Panasonic KX-TCA121EXT Page 71 Service Manual Download

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22 CIRCUIT OPERATION (BASE UNIT)

22.1. Outline

Base Unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.70).

DECT BBIC (Base Band IC): IC8

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

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

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

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Echo-cancellation and Echo-suppression (DSP section)

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

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DTMF receiver (DSP section)

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Clock Generation for RF Module

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ADC, DAC, timer, and power control circuitry

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

RF Module: IC2

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PLL Oscillator

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Detector

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Compress/Expander

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First/Second Mixer

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Amplifier for transmission and reception

EEPROM: IC3

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Temporary operating parameters (for RF, etc.)

Additionally,

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Power Supply Circuit (+3.3V, +2.5V, +1.8V output)

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Crystal Circuit (10.368MHz)

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Charge Circuit

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Telephone Line Interface Circuit

FLASH MEMORY: IC5

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Voice Prompt (TAM) D/L Area

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ICM/OGM/MEMO recording area

KX-TCD220SLT / KX-TCA122EXT / KX-TCA121EXT

Summary of Contents for KX-TCA121EXT

Page 1: ...td All rights reserved Unauthorized copying and distribution is a violation of law KX TCD220SLT KX TCA122EXT KX TCA121EXT Digital Cordless Answering System Titanium Black Version for Switzerland Telephone Equipment ORDER NO KM40503650CE ...

Page 2: ...8 9 2 Available Character Entries for SMS 29 9 3 Sending a Saved Message 30 9 4 Editing and Sending a Saved Message 30 9 5 Erasing Saved Messages 30 9 6 Receiving a Message 31 9 7 Reading a Received Message 31 9 8 Replying to a Message 31 9 9 Erasing Received Messages 31 9 10 Changing SMS Message Centre Numbers 32 9 11 Turning SMS On Off 32 10 Answering System 33 10 1 Turning the Answering System ...

Page 3: ... 83 29 1 Base Unit 83 29 2 Handset 86 30 HOW TO REPLACE THE FLAT PACKAGE IC 88 30 1 PREPARATION 88 30 2 FLAT PACKAGE IC REMOVAL PROCEDURE 88 30 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 89 30 4 BRIDGE MODIFICATION PROCEDURE 89 31 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 90 32 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 91 33 CABINET AND ELECTRICAL PARTS LOCATION CHARGER UNIT 92 34 ACCESSOR...

Page 4: ...t 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 When applying PbF solder to double layered boards please check the component sid...

Page 5: ...75 PbF IC1 IC3 IC2 X1 C21 R90 C18 C96 R92 R72 C99 C23 R87 R7 C114 R94 C120 C115 C71 R89 R88 C39 R26 C90 C103 R38 R37 C17 C109 C87 C12 L1 R12 R81 C118 C104 C5 C8 Q4 Q11 Q2 Q3 Q10 Q1 Q7 PQUP11278Z 1 1 1 8 8 4 4 5 5 20 80 61 60 41 21 40 Marked Component View Note The location of the PbF mark is subject to change without notice 2 FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricit...

Page 6: ... to feel warm during charging It takes 7 hours to fully charge the batteries however you can use the handset before the batteries are fully charged Clean the charge contacts of the 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 When flashes recharge the handset batteries will continue to flash...

Page 7: ...ure 4 4 Battery Replacement If flashes even after the handset batteries have been charged for 7 hours the batteries must be replaced Important We recommend the use of Panasonic rechargeable Ni MH batteries P03P HHR 4EPT If you install non rechargeable batteries and start charging the batteries may leak electrolyte Do not mix old and new batteries 1 Press the notch on the handset cover firmly and s...

Page 8: ...Base Unit 5 2 Handset Note Up to 3 menu items can be displayed at a time To select a menu item not shown on the current page scroll up or down by pressing the navigator key or respectively 8 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 9: ...taken that objects do not fall onto and liquids are not spilled into the unit Do not subject this product to excessive smoke dust mechanical vibration or shock Environment Do not 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...

Page 10: ...ightning storm The AC adaptor must remain connected at all times It is normal for the adaptor to feel warm during use The AC adaptor should be connected to a vertically oriented or floor mounted AC outlet Do not connect the AC adaptor to a ceiling mounted AC outlet as the weight of the adaptor may cause it to become disconnected 6 1 2 Charger Unit Important Use only the AC adaptor PQLV200CEX Note ...

Page 11: ...t the current item or setting is indicated by 6 2 1 Base Unit Note Up to 3 menu items can be displayed at a time To select a menu item not shown on the current page scroll up or down by pressing the navigator key or respectively Note If the base unit is reset to its default settings the contents of the receive and send lists will be erased 11 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 12: ...set Note Up to 3 menu items can be displayed at a time To select a menu item not shown on the current page scroll up or down by pressing the navigator key or respectively 12 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 13: ...3 Ringer Volume 6 3 1 Base Unit 6 3 2 Handset Note Alarms will sound and the handset will ring for intercom calls and when paged even if the ringer is turned off 13 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 14: ...it Using the phonebook s category feature you can also select categories of callers whose calls will override night mode and ring the handset Caller ID subscribers only Set the date and time beforehand Note When the call screening feature is on and the base unit answers a call the greeting message and caller s messages will be heard from the handset speaker even if the night mode setting is on 6 4...

Page 15: ... Registering a Handset to a Base Unit P 26 2 Follow the steps above in Base Unit P 15 of PIN Code At step 3 enter and you will able to enter new Base Unit PIN 6 5 2 Handset For security the handset PIN must be entered when changing certain settings The default PIN is For Service Hint If the current 4 digit PIN is forgotten press and you will be able to enter new Handset PIN This password is useful...

Page 16: ...your greeting message caller messages voice memos and audible call announcements and recorded conversations 6 6 2 Handset Note The following items will be deleted or reset to their default settings Handset P 12 Settings Redial list Voice enhancer Category names Category ringtones The following items will be retained Handset phonebook entries category names and ringtones will be reset to their defa...

Page 17: ... can change the recall time 6 9 Pause Button for PBX Long Distance Service Users A pause is sometimes required when making calls using a PBX or long distance service Example If you have to dial before dialling outside numbers manually you will probably pause after dialling until you hear a dial tone Note Pressing 1 time creates 1 pause Press repeatedly to create longer pauses 6 10 Setting Call Res...

Page 18: ...on only intercom calls and calls to emergency numbers can be made Note When call bar is turned on is displayed 6 12 Changing the Display Language 6 13 Changing the Recall Time Change the recall time if necessary depending on the requirements of your service provider or PBX 18 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 19: ...ure Important To use automatic route selection you must subscribe to the telephone carrier service you use store the carrier codes you use store the area codes you want to call using a specific carrier code assign a carrier code to each stored area code Contact your telephone carrier s for calling rates Example You have assigned carrier code 9876 to area code 123 If you dial 123 4567 the unit dial...

Page 20: ... a message recorded by the answering system you can call back the caller without having to dial the phone number When caller information is received and it matches a phone number stored in the unit s phonebook The stored name will be displayed and logged in the caller list The handset will use the ringtone assigned to the caller s category The handset will announce the audible call recording you m...

Page 21: ...e that is not flashing Note To correct a digit press or to move the cursor then make the correction The date and time may be incorrect after a power failure In this case set the date and time again 8 3 Redialling Previously dialled phone numbers each 24 digits max can be redialled 8 3 1 Making a Call Using the Redial List The last 10 phone numbers dialled are stored in the redial list 8 3 2 Redial...

Page 22: ...to the phonebook assign each phonebook entry to the desired category and search for phonebook entries by name or category 8 4 1 Adding Entries to the Phonebook Note If there is no space to store new entries will be displayed Erase unnecessary entries 8 4 2 Available Character Entries 22 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 23: ...23 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 24: ...egory Changing a name phone number category 8 4 4 Erasing Entries from the Phonebook Erasing an entry Erasing all entries 8 4 5 Storing a Number from the Caller List into the Phonebook Cross Reference Adding Entries to the Phonebook P 22 8 4 6 Storing a Number from the Redial List into the Phonebook 24 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 25: ...ntry is not erased 8 4 8 Copying Phonebook Entries to Other Handsets Phonebook entries can be copied from the handset to the phonebook of a compatible Panasonic handset Copying One Entry Copying All Entries Note If the other handset the receiver is not in standby mode is displayed on your handset the sender If copying failed after copying at least 1 entry is displayed on your handset the sender 25...

Page 26: ...s to stop Start again from step 1 Charge the batteries of your additional handset for about 7 hours before initial use This registration method cannot be used for handsets that have already been registered to a base unit Register the handset manually manual registration To Register a Handset to an Additional Base Unit Manual Registration You can register a handset to a base unit manually using the...

Page 27: ...dset to another base unit or to the same base unit again see manual registration 8 6 Selecting a Base Unit When is selected the handset will automatically use any available base unit it is registered to When a specific base unit is selected the handset will make and receive calls using that base unit only If the handset is out of range of that base unit no calls can be made 27 KX TCD220SLT KX TCA1...

Page 28: ...message If the unit is connected to a PBX system you may not be able to use SMS features 9 1 Writing and Sending a New Message Note This unit supports SMS messages of up to 612 characters however the maximum number of characters you can send or receive may be limited by your SMS service provider Consult your SMS service provider for details If your message contains over 160 characters is displayed...

Page 29: ...9 2 Available Character Entries for SMS 29 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 30: ...ssage Cross Reference Writing and Sending a New Message P 28 9 4 Editing and Sending a Saved Message Cross Reference Writing and Sending a New Message P 28 9 5 Erasing Saved Messages 30 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 31: ...t be received Erase unnecessary messages If you receive a message from a party saved in the handset phonebook the stored name is displayed Some SMS service providers attach a 1digit number to the message sender s phone number and sender names stored in the handset phonebook may not be displayed as a result 9 8 Replying to a Message Cross Reference Writing and Sending a New Message P 28 9 9 Erasing...

Page 32: ... to add the PBX line access number and a dialling pause to the beginning of the Message Centre 1 phone number For Message centre 2 store the Message centre 1 phone number as is without adding a line access number or dialling pause 9 11 Turning SMS On Off Note If you try to send a message while SMS is turned off a tone sounds and the message is placed in the receive list with attached to it If some...

Page 33: ...nswering System 10 1 Turning the Answering System On Off 10 2 Greeting Message 10 2 1 Using a prerecorded greeting message 10 2 2 Playing back the greeting message 33 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 34: ...tored and played back chronologically from oldest message to newest 10 3 1 Listening to new all message 10 3 2 Repeating skipping stopping erasing a message during playback 10 3 3 Erasing All Messages 34 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 35: ...10 4 Using Direct Commands 35 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 36: ...10 5 Remote Operation 10 5 1 Turning remote operation on off 10 5 2 Turning on the answering system remotely 36 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 37: ...e AC adaptor and turn on the handset Cross Reference 1 Registering a Handset to a Base Unit P 26 2 Turning the Power On Off P 21 3 Battery Installation P 6 4 Battery Charge P 6 Cross Reference 5 Turning Call BAR On Off Call Prohibition P 18 6 Setting Call Restriction P 17 7 Key Lock P 17 8 Ringer Volume P 13 9 Night Mode P 14 37 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 38: ...s Reference 10 Battery Charge P 6 11 Battery Replacement P 7 12 Caller ID Display P 20 13 Cancelling a Base Unit P 27 14 Cancelling a Handset P 26 15 PIN Code P 15 38 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 39: ...Erasing Saved Messages P 30 18 Erasing Received Messages P 31 19 Turning SMS On Off P 32 Cross Reference 20 Erasing All Messages P 34 21 Turning remote operation on off P 36 22 Turning on the answering system remotely P 36 39 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 40: ...CTIONS 12 1 Base Unit Shown in Fig To Remove Remove 1 Cabinet Cover Screws 2 6 10 A 4 2 Main P C Board Solders Main P C Board 3 Small P C Board Screw 2 6 x 10 B x 1 Small P C Board 40 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 41: ...set Shown in Fig To Remove Remove 4 Cabinet Cover Screws 2 10 C 2 5 Follow the procedure 6 Main P C Board Screw 2 10 D 1 Screws 2 10 E 2 Tapes and Solders Main P C Board 41 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 42: ...12 3 Charger Unit Shown in Fig To Remove Remove 7 Cabinet Cover Screws 2 6 10 F 2 8 Main P C Board Solders Main P C Board 42 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 43: ...13 HOW TO REPLACE THE HANDSET LCD 43 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 44: ...P 45 Bell Reception P 52 Check Battery Charge P 46 Check Link P 47 Check Handset Transmission P 51 Check Handset Reception P 51 SIGNAL ROUTE P 77 Check TAM Operation P 52 14 TROUBLESHOOTING FLOWCHART 44 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 45: ...it Is the AC Adaptor inserted into AC outlet Check AC Adaptor s specification Cross Reference Power Supply Circuit P 72 14 1 2 Handset Cross Reference Power Supply Circuit Reset Circuit P 75 45 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 46: ...arge 14 2 1 Base Unit Cross Reference Charge Circuit P 75 14 2 2 Handset Cross Reference Check Power P 45 Charge Circuit P 75 14 2 3 Charger Unit Cross Reference Charge Circuit P 75 46 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 47: ...14 3 Check Link 14 3 1 Base Unit 47 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 48: ...Cross Reference Power Supply Circuit P 72 Check Point Base Unit P 53 48 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 49: ...14 3 2 Handset 49 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 50: ...Cross Reference Power Supply Circuit Reset Circuit P 75 Check Point Handset P 60 50 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 51: ...4 Check Handset Transmission Cross Reference SIGNAL ROUTE P 77 14 5 Check Handset Reception Cross Reference HOW TO CHECK THE HANDSET SPEAKER OR RECEIVER P 69 SIGNAL ROUTE P 77 14 6 Check Caller ID 51 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 52: ...t 14 7 2 Handset Cross Reference Telephone Line Interface P 73 Check Link P 47 HOW TO CHECK THE HANDSET SPEAKER OR RECEIVER P 69 14 8 Check TAM Operation Cross Reference Power Supply Circuit P 72 52 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 53: ... Confirm that the voltage between test point VDD2 and GND is 2 5V 0 2V Q2 C5 C7 C168 C 1 8V Supply Confirmation TP15 1 Confirm that the voltage between test point VDD1 and GND is 1 8V 0 1V Q3 C6 C11 C48 C4 C37 C39 C44 C45 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 X1 C42...

Page 54: ...70dBm 2 Execute the command testmode 3 Execute the command sendchar dmv 2 2 4 Check that Signalling Status has been set to Locked then press ACCEPT RFPI 5 Initiate connection from Dect tester set up connect 6 Execute the command ANT1 7 Confirm that the NTP value at ANT is 20dBm 25dBm IC2 IC8 R124 R125 C153 C140 C141 DA1 C142 C143 C144 L3 L4 R118 R119 C135 R115 R116 Q6 C145 C147 C149 C151 C157 R123...

Page 55: ...5 R115 R116 Q6 C145 C147 C149 C151 C157 R123 C158 C159 C160 C161 C162 C163 C164 C136 R117 R127 C156 C154 C155 N Timing Confirmation Follow steps 1 to 6 of I 7 Confirm that the Timing accuracy is 2 0ppm IC2 IC8 R124 R125 C153 C140 C141 DA1 C142 C143 C144 L3 L4 R118 R119 C135 R115 R116 Q6 C145 C147 C149 C151 C157 R123 C158 C159 C160 C161 C162 C163 C164 C136 R117 R127 C156 C154 C155 O RSSI Level Conf...

Page 56: ...t TEL Line 600Ω Load 4 Input 20dBm 1kHz to Line I F Measure the level at Receiver of Handset and distortion level Receive volume set to second position from minimum 5 Confirm that the level is 20 5dBm 2dBm and that the distortion level is 5 at Receiver Volume Middle 150Ω Load IC8 CN1 SA1 L6 L7 D3 Q4 Q5 R23 R25 R26 R28 R Charging Check 1 Connect Charge Contact 12Ω 2W resistor between charge and cha...

Page 57: ...Oscilloscope 15 2 1 2 JIG and PC 15 2 2 PC Setting 15 2 2 1 Connections 15 2 2 2 PC Setting 1 Open a window of MS DOS mode from the start up menu 2 Change a directory 3 Type SET_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 a...

Page 58: ... RX J103 GND J104 GND VDD2 CHARGE CHARGE TP16 TP15 Digital Volt Meter 12Ω 2W R GND CLK Frequency Counter F AF OSC AF Volt Meter Dummy Handset SP MIC OSC 150Ω 6 3V 47uF ANT GND DECT Tester CMD60 I J K L M N O P DCP GND DC POWER 6V BELL Simulator Loop Simulator AF Volt Meter AF OSC Call ID Simulator DTMF Tester L1T L1R OSC 600Ω H G Q GND GND BUZ LINE_DC Digital Volt Meter AF Volt Meter VDD1 VDD3 Not...

Page 59: ...up the solder of TP The connection of adjustment equipment is as shown in Adjustment Standard Charger Unit P 59 15 5 Adjustment Standard Charger Unit When connecting the Simulator Equipment for checking please refer to below 15 5 1 Flow Solder Side View TP3 TP2 TP1 A D11 WHITE BLUE PbF TP4 PQUP11305Z DC POWER 6V GND TP2 TP3 GND TP2 TP1 A Digital Volt Meter 12Ω 2W R12 R11 R1 R2 Note A is referred t...

Page 60: ... 2 Execute the command bandgap then check the current value 3 Adjust the 1 8V voltage of VDD1 executing command bandgap XX XX is the value IC1 Q2 C40 B DC DC Supply Confirmation VDD3 1 Confirm that the voltage between test point VDD3 and GND is 3 3V 0 3V Backlight is ON IC1 F1 C1 C3 C57 R1 Q1 D1 L1 57 C 2 5V Supply Confirmation VDD2 1 Confirm that the voltage between test point VDD2 and GND is 2 5...

Page 61: ...Voltage write YY 1D EEPROM 0X000A Low Voltage BL write YY 06 No Voltage writing data limit is 00 c XX 00 17 Reject XX 33 FF Reject IC1 F1 C1 C3 C118 I Battery Low Confirmation 1 Apply 2 40V between BATTERY and BATTERY 2 Confirm that there is no flashing of Battery Icon 3 Apply 2 25V 0 08V between BATTERY and BATTERY 4 Confirm that there is flashing of Battery Icon IC1 F1 C1 C3 C118 J BBIC Clock Ad...

Page 62: ...at the Timing accuracy is 2 0ppm IC1 R54 C62 C123 C60 C63 C45 C44 C47 C46 C49 C48 C50 C53 C51 R59 C54 C55 CN6 Q RSSI Level Confirmation Follow steps 1 to 3 of K 4 Set DECT tester power to 81dBm 5 Execute the command readrssi 6 Confirm that the returned value is 0 1C 8 hex 7 Set DECT tester power to 63dBm 8 Execute the command readrssi 9 Confirm that the returned value is 0 25 8 hex IC1 R54 C62 C12...

Page 63: ...to 48V and line current to 40mA 3 Set the handset off hook using SP Phone key 4 Input 25dBm 1KHz to Line I F and measure Receiving level at SP1 and SP2 5 Confirm that the level is 15 5dBm 2dBm and that the distortion level is 5 vol 3 IC1 C37 C68 C91 R25 R26 C20 C12 C87 C109 R85 C103 C10 C17 R86 R29 R37 R38 L6 L7 C79 C78 63 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 64: ... line loss ex The customer is using optical fiber ISDN terminal adaptor or PBX In this case receiving signal is strong and it may affect transmission signal 2 When the other party is talking from noisy place ex The other party is using cellular phone The background noise is very loud In this case the noise from the other party i e surrounding noise may affect transmission signal Setting Method Cha...

Page 65: ...r Handset Digital multi meter DMM it must be able to measure voltage and current Oscilloscope 16 3 1 2 JIG and PC 16 3 2 PC Setting 16 3 2 1 Connections 16 3 2 2 PC Setting 1 Open a window of MS DOS mode from the start up menu 2 Change a directory 3 Type SET_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 Comman...

Page 66: ...22 C113 C24 R68 C100 C20 C7 R21 R20 BAT GND C57 C1 C53 CN6 C51 C50 C48 C49 C67 A 17 26 10 1 C84 R75 PbF IC1 IC3 IC2 X1 C21 R90 C18 C96 R92 R72 C99 C23 R87 R7 C114 R94 C120 C115 C71 R89 R88 C39 R26 C90 C103 R38 R37 C17 C109 C87 C12 L1 R12 R81 C118 C104 C5 C8 Q4 Q11 Q2 Q3 Q10 Q1 Q7 PQUP11278Z 1 1 1 8 8 4 4 5 5 20 80 61 60 41 21 40 Current Probe DC 6V Oscilloscope AF Generator AF Volt Meter DECT test...

Page 67: ... to Check Point Base Unit P 53 17 2 Handset IC Necessary Adjustment BBIC Programs for Voice processing interface for RF and EEPROM 1 Default batch file Execute the command default 2 Default batch file remaining Execute the command TCA121 DEFrevYY 3 Except for KX TCA121 122 FX and KX TCA121 122 RU 3 Country version batch file Execute the command TCA121XXrevYY 3 4 Clock adjustment Refer to Check Poi...

Page 68: ... Power RAMP is matching Check Point Base Unit P Refer to Check Point Base Unit P 53 18 2 Handset Item Value Refer to Remarks TX Power 20 dBm 25 dBm Check Point Handset K Modulation 350 400 320 370 kHz div Check Point Handset L Data type Fig31 Frequency Offset 45 kHz 45 kHz Check Point Handset M Frequency Drift 30 kHz ms Check Point Handset N RX Sensitivity 1000 ppm Check Point Handset O Timing Acc...

Page 69: ...Frequency 1 1897 344 1897 344 1897 344 1897 344 2 1895 616 1895 616 1895 616 1895 616 3 1893 888 1893 888 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 Chan...

Page 70: ...ng Speech Encoding BMC Burst Decoding Burst Encoding RF Interface 18 19 RXDA TXDA 15 21 20 22 RSSI SYCL SYDA SYEN ANT1 ANT2 RF Module 4 10 2 31 8 21 14 13 12 12 13 XTAL X1 10 368 MHz EEPROM SCL SDA 6 5 To AC Adaptor CN1 Limit Resistor CHARGE CONTACT VUNREG 3 3V Reg IC1 2 5V Reg Q2 1 8V Reg Q3 3 3V 2 5V 1 8V BBIC IC3 FLASH MEMORY TAM RESET CS 23 36 SCK SI 38 39 SO 40 IC5 IC8 IC2 KX TCD220 BLOCK DIA...

Page 71: ...ection 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 LED Analog Front End etc RF Module IC2 PLL Oscillator Detector Compress Expander First Second Mixer Amplifier for transmission and reception EEPROM IC3 Temporary operating parameters for RF etc A...

Page 72: ...or 6V as shown in Fig 101 The power supply is as follows DECT BBIC IC8 CN1 6V D1 IC1 Q2 IC8 RF Module IC2 CN1 6V D1 IC1 Q2 IC2 PLL CN1 6V D1 IC1 IC2 Power AMP EEPROM IC3 CN1 6V D1 IC1 Q2 IC3 FLASH MEMORY IC5 CN1 6V D1 IC1 IC5 Charge Contact TP15 CN1 6V D1 R3 R5 TP15 Fig 101 72 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 73: ...lock The voice signal input from the TEL LINE interface goes to RF Module IC2 through DECT BBIC IC8 as shown in BLOCK DIAGRAM BASE UNIT P 70 The voice signal passes through the analog part of IC8 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 G...

Page 74: ...Front End D A A D 30 32 66 67 72 62 52 45 44 58 56 59 60 6 9 10 77 ADPCM Codec Filter DSP Speech Decoding Speech Encoding BMC Burst Decoding Burst Encoding RF Interface RF Module CN6 23 22 RXDA TXDA 19 26 25 24 RSSI SYDA SYEN SYCL 16 17 XTAL X1 10 368 MHz BATTERY 61 ON SWITCH KEYPAD ROWS COLUMNS 1 12 40 76 27 28 34 35 36 74 BBIC IC1 IC3 11 LCD BACK LIGHT KEY BACK LIGHT SP PHONE LIGHT 7 75 46 KX TC...

Page 75: ...the charge current is as follows DC 5 5V 6V D1 R4 R5 CHARGE Base CHARGE Handset L4 Q4 D7 F1 BATTERY Battery BATTERY R43 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 Q5 of Handset Refer to Fig 101 in Power Supply Circuit P 72 24 4 Battery Low Power Down Detector Circuit Operati...

Page 76: ...25 CIRCUIT OPERATION CHARGER UNIT 25 1 Power Supply Circuit The power supply is as shown 76 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 77: ...26 SIGNAL ROUTE 77 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 78: ...78 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 79: ...D 29 VSS 30 VDDIO 31 VDD 32 PCM_FSC INT0n P1 0 D I O INT0n O I PU 33 P0 0 UTX D I O UTX O I PU 34 P0 1 URX D I O URX O I PU 35 P0 2 JTIO D I O JTIO O I PU 36 P0 3 SDA2 D I O P0 3 O I PU 37 P0 4 SCL2 D I O P0 4 O I PU 38 P0 5 SPICLK PCM_CLK D I O SPICLK O I PU 39 P0 6 SPIDO PCM_DOUT D I O SPIDO O I PU 40 P0 7 SPIDI PCM_DIN D I O SPIDI O I PU 41 VSS 42 VDD 43 P2 3 ADC1 I ADC1 I I 44 P1 7 CHARGE INT7...

Page 80: ...Pin No Description I O Connection at Normal mode at Reset mode 63 ADC2 A I ADC2 I I 64 ADC0 A I ADC0 I I 80 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 81: ...2 O L I PD 29 VSSPA 30 PAOUTm D O PAOUTm O O 31 VDDPA 32 PAOUTp D O PAOUTp O O 33 VSSPA 34 P3 3 PD3 D I O COL3 O L I PD 35 P3 4 PD4 D I O COL4 O L I PD 36 TDOD P3 5 PD5 D I O COL5 O L I PD 37 VSS 38 VDDIO 39 VDD 40 PCM_FSC INT0n P1 0 D I ROW0 I I PU 41 P0 0 UTX D I O UTX O I PU 42 P0 1 URX D I O URX O I PU 43 P0 2 JTIO D I O JTIO O I PU 44 P0 3 SDA2 D I O P0 3 O I PU 45 P0 4 SCL2 D I O P0 4 O I PU...

Page 82: ...Rp O O 68 MICn A I RINGING I I 69 VREFm 70 VBUF O VBUF O O 71 AGND A O AGND O O 72 MICp A I MICp I I 73 VREFp A I CIDINp I I 74 P3 0 D I O COL0 O L I PD 75 P1 4 INT4n D O Key_LED O O L 76 P1 3 INT3n D I ROW3 I I 77 P2 2 CLK100 D O LCD_RESET O I PD 78 AVS_sence I AVS_sence I I 79 ADC2 A I ADC2 I I 80 ADC0 A I NC I I 82 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 83: ...29 ENGINEERING MODE 29 1 Base Unit 83 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 84: ... by 6dB or 12dB SMS FSK receiving sensitivity 04 3D 00 01 6dB up 02 12dB up When hex changes from 00 to 01 or 02 gain increases by 6dB or 12dB SMS FSK sending level 04 56 04 57 00 0B 00 16 6dB up 00 2C 12dB up When hex changes from 00 0B to 00 16 or 00 2C gain increases by 6dB or 12dB Frequency 00 01 75 Use these items in a READ ONLY mode to confirm the contents Careless rewriting may cause seriou...

Page 85: ...ity Foutgains HPFilter Foutgains SMS FSK receiving sensitivity FSKGain_shiftgain SMS FSK sending level wFskAttn Signal Output Attenuation DSP parameter Frequency Setting value of FREQ_TRIM_REG ID ID Bell length Time until it stops bell 85 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 86: ...29 2 Handset 86 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 87: ...ssible Adjusted Value MIN hex Remarks Sending level 00 06 Adjusted value Given value 6F 00 1 Receiving level 00 07 Adjusted value Given value 00 3F 2 Battery Low 00 04 25 3 Frequency 00 01 75 ID 00 10 00 14 Given value 3 Use these items in a READ ONLY mode to confirm the contents Careless rewriting may cause serious damage to the computer system 4 Items Description Sending level Analog Front End M...

Page 88: ... Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free P 4 30 2 FLAT PACKAGE IC REMOVAL PROCEDURE 1 Put plenty of solder on the IC pins so that the pins can be completely covered Note If the IC pins are not soldered enough you may give pressure to the P C board when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and its pi...

Page 89: ...rresponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 30 4 BRIDGE MODIFICATION PROCEDURE 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below 89 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 90: ...31 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 90 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 91: ...rgeable Ni MH battery P03P HHR 4EPT is available through sales route of Panasonic 2 Attach the spacer No 122 to the exact location described above 3 This cable is fixed by welding Refer to HOW TO REPLACE THE HANDSET LCD P 43 91 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 92: ...33 CABINET AND ELECTRICAL PARTS LOCATION CHARGER UNIT 92 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 93: ...34 ACCESSORIES AND PACKING MATERIALS 34 1 KX TCD220SLT 93 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 94: ...34 2 KX TCA121EXT 94 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 95: ...35 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 35 1 Base Unit 35 2 Handset 35 3 Charger Unit 95 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 96: ...Description Remarks 9 PQBC10415Z1 PUSH BUTTON ABS HB 10 PQSA10154Z ANTENNA 11 PQKF10631Z3 CABINET COVER PS HB 12 PQGT17758X NAME PLATE 13 PQHA10023Z RUBBER PARTS FOOT CUSHION 36 1 2 Main P C Board Parts Note 1 When replacing IC3 or IC8 data need to be written to them with PQZZTCD220SL Refer to Base Unit P 67 of THINGS TO DO AFTER REPLACING IC Ref No Part No Part Name Description Remarks PCB1 PQWPC...

Page 97: ...4 ECUV1C104KBV 0 1 C25 ECJ0EC1H100D 10P Ref No Part No Part Name Description Remarks C26 ECJ0EC1H220J 22P C27 ECJ0EC1H100D 10P C28 ECUV1A224KBV 0 22 C29 ECUV1H100DCV 10P C30 ECUV1C104KBV 0 1 C32 ECUE1A223KBQ 0 022 C34 F1G1A1040006 0 1 C36 ECUV1H100DCV 10P C37 F1G1A1040006 0 1 C38 F1G1A1040006 0 1 C39 ECUV1A105KBV 1 C40 PQCUV1A225KB 2 2 C41 ECUV1C563KBV 0 056 C42 ECUV1H060DCV 6P C43 ECJ0EC1H270J 27...

Page 98: ...placing the Handset LCD See HOW TO REPLACE THE HANDSET LCD P 43 Ref No Part No Part Name Description PCB100 PQWPCD220SLR MAIN P C BOARD ASS Y RTL for KX TCD220SLT PCB100 PQWPCA122EXR MAIN P C BOARD ASS Y RTL for KX TCA121EXT ICs IC1 C1CB00001994 IC BBIC 1 Ref No Part No Part Name Description IC3 PQWI2A130EXR IC EEPROM 1 TRANSISTORS Q1 PQVTFDN335N TRANSISTOR SI Q2 B1ADGE000004 TRANSISTOR SI Q3 B1AD...

Page 99: ...0P C109 ECJ0EC1H100D 10P C111 ECJ0EC1H101J 100P C112 ECJ0EC1H101J 100P C113 ECUV1H101JCV 100P C114 ECJ0EC1H100D 10P C115 ECJ0EC1H100D 10P C116 ECJ0EC1H100D 10P C117 ECJ0EC1H100D 10P C118 ECUV1H103KBV 0 01 C119 F1G1A1040006 0 1 C120 F1G1A1040006 0 1 C121 ECUV1H102KBV 0 001 C122 ECUV1A105KBV 1 C123 ECUV1H100DCV 10P OTHERS MIC L0CBAB000052 MICROPHONE E101 PQHR11088Y GUIDE LCD E102 PQHR11092Z TRANSPAR...

Page 100: ...EAFLET RECHARGE P1 PQPP10086Z PROTECTION COVER for Charger Unit P2 PQPP10084Z PROTECTION COVER for Handset P3 PQPK14604Z GIFT BOX 36 5 Fixtures and Tools Note 1 See The Setting Method of JIG Base Unit P 57 and The Setting Method of JIG Handset P 65 2 When replacing the Handset LCD See HOW TO REPLACE THE HANDSET LCD P 43 Part No Part Name Description Remarks PQZZ1CD300E JIG CABLE 1 PQZZTCD220SL BAT...

Page 101: ... HANDSET Notes 1 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 wi...

Page 102: ...T IN1 3 CONT2 4 GND 5 IN OUT2 6 OUT IN2 7 CONT1 8 Vcc C43 J27P 1005 C42 D6P X1 10 368MHz C167 18 2125 C171 K1000P R138 27 3216 C172 J100P 1005 CN14 Q15 R139 470 1005 2 5V 2 5V VDD3 TP15 TP16 D16 2 5V 3 3V L2R L2T L1R L1T DCM DCP Q16 1 2K R142 1005 15K R141 1005 R140 1K 1005 C174 K0 1 1005 180 R143 C29 D10P C25 D10P 1005 C26 J22P 1005 C8 D10P R37 18 2125 BUZ C170 NC 1005 C80 NC 5750 NC D2 D14 NC D1...

Page 103: ...1005 R136 10K 1005 C140 10P J22P C153 1005 C144 D10P D10P C156 1005 C2P C155 1005 C163 D10P 1005 DA1 1 3 2 C143 D10P ANT_1 1 RF_UNIT 1 GND 2 ANT2 3 VCCPA 4 GND 5 GND 6 VCC_OC 7 GND 8 RSSI 9 SYRI 10 GND 11 GND 12 SYEN 13 SYDA 14 SYCL 15 GND 16 RX_DATA 17 GND 18 TXDA 19 GND 20 RESET 21 ANT1 22 GND 23 GND 24 GND 25 GND 26 GND 27 GND 28 GND 29 GND 30 GND 31 A_1 32 GND D7P C157 1005 C162 D10P 1005 C141...

Page 104: ...5 R69 F820K R70 F430K LED3 GREEN Q7 R71 220 Q8 2 5V X1 10 368MHz UP SOFT_A INT 1 2 3 0 1 8V R7 220K VDD3 Q3 J2 1 BATTERY C39 K1 0 L4 10uH VDD1 F1 5 6nH L5 10uH R47 5 6K C5 6 3V10 R1 0 1R 0 1W 2125 TP20 J3 1 CHARGE Q1 G S D D6 BATTERY J4 1 CHARGE R57 68 R4 3 0 1R 0 1W 2125 D7 Q5 2SC4617RTL TP21 L1 47uH Q4 C4 D10P C40 6 3V10 C3 K0 1 1 8V D1 SM140A T VDD2 C1 4V330 R5 470 R46 5 6K BAT C57 6 3V330 Q2 J...

Page 105: ...VO2 SP_TEST2 SP_TEST1 TP22 MIC R37 0 R38 0 C12 K1 0 TP23 3 3V NC C67 1005 NC C76 C61 NC C64 NC 2125 C65 NC C59 NC 2125 R62 NC 1005 R55 NC 1005 NC C83 1005 R75 1K 1005 K1000P C84 1005 ANT D10P C70 D10P C69 R74 NC C109 D10P 1005 D10P C78 2125 D10P C79 2125 J10P C95 2125 C90 NC 1005 R85 33 1005 R25 330 1005 R26 330 1005 C10 K0 1 R86 33 2 2K R29 C103 D10P C87 D10P C17 D10P C123 D10P L9 33nH C13 NC NC ...

Page 106: ...MATIC DIAGRAM CHARGER UNIT J1 1 2 DC_PLUG TP2 Charge_minus TP1 Charge_plus TP3 TP4 D1 NC R1 NC NC R2 D11 22 R12 R11 22 SCHEMATIC DIAGRAM CHARGER UNIT NC No Components 106 KX TCD220SLT KX TCA122EXT KX TCA121EXT ...

Page 107: ... C40 C29 C199 C200 C75 R70 R107 R47 R42 R58 C76 C30 R72 R71 R48 R59 R52 TP9 TP10 R54 R27 C18 R26 C192 C36 C21 C52 C193 C198 C47 R49 R144 R28 R140 R139 R138 C171 C172 C182 R142 R141 R143 C174 C41 R129 C214 C26 5 4 8 1 C50 C22 C194 R56 R57 R78 R79 R17 C1 C212 C166 R126 R127 R132 R135 R136 R137 R87 R86 C123 R55 C121 C122 C48 C201 R88 C204 R84 TP23 C156 C137 C160 C159 C154 C155 C162 C163 C161 C181 C19...

Page 108: ...CLK VDD2 TP16 TP15 A_1 A_2 ANT VDD1 VDD3 J101 TP19 TP20 RED BLACK J104 J103 J102 Copper plate LINE_DC L2T L1T CN1 L2R L1R DCP DCM PbF KX TCD220 CIRCUIT BOARD BASE UNIT Flow Solder Side View KX TCD220SLT KX TCA122EXT KX TCA121EXT 108 ...

Page 109: ...R67 R66 C14 R34 C75 C38 C77 R61 R71 R40 R39 R64 D5 D8 D4 R60 JTAG R63 VDD1 VDD2 POWER R91 C93 C41 C4 C94 C22 C72 R15 R57 R96 C116 C117 C122 C113 C24 R68 C100 C20 C7 R21 R20 BAT GND C57 C1 C53 CN6 C51 C50 C48 C49 C67 A 17 26 10 1 C84 R75 PbF IC1 IC3 IC2 X1 C21 R90 C18 C96 R92 R72 C99 C23 R87 R7 C114 R94 C120 C115 C71 R89 R88 C39 R26 C90 C103 R38 R37 C17 C109 C87 C12 L1 R12 R81 C118 C104 C5 C8 Q4 Q1...

Page 110: ... MAIL DOWN RIGHT LEFT 1 2 3 6 5 7 0 LED6 LED5 R 4 9 8 INT MIC TALK LED7 LED4 LED9 LED1 LED2 LED3 R95 R70 C31 C32 C28 R73 C52 C30 C35 C33 C34 L8 R69 R65 C121 C27 KX TCA122 121 CIRCUIT BOARD HANDSET Flow Solder Side View KX TCD220SLT KX TCA122EXT KX TCA121EXT 110 ...

Page 111: ...CIRCUIT BOARD CHARGER UNIT Component View D1 A 43 2 Flow Solder Side View TP3 TP2 TP1 D11 WHITE BLUE R12 PbF R11 R1 R2 TP4 PQUP11305Z CIRCUIT BOARD CHARGER UNIT Flow Solder Side View A 111 KX TCD220SLT KX TCA122EXT KX TCA121EXT A I S KXTCD220SLT KXTCA122EXT KXTCA121EXT ...

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