Panasonic KX-TG4771B Service Manual
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Panasonic KX-TG4771B Service Manual

Digital corded/cordless answering system
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Caller ID Compatible
KX-TGA470B
(Portable)
(Charger Unit)
Configuration for each model
Model No
Base Unit
Portable
KX-TG4771 1 (TG4771) 1 (TGA470)
KX-TG4772 1 (TG4771) 2 (TGA470)
KX-TG4773 1 (TG4771) 3 (TGA470)
KX-TGA470*
1 (TGA470)
*KX-TGA470 is also an optional accessory, which contains a
portable and a charger.
KX-TG4771B
(Base Unit)
Charger Unit Expandable
1
Up to 6
2
Up to 6
3
Up to 6
1
Telephone Equipment
KX-TG4771B
Model No.
KX-TG4772B
KX-TG4773B
KX-TGA470B
Digital Corded/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. KM41112516CE
F13

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Summary of Contents for Panasonic KX-TG4771B

  • Page 1 KX-TG4773 1 (TG4771) 3 (TGA470) Up to 6 KX-TGA470* 1 (TGA470) *KX-TGA470 is also an optional accessory, which contains a portable and a charger. © Panasonic System Networks Co., Ltd. 2012 Unauthorized copying and distribution is a violation of law.
  • Page 2 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions----------------------------------------------- 4 15.6. Charger Unit----------------------------------------------- 84 1.1. For Service Technicians --------------------------------- 4 16 Exploded View and Replacement Parts List ----------- 85 2 Warning -------------------------------------------------------------- 4 16.1. Cabinet and Electrical Parts (Base Unit) ----------- 85 2.1.

  • Page 4: Safety Precautions

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 Portable is same frequency. Refer to Frequency Table (P.58). 4.1.1. TDD Frame Format 5 ms 5 ms Up Link ( Portable - >...
  • Page 8 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 1.9 GHz 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-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.2. Block Diagram (Base Unit_Main)

  • Page 10: Block Diagram (Base Unit_Rf Part)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.3. Block Diagram (Base Unit_RF Part) ANT2 ANT2 ANT1 DA801 TXON RXON ANT1 KX-TG4771/4772/4773 BLOCK DIAGRAM (Base Unit_RF Part)

  • Page 11: Circuit Operation (Base Unit)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.4.4. Power Supply Circuit/Reset Circuit The power supply voltage from AC adaptor is converted to VBAT (3.0 V) in IC302. And +3.0V for peripherals and analog part is insulated from VBAT by Doubler of BBIC. Circuit Operation: +3.0V VBAT...
  • Page 13 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 14 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 15 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 16: Block Diagram (Portable)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.5. Block Diagram (Portable) 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 VBAT CHARGE HEADSET_DET (KEY) CP_OFF PUMP (BELL) KEY_LED BELL_LED Monitor SP...

  • Page 17: Block Diagram (Portable_Rf Part)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.6. Block Diagram (Portable_RF Part) TXON DA801 RXON KX-TGA470 BLOCK DIAGRAM (Portable_RF Part)

  • Page 18: Circuit Operation (Portable)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.7. Circuit Operation (Portable) 4.7.1. Outline Portable consists of the following ICs as shown in Block Diagram (Portable) (P.16). • 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 19: Charge Circuit

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.7.3. Charge Circuit Circuit Operation: When charging the Portable on the Base Unit, the charge current is as follows; DC+(6.5 V) → F301 → R371 → R372 →CHARGE+(Base) → CHARGE+(Portable) → Q3 → F1 → BATTERY+... Battery... BATTERY- → R45 → GND → CHARGE-(Portable)→ CHARGE-(Base) → GND → DC-(GND) In this way, the BBIC on Portable detects the fact that the battery is charged.

  • Page 20: Circuit Operation (Charger Unit)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.8. Circuit Operation (Charger Unit) Charge control is executed at Portable side so that the operation when using charger is also controlled by Portable. Refer to Circuit Operation (Portable) (P.18) AC Adaptor The route for this is as follows: DC+pin of J1(+) → F1 → R1 → R2 → D1 → CHARGE+pad → Portable → CHARGE-pad → DC-...

  • Page 21: Signal Route

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 4.9. Signal Route ROUTE SIGNAL ROUTE PORTABLE TX PORTABLE MIC - R73/74 - C11/13 - RA4 - IC1(22/23) - <PORTABLE_RF_TX_ROUTE> - ANT. --- ---ANT. - <BASE_UNIT_RF_RX_ROUTE> - IC501(46/47 - 28) - C184 - Q161 - Q902 - D101 - [P101] - T/R(TEL LINE)
  • Page 22 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B RF part signal route SIGNAL ROUTE ROUTE PORTABLE RF IC1(44/45) - L809 - C812 - DA801 - C803 - C801 - ANT [ TX_ROUTE ] PORTABLE RF ANT - C801 - C803 - DA801 - C826 - IC1(46/47) [ RX_ROUTE ]...

  • Page 23: Location Of Controls And Components

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 24: Test Mode

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 {CALL WAIT}/ {FLASH} Navigator key/ ? (Volume) key {OFF}...
  • Page 25 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 26 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 8.1.2. Portable Important: Make sure the address on LCD is correct when entering new data. Otherwise, you may ruin the unit. Soft keys {CALL WAIT}/ {FLASH} Navigator key/ ? (Volume) key {OFF} Dial keypad H/S key operation H/S LCD 1).
  • Page 27 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Frequently Used Items (Portable) 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 28: Service Mode

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 9 Service Mode 9.1. How to Clear User Setting (Portable Only) Portable Press 2, 5, 8, simultaneously until a beep sound is heard. Then single portable is initialized. (The contents of user setting are reset to factory default) *Usage time is not cleared.

  • Page 29: Troubleshooting Guide

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10 Troubleshooting Guide 10.1. Troubleshooting Flowchart 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 Battery Charge Check Battery Charge Check Link...

  • Page 30: Check Power

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.1. Check Power 10.1.1.1. Base Unit Is the AC Adaptor inserted into AC outlet? (*1) AC Adaptor. Is output voltage of AC adaptor 5.5 V? Check Check Power Supply Circuit. Check VDDC (1.2 V): Test Point [VDDC] RSTN: Reset = "High"? Check Reset Circuit.

  • Page 31: Check Record

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.2. Check Record 10.1.2.1. Base Unit Not record Incoming Message Check Telephone Line Interface Check Bell signal. [Bell]. Check Telephone Line Interface Does the unit catch line? [OFF HOOK]. Check Line In: Pin 16 of BBIC. Check ICM Recording in Signal Route.
  • Page 32 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B <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 33 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 34: Check Playback

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.3. Check Playback 10.1.3.1. Base Unit Note: (*1) Both Auto Disconnect and CPC don't detect for the first 2 seconds. (*2) If the "Disable" is selected, even if the parallel-connected telephone is OFF HOOK, the line isn't disconnected. 5) Back to "standby" mode automatically after step 4).

  • Page 35: Check Link

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.5. Check Link 10.1.5.1. Base Unit Does Base Unit make link with normal working Base Unit is OK. Check Portable. Portable? Is the voltage of VBAT about 3.4 V? Check around Power Supply Circuit. Is the voltage of VDDC about 1.7 V? Adjust +3.0V voltage to 3.0 V.
  • Page 36 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.5.2. Portable Does Portable make link with Base Unit? Portable 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 37: Check The Rf Part

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.6. Check the RF part 10.1.6.1. Finding out the Defective part 1. Prepare Regular P (*1) and Regular BU(*2). 2. a. Re-register regular P (Normal mode) to base unit (to be checked). If this operation fails in some ways, the base unit is defective.
  • Page 38 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.6.2. RF Check Flowchart Each item (1 ~ 5) of RF Check Flowchart corresponds to Check Table for RF part (P.39). 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 39 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.6.3. Check Table for RF part Item BU (Base Unit) Check P (Portable) Check Link Confirmation Normal 1. Register Regular P to BU (to be checked). 1. Register P (to be checked) to Regular BU. 2. Press [Talk] key of the Regular P to 2.
  • Page 40 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 P (Portable) Check Range Confirmation TX TEST 1. Register Regular P to BU (to be checked). 1. Register P (to be checked) to Regular BU.
  • Page 41 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.7. Registering a Portable to the Base Unit The supplied portable and base unit are pre-registered. If for some reason the portable is not registered to the base unit, re-register the portable. 1 Portable: {MENU} # 1 3 0...
  • Page 42 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 10.1.9. Check Portable Transmission 10.1.14. Check Corded Handset Transmission Check MIC of portable. Check (Corded) Handset. Check portable Tx in Signal Route. Cross Reference: Check (Corded) Handset TX in Signal Route. Signal Route (P.21) Cross Reference: 10.1.10. Check Portable Reception Signal Route (P.21)

  • Page 43: Disassembly And Assembly Instructions

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 11 Disassembly and Assembly Instructions 11.1. Disassembly Instructions 11.1.1. Base Unit Remove the 6 screws to remove the cabinet cover. Cabinet Cover Remove 1 screw, Parallel wire and solders to remove the main P.C. Board. Main P.C. Board Parallel wire...
  • Page 44 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Unhook the hook and remove the 2 screws to remove the jack holder. 2 screws Hook 8 screws Remove the 8 screws to remove the Operation P.C. Board. Operation P.C. Board...
  • Page 45 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 11.1.2. Portable 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 46 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 11.1.3. Charger Unit 2 charge terminals...

  • Page 47: Assembly Instructions

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 11.2. Assembly Instructions 11.2.1. How to Replace the Base unit LCD LCD PLATE LCD HOLDER *PROCESS IT AS SHOWN IN FIGURE. REVERSE. LED P.C.B. *PROCESS IT AS SHOWN IN FIGURE. REFLECTOR SHEET *PROCESS IT AS SHOWN IN FIGURE. DIFFUSION SHEET...

  • Page 48: How To Replace The Portable Lcd

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 11.3. How to Replace the Portable 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 49: Measurements And Adjustments

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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.29) 12.1. Equipment Required • Digital multi-meter (DMM): it must be able to measure voltage and current.
  • Page 50 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.2.2. Connections (Portable) 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 51 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.2.3. 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 52 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.2.4. 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 53: Adjustment Standard (Base Unit)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.3. Adjustment Standard (Base Unit) When connecting the simulator equipment for checking, please refer to below. 12.3.1. Bottom View HOOK_1 HOOK_DET HOOK_2 Spectrum F301 Analyzer ANT1-TP T E L Oscilloscope RINGER- D11 3 Volt R N G RINGER+ Q11 1...

  • Page 54: Adjustment Standard (Charger Unit)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 55: Adjustment Standard (Portable)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.5. Adjustment Standard (Portable) When connecting the simulator equipment for checking, please refer to below. 12.5.1. 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 56: Things To Do After Replacing Ic Or X'tal

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.6. 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 57 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.6.1.2. Portable First, operate the PC setting according to The Setting Method of JIG (P.49). 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 58: Frequency Table

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 12.7. 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 59: Miscellaneous

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 60 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 61: How To Replace The Flat Package Ic

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 62 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 63: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 13.3. Terminal Guide of the ICs, Transistors and Diodes 13.3.1. Base Unit (Reverse View) PNWI2TG4771H PNWI1TG4771H C0DBEYY00102 DSC7003S0L C2HBCY000106 C1CB00002903 C0JBAQ000247 B1GBCFYY0020, B1ADGJ000002, 2SC6054JSL B1ABDM000001, 2SA1037K, B1GDCFNN0001 B1ADCF000040, B1ADNB000003, B1CCBR000001 B1GDCFJJ0001 Cathode Cathode Anode Cathode Anode Anode DA2J10100L B0JCMC000006...

  • Page 64: Schematic Diagram

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14 Schematic Diagram 14.1. For Schematic Diagram 14.1.1. Base Unit (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 65 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Memo...

  • Page 66: Base Unit (Main)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14.2. Base Unit (Main) HANDSETMICp HANDSETMICn C451 R451 C452 R807 RXON C822 C827 C892 MIC1 C894 C826 RCVRp RCVRn C933 C820 ANT-S-GND2 DA801 C805 DA802 C810 C806 R806 C825 C811 C814 * Start Monitor WBX01 16pin * When "SFR" command PARALLEL WIRE is executed, 13.824 MHz...
  • Page 67 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B HANDSETMICp HANDSETMICn Q902 Q1010 Q161 HOOK_1 Q1012 HOOK2-4 HOOKSW HOOK_DET HOOK2-6 RCVRp HOOK_DET HOOK_2 RCVRn C933 Q905 Q903 (YELLOW) R948 Q900 Q904 (GREEN) Caller ID D907 C928 R939 HOOK Q908 R1017 R509 C940 Q917 0.01u pulse_mute pulse IC902 Q909...

  • Page 68: Base Unit (Operation)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14.3. Base Unit (Operation) 1u 25 1u 25 1u 25 1u 25 1u 25 CAP2N 1u 25 SW901 CAP2P 1u 25 CAP1P 16pin CAP1N HOOK1 1u 25 CAP3P HOOK2 VOUT HOOK_GND HOOK3 LCD_VDD LCD_GND /RESET LCD_SID /CS1 LCD_SCL LCD_CD...

  • Page 69: Base Unit (Led)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14.4. Base Unit (LED) LCD-Backlight NC: No Components KX-TG4771 SCHEMATIC DIAGRAM (Base Unit (LED))

  • Page 70: Portable (Main)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14.5. Portable (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 71 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 72: Portable (Led)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14.6. Portable (LED) KX-TGA470 SCHEMATIC DIAGRAM (Handset (LED))

  • Page 73: Charger Unit

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 14.7. Charger Unit 1 (0.5W) 1 (0.5W) SCHEMATIC DIAGRAM (Charger Unit)
  • Page 74 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Memo...

  • Page 75: Printed Circuit Board

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15 Printed Circuit Board 15.1. Base Unit (Main) 15.1.1. Component View WBX01 HOOK1 HOOK_GND LCD_VDD LCD_SID LCD_CD LCD_CS SP_LED LED_GND HOOK2 HOOK3 LCD_GND LCD_SCL LCD_RST LCD_BLT MSG_LED ANS_LED WBX02 C928 NC KEYS_C KEYIN1 KEYIN3 KEYIN2 KEYS_D KEYS_A KEYIN4 KEYS_B...
  • Page 76 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.1.2. Bottom View HOOK_1 HOOK_DET HOOK_2 F301 ANT1-TP PNLB2016Z T E L RINGER- D11 3 R N G RINGER+ Q11 1 VBAT R933 +5.5V UGND Q911 VBAT For JIG Q1011 R605 R606 VBAT_ap u Q906 R612 VBAT_apu R934 C611 C477 +3.0V...

  • Page 77: Base Unit (Operation)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.2. Base Unit (Operation) 15.2.1. Component View PNLB2051Z SW901 KX-TG4771 CIRCUIT BOARD (Base Unit (Operation) (Component View))
  • Page 78 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.2.2. Bottom View PNLB2051Z +LED- CN903 SOFT3 SOFT1 SOFT2 LED902 HOLD/CONF ERASE/MUTE REDIAL/PAUSE STOP LOCAT/INT FLASH MSG1 MSG2 SKIP LED903 MSG3 MSG4 DOWN LED901 KX-TG4771 CIRCUIT BOARD (Base Unit (Operation) (Bottom View))

  • Page 79: Base Unit (Led)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.3. Base Unit (LED) LED1 LED2 KX-TG4771 CIRCUIT BOARD (Base Unit (LED) (Component View))
  • Page 80 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Memo...

  • Page 81: Portable (Main)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.4. Portable (Main) 15.4.1. 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 VDDC...
  • Page 82 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.4.2. 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 (Portable (Main) (Bottom View))

  • Page 83: Portable (Led)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.5. Portable (LED) PNLB1964Z KX-TGA470 CIRCUIT BOARD (Portable (LED) (Component View))

  • Page 84: Charger Unit

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 15.6. Charger Unit 15.6.1. Component View CIRCUIT BOARD (Charger Unit (Component View)) 15.6.2. Bottom View CIRCUIT BOARD (Charger Unit (Bottom View))

  • Page 85: Exploded View And Replacement Parts List

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16 Exploded View and Replacement Parts List 16.1. Cabinet and Electrical Parts (Base Unit) LED Board PCB2 PCB1 Ref.No. Figure 2.6 8 mm...

  • Page 86: Cabinet And Electrical Parts (Portable)

    (*1) This cable is fixed by welding. Refer to How to Replace the Portable LCD (P.48). (*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 87: Cabinet And Electrical Parts (Charger Unit)

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.3. Cabinet and Electrical Parts (Charger Unit) 200-1 PCB200 200-2 200-3 200-4 Ref.No. Figure 2 8 mm...

  • Page 88: Accessories And Packing Materials

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.4. Accessories and Packing Materials 16.4.1. KX-TG4771B...
  • Page 89 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.4.2. KX-TG4772B A101 A103 A104 A102 A105 A106 A104 P102 P102 P102 P101...
  • Page 90 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.4.3. KX-TG4773B A203 A201 P202 A202 A206 P202 A205 A204 P202 A205 A205 P201...
  • Page 91 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.4.4. KX-TGA470B A303 (*1) P302 A302 A301 P301 Note: (*1) This pad is a piece of Ref. No. P301 (GIFT BOX).

  • Page 92: Replacement Parts List

    KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.5. Replacement Parts List Safety Ref. Part No. Part Name & Descrip- Remarks tion 1. RTL (Retention Time Limited) PNKL1037Z1 STAND, WALL MOUNT ABS-HB Note: PNLA1088Z ANTENNA The “RTL” marking indicates that its Retention Time is PQMG10025W RUBBER PARTS, MIC L0AA04A00028 SPEAKER Limited.
  • Page 93 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks DA801 B0DDCD000001 DIODE(SI) R911 D0GA222JA021 2.2k DA802 B0DDCD000001 DIODE(SI) R912 D0GA221JA021 220 (COILS) R913 D0GA561JA021 560 L809 G1C7N5JA0044 COIL R919 D0GB104JA057 100k...
  • Page 94 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks C503 ECJ1VB0G106M 10 C908 PQCUV0J106KB 10 C504 ECUE0J105KBQ 1 C910 ECUE1H101JCQ 100p C505 ECJ1VB0G106M 10 C912 F2A1C1010119 100 C506 ECUV1A105KBV 1 C918 ECUE1C333KBQ 0.033...
  • Page 95 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 16.5.1.4. LED Board parts Safety Ref. Part No. Part Name & Description Remarks B0BC4R3A0006 DIODE(SI) B0BC4R3A0006 DIODE(SI) Safety Ref. Part No. Part Name & Description Remarks B0BC4R3A0006 DIODE(SI) (LEDS) B0BC4R3A0006 DIODE(SI) DA801 B0DDCD000001 DIODE(SI) LED1 B3AFB0000211 LED (LEDS) LED2...
  • Page 96 F1G1H2R4A480 2.4p (*1) You can download and refer to the Operating C806 F1G1H2R4A480 2.4p Instructions (Instruction book) on TSN Server. C810 F1G1H2R5A480 2.5p C811 ECUE1H101JCQ 100p 16.5.4.1. KX-TG4771B C813 F1G1H1R6A480 1.6p C820 F1G1H1R8A480 1.8p C822 ECUE1H100DCQ 10p Safety Ref. Part No.
  • Page 97 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B Safety Ref. Part No. Part Name & Description Remarks PQJA212V CORD, HANDSET PNKE1132Z1 HANGER, BELT CLIP ABS-HB PNLV226Z AC ADAPTOR PNQX5103Z INSTRUCTION BOOK (*1) PNPK3509001Z GIFT BOX PNPD1612Z CUSHION 16.5.4.2. KX-TG4772B Safety Ref. Part No. Part Name & Description Remarks...
  • Page 98 KX-TGA470B Digital Corded/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-TG4771B/ KX-TG4772B/KX-TG4773B/KX-TGA470B, Order No. KM41112516CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1. REFERENCE CHART------------------------------------ 2 1.2.
  • Page 99 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 100 KX-TGA470B Digital Corded/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-TG4771B/ KX-TG4772B/KX-TG4773B/KX-TGA470B, Order No. KM41112516CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1. REFERENCE CHART------------------------------------ 2 1.2.
  • Page 101 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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 102 KX-TGA470B Digital Corded/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-TG4771B/ KX-TG4772B/KX-TG4773B/KX-TGA470B, Order No. KM41112516CE. TABLE OF CONTENTS PAGE 1 REPLACEMENT PARTS LIST--------------------------------- 2 1.1. REFERENCE CHART------------------------------------ 2 1.2.
  • Page 103 KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B 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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