5.8 ghz digital cordless phone/5.8 ghz expandable digital cordless phone with two handsets/5.8 ghz digital cordless phone with three handsets (72 pages)
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.
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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.
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).
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.
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.
KX-TG5621BXS / KX-TGA561BXS 4.4. Settings 4.4.1. Connecting the AC adaptor and telephone line cord...
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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.
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KX-TG5621BXS / KX-TGA561BXS 4.4.2.2. Programming using the Direct Commands...
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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.
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...
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.
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)
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.
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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.
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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.
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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).
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KX-TG5621BXS / KX-TGA561BXS 7.4.5. RF-DSP Interface Signal Wave Form <Test Burst Mode>...
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).
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”...
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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.
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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.
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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...
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.
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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.
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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.
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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.
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.
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.
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.
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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.
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.
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.
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...
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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.
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.
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 →...
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.
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.
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.
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...
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...
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.
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.
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...
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 →...
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).
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.
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.
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.
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.
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.
KX-TG5621BXS / KX-TGA561BXS 27 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 27.1. Base Unit 27.2. Handset...
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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.
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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...
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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...
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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...
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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).
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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.