Panasonic KX-TC2101BXB Page 21 Service Manual Download

Page: 21 / 63

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R446

Q309

Q104

Q405

Q403

R227

R228

R224

C203

R222

R223

R221

GND2

R229

C201

C208

C202

C437

C433

C432

C434

C419

C423

C416

IFOUT

IFGND

C415

C414

C412

C408

C409

C474

C446

C456

C458

C459

9.1VREG

C454

C461

R436

R439

C463

C455

C451

C450

C452

C448

C445

C449

C442

C440

C457

C471

C472

C465

C404

C405

C407

C464

C467

C466

C468

C473

C403

C402

TP6

TP1

TP2

C103

C470

C105

TXGND

GND1

TXANT

C418

C428

C424

C425

C429

C207

C430

C421

C420

C410

C453

R423

C475

C441

DET

R337

C447

IC401

R413

R406

R316

R315

C427

C426

C417

C422

LED201

C438

C439

C436

R231

R209

R232

R215

R207

C204

IC201

R233

R234

R235

R202

R203

R419

R417

R418

RXDT

R415

R444

R416

R411

R211

C311

R204

LOCATOR

R412

R410

R409

R408

R407

R404

R405

R403

RXGND

RXANT

R432

R434

R430

R429

R433

R425

R427

R435

TP7

C310

C314

C315

C306

C321

C313

R311

R302

R336

R334

R303

R304

R333

R317

R320

R308

R319

R318

R313

DC12V

CH+

CH-

PWR_GND

PbF

R105

R106

R109

R108

R107

R443

R110

R103

R102

R310

C307

GND3

TIP

RING

R305

R321

R322

C309

R208

R217

C305

C323

R335

C322

SA303

C101

R312

R428

Q402

Q305

R426

R422

R421

R424

R431

TXVCO

RXVCO

C406

C411

R402

R447

R445

R401

R437

R438

R440

R442

R441

Q404

Q401

R420

SQL

Q202

Q201

R206

R205

R216

R225

R210

PDown

5VREG

R226

R230

C206

R236

CH_UP

C205

R323

CH-UP

Loop

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KX-TC2101BXB

Summary of Contents for KX-TC2101BXB

Page 1: ...nications Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX TC2101BXB Cordless Phone Black Version for Asia Middle Near East and Other Areas Telephone Equipment ORDER NO KM40510914CE ...

Page 2: ...ata 30 12 5 Waveform of DATA used for cordless transmission and reception 30 13 BLOCK DIAGRAM BASE UNIT 31 14 CIRCUIT OPERATION BASE UNIT 32 14 1 Outline 32 14 2 Power Supply Circuit 33 14 3 Reset Circuit 34 14 4 Charge Circuit 35 14 5 Telephone Line Interface 35 14 6 Transmitter Receiver 36 15 BLOCK DIAGRAM HANDSET 38 16 CIRCUIT OPERATION HANDSET 39 16 1 Outline 39 16 2 Reset Circuit 39 16 3 Batt...

Page 3: ... 27 1 Base Unit SCHEMATIC DIAGRAM BASE UNIT 55 27 2 Handset SCHEMATIC DIAGRAM HANDSET 55 28 SCHEMATIC DIAGRAM BASE UNIT 56 29 SCHEMATIC DIAGRAM HANDSET 57 30 CIRCUIT BOARD BASE UNIT 59 30 1 Component View 59 30 2 Flow Solder Side View 60 31 CIRCUIT BOARD HANDSET 61 31 1 Component View 61 31 2 Flow Solder Side View 62 3 KX TC2101BXB ...

Page 4: ...be careful not 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 ...

Page 5: ... OUTPUT PAUSE CH Q803 C851 IFGND GND ANT_TP NDTC SP SP 1 3 4 6 C872 C873 Marked Note The location of the PbF mark is subject to change without notice 2 FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity When repairing the following precautions will help prevent recurring malfunctions 1 Cover plastic parts boxes with aluminum foil 2 Ground the soldering irons 3 Use a conducti...

Page 6: ...4 OPERATING INSTRUCTIONS 4 1 Battery 4 1 1 Recharge 4 1 2 Battery information 4 1 3 Battery Replacement 6 KX TC2101BXB ...

Page 7: ...4 2 Location of Controls 4 2 1 Base Unit 4 2 2 Handset 7 KX TC2101BXB ...

Page 8: ...4 3 Connection 8 KX TC2101BXB ...

Page 9: ...4 4 Troubleshooting 9 KX TC2101BXB ...

Page 10: ...5 DISASSEMBLY INSTRUCTIONS Shown in Fig To Remove Remove 1 Cabinet Cover Screws 2 6 12 A 4 Main P C Board Main P C Board 10 KX TC2101BXB ...

Page 11: ...Shown in Fig To Remove Remove 2 Cabinet Cover Battery compartment cover 3 Screws 2 6 12 B 2 4 Follow the procedure 5 Main P C Board Screw 2 6 12 C 1 Main P C Board 11 KX TC2101BXB ...

Page 12: ...6 TROUBLESHOOTING GUIDE Cross Reference Check Power P 13 Bell Reception P 14 Check Battery Charge P 15 Check Link P 16 Check Handset Transmission P 17 Check Handset Reception P 18 12 KX TC2101BXB ...

Page 13: ...uit P 34 Power Supply Circuit P 33 Cross Reference Charge Circuit P 35 Note CPU IC201 Note CPU IC701 6 1 Check Power Each measurement points are shown in CIRCUIT BOARD BASE UNIT P 59 or CIRCUIT BOARD HANDSET P 61 13 KX TC2101BXB ...

Page 14: ... P 16 Telephone Line Interface P 35 Cross Reference Check Link P 16 Note CPU IC201 Note CPU IC701 6 2 Bell Reception Each measurement points are shown in CIRCUIT BOARD BASE UNIT P 59 or CIRCUIT BOARD HANDSET P 61 14 KX TC2101BXB ...

Page 15: ...arge Circuit P 35 Cross Reference Reset Circuit P 39 Note CPU IC201 Note CPU IC701 6 3 Check Battery Charge Each measurement points are shown in CIRCUIT BOARD BASE UNIT P 59 or CIRCUIT BOARD HANDSET P 61 15 KX TC2101BXB ...

Page 16: ... Refer to Adjustment P 20 Note CPU IC201 RF IC IC401 6 4 Check Link Each measurement points are shown in CIRCUIT BOARD BASE UNIT P 59 or CIRCUIT BOARD HANDSET P 61 16 KX TC2101BXB ...

Page 17: ...stment P 23 Note CPU IC701 RF IC IC801 Each measurement points are shown in CIRCUIT BOARD BASE UNIT P 59 or CIRCUIT BOARD HANDSET P 61 6 5 Check Handset Transmission Cross Reference SIGNAL ROUTE P 41 17 KX TC2101BXB ...

Page 18: ...Cross Reference SIGNAL ROUTE P 41 6 6 Check Handset Reception 18 KX TC2101BXB ...

Page 19: ...confirmation in item C The transmit power output is low and the operating distance between the base unit and the handset is less than normal Make adjustments in item D The reception sensitivity of base unit is low with noise Make confirmation in item E The transmit level is high or low Make confirmation in item F The reception level is high or low Make confirmation in item G The unit does not link...

Page 20: ...3ch Talk T401 1 Apply 60dBm output from S S G modulation frequency 1KHz dev 0KHz 2 Confirm that the reading of AF VTVM is the maximum value more than 20mV DPX401 T401 CF401 CF402 F Line Output Level Confirmation 3ch Talk 1 Apply 60dBm output from S S G modulation frequency 1KHz dev 3KHz 2 Confirm that the reading of AF VTVM is more than 150mV 600Ω load IC401 Q304 G Line Input Modulation Confirmati...

Page 21: ...202 R203 R419 R417 R418 RXDT R415 R444 R416 R411 R211 C311 R204 LOCATOR R412 R410 R409 R408 R407 R404 R405 R403 RXGND RXANT R432 R434 R430 R429 R433 R425 R427 R435 TP7 C310 C314 C315 C306 C321 C313 R311 R302 R336 R334 R303 R304 R333 R317 R320 R308 R319 R318 R313 DC12V CH CH PWR_GND PbF R105 R106 R109 R108 R107 R443 R110 R103 R102 R310 C307 GND3 TIP RING R305 R321 R322 C309 R208 R217 C305 C323 R335...

Page 22: ...an normal Make adjustments in item E The reception sensitivity of the handset is low with noise Make confirmation in item F Does not link between the base unit and the handset Make confirmation in item G The reception level is high or low Make confirmation in item H The transmit level is high or low Make confirmation in item I Refer to Adjustment P 23 Unit condition 1 Remove the antenna lead wire ...

Page 23: ...F RX Sensitivity Confirmation 2nd IF output 3ch Talk T801 1 Apply 60dBm output from S S G modulation frequency 1KHz dev 0KHz 2 Confirm 2nd IF output so that the reading of AF VTVM is the maximum value more than 20mV DPX1 T801 CF801 CF802 G Noise Squelch Confirmation 3ch Talk 1 Measure the S S G output level when the noise squelch changes from Low to High modulation frequency 1KHz dev 3KHz 2 Confir...

Page 24: ...839 C864 R837 R848 C848 R841 C860 C858 C832 C831 C836 REDIAL LED705 LED703 LED704 PbF LED702 DIRECT TXVCO C804 C839 C838 PSAVE AUTO TALK 2 1 4 7 5 0 1 2 8 6 9 3 FLASH LED701 RINGER LOUD PROGRAM MIC GND OUTPUT PAUSE CH Q803 C851 IFGND GND ANT_TP NDTC SP SP 1 3 4 6 C872 C873 DC Volt Meter RXVCO IFGND DC Volt Meter TXVCO RF Volt Meter IFOUT IFGND IFGND Frequency Counter Spectrum Analyzer RF Signal Ge...

Page 25: ...lue Refer to Remarks TX Frequency 49 860 MHz 700 Hz ADJUSTMENTS HANDSET D at CH3 TX Power more than 3dBm ADJUSTMENTS HANDSET E at CH3 Antenna soldering point 50Ω Load Data Modulation factor 5 5 KHz 1 5 KHz ADJUSTMENTS HANDSET J at CH3 MIC Modulation factor 2 5 KHz 0 4 KHz ADJUSTMENTS HANDSET I at CH3 MIC terminal 4mV Input SP Output level more than 40 mV Refer to Adjustment P 23 10 HOW TO CHECK TH...

Page 26: ...ncy 1 43 720 49 670 49 670 43 720 2 43 740 49 845 49 845 43 740 3 43 820 49 860 49 860 43 820 4 43 840 49 770 49 770 43 840 5 43 920 49 875 49 875 43 920 6 43 960 49 830 49 830 43 960 7 44 120 49 890 49 890 44 120 8 44 160 49 930 49 930 44 160 9 44 180 49 990 49 990 44 180 10 44 200 49 970 49 970 44 200 26 KX TC2101BXB ...

Page 27: ...12 EXPLANATION OF CPU DATA COMMUNICATION 12 1 STAND BY TALK TALK STAND BY The channel is changed if the noise interferes with the conversation 27 KX TC2101BXB ...

Page 28: ...12 2 Ringing 28 KX TC2101BXB ...

Page 29: ...12 3 Changing the Channel 29 KX TC2101BXB ...

Page 30: ... Waveform of DATA used for cordless transmission and reception The DATA which is transmitted from the Handset to the Base Unit is combination of DATA 0 DATA 1 DATA Delimit The DATA which is transmitted from the Base Unit to the Handset is combination of DATA 0 DATA 1 DATA Delimit 12 5 1 Handset 12 5 2 Base Unit For example one of part of data 30 KX TC2101BXB ...

Page 31: ... PD MIC AMP LIMITER COMPRESSOR RESET POWER DOWN MODULATION TX VCO Q403 T402 DV401 TX AMP Q404 Q405 T403 RF DATA RF CLOCK RF EN POWER DOWN RESET RX DATA MCU CPU IC201 TEL LINE AMP Q304 TEL LINE SW Q301 Q302 Diode Bridge D303 D306 TEL LINE AMP Q305 TX DATA Crystal BELL DTC Q309 DC 12V Transistor Q101 D103 DC9 1V DC5V LED201 Q201 Charge Control Q102 Q103 Q104 Charge Detection Charge Control KX TC2101...

Page 32: ... system Forming analyzing all data signals ACK CMD signal etc All interfaces ex LED Detector Circuit Charge Power Down RF IC IC401 PLL Oscillator Detection Compress Expander 1st 2nd mixer Amplifier for transmission and reception DC 5 5V regulator Reset Circuit Additionally Power Supply Circuit Charge Circuit Telephone Line Interface Circuit 32 KX TC2101BXB ...

Page 33: ...et During the stand by mode the unit stops transmitting but receives the signal During on hook condition the handset is placed on the base unit backup power for memory of the last dialed number is supplied through the battery DC 3 6V Nickel Cadmium in the handset The memory of this unit is not backed up by the current from the telephone line The base unit DC power supply is regulated by Q101 D103 ...

Page 34: ...14 3 Reset Circuit After power supply from AC adaptor the reset signal for CPU is making in IC401 Refer to the below waveform Fig 2 Fig 3 34 KX TC2101BXB ...

Page 35: ... telephone rings the AC ring voltage is transferred as follows JK1 TIP P0301 L301 R334 C322 Q309 IC201 Pin30 JK1 RING L302 R333 C321 C323 Q309 IC201 Pin30 When the CPU detects a ring signal and press the TALK key on the handset Q302 turns on and then Q301 turns on thus providing an off hook condition active DC current flow through the circuit and the following signal flow is for the loop current T...

Page 36: ...y Receiver amplifier is output to receiver REC1 The receiver loudness is adjustable by using LOUD key on the handset TX data to Handset CPU VTX becomes low to turn on the transmission power transistor Q805 and CPU TX data sends data signal It is FM modulated by TX VCO and driven by RF AMP then transmitted to the handset 14 6 2 Handset to Base Circuit Operation The voice signal from the handset use...

Page 37: ...y RF AMP RF signal received from RF IC is mixed with RX local frequency at Mixer to generate 10 695 MHz wide band IF The reference frequency is generated by X801 10 240 MHz crystal The 10 695 MHz is mixed with reference and 455 KHz narrow band IF is generated RF IC is controlled by CPU RF EN RF DATA RF CLOCK The RX local frequency is generated by RX VCO 37 KX TC2101BXB ...

Page 38: ...R AMP DATA AMP DATA Filter Filter 1st Local Crystal PLL Osc TX PD RX PD MIC AMP LIMITER COMPRESSOR POWER DOWN MODULATION TX VCO Q804 T803 DV1 TX AMP Q802 Q803 T802 RF DATA RF CLOCK RF EN POWER DOWN RX DATA MCU CPU IC701 SPEAKER MIC TX DATA Crystal Battery Q705 Charge Detection Key Matrix Reset Q704 Q701 Q702 Buzzer DC3 9V KX TC2101 BLOCK DIAGRAM HANDSET KX TC2101BXB 38 ...

Page 39: ...uzzer Detector Circuit Charge Battery Low RAM for keeping the data CH Number ID Code etc RF IC IC801 PLL Oscillator Detection Compress Expander 1st 2nd mixer Amplifier for transmission and reception 16 2 Reset Circuit The power of handset is supplied by battery Whenever the battery is recharged or inserted the impulse at CHG becomes Reset signal through Q704 and it is sent to CPU Fig 4 Fig 5 39 KX...

Page 40: ...ry detected blocks are inside of RF IC The detected voltage is as follows Battery Low Battery voltage V Batt 3 457V The CPU detects the level and Recharge battery LED starts flashing Power Down Battery voltage V Batt 3 0V The output of RF IC Power Down becomes low level then CPU stops working to keep the data CH number ID Code etc Fig 6 40 KX TC2101BXB ...

Page 41: ...17 SIGNAL ROUTE Each signal route is as follows 41 KX TC2101BXB ...

Page 42: ...18 CPU DATA Base Unit 18 1 IC201 42 KX TC2101BXB ...

Page 43: ...19 CPU DATA Handset 19 1 IC701 43 KX TC2101BXB ...

Page 44: ...20 RF IC Base Unit and Handset 20 1 Base Unit IC401 Handset IC801 44 KX TC2101BXB ...

Page 45: ...Flux Specific Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free P 4 21 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 ...

Page 46: ...g with the corresponding 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 21 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 46 KX TC2101BXB ...

Page 47: ...22 CABINET AND ELECTRICAL PARTS BASE UNIT 47 KX TC2101BXB ...

Page 48: ...23 CABINET AND ELECTRICAL PARTS HANDSET 48 KX TC2101BXB ...

Page 49: ...24 ACCESSORIES AND PACKING MATERIALS 49 KX TC2101BXB ...

Page 50: ...25 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 25 1 Base Unit 25 2 Handset 50 KX TC2101BXB ...

Page 51: ...P C Board Parts Note 1 When you have replaced IC401 adjust X401 Refer to ADJUSTMENTS BASE UNIT P 19 Ref No Part No Part Name Description Remarks PCB1 PQWPC2101BXH MAIN P C BOARD ASS Y RTL ICs IC201 MN101C94AKA IC IC401 AN6266FA IC 1 TRANSISTORS Q101 B1AADE000014 TRANSISTOR SI Q102 B1AADE000014 TRANSISTOR SI Q103 B1AADE000014 TRANSISTOR SI Q104 B1ABDE000020 TRANSISTOR SI Q201 PQVTDTC143E TRANSISTOR...

Page 52: ... R433 ERJ3GEYJ223 22K R434 ERJ3GEYJ102 1K R435 ERJ3GEYJ330 33 Ref No Part No Part Name Description Remarks R436 ERJ3GEYJ101 100 R437 ERJ3GEYJ103 10K R438 ERJ3GEYJ153 15K R439 ERJ3GEYJ101 100 R440 ERJ3GEYJ681 680 R441 ERJ3GEYJ393 39K R442 ERJ3GEYJ222 2 2K R443 ERJ3GEY0R00 0 R444 ERJ3GEY0R00 0 R445 ERJ3GEYJ103 10K R446 ERJ3GEY0R00 0 CAPACITORS C102 ECEA1EKA100 10 C103 ECUV1H103KBV 0 01 C104 ECEA1CK1...

Page 53: ...PCB100 PQWPC2101BXR MAIN P C BOARD ASS Y RTL ICs IC701 MN101C427AP IC IC801 AN6265FA IC 1 Ref No Part No Part Name Description Remarks TRANSISTORS Q701 B1ADDE000022 TRANSISTOR SI Q702 B1ABDE000020 TRANSISTOR SI Q704 B1ABDE000020 TRANSISTOR SI Q705 B1GBCFGJ0011 TRANSISTOR SI Q801 B1ABDE000020 TRANSISTOR SI Q802 B1ABDE000020 TRANSISTOR SI Q803 B1ABDE000020 TRANSISTOR SI Q804 B1ABDE000020 TRANSISTOR ...

Page 54: ...827 ECUV1H103KBV 0 01 C828 ECUV1H103KBV 0 01 C829 ECUV1H103KBV 0 01 C830 ECUV1H103KBV 0 01 C831 ECUV1H220JCV 22P C833 ECUV1C224KBV 0 22 C834 ECUV1H103KBV 0 01 C835 ECUV1C474KBV 0 47 C836 ECUV1C104KBV 0 1 C837 ECST0JY106 10 S C838 ECUV1H270GCV 27P C839 ECUV1H390GCV 39P C840 ECUV1C104KBV 0 1 C841 ECUV1H680JCV 68P C842 ECJ1VB1H472K 0 0047 C843 ECUV1H103KBV 0 01 Ref No Part No Part Name Description Re...

Page 55: ...ew technology Important Safety Notice Components identified by mark have special characteristics important for safety When replacing any of these components use only the manufacturer s specified parts 27 2 Handset SCHEMATIC DIAGRAM HANDSET 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 t...

Page 56: ...28 SCHEMATIC DIAGRAM BASE UNIT KX TC2101 SCHEMATIC DIAGRAM Base Unit NC No Components IC401 IC201 TX DATA DC9 1V DC5 5V DC5 0V RX DATA KX TC2101BXB 56 ...

Page 57: ...29 SCHEMATIC DIAGRAM HANDSET KX TC2101 SCHEMATIC DIAGRAM Handset NC No Components IC801 TX DATA RX DATA IC701 SPEAKER KX TC2101BXB 57 ...

Page 58: ...Memo KX TC2101BXB 58 ...

Page 59: ... J34 J1 C209 X401 PbF J5 J6 J21 PQUP11346Z J22 J25 J37 J35 J18 J17 J2 R307 C302 L301 R314 DV401 K A PO301 GND 2 1 SA301 JK1 C104 D103 DPX401 J24 C413 J23 CF401 J19 IN GND OUT J12 J13 J15 J16 J26 J10 J9 J8 J14 J20 J11 J7 R418 CF402 R414 SW201 J3 D201 L201 X201 J36 J31 C401 D105 D104 L104 R101 CH CH D305 L302 R301 D301 D302 D401 SA302 C301 J29 R309 R306 D306 J28 D304 D303 L103 C304 C303 T402 1 3 6 4...

Page 60: ...R211 C311 R204 LOCATOR R412 R410 R409 R408 R407 R404 R405 R403 RXGND RXANT R432 R434 R430 R429 R433 R425 R427 R435 TP7 C310 C314 C315 C306 C321 C313 R311 R302 R336 R334 R303 R304 R333 R317 R320 R308 R319 R318 R313 DC12V CH CH PWR_GND PbF R105 R106 R109 R108 R107 R443 R110 R103 R102 R310 C307 GND3 TIP RING R305 R321 R322 C309 R208 R217 C305 C323 R335 C322 SA303 C101 R312 R428 Q402 Q305 R426 R422 R4...

Page 61: ...67 C835 C827 C830 C833 C869 C826 C841 C844 C846 C828 C825 C814 C816 C813 C818 C820 C821 DV1 T803 T802 IC801 IC701 T804 T801 C806 L801 CF1 CF2 DPX1 ANT ANT2 BLACK RED C812 C824 C815 C859 C817 C874 C703 C704 C702 C868 C850 C847 C876 PbF PQUP11347Z C705 R706 R702 C706 C707 6 6 4 4 4 5 5 4 1 1 1 2 3 1 3 3 6 4 1 3 L602 48 37 13 24 36 25 1 12 R849 R844 R815 R703 C810 A K C809 C701 C601 D702 D601 D602 D7...

Page 62: ...857 R835 C863 R804 C808 C871 R850 R851 RXVCO R801 C803 6 6 4 4 3 3 1 1 6 4 3 1 R834 R802 R833 C856 C805 Q801 Q802 Q804 C866 R843 DTCOUT R838 C862 R839 C864 R837 R848 C848 R841 C860 C858 C832 C831 C836 REDIAL LED705 LED703 LED704 PbF LED702 DIRECT TXVCO C804 C839 C838 PSAVE AUTO TALK 2 1 4 7 5 0 1 2 8 6 9 3 FLASH LED701 RINGER LOUD PROGRAM MIC GND OUTPUT PAUSE CH Q803 C851 IFGND GND ANT_TP NDTC SP ...

Page 63: ...63 KX TC2101BXB A I N KXTC2101BXB ...

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