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7.2. How to change the channel

Note:

Refer to Adjustment Standard (Base Unit) (P.21) for connection.

7.3. Adjustment

Adjustment Items Test Mode

Adjustment

Point

*Procedure

Check or

Replace

Parts

(A) RX VCO

Adjustment

3ch Talk

T404

•

Adjust T404 so that the reading of the Digital Voltmeter is 1.5 ± 0.3 V.

IC401, T404,

C446

(B) TX VCO

Adjustment

3ch Talk

T402

•

Adjust T402 so that the reading of the Digital Voltmeter is 1.5 ± 0.3 V.

IC401,

DV401,

T402

Confirmation

3ch Talk

•

Confirm so that the reading of the frequency counter is 43.82MHz ±
700Hz.

IC401, X401,

DV401,

C440,

C441

(D) TX Power

Adjustment

3ch Talk

T403

•

Adjust T403 so that the reading of the RF VTVM is more than 10dBm.

IC401, Q403,

Q405, T403,

DPX401

(E) RX Sensitivity

Confirmation (2nd
IF output)

3ch Talk

T401

Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
0KHz).

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

Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
3KHz).

Confirm that the reading of AF VTVM is more than 150mV (600

Ω

load).

IC401, Q304

(G) Line Input

Modulation
Confirmation

3ch Talk

Input via loop simulator 1.0KHz, 55mV (measured at T-R) signal.

Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
0KHz).

Confirm so that the reading of FM Deviation Meter is 2.7 ± 0.5KHz.

IC401,

DV401

(H) Noise Squelch

Confirmation

3ch Talk

Measure the S.S.G. output level when the noise squelch changes from
Low to High.

Confirm that the S.S.G. output level is -95dBm ~ -100dBm.

IC401,

DPX401

* : The connections of adjustment equipment are as shown in Adjustment Standard (Base Unit) (P.21).

S.S.G. Frequency: 49.86 MHz

KX-TC2101BXB

Содержание KX-TC2101BXB

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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...

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

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

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

Страница 9: ...4 4 Troubleshooting 9 KX TC2101BXB ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

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

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

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

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

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

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

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

Страница 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 ...

Страница 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 ...

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

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

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

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

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

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

Страница 58: ...Memo KX TC2101BXB 58 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

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

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