Panasonic KX-TG1843ALS Service Manual Download Page 45

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15 CIRCUIT OPERATION (BASE UNIT)

15.1. Outline

Base Unit consists ofthe following ICs as shown in

BLOCK DIAGRAM (BASE UNIT)

(P.44).

•

DECT BBIC (

ase

and IC): IC4

−

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

−

Controlling the DECT specific physical layer and radio section (

urst

odule

ontroller 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, 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.)

•

FLASH MEMORY: IC6

−

Voice Prompt (TAM) D/L (Down Load) Area

•

FLASH MEMORY: IC8

−

Program D/L (Down Load) Area

•

Additionally,

−

Power Supply Circuit (+4.0V, +3.0V, +2.5V, +1.8V output)

−

Crystal Circuit (10.368MHz)

−

Charge Circuit

−

Telephone Line Interface Circuit

−

SP Phone Circuit

KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS

Summary of Contents for KX-TG1843ALS

Page 1: ... Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX TG1843ALS KX TGA122AZS KX TGA121AZS Digital Cordless Answering System Silver Version for Australia Telephone Equipment ORDER NO KM40509891CE ...

Page 2: ...ing Method of JIG Handset 38 9 4 Adjustment Standard Handset 40 10 THINGS TO DO AFTER REPLACING IC 41 10 1 Base Unit 41 10 2 Handset 41 11 RF SPECIFICATION 42 11 1 Base Unit 42 11 2 Handset 42 12 HOW TO CHECK THE SPEAKER OR RECEIVER 43 13 FREQUENCY TABLE MHz 43 14 BLOCK DIAGRAM BASE UNIT 44 15 CIRCUIT OPERATION BASE UNIT 45 15 1 Outline 45 15 2 Power Supply Circuit 46 15 3 Telephone Line Interface...

Page 3: ... 77 30 FOR SCHEMATIC DIAGRAM 79 30 1 Base Unit SCHEMATIC DIAGRAM BASE UNIT_MAIN 79 30 2 Handset SCHEMATIC DIAGRAM HANDSET 79 30 3 Charger Unit SCHEMATIC DIAGRAM CHARGER UNIT 79 31 SCHEMATIC DIAGRAM BASE UNIT_MAIN 80 32 SCHEMATIC DIAGRAM BASE UNIT_OPERATION 82 33 SCHEMATIC DIAGRAM HANDSET 84 34 SCHEMATIC DIAGRAM CHARGER UNIT 86 35 CIRCUIT BOARD BASE UNIT_MAIN 87 35 1 Component View 87 35 2 Flow Sol...

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: ... 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 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 electric...

Page 6: ...r the handset 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 cont...

Page 7: ...over time depending on usage conditions and ambient temperature 4 1 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 HHR 4EPT If you install non rechargeable batteries and start charging the batteries may leak electrolyte Do not mix old and new batt...

Page 8: ... Base Unit 4 2 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 TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 9: ...he 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 The unit will not work during a power failure We recommend connecting a standard telephone to the same telephone line or to the same telephone socket using a telephone double adaptor This ...

Page 10: ...Base Unit Settings These items are customised using the 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 4 4 2 SMS Settings Note If the base unit is reset to its default settings the contents of the receive and send lists will be erased 4 4 3 Answering System Settings 10 KX...

Page 11: ... with a mark are not shown on the display 4 5 For Service Hint Items Contents Battery You could use other rechargeable batteries sold in a market but the unit is not guaranteed to work properly PIN Code If you forget Base Unit or Handset PIN code press 7 0 0 0 as a PIN code This is called super password and is effective when you have forgotten the PIN code 11 KX TG1843ALS KX TGA122AZS KX TGA121AZS...

Page 12: ...e Remove 1 Cabinet Cover Screws 2 6 14 A 5 2 Main P C Board Tapes and Solders 3 Main P C Board Cable Main P C Board Cabinet Body Screws 2 6 14 B 6 4 Operational P C Board Clear Grille Screws 2 6 8 C 4 Operational P C Board 12 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 13: ...et Shown in Fig To Remove Remove 5 Cabinet Cover Screws 2 10 D 2 6 Follow the procedure 7 Main P C Board Screw 2 10 E 1 Screws 2 10 F 2 Tapes and Solders Main P C Board 13 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 14: ...5 3 Charger Unit Shown in Fig To Remove Remove 8 Cabinet Cover Screws 2 6 10 G 2 9 Main P C Board Solders Main P C Board 14 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 15: ...6 HOW TO REPLACE THE HANDSET LCD 15 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 16: ...P 19 Check Handset Transmission P 23 Check Handset Reception P 23 SIGNAL ROUTE P 51 Check Caller ID P 23 Check Base Speakerphone Transmission P 23 Check Base Speakerphone Reception P 23 Check TAM Operation P 24 7 TROUBLESHOOTING FLOWCHART Flow Chart 16 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 17: ...it Is the AC Adaptor inserted into AC outlet Check AC Adaptor s specification Cross Reference Power Supply Circuit P 46 7 1 2 Handset Cross Reference Power Supply Circuit Reset Circuit P 49 17 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 18: ...harge 7 2 1 Base Unit Cross Reference Charge Circuit P 49 7 2 2 Handset Cross Reference Check Power P 17 Charge Circuit P 49 7 2 3 Charger Unit Cross Reference Charge Circuit P 49 18 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 19: ...7 3 Check Link 7 3 1 Base Unit Cross Reference Power Supply Circuit P 46 Check Point Base Unit P 25 19 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 20: ...Cross Reference Check Point Base Unit P 25 20 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 21: ...7 3 2 Handset Cross Reference Power Supply Circuit Reset Circuit P 49 Check Point Handset P 34 21 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 22: ...Cross Reference Check Point Handset P 34 22 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 23: ...nce HOW TO CHECK THE SPEAKER OR RECEIVER P 43 SIGNAL ROUTE P 51 7 6 Check Caller ID Cross Reference SIGNAL ROUTE P 51 7 7 Check Base Speakerphone Transmission Cross Reference SIGNAL ROUTE P 51 7 8 Check Base Speakerphone Reception Cross Reference SIGNAL ROUTE P 51 23 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 24: ...Unit 7 9 2 Handset Cross Reference Telephone Line Interface P 47 Check Link P 19 HOW TO CHECK THE SPEAKER OR RECEIVER P 43 7 10 Check TAM Operation Cross Reference Power Supply Circuit P 46 24 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 25: ...tions of adjustment equipments are as shown in Adjustment Standard Base Unit P 32 Items Check Point Procedure Check or Replace Parts A 2 5V Supply Confirmation VDD4 1 Confirm that the voltage between test point VDD4 and GND is 2 5V 0 2V D1 IC11 C4 C7 R10 R11 C30 C26 C28 L12 B 3 0V Supply Confirmation VDD3 1 Confirm that the voltage between test point VDD3 and GND is 3 0V 0 2V C2 IC1 C3 C8 Q2 R5 C1...

Page 26: ...Hz is 8 2dBm 4 Execute the command dtmf_lo 5 Confirm that the low frequency 852Hz is 10 2dBm IC4 R63 R39 C41 R49 C46 C47 R42 R43 R44 R45 R46 R47 R48 C108 C109 C40 C36 Q8 D4 I Transmitted Power Confirmation Remove L4 before starting step from 1 to 7 1 Configure the DECT tester CMD60 as follows Setting Test mode FP Traffic Carrier 5 Traffic Slot 4 Mode Loopback PMID 00000 RF LEVEL 70dBm 2 Execute th...

Page 27: ...equency drift is 30kHz ms IC2 IC4 R137 R125 C153 L8 L5 L10 L9 C140 C141 DA1 C142 C143 C144 L3 L4 R118 R119 L12 C30 IC11 R10 R11 C28 C26 C147 C151 C157 R123 C158 R128 R129 C159 C160 R131 R130 C161 C162 R132 C164 C136 R134 R117 R127 C156 C154 C155 R135 R136 M Sensitivity Receiver Confirmation Follow steps 1 to 6 of I 7 Set DECT tester power to 88dBm 8 Confirm that the BER is 1000ppm IC2 IC4 R137 R12...

Page 28: ... readrssi 8 Confirm that the returned value is 22 A hex IC2 IC4 R137 R125 C153 L8 L5 L10 L9 C140 C141 DA1 C142 C143 C144 L3 L4 R118 R119 L12 C30 IC11 R10 R11 C28 C26 C147 C151 C157 R123 C158 R128 R129 C159 C160 R131 R130 C161 C162 R132 C164 C136 R134 R117 R127 C156 C154 C155 R135 R136 P Power RAMP Confirmation Follow steps 1 to 6 of I 7 Confirm that Power RAMP is matching IC2 IC4 R137 R125 C153 L8...

Page 29: ...e interface SP Phone volume Maximum 4 Measure the output level and distortion level at base speaker 5 Confirm that the level is 3dBm 5dBm and that the distortion level is 5 6 Press MUTE button 7 Input 45dBm 1kHz to SP Phone MIC TP1 TP2 8 Measure the output level and distortion level at line interface 9 Confirm that the level is 0dBm 5dBm and that the distortion level is 5 IC4 IC7 D311 R375 C312 C3...

Page 30: ...s in DOS mode Batch file CD ROM for setting PQZZTG1840AL Note If you have the JIG Cable for TCD500 series PQZZ1CD505E change the following values of resistance Then you can use it as a JIG Cable for both TCD300 and TCD500 series It is an upper compatible JIG Cable Resistor Old value kΩ New value kΩ R2 22 3 3 R3 22 3 3 R4 22 4 7 R7 4 7 10 8 2 2 PC Setting 8 2 2 1 Connections 1 Connect the AC adapto...

Page 31: ...EEPROM Type rdeeprom 00 00 FF and the data from address 00 00 to FF is read out readid Read ID RFPI Type readid and the registered ID is read out writeid Write ID RFPI Type writeid 00 18 E0 0E 98 and the ID 0018 E0 0E 98 is written setfreq Adjust Frequency of RFIC Type setfreq nn hookoff Off hook mode on Base Type hookoff hookon On hook mode on Base Type hookon getchk Read checksum Type getchk wre...

Page 32: ... DC POWER 6V Dummy Handset DECT Tester CMD60 I J K L M N O P ANT L1T L1R LINE_DC DCM DCM DCP GND GND DCM CLK CN4 VDD5 VDD4 VDD3 VDD2 CN3 CHARGE CHARGE Digital Volt Meter Frequency Counter F S R TP5 RX TP1 10uF TP2 TP3 GND TP4 TX BELL Simulator LOOP Simulator AF OSC AF OSC AF VOLT METER G Q H AF VOLT METER OSCILLOSCOPE Digital Volt Meter Call ID Simulator DTMF Tester OSC AF VOLT METER OSC 600 12 2W...

Page 33: ...up the solder of TP The connection of adjustment equipment is as shown in Adjustment Standard Charger Unit P 33 8 5 Adjustment Standard Charger Unit When connecting the Simulator Equipments for checking please refer to below 8 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 to...

Page 34: ...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 5V...

Page 35: ...nd wreeprom 00 05 01 ZZ EEPROM 000A Low Voltage BL write YY 06 Execute the command wreeprom 00 0A 01 WW Note ZZ YY 1D WW 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 t...

Page 36: ...he 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 1C 8 hex 7 Set DECT tester power to 63dBm 8 Execute the command readrssi 9 Confirm that the returned value is 25 8 hex IC1 R54 C62 C123 C60 C6...

Page 37: ...en the customer s telephone line corresponds to the following conditions and transmission signal of SP Phone is interrupted performing the next set up to a cordless handset will improve it to some extent Conditions 1 When customer s line has less 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 sign...

Page 38: ...G Cable PQZZ1CD300E PC which runs in DOS mode Batch file CD ROM for setting PQZZTG1840AL Note If you have the JIG Cable for TCD500 series PQZZ1CD505E change the following values of resistance Then you can use it as a JIG Cable for both TCD300 and TCD500 series It is an upper compatible JIG Cable Resistor Old value kΩ New value kΩ R2 22 3 3 R3 22 3 3 R4 22 4 7 R7 4 7 10 9 3 2 PC Setting 9 3 2 1 Con...

Page 39: ...nction Example rdeeprom Read the data of EEPROM Type rdeeprom 00 00 FF and the data from address 00 00 to FF is read out readid Read ID RFPI Type readid and the registered ID is read out writeid Write ID RFPI Type writeid 00 18 E0 0E 98 and the ID 0018 E0 0E 98 is written setfreq Adjust Frequency of RFIC Type setfreq nn getchk Read checksum Type getchk wreeprom Write the data of EEPROM Type wreepr...

Page 40: ...2 SP_TEST1 REV_TEST1 REV_TEST2 SP_TEST2 C60 C59 C123 C64 C61 C65 C44 C62 CLK C63 D1 R93 C119 R6 R47 R46 R86 R25 R29 C10 C101 C107 C108 C111 C112 F1 J1 C3 R1 R83 R43 C98 L9 L7 L6 C95 C78 C79 VDD3 D7 D6 D9 Q8 D10 C40 R5 L5 L4 R74 C80 R36 C76 C16 C92 R80 C13 C83 C69 C70 C81 C86 C15 R35 R67 R66 C14 R34 C75 C38 C77 R61 R71 R40 R39 R64 D5 D8 D4 R60 JTAG R97 R63 VDD1 VDD2 POWER R91 C93 C41 C4 C94 C22 C72...

Page 41: ...nd PC P 30 2 Refer to Check Point Base Unit P 25 10 2 Handset Before doing the following adjustment be sure to do PC Setting P 38 in The Setting Method of JIG 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 ...

Page 42: ...P Power RAMP is matching Check Point Base Unit P Refer to Check Point Base Unit P 25 11 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 Ac...

Page 43: ... 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 Cha...

Page 44: ...13 12 20 21 XTAL X1 10 368 MHz EEPROM IC3 SCL SDA 66 67 Flash Memory TAM IC6 RESET CS SCK SI 83 80 79 10 SO 94 To AC Adaptor CN1 Limit Resistor Charge Contacts 2 5V 4 0V Reg IC1 3 0V Reg Q2 1 8V Reg Q3 4 0V 3 0V 1 8V SP AMP IC7 110 SP MIC 118 2 5V Reg IC11 Key Matrix 58 61 62 63 15 42 50 51 52 53 54 13 3 0V IN USE LED 2AP PCB 74VHC574 D_FF IC9 74VHC574 D_FF IC10 3 0V ANS LED LCD 85 86 87 88 89 90 ...

Page 45: ...detone 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 FLASH MEMORY IC6 Voice Pr...

Page 46: ...2 6V D1 IC1 Q2 IC4 3 0V CN2 6V D1 IC1 Q3 IC4 1 8V RF Module IC2 CN2 6V D1 IC11 IC2 2 5V EEPROM IC3 CN2 6V D1 IC1 Q2 IC3 3 0V FLASH MEMORY IC8 CN2 6V D1 IC1 Q2 IC8 3 0V SP AMP IC7 CN2 6V D1 IC1 IC7 4 0V TAM FLASH MEMORY IC6 CN2 6V D1 IC1 Q2 IC6 3 0V LOGIC IC IC9 IC10 CN2 6V D1 IC1 Q2 IC9 IC10 3 0V Charge Contact TP15 CN2 6V D1 R2 R4 TP15 Fig 101 46 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 47: ...er Block The voice signal input from the TEL LINE interface goes to RF Module IC2 through DECT BBIC IC4 as shown in BLOCK DIAGRAM BASE UNIT P 44 The voice signal passes through the analog part of IC4 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 t...

Page 48: ... Analog 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 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 ...

Page 49: ...he 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 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 46 17 4 Battery Low Power Down Detector Circuit Operation B...

Page 50: ...18 CIRCUIT OPERATION CHARGER UNIT 18 1 Power Supply Circuit The power supply is as shown 50 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 51: ...19 SIGNAL ROUTE 51 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 52: ...52 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 53: ...I 28 TXDA A O TXDA O Hi Z 29 AD15 D O AD15 O Hi 30 AD16 D O AD16 O Hi 31 AD17 D O AD17 O Hi 32 AD18 D O AD18 O Hi 33 AD19 D O NC O Hi 34 AD20 D O NC O Hi 35 AD21 D O NC O Hi 36 AD22 D O NC O Hi 37 AD23 D O NC O Hi 38 LE D O LE O Low 39 SO D O SO O Low 40 SK D O SK O Hi Z 41 ADC2 A I ADC2 I I 42 KEY_OUT5 D O key_strobe O Hi Z 43 RDN D O RDN O Hi 44 WRN D O WRN O Hi 45 MI READY D O NC O I 46 SCLK D ...

Page 54: ...6 I O I 90 DAB14 D I O DAB14 I O I 91 DAB7 D I O DAB7 I O I 92 DAB15 D I O DAB15 I O I 93 TM D I TM I Low 94 SI D O SI O Hi Z 95 PON A I PON I I 96 LINE_SEIZURE D I O nHOOK I O I 97 RLY D O RLY O Low 98 RINGING A I RINGING I I 99 LINEREF A O LINEREF O 100 LINEOUT A O LINEOUT O 101 LINE_IN A I LINE_IN I 102 LINE_IN A I LINE_IN I 103 LDO1_Senes A I LDO1_Senes I I 104 LDO1_CTRL A O LDO1_CTRL O Hi 105...

Page 55: ...Pin No Description I O Connection at Normal mode at Reset mode 127 AD6 D O AD6 O Hi 128 AD7 D O AD7 O Hi 55 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 56: ...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 57: ...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 57 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 58: ...22 ENGINEERING MODE 22 1 Base Unit 58 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 59: ...hen you enter the address please refer to the table below Desired Number hex Input Keys Desired Number hex Input Keys 0 0 A R 0 1 1 B R 1 C R 2 D R 3 E R 4 9 9 F R 5 59 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 60: ...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 serious damage to the computer system ID 00 10 00 14 Given value Bell length 01 F6 32 5sec 1 1E 3sec 14 2sec This is time until bell stops ringing Unit 100ms 1 Bell length 32 hex 50 dec 50 100msec 5000msec 5sec 2 Items Description C ID FSK sensitivit...

Page 61: ...22 2 Handset 61 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 62: ...ossible 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 handset 4 Items Description Sending level Analog Front End MIC Sett...

Page 63: ... Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free P 4 23 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 64: ...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 23 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 64 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 65: ...24 CABINET AND ELECTRICAL PARTS BASE UNIT 65 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 66: ...eable Ni MH battery HHR 4EPT is available through sales route of Panasonic 2 This cable is fixed by welding Refer to HOW TO REPLACE THE HANDSET LCD P 15 3 Attach the spacer No 122 to the exact location described above 66 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 67: ...26 CABINET AND ELECTRICAL PARTS CHARGER UNIT 67 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 68: ...27 ACCESSORIES AND PACKING MATERIALS 27 1 KX TG1843ALS 68 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 69: ...27 2 KX TGA121AZS 69 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 70: ...28 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 28 1 Base Unit 28 2 Handset 70 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 71: ...28 3 Charger Unit 71 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 72: ...KER 13 PQHR11082Z GUIDE SPEAKER POM HB 14 PQGG10294Y1 GRILLE CLEAR PC HB 15 PQKM10685Y1 CABINET BODY PS HB 16 PQJT10218Y CHARGE TERMINAL R 17 PQJT10219Y CHARGE TERMINAL L 18 PQKE10384Z3 HOLDER CHARGE TERMINAL R POM HB 19 PQKE10385Z3 HOLDER CHARGE TERMINAL L POM HB 20 PQHR11126Z CASE CHARGE TERMINAL 21 PQSA10164Z ANTENNA L 22 PQSA10165Z ANTENNA R 23 PQMG10025Z RUBBER PARTS MIC 24 PQKF10676Z1 CABINE...

Page 73: ...R56 ERJ3GEYJ103 10K R57 ERJ3GEYJ103 10K R61 ERJ2GEJ181 180 R62 ERJ2GEJ102 1K R64 ERJ2GEJ684 680K R65 ERJ2GEJ103 10K R69 ERJ3GEYJ104 100K R70 ERJ3GEYJ104 100K Ref No Part No Part Name Description Remarks R71 ERJ3GEYJ104 100K R72 ERJ3GEYJ474 470K R73 ERJ3GEYJ101 100 R74 ERJ3GEYJ102 1K R75 ERJ3GEYJ101 100 R76 ERJ3GEYJ102 1K R77 ERJ3GEYJ103 10K R79 ERJ3GEYJ681 680 R80 PQ4R18XJ100 10 S R82 ERJ3GEYJ103 ...

Page 74: ...Ref No Part No Part Name Description Remarks C88 ECUV1H101JCV 100P C89 ECUV1H101JCV 100P C90 ECUV1H101JCV 100P C101 ECUV1H102KBV 0 001 C102 ECUV1H102KBV 0 001 C103 ECUV1C104KBV 0 1 C104 ECUV1H391JCV 390P C106 ECUV1C104KBV 0 1 C107 ECUV1C104KBV 0 1 C108 PQCUV1A225KB 2 2 C109 PQCUV1A105KB 1 C130 ECUV1H100DCV 10P C136 ECUE1H102KBQ 0 001 S C140 ECUV1H060DCV 6P S C141 ECUV1H060DCV 6P S C142 ECUV1H100DC...

Page 75: ...When replacing the Handset LCD see HOW TO REPLACE THE HANDSET LCD P 15 Ref No Part No Part Name Description Remarks PCB100 PQWPG1840ALR MAIN P C BOARD ASS Y RTL for KX TG1843ALS PCB100 PQWPGA122AZR MAIN P C BOARD ASS Y RTL for KX TGA121AZS ICs IC1 C1CB00002038 IC BBIC 1 Ref No Part No Part Name Description Remarks IC3 PQWIA130EXRR IC EEPROM 1 TRANSISTORS Q1 PQVTFDN335N TRANSISTOR SI S Q2 B1ADGE000...

Page 76: ...rt No Part Name Description Remarks C103 ECUV1H100DCV 10P C104 ECUV1A105KBV 1 C107 ECUV1H101JCV 100P C108 ECUE1H100DCQ 10P S C109 ECUE1H100DCQ 10P S C111 ECUE1H101JCQ 100P S C112 ECUE1H101JCQ 100P S C113 ECUV1H101JCV 100P C114 ECUE1H100DCQ 10P S C115 ECUE1H100DCQ 10P S C116 ECUE1H100DCQ 10P S C117 ECUE1H100DCQ 10P S C118 ECUV1H103KBV 0 01 C119 F1G1A1040003 0 1 C120 F1G1A1040003 0 1 C121 ECUV1H102K...

Page 77: ...USHION 29 4 2 KX TGA121AZS Ref No Part No Part Name Description Remarks A1 PQLV200ALX AC ADAPTOR A2 PQQX14630Z INSTRUCTION BOOK 1 P1 PQPP10086Z PROTECTION COVER for Charger Unit P2 PQPP10084Z PROTECTION COVER for Handset P3 PQPK14672Z GIFT BOX 29 5 Fixtures and Tools Note 1 See The Setting Method of JIG Base Unit P 30 and The Setting Method of JIG Handset P 38 2 When replacing the Handset LCD see ...

Page 78: ...Memo 78 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 79: ...RAM 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 30 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...

Page 80: ...20 C312 D10p 1 CD 2 Vref 3 Vin 4 Vin 5 Vout1 6 V 7 GND 8 Vout2 100 R312 D311 470 R306 K0 1u C306 C170 NC R105 10K R18 F5 6K R19 F2 4K K0 1u C69 220 R10 220 R11 SA2 C207 NC 1005 C206 NC 1005 C203 NC C29 NC C199 NC C130 D10p C119 NC 2125 C114 NC 1005 NC R313 C173 D10p DCP DCM L2R L2T L1R L1T LINE_DC TP9 C182 K1000p 22 R4 6332 C181 D10p NC R3 6332 D6 22V C180 D10p R85 0 R86 0 NC R84 NC R83 NC D11 NC ...

Page 81: ...LK D10p C158 1005 D7p C157 1005 R122 NC 1005 R123 0 1005 TP10 CN6 1 KEY_INT0 2 KEY_INT1 3 KEY_INT2 4 KEY_INT3 5 KEY_INT4 6 KEY_OUT1 7 KEY_OUT2 8 KEY_OUT3 9 KEY_OUT4 10 KEY_OUT5 11 KEY_OUT6 12 SP_LED 13 INUSE_LED 14 NC 15 1APVCC 16 GND 17 ANS_LED 18 NC 19 SEG5 20 SEG6 21 SEG7 22 SEG8 23 SEG9 24 SEG10 25 COM1 26 COM2 27 SEG1 28 SEG2 29 SEG3 30 SEG4 D18 NC R129 1K 1005 R131 1K 1005 R134 4 7K 1005 R13...

Page 82: ... 1 KEY_INT0 2 KEY_INT1 3 KEY_INT2 4 KEY_INT3 5 KEY_OUT0 6 KEY_OUT1 7 KEY_OUT2 8 KEY_OUT3 9 KEY_OUT4 10 KEY_OUT5 11 KEY_OUT6 12 LED0 13 LED1 14 NC 15 2APVCC 16 GND 17 ANS_LED 18 NC 19 SEG5 20 SEG6 21 SEG7 22 SEG8 23 SEG9 24 SEG10 25 COM1 26 COM2 27 SEG1 28 SEG2 29 SEG3 30 SEG4 R901 560 R902 82 R903 180 Q903 Q902 Q901 TCD340_240 only KX TG1843 SCHEMATIC DIAGRAM Base Unit_Operation NC No Components 8...

Page 83: ...Memo 83 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 84: ...REEN 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 R43 0 1R 0 1W 2125 D7 MA2Z72000L Q5 TP21 L1 47uH Q4 BC807 40 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 J1 1 BATTERY R72 1K 1...

Page 85: ... 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 D8 NC D10 C14 NC C15 ...

Page 86: ...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 86 KX TG1843ALS KX TGA122AZS KX TGA121AZS ...

Page 87: ... R365 R374 R90 P2_4 P3_6 P1_0 P2_7 P3_0 R89 R88 R98 R76 R77 R82 R92 R91 R74 R73 P2_0 P2_6 P2_1 P3_7 P3_5 P3_1 P3_2 P3_4 48 25 P3_3 P1_5 P1_3 ACSO P1_4 P1_2 P1_1 P0_3 P0_4 P0_5 P0_6 P0_7 R366 R123 R122 R3 R4 R2 R137 R125 R136 R130 R135 R128 R129 C314 C321 C367 C320 C363 R311 R313 R314 R308 R134 R131 R132 R133 R312 R362 R93 R372 R371 R373 R146 R126 R127 R375 R11 R10 R121 RLY8 RLY9 RLY7 RLY10 RLY1 R3...

Page 88: ..._2 CLK CN3 YELLOW SP CN4 A BLACK RED CHARGE VDD4 GND PbF PQUP11280Z TP3 TX TP4 RX TP5 TP2 TP1 MIC D C M W B L U E L2T L1T L1R KX TG1843 CIRCUIT BOARD Base Unit_Main Flow Solder Side View CLK 10 368MHz VDD4 2 5V VDD2 4 0V VDD5 1 8V VDD3 3 0V KX TG1843ALS KX TGA122AZS KX TGA121AZS 88 ...

Page 89: ... ERASE LEFT UP RIGHT PLAYBACK ANSWER PAGE 3 2 12 6 5 9 8 0 1 1 30 1 CN901 4 7 MUTE REDIAL RECALL DOWN LED903 LED902 LED901 A SP_PHONE R901 Q901 R902 Q902 R903 Q903 PQUP11334Z KX TG1843 CIRCUIT BOARD Base Unit_Operation Component View KX TG1843ALS KX TGA122AZS KX TGA121AZS 89 ...

Page 90: ...36 2 Flow Solder Side View KX TG1843 CIRCUIT BOARD Base Unit_Operation Flow Solder Side View A PbF W1 PQUP11334Z KX TG1843ALS KX TGA122AZS KX TGA121AZS 90 ...

Page 91: ...7 R66 C14 R34 C75 C38 C77 R61 R71 R40 R39 R64 D5 D8 D4 R60 JTAG R97 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 B 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 ...

Page 92: ...P 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 TGA122 121 CIRCUIT BOARD HANDSET Flow Solder Side View KX TG1843ALS KX TGA122AZS KX TGA121AZS 92 ...

Page 93: ... CIRCUIT BOARD CHARGER UNIT Component View D1 A 38 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 93 KX TG1843ALS KX TGA122AZS KX TGA121AZS G S KXTG1843ALS KXTGA122AZS KXTGA121AZS ...

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