Panasonic KX-TG3521BXB Service Manual Download Page 26

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KX-TG3521BXB/KX-TG3521BXS/KX-TG3522BXB/KX-TG3522BXS/KX-TGA351BXB/KX-TGA351BXS

4.9.

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.

Summary of Contents for KX-TG3521BXB

Page 1: ...ing and distribu tion is a violation of law ORDER NO KM40611250CE Telephone Equipment KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 2 4 GHz Expandable Digital Cordless Phone Black Version Silver Version for Asia Middle Near East and Other areas ...

Page 2: ...2 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS ...

Page 3: ...shooting Guide 55 10 1 Troubleshooting Flowchart 55 10 2 How to Replace the Flat Package IC 66 10 3 How to Replace the LLP Leadless Leadframe Package IC 68 11 Disassembly and Assembly Instructions 70 11 1 Disassembly Instructions 70 11 2 How to Replace the Handset LCD 73 11 3 Antenna soldering work 74 12 Measurements and Adjustments 75 12 1 Things to Do after Replacing IC or X tal 75 12 2 Base Uni...

Page 4: ... elements will refer to standard solder or solder that con tains 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 This model and others like it manufactured using lead free solder will have PbF stamped on the PCB For service and repair work we suggest using the same type of solder Caution PbF solder...

Page 5: ...ufactured using Tin Silver and Copper Sn Ag Cu you can also use Tin and Copper Sn Cu or Tin Zinc and Bismuth Sn Zn Bi Please check the manufac turer s specific instructions for the melting points of their products and any precautions for using their product with other materi als The following lead free PbF solder wire sizes are recommended for service of this product 0 3 mm 0 6 mm and 1 0 mm ...

Page 6: ...6 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 3 Specifications ...

Page 7: ...ting and receiving frequencies of the base unit and handset are shared in the same frequency The construction of RX TX frequency data is shown below It consists of 4 slots from the base unit to the handset and 4 slots from the handset to the base unit total 8 slots in 10 ms By this slot system simultaneous air link and communication between 4 handsets and the base unit can be realized One communic...

Page 8: ...f 10 ms and has four duplex paths so it is possible to perform four duplex communications simultaneously In 1 slot 1 25 ms the 10 ms of voice data is transmitted Each slot makes every frame frequency hop 100 hops sec Although each slot UpLink3 and UpLink4 uses different frequency UpLink3 and DownLink3 use the same frequency 2 Handsets Link Traffic Bearer A link is established between base unit and...

Page 9: ...rnal filter is demodulated into RX DATA then enters DSP IC501 The DSP performs TDD TDMA and ADPCM decoding to convert the RX DATA into the voice signal then it is output to the speaker Transmission The voice signal entering from the microphone is led to DSP IC501 The DSP encodes ADPCM and TDD TDMA with FHSS to TX DATA The TX DATA signal enters IC101 of RF UNIT and is modulated to 2 4 GHz The RF si...

Page 10: ...10 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 4 2 Explanation of Link Data Communication 4 2 1 Calling 4 2 2 To Terminate Communication 4 2 3 Ringing ...

Page 11: ...D_IN CID_IN IC501 DSP 4 0 V CONVERTOR MIN INUSE DETECT 2 INUSE DETECT 1 RECEIVE AMP DCIN 1 DCIN 2 IC331 RESET POWER_DOWN VCCIN VCC VCCA VCCPA INT_1 V_RF INT_1 4 VCC IC611 EEPROM IC300 Q300 R151 R152 R131 R133 Q171 RSSI ANT1 SHCTRL RADIO_EN TX_EN RX_EN BCLK SYN_DATA SYN_CLK OSC_IN SYN_EN TXDATA V_RF VPA SI SO CS IN USE_LED KEY 1 KEY A RXDATA MIP SYN_OUT RX_GAIN RF_RESET 3 3 V REGULATOR with RESET C...

Page 12: ... Part ANTENNA IC701 XIN TXEN TC_CTRL RSTN RXEN Frac N PLL 2 MHz FM det Slicer Serial Interface VCC 2 4 GHz Mod Demod Circuit 2 4 GHz 2 4 GHz MOD_EN SCLK SDIO SLE OSC_IN TX_EN SDATA TX_DATA RX_DATA RSSI SHCTRL RF_RESET RX_EN RX_GAIN DSP VPA VRF FL701 D703 D704 RXGAIN KX TG3521 3522 BLOCK DIAGRAM Base Unit_RF Part ...

Page 13: ...etection is implemented by the DSP system in software The DTMF detection is performed during Line Monitoring modes of operation When the DTMF data from the Handset is received the DTMF signal is output Caller ID demodulation The DSP implements monitor and demodulate the FSK signals that provide CID information from the Central Office Digital Switching The voice signal from telephone line is transm...

Page 14: ... KX TG3522BXS KX TGA351BXB KX TGA351BXS 4 5 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 0 V DCDC Converter IC331 3 3 V Regulator ...

Page 15: ...X TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 4 5 3 1 Charge Circuit The voltage from the AC adaptor is supplied to the charge circuits The charge is controlled by the handset ...

Page 16: ...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 The set starts to operate when VCC goes up to 3 0 V or more in the circuit voltage diagram Note 1 The initializing time of the DSP chip is 28 ms under normal conditions ...

Page 17: ...ows T L101 R111 C111 Q111 DSP pin 58 BELL When the CPU DSP detects a ring signal Q141 turns on thus providing an off hook condition active DC current flow through the circuit Following signal flow is the DC current flow T L101 D101 Q141 Q161 R163 D101 L102 P101 R ON HOOK Circuit Q141 is open Q141 is connected as to cut the DC loop current and to cut the voice signal The unit is consequently in an ...

Page 18: ...hether the telephone con nected in parallel is on hook or off hook by detecting changes in the T R voltage Circuit Operation Parallel connection detection when on hook When on hook the voltage is monitored at pin 86 of IC501 There is no parallel connection if the voltage is 1 65 V or higher while a parallel connection is deemed to exist if the voltage is lower Parallel connection detection when of...

Page 19: ...o the telephone using either method of FSK or DTMF The method is chosen according to the exchange of telephone office This unit is available to receive the data with both methods and displays the received data on LCD FSK Frequency Shift Keying format DTMF format It is the method to send the telephone number of calling party with DTMF to the telephone DTMF is sent before the first bell sig nal The ...

Page 20: ..._EN SYN_LE2 SYN_OUT SYN_DATA SYN_CLK SYN_LE1 RX_GAIN RX_EN TX_EN SHCTRL RF_RESET RSSI WP CLK DATA KEYSTOROBE_A F KEYIN_1 5 Q531 CHARGE DETECT CHARGE Q361 D361 Q521 Q555 Q551 Q362 Q363 CHARGE CONTROL RESET POWER DOWN REGULATOR MIC SP Headset Jack CN431 Q431 LED555 LED556 LCD LED561 ANT LED551 554 KEY HEADSET DETECT Monitor SP 3 3 V REGULATOR IC382 2 5 V REGULATOR LCD KEYS RF part ANT X501 13 824 MH...

Page 21: ...RF Part ANTENNA IC701 XIN TXEN TC_CTRL RSTN RXEN Frac N PLL 2 MHz FM det Slicer Serial Interface VCC 2 4 GHz Mod Demod Circuit 2 4 GHz 2 4 GHz MOD_EN SCLK SDIO SLE OSC_IN TX_EN SDATA TX_DATA RX_DATA RSSI SHCTRL RF_RESET RX_EN RX_GAIN DSP VRF VPA FL701 D703 D704 RXGAIN KX TGA351 BLOCK DIAGRAM Handset_RF Part ...

Page 22: ... 1 1 DSP IC501 Function Battery Low Power down detect circuit Ringer Generation Interface circuit RF part Speaker Mic LED Key scan LCD Headset Initial waves Note 1 The initializing time of the DSP chip is 20 ms under normal conditions 4 8 1 2 RF part Mainly voice signal is modulated to RF or it goes the other way 4 8 1 3 EEPROM IC541 All setting data is stored ex ID code user setting Phonebook Cal...

Page 23: ...23 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 4 8 2 Power Supply Circuit Voltage is supplied separately to each block ...

Page 24: ...the battery via D361 and R366 or Q361 The voltage between CHARGE and CHARGE flows R531 Q531 pin 38 of IC501 where the charge is detected Then IC501 calculates the battery consumption amount from the previous charge and it controls Q361 Q362 Q363 by pin 80 of IC501 until charging is complete When charging is complete the control pattern is switched to Trickle charging form from Operational charging...

Page 25: ...hone signal from the headset is input to DSP 95 Also the power for the microphone is supplied from DSP 92 and the power is turned OFF on standby 4 8 6 Reception Signal The voice signal from the base unit is output to DSP 98 This signal is led to the headset jack CN431 The signal through the headset jack and the other signal output from DSP 97 drives the speaker When the headset is inserted to the ...

Page 26: ...KX TGA351BXS 4 9 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 27: ...na 2 4 GHz RX signal from the Antenna is filtered by BPF FL701 and supplied to pin 4 of IC701 then demodulated signal RX_DATA comes out from pin 16 At the same time RSSI Received Signal Strength Indicator outputs from pin 14 Reference clock 13 824 MHz from DSP block is supplied to pin 11 of IC701 V_PA and V_RF supply 2 5 V regulated voltage Note The exposed GND_PLATE on the bottom of the IC701 sup...

Page 28: ...gnal from the Antenna is filtered by BPF FL701 and supplied to pin 4 of IC701 then demodulated signal RX_DATA comes out from pin 16 At the same time RSSI Received Signal Strength Indicator outputs from pin 14 Reference clock 13 824 MHz from DSP block is supplied to pin 11 of IC701 V_RF supplies 2 5 V regulated voltage V_PA supplies 3 3 V reg ulated voltage Note The exposed GND_PLATE on the bottom ...

Page 29: ...he AC adaptor is supplied to the charge circuits Main charge 180 250 mA at the Battery of maximum 7 hours is started soon after the handset is placed on the charger unit Then it changes to Trickle charge to prevent from over charging The route for this is as follows DC pin of CN1 R1 R5 R7 R13 CHARGE pad Handset CHARGE pad DC pin of CN1 ...

Page 30: ...30 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 4 11 Signal Route RF part signal route ...

Page 31: ...31 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 5 Location of Controls and Components 5 1 Controls 5 1 1 Base Unit 5 1 2 Handset 5 2 Display ...

Page 32: ... TG3522BXS KX TGA351BXB KX TGA351BXS 6 Installation Instructions 6 1 Setting Up the Base Unit 6 1 1 Connecting the AC Adaptor and Telephone Line Cord 6 2 Setting Up the Handset 6 2 1 Connecting the AC Adaptor 6 3 Battery Installation Replacement ...

Page 33: ...33 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 6 4 Battery Charge 6 4 1 Battery Level 6 4 2 Panasonic Battery Performance ...

Page 34: ...ble 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 using the direct commands Mainly the direct command method is used in this service manual 7 1 1 Programming by Scrolling through the Display Menus ...

Page 35: ...35 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 7 1 2 Programming using the Direct Commands ...

Page 36: ...X TGA351BXS 7 2 Copying Handset Phonebook Items You can copy one or all of the phonebook items from one handset to another 7 2 1 Copying All Items 7 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 37: ...37 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 7 4 Error Messages ...

Page 38: ...38 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 7 5 Troubleshooting ...

Page 39: ...39 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS ...

Page 40: ...A351BXS 8 Test Mode 8 1 Adjustment and Test Mode Flow Chart 8 1 1 Test Burst Mode for Base Unit Note 1 When you check test mode connect to the external Buttons because base unit has only LOCATOR key Refer to Flow Sol der Side View P 77 2 Refer to Check Table for RF part P 61 ...

Page 41: ...TG3522BXS KX TGA351BXB KX TGA351BXS 8 1 2 TX CW Mode for Base Unit Note 1 When you check test mode connect to the external Buttons because base unit has only LOCATOR key Refer to Flow Sol der Side View P 77 2 Refer to Check Table for RF part P 61 ...

Page 42: ...3522BXS KX TGA351BXB KX TGA351BXS 8 1 3 RX CW Test Mode for Base Unit Note 1 When you check test mode connect to the external Buttons because base unit has only LOCATOR key Refer to Flow Sol der Side View P 77 2 Refer to Check Table for RF part P 61 ...

Page 43: ...te 1 When you check test mode connect to the external Buttons because base unit has only LOCATOR key Refer to Flow Sol der Side View P 77 2 Refer to Test Link Mode for Handset P 48 If you can not proceed to the next step refer to Registering a Handset P 58 3 Refer to Check Table for RF part P 61 4 for factory use only ...

Page 44: ...X TGA351BXS 8 1 5 Adjustment Mode for Base Unit Cross Reference Check and Adjust Frequency Base Unit P 75 Note 1 Refer to the table below if using Frequency Counter for checking BCK TEST MODE Frequency 1 Channel 13 824 MHz 2400 724512 MHz 30 Hz 5 20 kHz 100 Hz 17 36 kHz ...

Page 45: ...521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 8 1 6 Test Burst Mode for Handset Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 61 ...

Page 46: ...G3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 8 1 7 TX CW Mode for Handset Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 61 ...

Page 47: ...521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 8 1 8 RX CW Test Mode for Handset Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 61 ...

Page 48: ...GA351BXB KX TGA351BXS 8 1 9 Test Link Mode for Handset Note 1 LCD displays the Channel number exception default CH00 1ch 2 If you can not proceed to the next step refer to Registering a Handset P 58 3 for factory use only 4 Refer to Check Table for RF part P 61 ...

Page 49: ...ss Reference 1 Adjust Battery Low Detector Voltage Handset P 75 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 Frequency Counter for checking BCK TEST MODE Frequency 1 Channel 13 824 MHz 2400 724512 MHz 30 Hz 5 20 kHz 100 Hz 17 36 kHz ...

Page 50: ...s operation Erase stored Phone numbers Caller list and etc This operation should not be performed for a usual repair 9 1 1 Handset 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 battery When deregistering all handset by the base unit refer to Deregistering All Handsets by the Base Unit P 59 ...

Page 51: ...TGA351BXB KX TGA351BXS 9 2 Copying Phonebook Items when Repairing You can copy the handset phonebook to another compatible Panasonic handset This will help to save the original phonebook data which the customer has registered Refer to the following procedures ...

Page 52: ... max number of handsets are already registered to the base unit a new handset cannot be registered To register the handset refer to Registering a Handset P 58 To cancel the handset refer to Deregistering a Handset P 58 To copy the handset phonebook refer to Copying Handset Phonebook Items P 36 ...

Page 53: ...te base unit They need to be cleared as follows 9 3 1 For Models with Only 1 Handset Included Replace the P C board a by the normal P C board b Erase the registration information of P C board b Refer to Deregistering All Handsets by the Base Unit P 59 Register the handset A 1 to the base unit A Refer to Registering a Handset P 58 Reset the setting information existed in P C board b Press and keys ...

Page 54: ... a Handset P 58 Reset the setting information existed in P C board b Press and keys of the handset A 1 simultaneously until a confirmation tone is heard Erase the registration information of P C board b Refer to Deregistering All Handsets by the Base Unit P 59 Register each handset A 1 A 2 to the base unit A Refer to Registering a Handset P 58 Note 1 Make sure the service part no written in the se...

Page 55: ... TGA351BXB KX TGA351BXS 10 Troubleshooting Guide 10 1 Troubleshooting Flowchart Cross Reference Check Power P 56 Check Battery Charge P 56 Check Link P 57 Check the RF part P 58 Check Handset Transmission P 65 Check Handset Reception P 65 Check Caller ID P 65 ...

Page 56: ...eference Power Supply Circuit P 14 Reset Circuit P 16 Note DSP is IC501 1 Refer to Specifications P 6 for part number and sup ply voltage of AC adaptor 2 Refer to Circuit Board Base Unit_Main P 91 10 1 2 Check Battery Charge Note 1 Refer to Specifications P 6 for part number and sup ply voltage of AC adaptor ...

Page 57: ...57 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 10 1 3 Check Link Note DSP is IC501 1 Refer to Finding out the Defective part P 58 Cross Reference Check the RF part P 58 ...

Page 58: ... 4 Check the RF part 10 1 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 10 1 4 1 1 Registering a Handset 10 1 4 1 2 Deregistering a Handset ...

Page 59: ...59 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 10 1 4 1 3 Deregistering All Handsets by the Base Unit ...

Page 60: ...XB KX TG3522BXS KX TGA351BXB KX TGA351BXS 10 1 4 2 RF Check Flowchart Each item 1 6 of RF Check Flowchart corresponds to Check Table for RF part P 61 Please refer to the each item Note 1 Refer to Things to Do after Replacing IC or X tal P 75 ...

Page 61: ... HS BU Mode RX CW Mode 4 HS BU to be checked Mode Test Burst Mode 1 1 Place the Regular HS about 15 cm away from the BU 2 Confirm that RSSI of the Regular HS is approximately 2 V by Oscilloscope 5 1 Place the HS about 15 cm away from the Regular BU 2 Confirm that RSSI of the Regular BU is approximately 2 V by Oscilloscope 6 5 RX Sensitivity confirmation Regular HS BU Mode Test Burst Mode 1 HS BU t...

Page 62: ...ut 20 m between HS and BU Link OK TX Power of the HS is OK No Link TX Power of the HS is NG Range Confirmation RX TEST RX sensitivity check HS BU Mode Test Link Mode 1 1 Register Regular HS to BU to be checked 2 Set BU to Test Link mode 3 Set Regular HS to Test Link mode Set TX Power and RX Sensitivity of the BU and Regular HS by CHART1 At distance of about 20 m between HS and BU Link OK RX Sensit...

Page 63: ...63 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 10 1 4 5 RF DSP Interface Signal Wave Form Test Burst Mode ...

Page 64: ...64 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS Test Burst Mode ...

Page 65: ...te P 30 Note When checking the RF part Refer to Check the RF part P 58 10 1 7 Check Caller ID Cross Reference Telephone Line Interface P 17 Calling Line Identification Caller ID P 19 Note Make sure the format of the Caller ID or Call Waiting Caller ID services of the Telephone company that the customer subscribes to It is also recommended to confirm that the customer is really a subscriber of the ...

Page 66: ...n cleaning type Note See About Lead Free Solder PbF Pb free P 4 10 2 2 How to Remove the IC 1 Put plenty of solder on the IC pins so that the pins can be completely covered Note If the IC pins are not soldered enough you may give pressure to the P C board when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and its pins first and then cut off the pins thoroughly 3 Wh...

Page 67: ...pins Check the accuracy of the IC setting with the corresponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 10 2 4 How to Remove a Solder Bridge 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below ...

Page 68: ... Caution To replace the IC efficiently choose the right sized nozzle of the hot air desoldering tool that matches the IC package Be careful about the temperature of the hot air desoldering tool not to damage the PCB and or IC 10 3 3 How to Remove the IC 1 Heat the IC with a hot air desoldering tool through the P C board 2 Pick up the IC with tweezers etc when the solder is melted completely Note B...

Page 69: ... IC Note When placing the IC the positioning should be done very carefully 3 Heat the IC with a hot air desoldering tool through the P C board until the solder on IC bottom is melted Note Be sure to place it precisely controlling the air volume of the hot air desoldering tool 4 After soldering confirm there are no short and open circuits with visual inspection 10 3 5 How to Remove a Solder Bridge ...

Page 70: ...70 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 11 Disassembly and Assembly Instructions 11 1 Disassembly Instructions 11 1 1 Base Unit ...

Page 71: ...71 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 11 1 2 Handset ...

Page 72: ...72 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 11 1 3 Charger Unit ...

Page 73: ...73 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 11 2 How to Replace the Handset LCD ...

Page 74: ...B KX TG3522BXS KX TGA351BXB KX TGA351BXS 11 3 Antenna soldering work 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 Solder the antenna P C board as below ...

Page 75: ...to Adjust Crystal mode Clock Adj is displayed on LCD Check BCK frequency 4 If the BCK frequency is out of the checking tolerance 100 Hz adjust to Adjustment tolelance 30 Hz by pressing or key Adjustment Tolerance 13 824 MHz 30 Hz 5 Press TALK key to write the new frequency factor in EEPROM 6 Turn the power off Then this value is available Cross Reference Adjustment Mode for Handset P 49 12 1 4 Adj...

Page 76: ...740 R719 R709 R371 R115 R372 SA101 SA102 SA103 P101 R341 R340 R342 R343 R303 R304 R113 R133 R114 R423 R421 R422 R533 R165 R178 R663 R662 R660 SW661 R171 R167 R166 R172 R175 R176 R661 R509 R453 R460 R454 R459 R517 R604 R603 R605 R602 R591 R592 R594 R593 R132 R131 R153 R152 R134 R154 R380 R111 R112 R122 R151 R308 R121 L705 L711 L709 L361 L501 L300 L371 L472 L473 WBH201 WBH202 L101 L102 IC701 D361 D3...

Page 77: ...57 R156 R185 C185 R164 R162 R169 R168 C168 R160 R161 D143 D142 CHG R163 R183 R677 C141 C691 C184 C677 C675 C673 C611 C612 FCS FSI FRST FCLK FSO R612 R611 R675 R673 C163 C164 C162 C160 C142 C101 Q143 D101 E E E E E IC612 IC611 RXI RXE TXE BCLK Q141 Q161 Q142 Q156 KEY2 KEY3 TE KEY1 KEYB MIC1 MIN2 MIP2 URX UTX 1 1 4 8 3 5 4 5 PQUP11457Z A PbF TEST SW Button 2 Button 1 Button 3 ...

Page 78: ...L705 IC382 TP_TESTN RA401 MIC A RA403 RA551 1 5 2 4 3 D704 C531 C522 C521 C379 C361 C351 C354 C353 C377 C412 C411 C413 C541 C542 C509 C543 C544 C352 C523 Q521 C524 C505 C506 C433 C439 C417 C594 C503 C414 C415 C416 C526 C508 C525 C514 C515 TXO TE RST SPP SPM C512 C501 C596 C502 C507 C519 C546 C504 CN431 C386 C381 C432 C436 C422 C434 C435 C437 C421 C572 C573 CA574 CA571 C511 C765 C766 C746 C744 C792...

Page 79: ... 2435 509424 41 2436 589160 2436 399316 42 2437 483008 2437 293164 43 2438 372900 2438 183057 44 2439 266748 2439 076904 45 2440 156641 2439 966797 46 2441 050488 2440 860645 47 2441 940381 2441 750537 48 2442 834229 2442 644385 49 2443 724121 2443 534277 50 2444 617969 2444 428125 51 2445 507861 2445 318018 52 2446 401709 2446 211865 53 2447 291602 2447 101758 54 2448 185449 2447 995605 55 2449 0...

Page 80: ...80 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS Memo ...

Page 81: ... at any time with the development of new technology 13 1 2 Handset Schematic Diagram Handset_Main Notes 1 DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams may be modified at any time with the development of new technology 13 1 3 Charger Unit Schematic Diagram Charger Unit Notes 1 DC voltage measurements are taken with voltmeter from the nega...

Page 82: ... 72 CHARGE_CTL 79 UCFG1 80 UCFG2 81 UART_TX 82 UART_RX 83 MSG_LED 84 GND 85 PDN 86 DCIN1 87 VREF 88 MIP 89 MIN 90 91 NC 92 GNDA 93 CID_IN 94 CID_IN 95 VCCA 96 LIN0 97 LOUT0 1 GNDPA 2 SPP 3 BCLK 23 RADIO_EN 24 SH_CTRL 25 ANT0 26 GND 27 VCC 28 SYN_EN 48 INT0 49 FLASH_SCK 50 NC 51 NC 52 KEYS_D 53 KEYS_C 73 CHARGE_DET 74 NC 75 INUSE_LED 76 ANS_LED 77 INT1 78 BANK2 98 NC HSOUT 99 VCCPA 100 SPN 100n C53...

Page 83: ...61 22V A K 1u C342 CN301 2 1 1 NC1 2 RESET 3 VDET 4 VIN 5 VOUT 6 NC2 7 GND 8 CD CN101 TEL JACK 1 2 22 R171 K0 47 C331 4 7k R142 3216 NC R169 NC C168 SA103 SA102 NC SA101 NC 2 1 35 47u C300 Q141 B C E Q142 B C E Q156 NC B C E Q161 B C E 25 100u C306 Q111 B C E Q171 B C E NC R341 NC R343 NC R342 Q340 NC 1 3 2 NC R340 D142 A K 6 3 330u C341 47 R371 47 R372 NC R115 NC C115 D10p C164 NC C160 NC R166 P1...

Page 84: ...OUT SH_CTRL RF_RSTN BCLK RX_GAIN GND L701 18nH C742 4 7uF 2125 SHIELD NC C766 IC701 2 4G_RF 1 TX 2 GND_ISO1 9 VCC_IF 3 GND_ISO2 4 RX 5 VCC_RF 6 VCC_IF2 7 TESTP 8 TESTN 10 XOUT 11 XIN 12 VCC_BIAS 13 REXT 14 RSSI 15 RSTN 16 RXDATA 17 TC_CTRL 18 VCC_DIG 19 VCC_PLL1A 20 VCC_PLL1B 21 TXEN 22 RXEN 23 VCC_PLL2B 24 VCC_PLL2A 25 RXGAIN 26 PA_RAMP 27 TXMOD 28 SYN_CLK 29 SYN_EN 30 SYN_DATA 31 SYN_OUT 32 VCC_...

Page 85: ...85 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS Memo ...

Page 86: ... 9 GND 10 GND 11 GND 12 GND 13 RST 14 FL_RST 15 FL_DO 16 FL_DI 17 FL_CS 18 BL_LED 19 SYN_OUT 20 TX_DATA 21 PA_CONT 22 SYN_LE2 29 VCC 30 SYN_LE1 31 SYN_CLK 32 SYN_DATA 33 RX_EN 34 TX_EN 35 RX_GAIN 36 RX_DATA 37 NC 38 CHG_DET 39 NC 40 NC 41 NC 42 NC 43 NC 44 DB4 45 DB5 46 DB6 47 DB7 54 NC 55 CI 56 LCD_RS 57 RW_WR 58 E_RD 59 LCDPOW 60 ANT_L1 61 ANT_L2 62 ANT_L3 63 STB_E 64 STB_D 65 STB_C 66 STB_B 67 ...

Page 87: ... 1 5M R376 1 5M R378 D531 NC A K K0 1 C379 K0 1 C377 K6800P C433 D361 1 2 560 R362 NC R435 C417 10uF 6 3V C435 10uF 6 3V Q361 1 3 2 Q531 B C E Q363 B C E Q431 B C E Q362 B C E Q521 B C E Q543 B C E D426 2 1 D427 2 1 D423 2 1 D424 2 1 6800P C414 6800P C415 5600P C416 1k RA401 1 2 3 4 2 2k RA402 1 2 3 4 68 RA403 1 2 3 4 MIC 1 2 NC R432 D412 2 1 D413 2 1 NC C412 NC C413 D10P C427 D10P C437 D10P C438 ...

Page 88: ... SYN_OUT SHCTRL RF_RSTN BCLK RX_GAIN GND L701 18nH C742 4 7uF 2125 SHIELD NC C766 IC701 2 4G_RF 1 TX 2 GND_ISO1 9 VCC_IF 3 GND_ISO2 4 RX 5 VCC_RF 6 VCC_IF2 7 TESTP 8 TESTN 10 XOUT 11 XIN 12 VCC_BIAS 13 REXT 14 RSSI 15 RSTN 16 RXDATA 17 TC_CTRL 18 VCC_DIG 19 VCC_PLL1A 20 VCC_PLL1B 21 TXEN 22 RXEN 23 VCC_PLL2B 24 VCC_PLL2A 25 RXGAIN 26 PA_RAMP 27 TXMOD 28 SYN_CLK 29 SYN_EN 30 SYN_DATA 31 SYN_OUT 32 ...

Page 89: ...B KX TG3522BXS KX TGA351BXB KX TGA351BXS 13 6 Schematic Diagram Charger Unit G CP CM DCP DCM CN1 2 1 270 R1 270 R2 270 R3 270 R4 270 R5 NC R6 270 R7 270 R8 270 R9 270 R10 270 R11 270 R12 270 R13 SCHEMATIC DIAGRAM Charger Unit NC No Components ...

Page 90: ...90 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS Memo ...

Page 91: ...41 R340 R342 R343 R303 R304 R113 R133 R114 R423 R421 R422 R533 R165 R178 R663 R662 R660 SW661 R171 R167 R166 R172 R175 R176 R661 R509 R453 R460 R454 R459 R517 R604 R603 R605 R602 R591 R592 R594 R593 R132 R131 R153 R152 R134 R154 R380 R111 R112 R122 R151 R308 R121 L705 L711 L709 L361 L501 L300 L371 L472 L473 WBH201 WBH202 L101 L102 IC701 D361 D300 D133 D153 D473 D472 C780 C711 C706 C704 C710 D703 C...

Page 92: ...5 R164 R162 R169 R168 C168 R160 R161 D143 D142 CHG R163 R183 R677 C141 C691 C184 C677 C675 C673 C611 C612 FCS FSI FRST FCLK FSO R612 R611 R675 R673 C163 C164 C162 C160 C142 C101 Q143 D101 E E E E E IC612 IC611 RXI RXE TXE BCLK Q141 Q161 Q142 Q156 KEY2 KEY3 TE KEY1 KEYB MIC1 MIN2 MIP2 URX UTX 1 1 4 8 3 5 4 5 PQUP11457Z A PbF KX TG3521 3522 CIRCUIT BOARD Base Unit_Main Flow Solder Side View ...

Page 93: ...61 C756 C737 C784 C783 C791 C790 C752 C722 C796 C798 C718 C738 D704 C739 C740 C742 C797 TP_TESTN R732 R733 R742 R741 R730 R791 RA701 R743 R731 R740 R719 R709 L705 L711 L709 IC701 C780 C711 C706 C704 C710 D703 C743 C741 C744 C792 C746 C765 C766 C717 C760 R706 FL701 L704 L713 L702 L706 L701 L703 L790 KX TG3521 3522 CIRCUIT BOARD Base Unit_RF Part Component View ...

Page 94: ... KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 14 3 Circuit Board Base Unit_Antenna KX TG3021 22 31 32 A A P Q U P 1 1 4 6 6 Z P b F KX TG3521 3522 CIRCUIT BOARD Base Unit_Antenna KX TG3021 22 31 32 P Q U P 1 1 4 6 6 Z P b F ...

Page 95: ...01 C596 C502 C507 C519 C546 C504 CN431 C386 C381 C432 C436 C422 C434 C435 C437 C421 C572 C573 CA574 CA571 C511 C765 C766 C746 C744 C792 C741 C743 C780 C717 C760 C711 C706 C710 C704 R531 Q531 R534 R532 R362 R361 R363 R354 R379 R370 MICP MICM R377 R376 BATTP BATTM CHG2 CHG1 R543 R542 R541 R505 R506 R507 R509 R378 R366 R528 R522 R523 R433 C438 R508 R434 R417 PDN VSS1 RX VSS2 VBAT1 TX TDO TDI TMS TCK ...

Page 96: ...older Side View KX TGA351 CIRCUIT BOARD Handset Flow Solder Side View LCD TAPE PbF KX TGA30 R PQUP11462Z SYN_OUT SYN_CLK SYN_EN SYN_DATA LED557 LEFT TALK OFF SP 1 2 3 4 5 6 7 8 9 FLASH HOLD A MIC 0 PAUSE UP DOWN BACK NEXT MENU RIGHT LED555 LED558 LED554 LED552 LED553 LED551 LED556 LED559 LED561 ...

Page 97: ... Component View C783 C784 C791 C790 C718 C738 C798 C796 C722 C752 C737 C795 C756 C761 C777 C776 C762 C763 C779 C793 C740 C742 C739 C797 C764 R740 R731 R743 R742 R741 R733 RA701 R732 R709 R719 R730 R791 L709 L711 L705 TP_TESTN D704 C765 C766 C746 C744 C792 C741 C743 C780 C717 C760 C711 C706 C710 C704 R706 L790 L703 L701 L704 L713 L706 L702 IC701 FL701 D703 ...

Page 98: ...rger Unit 14 6 1 Component View 14 6 2 Flow Solder Side View CIRCUIT BOARD Charger Unit Component View PbF PQUP11464Z PQLV30054 PQJT01 PQHG01 PQHG PQHG PQHG02 PQJT02 CN1 A R5 R8 R13 R4 R3 R2 R1 R7 R10 R9 R12 R6 R11 CIRCUIT BOARD Charger Unit Flow Solder Side View PbF PQUP11464Z PQLV30054 CM CP A DCP DCM ...

Page 99: ...37 NC D O 38 NC D O 39 NC D O 40 NC D O 41 NC D O 42 EROM_DATA D I O High Low 43 EROM_CLK D O High Low 44 EROM_WP D O WP Write 45 NC D O 46 GND GND GND 47 VCC VCC VCC 48 INT0 NC D I O 49 NC D O 50 NC D O 51 NC D O 52 NC D O 53 KEY_STB _C D O Active Not 54 KEY_STB _B D O Active Not 55 KEY_STB _A D O Active Not 56 NC LINE_SZ D O 57 NC D O 58 BELL D I OFF ON 59 RLY D O Off Hook On Hook 60 NC D O 61 N...

Page 100: ...w 45 DOT_LCD_ D5 D O High Low 46 DOT_LCD_ D6 D O High Low 47 DOT_LCD_ D7 D O High Low 48 GND GND GND 49 VCC VCC VCC 50 DOT_LCD_ RESET D O Normal Reset 51 FLASH_SCK D O High Low 52 CI D O Normal 53 NC D O Normal 54 NC D O Normal 55 ANT_LED1 D O Off On 56 DOT_LCD_RS D O Data Instruct 57 DOT_LCD_ RW_WR D O Read Write 58 DOT_LCD_ E_RD D O Active Not 59 DOT_LCD_ POWER_SW D O On Off 60 NC D O Normal 61 ...

Page 101: ...101 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 15 3 Explanation of IC Terminals RF Part 15 3 1 IC701 ...

Page 102: ...102 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 15 4 Terminal Guide of the ICs Transistors and Diodes 15 4 1 Base Unit 15 4 2 Handset ...

Page 103: ...103 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 16 Exploded View and Replacement Parts List 16 1 Cabinet and Electrical Parts Base Unit ...

Page 104: ...3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 16 2 Cabinet and Electrical Parts Handset Note 1 This cable is fixed by welding Refer to How to Replace the Handset LCD P 73 2 Attach the SPACER No 121 to the exact location described above ...

Page 105: ...105 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 16 3 Cabinet and Electrical Parts Charger Unit ...

Page 106: ...106 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 16 4 Accessories and Packing Materials 16 4 1 KX TG3521BXB BXS ...

Page 107: ...107 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 16 4 2 KX TG3522BXB BXS ...

Page 108: ...108 KX TG3521BXB KX TG3521BXS KX TG3522BXB KX TG3522BXS KX TGA351BXB KX TGA351BXS 16 4 3 KX TGA351BXB BXS ...

Page 109: ...NDUCTIVE PARTS LED LENS IN USE PS HB 5 PQBC10489Z4 BUTTON LOCATOR for KX TG3521BXB for KX TG3522BXB ABS HB 5 PQBC10489Z3 BUTTON LOCATOR for KX TG3521BXS for KX TG3522BXS ABS HB 6 PQHR11276Z GUIDE JACK HOLDER PS HB 7 PQKF10731Y4 CABINET COVER for KX TG3521BXB for KX TG3522BXB PS HB 7 PQKF10731Y3 CABINET COVER for KX TG3521BXS for KX TG3522BXS PS HB 8 PQHA10023Z RUBBER PARTS FOOT CUSHION 9 PQGT19716...

Page 110: ...1H100DCQ 10P C165 ECUV1C473KBV 0 047 Ref No Part No Part Name Description Remarks C166 EEE1CA100SR 10 C167 ECUV1A224KBV 0 22 C172 ECUE1H272KBQ 0 0027 C176 PQCUV0J106KB 10 C177 ECUE1H100DCQ 10P C178 ECUE1C223KBQ 0 022 C185 ECUE1C183KBQ 0 018 C300 PSEA1VXF470 47 S C304 ECUV1A105KBV 1 C305 ECUV1H103KBV 0 01 C306 ECEA1EU101 100 S C308 ECUV1E104KBV 0 1 C331 ECUV1C474KBV 0 47 C341 ECEA0JSJ331 330 S C342...

Page 111: ...TTERY COVER for KX TGA351BXB ABS HB 122 PQKK10600Z3 LID BATTERY COVER for KX TGA351BXS ABS HB Ref No Part No Part Name Description Remarks PCB100 PQWPG3521BXR MAIN P C BOARD ASS Y RTL ICs IC371 C0CBABD00019 IC IC381 C0CBABD00011 IC IC382 C0CBAAC00083 IC Ref No Part No Part Name Description Remarks IC501 C2HBBY000067 IC 1 IC521 C0EBF0000179 IC IC541 PQWIG3521BXR IC 1 IC701 C1CB00002285 IC 2 TRANSIS...

Page 112: ...9 ECUE1H100DCQ 10P Ref No Part No Part Name Description Remarks C740 ECUE1C103KBQ 0 01 C741 ECUE1H102KBQ 0 001 C742 PQCUV0J475MB 4 7 C744 ECUE1A104KBQ 0 1 C746 ECUE1H222KBQ 0 0022 C752 ECUE1H2R0CCQ 2P C756 ECUE1H100DCQ 10P C760 ECUE1H100DCQ 10P C762 ECUE1H101JCQ 100P C763 ECUE1H101JCQ 100P C764 ECUE1H102KBQ 0 001 C765 ECUE1H221JCQ 220P C776 ECUE1A104KBQ 0 1 C777 ECUE1H102KBQ 0 001 C779 ECUE1H102KB...

Page 113: ...XZB21X35A03 PROTECTION COVER for Base Unit P2 XZB08X25B02 PROTECTION COVER for Hand set P3 PQPK15860Z GIFT BOX Ref No Part No Part Name Description Remarks A101 PQLV203BXZ AC ADAPTOR for Base Unit A102 PQLV208BXZ ACADAPTOR forChargerUnit A103 PQJA10075Z CORD TELEPHONE A104 PQKL10084Z2 STAND WALL MOUNT PS HB A105 PQQX15835Z INSTRUCTION BOOK 1 A106 PQQW15601Z LEAFLET QUICK GUIDE for Arabic A107 PQQW...

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