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Panasonic KX-TCD420GS Service Manual

Digital cordless answering system
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ORDER NO. KM40306116C2
Telephone Equipment
KX-TCD420GS / KX-A142EXS
Digital Cordless Answering System
Silver Version
(for Germany)
SPECIFICATIONS
1

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Summary of Contents for Panasonic KX-TCD420GS

  • Page 1 ORDER NO. KM40306116C2 Telephone Equipment KX-TCD420GS / KX-A142EXS Digital Cordless Answering System Silver Version (for Germany) SPECIFICATIONS...

  • Page 2: Table Of Contents

    svcdoc Telephone Equipment 1 1. ABOUT LEAD FREE SOLDER (PbF: Pb free) 2 1.1. Suggested PbF Solder 3 1.2. How to recognize that Pb Free solder is used 3 1.2.1. Base Unit PCB 3 1.2.2. Handset PCB 4 1.2.3. Charger Unit PCB 4 2.
  • Page 3 svcdoc 8.2. Making a Call 22 8.3. Answering a Call 22 8.4. Setting the Clock/Date 23 8.5. Phonebook 23 8.5.1. Storing a Caller Information 23 8.5.2. Storing the Phone Number into the Phonebook When Pre-dialling 25 8.5.3. Storing the Number from the Redial/Caller List into the Phonebook 26 8.5.4.
  • Page 4 svcdoc 14.2.2. Flow Solder Side View 48 14.3. Adjustment (Charger Unit) 48 14.4. Adjustment Standard (Charger Unit) 48 14.4.1. Flow Solder Side View 48 15. ADJUSTMENTS (HANDSET) 48 15.1. Adjustment 49 15.2. Adjustment Standard (Handset) 54 16. RF SPECIFICATION 54 16.1.

  • Page 5: Telephone Equipment

    31. CABINET AND ELECTRICAL PARTS LOCATION (HANDSET) 84 32. CABINET AND ELECTRICAL PARTS LOCATION (CHARGER UNIT) 85 33. ACCESSORIES AND PACKING MATERIALS 86 33.1. KX-TCD420GS 87 33.2. KX-A142EXS 87 34. TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 88 34.1. Base Unit 88 34.2.

  • Page 6: About Lead Free Solder (Pbf: Pb Free)

    2003 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 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.

  • Page 7: Suggested Pbf Solder

    temperature soldering iron, please be careful not to heat too long. - PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F (600°C). - If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible and be sure that any remaining is melted prior to applying the Pb solder.

  • Page 8: Handset Pcb

    Note: The location of the “PbF“ mark is subject to change without notice. 1.2.2. Handset PCB (Component View) (Flow Solder Side View) Note: The location of the “PbF“ mark is subject to change without notice. 1.2.3. Charger Unit PCB Note: The location of the “PbF“...

  • Page 9: Battery Charge

    4.2. Battery Charge At the time of shipment, the batteries are not charged. To charge, place the handset on the base unit. Please charge the batteries for about 7 hours before initial use. During charging, the battery icon is as shown below.

  • Page 10: Replacing The Batteries

    When replacing the batteries, ensure that the correct battery type is selected. - To exit the operation, press any time. - Do not use non-rechargeable batteries. If non-rechargeable batteries are fitted and start charging, it may cause the leakage of the battery electrolyte. Please use only Panasonic P03P(Ni-MH) or P03H(Ni-Cd) batteries.

  • Page 11: Location Of Controls

    5. LOCATION OF CONTROLS 5.1. Base Unit 5.2. Handset 6. SETTINGS 6.1. Connection 6.1.1. Base Unit Plug in the AC adaptor and the telephone line cord in order 1, 2, 3, 4.

  • Page 12: Charger Unit

    The AC adaptor must remain connected at all times (It is normal for the adaptor to feel warm during use). - Never install telephone wiring during a lightning storm. 6.1.2. Charger Unit The AC adaptor must remain connected at all times (It is normal for the adaptor to feel warm during use).

  • Page 13: Pin Code

    6.3. PIN Code 6.3.1. Base Unit - To exit the operation, press any time. For Service Hint: * : If the current 4-digit PIN is forgotten, press and you will be able to enter new PIN. 6.3.2. Handset...

  • Page 14: Reset Base Unit Pin To Default (0000) -When There Is No Handset Registered

    - To exit the operation, press any time. For Service Hint: * : If the current 4-digit PIN is forgotten, press and you will be able to enter new PIN. 6.3.3. Reset Base Unit PIN to Default (0000) -When There is NO Handset Registered- 6.3.3.1.

  • Page 15: Reset

    2. Plug in AC adaptor to the base. 3. Turn on the power to the JIG (9V). 4. Then connect the cable to each pins using clip. As for the connection between JIG and PCB, see below photos. <PC setting and how to reset base PIN to default (0000)> 1.

  • Page 16: Handset

    Function Initial Setting Remarks (selectable options Ringer Mode All Handsets All Handsets/Specific Handset N Number of Rings Up to 6 rings Flash/Earth Flash Flash Timing 200 msec 80/200 msec Pause Timing 3 seconds 3 seconds/5 seconds Call Restricted Handsets All Clear Each Handset can be set indivisually.

  • Page 17: Key Lock

    Function Initial Setting Remarks (selectable options Time Alarm Mode OFF/ON Alarm Time Clear OFF/Once/Daily Handset Ringer Volume Handset External Ringer Pattern 20 patterns Handset Internal Ringer Pattern 20 patterns Handset Paging Tone Pattern 20 patterns Handset Alarm Tone Pattern 20 patterns Key Tone ON/OFF Call Waiting Tone...

  • Page 18: Dialling Pause For Pbx Line/Long Distance Service Users

    RECALL is used to access special telephone services. Contact your Network provider for details. If your unit is connected to a PBX, pressing RECALL allows you to access some features of your host PBX such as transferring an extension call. 6.7.

  • Page 19: Cancelling Call Restricted Handset(S)

    - To exit the operation, press any time. - *1: The factory preset is 0000. - *2: The selected handset number flashes. 6.9. Cancelling Call Restricted Handset(s) - To exit the operation, press any time. - *1: The factory preset is 0000. - *2: The selected handset(s) will stop flashing.

  • Page 20: Selecting The Display Language

    - To exit the operation, press any time. - *1: The factory preset is 0000. - *2: If is selected, is displayed (Refer to Handset Display ()). 6.11. Selecting the Display Language - To exit the operation, press any time. - *1 You can select one of 10 languages.

  • Page 21: Automatic Route Selection

    Panasonic Service Centre for installation. On installation, you can select flash or earth mode to suit your PBX or Network provider. - To exit the operation, press any time. - *1: The factory preset is 0000. For Service Hint: Refer to Flash Time setting 6.13.

  • Page 22: Storing The Area Code(S)

    - To exit the operation, press any time. - *1: The factory preset is 0000. 6.13.2. Storing the Area Code(s) Store the area code(s) for which the chosen carrier (network) service charge rates are lower than the original carrier (network) service. Up to 25 area codes can be stored. - To exit the operation, press any time.

  • Page 23: Automatic Route Selection On/Off

    - To exit the operation, press any time. - *1: The factory preset is 0000. - *2 If you need more relating area codes to carrier codes, repeat the steps from 5. 6.13.4. Automatic Route Selection On/Off - To exit the operation, press any time.

  • Page 24: Display

    *1 If any key is not pressed over 60 seconds, the display will return to “Setting Base”. *2 Refer to PIN Code () for more details. 7. DISPLAY 7.1. Handset Display 7.2. Before Requesting Help (Troubleshooting) If you experience any problems with the normal use of your apparatus, you should unplug it from the telephone outlet and connect a known working telephone in its place.
  • Page 25 If the known working telephone still has problems, then please contact the customer service department of your Network provider. If it operates correctly, then the problem is likely to be a fault in your apparatus. In this case, contact your supplier for advice. Your Network provider may charge you if they attend a service call that is not due to apparatus supplied by them.

  • Page 26: Operations

    Cross Reference: Power On/Off Call BAR On/Off (Call Prohibition On/Off) Key Lock Call Restriction 8. OPERATIONS 8.1. Power On/Off *1 When button is released, the display changes to the standby mode. *2 The display goes blank. 8.2. Making a Call *1 If you need correction, press CLEAR.

  • Page 27: Answering A Call

    8.3. Answering a Call - Each ringer will start ringing with lower volume then gradually increase the volume when receiving a call. *1 You can also answer a call by pressing any dialling button, INTERCOM, , or 8.4. Setting the Clock/Date After a mains power failure the clock needs to be reset.
  • Page 28 8.5.1. Storing a Caller Information - To exit the operation, press any time. *1 If you need correction, press RIGHT or LEFT to move cursor then clear a character by pressing CLEAR, and/or enter characters. Characters are cleared or added to the left of the flashing character. To enter characters, see Character Selection below.

  • Page 29: Storing The Phone Number Into The Phonebook When Pre-Dialling

    - To exit the operation, press any time. *1 If there is no item stored in the phonebook, the display shows *2 Digits are cleared to the left of the flashing digit. *3 Digits are added to the left of the flashing digit. If you need to clear or add more than one digit, repeat the steps from 4.

  • Page 30: Storing The Number From The Redial/Caller List Into The Phonebook

    - To exit the operation, press any time. *1 If you need correction, press CLEAR. Digit is cleared to the left, then enter numbers. 8.5.3. Storing the Number from the Redial/Caller List into the Phonebook - To exit the operation, press any time.

  • Page 31: Disassembly Instructions

    - To exit the operation, press any time. *1 If there is no item stored in the phonebook, the display shows *2 The number is flashing if the dialling button is already assigned as a hot key. *3 Phonebook registration will be remained even hot key registration is cleared. 9.

  • Page 32: Handset

    Shown in Fig.- To Remove Remove Lower Cabinet Screws (2.6 × 12)..(A) × 2 Main P.C. Board Main P.C. Board 9.2. Handset...

  • Page 33: Charger Unit

    Shown in Fig.- To Remove Remove Rear Cabinet Screws (2 × 10)..(B) × 2 Rear Cabinet Follow the procedure. Main P.C. Board Screw (2 × 8)....(C) × 1 Screws (2 × 8).....(D) × 2 Main P.C. Board 9.3. Charger Unit...

  • Page 34: Assembly Instructions

    Shown in Fig.- To Remove Remove Lower Cabinet Screws (2.6 × 14)..(E) × 2 Main P.C. Board Main P.C. Board 10. ASSEMBLY INSTRUCTIONS 10.1. Warning When Constructing the Base Unit 11. TROUBLESHOOTING GUIDE Flow Chart...

  • Page 35: Check Power

    Cross Reference: Check Power Bell Reception Check Battery Charge Check Link Check Handset Transmission Check Handset Reception SIGNAL ROUTE TAM Voice Prompt Problems 11.1. Check Power 11.1.1. Base Unit Is the AC Adaptor inserted into AC outlet? (Check AC Adaptor’s specification.)

  • Page 36: Handset

    Cross Reference Power Supply Circuit Note: BBIC is IC8. 11.1.2. Handset Cross Reference Power Supply Circuit/Reset Circuit Note: BBIC is IC1. 11.2. Check Battery Charge 11.2.1. Base Unit Cross Reference:...

  • Page 37: Handset

    Charge Circuit 11.2.2. Handset Cross Reference: Check Power Charge Circuit Note: BBIC is IC1. 11.2.3. Charger Unit Cross Reference: Power Supply Circuit 11.3. Check Link 11.3.1. Base Unit...

  • Page 38: Handset

    Cross Reference: Power Supply Circuit Adjustment (Base Unit) 11.3.2. Handset...

  • Page 39: Check Handset Transmission

    Cross Reference Power Supply Circuit Adjustment 11.4. Check Handset Transmission Cross Reference: SIGNAL ROUTE 11.5. Check Handset Reception Cross Reference: HOW TO CHECK THE HANDSET SPEAKER SIGNAL ROUTE 11.6. Check Caller ID Cross Reference: SIGNAL ROUTE 11.7. TAM Voice Prompt Problems...

  • Page 40: Bell Reception

    Cross Reference: Check Link Check Handset Reception EEPROM LAYOUT (BASE UNIT) TAM Voice Prompt Download 11.8. Bell Reception 11.8.1. Base Unit Note: BBIC is IC8. 11.8.2. Handset Cross Reference:...

  • Page 41: Check Procedure (Base Unit)

    Telephone Line Interface Check Link Note: BBIC is IC1. 12. CHECK PROCEDURE (BASE UNIT) 12.1. Preparation 12.1.1. Equipment Required - DECT tester: Rohde & Schwarz, CMD 60 is recommended. - Frequency counter: it must be precise to be able to measure 1Hz (precision;...

  • Page 42: Tam Voice Prompt Download

    1. Open a window of MS-DOS mode from the start-up menu. 2. Change a directory to the one with “RTX_COM” contained. 3. Type “SET RTX_COM=1” from the keyboard (when COM port 1 is used for the connection). 4. Type “doskey”. Note: See the table below for frequently used commands.

  • Page 43: Jigs And Pc

    (precision; ±4ppm). Hewlett Packard, 53131A is recommended. - DC power: it must be able to output at least 1A current under 2.4V for Handset, 9V for JIG. - Digital multi-meter (DMM): it must be able to measure voltage and current. - Oscilloscope 13.1.2.

  • Page 44: Adjustments (Base Unit And Charger Unit)

    Command name Function Example rdeeprom Read the data of EEPROM Type “rdeeprom 00 00 FF”, and the data from address “00 00” to “FF” is read out. readid Read ID (RFPI) Type “readid”, and the registered ID is read out. writeid Write ID (RFPI) Type “writeid 00 18 E0 0E 98”, and the...
  • Page 45 Items Procedure* Check Adjustment Replac Point Parts 1. Confirm that the voltage between J101 and GND is 2.65V ± 0.2V. 2.65V Supply C40,C41 Confirmation C43,C44 C32,C33 C37,C 1. Confirm that the voltage between TP11 and GND is 4.0V ± 0.2V. 4.0V Supply D4,C36, Confirmation...
  • Page 46 Items Procedure* Check Adjustment Replac Point Parts Hookswitch 1. Connect J2 (Telephone Socket) to Tel-simulator which is connected with 600 IC8,R12, 2. Set line voltage to 48V at on hook condition and line current to 40mA. Check with DC 3. Execute the command "hookoff" Characteristics 4.
  • Page 47 Items Procedure* Check Adjustment Replac Point Parts Modulatoin Follow steps 1 to 3 of (H) above. IC6,IC4 Check and 4. Confirm that the B-Field Modulation is 340kHz/div ~ 402kHz/ Adjustment C57,C61 div using data type Fig31. 5. Adjust the B-Field Modulation if required. (Execute the C77,C78 command "readmod"...
  • Page 48 Items Procedure* Check Adjustment Replac Point Parts Sensitivity Follow steps 1 to 3 of (H) above. IC6,IC4 Receiver 4. Set DECT tester power to -88dBm. Confirmation C57,C61 5. Confirm that the BER is < 1000ppm. C77,C78 C68,C69 R80,C63 R83,R84 L3,C79,C C66,D10 Timing Follow steps 1 to 3 of (H) above.
  • Page 49 Items Procedure* Check Adjustment Replac Point Parts RSSI Level Follow steps 1 to 3 of (H) above. IC6,IC4 Confirmation 4. Set DECT tester power to -88dBm. C57,C61 5. Execute the command "readrssi". 6. Confirm: 29 < returned value < 3E (hex) C77,C78 C68,C69 R80,C63...
  • Page 50 Items Procedure* Check Adjustment Replac Point Parts 1. Configure the DECT tester (CMD60) as follows; Receive Audio IC6,IC4 <Setting> Check and Adjustment -Test mode: FP C57,C61 -Mode: Normal -PMID: 0000 2. Execute the command "testmode". C77,C78 3. Initiate connection from DECT tester. 4.

  • Page 51: Adjustment Standard (Base Unit)

    Items Procedure* Check Adjustment Replac Point Parts 1. Configure the DECT tester (CMD60) as follows; Transmit Audio IC6,IC4 <Setting> Check and Adjustment -Test mode: FP C57,C61 -Mode: Normal -PMID: 0000 2. Execute the command "testmode". C77,C78 3. Initiate connection from DECT tester. 4.
  • Page 52 14.2.1. Component View Note: (H) - (O) is refered to ADJUSTMENTS (BASE UNIT AND CHARGER UNIT) 14.2.2. Flow Solder Side View Note: (A) - (P) is refered to ADJUSTMENTS (BASE UNIT AND CHARGER UNIT) 14.3. Adjustment (Charger Unit) Items Procedure Check Adjustment Replac...
  • Page 53 Symptom Remedy The movement of Battery Low indicator is wrong. Make confirmation in item (A)~(C (F)~(G) The handset does not respond to a call from base unit. Make adjustments in item (A)~(C (H), (J)~(N) The handset does not transmit or the transmit frequency is off. Make adjustments in item (A)~(C (H)~(K), (M) The transmit frequency is off.
  • Page 54 Items Procedure* Check Adjustment Replac Point Parts 1. Confirm that the voltage between TP18 and GND is 0V ± 0.4V. VBACK Status IC1,F1,R Confirmation R4,C33 D1,C15 C14,Q1 R2,D2,R C26,R16 C16,C 1. BBIC Confirmation (Execute the command "getchk"). BBIC IC1,X1,C 2. Confirm the returned checksum value. Confirmation Connection of checksum value and program number is shown below.
  • Page 55 Items Procedure* Check Adjustment Replac Point Parts 1. Apply 2.3V ± 0.005V between TP3(+) and TP4(-). Battery Monitor IC1,D4, 2. Execute the command "readbatt". Confirmation L5,Q2,Q 3. Confirm: 98 < returned value < A8 (Hex) R6,D2,R 4. Execute the command "WRTBAT2 XX". XX: (returned value) - 06 (Hex) C26,F1,R R4,C3...
  • Page 56 Items Procedure* Check Adjustment Replac Point Parts (K) Frequency Offset Follow steps 1 to 4 of (I) above. IC1,IC3,C Confirmation 5. Confirm that the frequency offset is < ± 50kHz. C66,C60 C57,C55 C62,R23 C63,C64 Sensitivity Follow steps 1 to 4 of (I) above. IC1,IC3,C Receiver 5.
  • Page 57 Items Procedure* Check Adjustment Replac Point Parts RSSI Level Follow steps 1 to 4 of (I) above. IC1,IC3,C Confirmation 5. Set DECT tester power to -88dBm. C66,C60 6. Execute the command "readrssi" 7. Confirm that the returned value is 0x34 ± A (hex). C57,C55 C62,R23 C63,C64...
  • Page 58 After the measuring, sock up the solder of TP. PC Setting () is required beforehand. The connection of adjustment equipment are as shown in Adjustment Standard (Handset) 15.2. Adjustment Standard (Handset) When connecting the Simulator Equipments for checking, please refer to below. Note: (A) - (P) is refered to ADJUSTMENTS (HANDSET)
  • Page 59 1. Prepare the digital voltmeter, and set the selector knob to ohm meter. 2. Put the probes at the speaker terminals as shown below.
  • Page 60 18. FREQUENCY TABLE (MHz)
  • Page 61 BASE UNIT HANDSET Receive Frequency Channel No Transmit Frequency Transmit Frequency Receive Frequenc 1897.344 1897.344 1897.344 1897.344 1895.616 1895.616 1895.616 1895.616 1893.888 1893.888 1893.888 1893.888 1892.160 1892.160 1892.160 1892.160 1890.432 1890.432 1890.432 1890.432 1888.704 1888.704 1888.704 1888.704 1886.976 1886.976 1886.976 1886.976 1885.248 1885.248...
  • Page 62 - Amplifier for transmission and reception - EEPROM: IC4 - Temporary operating parameters (for RF, etc.) - Flash PROM: IC7 - 2M bit - Operational Firmware for CPU - Serial Flash ROM: IC6 - 4M bit - Audio data for TAM operation - Additionally, - Power Supply Circuit (+4.0V, +2.65V output) - Crystal Circuit (10.368MHz)
  • Page 63 20.3. Telephone Line Interface <Function> - Bell signal detection - Clip signal detection - ON/OFF hook circuit - Audio circuits Bell & Clip (: Calling Line Identification Presentation: Caller ID) signal detection: In the standby mode, Q2 is open to cut the DC loop current and decrease the ring load. When ring voltage appears at the TP3 (A) and TP40 (B) leads (when the telephone rings), the signal is transferred as follows;...
  • Page 64 signal. The unit is consequently in an off-hook condition. When IC8 detects a ring signal or press the TALK Key onto the handset, Q4 turns on and then Q2 turns on, thus providing an off-hook condition (active DC current flow through the circuit) and the following signal flow is for the loop current.
  • Page 65 - All data signals (forming/analyzing ACK or CMD signal) - All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD) - RF Module: IC3 - PLL Oscillator - Detector - Compress/Expander - Amplifier for transmission and reception 22.2. Power Supply Circuit/Reset Circuit Circuit Operation: When power on the Handset, the voltage is as follows;...
  • Page 66 The BBIC detects this level and " " starts flashing and "battery alarm" starts ringing. - Power Down Battery voltage: V(Batt) < 2.2V The BBIC detects this level and power down. 23. CIRCUIT OPERATION (CHARGER UNIT) 23.1. Power Supply Circuit The power supply is as shown.
  • Page 67 25. CPU DATA (BASE UNIT) 25.1. IC8 (BBIC)
  • Page 68 Descriptiojn Hi-z Remarks for Down Load for Down Load for Down Load SYRI Active Active VSSO XTAL X'tal LOAD X'tal VDDREG RXDSG Active Active VDDTXDA TXDA Active Active (NO USE) DAON PA-ON PA-OFF SYCL Active Active SYEN Normal Latch SYDA Active Active RXDA...
  • Page 69 Memory...
  • Page 70 Descriptiojn Hi-z Remarks for Flash Memory for Flash Memory for Flash Memory for Flash Memory for Flash Memory for Flash Memory for Flash Memory for Flash Memory for Flash Memory for Flash Memory DO/I for Flash Memory DO/I for Flash Memory DO/I for Flash...
  • Page 71 Descriptiojn Hi-z Remarks P0.1 for Flash Memory P0.0 No Key for Key PX.2 Write IC4 for Flash Memory PX.1 Read IC4 for Flash Memory (NO USE) (NO USE) LED ON LED OFF (NO USE) (NO USE) TONE Ring Det (NO USE) (NO USE) (NO USE) (NO USE)
  • Page 72 Descriptiojn Hi-z Remarks for Flash Memory for Flash Memory (NO USE) (NO USE) (NO USE) (NO USE) (NO USE) (NO USE) VSSA VDDA (NO USE) (NO USE) (NO USE) (NO USE) (NO USE) (NO USE) (NO USE) HOPI (NO USE) REFVH BREF VSSA...
  • Page 73 26. CPU DATA (HANDSET) 26.1. IC1 (BBIC) Description Hi-z Remarks LCD_SEGMENT Active LCD_COMMON Active LCD_COMMON Active LCD_COMMON Active LCD_COMMON Active LCD_COMMON Active LCD_COMMON Active PA_SW PA ON T/R SW Transmit RX_DATA Active SYEN Active SYDA Active SYCL Active TX_DATA Active KEY_IN No Key KEY_IN...
  • Page 74 Description Hi-z Remarks LSRP BANDGAP_REF MICS MICP MICN Reference Voltage RSSI P0.4 AD4N AD4P (NO USE) KEY_STRB Active KEY_STRB Active KEY_STRB Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active KEY_STRB Active KEY_STRB Active LCD_SEGMENT Active LCD_SEGMENT Active VDD for EEPROM I2DAT D.I/O Active I2CLK...
  • Page 75 Description Hi-z Remarks LCD_SEGMENT Active (NO USE) Power Select Low Power LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active LCD_SEGMENT Active 27. EEPROM LAYOUT (BASE UNIT) 27.1. Scope The purpose of this section is to describe the layout of the EEPROM (IC1) for the KX-TCD420 Base Unit.
  • Page 76 Country Default - no specific country setting, so revert to default value Setting 27.3. EEPROM Layout 27.3.1. General Setup Address Default Name Type Description Country Setting 0000-01 00 E0 EepromOscillator Frequency adjustment 0002 ModulationDeviation Modulation adjustment 0020 RFPI (ID for Base Unit) RFPI 0025 00 00...
  • Page 77 Address Default Name Type Description Country Setting 09F1 Handset registration info - registration O HsRegInfo.RegFlags 1=reg, 0=no reg 09F2 Handset registration info - EMC flags HsRegInfo.EmcFlags 6..7: not used 0..5: handset 1..6 info, 1=known , 0= unknown 09F3 RingMode Ring mode. Modes used in KAMMA4 are 20h and 21h.
  • Page 78 Address Default Name Type Description Country Setting 0F1C Detect CLIP detect configuration 0-2: Mode: 0: Learn mode, 1: DTMF only, 3: Generic mod, 4: Russian CL only 3: Unused4 4: Onhook: 1=enable 0=disable 5: Offhookk: 1=enable 0=disable 6: Msgwaiting: 1=enable 0=disable 7: Unused7 0F37..38 3D 01...
  • Page 79 Address Default Name Type Description Country Setting 0F40 CountryCode Country code 0: Germany 1: Greece 2: Turkey 3: England 4: Switzerland 5: Poland 7: France 8: Denmark A: Italy C: Czech E: Hungary F: Spain 14: Russia 0F41-0F60 TamTagInfo Message TAG information Bit 0-3 Odd number MSG, 4-7 Even number MSG 0: Reserve...
  • Page 80 Address Default Name Type Description Country Setting 0F62 TamPrgRings Current number of rings for automatic answering Range:0(Auto), 2-7 0F63-0F64 TamPrgRmtCode Current Remote code e.g. 123 Address 0x0F63 0xF1 Addres 0x0F64 0x23 0F65 CountryData Each country data 0: Reserve 1: Reserve 2: Max time in Line Remote Not Used 3: TimeData for voice prompt 0:24hou :12hour...
  • Page 81 Address Default Name Type Description Country Setting 0F68 TamPrgWordMode Language select data For Switzerland 0:Germany/1:French For Czech 0:Chezh/1:Slovakian 0F69 TamRingsSetNum Number of rings select range for automatic answering 0x25: 2 ~ 5 Rings 0x27: 2 ~ 7 Rings 0F6A TamRingsDefNum Number of rings default data 0: Default is Automatically Turn on fo Toll saver...
  • Page 82 The EEPROM contains hardware, software, and user specific parameters. Some parameters are set during production of the handset e.g. crystal oscillator adjustment at 0000..01, some are set by the user when configuring the handset e.g. ringer volume at 0F38, and some during normal use of the phone e.g.
  • Page 83 Address Default Name Type Description Country Setting 0100-0104 RFPI_1 (Base 1) RFPI for registration 1 0105 SerClass_1 Service class for registration 1 0106 LAL_1 Location area level for registration 1 0107 IPUI_LEN_1 IPUI length for registration 1 0108-0114 IPUI_1 IPUI for registration 1 0115 ZAP_1 ZAP for registration 1...
  • Page 84 German Address Default Name Type Description Country Setting 0467 FactoryLanguageSetting 0A Factory setting for language: 00 = English 01 = Spanish 02 = French 03 = Italian 04 = Dutch 05 = Turkish 06 = Hungarian 07 = Portuguese 08 = Polish 09 = Command 0A = German 0469...
  • Page 85 Address Default Name Type Description Country Setting 0F36 GR-offset for Bit7: AOG volumestep 1 Bit6: AOG2 Bit5, bit0: Gain-receive (values ranging from 0x00 to 0x30, each step representi 1 dB) 0F37 GR-offset for Bit7: AOG volumestep 2 Bit6: AOG2 Bit5, bit0: Gain-receive (values ranging from 0x00 to 0x30, each step representi 1 dB) 0F38...
  • Page 86 Recommended Flux: Specific Gravity 0.82. Type RMA (lower residue, non-cleaning type) Note: See ABOUT LEAD FREE SOLDER (PbF: Pb free) 29.2. Procedure 1. Tack the flat pack IC to the PCB by temporarily soldering two diagonally opposite pins in the correct positions on the PCB. Be certain each pin is located over the correct pad on the PCB.
  • Page 87 1. Add a small amount of solder to the bridged pins. 2. With a hot iron, use a sweeping motion along the flat part of the pin to draw the solder from between the adjacent pads. 30. CABINET AND ELECTRICAL PARTS LOCATION (BASE UNIT)
  • Page 89 31. CABINET AND ELECTRICAL PARTS LOCATION (HANDSET) 32. CABINET AND ELECTRICAL PARTS LOCATION (CHARGER UNIT)
  • Page 91 33. ACCESSORIES AND PACKING MATERIALS 33.1. KX-TCD420GS 33.2. KX-A142EXS...
  • Page 92 34. TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES 34.1. Base Unit...
  • Page 93 34.2. Handset 34.3. Charger Unit 35. REPLACEMENT PARTS LIST Note:...
  • Page 94 1. RTL (Retention Time Limited) Note: The marking (RTL) indicates that the Retention Time is limited for this item. After the discontinuation of this assembly in production, the item will continue to be available for a specific period of time. The retention period of availability is dependant on the type of assembly, and in accordance with the laws governing part and product retention.
  • Page 95 Ref. No. Part No. Part Name & Description Remarks PQGG10154V4 GRILLE ABS-HB PQKM10586Z3 CABINET BODY ABS-HB PQHR10962Z OPTIC CONDUCTIVE PARTS, LED LENS PQJT10203Z TERMINAL PQKE10356Z1 GUIDE, CHARGE TERMINAL CASE POM-HB PQSA10131Z ANTENNA, MAIN PQSA10132Z ANTENNA, SUB PQYF10560Z3 CABINET COVER ABS-HB PQGT15747Z NAME PLATE 35.1.2.
  • Page 96 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ184 180K ERJ3GEYJ104 100K PQ4R10XJ562 5.6K ERJ3GEYJ103 ERJ3GEYJ222 2.2K PQ4R18XJ000 ERJ3GEYJ333 ERJ3GEYJ562 5.6K ERJ12YJ220 ERJ3GEYJ104 100K ERJ3GEYJ333 ERJ12YJ560 ERJ3GEYJ474 470K ERJ3GEYJ105 ERJ3GEYJ221 ERJ3GEYJ391 ERJ3GEYJ102 ERJ3GEYJ103 ERJ3GEYJ102 ERJ3GEYJ102 ERJ3GEYJ684 680K ERJ3GEYJ684 680K ERJ3GEYJ473 ERJ3GEYJ124 120K...
  • Page 98 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ154 150K ERJ3GEYJ390 ERJ3GEYJ390 ERJ3GEYJ330 ERJ3GEYJ181 ERJ3GEYJ181 ERJ3GEYJ681 ERJ3GEYJ155 1.5M PQ4R10XJ562 5.6K ERJ3GEYJ472 4.7K ERJ3GEY0R00 JMP9 PQ4R10XJ000 (CAPACITORS) ECUV1C104KBV 0.1 ECQE2E474KZ 0.47 ECUV1H103KBV 0.01 ECUV1H103KBV 0.01 ECKD2H681KB 680P ECKD2H681KB 680P ECUV1H103KBV 0.01 ECUV1H103KBV 0.01 PQCUV1A105KB 1 ECUV1H103KBV 0.01...
  • Page 99 Ref. No. Part No. Part Name & Description Remarks ECUV1H100DCV 10P ECUV1H100DCV 10P ECUV1H330JCV 33P ECUV1A475KB ECUV1H060DCV 6P ECUV1H100DCV 10P ECUV1H100DCV 10P ECUV1H030CCV 3P ECUV1H2R0CCV 2 ECUV1H100DCV 10P ECUV1H2R0CCV 2 ECUV1A475KB ECUV1H102KBV 0.001 ECUV1H101JCV 100P ECUV1H102KBV 0.001 ECUV1H100DCV 10P ECUV1H100DCV 10P PQCUV1H020CC 2P ECUV1H2R0CCV 2 ECUV1H100DCV 10P...
  • Page 100 Ref. No. Part No. Part Name & Description Remarks PQGP10225Y3 PANEL, LCD AS-HB PQKM10587W4 CABINET BODY ABS-HB PQHS10553Z TAPE, DOUBLE SIDE PQHS10554Z SPACER, LCD PQBC10375Z1 PUSH BUTTON, NAVI PQSX10224Q KEYBOARD SWITCH, 20KEY PQHS10467Z COVER, SP NET L0AD02A00016 SPEAKER PQSA10133Z ANTENNA PQJT10204Z TERMINAL (L) PQJT10205Z...
  • Page 101 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ153 ERJ3GEY0R00 ERJ6RSJR10V ERJ3GEY0R00 ERJ3GEYJ2R2 ERJ3GEY0R00 (CAPACITORS) ECUV1A475KB ECUV1C104KBV 0.1 ECUV1C104KBV 0.1 ECST0JY475 ECUV1H100DCV 10P ECUV1C104KBV 0.1 ECUV1H100DCV 10P ECUV1H100DCV 10P ECUV1H100DCV 10P ECUV1H100DCV 10P EEE1AA221P EEE1AA221P ECUV1H1R0CCV 1 ECUV1H180JCV 18P ECUV1C104KBV 0.1 ECUV1C104KBV 0.1 ECUV1C104KBV 0.1...
  • Page 102 Ref. No. Part No. Part Name & Description Remarks PQLV30018ZS1 ACCESSORY PARTS PQGG10155Y4 GRILLE ABS-HB PQKM10591Z2 CABINET BODY PS-HB PQKE10356Z1 GUIDE, CHARGE TERMINAL CASE POM-HB PQJT10206Z CHARGE TERMINAL PQHX10991Z CUSHION, URETHANE FORM PQMH10426Z WEIGHT PQYF10563Z2 CABINET COVER PS-HB PQGT15558X NAME PLATE 35.3.2.
  • Page 103 Part No. Part Name & Description Remarks PQZZTCD705BX I2C PCB PQZZ1CD705BX RS232C CABLE PQZZ2CD705BX CLIP CABLE PQZZ3CD705BX DC CABLE PQZZTCD420E BATCH FILE Note: CHECK PROCEDURE (BASE UNIT) (), and CHECK PROCEDURE (HANDSET) 35.6. Memo 36. SCHEMATIC DIAGRAM (BASE UNIT) 37. SCHEMATIC DIAGRAM (HANDSET) 38.
  • Page 104 CIRCUIT BOARD (CHARGER UNIT) Component View...
  • Page 105 TALK REDIAL BOOK LEFT DOWN RIGHT PROG POWER KX-A142EXS CIRCUIT BOARD (HANDSET) Flow Solder Side View...
  • Page 106 TP12 TP14 RF Clock (BBIC: 27) (2.65V) (TP3) (4V) (BBIC: 23 10.368 MHz) TP16 TP12 TP13 TP17 TP14 TP19 TP18 TP10 TP2: SP+ TP1: SP- (BBIC: 41) (BBIC: 42) KX-A142EXS CIRCUIT BOARD (HANDSET) Component View...
  • Page 107 CHARGE IC3 Output (2.8V) CHARGE+ J104 J101 J103 J102 J105 Digital CHARGE TP13 CHARGE Volt Meter TP15 TP11 TP106 TP10 IC2 Input IC2 Output RF Clock (5.5V) (10.368MHZ) (4.0V) KX-TCD420GS CIRCUIT BOARD (BASE UNIT) Flow Solder Side View...
  • Page 108 34 33 32 31 30 29 JMP8 JMP9 JMP7 SCLK 11 12 1314 15 16 17 JMP51 JMP52 JMP53 JMP50 BELL RESET BELL LED (BBIC:7 (BBIC: 81) (BBIC: 143) (BBIC: 76) 10.368 MHz) KX-TCD420GS CIRCUIT BOARD (BASE UNIT) Component View...
  • Page 109 DC_PLUG Charge_plus Charge_minus pinL SCHEMATIC DIAGRAM (CHARGER UNIT)
  • Page 110 TP11 K0.1 R5 330 C4 K0.1 R7 330 R1 2.2K K0.1 K0.1 (24) K0.1 R17 0 K0.1 1 SP+ 2 SP- R20 0 TP16 TP17 (25) (26) ’POWER’ (27) (28) (29) A201 TP15 R24 0 VCC_PA (30) TXDA 5 RSSI PAON R18 33 6 VCC_OC...
  • Page 111 Frequency 324KHz 4.3V 4.1V DC TP14 47uH 2.4V BATTERY+ BATTERY- 3.3K 2.65V 10uH CHARGE+ CHARGE- 10uH ’BATT’ K0.1 TP12 ’SDA’ K0.1 ’SCL’ ’VBACK’ TP18 ’GND’ TP10 PL.13 81 PL.13 P0.5(AD4N) PL.14 51:P0.6(AD4P) 82 PL.14 P0.4(ADBAT) PL.15 83 PL.15 ADRSSI PL.16 84 PL.16 ADREF 2.65V...
  • Page 112 TP11 K0.1 R5 330 C4 K0.1 R7 330 R1 2.2K K0.1 K0.1 (24) K0.1 R17 0 K0.1 1 SP+ 2 SP- R20 0 TP16 TP17 (25) (26) ’POWER’ (27) (28) (29) A201 TP15 R24 0 VCC_PA (30) TXDA 5 RSSI PAON R18 33 6 VCC_OC...
  • Page 113 8 SYCL SYDA 9 SYDA RXDA SYEN 10 SYEN D10P (15) 11 GND RXDSG SYRI 4.7u RXDA (20) +2.8V DRON RX-DATA TP15 +2.8V FREQ 10.368MHz 10.368MHz burst 428 s 406 s peak +3.1V : No Components KX-TCD420GS SCHEMATIC DIAGRAM (BASE UNIT)
  • Page 114 +60V:DC ON-HOOK +10V:DC OFF-HOOK ON-HOOK: 0V LINE VOLTAGE 60V DC OFF-HOOK: about DC 9.8V JMP1 680p/500V 100K JMP9 5.6k JMP2 2.2K JMP3 680p/500V JMP6 JMP4 0V: ON-HOOK OPTION4 +0.7V DC: OFF-HOOK RLY1 +2.8V K0.1 500V1000P 680K 500V1000P K0.1 680K +2.8V 120K J150P +4.0V DC...
  • Page 115 8 SYCL SYDA 9 SYDA RXDA SYEN 10 SYEN D10P (15) 11 GND RXDSG SYRI 4.7u RXDA (20) +2.8V DRON RX-DATA TP15 +2.8V FREQ 10.368MHz 10.368MHz burst 428 s 406 s peak +3.1V : No Components KX-TCD420GS SCHEMATIC DIAGRAM (BASE UNIT)
  • Page 116 Speech Burst RXDA Decoding Decoding EARPIECE TXDA Speech Burst Encoding Encoding Module RSSI ADPCM SYRI Codec Interface Analog SYEN Filter Front XTAL CHARGE CHARGE CHARGE 10.368 CONTACTS CIRCUIT CHARGE DETECT ON SWITCH EEPROM VDDBAT 53~55, 59, 60 BATTERY SWITCHED ROWS TERMINAL SUPPLY SWITCH...
  • Page 117 Flash Register CONTACT A0-A17 ADDRES BBIC 10.368 PROM D0-D7 DATA VUNREG CTRL 4.0V to AC Adaptor Reg. EEPROM 4.0V Page 103 104 106 105 107 2.65V Reg. 2.65V 11 14 13 12 Serial Flash ROM KX-TCD420GS BLOCK DIAGRAM (BASE UNIT)
  • Page 118 (F) (G) 2.20V ~ 2.40V TP16 TP12 TP13 TP17 TP14 TP19 AF SG DECT TESTER CMD60 TP18 TP10 Digital DECT tester Volt Meter CMD60 AF Volt Meter Oscilloscope DECT TESTER CMD60 Digital (I) (J) (K) (L) (M) Volt Meter (N) (O) (P) Frequency (D) (E) Current...
  • Page 119 12Ω/2W Digital Volt Meter...
  • Page 120 Digital Volt Meter 12Ω/2W (D) (E) (F) (G) (H) (N) (O) Digital To PC (JIG) Digital Volt Meter Volt Meter J102 J103 J104 J101 J105 CHARGE TP13 CHARGE Frequency TP15 Counter TP11 TP106 TP10 Digital Volt Meter DTMF tester (F) (N) (O) Simulator...
  • Page 121 AF Volt Meter Tel Simulator DECT tester CMD60 (N) (O) (H) (I) (J) (K) (L) AF Generator JMP4 JMP2 JMP6 JMP1 JMP5 JMP3 JMP8 JMP9 JMP7 SCLK JMP51 JMP52 JMP53 JMP50...
  • Page 122 CHG terminal is properly fit in the cabinet. CHG terminal comes out of rib by pulling black lead wire when opening the cabinet and turning the PCB over. The terminal cannot have enough elastic force, cannot have good contact with handset, and it will result in charge problem.
  • Page 123 Base PCB J105 J102 J103 J104 J103 GND MODE SCL SDA VDD Clip...
  • Page 124 Marked Marked (Component View) (Flow Solder Side View)
  • Page 125 TALK REDIAL BOOK LEFT DOWN RIGHT PROG POWER Marked...
  • Page 126 Marked...
  • Page 127 J104 J101 J103 J102 J105 CHARGE TP13 CHARGE TP15 TP11 TP106 TP10 Marked...
  • Page 128 Marked...
  • Page 129 CIRCUIT BOARD (CHARGER UNIT) Flow Solder Side View...

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