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Panasonic KX-TG5621BXS Service Manual

5.8 ghz digital cordless phone
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Telephone Equipment
KX-TG5621BXS
KX-TGA561BXS
5.8 GHz Digital Cordless Phone
Silver Version
(for Asia, Middle Near East and Other area)
© 2006 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. KM40602978CE
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-TG5621BXS

  • Page 1 ORDER NO. KM40602978CE Telephone Equipment KX-TG5621BXS KX-TGA561BXS 5.8 GHz Digital Cordless Phone Silver Version (for Asia, Middle Near East and Other area) © 2006 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    KX-TG5621BXS / KX-TGA561BXS 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-TG5621BXS / KX-TGA561BXS 21.2. IC801 28 REPLACEMENT PARTS LIST 21.3. IC851 28.1. Base Unit 22 HOW TO REPLACE THE FLAT PACKAGE IC 28.2. Handset 22.1. Preparation 28.3. Accessories and Packing Materials 22.2. How to Remove the IC 28.4. Fixtures and Tools 22.3.

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

    KX-TG5621BXS / KX-TGA561BXS 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-TG5621BXS / KX-TGA561BXS 1.2. How to Recognize that Pb Free Solder is Used (Example: Handset P.C.B.) Marked IC851 IC246 IC701 IC801 IC201 IC241 (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-TG5621BXS / KX-TGA561BXS 4 OPERATING INSTRUCTIONS 4.1. Battery 4.1.1. Battery Installation/Replacement 4.1.2. Battery Charge Note for service: The battery strength may not be indicated correctly if the battery is disconnected and connected again, even after it is fully charged. In that case, by recharging the battery as mentioned above, you will get a correct indication of the battery strength.

  • Page 7: Location Of Controls

    KX-TG5621BXS / KX-TGA561BXS 4.1.4. Panasonic Battery Performance 4.2. Location of Controls 4.2.1. Base Unit...

  • Page 8: Displays

    KX-TG5621BXS / KX-TGA561BXS 4.2.2. Handset 4.3. Displays 4.3.1. Display Items...
  • Page 9 KX-TG5621BXS / KX-TGA561BXS 4.3.2. Troubleshooting (Handset LCD)

  • Page 10: Settings

    KX-TG5621BXS / KX-TGA561BXS 4.4. Settings 4.4.1. Connecting the AC adaptor and telephone line cord...
  • Page 11 KX-TG5621BXS / KX-TGA561BXS 4.4.2. Programmable settings You can customize the unit by programming the following features using the handset. To access the features, there are 2 methods: scrolling through the display menus or using the direct commands. • Mainly the direct command method is used in this Service Manual.
  • Page 12 KX-TG5621BXS / KX-TGA561BXS 4.4.2.2. Programming using the Direct Commands...
  • Page 13 KX-TG5621BXS / KX-TGA561BXS 4.4.3. Dial Lock For Service Hint: *: If the current password is forgotten, enter “726276642” and you will be able to go to step 3.

  • Page 14: Troubleshooting

    KX-TG5621BXS / KX-TGA561BXS 4.5. Troubleshooting...
  • Page 15 KX-TG5621BXS / KX-TGA561BXS...

  • Page 16: Disassembly Instructions

    KX-TG5621BXS / KX-TGA561BXS 5 DISASSEMBLY INSTRUCTIONS 5.1. Base Unit Shown in Fig.- To Remove - Remove - Cabinet Cover Screws (2.6 × 12).....( A) × 4 Main P.C. Board Solders Main P.C. Board...

  • Page 17: Handset

    KX-TG5621BXS / KX-TGA561BXS 5.2. Handset Shown in Fig.- To Remove - Remove - Cabinet Cover Screws (2 × 14).....( B) × 2 Follow the procedure Main P.C. Board Tape and Solders Screws (2 × 9)....( C) × 3 Main P.C. Board...

  • Page 18: How To Replace The Handset Lcd

    KX-TG5621BXS / KX-TGA561BXS 6 HOW TO REPLACE THE HANDSET LCD...

  • Page 19: Troubleshooting Guide

    KX-TG5621BXS / KX-TGA561BXS 7 TROUBLESHOOTING GUIDE Cross Reference: Check Power (P.20) Check Battery Charge (P.21) Check Link (P.22) Check the RF part (P.23) Check Handset Transmission (P.29) Check Handset Reception (P.29) Check Caller ID (P.29)

  • Page 20: Check Power

    KX-TG5621BXS / KX-TGA561BXS 7.1. Check Power Cross Reference: Note: Power Supply Circuit (P.50) DSP is IC501. Reset Circuit (P.52) (*1) Refer to “SPECIFICATIONS” on cover page for part number and supply voltage of AC adaptor.

  • Page 21: Check Battery Charge

    KX-TG5621BXS / KX-TGA561BXS 7.2. Check Battery Charge Note: DSP is IC501.

  • Page 22: Check Link

    KX-TG5621BXS / KX-TGA561BXS 7.3. Check Link Note: DSP is IC501. (*1) Refer to Finding out the Defective part (P.23). Cross Reference: Check the RF part (P.23)

  • Page 23: Check The Rf Part

    KX-TG5621BXS / KX-TGA561BXS 7.4. Check the RF part 7.4.1. Finding out the Defective part After All the Checkings or Repairing 1. Re-register the checked Handset to the checked Base Unit, and Regular HS to Regular BU. Note: (*1) HS: Handset (*2) BU: Base Unit 7.4.1.1.
  • Page 24 KX-TG5621BXS / KX-TGA561BXS 7.4.2. RF Check Flowchart Each item (1 ~ 6) of RF Check Flowchart corresponds to Check Table for RF part (P.25). Please refer to the each item.
  • Page 25 KX-TG5621BXS / KX-TGA561BXS 7.4.3. Check Table for RF part Item BU (Base Unit) Check HS (HandSet) Check Link Confirmation Normal 1. Register Regular HS to BU (to be checked). 1. Register HS (to be checked) to Regular BU. 2. Press [Talk] key of the Regular HS to 2.
  • Page 26 KX-TG5621BXS / KX-TGA561BXS 7.4.4. TEST RANGE Check Circuit block which range is defective can be found by the following check. Item BU (Base Unit) Check HS (HandSet) Check Range Confirmation TX 1. Register Regular HS to BU (to be checked).
  • Page 27 KX-TG5621BXS / KX-TGA561BXS 7.4.5. RF-DSP Interface Signal Wave Form <Test Burst Mode>...
  • Page 28 KX-TG5621BXS / KX-TGA561BXS <Test Burst Mode>...

  • Page 29: Check Handset Transmission

    KX-TG5621BXS / KX-TGA561BXS 7.5. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.68). 7.6. Check Handset Reception Cross Reference: SIGNAL ROUTE (P.68). Note: When checking the RF part, Refer to Check the RF part (P.23) 7.7. Check Caller ID Cross Reference: Telephone Line Interface (P.53).

  • Page 30: Adjustment And Test Mode

    KX-TG5621BXS / KX-TGA561BXS 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. To short KIN3 to GND, refer to a method of connection of TEST_SW in “For Test Mode”...
  • Page 31 KX-TG5621BXS / KX-TGA561BXS 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. To short KIN3 to GND, refer to a method of connection of TEST_SW in “For Test Mode” in Base Unit Reference Drawing (P.39). -Insert AC adaptor during checking.
  • Page 32 KX-TG5621BXS / KX-TGA561BXS 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. To short KIN3 to GND, refer to a method of connection of TEST_SW in “For Test Mode” in Base Unit Reference Drawing (P.39). -Insert AC adaptor during checking.
  • Page 33 KX-TG5621BXS / KX-TGA561BXS 8.1.4. Adjustment Mode Cross Reference Check and Adjust X501 (Base Unit) Frequency (P.38) Note: (*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. To short KIN3 to GND, refer to a method of connection of TEST_SW in “For Test Mode” in Base Unit Reference Drawing (P.39). -Insert AC...

  • Page 34: Test Mode Flow Chart For Handset

    KX-TG5621BXS / KX-TGA561BXS 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.25) and RX-CW TEST Mode (P.31) for proper Base Unit settings.
  • Page 35 KX-TG5621BXS / KX-TGA561BXS 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.25) and Test Burst Mode (P.30) for proper Base Unit settings.
  • Page 36 KX-TG5621BXS / KX-TGA561BXS 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.25) and Test Link Mode (P.32) for proper Base Unit settings.
  • Page 37 KX-TG5621BXS / KX-TGA561BXS 8.2.4. Adjustment Mode Cross Reference (*1) Adjust Battery Low Detector Voltage (Handset) (P.38) Note: (*2) These are the default values. (*3) These values may not be fixed depending on the battery strength.

  • Page 38: X501 (Base Unit), X201 (Handset) Check

    KX-TG5621BXS / KX-TGA561BXS 8.3. X501 (Base Unit), X201 (Handset) Check Equipment: Frequency counter Check Point for measurement: BCK Checking tolerance: 13.824MHz ± 270Hz (Base Unit)/13.824MHz ± 100Hz (Handset) 8.3.1. Check and Adjust X501 (Base Unit) Frequency 1. Set up Base Unit in TEST mode.

  • Page 39: Base Unit Reference Drawing

    KX-TG5621BXS / KX-TGA561BXS CN661 L102 L101 Q142 Q156 P101 Q141 Q161...

  • Page 40: Handset Reference Drawing

    KX-TG5621BXS / KX-TGA561BXS...

  • Page 41: Frequency Table

    KX-TG5621BXS / KX-TGA561BXS 8.7. Frequency Table 8.7.1. Base Unit Channel TX/RX Frequency (MHz) Channel TX/RX Frequency (MHz) Channel TX/RX Frequency (MHz) 5759.702398 5788.242242 5816.782086 5760.592291 5789.132135 5817.671978 5761.486139 5790.025982 5818.565826 5762.376031 5790.915875 5819.455719 5763.269879 5791.809723 5820.349566 5764.159771 5792.699615 5821.239459 5765.053619 5793.593463...
  • Page 42 KX-TG5621BXS / KX-TGA561BXS 8.7.2. Handset Channel TX/RX Frequency (MHz) Channel TX/RX Frequency (MHz) Channel TX/RX Frequency (MHz) 5759.700425 5788.240269 5816.780113 5760.594273 5789.134117 5817.673960 5761.484165 5790.024009 5818.563853 5762.378013 5790.917857 5819.457701 5763.267906 5791.807749 5820.347593 5764.161753 5792.701597 5821.241441 5765.051646 5793.591490 5822.131333 5765.945494 5794.485337 5823.025181...

  • Page 43: How To Clear User Setting (Handset Only)

    KX-TG5621BXS / KX-TGA561BXS 8.8. How to Clear User Setting (Handset Only) Units are reset to the Factory settings by this operation (Erase stored Phone numbers, Caller list and etc.). This operation should not be performed for a usual repair. Note: (*1) Be sure to short the battery terminals of the Handset with a lead wire, etc.

  • Page 44: Description

    KX-TG5621BXS / KX-TGA561BXS 9 DESCRIPTION 9.1. Frequency The frequency range of 5.76GHz-5.84GHz is used. Transmitting and receiving channel between Base Unit and Handset is same frequency. Refer to Frequency Table (P.41). 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 telephone system that can use multiple portable unit simultaneously.
  • Page 45 KX-TG5621BXS / KX-TGA561BXS 9.2.1. TDD Frame Format Sync Field (72bit): Preamble 56bit + SyncWord 16bit Base Unit (Handset) adjusts the timing of reception so that reception of Base Unit (Handset) can correspond to transmission of Handset (Base Unit). It is necessary for sync-field that Handset gets synchronization.

  • Page 46: Signal Flowchart In The Whole System

    KX-TG5621BXS / KX-TGA561BXS 9.3. Signal Flowchart in the Whole System Reception CN101 of the Base Unit is connected to the TEL line, and signal is enter through the bridge diode D101. While talking, the relay (Q141) is turned ON and amplified at the Q171, then led to DSP (IC501). The DSP encodes ADPCM and TDD/TDMA with FHSS to TXMOD.

  • Page 47: Explanation Of Link Data Communication

    KX-TG5621BXS / KX-TGA561BXS 10 EXPLANATION OF LINK DATA COMMUNICATION 10.1. Calling 10.2. To Terminate Communication 10.3. Ringing...
  • Page 48 KX-TG5621BXS / KX-TGA561BXS...

  • Page 49: Circuit Operation (Base Unit_Main)

    KX-TG5621BXS / KX-TGA561BXS 12 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: Power Supply Circuit

    KX-TG5621BXS / KX-TGA561BXS 12.3. Power Supply Circuit Function: The power supply voltage from AC adaptor is converted to the desired voltage of each block. Circuit Operation: • Q300 and IC300: 4.0V DCDC Converter • IC331: 3.3V Regulator...
  • Page 51 KX-TG5621BXS / KX-TGA561BXS 12.3.1. Charge Circuit The voltage from the AC adaptor is supplied to the charge circuits. Main charge (130~220mA at the Battery) of maximum 7- 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-TG5621BXS / KX-TGA561BXS 12.4. 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 53: Telephone Line Interface

    KX-TG5621BXS / KX-TGA561BXS 12.5. 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 54: Parallel Connection Detect Circuit

    KX-TG5621BXS / KX-TGA561BXS 12.6. Parallel Connection Detect Circuit Function: In order to disable call waiting and stutter tone functions when using telephones connected in parallel, it is necessary to have a circuit that judges whether a telephone connected in parallel is in use or not. This circuit determines whether the telephone connected in parallel is on hook or off hook by detecting changes in the T/R voltage.

  • Page 55: Calling Line Identification (Caller Id)

    KX-TG5621BXS / KX-TGA561BXS 12.7. 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 56 KX-TG5621BXS / KX-TGA561BXS TC_CTRL RSTN RXEN TXEN REFIN RXGAIN RXEN TXEN 5.8GHz...
  • Page 57 KX-TG5621BXS / KX-TGA561BXS TC_CTRL RSTN RXEN TXEN REFIN RXGAIN RXEN TXEN 5.8GHz...

  • Page 58: Circuit Operation (Rf Part)

    KX-TG5621BXS / KX-TGA561BXS 15 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 59: Power Supply Circuit

    KX-TG5621BXS / KX-TGA561BXS 15.1. Power Supply Circuit As indicated below, the various voltages are supplied to each block. V_PA, about 4.0V at Base Unit or 3.3V at Handset, is supplied to the Power amplifier in 5.8GHz PA circuit. IC841 is 3.0V Regulators, and IC761 is a 2.5V Regulator. They output Vcc_5.8GHz, and Vcc_2.4GHz respectively by order of...

  • Page 60: Ghz Mod/Demod Circuit

    KX-TG5621BXS / KX-TGA561BXS 15.2. 2.4GHz Mod/Demod Circuit IC701 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27 of IC701, and then 2.4GHz TX modulated signal is output from pin1. This TX signal goes into the 5.8GHz Converter circuit. 2.4GHz RX signal from 5.8GHz Converter circuit is passed through matching circuit and supplied to pin4 of IC701, then demodulated signal...

  • Page 61: Ghz Converter Circuit

    KX-TG5621BXS / KX-TGA561BXS 15.3. 5.8GHz Converter Circuit This block converts frequency of TX signal and RX signal. IC801 includes TX-MIXER, RX-MIXER, PLL and VCO modules internally. The VCO module is tuned by PLL synthesizer module, and generates 3.4GHz Local signal. Reference clock (13.824MHz) from DSP block is supplied to pin7 of IC701.

  • Page 62: Ghz Pa (Power Amplifier), 5.8Ghz Lna (Low Noise Amplifier) And Antenna Switch Circuit

    KX-TG5621BXS / KX-TGA561BXS 15.4. 5.8GHz PA (Power Amplifier), 5.8GHz LNA (Low Noise Amplifier) and Antenna Switch Circuit PA block amplifies power of 5.8GHz TX signal. 5.8GHz TX signal from 5.8GHz Converter circuit is filtered by 5.8GHz-BPF FL811, and amplified by Power amplifier (PA) block of IC851, After that, it is supplied to Antenna Switch block of IC851.

  • Page 63: Block Diagram (Handset)

    KX-TG5621BXS / KX-TGA561BXS 16 BLOCK DIAGRAM (HANDSET) IC241 X201 EEPROM 13.824MHz Q231 CHG_DET CHARGE DETECT OSC_IN Q362, Q363 RF part TX_DATA RX_DATA CHARGE CHG_CTL PA_CONT CONTROL RADIO_EN CON_EN Q221 SYN_LE2 SYN_OUT RESET RESET SYN_DATA Q361 CHARGE SYN_CLK SYN_LE1 IC221 RX_GAIN...

  • Page 64: Circuit Operation (Handset)

    KX-TG5621BXS / KX-TGA561BXS 17 CIRCUIT OPERATION (HANDSET) 17.1. Construction The circuit mainly consists of DSP and RF part as shown in the block diagram. 17.1.1. DSP: IC201 Function • Battery Low, Power down detect circuit • Ringer Generation • Interface circuit...

  • Page 65: Power Supply Circuit

    KX-TG5621BXS / KX-TGA561BXS 17.2. 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 REG +3.0V IC371 Q361 +3.0VA D353 CHARGE2 IC201 +3.0VD CHARGE1 EEPROM IC241 R318...

  • Page 66: Charge Circuit

    KX-TG5621BXS / KX-TGA561BXS 17.3. Charge Circuit When the Handset is put on the cradle of the Base unit or the charger, the power is supplied from CHARGE+ and CHARGE- terminals to charge the battery via D353 and R366 or Q361. The voltage between CHARGE+ and CHARGE- flows R231 →...

  • Page 67: Sending Signal

    KX-TG5621BXS / KX-TGA561BXS 17.5. Sending Signal The voice signal from the microphone is input to DSP (90, 91). CN331 is the headset jack. When the headphone is connected, the Q331 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 (95).

  • Page 68: Signal Route

    KX-TG5621BXS / KX-TGA561BXS 18 SIGNAL ROUTE Each signal route is as follows. RF part signal route...

  • Page 69: Cpu Data (Base Unit)

    KX-TG5621BXS / KX-TGA561BXS 19 CPU DATA (BASE UNIT) 19.1. IC501 Description High High_Z Description High High_Z GNDPA 63 KEY_IN3 Key In SPOUTP 64 KEY_IN2 Key In BMCCLK 65 KEY_IN1 Key In TXMOD 66 GND RSSI 67 VCC 68 TCK XOUT...

  • Page 70: Cpu Data (Handset)

    KX-TG5621BXS / KX-TGA561BXS 20 CPU DATA (HANDSET) 20.1. IC201 Description High High_Z Description High High_Z GNDPA 59 DOT_LCD_ POWER_SW SPOUTP 60 ANT_LED1 BCLK 61 ANT_LED2 RSSI 62 ANT_LED3 63 KEYSTROBE Active XOUT 64 KEYSTROBE Active VCCIN 65 KEYSTROBE Active 10 DCDCGND...

  • Page 71: Explanation Of Ic Terminals (Rf Part)

    KX-TG5621BXS / KX-TGA561BXS 21 EXPLANATION OF IC TERMINALS (RF PART) 21.1. IC701...

  • Page 72: Ic801

    KX-TG5621BXS / KX-TGA561BXS 21.2. IC801 Backside Terminal: GND...

  • Page 73: Ic851

    KX-TG5621BXS / KX-TGA561BXS 21.3. IC851 Backside Terminal: GND...

  • Page 74: How To Replace The Flat Package Ic

    KX-TG5621BXS / KX-TGA561BXS 22 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 75: How To Install The Ic

    KX-TG5621BXS / KX-TGA561BXS 22.3. 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 76: How To Replace The Llp (Leadless Leadframe Package)

    KX-TG5621BXS / KX-TGA561BXS 23 HOW TO REPLACE THE LLP (Leadless Leadframe Package) IC 23.1. 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 77: How To Install The Ic

    KX-TG5621BXS / KX-TGA561BXS 23.4. 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. 2. Place the solder a little on the land where IC pins are to be attached, then place the IC.

  • Page 78: Cabinet And Electrical Parts (Base Unit)

    KX-TG5621BXS / KX-TGA561BXS 24 CABINET AND ELECTRICAL PARTS (BASE UNIT)

  • Page 79: Cabinet And Electrical Parts (Handset)

    KX-TG5621BXS / KX-TGA561BXS 25 CABINET AND ELECTRICAL PARTS (HANDSET) Note: (*1) This cable is fixed by welding. Refer to “HOW TO REPLACE THE HANDSET LCD” (P.18) (*2) Stick the magnetic shield (No. 119) to the exact location discribed above. (*3) Attach the spacer (No. 125) to the exact location described above.

  • Page 80: Accessories And Packing Materials

    KX-TG5621BXS / KX-TGA561BXS 26 ACCESSORIES AND PACKING MATERIALS...

  • Page 81: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG5621BXS / KX-TGA561BXS 27 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 27.1. Base Unit 27.2. Handset...
  • Page 82 KX-TG5621BXS / KX-TGA561BXS 28 REPLACEMENT PARTS LIST Note: Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) PQHA10017Z RUBBER PARTS, LEG CUSHION The marking (RTL) indicates that the Retention Time is PQKF10660Y1 CABINET COVER PS-HB PQGT18847Z NAME PLATE limited for this item.
  • Page 83 KX-TG5621BXS / KX-TGA561BXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks (VARISTORS) R865 ERJ2GEJ271 SA101 J0LE00000047 VARISTOR (SURGE ABSORBER) (CAPACITORS) SA104 J0LE00000047 VARISTOR (SURGE ABSORBER) C101 F1K2J681A006 680P (RESISTORS) C102 F1K2J681A006 680P...
  • Page 84 KX-TG5621BXS / KX-TGA561BXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C733 ECJ0EB1H102K 0.001 PQHG10703Z RUBBER PARTS, SPEAKER C734 ECJ0EB1H102K 0.001 L0AD02A00026 SPEAKER C735 ECJ0EB1A104K PQKE10395Z1 COVER, EARPHONE C737 ECJ0EB1H102K 0.001 PQMC10496Z...
  • Page 85 KX-TG5621BXS / KX-TGA561BXS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks LED261 B3AZB0000032 R832 ERJ2GEJ562X 5.6K (COILS) R834 ERJ2GEJ332 3.3K L326 G1CR47J00005 COIL R864 ERJ2GEJ102 L327 G1CR47J00005 COIL R865 ERJ2GEJ391 L331 PQLQR2KB113T...
  • Page 86 KX-TG5621BXS / KX-TGA561BXS Ref. Part No. Part Name & Description Remarks 28.4. Fixtures and Tools C752 ECJ0EB1H471K 470P Note: C763 ECUV1A474KBV 0.47 C764 ECJ0EC1H020C When replacing the Handset LCD, See HOW TO C773 ECJ0EC1H101J 100P REPLACE THE HANDSET LCD (P.18).
  • Page 87 KX-TG5621BXS / KX-TGA561BXS 29 FOR SCHEMATIC DIAGRAM 29.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN)) Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line. 2. This schematic diagrams may be modified at any time with the development of new technology.
  • Page 88 KX-TG5621BXS / KX-TGA561BXS 30 SCHEMATIC DIAGRAM (BASE UNIT_MAIN) ANT0 ANT1 CON_EN V_RF V_RF (VPA) V_RF V_RF RADIO_EN RADIO_EN PA_CONT PA_CONT SYN_LE2 SYN_LE2 SYN_OUT SYN_OUT SYN_DATA SYN_DATA SYN_CLK SYN_CLK SYN_LE1 SYN_LE1 TX_DATA TX_DATA RX_GAIN RX_GAIN RX_EN RX_EN 3.3V TX_EN TX_EN SHCTRL...
  • Page 89 KX-TG5621BXS / KX-TGA561BXS 4.0V 4.0V CONVERTOR IC331 Q300 CPH3314 L300 22uH VOUT VDET *RESET REFERENCE 1XX : TEL LINE 3XX : POWER, CHARGE 4XX : RESET, MIC, SP 5XX : DSP, RF I/F IC300 6XX : FLASH, KEY, LCD ON/*OFF 7XX : RF(2.4G)
  • Page 90 KX-TG5621BXS / KX-TGA561BXS 31 SCHEMATIC DIAGRAM (BASE UNIT_RF PART) 4.0V 3.0V R864 R863 5.8GHz RF FL891 5.8GHz_LPF FL811 TRSW_IN VDD_PA 5.8GHz_BPF R813 3.0V GND_ISO1 PA_IN C891 ANT1 PA_EN 5.8GHz RF VCC_PA1 SYN_CLK GND_ISO2 IC851 ANTSEL_A GND_ISO3 ANTSEL_B C881 5.8G_PA VCC_PA2...
  • Page 91 KX-TG5621BXS / KX-TGA561BXS L860 PA_CONT CON_EN IC841 IC761 4.0V 3.0V_REG 2.5V_REG C766 C846 RADIO_EN L768 VRF(3.0V) VRF(2.5V) VOUT VOUT SYN_LE2 SYN_OUT SYN_DATA SYN_LE1 SYN_CLK C714 K1000P C707 K1000P C751 D10P 2.5V C708 C1.5P C713 D10P K470P C752 C735 K0.1 R747...
  • Page 92 KX-TG5621BXS / KX-TGA561BXS 32 SCHEMATIC DIAGRAM (HANDSET_MAIN) OSC_IN RSSI RSSI TX_DATA TX_DATA PA_CONT PA_CONT RX_EN RX_EN TX_EN TX_EN RX_GAIN RX_GAIN RX_DATA RX_DATA CON_EN CON_EN SYN_LE2 SYN_LE2 RADIO_EN SHCTRL SHCTRL RF_RESET RF_RESET SYN_DATA SYN_DATA SYN_LE1 IC246 SYN_LE1 SYN_CLK SYN_CLK SYN_OUT SYN_OUT...
  • Page 93 KX-TG5621BXS / KX-TGA561BXS TEST SIGNAL FREQUENCY:1KHz SP phone RX (MIC Mute: ON) 1.8Vp-p/8 (Vol.MAX) L327 470nH L326 470nH SP-phone Headset TX -37dBm/600 R331 50mVp-p R340 R227 100k CN331 R225 L331 C340 K0.1 Q331 X201 L332 C335 13.824MHZ L334 R201 22uF...
  • Page 94 KX-TG5621BXS / KX-TGA561BXS 33 SCHEMATIC DIAGRAM (HANDSET_RF PART) 3.3V 3.0V R863 R864 3.0V 5.8GHz TX TRSW_IN VDD_PA FL811 5.8GHz_BPF R813 5.8GHz RF GND_ISO1 PA_IN ANT1 PA_EN C891 IC851 VCC_PA1 SYN_CLK GND_ISO2 ANTSEL_A 5.8G_PA GND_ISO3 ANTSEL_B C881 VCC_PA2 VCC_TXRX ANT2 LNA_EN...
  • Page 95 KX-TG5621BXS / KX-TGA561BXS L860 PA_CONT CON_EN 3.6~4.2V IC841 IC761 3.0V_REG 2.5V_REG C766 C846 RADIO_EN L768 VRF(3.0V) VRF(2.5V) VOUT VOUT SYN_LE2 SYN_OUT SYN_DATA 2.5V SYN_LE1 SYN_CLK C707 K1000P C714 K1000P C751 D10P C713 C708 C1.5P D10P C752 K470P C735 K0.1 R747...
  • Page 96 KX-TG5621BXS / KX-TGA561BXS Memo...
  • Page 97 KX-TG5621BXS / KX-TGA561BXS CN661 L102 L101 Q142 Q156 P101 Q141 Q161...
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  • Page 104 KX-TG5621BXS / KX-TGA561BXS I.N./N KXTG5621BXS KXTGA561BXS...

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