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Panasonic KX-TG6440PK Service Manual

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Telephone Equipment
KX-TG6440PK
Model No.
KX-TGA641S
KX-TGA641T
KX-TGA740B
Expandable Digital Cordless Answering
System
B: Black Version
S: Pearl Silver Version
T: Black Metallic Version
(for U.S.A.)
© Panasonic Communications Co., Ltd. 2009. Unau-
thorized copying and distribution is a violation of law.
ORDER NO. KM40902809CE
F13

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Summary of Contents for Panasonic KX-TG6440PK

  • Page 1 KX-TG6440PK Model No. KX-TGA641S KX-TGA641T KX-TGA740B Expandable Digital Cordless Answering System B: Black Version S: Pearl Silver Version T: Black Metallic Version (for U.S.A.) © Panasonic Communications Co., Ltd. 2009. Unau- thorized copying and distribution is a violation of law.
  • Page 2 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...

  • Page 3: Table Of Contents

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions----------------------------------------------- 4 14.7. Schematic Diagram (Charger Unit) ----------------- 94 1.1. For Service Technicians --------------------------------- 4 15 Printed Circuit Board ------------------------------------------ 95 2 Warning -------------------------------------------------------------- 4 15.1. Circuit Board (Base Unit_Main) ---------------------- 95 2.1.

  • Page 4: Safety Precautions

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 3 Specifications Note: • Design and specifications are subject to change without notice. Note for Service: • Optional headset: KX-TCA60, KX-TCA86, KX-TCA92, KX-TCA93, KX-TCA94 • Operation range: Up to 300 m outdoors, Up to 50 m indoors, depending on the condition.

  • Page 7: Technical Descriptions

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4 Technical Descriptions 4.1. US-DECT Description The frequency range of 1.92 GHz-1.93 GHz is used. Transmitting and receiving carrier between base unit and handset is same fre- quency. Refer to Frequency Table (P.73). 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.2. Block Diagram (Base Unit_Main)

  • Page 10: Block Diagram (Base Unit_Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.3. Block Diagram (Base Unit_RF Part)

  • Page 11: Circuit Operation (Base Unit)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.4. Circuit Operation (Base Unit) General Description: (DSP, Flash Memory) is a digital speech/signal processing system that implements all the functions of speech compression, record and playback, and memory management required in a digital telephone answering machine. 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.4.3.1. Charge Circuit The voltage from the AC adaptor is supplied to the charge circuits.
  • Page 14 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.4.6. Auto Disconnect Circuit Function: This circuit is used to detect the fact that another telephone connected to the same line is OFF-HOOK while the unit is in a receiving status or OGM transmitting status. Circuit Operation: The voltage of pin 90 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 0.2 V or more.
  • Page 17 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.4.7. 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 18 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.4.8. Calling Line Identification (Caller ID)/Call Waiting Caller ID Function: Caller ID 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 19 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B Call Waiting Caller ID Calling Identity Delivery on Call Waiting (CIDCW) is a CLASS service that allows a customer, while off-hook on an existing call, to receive information about a calling party on a waited call. The transmission of the calling information takes place almost immediately after the customer is alerted to the new call so he/she can use this information to decide whether to take the new call.

  • Page 20: Block Diagram (Handset)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.5. Block Diagram (Handset) IC541 ANT2 ANT1 X501 EEPROM 13.824 MHz Q531 CHG_DET CHARGE DETECT Q362, Q364 RF part CHARGE CHG_CTL CONTROL SYN_OUT SYN_EN SYN_CLK RESET SYN_DATA Q361 SLOT_CTROL D361 CHARGE RADIO_EN IC374 TXDATA RXDATA RF_RSTN IC371 2.7 V...

  • Page 21: Block Diagram (Handset_Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.6. Block Diagram (Handset_RF Part)

  • Page 22: Circuit Operation (Handset)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 23 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.7.2. Power Supply Circuit Voltage is supplied separately to each block.
  • Page 24 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 25 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 26: Circuit Operation (Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 27: Circuit Operation (Charger Unit)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 28: Signal Route

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 4.10. Signal Route...
  • Page 29 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B RF part signal route...

  • Page 30: Location Of Controls And Components

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 5 Location of Controls and Components 5.1. Controls 5.1.2. Handset 5.1.1. Base Unit...

  • Page 31: Display

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 5.2. Display...

  • Page 32: Installation Instructions

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 6 Installation Instructions 6.1. Connections 6.2. Battery 6.2.1. Battery Installation...
  • Page 33 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 6.2.2. Battery Charge 6.2.4. Panasonic Ni-MH Battery Performance (supplied batteries) 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 34: Operating Instructions

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 7 Operating Instructions 7.1. Programmable Settings 7.1.1. Programming by Scrolling through the Display Menus...
  • Page 35 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...
  • Page 36 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 7.1.2. Programming using the Direct Commands...
  • Page 37 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...

  • Page 38: Error Messages

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 7.2. Error Messages...

  • Page 39: Troubleshooting

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 7.3. Troubleshooting...
  • Page 40 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...
  • Page 41 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...
  • Page 42 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...

  • Page 43: Test Mode

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 8 Test Mode 8.1. Adjustment and Test Mode Flow Chart 8.1.1. TX-CW Mode for Base Unit Note: (*1) Refer to Check Table for RF part (P.60).
  • Page 44 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 8.1.2. Test Link Mode for Base Unit Note: (*1) Refer to Test Link Mode for Handset (P.48). If you can not proceed to the next step, refer to Registering a Handset to a Base Unit (P.58). (*2) Refer to Check Table for RF part (P.60).
  • Page 45 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 8.1.3. Adjustment Mode for Base Unit Cross Reference Check and Adjust Frequency (Base Unit) (P.70)
  • Page 46 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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.60).
  • Page 47 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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.60).
  • Page 48 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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.58). (*3) for factory use only.
  • Page 49 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 8.1.7. Adjustment Mode for Handset Cross Reference (*1) Adjust Battery Low Detector Voltage (Handset) (P.70) Note: (*2) These are the default values. (*3) These values may not be fixed depending on the battery strength.

  • Page 50: Service Mode

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 9 Service Mode 9.1. How to Clear User Setting Units are reset to the Factory settings by this operation (Erase recorded Voice messages, stored Phone numbers, Caller list and etc.). This operation should not be performed for a usual repair.
  • Page 51 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 9.1.2. 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.

  • Page 52: Troubleshooting Guide

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10 Troubleshooting Guide 10.1. Troubleshooting Flowchart Cross Reference: Note: Check Power (P.53) (*1) When a user claims that the unit disconnects a call right Check Playback (P.55) after the greeting message and no incoming messages can Check Record (P.54) be recorded, this symptom can not be reappeared with TEL Check Battery Charge (P.55)
  • Page 53 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.1. Check Power Cross Reference: Note: Power Supply Circuit (P.12) Flash Memory is IC601. Reset Circuit (P.14) 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.95).
  • Page 54 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.2. Check Record BASE UNIT A) Not record Incoming Message B) How to change the Auto Disconnect activation (time) Some Telephone Company lines (fiber or cable) ON Hook and OFF Hook voltages are lower than conventional lines, which may cause a malfunction of Auto Disconnect detection.
  • Page 55 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.3. Check Playback Cross Reference: Note: Power Supply Circuit (P.12) Flash Memory is IC601. DSP is IC501. (*1) Refer to Circuit Board (Base Unit_Main) (P.95). 10.1.4. Check Battery Charge Note: Flash Memory is IC601. (*1) Refer to Specifications (P.6) for part number and supply voltage of AC adaptor.
  • Page 56 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.5. Check Link Cross Reference: Note: Check the RF part (P.57) Flash Memory is IC601. DSP is IC501. (*1) Refer to Finding out the Defective part (P.57).
  • Page 57 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.6. Check the RF part 10.1.6.1. 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 58 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.6.1.1. Registering a Handset to a Base Unit 10.1.6.1.2. Deregistering a Handset 10.1.6.1.3. Deregistering All Handsets by the Base Unit...
  • Page 59 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.6.2. RF Check Flowchart Each item (1 ~ 6) of RF Check Flowchart corresponds to Check Table for RF part (P.60). Please refer to the each item. Note: (*1) Refer to Things to Do after Replacing IC or X’tal (P.70).
  • Page 60 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.6.3. 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 61 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.6.4. 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 62 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.6.5. 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 IC501 IC701 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 63 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 64 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 10.1.7. Check Handset Transmission Cross Reference: Signal Route (P.28) 10.1.8. Check Handset Reception Cross Reference: Signal Route (P.28) Note: When checking the RF part, Refer to Check the RF part (P.57). 10.1.9. Check Caller ID Cross Reference: Telephone Line Interface (P.15) Calling Line Identification (Caller ID)/Call Waiting Caller ID (P.18)

  • Page 65: Disassembly And Assembly Instructions

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 11 Disassembly and Assembly Instructions 11.1. Disassembly Instructions 11.1.1. Base Unit...
  • Page 66 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B...
  • Page 67 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 11.1.2. Handset...
  • Page 68 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 11.1.3. Charger Unit...

  • Page 69: How To Replace The Handset Lcd

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 11.2. How to Replace the Handset LCD...

  • Page 70: Measurements And Adjustments

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 71: Base Unit Reference Drawing

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 12.2. Base Unit Reference Drawing When connecting the simulator equipment for checking, please refer to below. Oscilloscope AF Volt 6.5V Meter SPN SPP PNLB1089Z CHARGE- KX-TG64/74/84 CHARGE+ L372 RING ANT1_GND IC321 C713 Spectrum Analyzer DCM2 ANT1_H UVCC UGND BCLK...

  • Page 72: Handset Reference Drawing

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 12.3. Handset Reference Drawing When connecting the simulator equipment for checking, please refer to below. D423 C423 C424 D424 PNLB1093Z KX-TGA64X R578 C566 C569 ANT2 R562 R563 C562 C578 R564 RA553 IC561 Q561 R560 C568 C564 Q563 C567 C792...

  • Page 73: Frequency Table

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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...

  • Page 74: Miscellaneous

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 13 Miscellaneous 13.1. CPU Data (Base Unit) 13.1.1. IC501 Description High High_Z 60 KEY_IN6 Key In Description High High_Z 61 KEY_IN5 Key In GNDPA 62 KEY_IN4 Key In SPOUTP 63 KEY_IN3 Key In BCLK 64 KEY_IN2 Key In TXMOD...

  • Page 75: Cpu Data (Handset)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 76: Explanation Of Ic Terminals (Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 13.3. Explanation of IC Terminals (RF Part) IC701 13.3.1.

  • Page 77: How To Replace The Flat Package

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 78 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 79: How To Replace The Llp

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 80 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 81 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 82: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 13.6. Terminal Guide of the ICs, Transistors and Diodes 13.6.1. Base Unit 13.6.2. Handset 13.6.3. Charger Unit...

  • Page 83: Schematic Diagram

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 14 Schematic Diagram 14.1. For Schematic Diagram 14.1.1. Base Unit (Schematic Diagram (Base Unit_Main)) 14.1.1.1. Acoustic Testing Mode 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 84: Schematic Diagram (Base Unit_Main)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 14.2. Schematic Diagram (Base Unit_Main) 3.0V RF Interface IC321 L382 V_PA V_PA VOUT1 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 85 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 7.5 ~ 6.5V (+6.7V) 3.3V IC331 D341 VOUT REFERENCE 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 86: Schematic Diagram (Base Unit_Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 87 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 3.0V V_RF C721 J100p BCLK SYN_OUT R731 SYN_EN R732 SYN_CLK SYN_DATA VCC_VCO SLOT_CTRL SYN_CLK 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 L739 L753 4.7n RF_RSTN 3.0V...

  • Page 88: Schematic Diagram (Base Unit_Operation)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 14.4. Schematic Diagram (Base Unit_Operation) 2APVCC LED902 MEG_LED LED901 ANS_LED KEYS_B KEYIN1 KEYIN2 KEYIN3 MEMO KEYS_C KEYS_D KEYS_E ERASE ANS2 MSG2 MSG1 SKIP STOP DOWN LOCAT/INT MUTE CONF LED904 SP_LED KEYIN4 KEYIN5 KEYIN6 KEYS_A HOLD REDIAL R901 MIC+ R902...
  • Page 89 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B Memo...

  • Page 90: Schematic Diagram (Handset_Main)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 14.5. Schematic Diagram (Handset_Main) RF circuit BCLK R540 BCLK C540 K0.1 TX_DATA TX_DATA SLOT_CTRL SLOT_CTRL RX_DATA RX_DATA RF control line DVCC RADIO_EN RF_RSTN RF_RSTN 2.7V 3.1V SYN_DATA X501 SYN_DATA NCC519 SYN_EN C515 13.824M 3.1V SYN_EN IC546 K0.1 SYN_CLK R501...
  • Page 91 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 NC 50mVp-p/600 CN431 L431 L432 HEADSET_JACK L434 C435 Headset RX 10uF 170mVp-p/150 (Vol. Max) Analog GND RA403 RECEIVER...

  • Page 92: Schematic Diagram (Handset_Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 14.6. 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 93 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 2.7V V_RF C721 J100p BCLK SYN_OUT R731 SYN_EN R732 SYN_CLK SYN_DATA SLOT_CTRL VCC_VCO SYN_CLK 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 DVCC L739 L753 4.7n RF_RSTN 3.1V...

  • Page 94: Schematic Diagram (Charger Unit)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 14.7. Schematic Diagram (Charger Unit) R1 10 SCHEMATIC DIAGRAM (Charger Unit)

  • Page 95: Printed Circuit Board

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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 96 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 15.1.2. Bottom View BCLK Digital Vcc V_RF 13.824MHz (DVCC) 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 97: Circuit Board (Base Unit_Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 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-TG6440...

  • Page 98: Circuit Board (Base Unit_Operation)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 15.3. Circuit Board (Base Unit_Operation) MIC- C901 MIC+ R901 R902 KEYS_E KEYS_D KEYS_C KEYIN3 KEYIN2 KEYIN1 KEYS_A KEYS_B KEYIN6 ANS_LED KEYIN5 MEG_LED KEYIN4 2APVCC SP_LED KX-TG6440 CIRCUIT BOARD (Base Unit_Operation (Component View))

  • Page 99: Circuit Board (Handset_Main)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 15.4. Circuit Board (Handset_Main) 15.4.1. Component View D423 C423 C424 D424 PNLB1093Z KX-TGA64X R578 C566 C569 ANT2 R562 R563 C562 V_BACK LIGHT C578 R564 (5.0V) RA553 IC561 Q561 R560 C568 C564 Q563 C567 C792 L791 R731 R732 C795 ATSTp...
  • Page 100 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 15.4.2. Bottom View LEFT MENU RIGHT TALK LED558 LED559 DOWN FLASH KX-TGA641 CIRCUIT BOARD (Handset_Main (Bottom View))

  • Page 101: Circuit Board (Handset_Rf Part)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 15.5. 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 102: Circuit Board (Charger Unit)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 15.6. Circuit Board (Charger Unit) 15.6.1. Component View CIRCUIT BOARD (Charger Unit (Component View)) 15.6.2. Bottom View TP4 (GND) CIRCUIT BOARD (Charger Unit (Bottom View))

  • Page 103: Exploded View And Replacement Parts List

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 16 Exploded View and Replacement Parts List 16.1. Cabinet and Electrical Parts (Base Unit) Note: (*1) Refer to the spacer (No. 109) of Cabinet and Electrical Parts (Handset) (P.104).

  • Page 104: Cabinet And Electrical Parts (Handset)

    (*1) This cable is fixed by welding. Refer to How to Replace the Handset LCD (P.69). (*2) The rechargeable Ni-MH battery (HHR-4DPA) is available through sales route of Panasonic. (*3) Attach the SPACER (No. 123) to the exact location described above.

  • Page 105: Cabinet And Electrical Parts (Charger Unit)

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 16.3. Cabinet and Electrical Parts (Charger Unit) 16.4. Accessories...

  • Page 106: Replacement Parts List

    KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 16.5. Replacement Parts List Safety Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) PNHR1001Z GUIDE, BUTTON HOLDER PS-HB Note: PNBC1001Z2 BUTTON, MESSAGE AS-HB PNJK1046Z KEYBOARD SWITCH, TAM The “RTL” marking indicates that its Retention Time is...
  • Page 107 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks (RESISTORS) C172 ECUE1H102KBQ 0.001 R111 PQ4R10XJ104 100k C173 ECUV1A224KBV 0.22 R112 PQ4R10XJ104 100k C176 PQCUV0J106KB 10 R113 ERJ3GEYJ103 C178 ECUE1C223KBQ 0.022...
  • Page 108 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks C771 ECUE1H100DCQ 10p PNKF1053Z2 CABINET COVER (for KX- ABS-HB TGA641S) C772 ECUE1H330JCQ 33p PNKF1053Z1 CABINET COVER (for ABS-HB C773 ECUE1H100DCQ 10p...
  • Page 109 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks L752 MQLRF18NJFB COIL C422 ECUE0J105KBQ 1 L753 ELJRF4N7ZFB COIL C433 ECUE1E682KBQ 0.0068 L754 MQLRF5N6ZFB COIL C435 PQCUV0J106KB 10 F301 PQLQR2M5N6K COIL...
  • Page 110 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 16.5.5. Screws Safety Ref. Part No. Part Name & Description Remarks MIC100 L0CBAY000032 MICROPHONE E101 L5DYBYY00001 LIQUID CRYSTAL DISPLAY Safety Ref. Part No. Part Name & Description Remarks (*3) E102 PNHR1107Z TRANSPARENT PLATE, LCD PMMA-HB XTB26+8GFJ TAPPING SCREW E103...
  • Page 111 B: Black Version S: Pearl Silver Version T: Black Metallic Version (for U.S.A.) Please file and use this supplement manual together with the service manual for Model No. KX-TG6440PK/ KX-TGA641S/KX-TGA641T/KX-TGA740B, Order No. KM40902809CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1.
  • Page 112 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 1 REPLACEMENT PARTS LIST 1.1. REFERENCE CHART Reason for Change *The following items (1-8) indicate the reason for change. See the “Notes” column for each part in ORIGINAL AND NEW PARTS COMPARISON LISTS. 1. Improve performance Remark: *a: Performance Improvement.
  • Page 113 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 1.3. Cabinet and Electrical Parts (Base Unit) [Changed from original section “16.1. Cabinet and Electrical Parts (Base Unit)”] KXTG6440PK KXTGA641S KXTGA641T KXTGA740B...
  • Page 114 B: Black Version S: Pearl Silver Version T: Black Metallic Version (for U.S.A.) Please file and use this supplement manual together with the service manual for Model No.KX-TG6440PK/ KX-TGA641S/KX-TGA641T/KX-TGA740B, Order No.KM40902809CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1.
  • Page 115 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 1 REPLACEMENT PARTS LIST 1.1. REFERENCE CHART Reason for Change *The following items (1-8) indicate the reason for change. See the “Notes” column for each part in ORIGINAL AND NEW PARTS COMPARISON LISTS. 1. Improve performance Remark: *c : To share the parts with other models.
  • Page 116 B: Black Version S: Pearl Silver Version T: Black Metallic Version (for U.S.A.) Please file and use this supplement manual together with the service manual for Model No.KX-TG6440PK/ KX-TGA641S/KX-TGA641T/KX-TGA740B, Order No. KM40902809CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1.
  • Page 117 KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B 1 REPLACEMENT PARTS LIST 1.1. REFERENCE CHART Reason for Change *The following items (1-8) indicate the reason for change. See the “Notes” column for each part in ORIGINAL AND NEW PARTS COMPARISON LISTS. 1. Improve performance Remarks: *j : To meet the standards.

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