R voltage Circuit Operation Parallel connection detection when on hook When on hook the voltage is monitored at pin 86 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 hoo...

Page 17: ...lephone using either method of FSK or DTMF 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 sig nal The data is ...

Page 18: ..._1 5 Q531 CHARGE DETECT CHARGE Q361 D361 Q362 Q364 CHARGE CONTROL RST IC561 DC DC CONVERTER REGULATOR 2 7 V IC741 REGULATOR MIC SP Headset Jack CN431 R436 R437 LED561 HEADSET DETECT Monitor SP LCD KEYS RF part ANT1 ANT2 X501 13 824 MHz EEPROM BATTERY Q561 LCD BACK LIGHT RST BELL IC372 DC DC CONVERTER IC373 DC DC CONVERTER SYN_OUT SYN_EN SYN_CLK SYN_DATA SLOT_CTROL RADIO_EN TXDATA RXDATA RF_RSTN RF...

Page 19: ...nit and handset in Radio parts ANT1 patterned antenna KX TGA740 BLOCK DIAGRAM Handset_RF Part ANT2 wired dipole antenna PLL 13 824 MHz IC701 ANT1 1 ANT2 1 Control Logic Mixer A D Demodulator D781 D771 BCLK SYN_OUT SYN_EN SYN_CLK SYN_DATA SLOT_CTROL RADIO_EN TXDATA RXDATA RF_RSTN Note delta sigma Modulator DSP IC501 Divider 1 5 ...

Page 20: ...DSP IC501 Function Battery Low Power down detect circuit Ringer Generation Interface circuit RF part Speaker Mic LED Key scan LCD Headset Initial waves Note 1 The initializing time of the DSP chip is 20 ms under normal conditions 4 7 1 2 RF part Mainly voice signal is modulated to RF or it goes the other way 4 7 1 3 EEPROM IC541 Setting data is stored ex ID code user setting ...

Page 21: ...21 KX TG7411MEB KX TG7412MEB KX TGA740MEB 4 7 2 Power Supply Circuit Voltage is supplied separately to each block ...

Page 22: ...1 The voltage between CHARGE and CHARGE flows Q531 pin 38 of IC501 where the charge is detected Then IC501 calculates the battery consumption amount from the previous charge and it controls Q361 Q362 Q364 by pin 42 of IC501 until charging is complete When charging is complete the control pattern is switched to Trickle charging form from Operational charging form Charging form 4 7 4 Ringer and Hand...

Page 23: ...the headset is input to DSP 95 Also the power for the microphone is supplied from DSP 92 and the power is turned OFF on standby 4 7 6 Reception Signal The voice signal from the base unit is output to DSP 98 This signal is led to the headset jack CN431 The signal through the headset jack and the other signal output from DSP 97 drives the speaker When the headset is inserted to the jack the voice si...

Page 24: ...ice data that come from DSP are modulated and are transmitted On the other hand received signals are demodulated and go out to DSP 4 8 1 Antenna switch Circuit IC701 controls D771 by TRSW TRSW_n signals and carries out the switching of TX mode RX mode In the same way IC701 con trols D781 by ANT ANT_n signals and carries out the switching of Antenna1 ANT1 Antenna2 ANT2 ...

Page 25: ...ed to the charge circuits Main charge 220 280 mA at the Battery of maximum 7 hours is started soon after the handset is placed on the charger unit Then it changes to Trickle charge to prevent from over charging Charging form The route for this is as follows DC pin of J1 F1 R1 CHARGE pad Handset CHARGE pad DC pin of J1 ...

Page 26: ...26 KX TG7411MEB KX TG7412MEB KX TGA740MEB 4 10 Signal Route RF part signal route ...

Page 27: ...27 KX TG7411MEB KX TG7412MEB KX TGA740MEB 5 Location of Controls and Components 5 1 Controls 5 1 1 Base Unit 5 1 2 Handset ...

Page 28: ...28 KX TG7411MEB KX TG7412MEB KX TGA740MEB 5 2 Display ...

Page 29: ...attery Installation 6 2 2 Battery Charge Note for 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 ...

Page 30: ...30 KX TG7411MEB KX TG7412MEB KX TGA740MEB 6 2 3 Battery Level 6 2 4 Panasonic Ni MH Battery Perfor mance supplied batteries ...

Page 31: ...31 KX TG7411MEB KX TG7412MEB KX TGA740MEB 7 Operating Instructions 7 1 Programmable Settings 7 1 1 Programming by Scrolling through the Display Menus ...

Page 32: ...32 KX TG7411MEB KX TG7412MEB KX TGA740MEB ...

Page 33: ...33 KX TG7411MEB KX TG7412MEB KX TGA740MEB 7 1 2 Programming using the Direct Commands ...

Page 34: ...34 KX TG7411MEB KX TG7412MEB KX TGA740MEB 7 2 Error Messages ...

Page 35: ...35 KX TG7411MEB KX TG7412MEB KX TGA740MEB 7 3 Troubleshooting ...

Page 36: ...36 KX TG7411MEB KX TG7412MEB KX TGA740MEB ...

Page 37: ...37 KX TG7411MEB KX TG7412MEB KX TGA740MEB ...

Page 38: ...st Mode 8 1 Adjustment and Test Mode Flow Chart 8 1 1 TX CW Mode for Base Unit Note 1 When you check test mode connect to the external Buttons because Base Unit has only LOCATOR key Refer to Bottom View P 86 2 Refer to Check Table for RF part P 52 ...

Page 39: ... to Test Link Mode for Handset P 43 If you can not proceed to the next step refer to Registering a Handset to a Base Unit P 50 2 Refer to Check Table for RF part P 52 3 When you check test mode connect to the external Buttons because Base Unit has only LOCATOR key Refer to Bottom View P 86 ...

Page 40: ... TGA740MEB 8 1 3 Adjustment Mode for Base Unit Cross Reference Check and Adjust Frequency Base Unit P 62 Note 1 When you check test mode connect to the external Buttons because Base Unit has only LOCATOR key Refer to Bottom View P 86 ...

Page 41: ...41 KX TG7411MEB KX TG7412MEB KX TGA740MEB 8 1 4 TX CW Mode for Handset Note 1 LCD displays the Channel number exception default CH00 0ch 2 Refer to Check Table for RF part P 52 ...

Page 42: ...42 KX TG7411MEB KX TG7412MEB KX TGA740MEB 8 1 5 RX CW Test Mode for Handset Note 1 LCD displays the Channel number exception default CH00 0ch 2 Refer to Check Table for RF part P 52 ...

Page 43: ... displays the Channel number exception default CH00 0ch 2 If can not proceed to the next step refer to Registering a Handset to a Base Unit P 50 3 for factory use only 4 Refer to Check Table for RF part P 52 5 Operation for regular base unit Refer to CHART1 in the TEST RANGE Check P 53 ...

Page 44: ...7412MEB KX TGA740MEB 8 1 7 Adjustment Mode for Handset Cross Reference 1 Adjust Battery Low Detector Voltage Handset P 62 Note 2 These are the default values 3 These values may not be fixed depending on the battery strength ...

Page 45: ...o STOP mode so it is necessary to remove and re insert the handset battery to restart the handset 5 Remove and re insert the handset battery to re start the handset 6 Select Deregistration on the handset menu to release the handset s registration 3 Attention Dummy handset is necessary if you want to initialize the base unit only The base unit and handset can be initialized at the same time using t...

Page 46: ...MEB 10 Troubleshooting Guide 10 1 Troubleshooting Flowchart Cross Reference Check Power P 47 Check Battery Charge P 47 Check Link P 48 Check the RF part P 49 Check Handset Transmission P 56 Check Handset Reception P 56 Check Caller ID P 56 ...

Page 47: ...ly Circuit P 12 Reset Circuit P 14 Note DSP is IC501 1 Refer to Specifications P 6 for part number and sup ply voltage of AC adaptor 2 Refer to Circuit Board Base Unit_Main P 85 10 1 2 Check Battery Charge Note 1 Refer to Specifications P 6 for part number and supply voltage of AC adaptor ...

Page 48: ...48 KX TG7411MEB KX TG7412MEB KX TGA740MEB 10 1 3 Check Link Note DSP is IC501 1 Refer to Finding out the Defective part P 49 Cross Reference Check the RF part P 49 ...

Page 49: ... TGA740MEB 10 1 4 Check the RF part 10 1 4 1 Finding out 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 ...

Page 50: ...50 KX TG7411MEB KX TG7412MEB KX TGA740MEB 10 1 4 1 1 Registering a Handset to a Base Unit 10 1 4 1 2 Deregistering a Handset 10 1 4 1 3 Deregistering All Handsets by the Base Unit ...

Page 51: ...G7412MEB KX TGA740MEB 10 1 4 2 RF Check Flowchart Each item 1 6 of RF Check Flowchart corresponds to Check Table for RF part P 52 Please refer to the each item Note 1 Refer to Things to Do after Replacing IC or X tal P 62 ...

Page 52: ...de Test RX Mode BU HS Mode Test TX_Burst Mode 1 Place Regular HS 15 cm away from a checked BU 2 Confirm TXDATA waveform of BU 6 and RXDATA waveform of Regular HS by Digital Oscilloscope 1 Place Regular BU 15 cm away from a checked HS 2 Confirm TXDATA waveform of HS 5 and RXDATA waveform of Regular BU by Digital Oscilloscope 5 RX confirmation Regular HS BU Mode Test TX_Burst Mode BU HS Mode Test RX...

Page 53: ...m between HS and BU Link OK TX Power of the HS is OK No Link TX Power of the HS is NG Range Confirmation RX TEST RX sensitivity check HS BU Mode Test Link Mode 1 1 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 5 m between HS and BU Link OK RX Sensitivity o...

Page 54: ... mode SLOT_CTRL RADIO_EN IC701 TRSW_n Signal BS HS BS HS SLOT_CTRL 22 19 21 RADIO_EN 21 24 26 TRSW TRSW_n 11 TRSW 6 TRSW signal of RX zone in TX_Burst mode SLOT_CTRL RADIO_EN IC701 TRSW_n Signal BS HS BS HS SLOT_CTRL 22 19 21 RADIO_EN 21 24 26 TRSW TRSW_n 11 TRSW 6 IC501 IC501 IC501 DSP IC IC501 RF IC IC701 DSP IC IC501 RF IC IC701 10mS 1µs 10mS 10mS 500µ 500µ SLOT_CTRL RADIO_EN TRSW_n TRSW SLOT_C...

Page 55: ...e RX Confirmation of BS or TX confirmation of HS Base Unit TXDATA and Handset RXDATA on TXO signal line TX Confirmation of BS or RX confirmation of HS Handset RXDATA Base Unit TXDATA Handset RXDATA Base Unit TXDATA Base Unit RXDATA Handset TXDATA Base Unit RXDATA Handset TXDATA 10ms 9µs 10ms 9µs ...

Page 56: ...checking the RF part Refer to Check the RF part P 49 10 1 7 Check Caller ID Cross Reference Telephone Line Interface P 15 Calling Line Identification Caller ID Call Waiting Caller ID P 17 Note Make sure the format of the Caller ID service of the Tele phone company that the customer subscribes to It is also recommended to confirm that the customer is really a subscriber of the service ...

Page 57: ...57 KX TG7411MEB KX TG7412MEB KX TGA740MEB 11 Disassembly and Assembly Instructions 11 1 Disassembly Instructions 11 1 1 Base Unit ...

Page 58: ...58 KX TG7411MEB KX TG7412MEB KX TGA740MEB 11 1 2 Handset ...

Page 59: ...59 KX TG7411MEB KX TG7412MEB KX TGA740MEB 11 1 3 Charger Unit ...

Page 60: ...60 KX TG7411MEB KX TG7412MEB KX TGA740MEB 11 2 How to Replace the Handset LCD ...

Page 61: ...61 KX TG7411MEB KX TG7412MEB KX TGA740MEB ...

Page 62: ...g tolerance 100 Hz adjust to Adjustment tolelance 30 Hz by pressing or key Adjustment Tolerance 13 824 MHz 30 Hz 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 for Handset P 44 12 1 4 Adjust Battery Low Detector Voltage Handset After handset s DSP IC501 or EEPROM IC541 replacement Re writing Battery Low...

Page 63: ... C509 UGND INT0 RXI P15 UTX BCLK URX 3 4 50 51 25 26 1 100 75 JO JI JS JC 76 INT1 KEY B 1 2 3 TE MIC MIP MIN A HSOUT 1 UVCC C501 C503 C504 IC501 TEL DC RED RED RED WHT BLK BLK YEL GRN T R RING L1R L1T DCM2 DCP DCP2 DCM PNLB1089Z PbF VCC JG KEY_GND C102 C101 C115 C116 R115 D101 C515 C516 C519 C459 C352 RA452 C458 C457 C476 R592 R591 R593 R594 C469 R156 L372 IC321 D143 D142 Q161 Q156 C321 C142 C162 ...

Page 64: ...541 IC371 IC373 IC741 RA401 RA402 RA552 RA501 RA551 RA403 D413 D412 D771 Q361 Q364 Q543 Q390 C362 F301 C531 C353 C363 C436 C432 C435 CN431 C371 C541 C519 C511 C391 C512 C533 C534 C535 C532 C522 C521 C520 C526 C544 C501 C510 R537 C596 CI C514 C540 C755 C772 C781 C797 C796 C793 C791 C782 C711 C712 C722 C714 C721 C777 C776 C758 C701 C753 C752 C761 C773 C756 R367 R368 R369 C546 R363 R366 R431 R437 R43...

Page 65: ...cy Table Ch hex TX RX Frequency MHz Channel 0 00 1928 448 Channel 1 01 1926 720 Channel 2 02 1924 992 Channel 3 03 1923 264 Channel 4 04 1921 536 Channel 5 05 1919 808 Channel 6 06 1918 080 Channel 7 07 1916 352 Channel 8 08 1914 624 Channel 9 09 1912 896 ...

Page 66: ...O NC 38 D O RF_RST Normal WakeUp 39 D O NC 40 D O NC 41 D O NC 42 D I O EEPROM_Data High_Z Low 43 D O EEPROM_CLK High Middle Low 44 D O EEPROM_WP WP Write 45 D O NC 46 GND GND GND 47 VCC VCC VCC 48 D I O NC INT0 49 D O NC 50 D O NC 51 D O NC 52 D O NC 53 D O KEY_STB_C Active Not 54 D O KEY_STB_B Active Not 55 D O NC 56 D O NC 57 D O NC 58 D I BELL OFF ON 59 D O RLY Off Hook On Hook 60 D O NC 61 D ...

Page 67: ...D D O 48 GND7 GND 49 VCC2 VCC 50 RESET D O Nonactive Active 51 FL_CLK D O 52 CI D O 53 NC D O 54 NC D O 55 ANT_LED D O Active Nonactive 56 A0 D O 57 NC D O 58 NC D O 59 LCD_POWER D O Active Nonactive 60 NC D O 61 CS1 D O 62 NC D O 63 KEYSTROBE_E D O Nonactive Active 64 KEYSTROBE_D D O Nonactive Active 65 KEYSTROBE_C D O Nonactive Active 66 KEYSTROBE_B D O Nonactive Active 67 KEYSTROBE_A D 0 Nonact...

Page 68: ...68 KX TG7411MEB KX TG7412MEB KX TGA740MEB 13 3 Explanation of IC Terminals RF Part 13 3 1 IC701 ...

Page 69: ...e See About Lead Free Solder PbF Pb free P 4 13 4 2 How to Remove the IC 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 its pins first and then cut off the pins thoroughly 3 While the solder melt...

Page 70: ...acy of the IC setting with 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 13 4 4 How to Remove a Solder Bridge 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below ...

Page 71: ...oil Hot Air Desoldering Tool Temperature 608 F 68 F 320 C 20 C 13 5 2 Caution To replace the IC efficiently choose the right sized nozzle of the hot air desoldering tool that matches the IC package Be careful about the temperature of the hot air desoldering tool not to damage the PCB and or IC 13 5 3 How to Remove the Shield Case Note If you don t have special tools ex Hot air disordering tool con...

Page 72: ...ngs 13 5 5 How to Remove the IC 1 Heat the IC with a hot air desoldering tool through the P C Board 2 Pick up the IC with tweezers etc when the solder is melted completely Note Be careful not to touch the peripheral parts with tweezers etc They are unstable When it is hard to melt the solder completely heat it with a hot air desoldering tool through the IC besides through the P C Board 3 After rem...

Page 73: ...g the IC the positioning should be done very carefully 3 Heat the IC with a hot air desoldering tool through the P C Board until the solder on IC bottom is melted Note Be sure to place it precisely controlling the air volume of the hot air desoldering tool 4 After soldering confirm there are no short and open circuits with visual inspection 13 5 7 How to Remove a Solder Bridge When a Solder Bridge...

Page 74: ...74 KX TG7411MEB KX TG7412MEB KX TGA740MEB 13 6 Terminal Guide of the ICs Transistors and Diodes 13 6 1 Base Unit 13 6 2 Handset ...

Page 75: ...e development of new technology 14 1 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 may be modified at any time with the development of new technology 14 1 3 Charger Unit Schematic Diagram Charger Unit Notes 1 DC voltage measurements are taken with voltmeter from the negative voltage line 2 ...

Page 76: ...8 NC C689 NC C509 10p C508 10p C611 0 1 NC L478 NC L479 100 R322 140 R321 1k R178 WBX03 NC 10u C322 1u C383 10p C477 10p C478 10p C185 13 824MHz X501 4 NC TXMOD 5 NC1 6 XIN 7 XOUT 8 VDD 9 VCCIN 10 GND1 11 RSTN 12 FLASH_RE 13 FLASH_SO 14 FLASH_SI 15 FLASH_CS 16 NC2 17 SYN_OUT 18 TX_DATA 19 SLOT_CTRL 20 NC3 21 NC4 22 NC5 29 SYN_CLK 30 SYN_DATA 31 NC8 32 NC9 33 FCCP15 34 RX_DATA 35 NC10 36 NC11 37 NC...

Page 77: ...K D153 A K R362 0 NC L372 R375 NC L362 NC C331 K0 47u 100k R172 K1 0u C342 K0 01u C152 10M R151 D301 390 R181 56 R182 C181 0 1u 27 R167 22 R171 82 R160 12 R163 2 7k R164 820 R168 C184 K1 0u 1000p C172 C169 NC NC C170 680p C121 680p C122 100k R111 100k R112 R131 10M R363 0 D143 25V 3 3M R152 R365 NC 680p C101 680p C102 NC C116 0 22u C115 Q141 B E C 50 10u C161 C174 NC 0 022u C178 C179 NC C361 NC C1...

Page 78: ...1 NC C761 D10p C773 NC C791 NC C795 D10p C782 D10p C781 ANT1 ANT2 B1 5p C776 J33p C772 B1 8p C777 B1 8p C775 10p C793 10p C797 C765 10p 5 6nH L754 0 L795 0 L791 D781 1 2 3 D771 1 2 3 0 5p C796 NC C792 560 L796 560 L797 560 L798 NC R782 NC R771 B1 8p C764 0 5p C762 NC R781 NC No Components 1 2 3 4 5 6 ...

Page 79: ... C703 D10p C705 D10p C707 D10p C711 K1uF C708 NC L739 C713 NC ZA1 1 2 3 4 4 7n L751 4 7n L753 18n L752 NC C758 IC701 1 VCC_VCO 2 PAEN 9 TX_p 3 ATST_p 4 ATST_n 5 ANT_n 6 TRSW 7 Rxp 8 Rxn 10 TX_n 11 TRSW_n 12 ANT 13 VCC_FE 14 VDD_IF 15 VCC_IF 16 VDD_DIG_b 17 VCC_DIG 18 RSTN 19 VCC_IO 20 TR_DATA 21 RADIOEN 22 SLOT_CTRL 23 SYN_DAT 24 SYN_CLK 25 SYN_EN 26 SYN_OUT 27 VDD_DIG_t 28 DTEST 29 DTST1 30 REF_I...

Page 80: ...SYN_CLK 32 SYN_DATA 33 NC 34 TX_EN 35 KEY_BL_LED 36 RX_DATA 37 NC 38 CHG_DET 39 NC 40 LCD_BACK_LIGHT 41 NC8 42 CHG_CTL 43 NC 44 NC 45 NC 46 DB6 SCL 47 DB7 SID 54 NC 55 ANT_LED 56 A0 57 NC 58 NC 59 LCD_POWER 60 NC 61 CS1 62 NC 63 KEYSTB_E 64 KEYSTB_D 65 KEYSTB_C 66 KEYSTB_B 67 KEYSTB_A 68 GND8 69 VCC3 70 TCK 71 TMS 72 TDI 79 FB1 80 FB2 81 EEPROM_CLK 82 EEPROM_DATA 83 UART_TX 84 UART_RX 85 EEPROM_WP...

Page 81: ...0 GND_0 GND_0 GND_0 GND_0 3 1V D426 D427 D423 D424 K0 1 C506 47 R371 0 022u C414 0 022u C415 1000p C416 RX TX VBAT VSS SPP SPM MICP MICM MIC 1 2 K1 0 C421 K1 0 C371 K1 0 C372 NC 4 VSS 3 NC 1 OUT 2 VDD NC C390 NC Q390 NC R391 NC R390 NC C391 NC R393 NC R392 V_BAT1 10p C523 10p C522 10p C521 10p C520 0 R600 47k R526 680u 6 3 C361 2 7V 1 VIN 2 VSS 3 ONOFF 5 VOUT 4 NC NC R505 NC R506 NC R507 10n L374 ...

Page 82: ... C771 NC C761 D10p C773 NC C791 NC C795 D10p C782 D10p C781 B1 8p C775 B1 8p C777 B1 5p C776 J33p C772 ANT2 D10p C793 D10p C797 10p C765 5 6nH L754 0 L791 0 L795 D781 1 2 3 D771 1 2 3 0 5p C792 NC C796 560 L798 NC R781 NC R782 560 L797 560 L796 NC R771 1 8p C764 0 5p C762 1 2 3 4 5 6 NC No Components ...

Page 83: ...1 D10p C703 D10p C705 D10p C707 D10p C711 K1uF C708 NC L739 4 7n L751 4 7n L753 ZA1 1 2 3 4 NC C758 18n L752 1 VCC_VCO 2 PAEN 9 TX_p 3 ATST_p 4 ATST_n 5 ANT_n 6 TRSW 7 Rxp 8 Rxn 10 TX_n 11 TRSW_n 12 ANT 13 VCC_FE 14 VDD_IF 15 VCC_IF 16 VDD_DIG_b 17 VCC_DIG 18 RSTN 19 VCC_IO 20 TR_DATA 21 RADIOEN 22 SLOT_CTRL 23 SYN_DAT 24 SYN_CLK 25 SYN_EN 26 SYN_OUT 27 VDD_DIG_t 28 DTEST 29 DTST1 30 REF_IN 31 VCC...

Page 84: ...84 KX TG7411MEB KX TG7412MEB KX TGA740MEB 14 6 Schematic Diagram Charger Unit J1 2 1 TP3 G TP2 TP1 TP4 R1 12 2W NC A K F1 SCHEMATIC DIAGRAM Charger Unit ...

Page 85: ...9 D341 Q171 Q362 Q361 C164 C474 C471 C160 C167 C143 C141 C132 C113 R113 R133 R144 R145 R142 R168 R122 R121 R131 D113 A Q142 C120 C479 C343 C121 C122 C114 C111 C112 R114 R111 R112 Q111 SHIELD C456 C518 C451 C517 C151 C514 C601 C603 C605 C611 C612 C513 C604 R421 R611 R612 R602 R603 R533 R134 R154 R521 L501 RA451 C672 C687 C688 C689 C684 C685 C686 C662 C674 C660 C671 C661 C185 C521 C454 C455 C452 C33...

Page 86: ...O JI JS JC 76 INT1 KEY B 1 2 3 TE MIC MIP MIN A HSOUT 1 UVCC C501 C503 C504 IC501 TEL DC RED RED RED WHT BLK BLK YEL GRN T R RING L1R L1T DCM2 DCP DCP2 DCM PNLB1089Z PbF VCC JG KEY_GND C102 C101 C115 C116 R115 D101 C515 C516 C519 C459 C352 RA452 C458 C457 C476 R592 R591 R593 R594 C469 R156 L372 IC321 D143 D142 Q161 Q156 C321 C142 C162 C163 C152 R322 R321 R375 R361 R363 R151 R152 R165 R155 R157 L37...

Page 87: ... C757 C751 C708 C703 C704 C702 C705 C706 C764 C762 C754 R772 R771 R736 R731 R732 R715 L751 L791 L754 L796 L739 D771 C755 C772 C781 C797 C796 C793 C791 C782 C711 C712 C722 C714 C721 C777 C776 C758 C701 C753 C752 C761 C773 C756 R782 R781 L753 L798 L795 L752 L797 L721 D781 KX TG7411 7412 CIRCUIT BOARD Base Unit_RF Part Component View ...

Page 88: ...501 RA551 RA403 D413 D412 D771 Q361 Q364 Q543 Q390 C362 F301 C531 C353 C363 C436 C432 C435 CN431 C371 C541 C519 C511 C391 C512 C533 C534 C535 C532 C522 C521 C520 C526 C544 C501 C510 R537 C596 CI C514 C540 C755 C772 C781 C797 C796 C793 C791 C782 C711 C712 C722 C714 C721 C777 C776 C758 C701 C753 C752 C761 C773 C756 R367 R368 R369 C546 R363 R366 R431 R437 R436 R417 R434 R374 R371 R542 R380 R507 R506 ...

Page 89: ...40MEB 15 3 2 Bottom View 1 2 CN3 OTP 3 SP FLASH LEFT RIGHT TALK SW1 OFF 4 5 6 7 MIC 8 9 LED553 LED552 MIC MIC LED554 LED557 LED561 W_LED 2 W_LED W_LED 1 LED556 LED555 LED559 LED558 LED551 0 KX TGA740 CIRCUIT BOARD Handset_Main Bottom View ...

Page 90: ... ATSTp ZA1 C704 C702 C705 C706 C764 C762 C754 R772 R771 R736 R731 R732 R715 L751 L791 L754 L796 L739 D771 C755 C772 C781 C797 C796 C793 C791 C782 C711 C712 C722 C714 C721 C777 C776 C758 C701 C753 C752 C761 C773 C756 R782 R781 L753 L798 L795 L752 L797 L721 IC701 D781 24 25 32 17 16 9 8 1 KX TGA740 CIRCUIT BOARD Handset__RF Part Component View ...

Page 91: ...5 5 Circuit Board Charger Unit 15 5 1 Component View 15 5 2 Bottom View J1 R1 A PQUP11532Y PbF PNLP1029YA CIRCUIT BOARD Charger unit Component View TP4 TP3 1 2 J1 A F1 PbF PNLP1029YA PQUP11532Y CIRCUIT BOARD Charger unit Bottom View TP4 GND TP3 ...

Page 92: ...0MEB 16 Exploded View and Replacement Parts List 16 1 Cabinet and Electrical Parts Base Unit Note 1 Attach the double side tape to the exact location described above 2 Refer to the spacer No 109 of Cabinet and Electrical Parts Handset P 93 ...

Page 93: ...s fixed by welding Refer to How to Replace the Handset LCD P 60 2 Refer to Handset P 74 of Terminal Guide of the ICs Transistors and Diodes 3 The rechargeable Ni MH battery HHR 4EPT or HHR 4MPT is available through sales route of Panasonic 4 Attach the SPACER No 121 to the exact location described above ...

Page 94: ...94 KX TG7411MEB KX TG7412MEB KX TGA740MEB 16 3 Cabinet and Electrical Parts Charger Unit ...

Page 95: ...95 KX TG7411MEB KX TG7412MEB KX TGA740MEB 16 4 Accessories and Packing Materials 16 4 1 KX TG7411MEB ...

Page 96: ...96 KX TG7411MEB KX TG7412MEB KX TGA740MEB 16 4 2 KX TG7412MEB ...

Page 97: ...97 KX TG7411MEB KX TG7412MEB KX TGA740MEB 16 4 3 KX TGA740MEB ...

Page 98: ...3 PNKM1075Z1 CABINET BODY ABS HB 4 K2ECYZ000001 JACK DC 5 PQJJ1T039T JACK MODULAR 6 PNKE1028Z1 CASE CHARGE TERMINAL PS HB 7 PNBC1026Y1 BUTTON AS HB 8 PNHR1117Z GUIDE BUTTON ABS HB 9 PNYE1010Z SPACER ANTENNA 10 PNLA1002Z ANTENNA 11 PNJT1024Z CHARGE TERMINAL 12 PNKF1054Y1 CABINET COVER PS HB 13 PQHA10023Z RUBBER PARTS FOOT 14 PNGT2424Z NAME PLATE Safety Ref No Part No Part Name Description Remarks P...

Page 99: ...05KBQ 1 C422 ECUE1A104KBQ 0 1 C476 ECUE1H100DCQ 10p C477 ECUE1H100DCQ 10p Safety Ref No Part No Part Name Description Remarks C478 ECUE1H100DCQ 10p C501 ECUE1A104KBQ 0 1 C503 ECUE1A104KBQ 0 1 C504 ECUE1A104KBQ 0 1 C508 ECUE1H100DCQ 10p C509 ECUE1H100DCQ 10p C513 ECUE1A104KBQ 0 1 C514 PQCUV0J106KB 10 C515 ECUV0J105KBV 1 C516 PQCUV0J106KB 10 C517 ECUE1A104KBQ 0 1 C518 PQCUV0J106KB 10 C521 ECUE1A104K...

Page 100: ...SI LED551 B3ACB0000216 DIODE SI LED552 B3ACB0000216 DIODE SI LED553 B3ACB0000216 DIODE SI LED554 B3ACB0000216 DIODE SI LED558 B3ACB0000216 DIODE SI LED559 B3ACB0000216 DIODE SI LED561 B3ACB0000216 DIODE SI COILS L434 PQLQR2KB113T COIL S L721 G1C1R0KA0096 COIL Safety Ref No Part No Part Name Description Remarks L374 G1C100MA0395 COIL L751 ELJRF4N7ZFB COIL S L752 MQLRF18NJFB COIL L753 ELJRF4N7ZFB CO...

Page 101: ... 1 C751 F1G1H1R3A561 1 3p C752 ECUE1H100DCQ 10p C753 F1G1H1R0A561 1p C754 ECUE1A104KBQ 0 1 C755 F1G1H1R2A561 1 2p C757 F1G1H1R3A561 1 3p C762 F1G1HR50A561 0 5p C764 F1G1H1R8A561 1 8p C765 ECUE1H100DCQ 10p C771 ECUE1H100DCQ 10p C772 ECUE1H330JCQ 33p C773 ECUE1H100DCQ 10p C775 F1G1H1R8A561 1 8p C776 F1G1H1R5A561 1 5p C777 F1G1H1R8A561 1 8 Safety Ref No Part No Part Name Description Remarks C781 ECUE...

Page 102: ...OVER for Base Unit P102 PQPH10088Z PROTECTION COVER for Handset P103 PNPM1003Z PROTECTION COVER for Charger Unit P104 PNPK2458Z GIFT BOX P105 PNPD1166Z CUSHION Safety Ref No Part No Part Name Description Remarks A201 PQLV219Z AC ADAPTOR A202 PNKE1029Z1 HANGER BELT CLIP ABS HB A203 PNQX1655Z INSTRUCTIONBOOK 1 P201 PQPH10088Z PROTECTION COVER for Handset P202 PNPM1003Z PROTECTION COVER for Charger U...

Search results

Summary of Contents for KX-TGA740

Reviews:

Related manuals for KX-TGA740

Brands by name

Popular brands

Panasonic KX-TGA740, Service Manual

Search results

Summary of Contents for KX-TGA740

Reviews:

Related manuals for KX-TGA740

Brands by name

Popular brands