Panasonic KX-A144 Series Service Manual Download

Page: 54 / 93

21 CIRCUIT OPERATION (BASE UNIT)

21.1. Outline

Base Unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.53).

DECT BBIC (Base Band IC): IC2

−

Handling all the audio, signal and data processing needed in a DECT base unit

−

Controlling the DECT specific physical layer and radio section (Burst Module Controller section)

−

ADPCM codec filter for speech encoding and speech decoding (DSP section)

−

Echo-cancellation and Echo-suppression (DSP section)

−

Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)

−

DTMF receiver (DSP section)

−

Clock Generation for RF Module

−

ADC, DAC, timer, and power control circuitry

−

All interfaces (ex: RF module, EEPROM, RINGER, Analog Front End, etc.)

RF Module: IC3

−

PLL Oscillator

−

Detector

−

Compress/Expander

−

First/Second Mixer

−

Amplifier for transmission and reception

EEPROM: IC1

−

Temporary operating parameters (for RF, etc.)

Additionally,

−

Power Supply Circuit (+4.0 V, +2.65 V output)

−

Crystal Circuit (10.368 MHz)

−

Charge Circuit

−

Telephone Line Interface Circuit

KX-TCD440HGS / KX-TCD440H GT / KX-A144EXS-1 / KX-A144EXS / KX-A144EXT-1 / KX-A144EXT

Summary of Contents for KX-A144 Series

Page 1: ...ed Unauthorized copying and distribution is a violation of law KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT Digital Cordless Phone New Silver Version Titanium Black Version for Hungary Telephone Equipment 11ORDER NO KM40406454C2 ...

Page 2: ...ISASSEMBLY INSTRUCTIONS 26 10 1 Base Unit 26 10 2 Handset 27 10 3 Charger Unit 28 11 ASSEMBLY INSTRUCTIONS 29 11 1 Warning When Constructing the Base Unit 29 11 2 Processing of Ringer Charge Terminal Lead 30 12 TROUBLESHOOTING GUIDE 31 12 1 Check Power 32 12 2 Check Battery Charge 33 12 3 Check Link 34 12 4 Check Handset Transmission 36 12 5 Check Handset Reception 36 12 6 Check Caller ID 36 12 7 ...

Page 3: ...ICAL PARTS LOCATION BASE UNIT 72 32 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 73 33 CABINET AND ELECTRICAL PARTS LOCATION CHARGER UNIT 74 34 ACCESSORIES AND PACKING MATERIALS 75 34 1 KX TCD440HGS HGT 75 34 2 KX A144EXS EXT 76 35 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 77 35 1 Base Unit 77 35 2 Handset 77 35 3 Charger Unit 77 36 REPLACEMENT PARTS LIST 78 36 1 Base Unit 78 36 2 Handset ...

Page 4: ...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 When applying PbF solder to double layered boards please check the component side for excess which ...

Page 5: ...P97 TP82 TP187 TP91 TP188 TP101 TP89 TP2 1 2 4 6 TP5 TP90 TP50 TP202 TP201 TP45 TP3 TP39 TP40 J101 J103 J104 J102 J105 2 65V SDA SCL GND VBACK CHARGE PbF CHARGE RINGER RINGER C99 Marked Flow Solder Side View Note The location of the PbF mark is subject to change without notice 5 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 6: ...107 LED108 SP_ LED104 LED106 LED105 LED102 LED103 Marked Flow Solder Side View Note The location of the PbF mark is subject to change without notice 1 2 3 Charger Unit PCB PbF D1 J1 Marked PbF R1 R2 TP4 TP1 TP2 TP3 Marked Component View Flow Solder Side View Note The location of the PbF mark is subject to change without notice 6 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A14...

Page 7: ...nd 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 recommended by the manufacturer Dispose of used batteries according to the manufacture s Instructions 4 SPECIFICATIONS 7 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144...

Page 8: ...handset and base unit with a soft dry cloth otherwise the batteries may not charge properly Clean if the unit is exposed to grease dust or high humidity If the handset is turned off it will be turned on automatically when it is placed on the base unit Note for Service The battery strength may not be indicated correctly if the battery is disconnected and connected again even after it is fully charg...

Page 9: ... you install non rechargeable batteries and start charging the batteries may leak electrolyte Do not mix old and new batteries Use only 2 nickel metal hydride Ni MH batteries or 2 nickel cadmium Ni Cd batteries Do not mix battery types Ensure that the correct battery type is selected 1 Press the notch on the cover firmly and slide it in the direction of the arrow 2 Remove the batteries positive te...

Page 10: ...6 LOCATION OF CONTROLS 6 1 Base Unit 6 2 Handset 10 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 11: ...ot use this product near water This product should be kept away from heat sources such as radiators cookers etc It should also not be placed in rooms where the temperature is less than 5 C or greater than 40 C The AC adaptor is used as the main disconnect device Ensure that the AC outlet is located installed near the unit and is easily accessible Location For maximum distance and noise free operat...

Page 12: ...emain connected at all times It is normal for the adaptor to feel warm during use Use only the AC adaptor PQLV200CEZ 7 2 Ringer Volume 7 2 1 Base Unit 7 2 2 Handset 12 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 13: ...lt your nearest Panasonic service centre 7 3 1 Base Unit For Service Hint If the current 4 digit PIN is forgotten press and you will be able to enter new PIN 7 3 2 Handset For Service Hint If the current 4 digit PIN is forgotten press and you will be able to enter new PIN 13 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 14: ...s Dialling mode Tone Tone Pulse Flash time 100 msec 600 100 msec Pause Length 3 seconds 3 seconds 5 seconds Call Restricted Handsets All Clear Each Handset can be set individually Call Restriction Numbers All Clear Up to 10 numbers up to 8 digits 4 Digit Base Unit PIN 0000 Caller ID All Clear Up to 50 different callers 7 4 2 Handset Note Phonebook entries will not be erased The battery type settin...

Page 15: ...e Hungarian 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 Redial Memory All Clear Up to 10 numbers up to 24 digits Handset Receiver Volume 2 1 to 3 Handset Speaker Volume 3 1 to 6 7 5 Key Lock The dial keys can be locked so that no calls can be made Only incoming calls will be accepted while key l...

Page 16: ... call will not be connected and the restricted number will flash on the display For example storing an area code will prevent a handset from dialling a long distance call 7 9 Cancelling a Restricted Number 7 10 Setting Call BAR This feature prohibits making outside calls When call bar is turned on only intercom calls and emergency calls can be made 16 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144...

Page 17: ...ailable Note If you select a language you cannot read reset the handset to its default settings Refer to Handset P 14 in Reset 7 12 Setting Dialling Mode tone pulse 7 13 Setting Flash Time 17 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 18: ...ew calls have been received the display will show the number of new calls The number of new calls will be cleared after viewing all caller information Example 4 new calls have been received Note When you receive a call from the same phone number you stored with a name in the phonebook the display will show the stored name If the unit is connected to a PBX system you may not receive the caller info...

Page 19: ...till have difficulties after following the instructions in this section disconnect the AC adaptor and turn off the handset then reconnect the AC adaptor and turn on the handset 19 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 20: ... Key Lock P 15 5 Setting Dialling Mode tone pulse P 17 6 Ringer Volume P 12 7 Turning the Power On Off P 21 8 Battery Installation P 8 9 Battery Charge P 8 10 Battery Replacement P 9 11 Cancelling a Base Unit P 25 12 Cancelling a Handset P 24 20 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 21: ...te Note If a power failure occurs set the time and date again 9 3 1 Making a Call Using the Redial List The last 10 phone numbers dialled are stored in the redial list 9 3 2 Redialling the Last Number Dialled 21 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 22: ...9 4 Phonebook 9 4 1 Storing Phone Numbers and Names Up to 20 phone numbers can be stored in the phonebook for quick access 22 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 23: ...the Phonebook 9 4 3 Storing a Number from the Redial List into the Phonebook 9 4 4 Hot Key Quick Dial Note The number erased from a hot key will not be erased from the phonebook 23 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 24: ...9 5 Registering a Handset to a Base Unit 9 5 1 Cancelling a Handset 24 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 25: ...a Base Unit Note To register the handset to another base unit or to the same base unit again see manual registration 9 6 Selecting a Base Unit 25 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 26: ...SSEMBLY INSTRUCTIONS 10 1 Base Unit Shown in Fig To Remove Remove 1 Lower Cabinet Screws 2 6 12 A 2 2 Main P C Board Main P C Board 26 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 27: ...ig 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 27 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 28: ... 3 Charger Unit Shown in Fig To Remove Remove 6 Lower Cabinet Screws 2 6 14 E 2 7 Main P C Board Tape and Solder Main P C Board 28 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 29: ...he 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 29 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 30: ...11 2 Processing of Ringer Charge Terminal Lead 30 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 31: ...2 Bell Reception P 37 Check Battery Charge P 33 Check Link P 34 Check Handset Transmission P 36 Check Handset Reception P 36 SIGNAL ROUTE P 60 12 TROUBLESHOOTING GUIDE 31 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 32: ...Reference Power Supply Circuit Reset Circuit P 58 Note BBIC is IC2 Note BBIC is IC1 12 1 Check Power Is the AC Adaptor inserted into AC outlet Check AC Adaptor s specification 12 1 2 Handset 32 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 33: ...wer P 32 Charge Circuit P 58 Cross Reference Power Supply Circuit P 59 Note BBIC is IC1 12 2 1 Base Unit Cross Reference Charge Circuit P 58 12 2 2 Handset 12 2 3 Charger Unit 33 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 34: ...12 3 Check Link Cross Reference Power Supply Circuit P 55 Adjustment Base Unit P 40 Note RF module is IC3 12 3 1 Base Unit 34 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 35: ...12 3 2 Handset Cross Reference Power Supply Circuit Reset Circuit P 58 Adjustment Handset P 47 Note RF module is IC3 35 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 36: ... ROUTE P 60 12 5 Check Handset Reception Cross Reference HOW TO CHECK THE HANDSET SPEAKER OR RECEIVER P 51 SIGNAL ROUTE P 60 12 6 Check Caller ID Cross Reference SIGNAL ROUTE P 60 36 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 37: ...eception Cross Reference Telephone Line Interface P 56 Check Link P 34 Note BBIC is IC1 12 7 1 Base Unit Note BBIC is IC2 12 7 2 Handset 37 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 38: ...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 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 ...

Page 39: ...4 2 1 Connections 14 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 connection 4 Type doskey Note See the table below for frequently used commands Command name Function Example rdeeprom Read the data of EEPROM Type rdeeprom 00 00 FF and the data from a...

Page 40: ...Q9 C40 D4 X1 C32 C33 C36 C37 B 4 0 V Supply Confirmation 1 Confirm that the voltage between TP91 and GND is 4 0 V 0 2 V D4 C40 Q9 R41 R42 C41 D5 C75 C78 C69 C66 C67 C76 IC3 C VBACK Status Confirmation 1 Confirm that the voltage between J102 and GND is 0V 0 4V IC2 Q8 C23 C24 C25 C26 C27 C38 R33 R36 D5 C41 R41 R42 Q9 C40 D4 R33 X1 C32 C33 D BBIC Confirmation 1 BBIC Confirmation Execute the command g...

Page 41: ... Adjustment Follow steps 1 to 3 of H above 4 Confirm that the B Field Modulation is 340 kHz div 402 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 IC2 IC3 L1 C43 C78 C75 C69 C48 C72 C66 C67 C76 C57 C73 L3 DA1 R66 R67 C55 C56 R78 R79 C54 C58 C86 R38 J Frequency Offset Confirmation Follow steps 1 to 3 of H abo...

Page 42: ... that the B field audio distortion with DECT tester is 5 IC2 C21 R31 C20 C11 R18 R16 D3 R12 Q2 R7 R8 Q3 R9 R10 D2 C1 C2 R77 IC3 L1 C43 C78 C75 C69 C48 C72 C66 C67 C76 C57 C73 L3 DA1 R66 R67 C55 C56 R78 R79 C54 C58 C86 R38 O Transmit Audio Check and Adjustment 1 Configure the DECT tester CMD60 as follows Setting Test mode FP Mode Normal PMID 00000 2 Execute the command testmode 3 Initiate connectio...

Page 43: ...sure and confirm voltage across the resistor is 2 3 V 0 2 V D4 R43 R44 Note After the measuring sock up the solder of TP PC Setting P 38 is required beforehand The connections of the adjustment equipment are as shown in Adjustment Standard Base Unit P 44 43 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 44: ... R71 R72 R81 R82 R53 R54 R56 R8 C60 R55 R19 R20 R25 R28 R13 R14 R11 R15 R74 R73 R7 R77 D7 D8 R70 R85 R5 R9 R10 R27 R23 C80 C79 R32 R24 D6 R12 R22 R21 R16 R18 R26 R17 D1 D5 C89 R89 C92 D2 D3 C88 C72 C66 C56 B C E B C E Q3 Q7 Q5 Q10 Q2 Q11 Q4 1 Q8 4 5 8 1 11 28 18 ANT J1 A201 A202 J2 Q9 C81 C87 C54 C58 C69 C98 C97 C78 C37 R36 R33 R52 C50 C38 C26 C77 JMP5 JMP8 JMP7 RLY1 R44 R43 C73 R68 C91 C86 C67 C7...

Page 45: ...er DC POWER 6V Digital Volt Meter Frequency Counter Digital Volt Meter Digital Volt Meter Relay Detection Circuit SDA SCL GND VBACK GND GND TP187 GND CHARGE 12 2w GND TP1 TP101 GND GND TP91 GND TP45 DTMF Tester Call ID Simulator BELL Simulator LOOP Simulator AF OSC AF VOLT METER OSC 600 TP3 TP40 GND TP2 A D E F G H N O C P E B G Note A P is referred to Adjustment Base Unit P 40 KX TCD440HGS KX TCD...

Page 46: ...the measuring sock up the solder of TP The connection of the adjustment equipment is as shown in Adjustment Standard Charger Unit P 46 15 4 Adjustment Standard Charger Unit When connecting the Simulator Equipment for checking please refer to below 15 4 1 Flow Solder Side View PbF R1 R2 TP4 TP1 TP2 TP3 Digital Volt Meter 12Ω 2W A Note A is referred to Adjustment Charger Unit P 46 46 KX TCD440HGS KX...

Page 47: ...sum value Connection of checksum value and program number is shown below IC1 X1 C16 C17 D Charge Control Check Charge Current Monitor Confirmation 1 Apply 6V between TPCHG and TPCHG with current limit of PSU to 250 mA 2 Confirm that the charge current is ON OFF 3 SW to decrease current limit of PSU to 100 mA 4 Confirm that the charge current is stable IC1 L4 L5 Q2 Q3 R6 D2 R22 C26 F1 R21 R4 C33 E ...

Page 48: ...57 C55 C56 C62 R23 C63 C64 C65 R18 L6 C67 C202 C208 C209 K Frequency Offset Confirmation Follow steps 1 to 4 of I above 5 Confirm that the frequency offset is 50 kHz 50 kHz IC1 IC3 C54 C66 C60 L3 C57 C55 C56 C62 R23 C63 C64 C65 R18 L6 C67 C202 C208 C209 L Sensitivity Receiver Confirmation Follow steps 1 to 4 of I above 5 Set DECT tester power to 88 dBm 6 Confirm that the BER is 1000 ppm IC1 IC3 C5...

Page 49: ...mit Audio Check 1 Configure the DECT tester CMD60 as follows Setting Test mode FP Mode Normal RFPI 0102030405 2 Execute the command testmode 3 Execute the command regcmd60 4 Initiate connection from DECT tester 5 Execute the command openaudio 6 Confirm that the value of EEPROM address F3F is 02 If the value is not 02 by User set 02 and power off and power on and return to clause 2 7 Input audio si...

Page 50: ... D7 D6 D3 D5 R11 VBACK TP19 TP18 TP3 TP4 R16 R104 Q102 D1 C22 C30 C8 C3 C24 C26 C28 C29 C6 R8 D2 C16 R12 C17 SP BUZ Q3 Q2 C7 C4 C5 C34 C33 C35 CHG CHG MIC R5 R7 R1 R4 R2 R3 C110 C115 C31 R20 R107 R17 L3 L6 C57 MCLK C21 C25 R19 IC1 IC2 F1 5 8 4 1 C27 Q103 TP1 TP101 TP102 R18 C56 TP2 11 1 18 28 C2 C20 C23 C18 REG L5 L4 R21 R22 R6 X1 Q1 BATT TP17 TP16 TP4V R105 R106 C101 D101 D102 Q101 R109 C106 R110...

Page 51: ...dset Item Value Refer to Remarks TX Power More than 20 dBm 25 dBm Adjustment Handset I Modulation 340 kHz div 402 kHz div Adjustment Handset J Data type Fig31 Frequency Offset 50 kHz 50 kHz Adjustment Handset K RX Sensitivity 1000 ppm Adjustment Handset L Timing Accuracy 10 ppm Adjustment Handset M RSSI Level 0 62 0 10 hex Adjustment Handset N Refer to Adjustment Handset P 47 18 HOW TO CHECK THE H...

Page 52: ... 1893 888 1893 888 4 1892 160 1892 160 1892 160 1892 160 5 1890 432 1890 432 1890 432 1890 432 6 1888 704 1888 704 1888 704 1888 704 7 1886 976 1886 976 1886 976 1886 976 8 1885 248 1885 248 1885 248 1885 248 9 1883 520 1883 520 1883 520 1883 520 10 1881 792 1881 792 1881 792 1881 792 Note Channel No 10 In the Test Mode on Base Unit and Handset 52 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS ...

Page 53: ...c Filter EEPROM IC1 SDA SCL SYRI RSSI SYEN RXDA TXDA J2 J1 IC2 IC3 4 0V Reg 2 65V Reg 4 0V 2 65V VUNREG 40 41 28 24 61 9 5 30 11 63 64 6 5 6 4 RF Module 20 30 10 33 Limit Resistor CHARGE CONTACT 18 16 XTAL 10 368 MHz DTXAF DTXAF 27 26 BBIC Interface ANT1 ANT2 to Tel_Line A B to AC Adaptor KX TCD440HGS HGT BLOCK DIAGRAM BASE UNIT KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A14...

Page 54: ...suppression DSP section Any tones tone sidetone ringing tone etc generation DSP section DTMF receiver DSP section Clock Generation for RF Module ADC DAC timer and power control circuitry All interfaces ex RF module EEPROM RINGER Analog Front End etc RF Module IC3 PLL Oscillator Detector Compress Expander First Second Mixer Amplifier for transmission and reception EEPROM IC1 Temporary operating par...

Page 55: ...daptor 6 V as shown in Fig 101 The power supply is as follows DECT BBIC IC2 J2 6 V D4 Q9 D5 Q8 IC2 RF Module IC3 J2 6 V D4 Q9 IC3 EEPROM IC1 J2 6 V D4 Q9 D5 Q8 IC2 IC1 RINGER J2 6 V D4 Q9 R68 RINGER Charge Contact TP84 J2 6 V D4 R43 R44 TP84 Fig 101 55 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 56: ...UNIT P 53 The voice signal passes through the analog part of IC2 where it is amplified and converted to a digital audio stream signal The burst switch controller processes this stream performing encryption and scrambling adding the various other 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...

Page 57: ... DETECT SWITCHED SUPPLY CHARGE CONTACTS TP5 4 0V VDDBAT VDDLR SWITCH 31 XTAL 10 368 MHz LCD BACK LIGHT KEY BACK LIGNT COLUMNS ROWS LCD 14 Seg Display ON SWITCH 38 27 26 36 37 28 pin 2 5 9 COM 0 5 segment 0 29 pin1 90 100 87 78 84 72 76 61 62 56 58 EARPIECE SPEAKER 42 41 45 17 21 53 55 59 60 34 88 SP Phone LED 52 Burst Encoding Burst Decoding TP6 D3 KX A144EXS EXT 1 A144EXS EXT BLOCK DIAGRAM HANDSE...

Page 58: ...ARGE Base CHARGE Handset L4 Q2 F1 BATTERY Battery BATTERY R21 GND L5 CHARGE Handset CHARGE Base GND DC GND In this way the BBIC on Handset detects the fact that the battery is charged The charge current is controlled by switching Q2 of Handset Refer to Fig 101 in Power Supply Circuit P 55 23 4 Battery Low Power Down Detector Circuit Operation Battery Low and Power Down are detected by BBIC which c...

Page 59: ...24 CIRCUIT OPERATION CHARGER UNIT 24 1 Power Supply Circuit The power supply is as shown 59 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 60: ...25 SIGNAL ROUTE 60 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 61: ...I for Bell Clip 28 Audio_In_N A I 29 ADC_Ref A I 30 RSSI A I 31 AD2 MPCINP A I for Polarity 32 AD3 A I for Polarity 33 NO USE D I I_PU 34 NO USE D I I_PU 35 NO USE D I I_PU 36 NO USE D I I_PU 37 VDD 38 VSS 39 Supply_EEP D O Fixed 40 Serial_Data I2C D I O Data Data 41 Serial_Clk I2C D O Active Active 42 MODE D I Fixed 43 NO USE D O Fixed 44 BELL PAGING D O RINGER_ON RINGER_OFF 45 VBACK A I 46 NO US...

Page 62: ...ion I O Hi Hi z Low Remarks 63 ANT1 D O ANT1_ON ANT1_OFF 64 ANT2 D O ANT2_ON ANT2_OFF Note I_PU Internal Pull Up I_PD Internal Pull Down 62 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 63: ...tive 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 VDDPM A O 35 VDDLO A O 36 VDDBAT A I 37 VDDLR 38 CHARGE_START A O for charge 39 VDDA 40 VSSA 41 LSRN A O 42 LSRP A O 43 BANDGAP_REF A O 44 MICS A O 45 MICP A I 46 MICN A I 47 Reference Voltage A O 48 RSSI A I 49 P0 4 D I 50 AD4N A I 51 AD4P ...

Page 64: ...SEGMENT D O Active 81 LCD_SEGMENT D O Active 82 LCD_SEGMENT D O Active 83 LCD_SEGMENT D O Active 84 LCD_SEGMENT D O Active 85 VSS 86 VDD 87 LCD_SEGMENT D O Active 88 NO USE D O 89 Power Select D O Low Power 90 LCD_SEGMENT D O Active 91 LCD_SEGMENT D O Active 92 LCD_SEGMENT D O Active 93 LCD_SEGMENT D O Active 94 LCD_SEGMENT D O Active 95 LCD_SEGMENT D O Active 96 LCD_SEGMENT D O Active 97 LCD_SEGM...

Page 65: ...try Setting x Default no specific country setting so revert to default value 28 3 EEPROM Layout 28 3 1 General Setup Address Default Name Country Setting Type Description 0000 01 00 60 EepromOscillator x A Frequency adjustment 0002 0A Modulation Deviation x A Modulation adjustment 0020 24 RFPI ID for Base Unit x A RFPI 0025 26 00 00 AC Base PIN code x D AC code 0028 00 TBR22Test x D TBR22 test 003...

Page 66: ... 3D 00 Parse Configuration x D Clip parse set configuration Bit 0 Etsi 1 enable 0 disable 1 Forward Number 1 enable 0 disable 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 User Defined 1 enable 0 disable 7 KPN vmwi 1 enable 0 disable 8 Protocol Priority If 2 mutually exclusive parameters occurs the 1st in the protocol message ha...

Page 67: ...nabled enabled 6 ARSMultipleCarrierMenuEnabled enabled 7 ARSMultipleAreaCodeMenuEnabled enabled 0F4E FF Config2 EF D BsUiTask configuration 2 Bits 1 enable 0 disable 0 RingerModeMenuEnabled enabled 1 CallRestrictionMenuEnabled enabled 2 CancelHandsetMenuEnabled enabled 3 BaseToneMenusEnabled enabled 4 ARSMenuEnabled enabled 5 CallCostMenuEnabled enabled 6 BasePINMenuEnabled enabled 7 DialModeMenuE...

Page 68: ...ault value 29 3 EEPROM contents 29 3 1 General Setup Address Default Name Country Setting Type Description 0000 0001 00 60 EepromOscillator A Frequency adjustment 0002 0A ModulationDeviation A Modulation adjustment 0030 0034 00 IPEI ID for Handset A IPEI 0036 003A PARK_1 ID for Base 1 PARK for registration 1 003B 003F PARK_2 ID for Base 2 PARK for registration 2 0040 0044 PARK_3 ID for Base 3 PARK...

Page 69: ... English 01 Spanish 02 French 03 Italian 04 Dutch 05 Turkish 06 Hungarian 07 Portuguese 08 Polish 09 UnUsed 0A German 0469 07 MaxDigitsToMatch 06 D Valid values 01 FF Digits above this value will not be evaluated when matching 046A 05 MinDigitsToMatch x D Valid values 01 FF Must be lower than MaxDigitsToMatch If all digits of one of the numbers match completely with at least this number of digits ...

Page 70: ...1 3 F57 60 CadenceVolumeLevel1 41 D Setting for Ringer Volume 1 lowest F58 50 CadenceVolumeLevel2 34 D Setting for Ringer Volume 2 F59 40 CadenceVolumeLevel3 31 D Setting for Ringer Volume 3 F5A 30 CadenceVolumeLevel4 24 D Setting for Ringer Volume 4 F5B 20 CadenceVolumeLevel5 21 D Setting for Ringer Volume 5 F5C 10 CadenceVolumeLevel6 12 D Setting for Ringer Volume 6 F5D 11 SpPhGX index x A Gain ...

Page 71: ... 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 30 3 Modification Procedure of Bridge 1 Add...

Page 72: ...31 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 72 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 73: ...CTRICAL PARTS LOCATION HANDSET Note 1 The rechargeable Ni MH battery P03P and Ni Cd battery P03H are available through sales route of Panasonic 73 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 74: ...33 CABINET AND ELECTRICAL PARTS LOCATION CHARGER UNIT 74 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 75: ...34 ACCESSORIES AND PACKING MATERIALS 34 1 KX TCD440HGS HGT 75 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 76: ...34 2 KX A144EXS EXT 76 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 77: ...35 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 35 1 Base Unit 35 2 Handset 35 3 Charger Unit 77 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 78: ...rt Name Description Remarks 6 PQSA10132Z ANTENNA SUB 7 PQYF10560Z9 CABINET COVER for KX TCD440HGS ABS HB 7 PQYF10560Z6 CABINET COVER for KX TCD440HGT ABS HB 8 PQGT16911Z NAME PLATE for KX TCD440HGS 8 PQGT16912Z NAME PLATE for KX TCD440HGT 9 L0DACA000023 BUZZER 10 PQHG10690Z RUBBER PARTS RINGER RUBBER 36 1 2 Main P C Board Parts Note 1 When replacing IC1 data need to be written to it with PQZZTCD44...

Page 79: ...7 ECUV1H100DCV 10P C98 PQCUV1H0R5CC 0 5P C100 ECUV1H100DCV 10P C101 ECUV1H100DCV 10P C102 ECUV1H100DCV 10P OTHERS IC3 J3FKK0000003 RF UNIT S1 K0H1BB000018 SPECIAL SWITCH SA1 J0LF00000026 VARISTOR SURGE ABSORBER X1 H0D103500003 CRYSTAL OSCILLATOR 36 2 Handset 36 2 1 Cabinet and Electrical Parts Ref No Part No Part Name Description Remarks 101 PQGP10226Y3 PANEL LCD for KX A144EXS 1 for KX A144EXS AS...

Page 80: ...0 1 C20 ECUE1A104KBQ 0 1 C21 ECUE1A104KBQ 0 1 C22 ECUE1A104KBQ 0 1 C23 ECUV1C104KBV 0 1 C24 ECUV1C104KBV 0 1 C26 ECUV1C104KBV 0 1 C27 ECUE1A104KBQ 0 1 C28 ECUV1C104KBV 0 1 C29 ECUV1C104KBV 0 1 C30 ECUV1C104KBV 0 1 C31 ECUE1C100DCQ 10P C33 ECUV1A225KB 2 2 C54 ECUE1C100DCQ 10P C55 ECUE1H2R0CCQ 2P C56 ECUE1H2R0CCQ 2P C57 ECUE1H330JCQ 33P C60 ECST0JY475 4 7 C62 ECUV1A105KBV 1 C64 ECUV1A105KBV 1 C65 EC...

Page 81: ...it P2 PQPP10084Z PROTECTION COVER for Handset P3 PQPK14263Z GIFT BOX P4 PQPD10603Z CUSHION P5 PQPD10620Z CUSHION 36 4 2 KX A144EXS EXT Ref No Part No Part Name Description Remarks A1 PQLV200CEZ AC ADAPTOR A2 PQQX14200Z INSTRUCTION BOOK A3 PQQW12846W LEAFLET RECHARGE P1 PQPP10086Z PROTECTION COVER for Charger Unit P2 PQPP10084Z PROTECTION COVER for Handset P3 PQPK14277Z GIFT BOX 36 5 Fixtures and T...

Page 82: ...36 6 Memo 82 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 83: ...DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams and circuit board may be modified at any time with the development of new technology 37 3 Charger Unit SCHEMATIC DIAGRAM CHARGER UNIT Notes 1 DC voltage measurements are taken with voltmeter from the negative voltage line 2 This schematic diagram may be modified at any time with the developmen...

Page 84: ...K0 01 C74 TP3 TP101 J105 1 J101 1 J104 1 J103 1 VBACK 2 65V J102 1 680P 500V C2 1 CHARGE 2 CHARGE Q2 C89 K1000P TP201 Ringer R68 39 R89 1K D9 4 0V C90 J100P Q10 TP202 Ringer C60 NC C62 NC C5 NC C63 NC C92 NC NC C7 C91 NC C6 NC D1 NC JMP3 NC JMP2 NC JMP7 NC NC JMP5 JMP6 NC JMP4 NC NC JMP8 JMP1 NC L2 NC R73 NC R71 NC R74 NC R77 NC NC R70 R72 NC Q11 NC Q1 NC C77 250V1 0 R85 390 D8 3 9V D7 3 9V NC R53...

Page 85: ...2 65V IC3 5 RSSI 6 VCC_OC 7 GND 8 SYCL 9 SYDA 10 SYEN 11 GND 12 RXDSG 13 SYRI 14 GND 15 GND 16 GND 17 GND 18 GND 19 GND 20 RXDA 21 GND 22 GND 23 GND 24 PSEL 25 PAON 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 VBACK 2 65V R57 10K L1 4 7uH C48 J33P R58 10K 2 65V R66 39 C57 C3P R67 39 C55 D10P A201 1 DA1 C58 C2P C54 C6P A202 1 C56 D10P TP187 TP188 X1 10 ...

Page 86: ...2 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 R3 56 Q1 G S D TP4 TP10 C30 K0 1 TP4V X1 10 368MHz C17 J18P C14 6 3V330 L5 10uH TP6 C16 C1P Q102 Green LED101 Q101 R101 82 Green LED102 R102 82 Green LED103 R103 82 Green LED106 Green LED105 ...

Page 87: ...11 R17 56 R20 56 C31 D10P C12 D10P TP102 IC101 1 CD 2 FC2 3 FC1 4 VIN 5 VO1 6 VCC 7 GND 8 VO2 56K R107 K0 1 C109 D101 68K R108 TP101 K0 1 C105 10K R109 D10P C110 D10P C111 D10P C108 D10P C103 K0 1 C107 K2200P C102 K1 0 C106 C65 D10P C206 K4 7 C209 D10P C62 K1 0 C64 K1 0 C56 C2P C55 C2P L6 2 7nH C208 D10P C67 C2P C116 D10P C115 D10P C202 C0 5P D7 M4 7V D6 M4 7V C207 NC NC C104 NC C101 C201 NC C63 N...

Page 88: ...ATIC DIAGRAM CHARGER UNIT TP3 R2 27 TP4 D1 2 1 J1 pinL DC_PLUG 22 Charge_minus TP1 TP2 R1 Charge_plus SCHEMATIC DIAGRAM CHARGER UNIT 88 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT ...

Page 89: ... R7 R77 D7 D8 R70 R85 R5 R9 R10 R27 R23 C80 C79 R32 R24 D6 R12 R22 R21 R16 R18 R26 R17 D1 D5 C89 R89 C92 D2 D3 C88 C72 C66 C56 B C E B C E Q3 Q7 Q5 Q10 Q2 Q11 Q4 1 Q8 4 5 8 1 11 28 18 ANT J1 A201 A202 J2 Q9 C81 C87 C 5 4 C 5 8 C69 C98 C97 C78 C37 R36 R33 R52 C50 C38 C26 C77 JMP5 JMP8 JMP7 RLY1 R44 R43 C73 R68 C91 C86 C67 C76 Q6 C15 C25 D4 L4 C93 C94 SA1 C40 C3 1 64 48 49 33 32 16 17 Bell Ringer BB...

Page 90: ...2 TP201 TP45 TP3 TP39 TP40 J101 J103 J104 J102 J105 2 65V SDA SCL GND VBACK CHARGE PbF CHARGE RINGER RINGER C99 RF clock BBIC 11 10 368MHz Q9 input 5 5V Q9 output 4V KX TCD440HGS HGT CIRCUIT BOARD BASE UNIT Flow Solder Side View KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT 90 ...

Page 91: ...L3 L6 C57 MCLK C21 C25 R19 IC1 IC2 F1 5 8 4 1 C27 Q103 TP1 TP101 TP102 R18 C56 TP2 11 18 28 1 C2 C20 C23 C18 REG L5 L4 R21 R22 R6 X1 Q1 BATT TP17 TP16 TP4V R105 R106 C101 D101 D102 Q101 R109 C106 R110 R101 R102 R103 C107 C12 C116 C206 C207 C203 C202 C204 C201 C67 C60 C66 C63 C64 C65 C54 C55 C62 R23 C208 C209 C108 C109 C102 R108 C103 C104 C111 C105 IC101 5 8 1 POWER GND SCL SDA TP21 TP20 IC3 C15 C1...

Page 92: ...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 LED101 LED107 LED108 SP_ LED104 LED106 LED105 LED102 LED103 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT 92 ...

Page 93: ...HARGER UNIT Component View 43 2 Flow Solder Side View PbF R1 R2 TP4 TP1 TP2 TP3 CIRCUIT BOARD CHARGER UNIT Flow Solder Side View 93 KX TCD440HGS KX TCD440HGT KX A144EXS 1 KX A144EXS KX A144EXT 1 KX A144EXT A I KXTCD440HGS KXTCD440HGT KXA144EXS 1 KXA144EXS KXA144EXT 1 KXA144EXT ...

Search results

Summary of Contents for KX-A144 Series

Reviews:

Related manuals for KX-A144 Series

Brands by name

Popular brands

Panasonic KX-A144 Series, Service Manual

Search results

Summary of Contents for KX-A144 Series

Reviews:

Related manuals for KX-A144 Series

Brands by name

Popular brands