Panasonic KX-TG2480BXS Service Manual
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Panasonic KX-TG2480BXS Service Manual

Panasonic KX-TG2480BXS Service Manual

Digital cordless phone
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Telephone Equipment
KX-TG2480BXS
KX-TGA248BXS
Digital Cordless Phone
Silver Version
(for Asia, Middle Near East and Other Areas)
© 2005 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KM40509863CE
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-TG2480BXS

  • Page 1 ORDER NO. KM40509863CE Telephone Equipment KX-TG2480BXS KX-TGA248BXS Digital Cordless Phone Silver Version (for Asia, Middle Near East and Other Areas) © 2005 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-TG2480BXS / KX-TGA248BXS Note: Because CONTENTS 4 is the extract from the Operating Instructions of this model, it is subject to change without notice. You can download and refer to the original Operating Instructions on TSN Server for further information.
  • Page 3 KX-TG2480BXS / KX-TGA248BXS 22 CABINET AND ELECTRICAL PARTS (BASE UNIT) 27.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 23 CABINET AND ELECTRICAL PARTS (HANDSET) 27.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 24 ACCESSORIES AND PACKING MATERIALS 28 SCHEMATIC DIAGRAM (BASE UNIT) 25 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES...

  • Page 4: About Lead Free Solder (Pbf: Pb Free)

    KX-TG2480BXS / KX-TGA248BXS 1 ABOUT LEAD FREE SOLDER (PbF: Pb free) Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn), Silver (Ag), and Copper (Cu).

  • Page 5: How To Recognize That Pb Free Solder Is Used

    KX-TG2480BXS / KX-TGA248BXS 1.2. How to recognize that Pb Free solder is used (Example: Handset P.C.B.) IC901 IC201 IC202 Marked (Component View) Note: The location of the “PbF” mark is subject to change without notice. 2 FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity.

  • Page 6: Operating Instructions

    KX-TG2480BXS / KX-TGA248BXS 4 OPERATING INSTRUCTIONS 4.1. Battery 4.1.1. Battery Installation 4.1.2. Battery Charge 4.1.3. Recharging the Battery 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.
  • Page 7 KX-TG2480BXS / KX-TGA248BXS 4.1.5. Battery Replacement 4.1.6. Battery Performance...

  • Page 8: Location Of Controls

    KX-TG2480BXS / KX-TGA248BXS 4.2. Location of Controls 4.2.1. Base unit 4.2.2. Handset...

  • Page 9: Displays

    KX-TG2480BXS / KX-TGA248BXS 4.3. Displays 4.3.1. Handset Display Items 4.3.2. Troubleshooting (Handset LCD)

  • Page 10: Settings

    KX-TG2480BXS / KX-TGA248BXS 4.4. Settings 4.4.1. Connections 4.4.1.1. Connecting the AC Adaptor...

  • Page 11: Connecting The Telephone Line Cord

    KX-TG2480BXS / KX-TGA248BXS 4.4.1.2. Connecting the Telephone Line Cord...
  • Page 12 KX-TG2480BXS / KX-TGA248BXS...

  • Page 13: Guide To Handset Programming

    KX-TG2480BXS / KX-TGA248BXS 4.4.2. Guide to Handset Programming...

  • Page 14: Dial Lock

    KX-TG2480BXS / KX-TGA248BXS 4.4.3. Dial Lock For Service Hint: **: If the current password is forgotten, enter “726276642” and you will be able to go to the next step.

  • Page 15: Direct Commands

    KX-TG2480BXS / KX-TGA248BXS 4.4.4. Direct Commands...

  • Page 16: Troubleshooting

    KX-TG2480BXS / KX-TGA248BXS 4.5. Troubleshooting If the handset display shows error messages, see “Troubleshooting (Handset LCD) (P.9)” for the Cause & solution.
  • Page 17 KX-TG2480BXS / KX-TGA248BXS...
  • Page 18 KX-TG2480BXS / KX-TGA248BXS...

  • Page 19: Disassembly Instructions

    KX-TG2480BXS / KX-TGA248BXS 5 DISASSEMBLY INSTRUCTIONS 5.1. Base Unit Shown in Fig.- To Remove Remove Cabinet Cover Screws (2.6 × 14)..(A) × 5 Main P.C. Board Tape and Solder Screws (2.6 × 8)...(B) × 5 Main P.C. Board...

  • Page 20: Handset

    KX-TG2480BXS / KX-TGA248BXS 5.2. Handset Shown in Fig.- To Remove Remove Cabinet Cover Screws (2.6 × 12)..(C) × 2 Follow the procedure. Main P.C. Board Tape and Solder Screw (2.6 × 12)..(D) × 1 Screws (2.6 × 9)..(E) × 2 Charge Terminals Main P.C.

  • Page 21: Assembly Instructions

    KX-TG2480BXS / KX-TGA248BXS 6 ASSEMBLY INSTRUCTIONS 6.1. Fix the LCD to P.C. Board (Handset)

  • Page 22: Troubleshooting Guide

    KX-TG2480BXS / KX-TGA248BXS 7 TROUBLESHOOTING GUIDE Cross Reference: Check Handset Transmission (P.28) Check Battery Charge (P.22) Check Handset Reception (P.28) Check Link (P.23) Check Caller ID (P.28) Check the RF Part (P.24) 7.1. Check Battery Charge Note: DSP is IC501.

  • Page 23: Check Link

    KX-TG2480BXS / KX-TGA248BXS 7.2. Check Link Note: (*1) Refer to Finding Out the Defective Part (P.24). Cross Reference: RF Check Flowchart (P.25)

  • Page 24: Check The Rf Part

    KX-TG2480BXS / KX-TGA248BXS 7.3. Check the RF Part 7.3.1. Finding Out the Defective Part After All the Checkings or Repairing Re-register Handset (to be checked) to Base Unit (to be checked) and HS to BU Regular unit (working). 7.3.1.1. Re-registering the Handset...
  • Page 25 KX-TG2480BXS / KX-TGA248BXS 7.3.2. RF Check Flowchart Each item (1a ~5) of RF Check Flowchart corresponds to Check Table for RF part (P.26). Please refer to the each item.
  • Page 26 KX-TG2480BXS / KX-TGA248BXS 7.3.3. Check Table for RF part Item BU checking HS checking 1a Link confirmation Normal 1. Re-resister HS Regular Unit (working) to BU. 1. Re-resister HS to BU of Regular Unit (working). 2. Press [Talk] key of the HS Regular Unit to 2.
  • Page 27 KX-TG2480BXS / KX-TGA248BXS 7.3.4. RF-DSP interface signal wave form...

  • Page 28: Check Handset Transmission

    KX-TG2480BXS / KX-TGA248BXS 7.4. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.66). 7.5. Check Handset Reception Cross Reference: SIGNAL ROUTE (P.66). Note: When checking the RF UNIT, Refer to Check the RF Part (P.24) 7.6. Check Caller ID Cross Reference: Telephone Line Interface (P.53).

  • Page 29: Adjustment And Test Mode

    KX-TG2480BXS / KX-TGA248BXS 8 ADJUSTMENT AND TEST MODE 8.1. Test Mode Flow Chart for Base Unit 8.1.1. Test Burst Mode Note: (*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test Mode”...
  • Page 30 KX-TG2480BXS / KX-TGA248BXS 8.1.2. RX-CW TEST Mode Note: (*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test Mode” in Base Unit Reference Drawing (P.38). -Insert AC adaptor during checking.
  • Page 31 KX-TG2480BXS / KX-TGA248BXS 8.1.3. Test Link Mode Note: (*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test Mode” in Base Unit Reference Drawing (P.38). -Insert AC adaptor during checking.
  • Page 32 KX-TG2480BXS / KX-TGA248BXS 8.1.4. Adjustment Mode Cross Reference Check and Adjust X801 (Base Unit) Frequency (P.37) Note: (*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test Mode” in Base Unit Reference Drawing (P.38). -Insert AC adaptor during checking.

  • Page 33: Test Mode Flow Chart For Handset

    KX-TG2480BXS / KX-TGA248BXS 8.2. Test Mode Flow Chart for Handset 8.2.1. Test Burst Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.) (*2) Refer to Check Table for RF part (P.26) and RX-CW TEST Mode (P.30) for proper Base Unit Settings.
  • Page 34 KX-TG2480BXS / KX-TGA248BXS 8.2.2. RX-CW TEST Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.) (*2) Refer to Check Table for RF part (P.26) and Test Burst Mode (P.29) for proper Base Unit Settings.
  • Page 35 KX-TG2480BXS / KX-TGA248BXS 8.2.3. Test Link Mode Note: (*1) LCD displays the Channel number. (exception: default/ CH00 = 1ch.) (*2) for factory use only. (*3) Refer to Check Table for RF part (P.26) and Test Link Mode (P.31) for proper Base Unit Settings.
  • Page 36 KX-TG2480BXS / KX-TGA248BXS 8.2.4. Adjustment Mode Cross Reference (*1) Adjust Battery Low Detector Voltage (Handset) (P.37) Note: (*2) These are the default values. (*3) These values may not be fixed depending on the battery strength. (*4) Refer to the table below, if using Spectrum Analyzer for checking.

  • Page 37: X801 (Base Unit), X201 (Handset) Check

    KX-TG2480BXS / KX-TGA248BXS 8.3. X801 (Base Unit), X201 (Handset) Check Equipment: Frequency counter Check Point for measurement: BCK Checking tolerance: 13.824MHz ± 100Hz (Base Unit)/13.824MHz ± 100Hz (Handset) 8.3.1. Check and Adjust X801 (Base Unit) Frequency 1. Set up Base Unit in TEST mode.

  • Page 38: Base Unit Reference Drawing

    KX-TG2480BXS / KX-TGA248BXS IC151 IC601 Q161 D904 C911 L913 FL901 C913 D903 L904 Q108 C904 C910 R903 L901 Q142 Q104 R992 R991 L102 L101 CN201 CN101 Q800 FVCC RA501 Q241 LGS1 LOUT INT0 INT1 UVCC2 URX2 Q261 UTX2 TTS1 TTS2...
  • Page 39 KX-TG2480BXS / KX-TGA248BXS SG out ANT1 ANTG1 PQUP11288ZA-UR TXD2 KIN2 KIN1 KIN3 URX1 UTX1 UGND1 UVCC1...

  • Page 40: Handset Reference Drawing

    KX-TG2480BXS / KX-TGA248BXS...

  • Page 41: Frequency Table

    KX-TG2480BXS / KX-TGA248BXS 8.7. Frequency Table Channel TX/RX Frequency TEST MODE Frequency Channel TX/RX Frequency TEST MODE Frequency (MHz) (MHz) (MHz) (MHz) 2400.914355 2400.724512 2457.994043 2457.804199 2401.808203 2401.618359 2458.887891 2458.698047 2402.698096 2402.508252 2459.777783 2459.587939 2403.591943 2403.402100 2460.671631 2460.481787 2404.481836 2404.291992 2461.561523...

  • Page 42: How To Clear User Setting (Handset Only)

    KX-TG2480BXS / KX-TGA248BXS 8.8. How to Clear User Setting (Handset Only) The operation reset the unit to Factory setting. (Erase stored phone numbers, Caller list and etc.) This operation should not be performed for a usual repair. 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...

  • Page 43: Description

    KX-TG2480BXS / KX-TGA248BXS 9 DESCRIPTION 9.1. Frequency The frequency range of 2400MHz~2481MHz is used. Transmitting and receiving channel between base unit and handset is same frequency. Refer to the Frequency Table. 9.2. FHSS (Frequency Hopping Spread Spectrum) This telephone is using an IC chip which has similar specification to WDCT (World Digital Cordless Telephone) and is the cordless telephone system that can use multiple portable unit simultaneously.
  • Page 44 KX-TG2480BXS / KX-TGA248BXS 9.2.1. TDD Frame Format 9.2.2. TDMA system This system is the cycles of 10ms, and has four duplex paths, so it is possible to perform four duplex communications simultaneously. In 1 slot 1.25ms, the 10ms of voice data is transmitted.

  • Page 45: Signal Flowchart In The Whole System

    KX-TG2480BXS / KX-TGA248BXS 9.3. Signal Flowchart in the Whole System Reception CN101 of the base unit is connected to the TEL line, and signal is entered through the bridge diode D101. While talking, the relay (Q104) is turned ON and amplified at the Q150, then led to DSP (IC501). The DSP encodes ADPCM and TDD/TDMA with FHSS to TX-DATA.

  • Page 46: Explanation Of Link Data Communication

    KX-TG2480BXS / KX-TGA248BXS 10 EXPLANATION OF LINK DATA COMMUNICATION 10.1. Calling 10.2. To Terminate Communication 10.3. Ringing...
  • Page 47 KX-TG2480BXS / KX-TGA248BXS...
  • Page 48 KX-TG2480BXS / KX-TGA248BXS TC_CTRL RSTN RXEN RXGAIN TXEN...

  • Page 49: Circuit Operation (Base Unit_Main)

    KX-TG2480BXS / KX-TGA248BXS 13 CIRCUIT OPERATION (BASE UNIT_MAIN) General Description: (DSP, EEPROM) is a digital speech/signal processing system that implements all the functions of speech compression and memory management required in a digital telephone. The DSP system is fully controlled by a host processor DSP. The host processor provides activation and control of all that functions as follows.

  • Page 50: Eeprom (Ic700)

    KX-TG2480BXS / KX-TGA248BXS 13.2. EEPROM (IC700) Following information data is stored. • • • • Settings ex: ID code, Flash Time, Tone/Pulse 13.3. Power Supply Circuit Function: The power supply voltage from AC adaptor is converted to the desired voltage of each block.
  • Page 51 KX-TG2480BXS / KX-TGA248BXS 13.3.1. Charge Circuit The voltage from the AC is supplied to the charge circuits. Normal charge of maximum 6-hours is started soon after the Handset is placed on the base unit. Then it changes to Trickle charge to prevent from overcharging.

  • Page 52: Reset Circuit

    KX-TG2480BXS / KX-TGA248BXS 13.4. 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 IC300 and power is supplied to the DSP.

  • Page 53: Telephone Line Interface

    KX-TG2480BXS / KX-TGA248BXS 13.5. Telephone Line Interface Telephone Line Interface Circuit: Function • • • • Bell signal detection • • • • ON/OFF hook and pulse dial circuit • • • • Side tone circuit 13.5.1. Line 1 Bell signal detection and OFF HOOK circuit: In the idle mode, Q104 and Q142 are open to cut the DC loop current and the ring load.
  • Page 54 KX-TG2480BXS / KX-TGA248BXS 13.5.2. Line 2 Bell signal detection and OFF HOOK circuit: In the idle mode, Q241 is open to cut the DC loop current and 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 55: Auto Disconnect Circuit

    KX-TG2480BXS / KX-TGA248BXS 13.6. 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 Hold status. Circuit Operation: Operational amplifier with high value resisters is used in order to isolate both lines.

  • Page 56: Parallel Connection Detect Circuit

    KX-TG2480BXS / KX-TGA248BXS Line 2 13.7. Parallel Connection Detect 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 idle state; to catch the empty line automatically.

  • Page 57: Calling Line Identification (Caller Id)

    KX-TG2480BXS / KX-TGA248BXS 13.8. Calling Line Identification (Caller ID) Function: The caller ID is a chargeable ID which the user of a telephone circuit obtains by entering a contract with the telephone company to utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been entered for the circuit being used.

  • Page 58: Ghz Mod/Demod Circuit (Base Unit Rf Part)

    KX-TG2480BXS / KX-TGA248BXS 13.9. 2.4GHz Mod/Demod Circuit (Base Unit RF Part) IC901 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27 of IC901, and then 2.4GHz TX modulated signal is output from pin1. This TX signal is filtered by BPF (FL901) and supplied to Antenna.

  • Page 59: Block Diagram (Handset_Main)

    KX-TG2480BXS / KX-TGA248BXS 14 BLOCK DIAGRAM (HANDSET_MAIN) IC202 D213 MOD_EN RXGAIN RSTN D207 D208 IC205 D205 D206 IC203 VBATT2 3.0V IC201 HSMIP HSMIN INT 1 INT_1 IC204 2.5V KX-TGA248 BLOCK DIAGRAM (Handset_Main)
  • Page 60 KX-TG2480BXS / KX-TGA248BXS TC_CTRL RSTN RXEN RXGAIN TXEN...

  • Page 61: Circuit Operation (Handset)

    KX-TG2480BXS / KX-TGA248BXS 16 CIRCUIT OPERATION (HANDSET) 16.1. Construction The circuit mainly consists of DSP and RF unit as shown in the block diagram. 16.1.1. DSP:IC201 16.1.1.1. Function • • • • Battery Low, Power down defect circuit • • • • Ringer Generation •...

  • Page 62: Power Supply Circuit

    KX-TG2480BXS / KX-TGA248BXS 16.2. Power Supply Circuit Voltage is supplied separately to each block. Block Diagram (Handset Power) KEY, BACK +3.6V BATTERY LIGHT BATT+ +3.6V BATT- LEDS Q207 +3.0V REG +3.0V IC203 IC201 D213 CHARGE1 EEPROM IC202 D207 D208 Q212...

  • Page 63: Charge Circuit

    KX-TG2480BXS / KX-TGA248BXS 16.3. Charge Circuit When the handset is put on the cradle of the Base unit, the power is supplied from CHARGE2 and CHARGE1 terminals to charge the battery via D205 (D207), R268, Q212. The voltage between CHARGE2 and CHARGE1 flows D213 -> R248 -> Q207 ->...

  • Page 64: Sending Signal

    KX-TG2480BXS / KX-TGA248BXS 16.5. Sending Signal The voice signal from the microphone input to DSP (42-43). CN203 is the headset jack. When the headphone is connected, the Q206 detect it. The input from the microphone of the handset (MIN, MIP) is cut and the microphone signal from the headset is input to DSP (39).

  • Page 65: Ghz Mod/Demod Circuit (Handset Rf Part)

    KX-TG2480BXS / KX-TGA248BXS 16.7. 2.4GHz Mod/Demod Circuit (Handset RF Part) IC901 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27 of IC901, and then 2.4GHz TX modulated signal is output from pin1. This TX signal is filtered by BPF (FL901) and supplied to Antenna.

  • Page 66: Signal Route

    KX-TG2480BXS / KX-TGA248BXS 17 SIGNAL ROUTE Each signal route is as follows.

  • Page 67: Cpu Data (Base Unit)

    KX-TG2480BXS / KX-TGA248BXS 18 CPU DATA (BASE UNIT) 18.1. IC501 Description High High_Z Description High High_Z 63 NC 64 VREFR BELL_L1 65 RSSI RLY_L1 Off Hook On Hook 66 VCCR AC_DOWN High 67 GNDPLL _DET 68 VCCPLL KEY_STB_F Active 69 XOUT...

  • Page 68: Cpu Data (Handset)

    KX-TG2480BXS / KX-TGA248BXS Note: Description High High_Z • • • • The mark “*” in the I/O column means the port is 125 VCC 126 NC controlled by the firmware. 127 NC • • • • Data in the blank columns are omitted because of the 128 WDT CLK Analog I/O.

  • Page 69: Explanation Of Ic Terminals (Rf Unit)

    KX-TG2480BXS / KX-TGA248BXS 20 EXPLANATION OF IC TERMINALS (RF UNIT) 20.1. IC901...

  • Page 70: How To Replace A Flat Package Ic

    KX-TG2480BXS / KX-TGA248BXS 21 HOW TO REPLACE A 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 71: Flat Package Ic Installation Procedure

    KX-TG2480BXS / KX-TGA248BXS 21.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 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 72: Cabinet And Electrical Parts (Base Unit)

    KX-TG2480BXS / KX-TGA248BXS 22 CABINET AND ELECTRICAL PARTS (BASE UNIT)

  • Page 73: Cabinet And Electrical Parts (Handset)

    KX-TG2480BXS / KX-TGA248BXS 23 CABINET AND ELECTRICAL PARTS (HANDSET)

  • Page 74: Accessories And Packing Materials

    KX-TG2480BXS / KX-TGA248BXS 24 ACCESSORIES AND PACKING MATERIALS...
  • Page 75 KX-TG2480BXS / KX-TGA248BXS 25 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 25.1. Base Unit 25.2. Handset...

  • Page 76: Replacement Parts List

    KX-TG2480BXS / KX-TGA248BXS 26 REPLACEMENT PARTS Ref. Part No. Part Name & Description Remarks PQWE10027Z BATTERY TERMINAL LIST PQHR11127Z OPTIC CONDUCTIVE PARTS, LED LENS (CHARGE) Note: PQHR11128Z OPTIC CONDUCTIVE PARTS, LED LENS (LINE) 1. RTL (Retention Time Limited) PQSA10098R ANTENNA...
  • Page 77 KX-TG2480BXS / KX-TGA248BXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks (JACK AND CONNECTOR) R166 ERJ3GEYJ471 CN101 PQJJ2H004Z JACK R167 ERJ2GEJ102 CN201 K2LB102D0001 CONNECTOR R168 ERJ3GEY0R00 (COILS) R170 ERJ2GEJ561 L101 PQLQXF330K COIL...
  • Page 78 KX-TG2480BXS / KX-TGA248BXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R356 PQ4R10XJ120 C264 EEE1CA100SR R381 ERJ2GEJ332 3.3K C265 ECUV1C473KBV 0.047 R382 ERJ2GEJ472X 4.7K C266 EEE1CA100SR R383 ERJ2GEJ103 C267 ECUV1A224KBV 0.22 R387...
  • Page 79 KX-TG2480BXS / KX-TGA248BXS (Handset) (P.37). Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C960 ECUE1H100DCQ C962 ECUE1H100DCQ PCB100 PQWPG2480BXR MAIN P.C.BOARD ASS´Y (RTL) C963 ECUE1H100DCQ (ICs) C964 ECUV1H102KBV 0.001 IC201 C2HBBK000079 IC (*1)
  • Page 80 KX-TG2480BXS / KX-TGA248BXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R203 ERJ2GEJ331 C230 ECUE1C103KBQ 0.01 R204 ERJ2GEJ331 C231 ECUE1C103KBQ 0.01 R208 ERJ2GEJ121 C234 F1G1A1040003 R217 D1BB4303A055 430K C236 F1G1H4R0A445 R218 D1BB8203A055...

  • Page 81: Accessories And Packing Materials

    KX-TG2480BXS / KX-TGA248BXS 26.3. Accessories and Packing Materials Note: (*1) You can download and refer to the Operating Instructions (Instruction book) on TSN Server. Ref. Part No. Part Name & Description Remarks PQLV1BXY AC ADAPTOR PQJA10075Z CORD, TELEPHONE (6FT/2WIRE) PQJA10088Z...
  • Page 82 KX-TG2480BXS / KX-TGA248BXS Memo...

  • Page 83: For Schematic Diagram

    KX-TG2480BXS / KX-TGA248BXS 27 FOR SCHEMATIC DIAGRAM 27.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line. 2. This schematic diagram may be modified at any time with the development of new technology.

  • Page 84: Schematic Diagram (Base Unit)

    KX-TG2480BXS / KX-TGA248BXS 28 SCHEMATIC DIAGRAM (BASE UNIT) RF UNIT I/F PAD IC601 2.5V REG 2.5V VOUT C618 Cont K470P C763 RADIO_EN C774 C778 C773 C772 VCC 3.3V C770 C771 C769 R807 C768 C767 C762 C761 RSSI1 TXD2 C812 R805 K0.1...
  • Page 85 KX-TG2480BXS / KX-TGA248BXS 4.5V CONVERTOR 4.5V output 300kHz (or 500kHz) 4.5V Q301 L302 22uH 9~11V REFERENCE IC321 1XX : LINE 4.2V 3XX : POWER, CHARGE, RESET, PDWN DET X01- : POWER SUPPLY 4.2V VCC 3.3V X21- : CHARGE X41- : RESET, POW DOWN...

  • Page 86: Schematic Diagram (Handset)

    KX-TG2480BXS / KX-TGA248BXS 29 SCHEMATIC DIAGRAM (HANDSET) -16.5dBm OUT CN203 L206 C225 6V22 R232 HEADSET-DET Q206 MIC2 MIC1 L204 TP_ANT L205 -45dBm IN HEADSET-JACK HANDSET SP R226 RSSI TX_DATA R227 OSC_IN R321 (10) (11) RA201 MOD_EN C324 C321 IC206 4.7K...
  • Page 87 KX-TG2480BXS / KX-TGA248BXS RSSI C312 K0.1 L202 NC R276 560 R286 Q204 L203 NC 3.0V X201 13.824MHz R295 NC (10) (11) R242 R241 (12) (13) R222 (14) (15) (16) CHARGE_DET C216 6V22 C303 (17) MICM 81 RF_RESET VCCPLL -45dBm C214 K0.1...
  • Page 88 KX-TG2480BXS / KX-TGA248BXS...
  • Page 89 KX-TG2480BXS / KX-TGA248BXS IC151 IC601 Q161 D904 C911 L913 FL901 C913 D903 L904 Q108 C904 C910 R903 L901 Q142 Q104 R992 R991 L102 L101 CN201 CN101 Q800 FVCC RA501 Q241 LGS1 LOUT INT0 INT1 UVCC2 URX2 Q261 UTX2 TTS1 TTS2...
  • Page 90 KX-TG2480BXS / KX-TGA248BXS ANT1 ANTG1 PQUP11288Z TXD2 KIN1 KIN3 KIN2 URX1 UTX1 UGND1 UVCC1...
  • Page 91 KX-TG2480BXS / KX-TGA248BXS...
  • Page 92 KX-TG2480BXS / KX-TGA248BXS...
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