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Panasonic KX-TG5571BXM Service Manual
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Panasonic KX-TG5571BXM Service Manual

Panasonic KX-TG5571BXM Service Manual

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Telephone Equipment
KX-TG5571BXM
KX-TGA550BXM
Expandable Digital Cordless Answering
System
Metallic Gray 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. KM40502620CE
Unauthorized
copying
and

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Summary of Contents for Panasonic KX-TG5571BXM

  • Page 1 ORDER NO. KM40502620CE Telephone Equipment KX-TG5571BXM KX-TGA550BXM Expandable Digital Cordless Answering System Metallic Gray 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-TG5571BXM / KX-TGA550BXM 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-TG5571BXM / KX-TGA550BXM 17.4. Ringer and Handset SP-Phone 29.1. Base Unit 17.5. Sending Signal 29.2. Handset 17.6. Reception Signal 29.3. Charger Unit 18 CIRCUIT OPERATION (CHARGER UNIT) 29.4. Accessories and Packing Materials 19 SIGNAL ROUTE 30 FOR SCHEMATIC DIAGRAM 20 CPU DATA (BASE UNIT) 30.1.

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

    KX-TG5571BXM / KX-TGA550BXM 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-TG5571BXM / KX-TGA550BXM 1.2. How to Recognize that Pb Free Solder is Used (Example: Handset P.C.B.) C361 C241 JTAG C264 VBAT1 C209 R263 C242 R354 VBAT2 R242 D354 IC371 IC381 R241 C263 R206 R262 R261 C354 C206 C371 R207 R352...

  • Page 6: Operating Instructions

    KX-TG5571BXM / KX-TGA550BXM 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...
  • Page 7 KX-TG5571BXM / KX-TGA550BXM 4.1.4. Battery Strength 4.1.5. Battery Replacement 4.1.6. Battery Performance...

  • Page 8: Location Of Controls

    KX-TG5571BXM / KX-TGA550BXM 4.2. Location of Controls 4.2.1. Base Unit...
  • Page 9 KX-TG5571BXM / KX-TGA550BXM 4.2.2. Handset 4.2.3. Charger Unit (for Optional Handset)

  • Page 10: Displays

    KX-TG5571BXM / KX-TGA550BXM 4.3. Displays 4.3.1. Display Items 4.3.2. Menu Icons...
  • Page 11 KX-TG5571BXM / KX-TGA550BXM 4.3.3. Troubleshooting (Handset LCD)
  • Page 12 KX-TG5571BXM / KX-TGA550BXM...

  • Page 13: Settings

    KX-TG5571BXM / KX-TGA550BXM 4.4. Settings 4.4.1. Connections...
  • Page 14 KX-TG5571BXM / KX-TGA550BXM 4.4.2. Guide to Handset Programming...
  • Page 15 KX-TG5571BXM / KX-TGA550BXM...
  • Page 16 KX-TG5571BXM / KX-TGA550BXM 4.4.3. Dial Lock For Service Hint: *: If the current password is forgotten, enter “726276642” and you will be able to go to next step.
  • Page 17 KX-TG5571BXM / KX-TGA550BXM 4.4.4. Direct Commands...
  • Page 18 KX-TG5571BXM / KX-TGA550BXM...
  • Page 19 KX-TG5571BXM / KX-TGA550BXM...

  • Page 20: Troubleshooting

    KX-TG5571BXM / KX-TGA550BXM 4.5. Troubleshooting If the handset display shows error messages, see “Troubleshooting (Handset LCD) (P.11)” for the Cause & Solution.
  • Page 21 KX-TG5571BXM / KX-TGA550BXM...
  • Page 22 KX-TG5571BXM / KX-TGA550BXM...
  • Page 23 KX-TG5571BXM / KX-TGA550BXM...
  • Page 24 KX-TG5571BXM / KX-TGA550BXM...

  • Page 25: Disassembly Instructions

    KX-TG5571BXM / KX-TGA550BXM 5 DISASSEMBLY INSTRUCTIONS 5.1. Base Unit Shown in Fig.- To Remove - Remove - Cabinet Cover Screws (2.6 × 12)..(A) × 5 Main P. C. Board Tapes, Solders and Cable Main P. C. Board Operational P. C. Board Tape Screws (2.6 ×...

  • Page 26: Handset

    KX-TG5571BXM / KX-TGA550BXM 5.2. Handset Shown in Fig.- To Remove - Remove - Cabinet Cover Screws (2 × 14)..(C) × 2 Follow the procedure. Main P. C. Board Tape and Solders Screws (2 × 9).....(D ) × 3 Main P. C. Board...

  • Page 27: Charger Unit

    KX-TG5571BXM / KX-TGA550BXM 5.3. Charger Unit Shown in Fig.- To Remove - Remove - Cabinet Cover Screws (2.6 × 12)..(E) × 2 Main P.C.Board Main P.C.Board...

  • Page 28: Assembly Instructions

    KX-TG5571BXM / KX-TGA550BXM 6 ASSEMBLY INSTRUCTIONS 6.1. Fix the LCD and the Receiver Guide to the Main P.C. Board (Handset)

  • Page 29: Troubleshooting Guide

    KX-TG5571BXM / KX-TGA550BXM 7 TROUBLESHOOTING GUIDE Cross Reference: Note: Check Power (P.30) (*1) When a user claims that the unit disconnects a call right after the greeting message and no incoming Error Message Table (P.30) messages can be recorded, this symptom can not be Check Playback (P.32)

  • Page 30: Check Power

    KX-TG5571BXM / KX-TGA550BXM 7.1. Check Power Cross Reference: Note: Power Supply Circuit (P.63) Flash Memory is IC601. Reset Circuit (P.65) DSP is IC501. 7.2. Error Message Table Display Symptom Remedy The initialization was tried, but it could not be done.

  • Page 31: Check Record

    KX-TG5571BXM / KX-TGA550BXM 7.3. Check Record c) How to change the Auto Disconnect activation (time) Some Telephone Company lines (fiber or cable) ON Hook and OFF Hook voltages are lower than conventional lines, which may cause a malfunction of Auto Disconnect detection. To solve this problem, try changing the Auto Disconnect activation through the procedures below.

  • Page 32: Check Playback

    KX-TG5571BXM / KX-TGA550BXM 7.4. Check Playback Cross Reference: Note: Power Supply Circuit (P.63) Flash Memory is IC601. DSP is IC501. 7.5. Check Sp-phone Transmission Cross Reference: Note: SIGNAL ROUTE (P.84) Flash Memory is IC601. Telephone Line Interface (P.66) DSP is IC501.

  • Page 33: Check Sp-Phone Reception

    KX-TG5571BXM / KX-TGA550BXM 7.6. Check Sp-phone Reception Cross Reference: Note: Telephone Line Interface (P.66) Flash Memory is IC601. SIGNAL ROUTE (P.84) DSP is IC501. 7.7. Check Battery Charge Note: Flash Memory is IC601. DSP is IC501.

  • Page 34: Check Link

    KX-TG5571BXM / KX-TGA550BXM 7.8. Check Link Note: Flash Memory is IC601. DSP is IC501. (*1) Refer to Finding out the Defective part (P.35). Cross Reference: Check the RF part (P.35)

  • Page 35: Check The Rf Part

    KX-TG5571BXM / KX-TGA550BXM 7.9. Check the RF part 7.9.1. Finding out the Defective part After All the Checkings or Repairing 1. After all the checkings or repairing, cancel the Registration of Regular HS to checked Base Unit, and checked Handset to Regular BU.
  • Page 36 KX-TG5571BXM / KX-TGA550BXM 7.9.1.1. Canceling the Handset Registration 7.9.1.2. Reregistering the Handset...
  • Page 37 KX-TG5571BXM / KX-TGA550BXM 7.9.2. RF Check Flowchart Each item (1 ~ 6) of RF Check Flowchart corresponds to Check Table for RF part (P.38). Please refer to the each item.
  • Page 38 KX-TG5571BXM / KX-TGA550BXM 7.9.3. 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 39 KX-TG5571BXM / KX-TGA550BXM 7.9.4. 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 40 KX-TG5571BXM / KX-TGA550BXM 7.9.5. RF-DSP Interface Signal Wave Form <Test Burst Mode>...
  • Page 41 KX-TG5571BXM / KX-TGA550BXM <Test Burst Mode>...

  • Page 42: Check Handset Transmission

    KX-TG5571BXM / KX-TGA550BXM 7.10. Check Handset Transmission Cross Reference: SIGNAL ROUTE (P.84). 7.11. Check Handset Reception Cross Reference: SIGNAL ROUTE (P.84). Note: When checking the RF part, Refer to Check the RF part (P.35) 7.12. Check Caller ID Cross Reference: Telephone Line Interface (P.66).

  • Page 43: Adjustment And Test Mode

    KX-TG5571BXM / KX-TGA550BXM 8 ADJUSTMENT AND TEST MODE 8.1. Test Mode Flow Chart for Base Unit 8.1.1. Test Burst Mode Note: (*1) LCD displays the Channel number. (*2) Refer to Check Table for RF part (P.38) and RX-CW Test Mode (P.48) for proper Handset settings.
  • Page 44 KX-TG5571BXM / KX-TGA550BXM 8.1.2. RX-CW Test Mode Note: (*1) LCD displays the Channel number. (*2) Refer to Check Table for RF part (P.38) and Test Burst Mode (P.47) for proper Handset settings.
  • Page 45 KX-TG5571BXM / KX-TGA550BXM 8.1.3. Test Link Mode Note: (*1) LCD displays the Channel number. (*2) LCD displays the number of selected power. (*3) Refer to Check Table for RF part (P.38) and Test Link Mode (P.49) for proper Handset settings.
  • Page 46 KX-TG5571BXM / KX-TGA550BXM 8.1.4. Adjustment Mode Cross Reference Check and Adjust X501 (Base Unit) Frequency (P.51) Note: (*1) This is an adjustment value (hex.).

  • Page 47: Test Mode Flow Chart For Handset

    KX-TG5571BXM / KX-TGA550BXM 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.38) and RX-CW Test Mode (P.44) for proper Base Unit settings.
  • Page 48 KX-TG5571BXM / KX-TGA550BXM 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.38) and Test Burst Mode (P.43) for proper Base Unit settings.
  • Page 49 KX-TG5571BXM / KX-TGA550BXM 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.38) and Test Link Mode (P.45) for proper Base Unit settings.
  • Page 50 KX-TG5571BXM / KX-TGA550BXM 8.2.4. Adjustment Mode Cross Reference (*1) Adjust Battery Low Detector Voltage (Handset) (P.51) Note: (*2) These are the default values. (*3) These values may not be fixed depending on the battery strength.

  • Page 51: X501 (Base Unit), X201 (Handset) Check

    KX-TG5571BXM / KX-TGA550BXM 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 52: Base Unit Reference Drawing

    KX-TG5571BXM / KX-TGA550BXM CN661 L102 Q156 L101 Q161 P101 C166 Q142 Q141 C161 CN301...

  • Page 53: Handset Reference Drawing

    KX-TG5571BXM / KX-TGA550BXM LED261 PQUP 11292Z Q871 IC841 IC761 R286 C286 C279 C284 C283 C278 C277 C275 C274 Q331 RECEIVER IC261 Q231 RA255 Q262 Q261 RA201 Q221 Q251 RA251 Q243 Q362 Q361 Q363 CHG2 CHG1...

  • Page 54: Frequency Table

    KX-TG5571BXM / KX-TGA550BXM 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 55 KX-TG5571BXM / KX-TGA550BXM 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 56: How To Clear User Setting

    KX-TG5571BXM / KX-TGA550BXM 8.8. How to Clear User Setting Units are reset to the Factory settings by this operation (Erase recorded Voice messages, stored Phone numbers, Caller list and etc.). This operation should not be performed for a usual repair.

  • Page 57: Description

    KX-TG5571BXM / KX-TGA550BXM 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.54). 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 58 KX-TG5571BXM / KX-TGA550BXM 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 59: Signal Flowchart In The Whole System

    KX-TG5571BXM / KX-TGA550BXM 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 60: Explanation Of Link Data Communication

    KX-TG5571BXM / KX-TGA550BXM 10 EXPLANATION OF LINK DATA COMMUNICATION 10.1. Calling 10.2. To Terminate Communication 10.3. Ringing...
  • Page 61 KX-TG5571BXM / KX-TGA550BXM...

  • Page 62: Circuit Operation (Base Unit_Main)

    KX-TG5571BXM / KX-TGA550BXM 12 CIRCUIT OPERATION (BASE UNIT_MAIN) General Description: (DSP, Flash Memory) is a digital speech/signal processing system that implements all the functions of speech compression, record and playback, and memory management required in a digital telephone answering machine.

  • Page 63: Power Supply Circuit

    KX-TG5571BXM / KX-TGA550BXM 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 64 KX-TG5571BXM / KX-TGA550BXM 12.3.1. Charge Circuit The voltage from the AC is supplied to the charge circuits. Main charge (180mA at the Battery) 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 65: Reset Circuit

    KX-TG5571BXM / KX-TGA550BXM 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 66: Intercom Mode

    KX-TG5571BXM / KX-TGA550BXM 12.5. Intercom Mode 1. Press the Base Unit INTERCOM button, and the handset number button ([1] to [8]), then a monitor tone is heard from the speaker. 2. At the same time, the Handset ring. This status is called “Intercom stand-by”.

  • Page 67: Auto Disconnect Circuit

    KX-TG5571BXM / KX-TGA550BXM 12.7. Auto Disconnect Circuit Function: This circuit is used to detect the fact that another telephone connected to the same line is OFF-HOOK while the unit is in a receiving status or OGM transmitting status. Circuit Operation: The voltage of pin 35 of IC501 is monitored.

  • Page 68: Parallel Connection Detect Circuit

    KX-TG5571BXM / KX-TGA550BXM 12.8. 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 69: Calling Line Identification (Caller Id)

    KX-TG5571BXM / KX-TGA550BXM 12.9. 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 70 KX-TG5571BXM / KX-TGA550BXM TC_CTRL RSTN RXEN TXEN REFIN RXGAIN RXEN TXEN 5.8GHz...
  • Page 71 KX-TG5571BXM / KX-TGA550BXM TC_CTRL RSTN RXEN TXEN REFIN RXGAIN RXEN TXEN 5.8GHz...

  • Page 72: Circuit Operation (Rf Part)

    KX-TG5571BXM / KX-TGA550BXM 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 73: Power Supply Circuit

    KX-TG5571BXM / KX-TGA550BXM 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 74: Ghz Mod/Demod Circuit

    KX-TG5571BXM / KX-TGA550BXM 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 75: Ghz Converter Circuit

    KX-TG5571BXM / KX-TGA550BXM 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 76: Ghz Lna (Low Noise Amplifier) Circuit

    KX-TG5571BXM / KX-TGA550BXM 15.4. 5.8GHz LNA (Low Noise Amplifier) Circuit This block amplifies receiving 5.8GHz signal. 5.8GHz RX signal from Antenna Switch circuit amplified by LNA (Low Noise Amplifier) Q871 and filtered by HPF (FL821), and then supplied to 5.8GHz Converter circuit.

  • Page 77: Ghz Power Amplifier And Antenna Switch Circuit

    KX-TG5571BXM / KX-TGA550BXM 15.5. 5.8GHz Power Amplifier and Antenna Switch Circuit This 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, and then passes through internal 5.8GHz-BPF. After that, it is supplied to Antenna Switch block of IC851.

  • Page 78: Block Diagram (Handset)

    KX-TG5571BXM / KX-TGA550BXM 16 BLOCK DIAGRAM (HANDSET) IC246 IC241 X201 FLASH EEPROM 13.824MHz MEMORY 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...

  • Page 79: Circuit Operation (Handset)

    KX-TG5571BXM / KX-TGA550BXM 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 80: Power Supply Circuit

    KX-TG5571BXM / KX-TGA550BXM 17.2. Power Supply Circuit Voltage is supplied separately to each block.

  • Page 81: Charge Circuit

    KX-TG5571BXM / KX-TGA550BXM 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 R368 or Q361. The voltage between CHARGE+ and CHARGE- flows R231 →...

  • Page 82: Sending Signal

    KX-TG5571BXM / KX-TGA550BXM 17.5. Sending Signal The voice signal from the microphone is input to DSP (89, 90). 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 (94).

  • Page 83: Circuit Operation (Charger Unit)

    KX-TG5571BXM / KX-TGA550BXM 18 CIRCUIT OPERATION (CHARGER UNIT) The voltage from the AC is supplied to the charge circuits. Main charge (180mA at the Battery) 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 84: Signal Route

    KX-TG5571BXM / KX-TGA550BXM 19 SIGNAL ROUTE Each signal route is as follows.
  • Page 85 KX-TG5571BXM / KX-TGA550BXM Each signal route is as follows. RF part signal route...

  • Page 86: Cpu Data (Base Unit)

    KX-TG5571BXM / KX-TGA550BXM 20 CPU DATA (BASE UNIT) 20.1. IC501 Description High High_Z Description High High_Z LINE_SZ 62 BMCCLK High NOT_RLY On Hook Off Hook 63 RXEN Active BELL 64 TXEN Active Off Hook On Hook 65 RXGAIN High AC_DOWN _DET...

  • Page 87: Cpu Data (Handset)

    KX-TG5571BXM / KX-TGA550BXM 21 CPU DATA (HANDSET) 21.1. IC201 Description High High_Z Description High High_Z SPOUTP 63 STB_D Active BCLK 64 STB_C Active 65 STB_B Active RSSI 66 STB_A Active 67 GND XOUT 68 VCC 69 TCK 70 TMS 71 TDI...

  • Page 88: Explanation Of Ic Terminals (Rf Part)

    KX-TG5571BXM / KX-TGA550BXM 22 EXPLANATION OF IC TERMINALS (RF PART) 22.1. IC701...

  • Page 89: Ic801

    KX-TG5571BXM / KX-TGA550BXM 22.2. IC801 Backside Terminal: GND...

  • Page 90: Ic851

    KX-TG5571BXM / KX-TGA550BXM 22.3. IC851 Backside Terminal: GND...

  • Page 91: How To Replace The Flat Package Ic

    KX-TG5571BXM / KX-TGA550BXM 23 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 92: Flat Package Ic Installation Procedure

    KX-TG5571BXM / KX-TGA550BXM 23.3. 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 93: Cabinet And Electrical Parts (Base Unit)

    KX-TG5571BXM / KX-TGA550BXM 24 CABINET AND ELECTRICAL PARTS (BASE UNIT)

  • Page 94: Cabinet And Electrical Parts (Handset)

    KX-TG5571BXM / KX-TGA550BXM 25 CABINET AND ELECTRICAL PARTS (HANDSET)

  • Page 95: Cabinet And Electrical Parts (Charger Unit)

    KX-TG5571BXM / KX-TGA550BXM 26 CABINET AND ELECTRICAL PARTS (CHARGER UNIT)

  • Page 96: Accessories And Packing Materials

    KX-TG5571BXM / KX-TGA550BXM 27 ACCESSORIES AND PACKING MATERIALS 27.1. KX-TG5571BXM...

  • Page 97: Kx-Tga550Bxm (Optional Set)

    KX-TG5571BXM / KX-TGA550BXM 27.2. KX-TGA550BXM (Optional Set)

  • Page 98: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TG5571BXM / KX-TGA550BXM 28 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 28.1. Base Unit 28.2. Handset...

  • Page 99: Charger Unit

    KX-TG5571BXM / KX-TGA550BXM 28.3. Charger Unit...

  • Page 100: Replacement Parts List

    KX-TG5571BXM / KX-TGA550BXM 29 REPLACEMENT PARTS Ref. Part No. Part Name & Description Remarks L0AA04A00028 SPEAKER LIST PQHR11082Z GUIDE, SP HOLDER POM-HB PQWE10037Z BATTERY TERMINAL PS-HB Note: PQBC10426Z1 PUSH BUTTON, NAVI ABS-HB PQHR11103Z OPTIC CONDUCTIVE PARTS, LED PS-HB 1. RTL (Retention Time Limited)
  • Page 101 KX-TG5571BXM / KX-TGA550BXM Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks L873 MQLRF2N2DFB COIL R524 ERJ2GEJ561 C723 MQLRF2N7DFB COIL R525 ERJ2GEJ681 C874 MQLRF1N5DFB COIL R533 ERJ2GEJ472X 4.7K (JACKS AND CONNECTOR) R535 ERJ2GEJ102...

  • Page 102: Handset

    KX-TG5571BXM / KX-TGA550BXM Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C501 ECUV1C104KBV C809 ECUE1H102KBQ 0.001 C503 ECUV1C104KBV C811 ECUE1H2R0CCQ C504 ECUV1C104KBV C821 ECUE1H100DCQ C508 ECUE1H2R0CCQ C827 ECJ0EC1H050C C509 ECUE1H2R0CCQ C832 F1G1H221A541...
  • Page 103 KX-TG5571BXM / KX-TGA550BXM Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PQHR11107Z GUIDE, LCD ABS-HB D363 MA132WK DIODE(SI) PQBC10427Z1 PUSH BUTTON, CURSOR ABS-HB LED251 B3ACB0000115 PQBX10378X1 PUSH BUTTON, 12KEY PMMA-HB LED252 B3ACB0000115...

  • Page 104: Charger Unit

    KX-TG5571BXM / KX-TGA550BXM Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R744 ERJ2GEJ102 C716 ECUE1H2R0CCQ R747 ERJ2GEJ102 C722 ECUE1H2R0CCQ R751 ERJ2GEJ102 C725 ECJ0EC1H050C R752 ERJ2GEJ102 C731 ECJ0EB1C103K 0.01 R809 ERJ2GEJ223 C732 ECUE1H102KBQ 0.001...

  • Page 105: Accessories And Packing Materials

    KX-TG5571BXM / KX-TGA550BXM Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks 200-4 PQHR11098Z OPTIC CONDUCTIVE PARTS, LED PS-HB PQKL10068Y2 STAND, WALL MOUNT ABS-HB LENS PQQX14550Z INSTRUCTION BOOK (for 200-5 PQYF10612Z1 CABINET COVER...
  • Page 106 KX-TG5571BXM / KX-TGA550BXM Memo...

  • Page 107: For Schematic Diagram

    KX-TG5571BXM / KX-TGA550BXM 30 FOR SCHEMATIC DIAGRAM 30.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN)) 30.1.1. Acoustic Testing Mode 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 108 KX-TG5571BXM / KX-TGA550BXM 31 SCHEMATIC DIAGRAM (BASE UNIT_MAIN) CON_EN CON_EN V_RF (VPA) V_RF V_RF RADIO_EN RADIO_EN PA_CONT PA_CONT SYN_LE2 SYN_LE2 SYN_OUT SYN_OUT IC609 SYN_DATA SYN_DATA SYN_CLK SYN_CLK R523 39K C521 C3P SYN_LE1 SYN_LE1 R521 1.8K TX_DATA Q521 TX_DATA RX_GAIN RX_GAIN...

  • Page 109: Schematic Diagram (Base Unit_Main)

    KX-TG5571BXM / KX-TGA550BXM 4.0V 4.0V CONVERTOR IC331 Q300 VCC 3.3V VOUT REFERENCE L300 1XX : TEL LINE VDET 22uH 3XX : POWER, CHARGE, RESET 4XX : RESET,MIC, SP R365 R361 3.3K D362 5XX : DSP,RF I/F R364 10K 6XX : FLASH, KEY, LCD Q361 REG_3.3V...
  • Page 110 KX-TG5571BXM / KX-TGA550BXM 32 SCHEMATIC DIAGRAM (BASE UNIT_RF PART) R856 10K R809 22K 4.0V TX-Amp. ANT-SW. 5.8GHz RF C852 K0.01 C851 J100P C891 R808 C854 K1000P 7 SW1 VCC1 8 SW2 5.8GHz RF GN D 9 ANT1 IC851 GN D...
  • Page 111 KX-TG5571BXM / KX-TGA550BXM SHIELD L860 V_RF (VPA) PA_CONT CON_EN RF-Reg. IF-Reg. 4.0V IC841 IC761 C846 C766 RADIO_EN L768 Vcc_TX V_RF VOUT VOUT 3.0V Reg 2.5V_REG SYN_LE2 2.4GHz IF SYN_OUT 2.5V SYN_DATA C751 D10P SYN_LE1 C752 K470P SYN_CLK C707 K1000P C714...
  • Page 112 KX-TG5571BXM / KX-TGA550BXM 33 SCHEMATIC DIAGRAM (BASE UNIT_OPERATION) SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 COM2 COM1 2APVCC MSG_LED MSG/VM LED904 MSG_LED ANS_LED LED907 ANS_LED INUSE_LED LED902 INUSE GREEN INUSE_LED CHG_LED CHARGE LED901 CHG_LED INT_LED 2APVCC INTERCOM...
  • Page 113 KX-TG5571BXM / KX-TGA550BXM Memo...

  • Page 114: Schematic Diagram (Handset_Main)

    KX-TG5571BXM / KX-TGA550BXM 34 SCHEMATIC DIAGRAM (HANDSET_MAIN) to RF PART OSC_IN RSSI R340 C340 K0.1 TX_DATA PA_CONT RX_EN TX_EN RX_GAIN RX_DATA CON_EN IC246 FLASH_4M SYN_LE2 (10) (11) (12) RADIO_EN BCLK SHCTRL (13) (14) RF_RESET SYN_DATA (15) SYN_LE1 (16) SYN_CLK RESET...
  • Page 115 KX-TG5571BXM / KX-TGA550BXM TEST SIGNAL FREQUENCY:1KHz Headset TX -39dBm/600 38mVp-p CN331 HEADSET_JACK R331 L331 L332 Q331 MIC1 MIC2 R225 L334 X201 Headset RX 13.824MHz 170mVp-p/150 HEADSET-DET (Vol.MAX) R201 NC HANDSET SP (10) R323 (11) (12) (13) (14) R324 C208 10uF...
  • Page 116 KX-TG5571BXM / KX-TGA550BXM 35 SCHEMATIC DIAGRAM (HANDSET_RF PART) R856 4.7K R809 3.3V TX-Amp. ANT-SW C852 K0.01 C851 J100P C891 B0.2P R808 C854 K1000P VCC1 5.8GHz RF ANT1 10 GND IC851 VCC0 FL811 11 GND 12 ANT2 PAIN 5.8GHz TX C896 5.8GHz-RF...

  • Page 117: Schematic Diagram (Handset_Rf Part)

    KX-TG5571BXM / KX-TGA550BXM SHIELD L860 PA_CONT CON_EN RF-Reg. 3.6~4.2V IF-Reg. IC761 IC841 C846 C766 RADIO_EN L768 Vcc_TX V_RF VOUT VOUT 3.0V Reg 2.5V_REG SYN_LE2 2.4GHz IF SYN_OUT SYN_DATA 2.5V C751 D10P SYN_LE1 C752 K470P SYN_CLK C707 K1000P C714 K1000P C708 C1.5P...
  • Page 118 KX-TG5571BXM / KX-TGA550BXM...
  • Page 119 KX-TG5571BXM / KX-TGA550BXM CN661 L102 Q156 L101 Q161 P101 C166 Q142 Q141 C161 CN301...
  • Page 120 KX-TG5571BXM / KX-TGA550BXM...
  • Page 121 KX-TG5571BXM / KX-TGA550BXM...
  • Page 122 KX-TG5571BXM / KX-TGA550BXM...
  • Page 123 KX-TG5571BXM / KX-TGA550BXM...
  • Page 124 KX-TG5571BXM / KX-TGA550BXM...
  • Page 125 KX-TG5571BXM / KX-TGA550BXM LED261 PQUP 11292Z Q871 IC841 IC761 R286 C286 C279 C284 C283 C278 C277 C275 C274 Q331 RECEIVER IC261 Q231 RA255 Q262 Q261 RA201 Q221 Q251 RA251 Q243 Q362 Q361 Q363 CHG2 CHG1...
  • Page 126 KX-TG5571BXM / KX-TGA550BXM CN271 C271 C276 C272 C273 RIGHT LEFT TALK S251 MUTE HOLD FLASH...
  • Page 127 KX-TG5571BXM / KX-TGA550BXM...

  • Page 128: Circuit Board (Base Unit_Main)

    KX-TG5571BXM / KX-TGA550BXM 42 CIRCUIT BOARD (CHARGER UNIT) 42.1. Component View PQJT01 PQHG PQHG01 PQHG02 PQHG PQJT02 PQUP11327Z CIRCUIT BOARD (Charger (Component View)) 42.2. Flow Solder Side View PQUP11327Z CIRCUIT BOARD (Charger (Flow Solder Side View)) I.N./N KXTG5571BXM KXTGA550BXM...

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