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Panasonic KX-TG7411MEB Service Manual

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Telephone Equipment
KX-TG7411MEB
Model No.
KX-TG7412MEB
KX-TGA740MEB
Expandable Digital Cordless Phone
B: Black Version
(for Mexico)
© Panasonic Communications Co., Ltd. 2009.
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KM40905922CE

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Summary of Contents for Panasonic KX-TG7411MEB

  • Page 1 ORDER NO. KM40905922CE Telephone Equipment KX-TG7411MEB Model No. KX-TG7412MEB KX-TGA740MEB Expandable Digital Cordless Phone B: Black Version (for Mexico) © Panasonic Communications Co., Ltd. 2009. Unauthorized copying and distribution is a violation of law.
  • Page 2 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB...

  • Page 3: Table Of Contents

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions----------------------------------------------- 4 15 Printed Circuit Board ------------------------------------------ 85 1.1. For Service Technicians --------------------------------- 4 15.1. Circuit Board (Base Unit_Main) ---------------------- 85 2 Warning -------------------------------------------------------------- 4 15.2. Circuit Board (Base Unit_RF Part)------------------- 87 2.1.

  • Page 4: Safety Precautions

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 1 Safety Precautions 1.1. For Service Technicians • Repair service shall be provided in accordance with repair technology information such as service manual so as to pre- vent fires, injury or electric shock, which can be caused by improper repair work.

  • Page 5: Discarding Of P. C. Board

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 2.2.1. Suggested PbF Solder There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper (Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu), or Tin, Zinc, 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.

  • Page 6: Specifications

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 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: Technical Descriptions

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4 Technical Descriptions 4.1. US-DECT Description The frequency range of 1.91 GHz-1.93 GHz is used. Transmitting and receiving carrier between base unit and handset is same fre- quency. Refer to Frequency Table (P.65). 4.1.1. TDD Frame Format 4.1.2. TDMA system This system is the cycles of 10 ms, and has 6 duplex paths, but maximum duplex communication path is 5 because of dummy bearer use.
  • Page 8 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.1.3. Signal Flowchart in the Radio Parts Reception A voice signal from TEL line is encoded to digital data "TXDATA" by DSP (IC501) in a base unit. 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.

  • Page 9: Block Diagram (Base Unit_Main)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.2. Block Diagram (Base Unit_Main)

  • Page 10: Block Diagram (Base Unit_Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.3. Block Diagram (Base Unit_RF Part)

  • Page 11: Circuit Operation (Base Unit)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.4. Circuit Operation (Base Unit) General Description: (DSP, EEPROM) is a digital speech/signal processing system that implements all the functions of speech compression, and memory management required in a digital telephone. The DSP system is fully controlled by a host processor DSP. The host processor provides activation and control of all that func- tions as follows.
  • Page 12 KX-TG7411MEB/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 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 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.4.4. Reset Circuit Function: This circuit is used to initialize the microcomputer when it 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.
  • Page 15 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.4.5. Telephone Line Interface Telephone Line Interface Circuit: Function • Bell signal detection • ON/OFF hook and pulse dial circuit • Side tone circuit Bell signal detection and OFF HOOK circuit: In the idle mode, 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 →...
  • Page 16 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.4.6. Parallel Connection Detect Circuit Function: In order to disable call waiting and stutter tone functions when using telephones connected in parallel, it is necessary to have a circuit that judges whether a telephone connected in parallel is in use or not. This circuit determines whether the telephone con- nected in parallel is on hook or off hook by detecting changes in the T/R voltage.
  • Page 17 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.4.7. Calling Line Identification (Caller ID)/Call Waiting Caller ID Function: The caller ID is a chargeable ID which the user of a telephone circuit obtains by entering a contract with the telephone company to utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been entered for the circuit being used.

  • Page 18: Block Diagram (Handset)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.5. Block Diagram (Handset) IC541 ANT2 ANT1 X501 EEPROM 13.824 MHz Q531 CHARGE CHG_DET DETECT Q362, Q364 RF part CHG_CTL CHARGE CONTROL SYN_OUT SYN_EN SYN_CLK RESET SYN_DATA Q361 D361 SLOT_CTROL CHARGE RADIO_EN IC374 TXDATA RXDATA RF_RSTN IC371 2.7 V...

  • Page 19: Block Diagram (Handset_Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.6. Block Diagram (Handset_RF Part)

  • Page 20: Circuit Operation (Handset)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.7. Circuit Operation (Handset) 4.7.1. Construction The circuit mainly consists of DSP and RF part as shown in the block diagram. 4.7.1.1. DSP: IC501 Function • Battery Low, Power down detect circuit • Ringer Generation • Interface circuit RF part, Speaker, Mic, LED, Key scan, LCD, Headset...
  • Page 21 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.7.2. Power Supply Circuit Voltage is supplied separately to each block.
  • Page 22 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.7.3. Charge Circuit When the handset is put on the cradle of the base unit, the power is supplied from CHARGE+ and CHARGE- terminals to charge the battery via R366 or Q361. The voltage between CHARGE+ and CHARGE- flows Q531 → pin 38 of IC501, where the charge is detected.
  • Page 23 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.7.5. Sending Signal The voice signal from the microphone is input to DSP (90, 91). CN431 is the headset jack. When the headphone is connected, the R436/R437 detects it. The input from the microphone of the handset (MIM, MIP) is cut and the microphone signal from the headset is input to DSP (95).

  • Page 24: Circuit Operation (Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.8. Circuit Operation (RF Part) General Description: 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.

  • Page 25: Circuit Operation (Charger Unit)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.9. Circuit Operation (Charger Unit) The voltage from the AC adaptor is supplied 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.

  • Page 26: Signal Route

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 4.10. Signal Route RF part signal route...

  • Page 27: Location Of Controls And Components

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 5 Location of Controls and Components 5.1. Controls 5.1.2. Handset 5.1.1. Base Unit...

  • Page 28: Display

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 5.2. Display...

  • Page 29: Installation Instructions

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 6 Installation Instructions 6.1. Connections 6.2. Battery 6.2.1. Battery 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 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 6.2.3. Battery Level 6.2.4. Panasonic Ni-MH Battery Perfor- mance (supplied batteries)

  • Page 31: Operating Instructions

    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 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB...
  • Page 33 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 7.1.2. Programming using the Direct Commands...

  • Page 34: Error Messages

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 7.2. Error Messages...

  • Page 35: Troubleshooting

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 7.3. Troubleshooting...
  • Page 36 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB...
  • Page 37 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB...

  • Page 38: Test Mode

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 8 Test 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).
  • Page 39 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 8.1.2. Test Link Mode for Base Unit Note: (*1) Refer 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).
  • Page 40 KX-TG7411MEB/KX-TG7412MEB/KX-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 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 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 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 8.1.6. Test Link Mode for Handset Note: (*1) LCD 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.
  • Page 44 KX-TG7411MEB/KX-TG7412MEB/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: Service Mode

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 9 Service Mode 9.1. How to Clear User Setting Units are reset to the Factory settings by this operation (Erase, stored Phone numbers, Caller list and etc.). This operation should not be performed for a usual repair. 9.1.1. Base Unit 1.

  • Page 46: Troubleshooting Guide

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 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 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 10.1.1. Check Power Cross Reference: Note: Power Supply Circuit (P.12) DSP is IC501. Reset Circuit (P.14) (*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).
  • Page 48 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 10.1.3. Check Link Cross Reference: Note: Check the RF part (P.49) DSP is IC501. (*1) Refer to Finding out the Defective part (P.49).
  • Page 49 KX-TG7411MEB/KX-TG7412MEB/KX-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 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 KX-TG7411MEB/KX-TG7412MEB/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 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 10.1.4.3. Check Table for RF part Item BU (Base Unit) Check HS (Handset) Check Link Confirmation Normal 1. Register Regular HS to BU (to be 1. Register HS (to be checked) to Regular checked). HS, BU Mode [Normal Mode] 2.
  • Page 53 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 10.1.4.4. TEST RANGE Check Circuit block which range is defective can be found by the following check. Item BU (Base Unit) Check HS (Handset) Check Range Confirmation TX TEST 1. Register Regular HS to BU (to be checked). 1. Register HS (to be checked) to Regular BU.
  • Page 54 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 10.1.4.5. RF-DSP Interface Signal Wave Form Control signal in TX_Burst mode 10mS SLOT_CTRL SYN_EN SYN_CLK SYN_DAT SLOT_CTRL 1µs SYN_EN Pin Number IC701 IC501 Signal SYN_CLK BS/HS SLOT_CTRL SYN_EN SYN_DAT SYN_CLK SYN_DAT TRSW signal of TX zone in TX_Burst mode...
  • Page 55 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB Base Unit TXDATA and Handset RXDATA on TXO signal-line (TX Confirmation of BS or RX confirmation of HS) Base Unit TXDATA 10ms Handset RXDATA Base Unit TXDATA 9µs Handset RXDATA Handset TXDATA and Base unit RXDATA on TXO signal-line...
  • Page 56 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 10.1.5. Check Handset Transmission Cross Reference: Signal Route (P.26) 10.1.6. Check Handset Reception Cross Reference: Signal Route (P.26) Note: When 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)

  • Page 57: Disassembly And Assembly Instructions

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 11 Disassembly and Assembly Instructions 11.1. Disassembly Instructions 11.1.1. Base Unit...
  • Page 58 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 11.1.2. Handset...
  • Page 59 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 11.1.3. Charger Unit...

  • Page 60: How To Replace The Handset Lcd

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 11.2. How to Replace the Handset LCD...
  • Page 61 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB...

  • Page 62: Measurements And Adjustments

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 12 Measurements and Adjustments 12.1. Things to Do after Replacing IC or X’tal 12.1.1. Preparation Equipment: Frequency counter Check Point for measurement: BCK Checking tolerance: 13.824 MHz ± 100 Hz (Base Unit)/13.824 MHz ± 100 Hz (Handset) 12.1.2. Check and Adjust Frequency (Base Unit) 1.

  • Page 63: Base Unit Reference Drawing

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 12.2. Base Unit Reference Drawing When connecting the simulator equipment for checking, please refer to below. 6.5V SPN SPP PNLB1089Z CHARGE- CHARGE+ KX-TG64/74/84 L372 RING ANT1_GND IC321 C713 Spectrum Analyzer DCM2 ANT1_H UVCC UGND BCLK Frequency Counter(*1) Q156 DCP2...

  • Page 64: Handset Reference Drawing

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 12.3. Handset Reference Drawing When connecting the simulator equipment for checking, please refer to below. Note: (*1) is referred to No.3 of Check Table for RF part (P.52).

  • Page 65: Frequency Table

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 12.4. Frequency Table Ch. (hex) TX/RX Frequency (MHz) Channel 0 1928.448 Channel 1 1926.720 Channel 2 1924.992 Channel 3 1923.264 Channel 4 1921.536 Channel 5 1919.808 Channel 6 1918.080 Channel 7 1916.352 Channel 8 1914.624 Channel 9 1912.896...

  • Page 66: Miscellaneous

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13 Miscellaneous 13.1. CPU Data (Base Unit) 13.1.1. IC501 Description High High_Z D.O NC Description High High_Z D.O NC GND GNDPA D.O NC A.O NC D.I KEY_IN3 Key In A.O BCLK D.I KEY_IN2 Key In A.O TXMOD D.I KEY_IN1 Key In A.I NC...

  • Page 67: Cpu Data (Handset)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.2. CPU Data (Handset) IC501 13.2.1. Description High High_Z 63 KEYSTROBE_E Nonactive Active Description High High_Z 64 KEYSTROBE_D Nonactive Active GND1(GNDPA) 65 KEYSTROBE_C Nonactive Active SPP2 66 KEYSTROBE_B Nonactive Active BCLK 67 KEYSTROBE_A Nonactive Active (NC) 68 GND8 69 VCC3...

  • Page 68: Explanation Of Ic Terminals (Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.3. Explanation of IC Terminals (RF Part) IC701 13.3.1.

  • Page 69: How To Replace The Flat Package

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.4. How to Replace the Flat Package IC 13.4.1. Preparation • PbF (: Pb free) Solder • Soldering Iron Tip Temperature of 700 °F ± 20 °F (370 °C ± 10 °C) Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil.
  • Page 70 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.4.3. How to Install the IC 1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins. *Check the accuracy of the IC setting with the corresponding soldering foil. 2. Apply flux to all pins of the FLAT PACKAGE IC.

  • Page 71: How To Replace The Llp

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.5. How to Replace the LLP (Leadless Leadframe Package) IC 13.5.1. Preparation • PbF (: Pb free) Solder • Soldering Iron Tip Temperature of 700 °F ± 20 °F (370 °C ± 10 °C) Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil.
  • Page 72 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.5.4. How to Install the Shield Case Note: • If you don’t have special tools (ex. Hot air disordering tool), conduct the following operations. • Shield case’s No. : PNMC1014Z 1. Put the shield case. 2. Solder the surroundings.
  • Page 73 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 13.5.6. How to Install the IC 1. Place the solder a little on the land where the radiation GND pad on IC bottom is to be attached. 2. Place the solder a little on the land where IC pins are to be attached, then place the IC.

  • Page 74: Terminal Guide Of The Ics, Transistors And Diodes

    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: Schematic Diagram

    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.

  • Page 76: Schematic Diagram (Base Unit_Main)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 14.2. Schematic Diagram (Base Unit_Main) 3.0V RF Interface IC321 L382 V_PA VOUT1 V_PA V_PA INPUT (VPA) VOUT2 V_RF V_RF 3.3V 3.0V BCLK C521 BCLK BCLK R521 0.1u SYN_OUT SYN_OUT SYN_OUT SYN_EN SYN_EN SYN_EN SYN_CLK SYN_CLK SYN_CLK SYN_DATA SYN_DATA SYN_DATA...
  • Page 77 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 3.3V 7.5 ~ 6.5V (+6.7V) IC331 VOUT REFERENCE D341 R372 R371 1XX : TEL LINE VDET 3XX : POWER, CHARGE *RESET 4XX : RESET, MIC, SP R374 R373 5XX : DSP, RF I/F Charging detection 6XX : FLASH, KEY, LCD 7XX : RF(2.4G)

  • Page 78: Schematic Diagram (Base Unit_Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 14.3. Schematic Diagram (Base Unit_RF Part) C793 L791 ANT2 D781 D771 C776 B1.5p C773 D10p C797 L795 ANT1 C765 10p L754 5.6nH NC: No Components...
  • Page 79 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 3.0V V_RF PP:3.1V C721 J100p BCLK SYN_OUT R731 SYN_EN R732 SYN_CLK SYN_DATA VCC_VCO SYN_CLK SLOT_CTRL 3.3V PAEN SYN_DAT ATST_p ATSTp SLOT_CTRL RADIO_EN ATST_n RADIOEN ANT_n TR_DATA TRSW VCC_IO RSTN VCC_DIG IC701 RX_DATA R715 R736 TX_DATA DVCC PP:2.7V L739 L753 4.7n...

  • Page 80: Schematic Diagram (Handset_Main)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 14.4. Schematic Diagram (Handset_Main) RF circuit BCLK R540 BCLK C540 K0.1 TX_DATA TX_DATA SLOT_CTRL SLOT_CTRL RX_DATA RX_DATA DVCC RADIO_EN RF control line RF_RSTN RF_RSTN 2.7V SYN_DATA X501 SYN_DATA 3.1V NC C519 C515 SYN_EN 13.824MHz V_BAT1 SYN_EN K0.1 R501 SYN_CLK...
  • Page 81 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB SP phone RX TEST SIGNAL (MIC Mute: ON) FREQUENCY:1kHz 1.8Vp-p/8 (Vol.Max) Voice circuit SP_PHONE 2.7V GND_0 GND_0 R436 Headset TX R431 50mVp-p/600 CN431 HEADSET_JACK L434 C435 Headset RX 10uF 170mVp-p/150 (Vol. Max) Analog GND RA403 RECEIVER C436 GNDPA Handset RX...

  • Page 82: Schematic Diagram (Handset_Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 14.5. Schematic Diagram (Handset_RF Part) C793 D10p L791 ANT2 D781 D771 C776 B1.5p C773 D10p C797 D10p L795 ANT1 C765 L754 5.6nH NC: No Components...
  • Page 83 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 2.7V V_RF PP:2.7V C721 J100p BCLK SYN_OUT R731 SYN_EN R732 SYN_CLK SYN_DATA VCC_VCO SYN_CLK SLOT_CTRL 2.7V PAEN SYN_DAT ATSTp ATST_p SLOT_CTRL RADIO_EN ATST_n RADIOEN ANT_n TR_DATA TRSW VCC_IO RSTN VCC_DIG IC701 RX_DATA R736 R715 TX_DATA PP:2.7V DVCC L739 L753 4.7n...

  • Page 84: Schematic Diagram (Charger Unit)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 14.6. Schematic Diagram (Charger Unit) 12 (2W) SCHEMATIC DIAGRAM (Charger Unit)

  • Page 85: Printed Circuit Board

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15 Printed Circuit Board 15.1. Circuit Board (Base Unit_Main) 15.1.1. Component View V_PA V_RF R362 F301 3.0A C797 C796 C793 D301 D362 C781 R374 L795 C467 L798 R781 C791 C776 R364 R365 L797 C761 C773 R373 C777 R782 D781...
  • Page 86 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15.1.2. Bottom View BCLK Digital Vcc 13.824MHz (DVCC) V_RF Reset SPN SPP PNLB1089Z CHARGE- KX-TG64/74/84 CHARGE+ L372 RING ANT1_GND IC321 C713 DCM2 ANT1_H UVCC UGND Q156 DCP2 D143 Q161 C501 C503 R156 BCLK DVCC D142 C469 ANT2_H R422 C422...

  • Page 87: Circuit Board (Base Unit_Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15.2. Circuit Board (Base Unit_RF Part) C797 C796 C793 C781 L795 L798 R781 C791 C776 L797 C761 C773 C777 R782 D781 C756 L752 C772 C782 C752 C755 C753 C711 L753 C712 C701 C758 C721 IC701 L721 C722 C714 KX-TG7411/7412 CIRCUIT BOARD (Base Unit_RF Part (Component View))

  • Page 88: Circuit Board (Handset_Main)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15.3. Circuit Board (Handset_Main) 15.3.1. Component View D423 C423 C424 D424 PNLB1094Z KX-TGA740 C577 R578 C566 C575 R580 C578 ANT2 C562 R563 V_BACK LIGHT R562 IC561 (5.0V) RA553 Q561 R560 C568 C564 Q563 C567 C792 L791 R731 C795 R732...
  • Page 89 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15.3.2. Bottom View LEFT RIGHT TALK LED559 LED558 FLASH KX-TGA740 CIRCUIT BOARD (Handset_Main (Bottom View))

  • Page 90: Circuit Board (Handset_Rf Part)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15.4. Circuit Board (Handset_RF Part) C792 L791 R731 R732 C795 ATSTp C775 IC701 R736 R772 C715 D771 L739 C757 R715 R771 L751 C771 C707 C710 L796 C703 C708 L754 C751 C737 C704 C765 C764 C762 C754 C702 C705 C706...

  • Page 91: Circuit Board (Charger Unit)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 15.5. Circuit Board (Charger Unit) 15.5.1. Component View CIRCUIT BOARD (Charger unit (Component View)) 15.5.2. Bottom View TP4 (GND) CIRCUIT BOARD (Charger unit (Bottom View))

  • Page 92: Exploded View And Replacement Parts List

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 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: Cabinet And Electrical Parts (Handset)

    (*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: Cabinet And Electrical Parts (Charger Unit)

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 16.3. Cabinet and Electrical Parts (Charger Unit)

  • Page 95: Accessories And Packing Materials

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 16.4. Accessories and Packing Materials 16.4.1. KX-TG7411MEB...
  • Page 96 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 16.4.2. KX-TG7412MEB...
  • Page 97 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 16.4.3. KX-TGA740MEB...

  • Page 98: Replacement Parts List

    KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 16.5. Replacement Parts List Safety Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) PNGT2424Z NAME PLATE Note: 16.5.1.2. Main P.C. Board Parts The “RTL” marking indicates that its Retention Time is Note: Limited. (*1) When you have replaced IC501, IC611 or X501, make When production is discontinued, this item will con- adjustments.
  • Page 99 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks R161 ERJ3GEYJ104 100k C478 ECUE1H100DCQ 10p R162 ERJ3GEYJ333 C501 ECUE1A104KBQ 0.1 R163 ERJ12YJ120 C503 ECUE1A104KBQ 0.1 R164 ERJ3GEYJ272 2.7k C504 ECUE1A104KBQ 0.1...
  • Page 100 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks L0AD01A00018 RECEIVER L374 G1C100MA0395 COIL PQHG10729Z RUBBER PARTS, RECEIVER L751 ELJRF4N7ZFB COIL PNYE1010Z SPACER, CUSHION LCD L752 MQLRF18NJFB COIL PNBC1267Z1 BUTTON, CURSOL KEY...
  • Page 101 ECUE1C103KBQ 0.01 (*1) You can download and refer to the Operating Instruc- C742 ECUV1A474KBV 0.47 tions (Instruction book) on TSN Server. C743 ECUV1A105KBV 1 C751 F1G1H1R3A561 1.3p 16.5.4.1. KX-TG7411MEB C752 ECUE1H100DCQ 10p C753 F1G1H1R0A561 1p C754 ECUE1A104KBQ 0.1 Safety Ref.
  • Page 102 KX-TG7411MEB/KX-TG7412MEB/KX-TGA740MEB 16.5.4.2. KX-TG7412MEB Safety Ref. Part No. Part Name & Description Remarks A101 PQLV219Z AC ADAPTOR A102 PQJA10075Z CORD, TELEPHONE A103 PNKE1029Z1 HANGER, BELT CLIP ABS-HB A104 PNQX1647Z INSTRUCTION BOOK (*1) P101 PQPH10089Z PROTECTION COVER (for Base Unit) P102 PQPH10088Z...

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