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Panasonic KX-TCD400HGB, Service Manual

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- Detector
- Compress/Expander
- First/Second Mixer
- Amplifier for transmission and reception
- EEPROM: IC1
- Temporary operating parameters (for RF, etc.)
- Additionally,
- Power Supply Circuit (+4.0V, +2.65V output)
- Crystal Circuit (10.368MHz)
- Charge Circuit
- Telephone Line Interface Circuit

21.2. Power Supply Circuit

The power is supplied to the DECT BBIC, RF Module, EEPROM, Relay Coil, LED and Charge
Contact from AC Adaptor (+6V) as shown in Fig.101. The power supply is as follows;

- DECT BBIC (IC2): J2(+6V)    D4    Q9    D5    Q8    IC2
- RF Module (IC3): J2(+6V)    D4    Q9    IC3
- EEPROM (IC1): J2(+6V)    D4    Q9    D5    Q8    IC2    IC1
- LED (LED1): J2(+6V)    D4    Q9    R68    LED1
- Charge Contact (TP84): J2(+6V)    D4    R43, R44    TP84

<Fig.101>

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Summary of Contents for KX-TCD400HGB

Page 1: ...6101C2 Telephone Equipment KX TCD400HGB KX TCD400HGC KX A140EXB KX A140EXC Digital Cordless Phone Black Version Dark Blue Version for Hungary SPECIFICATIONS 2003 Panasonic Communications Co Ltd All ri...

Page 2: ...precautions standard Pb solder can also be used Caution PbF solder has a melting point that is 50 F 70 F 30 C 40 C higher than Pb solder Please use a soldering iron with temperature control and adjus...

Page 3: ...ufac turer s specific instructions for the melting points of their products and any precautions for using their product with other materials The following lead free PbF solder wire sizes are recommend...

Page 4: ...ering 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 equiv...

Page 5: ...battery strength may not be indicated correctly if the battery is disconnected and connected again even after it is fully charged In that case by recharging the battery as mentioned above you will get...

Page 6: ...eplaced Charge new batteries for approximately 7 hours before initial use The telephone line cord must not be connected to the telephone socket at this time When replacing the batteries ensure that th...

Page 7: ...5 1 Base Unit 5 2 Handset 6 SETTINGS 6 1 Connection Plug in the AC adaptor and the telephone line cord in order 1 2 3 4 7...

Page 8: ...must remain connected at all times It is normal for the adaptor to feel warm during use Never install telephone wiring during a lightning storm 6 2 Symbols Used in This Service Manual 6 3 PIN Code 6 3...

Page 9: ...ice Hint If the current 4 digit PIN is forgotten press and you will be able to enter new PIN 6 3 2 Handset To exit the operation press any time For Service Hint If the current 4 digit PIN is forgotten...

Page 10: ...lead wire to GND SDA and SCLK on base PCB 2 Plug in AC adaptor to the base 3 Turn on the power to the JIG 9V 4 Then connect the cable to each pins using clip As for the connection between JIG and PCB...

Page 11: ...electable options Flash Timing 100 msec 600 100 msec Pause Timing 3 seconds 3 seconds 5 seconds 4 Digit Base Unit PIN 0000 Dialling Mode Tone Tone Pulse 6 4 2 Handset You can reset all of the handset...

Page 12: ...Handset PIN 0000 Auto Talk OFF OFF ON Redial Memory All Clear Handset Receiver Volume Medium Low Medium High 6 5 Key Lock You can lock the handset dialling buttons Only incoming calls are accepted wh...

Page 13: ...ess an outside line through a PBX Entering a pause prevents misdialling when you redial or dial a stored number Pressing REDIAL once creates one pause To extend the pause requirement time press REDIAL...

Page 14: ...it Handset PIN UP OK All handset setting will be reset to their initial settings however the Phonebook data will be saved 6 10 Select Dialling Mode Tone Pulse You can change the dialling mode to tone...

Page 15: ...er to Flash Time setting 6 12 Summary of Programmable Functions You can select and execute the following functions by pressing direct command as follows without programming These operations need to be...

Page 16: ...its place If the known working telephone still has problems then please contact the customer service department of your Network provider If it operates correctly then the problem is likely to be a fa...

Page 17: ...rence Power On Off Call BAR On Off Call Prohibition On Off Key Lock 8 OPERATIONS 8 1 Power On Off 1 When button is released the display changes to the standby mode 2 The display goes blank 8 2 Making...

Page 18: ...g a call 1 You can also answer a call by pressing any dialling button HOLD or 8 4 Setting the Clock Date After a mains power failure the clock needs to be reset Ensure that icon is not flashing To exi...

Page 19: ...press RIGHT or LEFT to move cursor then clear a character by pressing CLEAR and or enter characters Characters are cleared or added to the left of the flashing character To enter characters see Chara...

Page 20: ...left of the flashing digit If you need to clear or add more than one digit repeat the steps from 5 4 Characters are added to the left of the flashing character If you need to clear or add more than o...

Page 21: ...press any time 1 If there is no item stored in the redial caller list the display shows 2 If you need correction press RIGHT or LEFT to move cursor then clear a character by pressing CLEAR and or ent...

Page 22: ...o item stored in the phonebook the display shows 2 The number is flashing if the dialling button is already assigned as a hot key 3 Phonebook registration will be remained even hot key registration is...

Page 23: ...Shown in Fig To Remove Remove 1 Lower Cabinet Screws 2 6 12 A 2 2 Main P C Board Main P C Board 9 2 Handset 23...

Page 24: ...r 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 10 ASSEMBLY INSTRUCTIONS 10 1 Warning When Constructing the Base Unit 11 PROC...

Page 25: ...nu Down Right Down 5 times Right Then HSPIN CHANGE is displayed 2 Press Right Then OLD PIN _ _ _ _ is displayed 3 Press Handset PIN 0000 Then NEW PIN _ _ _ _ is displayed 4 Press 0163 Then VERIFY _ _...

Page 26: ...ecommended that you put SW device between A and B like KX TCD410 4 Press Right on Handset Then Handset starts to search Selected Base in registration mode 5 Press Base PIN 0000 after Handset display B...

Page 27: ...0F4E 0F is displayed 7 Press Right Then long beep sounds and E2 0F4E 0F is displayed Then all menus for multi Handset are available in Setting Base Unit 11 2 Register Handset to TCD400 Base Unit 11 2...

Page 28: ...t After registering new Handset you need to disable all multi Handset menu in Handset and Base Unit 11 3 1 Disabling Multi Handset Menu in Handset Register new Handset for TCD400 Base Unit according t...

Page 29: ...s Base Unit PIN 0000 Then 5 _ _ _ _ _ _ _ _ is displayed 3 Press 0163 3811 Then long beep sound and E is displayed 4 Press 2 Then E2 _ _ _ _ _ _ is displayed 5 Press 0 RECALL 5 4 RECALL 4 Then E2 0F4E...

Page 30: ...Reception Check Battery Charge Check Link Check Handset Transmission Check Handset Reception SIGNAL ROUTE 12 1 Check Power 12 1 1 Base Unit Is the AC Adaptor inserted into AC outlet Check AC Adaptor s...

Page 31: ...IC is IC2 12 1 2 Handset Cross Reference Power Supply Circuit Reset Circuit Note BBIC is IC1 12 2 Check Battery Charge 12 2 1 Base Unit Cross Reference Charge Circuit 12 2 2 Handset Cross Reference Ch...

Page 32: ...Note BBIC is IC1 12 3 Check Link 12 3 1 Base Unit Cross Reference Power Supply Circuit Adjustment 12 3 2 Handset 32...

Page 33: ...ence Power Supply Circuit Adjustment 12 4 Check Handset Transmission Cross Reference SIGNAL ROUTE 12 5 Check Handset Reception Cross Reference HOW TO CHECK THE HANDSET SPEAKER SIGNAL ROUTE 12 6 Bell R...

Page 34: ...n 13 1 1 Equipment Required DECT tester Rohde Schwarz CMD 60 is recommended Frequency counter it must be precise to be able to measure 1Hz precision 4ppm Hewlett Packard 53131A is recommended DC power...

Page 35: ...atch file for setting PQZZTCD410E 13 2 PC Setting 13 2 1 Connections 13 2 2 PC Setting 1 Open a window of MS DOS mode from the start up menu 2 Change a directory to the one with RTX_COM contained 3 Ty...

Page 36: ...ss and 45 is data to be written InitBsPIN bat Initial Base PIN to 0000 Type initBsPIN 14 CHECK PROCEDURE HANDSET 14 1 Preparation 14 1 1 Equipment Required DECT tester Rohde Schwarz CMD 60 is recommen...

Page 37: ...e 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...

Page 38: ...eption sensitivity of base unit is low with noise Make confirmation in item The transmit level is high or low Make adjustments in item The reception level is high or low Make adjustments in item The u...

Page 39: ...32 E BBIC Clock Adjustment TP1 1 Execute the command deactmac 2 Execute the command conttx 3 Input Command rdeeprom_00_00_02 then you can confirm the current value 4 Adjust the frequency of TP1 execut...

Page 40: ...IC2 R32 C2 R23 C80 C1 C13 Q6 R2 R21 R19 R2 C12 D2 C1 C2 R77 D3 R12 Q2 R7 R8 R9 R10 H Transmitted Power Confirmation Remove the Antenna before starting step from 1 to 4 1 Configure the DECT tester CMD6...

Page 41: ...Adjust the B Field Modulation if required Execute the command readmod and wrtmod xx where xx is the value IC2 IC3 L1 C43 C78 C7 C69 C48 C7 C66 C67 C7 C57 C73 L3 DA1 R66 R6 C55 C56 R7 R79 C54 C5 J Fre...

Page 42: ...ower to 88dBm 5 Confirm that the BER is 1000ppm IC2 IC3 L1 C43 C78 C7 C69 C48 C7 C66 C67 C7 C57 C73 L3 DA1 R66 R6 C55 C56 R7 R79 C54 C5 L Timing Confirmation Follow steps 1 to 3 of H above 4 Confirm t...

Page 43: ...SI Level Confirmation Follow steps 1 to 3 of H above 4 Set DECT tester power to 88dBm 5 Execute the command readrssi 6 Confirm 29 returned value 3E hex IC2 IC3 L1 C43 C78 C7 C69 C48 C7 C66 C67 C7 C57...

Page 44: ...40mA 8 Connect DECT tester to Tel simulator 9 Input audio signal 200mVrms 1kHz tone to Tel simulator DECT tester setting Scramble On AF Gen to ADPCM Off AF Meter Input ADPCM AF Gen Frequency 1000Hz A...

Page 45: ...AF Gen Level 30mVrms 9 Confirm hearing tone 790mVrms 160mVrms 10 Adjust audio level if required Make sure current value using getspkrgain And then execute the command setspkrgain xx where xx is the va...

Page 46: ...se unit Make adjustments in item H J N The handset does not transmit or the transmit frequency is off Make adjustments in item H K M The transmit frequency is off Make confirmation in item H K M The t...

Page 47: ...1V 0 2V IC1 F1 R21 R4 C33 L2 D1 C15 C2 C14 Q1 R3 R2 D2 R22 C26 X1 C16 B VBACK Status Confirmation 1 Confirm that the voltage between TP18 and GND is 0V 0 4V IC1 F1 R21 R4 C33 L2 D1 C15 C2 C14 Q1 R3 R2...

Page 48: ...F Battery Monitor Confirmation 1 Apply 2 3V 0 005V between TP3 and TP4 2 Execute the command readbatt 3 Confirm 98 returned value A8 Hex 4 Execute the command WRTBAT2 XX XX returned value 06 Hex IC1...

Page 49: ...TP value at A201 TP15 is 20dBm 25dBm IC1 IC3 C54 C66 C60 L3 C57 C55 C5 C62 R23 R2 C63 C64 C6 J Modulatoin Check and Adjusment TP15 Follow steps 1 to 4 of I above 5 Confirm that the B Field Modulation...

Page 50: ...5 C62 R23 R2 C63 C64 C6 M Timing Confirmation Follow steps 1 to 4 of I above 5 Confirm that the Timing accuracy is 10ppm IC1 IC3 C54 C66 C60 L3 C57 C55 C5 C62 R23 R2 C63 C64 C6 N RSSI Level Confirmati...

Page 51: ...Check and Confirmation TP15 1 Configure the DECT tester CMD60 as follows Setting Test mode FP Mode Normal RFPI 0102030405 2 Execute the command testmode 3 Execute the command regcmd60 4 Initiate conne...

Page 52: ...l 0x34 hex A hex Adjustment M Refer to Adjustment 17 2 Handset Item Value Refer to Remarks TX Power More than 20 dBm 25 dBm Adjustment I Modulation 340 kHz div 402 kHz div Adjustment J Data type Fig31...

Page 53: ...19 FREQUENCY TABLE MHz 53...

Page 54: ...nd Handset 20 BLOCK DIAGRAM BASE UNIT 21 CIRCUIT OPERATION BASE UNIT 21 1 Outline Base Unit consists of the following ICs as shown in BLOCK DIAGRAM BASE UNIT DECT BBIC Base Band IC IC2 Handling all th...

Page 55: ...Charge Circuit Telephone Line Interface Circuit 21 2 Power Supply Circuit The power is supplied to the DECT BBIC RF Module EEPROM Relay Coil LED and Charge Contact from AC Adaptor 6V as shown in Fig 1...

Page 56: ...d as follows A C4 R2 R29 IC2 DLP BELL B C3 R1 R30 IC2 DLP BELL ON OFF hook circuit In the standby mode Q2 is open and connected as to cut the DC loop current and to cut the voice signal The unit is co...

Page 57: ...detects the voice signal or data signal in the circuit same as the following explanation of Receiver Block 21 4 2 Receiver Block The signal of 19 2 MHz band 18 81792 MHz 18 97344 MHz which is input fr...

Page 58: ...ge Circuit Circuit Operation When charging the handset on the Base Unit the charge current is as follows DC 5 5V 6V D4 R43 R44 CHARGE Base CHARGE Handset L4 Q2 F1 BATTERY Battery BATTERY R21 GND L5 CH...

Page 59: ...The BBIC detects this level and power down 24 SIGNAL ROUTE 25 CPU DATA BASE UNIT 25 1 IC2 BBIC 59...

Page 60: ...I 18 XTAL A I 10 368 MHz 19 VDDLR A I 20 LRB A I 21 VDDA 22 VSSA 23 Audio_Out_N A O 24 Audio_Out_P A O 25 Bandgap_Ref A I 26 Differential_Line_P A I for Bell Clip 27 Differential_Line_N A I for Bell...

Page 61: ...Fixed 53 VSS 54 VDD 55 KEY_IN D I No Key Key 56 NO USE D I O I_PD 57 PULSE_CTRL D I O Q7_ON Q7_OFF 58 NO USE D I O I_PD 59 NO USE D I O I_PD 60 NO USE D I O I_PD 61 HOOK_CTRL D O Make Break 62 NO USE...

Page 62: ...ctive 15 SYCL D O Active 16 TX_DATA A O Active 17 KEY_IN D I No Key 18 KEY_IN D I No Key 19 KEY_IN D I No Key 20 KEY_IN D I No Key 21 KEY_IN D I No Key 22 NO USE D O 23 Reference clock D O Active 24 V...

Page 63: ...45 MICP A I 63...

Page 64: ...Active 62 LCD_SEGMENT D O Active 63 VDD 64 VSS 65 VDD for EEPROM D O 66 I2DAT D I O Active 67 I2CLK D I O Active 68 MODE D I 69 R2 D I 70 NO USE D O 71 VBACK P0 7 D I 72 LCD_SEGMENT D O Active 73 LCD...

Page 65: ...ction The base unit uses a 32K bit serial EEPROM IC1 for storing volatile parameters All parameters are set up before the base leaves the factory Some of these are vital for the operation of the hardw...

Page 66: ...ID for H S 1 x D Ipui for handset 1 If set to FF 5bytes the handset is not enrolled 004E 008F Reserved x Protocol data 0090 009F UAK_1 x UAK for hanset 1 for factory use 27 3 2 Switch Control Address...

Page 67: ...defaultst to 700 ms 27 3 4 Clip Caller ID configuration Address Default Name Country Setting Type Description 0F1C 70 Detect 02 D Clip Detect Configuration 27 3 5 BsUiTask settings Address Default Na...

Page 68: ...software and user specific parameters Some parameters are set during production of the handset e g crystal oscillator adjustment at 0000 01 some are set by the user when configuring the handset e g ri...

Page 69: ...PEI 0036 003A FF PARK_1 ID for Base 1 PARK for registration 1 004A FF PLI_1 D Pli for registration 1 If set to FF the registration is deleted 28 3 2 Signal detection for factory use only Address Defau...

Page 70: ...6 Hungarian 07 Portuguese 08 Polish 09 Command 0A German 28 3 3 Battery Parameters Address Default Name Type Description 0F04 9A LowVoltage A Voltage on which to start battery low indication The volta...

Page 71: ...ing Second Block Address Default Name Country Setting Type Description 0F53 FF Menu Config 20 D bit 0 Registration menu on off 1 0 bit 1 Select base menu on off 1 0 bit 2 Internal ringer menu on off b...

Page 72: ...B by temporarily soldering two diagonally opposite pins in the correct positions on the PCB Be certain each pin is located over the correct pad on the PCB 2 Apply flux to all of the pins on the IC 3 B...

Page 73: ...amount of solder to the bridged pins 2 With a hot iron use a sweeping motion along the flat part of the pin to draw the solder from between the adjacent pads 30 CABINET AND ELECTRICAL PARTS LOCATION...

Page 74: ...74...

Page 75: ...31 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 32 ACCESSORIES AND PACKING MATERIALS 75...

Page 76: ...33 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 33 1 Base Unit 33 2 Handset 76...

Page 77: ...he assembly will no longer be available 2 Important safety notice Components identified by the mark indicates special characteristics important for safety When replacing any of these components only u...

Page 78: ...SA10132Z ANTENNA SUB 8 PQYF10560Z2 CABINET COVER ABS HB 34 1 2 Main P C Board Parts Ref No Part No Part Name Description Remarks PCB1 PQWP1D400HGH MAIN P C BOARD ASS Y RTL ICs IC1 PQWI1D400HGH IC IC2...

Page 79: ...22 ERJ3GEYJ333 33K R23 ERJ3GEYJ560 56 R24 PQ4R18XJ100 10 S R25 ERJ3GEYJ151 150 R26 ERJ3GEYJ103 10K R27 ERJ3GEYJ222 2 2K R28 ERJ3GEYJ751 750 R29 ERJ3GEYJ101 100 R30 ERJ3GEYJ101 100 R31 ERJ3GEYJ101 100...

Page 80: ...7 ECUV1C104KBV 0 1 C28 ECUV1C683KBV 0 068 C29 ECUV1C683KBV 0 068 C30 ECUV1H182KBV 0 0018 C32 ECUV1H270JCV 27P C33 ECUV1H1R0CCV 1 C34 ECUV1C104KBV 0 1 C35 ECUV1H333KBV 0 033 S C36 ECUV1C104KBV 0 1 C37...

Page 81: ...0224S KEYBOARD SWITCH 20KEY for KX TCD400HGC 107 PQHS10467Z COVER SP NET 108 L0AD02A00016 SPEAKER 109 PQSA10133Z ANTENNA 110 PQJT10204Z TERMINAL L 111 PQJT10205Z TERMINAL R 112 PQHX11202Z INSULATOR 11...

Page 82: ...5N6K COIL S RESISTORS R1 ERJ3GEYJ222 2 2K R2 ERJ8BQJR30 0 3 R3 ERJ3GEYJ560 56 R4 ERJ3GEYJ103 10K R5 ERJ3GEYJ331 330 R6 ERJ3GEYJ332 3 3K R7 ERJ3GEYJ331 330 R8 ERJ3GEYJ331 330 R11 ERJ3GEY0R00 0 R17 ERJ3...

Page 83: ...1H020CCV 2P OTHERS E101 L0CBAB000052 MICROPHONE IC3 J3FKK0000003 RF UNIT X1 H0D103500002 CRYSTAL OSCILLATOR 34 3 Accessories and Packing Materials Ref No Part No Part Name Description Remarks A1 PQLV2...

Page 84: ...NIT 36 SCHEMATIC DIAGRAM HANDSET 36 1 Memo 37 CIRCUIT BOARD BASE UNIT 37 1 Component View 37 2 Flow Solder Side View 38 CIRCUIT BOARD HANDSET 38 1 Component View 38 2 Flow Solder Side View M KXTCD400H...

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