Panasonic KX-TCD420GS Service Manual Download Page 106

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C54

R23

R24

C63

C66

C62

C65

C14

TP1

TP2

PbF

C15

C10

R17

C12

R11

R16

C22

C30

C26

C28

C29

C16

C17

R12

R22

C33

MIC

C11

R20

C21

C25

R19

IC1

IC2

100

R18

C27

TP18

C20

C23

C18

R21

C24

C31

TP19

TP13

TP17

TP14

TP16

TP12

TP3

TP4

TP10

BAT

GND

SCL

SDA

C57

C64

C56

C55

13
14

15
16

33
32

31
30

IC3

C60

TP2: SP+

(BBIC: 41)

TP1: SP-

(BBIC: 42)

TP14

(4V)

RF Clock
(BBIC: 23 10.368 MHz)

VDD

(2.65V)

CDT

(BBIC: 27)

TP12

CN3

(TP3)

GND

TP4

KX-A142EXS CIRCUIT BOARD (HANDSET) Component View

Summary of Contents for KX-TCD420GS

Page 1: ...ORDER NO KM40306116C2 Telephone Equipment KX TCD420GS KX A142EXS Digital Cordless Answering System Silver Version for Germany SPECIFICATIONS 1 ...

Page 2: ...hen There is NO Handset Registered 10 6 3 3 1 Symptom 10 6 3 3 2 Thinkable Situation 10 6 3 3 3 Remedy 10 6 4 Reset 11 6 4 1 Base Unit 11 6 4 2 Handset 12 6 5 Key Lock 13 6 6 Recall Feature 13 6 7 Dialling Pause for PBX line long distance service users 14 6 8 Call Restriction 14 6 9 Cancelling Call Restricted Handset s 15 6 10 Call BAR On Off Call Prohibition On Off 15 6 11 Selecting the Display L...

Page 3: ...32 11 2 2 Handset 33 11 2 3 Charger Unit 33 11 3 Check Link 33 11 3 1 Base Unit 33 11 3 2 Handset 34 11 4 Check Handset Transmission 35 11 5 Check Handset Reception 35 11 6 Check Caller ID 35 11 7 TAM Voice Prompt Problems 35 11 8 Bell Reception 36 11 8 1 Base Unit 36 11 8 2 Handset 36 12 CHECK PROCEDURE BASE UNIT 37 12 1 Preparation 37 12 1 1 Equipment Required 37 12 1 2 JIGs and PC 37 12 2 PC Se...

Page 4: ...RCUIT OPERATION HANDSET 60 22 1 Outline 60 22 2 Power Supply Circuit Reset Circuit 61 22 3 Charge Circuit 61 22 4 Battery Low Power Down Detector 61 23 CIRCUIT OPERATION CHARGER UNIT 62 23 1 Power Supply Circuit 62 24 SIGNAL ROUTE 62 25 CPU DATA BASE UNIT 63 25 1 IC8 BBIC 63 26 CPU DATA HANDSET 68 26 1 IC1 BBIC 69 27 EEPROM LAYOUT BASE UNIT 71 27 1 Scope 71 27 2 Introduction 71 27 3 EEPROM Layout ...

Page 5: ...e Unit 90 35 1 1 Cabinet and Electrical Parts 90 35 1 2 Main P C Board Parts 91 35 2 Handset 95 35 2 1 Cabinet and Electrical Parts 95 35 2 2 Main P C Board Parts 96 35 3 Charger Unit 97 35 3 1 Cabinet and Electrical Parts 97 35 3 2 Main P C Board Parts 98 35 4 Accessories and Packing Materials 98 35 4 1 KX TC420GS 98 35 4 2 KX A142EXS 98 35 5 Fixtures and Tools 98 35 6 Memo 99 36 SCHEMATIC DIAGRA...

Page 6: ...e 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 although with some precautions standard Pb solder can also be used Caution PbF solder has a melting point that is 50 F 70 F 30 C ...

Page 7: ...ch may flow onto the opposite side See the figure below 1 1 Suggested PbF Solder There are several types of PbF solder available commercially While this product is manufactured 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...

Page 8: ...recurring malfunctions 1 Cover the plastic parts boxes with aluminum foil 2 Ground the soldering irons 3 Use a conductive mat on the worktable 4 Do not touch IC or LSI pins with bare fingers 3 CAUTION Danger of explosion if battery is incorrectly replaced Replace only with the same or equivalent type recommendenced by the manufacturer Dispose of used batteries according to the manufacture s Instru...

Page 9: ...nit In normal use the handset and the base unit should be powered on at all times 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 4 3 Battery Life Battery life is dependent on use a...

Page 10: ...il battery icon flashes 4 4 Replacing the Batteries If the icon flashes after a few telephone calls even when the handset batteries have been fully charged 2 batteries must be replaced Charge new batteries for approximately 7 hours before initial use The telephone line cord must not be connected to the telephone socket at this time When replacing the batteries ensure that the correct battery type ...

Page 11: ...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 7 ...

Page 12: ...al 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 6 2 Symbols Used in This Service Manual 8 ...

Page 13: ...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 9 ...

Page 14: ...ation Customer may ask to reset base PIN because they forget it Customer may bring only a base unit for repair and there is no handset registered to the base Need to register another handset to the base to confirm if the unit works properly after repair When original handset has broken and customer purchased a new one if customer forget base PIN customer cannot register the new handset and may ask...

Page 15: ...tbspin bat by typing initbspin The PC display will be shown as below 3 After that turn off DC power supply 9V to the jig unplug AC adaptor and remove pins on PCB Then close the cabinet The base pin returns to the default 0000 and you can register a handset to the base using the base PIN 0000 6 4 Reset 6 4 1 Base Unit If the base unit is reset the Caller ID list will clear To exit the operation pre...

Page 16: ... Handsets All Clear Each Handset can be set indivisually Call Restriction Numbers All Clear Up to 10 numbers up to 8 digits 4 Digit Base Unit PIN 0000 ARS Setting OFF ON OFF Carrier Code All Clear Area Code All Clear Relation of Area Code All Area Code to Carrier Code 1 1 to 5 6 4 2 Handset You can reset all of the handset settings to their initial settings To exit the operation press any time 1 T...

Page 17: ...gth of the Call Talk Time Phone No Display Language German 10 languages Call BAR OFF OFF ON Direct Call Mode OFF OFF ON Direct Call Number Clear Up to 24 digits 4 Digit Handset PIN 0000 Auto Talk OFF OFF ON Base Unit Access Automatic Base Unit Access Auto Specific Base Unit No Redial Memory All Clear Handset Receiver Volume Medium Low Medium High 6 5 Key Lock You can lock the handset dialling butt...

Page 18: ...a long distance service For example when 9 line access number is dialled followed by a pause to access an outside line through a PBX Entering a pause prevents misdialling when you redial or dial a stored number Pressing PAUSE once creates one pause To extend the pause requirement time press PAUSE accordingly 1 is displayed Refer to Handset Display on the LCD 6 8 Call Restriction You can restrict s...

Page 19: ...elected 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 6 10 Call BAR On Off Call Prohibition On Off You cannot make any dialling if call BAR is on 15 ...

Page 20: ...u can select one of 10 languages If you set a language you cannot read reset the handset to its initial settings Press MENU DOWN RIGHT UP RIGHT 4 digit Handset PIN UP OK All handset setting will be reset to their initial settings however the Phonebook data will be saved 6 12 Select Flash Earth Mode An earth relay can be installed as an option depending on your PBX requirements Please consult our 1...

Page 21: ...which selects the least expensive carrier network service available when making long distance calls When area code s have been related to carrier codes you will need only dial the area code the lower costing carrier network will automatically be dialled Please contact your telephone company regarding the carrier telephone charges 6 13 1 Storing the Carrier Code s Firstly you must subscribe to a se...

Page 22: ...1 The factory preset is 0000 2 If you need more area code storing repeat the steps from 6 6 13 3 Relate the Area Code s to the Carrier Code s After storing carrier code s and area code s you must relate the stored area code s to your chosen lower costing carrier code It is only necessary to relate area codes to carrier codes if more than one carrier code has been stored If only one carrier code ha...

Page 23: ... Selection On Off To exit the operation press any time 1 The factory preset is 0000 6 14 Summary of Programmable Functions You can select and execute the following functions by pressing direct command as follows without programming These operations need to be done with the Handset near the base unit Press Press or until the arrow points to then press is displayed 1 19 ...

Page 24: ...ase 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 20 ...

Page 25: ...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 Turn the power OFF then ON Handset Disconnect then connect the AC adaptor Base Unit 21 ...

Page 26: ...n 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 Digit is cleared to the left then enter numbers 22 ...

Page 27: ...After a mains power failure the clock needs to be reset Ensure that icon is not flashing To exit the operation press any time 1 For example to set 7 15 enter 0715 2 For example to set the 16th of February 2003 enter 160203 8 5 Phonebook You can store up to 20 caller information in the phonebook If you received a call from the same phone number you stored with a name in the phonebook the display wi...

Page 28: ...n 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 2 To continue storing another caller information repeat the steps from 3 24 ...

Page 29: ...e left of the flashing digit If you need to clear or add more than one digit repeat the steps from 4 4 Characters are added to the left of the flashing character If you need to clear or add more than one character repeat the steps from 7 5 To continue clearing another caller information repeat the steps from 2 8 5 2 Storing the Phone Number into the Phonebook When Pre dialling 25 ...

Page 30: ...tion press any time 1 If there is no item stored in the redial caller list the display shows 2 If you need correction press RIGHT or LEFT to move cursor then clear a character by pressing CLEAR and or enter digits Digits are cleared or added to the left of the flashing digit 8 5 4 Hot Key Speed Dial You can assign the dialling buttons 1 through 9 as hot keys You can choose 9 phone numbers from the...

Page 31: ...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 DISASSEMBLY INSTRUCTIONS 9 1 Base Unit 27 ...

Page 32: ...Shown in Fig To Remove Remove 1 Lower Cabinet Screws 2 6 12 A 2 2 Main P C Board Main P C Board 9 2 Handset 28 ...

Page 33: ...Shown in Fig To Remove Remove 3 Rear Cabinet Screws 2 10 B 2 4 Rear Cabinet Follow the procedure 5 Main P C Board Screw 2 8 C 1 Screws 2 8 D 2 Main P C Board 9 3 Charger Unit 29 ...

Page 34: ...hown in Fig To Remove Remove 6 Lower Cabinet Screws 2 6 14 E 2 7 Main P C Board Main P C Board 10 ASSEMBLY INSTRUCTIONS 10 1 Warning When Constructing the Base Unit 11 TROUBLESHOOTING GUIDE Flow Chart 30 ...

Page 35: ...ption 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 31 ...

Page 36: ...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 32 ...

Page 37: ...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 33 ...

Page 38: ...Cross Reference Power Supply Circuit Adjustment Base Unit 11 3 2 Handset 34 ...

Page 39: ...stment 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 35 ...

Page 40: ...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 36 ...

Page 41: ... 4ppm Hewlett Packard 53131A is recommended DC power it must be able to output at least 1A current under 9V Digital multi meter DMM it must be able to measure voltage and current Oscilloscope 12 1 2 JIGs and PC EEPROM serial JIGs 1 I2C PCB PQZZTCD705BX 2 RS232C cable PQZZ1CD705BX 3 Clip cable PQZZ2CD705BX 4 DC cable PQZZ3CD705BX PC which runs in DOS mode Batch file for setting PQZZTCD420E 12 2 PC ...

Page 42: ... setfreq nn nn hookoff off hook mode on Base Type hookoff hookon on hook mode on Base Type hookon Getchk Read checksum Type getchk Wreeprom write eeprom Type wreeprom 01 23 45 01 23 is address and 45 is data to be written InitBsPIN bat Initial Base PIN to 0000 Type initBsPIN 12 3 TAM Voice Prompt Download 1 Connect the parallel cable from the VOICE PROMPT DOWN LOADER to TP101 TP102 TP103 TP104 and...

Page 43: ...PCB PQZZTCD705BX 2 RS232C cable PQZZ1CD705BX 3 Clip cable PQZZ2CD705BX 4 DC cable PQZZ3CD705BX PC which runs in DOS mode Batch file for PC setting PQZZTCD420E 13 2 PC Setting 13 2 1 Connections 13 2 2 PC Setting 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 connecti...

Page 44: ...base unit does not respond to a call from handset Make adjustments in item A F I M The base unit does not transmit or the transmit frequency is off Make adjustments in item A E H J L The transmit frequency is off Make confirmation in item A E H J L The transmit power output is low and the operating distance between base unit and handset is less than normal Make confirmation in item H K The recepti...

Page 45: ...4V IC8 C53 C55 C56 R78 R77 R74 D9 Q12 D BBIC Confirmation 1 BBIC Confirmation Execute the command getchk 2 Confirm the returned checksum value Connection of checksum value and program number is shown below IC8 C53 C55 C56 R78 E BBIC Clock Adjustment TP15 1 Execute the command deactmac 2 Execute the command conttx 3 Input Command rdeeprom_00_00_02 then you can confirm the current value 4 Adjust the...

Page 46: ...Socket to DTMF tester 2 Execute the command hookoff and dtmf_up 3 Confirm that the high frequency 1477 06Hz group is 6 5dBm 9 5dBm 4 Execute the command dtmf_lo 5 Confirm that the low frequency 852 05Hz group is 9 0dBm 12 0dBm IC8 R55 R30 C88 R26 R25 R24 R27 R20 H Transmitted Power Confirmation Remove the Antenna before starting step from 1 to 4 1 Configure the DECT tester CMD60 as follows Setting...

Page 47: ...kHz div using data type Fig31 5 Adjust the B Field Modulation if required Execute the command readmod and wrtmod xx where xx is the value IC6 IC4 C57 C61 C77 C78 C68 C69 R80 C63 R83 R84 L3 C79 C C66 D10 J Frequency Offset Confirmation Follow steps 1 to 3 of H above 4 Confirm that the frequency offset is 40kHz IC6 IC4 C57 C61 C77 C78 C68 C69 R80 C63 R83 R84 L3 C79 C C66 D10 43 ...

Page 48: ... of H above 4 Set DECT tester power to 88dBm 5 Confirm that the BER is 1000ppm IC6 IC4 C57 C61 C77 C78 C68 C69 R80 C63 R83 R84 L3 C79 C C66 D10 L Timing Confirmation Follow steps 1 to 3 of H above 4 Confirm that the Timing accuracy is 5 0ppm IC6 IC4 C57 C61 C77 C78 C68 C69 R80 C63 R83 R84 L3 C79 C C66 D10 44 ...

Page 49: ...k Replac Parts M RSSI Level Confirmation Follow steps 1 to 3 of H above 4 Set DECT tester power to 88dBm 5 Execute the command readrssi 6 Confirm 29 returned value 3E hex IC6 IC4 C57 C61 C77 C78 C68 C69 R80 C63 R83 R84 L3 C79 C C66 D10 45 ...

Page 50: ... and line current to 40mA 8 Connect DECT tester to Tel simulator 9 Input audio signal 200mVrms 1kHz tone to Tel simulator DECT tester setting Scramble On AF Gen to ADPCM Off AF Meter Input ADPCM AF Gen Frequency 1000Hz AF Gen Level 200mVrms 10 Confirm hearing tone 360mVrms 60mVrms 11 Adjust audio level if required Make sure current value using getmicgain And then execute the command setmicgain xx ...

Page 51: ...ms 9 Confirm hearing tone 300mVrms 50mVrms 10 Adjust audio level if required Make sure current value using getspkrgain And then execute the command setspkrgain xx where xx is the value 11 Confirm that the audio distortion at 600R of Tel simulator is 5 IC6 IC4 C57 C61 C77 C78 C68 C69 R80 C63 R83 R84 L3 C79 C C66 D10 R20 C14 R21 R22 R85 C15 R51 C92 C32 Q2 R13 Q4 R15 D6 C7 JM P Charging Check 1 Conne...

Page 52: ...rge 2 Measure and confirm voltage across the regigster is 2 7V 0 2V D1 R1 Note After the measuring sock up the solder of TP The connection of adjustment equipment are as shown in Adjustment Standard Charger Unit 14 4 Adjustment Standard Charger Unit When connecting the Simulator Equipments for checking please refer to below 14 4 1 Flow Solder Side View Note A is refered to ADJUSTMENTS BASE UNIT AN...

Page 53: ...on in item I L The reception sensitivity of base unit is low with noise Make confirmation in item L Does not link between base unit and handset Make confirmation in item A C H N The reception level is high or low Make adjustments in item O The transmit level is high or low Make adjustments in item P Refer to Adjustment 15 1 Adjustment Please follow the items below when BBIC or EEPROM are replaced ...

Page 54: ...d program number is shown below IC1 X1 C C17 D Charge Control Check Charge Current Monitor Confirmation 1 Apply 6V between TP5 and TP6 with current limit of PSU to 200mA 2 Confirm that the charge current is ON OFF 3 SW to decrease current limit of PSU to 100mA 4 Confirm that the charge current is stable IC1 D4 L5 Q2 Q R6 D2 R C26 F1 R R4 C3 E Charge Detection OFF Confirmation 1 Stop supplying 6V t...

Page 55: ...00 xx where xx is the value so that the reading of the frequency counter is 10 368000MHz 3Hz IC1 L3 C IC3 X1 C C17 I Transmitted Power Confirmation TP15 Remove the Antenna before starting step from 1 to 5 1 Configure the DECT tester CMD60 as follows Setting Test mode PP RFPI 0102030405 Traffic Channel 5 Traffic Slot 4 Mode Loopback 2 Execute the command testmode 3 Execute the command regcmd60 4 In...

Page 56: ...C3 C C66 C60 C57 C55 C62 R23 C63 C64 R18 L Sensitivity Receiver Confirmation Follow steps 1 to 4 of I above 5 Set DECT tester power to 88dBm 6 Confirm that the BER is 1000ppm IC1 IC3 C C66 C60 C57 C55 C62 R23 C63 C64 R18 M Timing Confirmation Follow steps 1 to 4 of I above 5 Confirm that the Timing accuracy is 10ppm IC1 IC3 C C66 C60 C57 C55 C62 R23 C63 C64 R18 52 ...

Page 57: ...Voltm AF Gen Frequency 1000Hz AF Gen Level 50mVrms 8 Confirm hearing tone 300mV 250mV Just check Audio path 9 Confirm that the audio distortion with DECT tester is 5 IC1 C12 R17 R20 C11 D7 IC3 C54 C60 L3 C C55 C56 R23 R24 C64 C65 P Transmit Audio Check and Confirmation TP15 1 Configure the DECT tester CMD60 as follows Setting Test mode FP Mode Normal RFPI 0102030405 2 Execute the command testmode ...

Page 58: ...Base Unit I Data type Fig31 Frequency Offset 50 kHz 50 kHz Adjustment Base Unit J RX Sensitivity 1000 ppm Adjustment Base Unit K Timing Accuracy 5 0 ppm Adjustment Base Unit L RSSI Level 0x34 hex A hex Adjustment Base Unit M Refer to Adjustment Base Unit 16 2 Handset Item Value Refer to Remarks TX Power More than 20 dBm 25 dBm Adjustment Base Unit I Modulation 340 kHz div 402 kHz div Adjustment Ba...

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 55 ...

Page 60: ...18 FREQUENCY TABLE MHz 56 ...

Page 61: ...GRAM BASE UNIT 20 CIRCUIT OPERATION BASE UNIT 20 1 Outline Base Unit consists of the following ICs as shown in BLOCK DIAGRAM BASE UNIT DECT BBIC Base Band IC IC6 Handling all the audio signal and data processing needed in a DECT base unit Controlling the DECT specific physical layer and radio section Burst M odule Controller section ADPCM codec filter for speech encoding and speech decoding DSP se...

Page 62: ...put Crystal Circuit 10 368MHz Charge Circuit Telephone Line Interface Circuit 20 2 Power Supply Circuit The power is supplied to the DECT BBIC RF Module EEPROM Relay Coil LED and Charge Contact from AC Adaptor 6V as shown in Fig 101 The power supply is as follows DECT BBIC IC8 J1 6V D4 IC2 IC3 IC8 IC6 IC7 RF Module IC9 J1 6V D4 IC2 IC9 EEPROM IC4 J1 6V D4 IC2 IC3 IC4 LED LED1 J1 6V D4 IC2 R57 LED1...

Page 63: ... 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 A C25 R40 R45 IC5 C28 R47 C29 R49 IC8 136 CLIP B C24 R39 R44 IC5 C28 R47 C29 R49 IC8 136 CLIP A C2 IC1 IC8 81 BELL B D2 D3 R1 IC1 IC8 81 BELlL ON OFF hook circuit In the standby mode Q2 is open and connected as to cut the DC loop ...

Page 64: ...er fields to produce the GAP Generic Access Profile standard DECT frame assigning to a time slot and channel etc In IC3 the carrier frequency is changing and frequency modulated RF signal is generated and amplified and radiated from antenna Handset detects the voice signal or data signal in the circuit same as the following explanation of Receiver Block 20 4 2 Receiver Block The signal of 1 152 MH...

Page 65: ...s follows DC 5 5V 6V D4 R43 R44 CHARGE Base CHARGE Handset L4 Q2 F1 BATTERY Battery BATTERY R21 GND L5 CHARGE Handset CHARGE Base GND DC GND When charging the handset on the Charger Unit the charge current is as follows DC 5 5V 6V D1 R1 R2 CHARGE Charger Unit CHARGE Handset F1 BATTERY Battery BATTERY R21 GND CHARGE Handset CHARGE Charger Unit GND DC GND In this way the BBIC on Handset detects the ...

Page 66: ...arts 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 24 SIGNAL ROUTE 62 ...

Page 67: ...25 CPU DATA BASE UNIT 25 1 IC8 BBIC 63 ...

Page 68: ...F 17 SYCL D0 Active Active 18 SYEN DO Normal Latch 19 SYDA DI Active Active 20 RXDA A Active Active 21 RXDB A 22 ANT1 DO ANT1 ON ANT1 OFF 23 VDD 24 VSS 25 ANT2 DO ANT2 ON ANT2 OFF 26 I2CLK DO Active Active 27 I2DAT DI O Data Data 28 VSS 29 CSROQ DO Read IC7 for Flash Memory 30 BSCL0 DO for Flash Memory 31 BSCL1 DO for Flash Memory 32 A0 DO for Flash Memory 33 A1 DO for Flash Memory 34 VDD 35 VSS 3...

Page 69: ...Memory 65 ...

Page 70: ...Flash Memory 49 A13 DO for Flash Memory 50 A14 DO for Flash Memory 51 A15 DO for Flash Memory 52 D0 DO I for Flash Memory 53 D1 DO I for Flash Memory 54 D2 DO I for Flash Memory 55 VDD 56 VSS 57 D3 DO I for Flash Memory 58 D4 DO I for Flash Memory 59 D5 DO I for Flash Memory 60 D6 DO I for Flash Memory 61 D7 DI O for Flash Memory 62 P0 7 DO 63 P0 6 DO Make Break 64 NO USE DO 65 NO USE DO 66 VDD 67...

Page 71: ...SE DO 81 TONE DI Ring Det 82 NO USE DO 83 NO USE DO 84 NO USE DO 85 NO USE DO 86 NO USE DO 87 NO USE DO 88 VDD 89 VSS 90 NO USE DO 91 NO USE DO 92 NO USE DO 93 NO USE DO 94 NO USE DO 95 MA5 DO I for Voice Down Load 96 NO USE DO 97 MA3 DO I for Voice Down Load 98 VDD 99 VSS 100 MA2 DO I for Voice Down Load 101 MA1 DO I for Voice Down Load 102 MA0 DO I for Voice Down Load 103 FRDY DO for Flash Memor...

Page 72: ...16 VSSA 117 VDDA 118 NO USE A 119 NO USE AI 120 NO USE AI 121 NO USE A 122 NO USE A 123 SON A 124 NO USE A 125 NO USE A 126 HOP A 127 HOPI A 128 NO USE A 129 REFVH A 130 BREF A 131 VSSA 132 VDDA 133 MIP A 134 MFBN A 135 MFBP A 136 MIN A 137 ADREFP A 138 ADREFN A 139 RSSI A 140 AD3 A 141 AD4 A 142 MPCINP A 143 RESETQ A Normal Reset 144 VDD Note I_PU Internal Pull Up I_PD Internal Pull Down 68 ...

Page 73: ...TA D I Active 13 SYEN D O Active 14 SYDA D O Active 15 SYCL D O Active 16 TX_DATA A O Active 17 KEY_IN D I No Key 18 KEY_IN D I No Key 19 KEY_IN D I No Key 20 KEY_IN D I No Key 21 KEY_IN D I No Key 22 NO USE D O 23 Reference clock D O Active 24 VDD 25 VSS 26 POWER_SW A I No Key 27 CHARGE_DET A I Charge 28 DCDCDRV D O Active 29 DCDCCMR A I 30 RESET A I Normal 31 VSSO 32 LOAD A I 33 XTAL A I 34 VDDP...

Page 74: ... Active 60 KEY_STRB D O Active 61 LCD_SEGMENT D O Active 62 LCD_SEGMENT D O Active 63 VDD 64 VSS 65 VDD for EEPROM D O 66 I2DAT D I O Active 67 I2CLK D I O Active 68 MODE D I 69 R2 D I 70 NO USE D O 71 VBACK P0 7 D I 72 LCD_SEGMENT D O Active 73 LCD_SEGMENT D O Active 74 LCD_SEGMENT D O Active 75 LCD_SEGMENT D O Active 76 LCD_SEGMENT D O Active 77 VDDLI 78 LCD_SEGMENT D O Active 79 LCD_SEGMENT D O...

Page 75: ... 015F 27 2 Introduction The base unit uses a 32K bit serial EEPROM IC1 for storing volatile parameters All parameters are set up before the base leaves the factory Some of these are vital for the operation of the hardware so a set of default parameters is programmed before the actual hardware fine tuning can be initiated This document lists all default settings with a short description In the tabl...

Page 76: ...led 003A 003E FF FF IPUI_3 ID for H S 3 x D Ipui for handset 3 If set to FF FF 5bytes the handset is not enrolled 003F 0043 FF FF IPUI_4 ID for H S 4 x D Ipui for handset 4 If set to FF FF 5bytes the handset is not enrolled 0044 0048 FF FF IPUI_5 ID for H S 5 x D Ipui for handset 5 If set to FF FF 5bytes the handset is not enrolled 0049 004D FF FF IPUI_6 ID for H S 6 x D Ipui for handset 6 If set ...

Page 77: ... KAMMA4 are 20h and 21h Bit 7 5 Mode 001 group 4 Not used 3 0 Id 001 id of first group 27 3 3 Flash Time setting Address Default Name Country Setting Type Description 0F0B 08 CalibBreakTime 0 x D Calibrated loop break time for short break Unit 10 ms defaultst to 80 ms 0F0C 14 CalibBreakTime 1 x D Calibrated loop break time for short break Unit 10 ms defaultst to 200 ms 0F0D 46 CalibBreakTime 2 x D...

Page 78: ... set configuration Bit 0 Etsi 1 enable 0 disable 1 ForwardNumber 1 enable 0 disa 2 Danish 1 enable 0 disable 3 Dutch 1 enable 0 disable 4 Canadian 1 enable 0 disable 5 Swedish 1 enable 0 disable 6 UserDefined 1 enable 0 disable 7 KPN vmwi 1 enable 0 disable 8 ProtocolPriority If 2 mutual exclusive parameters occurs the 1st in the protocol message has priority 9 UseCallType Verify the Call Type par...

Page 79: ...yRec 1 2WayRecMsg 2 New Info 0 OLD 1 NEW 3 OGM Info Not used 4 Reserve 5 2WayInfo 0 Not 2WayRec 1 2WayRecMsg 6 ARSMultipleCarrierMenuEnabled enabled 7 OGM Info Not used 0F61 14 TamPrgRings x A TAM Current Setting data Bit 0 Answer ON OFF 0 OFF 1 ON 1 ICM Record Time Mode1 0 OFF 1 Greeting Only 2 ICM Record Time Mode2 0 OFF 1 Unlimited Mode1 0 Mode2 0 ICM Record Time 1min 3 CPC time selection 0 tim...

Page 80: ...nu 5 LanguageInfo 0 Single Language 1 Dual Languages 6 Reserve 7 Reserve 0F66 08 DetData x D Detection data Bit 0 Selection CPC A B 0 OFF A fixed 1 ON Select 1 Reserve 2 Detect 1st Short Bell 300ms for count 3 Cyclic Detection of VOX 0 OFF 1 ON Detect 4 Detection of DSC 0 OFF 1 ON Dete 5 Reserve 6 Reserve 7 Reserve 0F67 06 OptionData 26 D Each country data Bit 0 2 Way Beep ON OFF 0 OFF 1 ON 1 2 Wa...

Page 81: ...nfig1 x D BsUiTask configuration MSB Bits 1 enable 0 disable 0 AmPmClockSettingEnabled enable 1 ClipDetectionSettingEnabled disab 2 AkzMenuEnabled disabled 3 HakzMenuEnabled disabled 4 RussianClipSttingEnabled disabled 5 SmscSendNumberSettingEnabled disabled 6 7 Unused 0F6F F7 Config2 D7 D BsUiTask configuration LSB Bits 1 enable 0 disable 0 FlashTime1Enabled enabled 1 FlashTime2Enabled enabled 2 ...

Page 82: ...0 to 01 contains the value 00 simply means that the value 00 is repeated in all addresses in the range Type Name Description D default The EEPROM location is preset to the Default value by the eeprom default loader A adjust The EEPROM location is set during the production test and should not be overwritten The value is set by the eeprom default loader only if the location contains 0xFF i e it has ...

Page 83: ...0147 0156 UAK_2 UAK for registration 2 0160 0164 RFPI_3 Base 3 RFPI for registration 3 0165 SerClass_3 Service class for registration 3 0166 LAL_3 Location area level for registration 3 0167 IPUI_LEN_3 IPUI length for registration 3 0168 0174 IPUI_3 IPUI for registration 3 0175 ZAP_3 ZAP for registration 3 0176 STATUS_3 status for registration 3 0177 0186 UAK_3 UAK for registration 3 0190 0194 RFP...

Page 84: ...nDigitsToMatch x D Valid values 01 FF Must be lower tha MaxDigitsToMatch If all digits of one of the numbers match completely with at least this number of digits we h a match Or if they match completely with less digits we also have match 28 3 3 Battery Parameters Address Default Name Type Description 0F04 9A LowVoltage A Voltage on which to start battery low indication The voltage has to be measu...

Page 85: ... Country Setting Type Description 0F53 FF Menu Config x D bit 0 Registration menu on off 1 0 bit 1 Select base menu on off 1 0 bit 2 Internal ringer menu on off 1 0 bit 3 Page ringer menu on off 1 0 bit 4 Standby mode menu on off 1 0 bit 5 Battery select menu on off 1 0 bit 6 Call wating menu on off 1 0 bit 7 Clip list on off 1 0 0F54 01 RecVolStoreEnabled x D 00 Reciever volume will be reset to d...

Page 86: ...two diagonally opposite pins in the correct positions on the PCB Be certain each pin is located over the correct pad on the PCB 2 Apply flux to all of the pins on the IC 3 Being careful to not unsolder the tack points slide the soldering iron along the tips of the pins while feeding enough solder to the tip so that it flows under the pins as they are heated 29 3 Modification Procedure of Bridge 82...

Page 87: ...l 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 83 ...

Page 88: ...84 ...

Page 89: ...31 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 32 CABINET AND ELECTRICAL PARTS LOCATION CHARGER UNIT 85 ...

Page 90: ...86 ...

Page 91: ...33 ACCESSORIES AND PACKING MATERIALS 33 1 KX TCD420GS 33 2 KX A142EXS 87 ...

Page 92: ...34 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 34 1 Base Unit 88 ...

Page 93: ...34 2 Handset 34 3 Charger Unit 35 REPLACEMENT PARTS LIST Note 89 ...

Page 94: ...e 2 Important safety notice Components identified by the mark indicates special characteristics important for safety When replacing any of these components only use specified manufacture s parts 3 The S mark means the part is one of some identical parts For that reason it may be different from the installed part 4 ISO code Example ABS 94HB of the remarks column shows quality of the material and a ...

Page 95: ...7 PQWI1D420GH IC IC8 C1CB00001558 IC TRANSISTORS Q2 2SA1625 TRANSISTOR SI S Q4 PQVTBF822T7 TRANSISTOR SI Q7 B1ABCE000009 TRANSISTOR SI Q8 B1ABCE000009 TRANSISTOR SI Q9 2SD1994A TRANSISTOR SI Q11 B1ABCE000009 TRANSISTOR SI Q12 B1ABCE000009 TRANSISTOR SI Q13 PQVTDTC143K TRANSISTOR SI DIODES D2 PQVDBZV55C02 DIODE SI D3 PQVDBZV55C02 DIODE SI D4 B0JAME000085 DIODE SI D5 MA2J11100L DIODE SI D6 PQVDS1ZB6...

Page 96: ...RJ3GEYJ473 47K R42 ERJ3GEYJ124 120K R43 ERJ3GEYJ473 47K R44 ERJ3GEYJ101 100 R45 ERJ3GEYJ101 100 R46 ERJ3GEYJ124 120K R47 ERJ3GEYJ823 82K R48 ERJ3GEYJ102 1K R49 ERJ3GEYJ822 8 2K R50 ERJ3GEYJ823 82K R51 ERJ3GEYJ123 12K R52 ERJ3GEYJ823 82K R53 ERJ3GEYJ683 68K R54 ERJ3GEYJ104 100K R55 ERJ3GEYJ101 100 R56 ERJ3GEYJ103 10K R57 ERJ3GEYJ151 150 R59 ERJ1WYJ330 33 R60 ERJ1WYJ330 33 R61 ERJ3GEYJ101 100 R62 ER...

Page 97: ...93 ...

Page 98: ...PQCUV1A105KB 1 C19 PQCUV1C104KB 0 1 C21 ECEA1HKS100 10 S C22 PQCUV1H154KR 0 15 C24 ECKD2H102KB2 0 001 S C25 ECKD2H102KB2 0 001 S C26 ECUV1C104KBV 0 1 C27 ECJ1VC1H151J 150P C28 ECUV1C104KBV 0 1 C29 ECUV1C104KBV 0 1 C30 ECUV1C104KBV 0 1 C31 ECUV1H100DCV 10P C32 ECUV1H100DCV 10P C33 PQCUV1H100DC 10P C34 ECUV1H100DCV 10P C35 ECUV1H100DCV 10P C36 ECEA1CK101 100 S C37 ECEA0JKA331 330 C39 ECEA0JKA331 330...

Page 99: ...H101JCV 100P C72 ECUV1H102KBV 0 001 C75 ECUV1H100DCV 10P C76 ECUV1H100DCV 10P C77 PQCUV1H020CC 2P C78 ECUV1H2R0CCV 2 C79 ECUV1H100DCV 10P C80 ECUV1H2R0CCV 2 C88 ECUV1H100DCV 10P C89 ECUV1H220JCV 22P C90 PQCUV1C474KB 0 47 C91 PQCUV1C104KB 0 1 C92 ECUV1H100DCV 10P C96 ECUV1H100DCV 10P R22 ECUV1H100DCV 10P R69 ECUV1H220JCV 22P OTHERS IC9 J3FKK0000003 RF UNIT S1 K0H1BB000018 SPECIAL SWITCH TACTILE SA1...

Page 100: ...VER SHEET 119 PQHS10561Y SPACER BATTERY COVER 120 PQKK10134Z4 LID BATTERY ABS HB 35 2 2 Main P C Board Parts Ref No Part No Part Name Description Remarks PCB100 PQWP1D410GR MAIN P C BOARD ASS Y RTL ICs IC1 C2HBAK000005 IC IC2 PQWI1D410GR IC S TRANSISTORS Q1 PQVTFDN335N TRANSISTOR SI S Q2 B1ADGE000004 TRANSISTOR SI Q3 UN5216 TRANSISTOR SI DIODES D1 B0JCME000035 DIODE SI D3 MA2Z74800L DIODE SI D4 MA...

Page 101: ...H180JCV 18P C18 ECUV1C104KBV 0 1 C20 ECUV1C104KBV 0 1 C21 ECUV1C104KBV 0 1 C22 ECUV1C104KBV 0 1 C23 ECUV1C104KBV 0 1 C24 ECUV1C104KBV 0 1 C26 ECUV1C104KBV 0 1 C27 ECUV1C104KBV 0 1 C28 ECUV1C104KBV 0 1 C29 ECUV1C104KBV 0 1 C30 ECUV1C104KBV 0 1 C31 ECUV1H100DCV 10P C33 ECUV1A225KB 2 2 C54 ECUV1H100DCV 10P C55 ECUV1H020CCV 2P C56 ECUV1H020CCV 2P C57 ECUV1H330JCV 33P C60 ECUV1A475KB 4 7 C62 ECUV1A105K...

Page 102: ...Z2B000040 JACK S RESISTORS R1 ERJ1WYJ220 22 R2 ERJ1WYJ270 27 35 4 Accessories and Packing Materials 35 4 1 KX TC420GS Ref No Part No Part Name Description Remarks A1 PQLV19CEZ AC ADAPTOR A2 PQJA10139Z CORD TELEPHONE A3 PQQX13540Z INSTRUCTION BOOK A4 PQQW12792Z QUICK GUIDE A5 PQQW12846W LEAFLET RECHARGE P1 PQPP10100Z PROTECTION COVER for Base Unit P2 PQPP10084Z PROTECTION COVER for Handset P3 PQPK1...

Page 103: ...UNIT and CHECK PROCEDURE HANDSET 35 6 Memo 36 SCHEMATIC DIAGRAM BASE UNIT 37 SCHEMATIC DIAGRAM HANDSET 38 SCHEMATIC DIAGRAM CHARGER UNIT 39 CIRCUIT BOARD BASE UNIT 39 1 Component View 39 2 Flow Solder Side View 40 CIRCUIT BOARD HANDSET 40 1 Component View 40 2 Flow Solder Side View 41 CIRCUIT BOARD CHARGER UNIT 41 1 Component View 41 2 Flow Solder Side View M KXTCD420GS KXA142EXS 99 ...

Page 104: ...PbF D1 J1 CIRCUIT BOARD CHARGER UNIT Component View ...

Page 105: ...KX A142EXS CIRCUIT BOARD HANDSET Flow Solder Side View 1 PROG PbF BOOK UP POWER CAN DOWN RIGHT REDIAL LEFT 1 2 3 6 5 7 0 R 4 9 8 INT MIC TALK 36 CN2 ...

Page 106: ...2 100 80 30 F1 50 5 8 4 1 1 R18 C27 TP18 C20 C23 C18 L5 L4 R21 R6 C24 X1 Q1 C31 TP19 TP13 TP17 TP14 TP16 TP12 TP3 TP4 TP10 BAT GND SCL SDA C57 C64 C56 C55 11 18 1 28 27 26 25 24 23 22 21 20 19 18 28 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 34 33 32 31 30 29 1 IC3 C60 TP2 SP BBIC 41 TP1 SP BBIC 42 TP14 4V RF Clock BBIC 23 10 368 MHz VDD 2 65V CDT BBIC 27 TP12 CN3 TP3 GND TP4 KX A142EXS CIRCUIT BOARD...

Page 107: ...T Flow Solder Side View TP13 TP15 TP8 TP7 TP11 TP106 TP9 TP1 2 4 1 5 6 TP4 TP2 TP3 TP10 TP6 TP5 B0 B4 B8 B1 GND MODE SCL SDA VDD J105 PbF J102 J104 J103 J101 B2 CHARGE CHARGE IC3 Output 2 8V CHARGE CHARGE IC2 Input 5 5V IC2 Output 4 0V RF Clock 10 368MHZ ...

Page 108: ...37 C67 C76 C69 C83 C85 C96 C32 C94 R50 Q8 Q12 Q9 B C E R41 R43 R47 R57 R80 R64 R62 R57 R61 R83 R84 D10 R79 L3 Q3 Q4 Q7 Q5 Q11 Q13 Q10 Q6 Q2 R1 R42 R44 R3 C1 C28 CS 14 1 1 1 1 4 5 8 16 17 32 28 15 INT SDX SDR SCLK C26 C91 C44 C63 C84 C64 C34 C61 C54 C55 R86 C58 R82 C39 C45 L2 36 35 C72 C71 C60 C68 C80 C 6 6 C 6 2 C73 C79 C82 C81 C65 C74 ANT C6 C8 C3 C4 C9 C41 73 72 C40 C10 C7 C12 C70 C14 C19 C18 C2...

Page 109: ...TP3 R2 27 TP4 D1 2 1 J1 pinL DC_PLUG 22 Charge_minus TP1 TP2 R1 Charge_plus SCHEMATIC DIAGRAM CHARGER UNIT ...

Page 110: ... C62 K1 0 C60 K4 7 R22 0 C63 D10P C64 K1 0 X1 TP13 C55 C2P C56 C2P C54 D10P TP17 TP16 C65 C2P C25 NC D5 NC C66 C2P TP15 IC3 5 RSSI 6 VCC_OC 7 GND 8 SYCL 9 SYDA 10 SYEN 11 GND 12 RXDSG 13 SYRI 14 GND 16 GND 17 GND 18 GND 19 GND 20 RXDA 21 GND 22 GND 23 GND 24 PAON 25 GND 26 GND 27 VCC_PA 28 GND 29 GND 30 GND 31 GND 32 GND 33 RF1 34 GND GND 1 GND 2 GND 3 TXDA 4 CN5 1 SP 2 SP D6 D7 TP19 R24 0 POWER S...

Page 111: ... 28 C2 K4 7 R4 10K C3 K0 1 S11 S7 S20 S5 S3 S18 S25 S23 S15 S16 S4 S22 S21 S8 S9 C18 K0 1 C20 K0 1 C21 K0 1 C22 K0 1 C23 K0 1 C27 K0 1 R11 0 R21 0 1 F1 S24 S19 S14 S2 S1 CN2 1 C5 2 C4 3 C3 4 C2 5 C1 6 C0 7 S29 8 S28 9 S27 10 S26 11 S25 12 S24 13 S23 14 S22 15 S21 16 S20 17 S19 18 S18 19 S17 20 S16 21 S15 22 S14 23 S13 24 S12 25 S11 26 S10 27 S9 28 S8 29 S7 30 S6 31 S5 32 S4 33 S3 34 S2 35 S1 36 S0...

Page 112: ... C62 K1 0 C60 K4 7 R22 0 C63 D10P C64 K1 0 X1 TP13 C55 C2P C56 C2P C54 D10P TP17 TP16 C65 C2P C25 NC D5 NC C66 C2P TP15 IC3 5 RSSI 6 VCC_OC 7 GND 8 SYCL 9 SYDA 10 SYEN 11 GND 12 RXDSG 13 SYRI 14 GND 16 GND 17 GND 18 GND 19 GND 20 RXDA 21 GND 22 GND 23 GND 24 PAON 25 GND 26 GND 27 VCC_PA 28 GND 29 GND 30 GND 31 GND 32 GND 33 RF1 34 GND GND 1 GND 2 GND 3 TXDA 4 CN5 1 SP 2 SP D6 D7 TP19 R24 0 POWER S...

Page 113: ...5 1 1K R72 1K R73 1K R71 100 R74 100K R54 100 R55 D10P C33 1K R77 10K R75 10K R76 2 8V K0 1 C48 68K R53 K0 033 C49 TP7 TP8 2 8V Q5 NC C12 NC NC C13 NC R18 NC R19 NC R16 R20 0 NC R17 Q7 BC847B 1K R37 10K R36 2 8V Q8 1K R38 C56 R78 150K TP105 TP104 TP103 TP102 TP101 C50 Z1 0 C51 Z1 0 C52 Z1 0 D9 1 3 2 2 8V K0 015 C46 4 0V NC R31 NC R32 NC R33 Q10 NC C60 J33P L2 4 7u IC9 5 RSSI 6 VCC_OC 7 GND 8 SYCL ...

Page 114: ... D4 NC C10 J1 1 DCplug 2 J100P C71 20V D14 K1000P C72 NC R3 NC R4 K0 01 C3 K0 01 C4 180K R6 R5 0 JMP9 N M C87 K0 1 C91 IC4 1 A0L 2 A1 3 A2 4 GND 5 SDA 6 SC 7 WP 8 VCC IC2 3 ADJ 2 VOUT 1 VIN 4 VOUT C1 1 5 6k 6 3V330 C39 TP106 RING OPTION4 Z1 0u C45 2 8V IC7 1 A11 2 A9 3 A8 4 A13 5 A14 6 A17 7 WE 8 VCC 9 A18 10 A16 11 A15 12 A12 13 A7 14 A6 15 A5 16 A4 17 A3 18 A2 19 A1 20 A0 21 D0 22 D1 23 D2 24 GN...

Page 115: ...5 1 1K R72 1K R73 1K R71 100 R74 100K R54 100 R55 D10P C33 1K R77 10K R75 10K R76 2 8V K0 1 C48 68K R53 K0 033 C49 TP7 TP8 2 8V Q5 NC C12 NC NC C13 NC R18 NC R19 NC R16 R20 0 NC R17 Q7 BC847B 1K R37 10K R36 2 8V Q8 1K R38 C56 R78 150K TP105 TP104 TP103 TP102 TP101 C50 Z1 0 C51 Z1 0 C52 Z1 0 D9 1 3 2 2 8V K0 015 C46 4 0V NC R31 NC R32 NC R33 Q10 NC C60 J33P L2 4 7u IC9 5 RSSI 6 VCC_OC 7 GND 8 SYCL ...

Page 116: ...dule ANT BATTERY TERMINAL TP3 TP4 CHARGE CIRCUIT Q2 CHARGE CHARGE DETECT SWITCHED SUPPLY Q1 CHARGE CONTACTS TP5 4 0V VDDBAT VDDLR SWITCH 31 XTAL 10 368 MHz KEYPAD COLUMNS ROWS LCD 14 Seg Display ON SWITCH 38 27 26 36 37 28 2 5 9 COM 0 5 segment 0 29 1 87 EARPIECE 42 41 45 17 21 53 55 59 60 34 Burst Encoding Burst Decoding TP6 D3 X1 90 100 72 76 78 84 61 62 56 58 KX A142EXS BLOCK DIAGRAM HANDSET ...

Page 117: ... SDA SCL SYRI RSSI SYEN RXDA TXDA J1 J2 IC8 IC9 4 0V Reg 2 65V Reg 4 0V 2 65V VUNREG 27 26 133 123 63 12 20 139 5 22 25 18 5 6 4 RF Module 20 5 10 33 7 5 XTAL 10 368 X1 MHz DTXAF 136 Bell Caller ID Interface ANT1 ANT2 to Tel_Line A B to AC Adaptor RING 81 Ring Det 76 Clip Der Flash IC7 D0 D7 A0 A17 PROM 30 ADDRES DATA CTRL 29 SCK 1 11 14 13 12 103 104 106 105 107 SI SO CS RD5 BUSY Serial Flash ROM...

Page 118: ... 100 80 30 F1 50 5 8 4 1 1 R18 C27 TP18 C20 C23 C18 L5 L4 R21 R6 C24 X1 Q1 C31 TP19 TP13 TP17 TP14 TP16 TP12 TP3 TP4 TP10 BAT GND SCL SDA C57 C64 C56 C55 11 18 1 28 IC3 C60 DECT tester CMD60 I J K L M N O P Frequency Counter H Digital Volt Meter A Digital Volt Meter B C E F H I O P DC 6V Oscilloscope Current Probe D E D D TP5 TP6 TP7 TP8 DC 2 20V 2 40V F G To PC JIG AF SG DECT TESTER CMD60 AF Volt...

Page 119: ...PbF R1 R2 TP4 TP1 TP2 TP3 Digital Volt Meter 12Ω 2W A ...

Page 120: ...TP10 TP6 TP5 B0 B4 B8 B1 GND MODE SCL SDA VDD J105 PbF J102 J104 J103 J101 B2 CHARGE CHARGE Digital Volt Meter A Digital Volt Meter B Frequency Counter E DTMF tester Tel Simulator F N O G Digital Volt Meter C P To PC JIG Digital Volt Meter D E F G H N O 12Ω 2W ...

Page 121: ... C90 R20 R13 R56 R65 C77 C43 C75 C78 C33 C36 C87 C86 C37 C67 C76 C69 C83 C85 C96 C32 C94 R50 Q8 Q12 Q9 B C E R41 R43 R47 R57 R80 R64 R62 R57 R61 R83 R84 D10 R79 L3 Q3 Q4 Q7 Q5 Q11 Q13 Q10 Q6 Q2 R1 R42 R44 R3 C1 C28 CS 14 1 1 1 1 4 5 8 16 17 32 1 11 28 15 INT SDX SDR SCLK C26 C91 C44 C63 C84 C64 C34 C61 C54 C55 R86 C58 R82 C39 C45 L2 36 35 C72 C71 C60 C68 C80 C 6 6 C 6 2 C73 C79 C82 C81 C65 C74 28 ...

Page 122: ...net 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 OK NG Rib ...

Page 123: ...Clip G N D S D A S C L Base PCB J105 J102 J104 J103 J103 B1 GNDMODE SCL SDA VDD B2 ...

Page 124: ...PbF D1 J1 Marked PbF R1 R2 TP4 TP1 TP2 TP3 Marked Component View Flow Solder Side View ...

Page 125: ...Marked 1 PROG PbF BOOK UP POWER CAN DOWN RIGHT REDIAL LEFT 1 2 3 6 5 7 0 R 4 9 8 INT MIC TALK 36 CN2 ...

Page 126: ...Marked PbF IC1 IC2 100 80 5 8 4 1 50 51 30 31 1 11 18 1 28 IC3 ...

Page 127: ...Marked TP13 TP15 TP8 TP7 TP11 TP106 TP9 TP1 2 4 1 5 6 TP4 TP2 TP3 TP10 TP6 TP5 B0 B4 B8 B1 GND MODE SCL SDA VDD J105 PbF J102 J104 J103 J101 B2 CHARGE CHARGE ...

Page 128: ...PbF IC7 IC8 IC9 144 109 108 1 1 16 17 32 1 11 36 35 28 18 73 72 Marked ...

Page 129: ...PbF R1 R2 TP4 TP1 TP2 TP3 CIRCUIT BOARD CHARGER UNIT Flow Solder Side View ...

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Panasonic KX-TCD420GS, Service Manual, Page: 106 / 129

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