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Panasonic KX-TG4753B Service Manual

Digital cordless answering system
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See also: Manual
KX-TGA470B
(Handset)
(Charger Unit)
Configuration for each model
Model No
Base Unit Handset Charger Unit Range Extender Expandable
KX-TG4753 1 (TG4731) 3 (TGA470)
KX-TGA470*
1 (TGA470)
*KX-TGA470 is also an optional accessory, which contains a
handset and a charger.
KX-TG4731B
(Base Unit)
(Range Extender)
2
1
Up to 6
1
Telephone Equipment
KX-TG4753B
Model No.
KX-TGA470B
KX-TGA405B
Digital Cordless Answering System
B: Black Version
(for U.S.A.)
© Panasonic System Networks Co., Ltd. 2012
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KM41201527CE
F13

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Summary of Contents for Panasonic KX-TG4753B

  • Page 1 KX-TG4753 1 (TG4731) 3 (TGA470) Up to 6 KX-TGA470* 1 (TGA470) *KX-TGA470 is also an optional accessory, which contains a handset and a charger. © Panasonic System Networks Co., Ltd. 2012 Unauthorized copying and distribution is a violation of law.
  • Page 2 KX-TG4753B/KX-TG470B/KX-TGA405B WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians.

  • Page 3: Table Of Contents

    KX-TG4753B/KX-TG470B/KX-TGA405B TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions----------------------------------------------- 4 15.2. Circuit Board (Base Unit_Operation)---------------- 87 1.1. For Service Technicians --------------------------------- 4 15.3. Circuit Board (Handset_Main) ------------------------ 89 2 Warning -------------------------------------------------------------- 4 15.4. Circuit Board (Handset_LED) ------------------------- 91 2.1. Battery Caution--------------------------------------------- 4 15.5.

  • Page 4: Safety Precautions

    KX-TG4753B/KX-TG470B/KX-TGA405B 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 prevent fires, injury or electric shock, which can be caused by improper repair work.

  • Page 5: Discarding Of P. C. Board

    KX-TG4753B/KX-TG470B/KX-TGA405B 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 manufacturer's specific instructions for the melting points of their products and any precautions for using their product with other materials.

  • Page 6: Specifications

    KX-TG4753B/KX-TG470B/KX-TGA405B 3 Specifications ■ ■ Standard: Bit rate: DECT 6.0 (Digital Enhanced Cordless 1,152 kbit/s Telecommunications 6.0) ■ Modulation: ■ Number of channels: GFSK (Gaussian Frequency Shift Keying) 60 Duplex Channels ■ RF transmission power: ■ Frequency range: 115 mW (max.) 1.92 GHz to 1.93 GHz...

  • Page 7: Technical Descriptions

    KX-TG4753B/KX-TG470B/KX-TGA405B 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 frequency. Refer to Frequency Table (P.66). 4.1.1. TDD Frame Format 5 ms 5 ms Up Link ( Handset - >...
  • Page 8 KX-TG4753B/KX-TG470B/KX-TGA405B 4.1.3. Signal Flowchart in the Radio Parts Reception Base unit: A voice signal from TEL line is encoded to digital data and converted into a 1.9GHz modulated radio signal by BBIC(IC501). The RF signal, after which is amplified in BBIC, is fed to selected antenna.

  • Page 9: Block Diagram (Base Unit_Main)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.2. Block Diagram (Base Unit_Main)

  • Page 10: Block Diagram (Base Unit_Rf Part)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.3. Block Diagram (Base Unit_RF Part) ANT2 ANT2 ANT1 DA801 TXON RXON ANT1 KX-TG4753 BLOCK DIAGRAM (Base Unit_RF Part)

  • Page 11: Circuit Operation (Base Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.4. Circuit Operation (Base Unit) General Description: (BBIC, Flash Memory, EERROM) 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 BBIC system is fully controlled by a host processor. The host processor provides activation and control of all that functions as follows.
  • Page 12 KX-TG4753B/KX-TG470B/KX-TGA405B 4.4.4. Power Supply Circuit/Reset Circuit The power supply voltage from AC adaptor is converted to VBAT (3.0V) in IC302. And +3.0V for peripherals and analog part is insulated from VBAT by Doubler of BBIC. Circuit Operation: +3.0V VBAT IC601...

  • Page 13: Charge Circuit

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.4.4.1. Charge Circuit The voltage from the AC adaptor is supplied to the charge circuits. +5.5V F301 CHARGE+ CHARGE-...
  • Page 14 KX-TG4753B/KX-TG470B/KX-TGA405B 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 15 KX-TG4753B/KX-TG470B/KX-TGA405B 4.4.6. Parallel Connection Detect Circuit/Auto Disconnect 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 connected in parallel is on hook or off hook by detecting changes in the T/R voltage.
  • Page 16 KX-TG4753B/KX-TG470B/KX-TGA405B 4.4.7. 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 17 KX-TG4753B/KX-TG470B/KX-TGA405B 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 18: Block Diagram (Handset)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.5. Block Diagram (Handset) VBAT ANT1 EEPROM 13.824 MHz VBAT CHG_DET RF part CHG_CTL RXON RSTN RESET TXON CHARGE VBAT BATTERY BBIC Receiver HSSPOUTP Headset Jack LOUT HSMIP 4.0V CN431 VBAT CHARGE HEADSET_DET (KEY) CP_OFF PUMP (BELL) KEY_LED BELL_LED...

  • Page 19: Block Diagram (Handset_Rf Part)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.6. Block Diagram (Handset_RF Part) TXON DA801 RXON KX-TGA470 BLOCK DIAGRAM (Handset_RF Part)

  • Page 20: Circuit Operation (Handset)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.7. Circuit Operation (Handset) 4.7.1. Outline Handset consists of the following ICs as shown in Block Diagram (Handset) (P.18). • DECT BBIC (Base Band IC): IC1 - All data signals (forming/analyzing ACK or CMD signal) - All interfaces (ex: Key, Detector Circuit, Charge, EEPROM, LCD) •...

  • Page 21: Circuit Operation (Charger Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.7.3. Charge Circuit Circuit Operation: When charging the handset on the Base Unit, the charge current is as follows; DC+(6.5 V) → F301 → R371 → R372 →CHARGE+(Base) → CHARGE+(Handset) → Q4 → D7→ F1 → BATTERY+... Battery... BATTERY- → R45 → GND → CHARGE-(Handset)→ CHARGE-(Base) → GND → DC-(GND) In this way, the BBIC on Handset detects the fact that the battery is charged.

  • Page 22: Block Diagram (Range Extender_Main)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.9. Block Diagram (Range Extender_Main) ANT1 ANT2 RF_PART ANT1 ANT2 IC302 3.0 V RXON VBAT IC501 REGULATOR BBIC VBAT_APU VCC_IF DC JACK VCC_FE TXON VCC_VCO RESET RSTN IC611 EEPROM VBAT MEMORY KX-TGA405 BLOCK DIAGRAM (Range Extender_Main) 4.10. Block Diagram (Range Extender_RF Part)

  • Page 23: Circuit Operation (Range Extender)

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.11. Circuit Operation (Range Extender) (BBIC, EEPROM) is a digital speech/signal processing system. The BBIC system is fully controlled by a host processor. The host processor provides activation and control of all that functions as follows. TDD & TDMA...

  • Page 24: Power Supply Circuit

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.11.3. Power Supply Circuit The power supply voltage from AC adaptor is converted to VBAT (3.0 V) in IC302. VBAT is used for BBIC and all peripherals. Circuit Operation: VBAT IC501 IC302 VBAT 6.5V pin 10 3.0V AC Adaptor...

  • Page 25: Signal Route

    KX-TG4753B/KX-TG470B/KX-TGA405B 4.12. Signal Route ROUTE SIGNAL ROUTE HANDSET TX HANDSET MIC - R73/74 - C11/13 - RA4 - IC1(22/23) - <HANDSET_RF_TX_ROUTE> - ANT. --- ---ANT. - <BASE_UNIT_RF_RX_ROUTE> - IC501(46/47 - 28) - C184 - Q161 - Q141 - D101 - L101/[L102 - P101] - T/R(TEL LINE)
  • Page 26 KX-TG4753B/KX-TG470B/KX-TGA405B RF part signal route SIGNAL ROUTE ROUTE HANDSET RF IC1(44/45) - L809 - C812 - DA801 - C803 - C801 - ANT [ TX_ROUTE ] HANDSET RF ANT - C801 - C803 - DA801 - C826 - IC1(46/47) [ RX_ROUTE ]...

  • Page 27: Location Of Controls And Components

    KX-TG4753B/KX-TG470B/KX-TGA405B 5 Location of Controls and Components Refer to the Operating Instructions. Note: You can download and refer to the Operating Instructions (Instruction book) on TSN Server. 6 Installation Instructions Refer to the Operating Instructions. Note: You can download and refer to the Operating Instructions (Instruction book) on TSN Server.

  • Page 28: Test Mode

    KX-TG4753B/KX-TG470B/KX-TGA405B 8 Test Mode 8.1. Engineering Mode 8.1.1. Base Unit Important: Make sure the address on LCD is correct when entering new data. Otherwise, you may ruin the unit. Soft keys {FLASH} {FLASH} {CALL WAIT} {CALL WAIT} Naviga tor key/...
  • Page 29 KX-TG4753B/KX-TG470B/KX-TGA405B Frequently Used Items (Base Unit) ex.) Items Address Default Data New Data Remarks Frequency 00 07 / 00 08 00/01 Use these items in a READ-ONLY mode to confirm the contents. Careless rewriting may 00 02 ~ 00 06 Given value cause serious damage to the computer system.
  • Page 30 KX-TG4753B/KX-TG470B/KX-TGA405B 8.1.2. Handset Important: Make sure the address on LCD is correct when entering new data. Otherwise, you may ruin the unit. Soft keys {FLASH} {FLASH} {CALL WAIT} {CALL WAIT} Naviga tor key/ (Volume) key {OFF} {OFF} Dial keypad Dial keypad...
  • Page 31 KX-TG4753B/KX-TG470B/KX-TGA405B Frequently Used Items (Handset) ex.) Items Address Default Data New Data Possible Adjusted Possible Adjusted Remarks Value MAX (hex) Value MIN (hex) Battery Low 00 12/00 13 00 / 00 (*2) Frequency 00 07 / 00 08 00 / 01...

  • Page 32: Service Mode

    KX-TG4753B/KX-TG470B/KX-TGA405B 9 Service Mode 9.1. How to Clear User Setting (Handset Only) Handset Press simultaneously until a beep sound is heard. Then single handset is initialized. (The contents of user setting are reset to factory default) *Usage time is not cleared.

  • Page 33: Troubleshooting Guide

    KX-TG4753B/KX-TG470B/KX-TGA405B 10 Troubleshooting Guide 10.1. Troubleshooting Flowchart 10.1.1. Flow Chart (without Range Extender) FLOW CHART Not working Power ON Base Unit Check Power Not playback Playback Pre-Message Check Playback Not record (*1) Record Check Record Link No link No charge...

  • Page 34: Check Power

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.2. Flow Chart (Range Extender) Not working Power ON Range Extender Check Power Power ON with pressing "1", "6" and "#" of Handset Not Link Link Check Link Range Check the RF part Cross Reference: Check Link (P.41) Check Power (P.34) Check the RF part (P.42)

  • Page 35: Check Record

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.3.2. Handset Is the battery inserted to BATT+ and BATT-? Check the battery and around BATT+ and Is the voltage of TP-VBAT 2.3 V more? BATT- are not shorted. Is the voltage of TP 3.0 V about 3.0 V? Check Power Supply Circuit/Reset Circuit.
  • Page 36 KX-TG4753B/KX-TG470B/KX-TGA405B <How to change the Auto Disconnect activation time and VOX level> A) 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. To solve this problem, try changing the Auto Disconnect activation through the procedures below.
  • Page 37 KX-TG4753B/KX-TG470B/KX-TGA405B B) Vox level: It makes easier to detect a small voice (caller) by raising the sensitivity of VOX level. Therefore, the recording of TAM is not turned off during a detection. 1) ~ 2) are same as (A). 3) Press "5","1","1".

  • Page 38: Check Playback

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.5. Check Playback 10.1.5.1. Base Unit Check VDDC (1.2 V): Test Point [VDDC] Check Power Supply Circuit. Check output of BBIC (Pin 29, 31). Check BBIC and Flash Memory. Check Speaker and its surroundings. Cross Reference: Note: Power Supply Circuit/Reset Circuit (P.12) Flash Memory is IC601.

  • Page 39: Check Link

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.7. Check Link 10.1.7.1. Base Unit Does Base Unit make link with normal working Base Unit is OK. Check Handset. Handset? Is the voltage of VBAT about 3.0 V? Check around Power Supply Circuit. Is the voltage of VDDC about 1.2 V? Adjust +3.0V voltage to 3.0 V.
  • Page 40 KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.7.2. Handset Does Handset make link with Base Unit? Handset is OK. Check Base Unit. (Correct working unit) Is the voltage of TP VBAT about 2.2~2.8 V? Check the batteries. Check around Power Supply Circuit/Reset Circuit. Is the voltage of TP VDDC about 1.2 V? Is the voltage of TP 3.0 V about 3.0 V?
  • Page 41 KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.7.3. Range Extender Does Range Extender make link with normal working Range Extender in OK. Check Base Unit and Base Unit and Handset? Handset. Is the voltage of VBAT about 3.0 V? Check around Power Supply Circuit. Is the voltage of VDDC about 1.2 V? Adjust +3.0V voltage to 3.0 V.

  • Page 42: Check The Rf Part

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.8. Check the RF part 10.1.8.1. Finding out the Defective part Prepare Regular HS (*1) and Regular BU (*2) and Regular RE (*3). Handset is Power ON with “1“, “6“and “#“. START HS is defective Use Regular HS BU is defective...
  • Page 43 KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.8.2. RF Check Flowchart Each item (1 ~ 5) of RF Check Flowchart corresponds to Check Table for RF part (P.44). Please refer to the each item. Start Link Control Check BBIC interface parts. confirmation signal (RF Block <->BBIC on BU/HS P.C.B)
  • Page 44 KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.8.3. 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 45 KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.8.5. 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 46: Registering A Handset To The Base Unit

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.9. Registering a Handset to the Base Unit The supplied handset and base unit are pre-registered. If for some reason the handset is not registered to the base unit, re-register the handset. 1 Handset: {MENU} i # 1 3 0...

  • Page 47: Check Handset Transmission

    KX-TG4753B/KX-TG470B/KX-TGA405B 10.1.12. Check Handset Transmission Check MIC of handset. Check handset Tx in Signal Route. Cross Reference: Signal Route (P.25) 10.1.13. Check Handset Reception Check speaker of handset. Check handset Rx in Signal Route. Cross Reference: Signal Route (P.25) Note: When checking the RF part, Refer to Check the RF part (P.42).

  • Page 48: Disassembly And Assembly Instructions

    KX-TG4753B/KX-TG470B/KX-TGA405B 11 Disassembly and Assembly Instructions 11.1. Disassembly Instructions 11.1.1. Base Unit Remove the 4 screws to remove the cabinet cover. Remove the solders. Cabinet cover Solders Remove the screw and pararell wire to remove the main P.C. board.
  • Page 49 KX-TG4753B/KX-TG470B/KX-TGA405B Remove the 2 screws to remove the Jack holder. Remove the 2 screws to remove the operational P.C.B board.
  • Page 50 KX-TG4753B/KX-TG470B/KX-TGA405B 11.1.2. Handset 2 screws Remove the 2 screws. Insert a plastic card. (Ex. Used SIM card etc.) Cabinet body between the cabinet body and the cabinet cover, then pull it along the gap to open the cabinet. Cabinet cover Likewise, open the other side of the cabinet.

  • Page 51: Charger Unit

    KX-TG4753B/KX-TG470B/KX-TGA405B 11.1.3. Charger Unit 2 charge terminals...
  • Page 52 KX-TG4753B/KX-TG470B/KX-TGA405B 11.1.4. Range Extender...

  • Page 53: How To Replace The Base Unit Lcd

    KX-TG4753B/KX-TG470B/KX-TGA405B 11.2. How to Replace the Base Unit LCD Fit the heatseal of a new LCD. Vertical Interval Tolerance 0.2mm New LCD Horizontal Interval Tolerance 0.2mm If interval tolerance between center lines is less than 0.2 mm, it is o.k.
  • Page 54 KX-TG4753B/KX-TG470B/KX-TGA405B Attach the LCD and fix by hook A (two points).

  • Page 55: How To Replace The Handset Lcd

    KX-TG4753B/KX-TG470B/KX-TGA405B 11.3. How to Replace the Handset LCD Note: The illustrations are simplified in this page. They may differ from the actual product. P. C. board Vertical Interval Tolerance Peel off the FFC (Flexible Flat Cable) from 0.2 mm the LCD, in the direction of the arrow. Take care to ensure that the foil on the P.C.

  • Page 56: Measurements And Adjustments

    KX-TG4753B/KX-TG470B/KX-TGA405B 12 Measurements and Adjustments This chapter explains the measuring equipment, the JIG connection, and the PC setting method necessary for the measurement in Troubleshooting Guide (P.33) 12.1. Equipment Required • Digital multi-meter (DMM): it must be able to measure voltage and current.
  • Page 57 KX-TG4753B/KX-TG470B/KX-TGA405B 12.2.2. Connections (Handset) Connect the DC Power or Battery to BATT+ and BATT-. Connect the JIG cable GND (black) to GND. Connect the JIG cable UTX (yellow) to UTX and URX (red) to URX. URX (red) To Serial Port...
  • Page 58 KX-TG4753B/KX-TG470B/KX-TGA405B 12.2.4. How to install Batch file into P.C. Insert the Batch file CD-ROM into CD-ROM drive and copy PNZZTG**** folder to your PC (example: D drive). <Example for Windows> On your computer, click [Start], select Programs Open an MS-DOS mode window.
  • Page 59 KX-TG4753B/KX-TG470B/KX-TGA405B 12.2.5. Commands (Base Unit) See the table below for frequently used commands. Command name Function Example rdeeprom Read the data of EEPROM Type “rdeeprom 00 00 FF”, and the data from address “00 00” to “FF” is read out.

  • Page 60: Adjustment Standard (Base Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 12.3. Adjustment Standard (Base Unit) When connecting the simulator equipment for checking, please refer to below. 12.3.1. Bottom View Note: (*1) is referred to No.2 of Check Check Table for RF part (P.44) (*2) is referred to Power Supply Circuit/Reset Circuit (P.12)

  • Page 61: Adjustment Standard (Charger Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 12.4. Adjustment Standard (Charger Unit) When connecting the simulator equipment for checking, please refer to below. 12.4.1. Bottom View Digital Volt Meter /2 W DC POWER DC 5.5 V...

  • Page 62: Adjustment Standard (Range Extender)

    KX-TG4753B/KX-TG470B/KX-TGA405B 12.5. Adjustment Standard (Range Extender) When connecting the simulator equipment for checking, please refer to below. 12.5.1. Bottom View Spectrum Analyzer Frequency Counter * Send command "SFR", then the frequency output on this TP. Oscilloscope (*1) * Start Monitor Note: (*1) is referred to Power Supply Circuit (P.24)

  • Page 63: Adjustment Standard (Handset)

    KX-TG4753B/KX-TG470B/KX-TGA405B 12.6. Adjustment Standard (Handset) When connecting the simulator equipment for checking, please refer to below. 12.6.1. Component View LED11 LED10 LED12 ANT_TP C801 RESET C804 C802 C814 C812 C813 C810 C822 C820 R807 C805 C806 ATSTP CKM/STM GND_J RSTN C96 C97 3.0V...

  • Page 64: Things To Do After Replacing Ic Or X'tal

    KX-TG4753B/KX-TG470B/KX-TGA405B 12.7. Things to Do after Replacing IC or X'tal If repairing or replacing EEPROM and X'tal, it is necessary to download the required data such as Programming data or adjustment data, etc in memory. The set doesn't operate if it is not executed.
  • Page 65 KX-TG4753B/KX-TG470B/KX-TGA405B 12.7.1.3. Handset First, operate the PC setting according to The Setting Method of JIG (P.56). Then download the appropriate data according to the following procedures. Items How to download/Required adjustment EEPROM (IC3) Adjusted parameter data is stored in memory.

  • Page 66: Frequency Table

    KX-TG4753B/KX-TG470B/KX-TGA405B 12.8. 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 67: Miscellaneous

    KX-TG4753B/KX-TG470B/KX-TGA405B 13 Miscellaneous 13.1. How to Replace the LLP (Leadless Leadframe Package) IC Note: This description is only applied on the model with Shield case. 13.1.1. 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.
  • Page 68 KX-TG4753B/KX-TG470B/KX-TGA405B 13.1.4. 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. Soldering Iron Land Solder P.C.Board 2. Place the solder a little on the land where IC pins are to be attached, then place the IC.

  • Page 69: How To Replace The Flat Package Ic

    KX-TG4753B/KX-TG470B/KX-TGA405B 13.2. How to Replace the Flat Package IC Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
  • Page 70 KX-TG4753B/KX-TG470B/KX-TGA405B 13.2.3. 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: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG4753B/KX-TG470B/KX-TGA405B 13.3. Terminal Guide of the ICs, Transistors and Diodes 13.3.1. Base Unit (Reverse View) 2SC6054JSL PNWI1TG4731H B1ACGP000008 C0DBEYY00102 C2HBCY000080 PNWI2TG4731H B1ABDM000001 Cathode Anode DA2J10100L DSC7003S0L PSVTUMG11NTR PQVDMD5S PQVDPTZT2530 Cathode Cathode Cathode Anode Anode Anode B3AAB0000347 B0ECKM000008 B0DDCD000001 LNJ237W82RA 13.3.2. Handset...
  • Page 72 KX-TG4753B/KX-TG470B/KX-TGA405B 13.3.4. Range Extender Cathode (Reverse View) Anode B0DDCD000001 C0CBAYG00016 C2HBCY000046 PNWITG405BR B1GFCFEN0011 Cathode Cathode Anode Anode LNJ237W82RA LNJ308G8JRA...

  • Page 73: Schematic Diagram

    KX-TG4753B/KX-TG470B/KX-TGA405B 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. Important Safety Notice: Components identified by mark have special characteristics important for safety.

  • Page 74: Schematic Diagram (Base Unit_Main)

    KX-TG4753B/KX-TG470B/KX-TGA405B 14.2. Schematic Diagram (Base Unit_Main) ANT1 R807 RXON C822 C827 C892 ANT1 W 0.2mm W 0.15mm 1st layer L 20mm 3rd layer C894 C826 W 0.2mm L 10mm C820 1st layer 1.5p DA801 ANT2 C805 C895 L809 C812 2.7p 7.5n...
  • Page 75 KX-TG4753B/KX-TG470B/KX-TGA405B VCCA +3.0V Q141 REFERENCE R160 1XX : TEL LINE 3XX : POWER, CHARGE 4XX : MIC, SP Q161 5XX : BBIC R141 6XX : FLASH, EEPROM, KEY, LCD 7XX : FOR DK/BT 100k 8XX : RF C165 C163 C173...

  • Page 76: Schematic Diagram (Base Unit_Operation)

    KX-TG4753B/KX-TG470B/KX-TGA405B 14.3. Schematic Diagram (Base Unit_Operation) LED905 R901 R902 LED906 *LED911 R903 LED907 CELL1_LED(R) *LED916 R904 LED908 BT_HS_LED(G) *LED915 BT_HS_LED(R) LED902 MEG_LED LED901 ANS_LED LCD_BLT CN901 LCD_GND 10pin:TG4731 13pin:TG7731 C901 LCD_RST /RSTB LCD_CS /CSB LCD_CD LCD_SID LCD_SCL SCLK LCD_VDD VDD1...
  • Page 77 KX-TG4753B/KX-TG470B/KX-TGA405B Memo...

  • Page 78: Schematic Diagram (Handset_Main)

    KX-TG4753B/KX-TG470B/KX-TGA405B 14.4. Schematic Diagram (Handset_Main) Charge Current VBAT VBAT BAT+ 2.5A BAT- Battery CHG_CUR When on Charge CP3V 0.1u 3.3k EEP_WP EEP_WP E_WP EEP_SCL EEP_SCL E_SCL 1000p EEP_SDA EEP_SDA E_SDA CHG+ *IC3 CHG+ * Start Monitor CHARGE * When "SFR" command...
  • Page 79 KX-TG4753B/KX-TG470B/KX-TGA405B RF BLOCK ANT-Short-GND R807 ANT-Short RXON W 0.15mm ANT-Pattern L 20mm W 0.15mm/L 7mm 3rd layer W 0.5mm /L 5mm C826 1st layer RX_RF C803 1.3p C812 L809 8.2n DA801 W 0.15mm TX_RF L 20mm 3rd layer W 0.2mm R806 L 10.0mm...

  • Page 80: Schematic Diagram (Handset_Led)

    KX-TG4753B/KX-TG470B/KX-TGA405B 14.5. Schematic Diagram (Handset_LED) KX-TGA470 SCHEMATIC DIAGRAM (Handset_LED)

  • Page 81: Schematic Diagram (Charger Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 14.6. Schematic Diagram (Charger Unit) 1 (0.5W) 1 (0.5W) SCHEMATIC DIAGRAM (Charger Unit)

  • Page 82: Schematic Diagram (Range Extender)

    KX-TG4753B/KX-TG470B/KX-TGA405B 14.7. Schematic Diagram (Range Extender) ANT2 R807 C892 RXON ANT1 C822 C827 W 0.2mm W 0.15mm L 20mm 1st layer 3rd layer C894 C826 C820 1.5p ANT2 DA801 C805 C812 C895 L809 2.7p 1.2p 7.5n 0.9p DA802 C893 C896...
  • Page 83 KX-TG4753B/KX-TG470B/KX-TGA405B +6.5V +6.5V F301 *JJ301 0 3.0A DCDC_OUT DC/DC CONVERTOR *JJ302 *Q301 *L301 *D371 VBAT VBAT IC302 2 VOUT1 INPUT VOUT2 ON/*OFF VOUT *IC301 X501 13.824M *R371 +3.0V R509 +3.0V *D372 *JJ371 VBAT VCCA VREF VCCA C505 GPIO26 VCCA VREF...
  • Page 84 KX-TG4753B/KX-TG470B/KX-TGA405B Memo...

  • Page 85: Printed Circuit Board

    KX-TG4753B/KX-TG470B/KX-TGA405B 15 Printed Circuit Board 15.1. Circuit Board (Base Unit_Main) 15.1.1. Component View C894 ANT1 C306 ANT2 C343 L101 L102 SA101 R321 R322 KX-TG474x/473xH P101 PNLB2013Z C341 C342 D101 SA102 DA802 X501 R891 R806 C509 C508 R509 MSG_LED KEYS_E ANS_LED...
  • Page 86 KX-TG4753B/KX-TG470B/KX-TGA405B 15.1.2. Bottom View For JIG ANT1 ANT2 UGND KX-TG474x/473xH C301 VBAT PNLB2013Z VBAT F301 R331 R332 3.0A C115 R115 +5.5V C331 C121 C122 R111 R122 C112 C510 C514 C457 VCCA C511 C458 C512 VREF C530 Q111 C513 L661 C461...

  • Page 87: Circuit Board (Base Unit_Operation)

    KX-TG4753B/KX-TG470B/KX-TGA405B 15.2. Circuit Board (Base Unit_Operation) LED901 R901 C903 R903 LED907 LED905 ERASE R904 R902 LED908 LED906 C902 C901 STOP LOCAT/INT MSG1 MSG2 TG773xH LED902 SKIP TG473xH MSG4 MSG3 PNLB2049Z DOWN KX-TG4753 CIRCUIT BOARD (Base Unit_Operation (Component View))
  • Page 88 KX-TG4753B/KX-TG470B/KX-TGA405B Memo...

  • Page 89: Circuit Board (Handset_Main)

    KX-TG4753B/KX-TG470B/KX-TGA405B 15.3. Circuit Board (Handset_Main) 15.3.1. Component View LED11 LED10 LED12 ANT_TP C801 ANT-TP RESET ANT-GND C804 C802 C814 C812 C813 C810 C822 C820 R807 C805 C806 ATSTP CKM/STM CKM/STM GND_J RSTN (CLK:13.824MHz) C96 C97 3.0V (Output) 3.0V VBAT_MON VBG/CHG_MON...
  • Page 90 KX-TG4753B/KX-TG470B/KX-TGA405B 15.3.2. Bottom View CN3_C PNLB2012Z LED7 LED9 LED9 SOFT_A SOFT_B SOFT_C FLASH LED1 LED2 LEFT RIGHT DOWN TALK KX-TGA470 CIRCUIT BOARD (Handset_Main (Bottom View))

  • Page 91: Circuit Board (Handset_Led)

    KX-TG4753B/KX-TG470B/KX-TGA405B 15.4. Circuit Board (Handset_LED) PNLB1964Z KX-TGA470 CIRCUIT BOARD (Handset_LED (Component View))

  • Page 92: Circuit Board (Charger Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 15.5. Circuit Board (Charger Unit) 15.5.1. Component View CIRCUIT BOARD (Charger Unit (Component View)) 15.5.2. Bottom View CIRCUIT BOARD (Charger Unit (Bottom View))

  • Page 93: Circuit Board (Range Extender)

    KX-TG4753B/KX-TG470B/KX-TGA405B 15.6. Circuit Board (Range Extender) 15.6.1. Component View KX-TGA405 CIRCUIT BOARD (Range Extender (Component View))
  • Page 94 KX-TG4753B/KX-TG470B/KX-TGA405B 15.6.2. Bottom View C309 R305 C310 R302 C307 R301 R307 C303 3.0A JJ371 F301 C513 C511 C611 IC611 R606 R505 R605 R506 R502 KX-TGA405 CIRCUIT BOARD (Range Extender (Bottom View))

  • Page 95: Exploded View And Replacement Parts List

    KX-TG4753B/KX-TG470B/KX-TGA405B 16 Exploded View and Replacement Parts List 16.1. Cabinet and Electrical Parts (Base Unit) E1 (*1) PCB1 PCB2 Ref.No. Figure 2.6 x 8mm Note: (*1) This cable is fixed by welding. Refer to How to Replace the Base Unit LCD (P.53)

  • Page 96: Cabinet And Electrical Parts (Handset)

    (*1) This cable is fixed by welding. Refer to How to Replace the Handset LCD (P.55). (*2) The rechargeable Ni-MH battery HHR-4DPA is available through sales route of Panasonic. (*3) Attach the SPACER (No. 121) to the exact location described above.

  • Page 97: Cabinet And Electrical Parts (Charger Unit)

    KX-TG4753B/KX-TG470B/KX-TGA405B 16.3. Cabinet and Electrical Parts (Charger Unit) 200-1 PCB200 200-3 200-2 200-4 Ref.No. Figure 2 8 mm...

  • Page 98: Cabinet And Electrical Parts (Range Extender)

    KX-TG4753B/KX-TG470B/KX-TGA405B 16.4. Cabinet and Electrical Parts (Range Extender) 300-2 PCB1 300-1 300-5 300-3 300-4 Ref.No. Figure 2.6 x 8mm...

  • Page 99: Accessories And Packing Materials

    KX-TG4753B/KX-TG470B/KX-TGA405B 16.5. Accessories and Packing Materials 16.5.1. KX-TG4753B P3 (*1) P3 (*1) A4, A5, A6 Note: (*1) These pads are pieces of Ref No.P1 (GIFT BOX).
  • Page 100 KX-TG4753B/KX-TG470B/KX-TGA405B 16.5.2. KX-TGA470B A103 P102 (*1) A102 A101 P101 Note: (*1) This pad is a piece of Ref No.P101 (GIFT BOX).

  • Page 101: Replacement Parts List

    KX-TG4753B/KX-TG470B/KX-TGA405B 16.6. Replacement Parts List Safety Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) PQJJ1T039L JACK, MODULAR Note: K2ECYZ000001 JACK, DC The “RTL” marking indicates that its Retention Time is PNKF1228Z1 CABINET COVER PS-HB PNHA1013Z...
  • Page 102 KX-TG4753B/KX-TG470B/KX-TGA405B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks R164 D0GB272JA057 2.7k C512 ECUE1A104KBQ 0.1 R165 ERJ3GEYJ273 C513 ECUV1A225KBV 2.2 R167 D0GG270JA007 27 C514 ECUE1A104KBQ 0.1 R171 D0GA220JA021 22 C515...
  • Page 103 KX-TG4753B/KX-TG470B/KX-TGA405B 16.6.2. Handset Safety Ref. Part No. Part Name & Description Remarks 16.6.2.1. Cabinet and Electrical Parts LED12 B3ACB0000190 LED (COILS) C812 PQLQR4C8N2J COIL G1CR18J00004 COIL Safety Ref. Part No. Part Name & Description Remarks (RESISTOR ARRAYS) D1H83314A013 RESISTOR ARRAY...
  • Page 104 KX-TG4753B/KX-TG470B/KX-TGA405B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks ECUE1A104KBQ 0.1 E106 PQHG10729Z RUBBER PARTS, RECEIVER ECUE1A104KBQ 0.1 E107 PNVE1002Z BATTERY TERMINAL ABS-HB ECUE0J105KBQ 1 K2HD103D0001 JACK ECUV1A225KBV 2.2 K5H252Y00002 FUSE...
  • Page 105 (FUSE) (*1) You can download and refer to the Operating F301 K5H302Y00003 FUSE Instructions (Instruction book) on TSN Server. (RESISTOR ARRAYS) RA501 EXB28V330 RESISTOR ARRAY 16.6.5.1. KX-TG4753B RA502 EXB28V103 RESISTOR ARRAY RA504 D1H468020001 RESISTOR ARRAY (RESISTORS) Safety Ref. Part No.
  • Page 106 KX-TG4753B/KX-TG470B/KX-TGA405B Safety Ref. Part No. Part Name & Description Remarks PQZZ1CD300E JIG CABLE (*1) PNZZTG4741M BATCH FILE CD-ROM (*1) PQZZ430PIR TIP OF SOLDERING IRON (*2) PQZZ430PRB RUBBER OF SOLDERING IRON (*2) T.I/N KXTG4753B KXTGA470B KXTGA405B...
  • Page 107 KX-TGA470B KX-TGA405B Digital Cordless Answering System B: Black Version (for U.S.A.) Please file and use this supplement manual together with the service manual for Model No.KX-TG4753B/ KX-TGA470B/KX-TGA405B, Order No. KM41201527CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1. REFERENCE CHART------------------------------------ 2 1.2.
  • Page 108 KX-TG4753B/KX-TGA470B/KX-TGA405B 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: *c: To share the parts with other models 2.
  • Page 109 KX-TGA470B KX-TGA405B Digital Cordless Answering System B: Black Version (for U.S.A.) Please file and use this supplement manual together with the service manual for Model No.KX-TG4753B/ KX-TGA470B/KX-TGA405B, Order No. KM41201527CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1. REFERENCE CHART------------------------------------ 2 1.2.
  • Page 110 KX-TG4753B/KX-TGA470B/KX-TGA405B 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.
  • Page 111 KX-TGA470B KX-TGA405B Digital Cordless Answering System B: Black Version (for U.S.A.) Please file and use this supplement manual together with the service manual for Model No.KX-TG4753B/ KX-TGA470B/KX-TGA405B, Order No. KM41201527CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1. REFERENCE CHART------------------------------------ 2 1.2.
  • Page 112 KX-TG4753B/KX-TGA470B/KX-TGA405B 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: *m: Discontinued (To be replaced with a new part) 2.

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