Panasonic KX-TC1085BXB Page 35 Service Manual Download

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15. POWER SUPPLY BLOCK DIAGRAM (BASE UNIT)

16. CIRCUIT OPERATION (BASE UNIT)

16.1. Transmitter Circuit

The voice signal or the data signal sent to the handset is applied in the anode of the variable
capacitor diode (VARICAP) D805.
VR802 is used for changing the voice signal level, thus changing the modulation level.

Summary of Contents for KX-TC1085BXB

Page 1: ...ORDER NO KM40110694C3 Telephone Equipment KX TC1085BXB Cordless Phone Black Version for Asia Middle Near East and Other areas SPECIFICATIONS 1 ...

Page 3: ...3 ...

Page 4: ...2 LOCATION OF CONTROLS 2 1 Base unit 4 ...

Page 5: ...2 2 Handset 5 ...

Page 6: ...3 CONNECTIONS 3 1 Connecting the AC Adaptor 6 ...

Page 7: ...n connected at all times It is normal for the adaptor to feel warm during use When more than one unit is used the units may interfere with each other To prevent or reduce interference please leave ample space between the base units 3 2 Connecting the Telephone Line Cord 7 ...

Page 8: ...8 ...

Page 9: ...3 3 Adding Another Phone 4 OPERATION 4 1 Making Calls 9 ...

Page 10: ...10 ...

Page 11: ...11 ...

Page 12: ...4 2 Answering Calls 12 ...

Page 13: ...4 3 FLASH Button 13 ...

Page 14: ...5 DISASSEMBLY INSTRUCUTIONS 14 ...

Page 15: ...Shown in Fig To remove Remove 1 Lower Cabinet Screws 3 14 A 5 2 Antenna Screw 3 14 B 1 15 ...

Page 16: ...Shown in Fig To remove Remove 3 Rear Cabinet Battery cover 4 Screws 2 6 14 C 2 5 Antenna Screw 2 6 14 D 1 6 TROUBLESHOOTING LIST 16 ...

Page 17: ...r does not light Check Power The IN USE Charge indicator does not flash The movement of Battery Low indicator is wrong ADJUSTMENTS HANDSET Handset The handset does not respond to a call from base unit The handset does not transmit or the transmit frequency is off The transmit frequency is off The transmit power output is low and the operating distance between base unit and handset is less than nor...

Page 18: ...Cross Reference Check Power Bell Reception Check Sp phone Transmission Check Sp phone Reception Check Battery Charge Check Link Check Handset Transmission Check Handset Reception 7 1 Check Power 18 ...

Page 19: ...Cross Reference Initializing Circuit POWER SUPPLY BLOCK DIAGRAM BASE UNIT Cross Reference Reset Circuit 7 2 Check Sp phone Reception 19 ...

Page 20: ...s Reference Telephone Line Interface Attenuator control 7 3 Check Sp phone Transmission Cross Reference Telephone Line Interface Attenuator control 7 4 Check Battery Charge Cross Reference Charge Circuit 20 ...

Page 21: ...Cross Reference Reset Circuit 7 5 Check Link NOTE RF IC is IC801 CPU is IC701 Refer to CIRCUIT BOARD BASE UNIT 21 ...

Page 22: ...NOTE HANDSET RF IC is IC101 CPU is IC901 Refer to CIRCUIT BOARD HANDSET NOTE BASE UNIT RF IC is IC801 CPU is IC701 Refer to CIRCUIT BOARD BASE UNIT 7 6 Check Handset Transmission 22 ...

Page 23: ...Circuit 7 7 Check Handset Reception Cross Reference HOW TO CHECK THE HANDSET SPEAKER Transmitter Signal Circuit 7 8 Bell Reception Cross Reference Telephone Line Interface Check Link Cross Reference Check Link 8 ADJUSTMENTS BASE UNIT 23 ...

Page 24: ...frequency is off Make comfirmation in item C The transmit power output is low and the operating distance between base unit and handset is less than normal Make adjustments in item D The reception sensitivity of base unit is low with noise Make adjustments in item E The transmit level is large or small Make adjustments in item F The reception level is large or small Make adjustments in item G The u...

Page 25: ...ion of adjustment equipments are as shown in CIRCUIT BOARD BASE UNIT 8 1 Adjustment Standard Base Unit 9 ADJUSTMENTS HANDSET If your unit have below symptoms adjust each item using remedy column from the table 25 ...

Page 26: ...ormal Make confirmation in item E The reception sensitivity of base unit is low with noise Make adjustment in item F Does not link between base unit and handset Make confirmation in item G The reception level is high or low Make adjustment in item H The transmit level is high or low Make adjustment in item I Unit condltion 1 Remove the antenna lead wire from P C Board of handset 2 Power Supply DC ...

Page 27: ...TION 10 1 BASE UNIT Item Value Refer to Remarks TX Frequency 44 200 MHz 700Hz ADJUSTMENTS BASE UNIT at CH10 TX Power More than 1000mV CH10 ADJUSTMENTS BASE UNIT at CH10 Line Modulation factor 3 0 kHz 3 3 kHz Line Modulation Distortion Less than 7 Line Modulation factor Max 4 5 kHz 7 5 kHz Data Modulation factor 2 kHz 6 kHz 27 ...

Page 28: ...S HANDSET at CH10 Antenna soldering point Load Data Modulation factor 4 5 kHz dev 6 5 kHz dev ADJUSTMENTS HANDSET at CH10 MIC Modulation factor 2 5 kHz dev 3 1 kHz dev ADJUSTMENTS HANDSET at CH10 MIC terminal 40dBm Cross Reference ADJUSTMENTS HANDSET 11 HOW TO CHECK THE HANDSET SPEAKER 1 Prepare the digital voltmeter and set the selector knob to ohm meter 2 Put the probes at the speaker terminals ...

Page 29: ...29 ...

Page 30: ...12 FREQUENCY TABLE MHz 13 EXPLANATION OF CPU DATA COMMUNICATION 13 1 Outgoing Call Mode STANDBY TALK 30 ...

Page 31: ...13 2 CH Change Mode 13 3 To terminate Communication 31 ...

Page 32: ...ng signal DATA Ring on the base s a TX frequency then the Handset starts ringing Note a is channels 1 10 old cthese channels are paired 13 5 Ports for transmitting and receiving of data Handset transmitting 44 Pin receiving 25 Pin Base Unit transmitting 10 Pin receiving 7 Pin 32 ...

Page 33: ...d from the Handset to the Base Unit is combination of DATA 0 DATA 1 DATA Delimt Pre data and End data of P1 The DATA which is transmitted from the Base Unit to the Handset is combination of DATA 0 DATA 1 DATA Delimt Pre data and End data of P2 13 6 1 HANDSET 13 6 2 BASE UNIT 13 7 When LINKing 33 ...

Page 34: ... the Handset to the Base Unit in above format The combination of DATA 0 and DATA 1 are changed by each Dial No And the DATA Delimt is between each Frame as a stop The number of Frame is 2 13 9 Tone Dial When executing Tone Dial Tone Dial DATA is transmitted from the Handset to the Base Unit in above format The DATA is changed by Dial No as same as Pulse Dial When Tone Dialing DATA Continue DATA th...

Page 35: ...ERATION BASE UNIT 16 1 Transmitter Circuit The voice signal or the data signal sent to the handset is applied in the anode of the variable capacitor diode VARICAP D805 VR802 is used for changing the voice signal level thus changing the modulation level 35 ...

Page 36: ... the portable unit s ringer is on If the portable unit is not charged the data signal generated by pins 27 of the CPU is sent to the portable unit through RF and then the portable unit s ringer is on NOTE In case of Line 2 16 4 Line Interface In talk status the L1 L2 RLY output from pin 28 29 of IC701 changes to low level causing PC101 and Q101 PC201 Q201 and Q207 to turn on and resulting in a lin...

Page 37: ... from IC402 pin 12 Then the signal is output to the telephone line 16 7 Line Receiving The signal from IC402 pin 10 is input to IC801 pin 9 then the level is adjusted at VR802 The intercom signal is sent from C643 to R646 and it is input to IC801 pin 9 Both of them are output from IC801 pin 3 modulated at D805 and output from the TX circuit TXDATA and the RLY leaking sound are demodulated at D805 ...

Page 38: ...ives a Tx and a Rx signal and supplies a DC input to the Attenuator Control corresponding to the Rx signal The Attenuator Control provides a control signal to the Tx and the Rx Attenuator to switch the appropriate signals on and off The Attenuator Control also detects the level of the volume control to automatically adjust for changing ambient conditions 16 8 2 1 Transmission signal path The input...

Page 39: ...e detector 16 8 2 5 Attenuator control The attenuator control detects the setting of the volume control through Pin 25 of IC601 to automatically adjust for changing ambient conditions 16 9 In Use Detector Circuit 16 9 1 Function This circuit is designed to automatically provide on LED indication when either one s own telephone or another telephone is connected in parallel across the line is engage...

Page 40: ...e the IC102 7 IC202 7 output is more than 3 25 V by mode A or more than 2 5 V by mode B If the LINE use the IC102 7 IC202 7 output is less than 3 25 V by mode A or more than 2 5 V by mode B Parallel connection detection when of hook When off hook the voltage is monitored pin 1 of IC102 IC202 the presence absence of a parallel connection is determined when the voltages by 0 2 V or more NOTE In case...

Page 41: ...gnal Q101 Q201 turn on thus providing an off hook condition active DC current flow through the circuit and the following signal flow is for the DC loop current T POS101 D101 Q101 Q102 R110 D105 D101 R LINE1 T POS201 D201 Q201 Q202 R212 D205 Q207 D204 D201 R LINE2 The receiving signal flows POS101 POS201 Q101 Q201 C108 C207 C110 C209 R114 R211 Q103 Q203 C115 C220 R137 R231 Q104 Q205 PC103 The trans...

Page 42: ...1 2 Circuit operation When the AC Adaptor is inserted into the unit then the voltage is shifted by D309 and power is supplied to the CPU The set can operate beyond point A in the circuit voltage diagram 42 ...

Page 43: ...ws DC 12V L351 CHG Base JT Handset L503 D501 CN1 2 Battery CN1 1 JT Handset CHG Base L353 R352 DC GND In this way the CPU on both unit detects the fact that the battery is charged The charge current is controlled by switching Q353 Base The battery is charged in normal mode for 10 hours and then in trickle mode 43 ...

Page 44: ...16 13 Signal Route Each signal route is as follows 44 ...

Page 45: ...45 ...

Page 46: ... MHz 44 20 MHz which is input from ANT is filtered by DUP101 and is input to Pin 42of IC101 The RX VCO which oscillates at T201 and IC101 is locked to 1st Local frequency by PLL inside IC101 PLL is controlled by serial data output from Pin 28 29 and 30 of IC901 An input signal from Pin 42 of IC101 and 1st Local frequency output from RX 46 ...

Page 47: ...e 455kHz signal it is input to Pin 33 of IC101 and passes through IF AMP and Detector Circuit then are output to Pin 26 AF signal flows through R123 C124 Its level is controlled by the VOLUME CONTROL Amp of IC101 The signal is received at Pin 25 of IC101 then it passes through the following circuits PREAMP Expander and Amplifier It goes out at Pin 16 and finally is sent to the SP Inside IC101 RX M...

Page 48: ...ses through the filters arranged by C202 VR201 R201 and C203 R203 and it is input to the Pin 9 of IC101 Inside it the signal passes through the MIC AMP and Compressor circuits and SPLATTER FILTER is output to Pin 3 It flows through R204 C221 R221 then is input to modulator circuit 48 ...

Page 49: ...ircuit Operation Only the data received are passed through the low pass filter formed by R216 and C129 to be input at pin 22 of IC101 where its wave form is adjusted The resulting signal is output from Pin 13 and sent to CPU directly 49 ...

Page 50: ... the inside of IC101 so its output is sent to Pin 26 of IC901 The CPU detects this level by its Pin 26 and battery low indicator lights starts flashing The IC101 check the level of the battery if this level is less than 3 3 V the output of Pin 11 of IC101 then CPU stopsworking to keep the data CH number ID code etc 18 6 CPU Operation 50 ...

Page 51: ...18 7 Reset Circuit When the handset is charged the impulse is sent through C905 Q910 generates the reset signal and it is sent to Pin 20 of CPU 51 ...

Page 52: ... msec 250 msec 110 msec 100 msec 90 msec D905 0 0 0 0 1 1 1 1 D906 0 0 1 1 0 0 1 1 D907 0 1 0 1 0 1 0 1 D905 D907 are used for default setting When you change the flash time do the following procedure In case the program should be set frequency change the default at D905 D907 then set the 52 ...

Page 53: ... PACKAGE IC 21 1 Preparation SOLDER Sparkle Solder 115A 1 115B 1 or Almit Solder KR 19 KR 19RMA Soldering iron Recommended power consumption will be between 30 W to 40 W Temperature of Copper Rod 662 50 F 350 10 C An expert may handle between 60 W to 40 W iron 53 ...

Page 54: ... 2 pins Most important matter is accurate setting of IC to the corresponding soldering foil 2 Apply flux for all pins of FLAT PACKAGE IC 3 Solder employing specified solder to direction of arrow as sliding the soldering iron 21 3 Modification Procedure of Bridge 1 Re solder slightly on bridged portion 2 Remove remained solder along pins employing soldering iron as shown in below figure 54 ...

Page 55: ...22 EXPLANATION OF IC TERMINALS 22 1 Base Unit IC801 55 ...

Page 56: ...22 2 Handset IC101 23 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 56 ...

Page 57: ...24 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 57 ...

Page 58: ...25 ACCESSORIES AND PACKING MATERIALS 58 ...

Page 59: ...26 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 26 1 Base Unit 26 2 Handset 59 ...

Page 60: ...s governing parts and product retention At the end of this period the 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 use specified manufacture s parts 3 The S mark indicates service standard parts and may differ from production parts 4 RESISTORS CAPAC...

Page 61: ... 3 PQHR10678X LED LENSE 4 PQJT10151X CHARGE TERMINAL S 5 PQKE10082Z1 HOOK LEVER S 6 PQKM10447WA UPPER CABINET 7 PQQT11773Z CHARGE LABEL 8 PQQT11859Z ADAPTOR LABEL 9 PQQT22096Z ADAPTOR LABEL 10 PQSA10092Y ANTENNA 11 PQSX10091X 20 KEY BUTTON RUBBER 12 PQSX10107Z 4 KEY BUTTON RUBBER 13 PQYF10154H1 LOWER CABINET S 27 1 2 MAIN P C BOARD PARTS 61 ...

Page 62: ...819A TRANSISTOR SI Q207 2SC4645EAN TRANSISTOR SI S Q210 UN5213 TRANSISTOR SI S Q211 UN5213 TRANSISTOR SI S Q301 2SD1994A TRANSISTOR SI Q310 2SD601A TRANSISTOR SI Q351 2SD1991A TRANSISTOR SI Q352 2SD1994A TRANSISTOR SI Q353 2SD601A TRANSISTOR SI Q401 2SD1819A TRANSISTOR SI Q601 PQVTD143Z106 TRANSISTOR SI S Q602 PQVTD143Z106 TRANSISTOR SI S Q603 2SD601A TRANSISTOR SI Q605 2SD601A TRANSISTOR SI Q606 ...

Page 63: ...IODE SI LEDS LED1 PQVDEL1921SR LED LED2 PQVDSML310MT LED S LED3 PQVDEL1921SR LED LED4 PQVDEL1921SR LED CERAMIC FILTERS CF801 PQVFCFS107MT CERAMIC FILTER CF802 J0B4553A0059 CERAMIC FILTER COILS L101 PQLQXF330K COIL S L102 PQLQXF330K COIL S L201 PQLQXF330K COIL S L202 PQLQXF330K COIL S L301 PQLQXF100K COIL S L302 PQLQXF100K COIL S L351 PQLQZM3R3K COIL S L352 PQLQZM330K COIL S L353 PQLQZM3R3K COIL S ...

Page 64: ...ANSDUCER S PC201 PQVITLP627 PHOTO ELECTRIC TRANSDUCER S PC202 0N3181 PHOTO ELECTRIC TRANSDUCER POS101 PQRPAR390N POSISTOR S POS201 PQRPAR390N POSISTOR S RESISTORS R101 PQ4R10XJ106 10M S R102 PQ4R10XJ106 10M S R103 ERJ3GEYJ104 100k R104 PQ4R10XJ472 4 7k S R105 ERJ3GEYJ472 4 7k R106 PQ4R10XJ102 1k S R107 PQ4R10XJ103 10k S R108 PQ4R10XJ330 33 S R109 ERJ3GEYJ183 18k R110 ERDS1TJ150 15 S R111 ERJ3GEYJ1...

Page 65: ...R138 ERJ3GEYJ102 1k 65 ...

Page 66: ...09 ERJ3GEYJ393 39k R210 ERJ3GEYJ272 2 7k R211 ERJ3GEYJ102 1k R212 ERDS1TJ150 15 S R213 ERDS1TJ220 22 S R214 PQ4R10XJ473 47k S R216 PQ4R10XJ104 100k S R217 ERJ3GEYJ183 18k R222 ERJ3GEYJ102 1k R231 ERJ3GEYJ102 1k R232 ERJ3GEYJ272 2 7k R233 ERJ3GEYJ474 470k R235 ERJ3GEYJ101 100 R236 ERJ3GEYJ471 470 R246 ERJ3GEYJ394 390k R248 ERJ3GEYJ221 220 R252 ERJ3GEYJ104 100k R253 ERJ3GEYJ824 820k R254 ERJ3GEYJ824...

Page 67: ...3GEYJ332 3 3k R454 ERJ3GEYJ123 12k R455 ERJ3GEYJ332 3 3k R456 ERJ3GEYJ332 3 3k R457 ERJ3GEYJ100 10 R458 ERJ3GEYJ103 10k R459 ERJ3GEYJ103 10k R600 ERJ3GEYJ392 3 9k R601 ERJ3GEYJ562 5 6k R602 ERJ3GEYJ303 30k R603 ERJ3GEYJ683 68k R604 ERJ3GEYJ122 1 2k R605 ERJ3GEYJ225 2 2M R606 ERJ3GEYJ275 2 7M R607 ERJ3GEYJ104 100k R608 ERJ3GEYJ472 4 7k R609 ERJ3GEYJ222 2 2k R610 ERJ3GEYJ183 18k R611 ERJ3GEYJ332 3 3...

Page 68: ...04 ERJ3GEYJ563 56k R705 ERJ3GEYJ273 27k R706 ERJ3GEYJ153 15k R707 ERJ3GEYJ683 68k R708 ERJ3GEYJ104 100k R710 ERJ3GEYJ472 4 7k R711 ERJ3GEYJ472 4 7k R712 ERJ3GEYJ104 100k R721 ERJ3GEYJ471 470 R722 ERJ3GEYJ471 470 R723 ERJ3GEYJ471 470 R724 ERJ3GEYJ471 470 R725 ERJ3GEYJ100 10 R802 ERJ3GEYJ331 330 R804 ERJ3GEYJ394 390k R805 ERJ3GEYJ223 22k R806 ERJ3GEYJ103 10k R807 ERJ3GEYJ103 10k R808 ERJ3GEYJ333 33k...

Page 69: ...P C106 ECUV1H101JCV 100P C108 ECUV1E223KBV 0 022 C109 ECEA1EU470 47 S C110 ECEA1HKA010 1 C111 ECEA1HKA010 1 C112 ECEA0JU331 330 C113 ECUV1C104ZFV 0 1 C114 ECUV1H151JCV 150P C115 ECUV1C104KBV 0 1 C117 ECUV1H562KBV 0 0056 C118 ECQE2224KF 0 22 C119 ECUV1H103KBV 0 01 C120 ECUV1C473KBV 0 047 C121 ECEA1AU221 220 C122 ECUV1H101JCV 100P C123 ECUV1H222KBV 0 0022 C124 ECUV1C104KBV 0 1 C125 ECEA1CKA100 10 C1...

Page 70: ...BV 0 001 C313 ECUV1A224KBV 0 22 C355 ECUV1H102KBV 0 001 C357 ECUV1C104ZFV 0 1 C401 ECEA1EU470 47 S C402 ECEA1EU470 47 S C403 ECUV1H103KBV 0 01 C404 ECUV1H101JCV 100P C405 ECUV1C273KBV 0 027 C406 ECUV1A224KBV 0 22 C407 ECUV1C104KBV 0 1 C408 ECUV1H472KBV 0 0047 C409 ECUV1C104KBV 0 1 C410 ECUV1C104KBV 0 1 C600 ECUV1C104KBV 0 1 C601 ECUV1C104KBV 0 1 C602 ECUV1C473KBV 0 047 C603 ECUV1C393KBV 0 039 C606...

Page 71: ...1H103KBV 0 01 C657 ECUV1C104KBV 0 1 C658 ECUV1H102KBV 0 001 C701 ECEA1AU221 220 C702 ECUV1H220JCV 22P C703 ECUV1H220JCV 22P C704 ECEA0JU102 1000 C705 ECUV1C104ZFV 0 1 C706 ECUV1C104ZFV 0 1 C707 ECUV1C104ZFV 0 1 C801 ECUV1C104ZFV 0 1 C802 ECUV1H103KBV 0 01 C804 ECUV1C104KBV 0 1 C805 ECUV1C104ZFV 0 1 C806 ECUV1C104KBV 0 1 C807 ECUV1C104KBV 0 1 C808 ECEA1CKA100 10 C809 ECUV1C104ZFV 0 1 C810 ECUV1H680...

Page 72: ...CUV1A224KBV 0 22 C841 ECUV1H180JCV 18P C842 ECUV1H103KBV 0 01 C843 ECUV1H103KBV 0 01 C844 ECUV1C104KBV 0 1 C845 ECUV1C104KBV 0 1 C851 ECUV1C563KBV 0 056 C852 ECUV1C104KBV 0 1 C853 ECUV1C104KBV 0 1 C854 ECUV1H102KBV 0 001 C856 ECUV1C104ZFV 0 1 C857 ECUV1H150JCV 15P C858 ECUV1H681JCV 680P S C859 ECUV1H330JCV 33P C860 ECUV1H103KBV 0 01 C861 ECUV1H103KBV 0 01 C862 ECUV1H103KBV 0 01 C863 ECUV1H220JCV 2...

Page 73: ...ICS IC101 AN6265FA IC IC301 PQVITK14620M IC S IC901 C2BBFD000338 IC TRANSISTORS Q501 2SD601A TRANSISTOR SI Q502 2SD601A TRANSISTOR SI Q910 PQVT143XK146 TRANSISTOR SI S Q911 PQVTD123T146 TRANSISTOR SI S Q912 PQVTD123T146 TRANSISTOR SI S Q913 PQVTD123T146 TRANSISTOR SI S Q914 PQVTDTC143E TRANSISTOR SI S DIODES D501 PQVDS5688G DIODE SI S D901 PQVDHRU0203A DIODE SI S VD301 MA2SV01001KU DIODE SI C506 M...

Page 74: ...RGE TERMINAL JTC PQJT10152Z CHARGE TERMINAL VR201 PQZ3AN33N VARIABLE RESISTOR S RESISTORS R101 ERJ3GEYJ220 22 R102 ERJ3GEY0R00 0 R104 ERJ3GEYJ331 330 R106 ERJ3GEY0R00 0 R120 ERJ3GEYJ223 22k R121 ERJ3GEYJ394 390k R122 ERJ3GEYJ392 3 9k R123 ERJ3GEYJ562 5 6k R124 ERJ3GEYJ393 39k R125 ERJ3GEYJ823 82k R126 ERJ3GEYJ103 10k R127 ERJ3GEY0R00 0 R129 ERJ3GEYJ683 68k R130 ERJ3GEYJ683 68k R140 ERJ3GEYJ223 22k...

Page 75: ...EYJ222 2 2k C100 PQ4R10XJ000 0 S C301 PQ4R10XJ000 0 S C314 ERJ3GEYJ391 390 J100 PQ4R10XJ000 0 S J101 ERJ3GEY0R00 0 J102 PQ4R10XJ000 0 S J103 PQ4R10XJ000 0 S J111 ERJ3GEY0R00 0 J302 ERJ3GEY0R00 0 L101 PQ4R18XJ000 0 S L501 PQ4R10XJ000 0 S CAPACITORS C101 ECUV1H103KBV 0 01 C102 ECUV1C104ZFV 0 1 C103 ECUV1H103KBV 0 01 C104 ECUV1C104ZFV 0 1 C106 ECUV1H103KBV 0 01 C107 ECUV1C104ZFV 0 1 C108 ECUV1C104ZFV...

Page 76: ... 1 C210 ECUV1C104ZFV 0 1 C211 ECST0JY106 10 C221 ECUV1C104ZFV 0 1 C310 PQCUV1E104MD 0 1 S C311 ECUV1H103KBV 0 01 C313 ECUV1H103KBV 0 01 C317 ECUV1H103KBV 0 01 C321 ECUV1H220JCV 22P S C322 ECUV1H150JCV 15P C323 ECUV1H681JCV 680P S C325 ECUV1H220JCV 22P C330 PQCUV1C104KB 0 1 C331 PQCUV1H103KB 0 01 C351 PQCUV1C224ZF 0 22 S C352 ECUV1E223KBV 0 022 C354 ECUV1H103KBV 0 01 C505 PQCUV1H103KB 0 01 C507 PQC...

Page 77: ...AGRAM 28 1 Base Unit SCHEMATIC DIAGRAM Base Unit Notes 1 DC voltage measurements are taken with voltmeter from the negative voltage line 2 This schematic diagram and circuit board may be modified at any time with the development of new technology 28 2 Handset SCHEMATIC DIAGRAM Handset Notes 1 DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams ...

Page 78: ...30 CIRCUIT BOARD BASE UNIT 30 1 Component View 30 2 Flow Solder Side View 31 CIRCUIT BOARD HANDSET 31 1 Component View 31 2 Flow Solder Side View M KXTC1085BXB 78 ...

Page 79: ...C352 R322 C322 VD301 C321 C323 C311 R303 C203 R203 C204 C205 C206 C207 C157 C150 C104 C107 C112 R109 C108 C109 R123 C127 C124 R905 RINGER C110 R914 R127 C126 R125 R124 C125 R139 C111 X101 J100 J102 L101 D100 DUP101 T201 IC101 43 56 29 1 T210 CF1 CF2 L301 R100 DUP301 C312 C314 J302 IC301 R305 C325 C221 C222 R140 R129 C133 C137 Q101 Q102 R205 C136 C933 R907 IC801 J901 IC901 D914 D913 C202 VR201 D912...

Page 80: ...02 C101 C100 R153 R101 R151 C313 C310 C142 C302 C301 J301 J103 C141 C149 C151 J110 C351 C353 C354 C318 C317 C315 R353 R307 R302 R301 J111 J301 R126 R121 C123 C120 C106 C121 C122 C129 LED902 LED903 LED904 LED912 TALK AUTO INT LED914 C510 C902 J100 C105 C153 C103 MIC CH M N O P I J K 0 L 9 8 7 6 5 4 3 2 1 ...

Page 81: ...6 10 2 1 2 1 11 3 59 3 63 12 3 87 3 90 STBY TALK 36 3 87 3 90 0 40 0 49 2 1 2 1 3 57 3 59 54 STBY 23dBm 20dBm 16dBm 20dBm 20dBm 14 5dBm RF 900mV 3 79 0 2 3 66 0 2 RF 90mV 0 84 0 3 83 0 2 Vol Med IC101 IC301 1 2 3 4 6 7 8 5 ...

Page 82: ... 3kHz Dev 1kHz Mod 2 1 0 3 90 3 90 3 90 2 1 Mic Input 40dBm 600 1kHz IC901 IC801 H5 6V Option D911 D TALK Time 8 Hours 6 Hours 8 2 Diode Contents None Details of Option Provided 1 2 3 4 6 7 8 5 KX TC1085BXB SCHEMATIC DIAGRAM HANDSET ...

Page 83: ... 3kHz Dev 1kHz Mod 2 1 0 3 90 3 90 3 90 2 1 Mic Input 40dBm 600 1kHz IC901 IC801 H5 6V Option D911 D TALK Time 8 Hours 6 Hours 8 2 Diode Contents None Details of Option Provided 1 2 3 4 6 7 8 5 KX TC1085BXB SCHEMATIC DIAGRAM HANDSET ...

Page 84: ...5 4 0 No Voltage 36 7 9 37 1 0 38 0 39 4 0 40 0 41 1 2 42 1 2 No Voltage 43 2 4 44 0 5 45 0 5 46 0 47 2 4 48 2 4 49 2 7 No Voltage 50 1 5 51 0 52 1 4 53 1 4 54 5 2 55 5 2 56 0 1 No IC701 DC voltage TALK Voltage 1 0 2 3 2 3 0 4 5 6 0 7 5 1 No Voltage 17 0 18 0 19 5 0 20 0 21 0 22 4 2 23 0 No Voltage 33 0 34 4 9 35 5 0 36 5 0 37 5 0 38 5 0 39 5 0 No Voltage 49 0 50 4 9 51 4 9 52 4 7 53 0 54 0 55 0 8...

Page 85: ... SP PHONE ON 1 1V 0 5V 3 6V 0V 0V 0V 0V 0V 0V 5 0V 0V 0V 5 0V 5 3V 5 3V 0 5 0V OFF 0V 0V 0V 5 1V 5 5V 5 1V 5 1V 5 8V 6 4V 8 0V 0V 0V 0 7V 0 7V 0 7V 0 4V 1 9V 5 2V 4 0V 0V 0V 0V 0 7V 0 5V 6 2 6 6 V 12 6V 0 6V 1 6V Charging 1 0V 10 2V 5 7V 4 9V No Voltage 1 2 1 2 2 1 3 1 5 4 2 2 5 2 8 6 2 7 No Voltage 7 2 8 8 2 8 9 2 8 10 2 7 11 2 5 12 0 1 No Voltage 13 2 7 14 2 8 15 0 16 3 0 17 7 9 18 1 8 No Voltag...

Page 86: ... SP PHONE ON 1 1V 0 5V 3 6V 0V 0V 0V 0V 0V 0V 5 0V 0V 0V 5 0V 5 3V 5 3V 0 5 0V OFF 0V 0V 0V 5 1V 5 5V 5 1V 5 1V 5 8V 6 4V 8 0V 0V 0V 0 7V 0 7V 0 7V 0 4V 1 9V 5 2V 4 0V 0V 0V 0V 0 7V 0 5V 6 2 6 6 V 12 6V 0 6V 1 6V Charging 1 0V 10 2V 5 7V 4 9V No Voltage 1 2 1 2 2 1 3 1 5 4 2 2 5 2 8 6 2 7 No Voltage 7 2 8 8 2 8 9 2 8 10 2 7 11 2 5 12 0 1 No Voltage 13 2 7 14 2 8 15 0 16 3 0 17 7 9 18 1 8 No Voltag...

Page 87: ...IC801 IC301 IC701 IC402 IC601 IC303 ...

Page 88: ...IC101 IC201 IC802 ...

Page 89: ...0 Test Mode 32Ω AF Volt Meter SP OUT CHG CHG C CHG CP CC CM AF_OSC Line Modulation Factor Signal Input 1 AF_OSC SP_PHONE Receiving 2 AF_OSC MIC Signal Input Intercom SP phone 3 AF_OSC Max Modulation Factor Signal Input 4 AF_OSC Sending Signal Input for check of Conference 5 2 AF OSC 5 Oscilloscope Loop SIMULATOR AF Volt Meter AF OSC 1 600Ω BELL SIMULATOR Oscilloscope Loop SIMULATOR AF Volt Meter A...

Page 90: ...08 C109 R123 C127 C124 R905 RINGER C110 R914 R127 C126 R125 R124 C125 R139 C111 X101 J100 J102 L101 D100 DUP101 T201 IC101 43 56 29 1 T210 CF1 CF2 L301 R100 DUP301 C312 C314 J302 IC301 R305 C325 C221 C222 R140 R129 C133 C137 Q101 Q102 R205 C136 C933 R907 IC801 J901 IC901 D914 D913 C202 VR201 D912 D911 34 44 23 12 1 R505 R506 CN1 R915 C511 D501 L503 C915 C507 C906 R911 Q910 X102 E E C C B B D917 D9...

Page 91: ... C302 C301 J301 J103 C141 C149 C151 J110 C351 C353 C354 C318 C317 C315 R353 R307 R302 R301 J111 J301 R126 R121 C123 C120 C106 C121 C122 C129 LED902 LED903 LED904 LED912 TALK AUTO INT LED914 C510 C902 J100 C105 C153 C103 MIC CH M N O P I J K 0 L 9 8 7 6 5 4 3 2 1 RF VOLT METER 455 GND 455 OUT DC VOLT METER TX PD RX PD S7 S2 Flow Solder Side View ...

Page 92: ...st IF Filter 2nd IF Filter DATA Filter DATA AMP PRE AMP LINE AMP RECEIVER 150 EXPANDER BATT LOW DET POWER DOWN MIC Battery COMPRESSOR MODULATION LIMITTER PLL X201 10 24MHz IC301 SENDING FREQUENCY 49 670 49 990MHz 33 025 33 505MHz 2nd Local 10 240MHz 1 2 3 X102 3 991MHz X901 32 76KHz MIC AMP CPU IC901 IC101 CHARGE DETECT RESET TX Signal RX Signal ...

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Panasonic KX-TC1085BXB, Service Manual

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