Panasonic KX-TC1200NLB Service Manual Download Page 11

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Show in Fig.

To remove.

Remove.

Lower Cabinet

Screws (2.6 × 12)....................... (A) × 4

Main P.C. Board

Screws (2.6 × 6)......................... (B) × 1

Screws (2.6 × 6)..........................(C) × 2

Screws (2.6 × 12)........................(D) × 1

Main P.C. Board.

Show in Fig.

To remove.

Remove.

Rear Cabinet

Battery compartment cover.

Screws (2.6 × 12)......................(E) × 2

Main P. C. Board

Screw (2.6 × 12)........................(F) × 1

Tape and solder.

Main P. C. Board.

7. TROUBLESHOOTING GUIDE

Summary of Contents for KX-TC1200NLB

Page 1: ...ORDER NO KM40201774C2 Telephone Equipment KX TC1200NLB Cordless Phone Black Version for Holland SPECIFICATIONS 1 ...

Page 3: ...2 BATTERY REPLACEMENT 3 LOCATION OF CONTROLS 3 1 Base Unit 3 ...

Page 4: ...3 2 Handset 4 ...

Page 5: ...4 CONNECTION 5 ...

Page 6: ...rmal 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 KX TC1200NLB is not designed to be used with rotary pulse dialling services 5 OPERATIONS 5 1 Making Calls 6 ...

Page 7: ...5 2 Answering Calls 5 3 Storing Phone Numbers in Memory 7 ...

Page 8: ...5 4 Storing a Phone Number in the DIRECT Button 5 5 Dialing a Stored Number 8 ...

Page 9: ...5 6 Dialing a Stored Number in the DIRECT Button 5 7 Recall Button 9 ...

Page 10: ...6 DISASSEMBLY INSTRUCTIONS 10 ...

Page 11: ...2 Main P C Board Screws 2 6 6 B 1 Screws 2 6 6 C 2 Screws 2 6 12 D 1 Main P C Board Show in Fig To remove Remove 3 Rear Cabinet Battery compartment cover 4 Screws 2 6 12 E 2 5 Main P C Board Screw 2 6 12 F 1 Tape and solder Main P C Board 7 TROUBLESHOOTING GUIDE 11 ...

Page 12: ...Cross Reference Check Power Bell Reception Check Battery Charge Check Link Check Handset Transmission Check Handset Reception 7 1 Check Power 12 ...

Page 13: ...nce Reset Circuit Base Unit Power Supply Circuit Note CPU IC2 Cross Reference Charge Circuit Note CPU IC2 Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset 7 2 Bell Reception 13 ...

Page 14: ...p even after key was pressed to answer the call In this case the Base Unit and the Handset might have been mixed up at the customer side Therefore each of these units should be replaced to the original ones which have the same suffix Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset 7 3 Check Battery Charge 14 ...

Page 15: ...ross Reference Charge Circuit Power Supply Circuit Note CPU IC2 Cross Reference Reset Circuit Handset Note CPU IC2 Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset 15 ...

Page 16: ...7 4 Check Link Refer to Adjustment Note CPU IC2 RF IC IC1 Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset 16 ...

Page 17: ... Refer to Adjustment Note CPU IC2 RF IC IC1 Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset 17 ...

Page 18: ...t Make adjustments in item The base unit dose not transmit or the transmit frequency is off Make adjustments in item The transmit frequency is off Make confirmation in item The transmit power output is low and the operating distance between the base unit and the handset is less than normal Make confirmation in item The reception sensitivity of base unit is low with noise Make confirmation in item ...

Page 19: ...est Mode Flow Chart Base Unit The operation flow of Test mode and main check items are shown below Note Refer to the above table 8 2 How to change the channel Refer to Flow Solder Side View 8 3 Adjustment 19 ...

Page 20: ... 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 300mV 40mV 600 load G Line Input Modulation Confirmation 3ch Talk 1 Input via loop simulator 1 0KHz 55mV measured at T R signal 2 Apply 60dBm output from S S G modulation frequency 1KHz dev 0KHz 3 Confirm so that the reading of FM Deviation Meter is 3 1KHz 0 3KHz...

Page 21: ... power output is low and the operating distance between the base unit and the Handset is less than normal Make confirmation in item The reception sensitivity of base unit is low with noise Make confirmation item F Does not link between the base unit and the handset Make confirmation in item The reception level is high or low Make confirmation item H The transmit level is high or low Make adjustmen...

Page 22: ...Note Refet to CIRCUIT BOARD Handset Signal Route 9 2 How to change the channel 9 3 Adjustment 22 ...

Page 23: ...dBm output from S S G modulation frequency 1KHz dev 0KHz 2 Confirm 2nd IF output so that the reading of RF VTVM is more than 15mV G Noise Squelch Confirmation 3ch Talk 1 Measure the SSG output level when the noise squelch changes from Low to High modulation frequency 1KHz dev 3kHz 2 Confirm that the SSG output level is 105dBm H Speaker Output Level confirmation 3ch Talk 1 Apply 60dBm output from S...

Page 24: ...el 7dBm Refer to Adjustment 10 2 Handset Item Value Refer to Remarks TX Frequency 39 9875 MHz 0 1kHz ADJUSTMENTS HANDSET D at CH3 TX Power 9 0mW 0 2mW 3CH ADJUSTMENTS HANDSET E at CH3 Antenna soldering point 50 Load Data Modulation factor 4 0 kHz dev 8 0 kHz dev ADJUSTMENTS HANDSET J at CH3 MIC Modulation factor 2 7 kHz dev 3 3 kHz dev ADJUSTMENTS HANDSET I at CH3 MIC terminal 2 4mV Input SP Outpu...

Page 25: ...25 ...

Page 26: ...39 9875 39 9875 31 0875 4 31 1125 40 0125 40 0125 31 1125 5 31 1375 40 0375 40 0375 31 1375 6 31 1625 40 0625 40 0625 31 1625 7 31 1875 40 0875 40 0875 31 1875 8 31 2125 40 1125 40 1125 31 2125 9 31 2375 40 1375 40 1375 31 2375 10 31 2625 40 1625 40 1625 31 2625 11 31 2875 40 1875 40 1875 31 2875 12 31 3125 40 2125 40 2125 31 3125 13 EXPLANATION OF CPU DATA COMMUNICATION 13 1 STAND BY TALK TALK ST...

Page 27: ... The channel is changed if the noise interferes with the conversation 13 2 Ringing 27 ...

Page 28: ...13 3 Changing the Channel 28 ...

Page 29: ... for transmitting and receiving of data Handset transmitting TX 36 Pin receiving RX 4 Pin Base Unit transmitting TX 17 Pin receiving RX 10 Pin 13 5 Waveform of DATA used for cordless transmission and reception 29 ...

Page 30: ...transmitted from the Handset to the Base Unit is combination of DATA 0 DATA 1 PSEUD The DATA which is transmitted from the Base Unit to the Handset is combination of DATA 0 DATA 1 PSEUD 13 5 1 Handset 13 5 2 Base Unit 30 ...

Page 31: ...unit consists of the following ICs as shown in BLOCK DIAGRAM CPU IC2 Controlling the whole system Forming analyzing all data signals ACK CMD signal etc All interfaces ex LED KEY SP Mic LCD Detector Circuit Charge Power Down Refer to EXPLANATION OF CPU DATA COMMUNICATION RF IC IC1 PLL Oscillator Detection Compress Expander 31 ...

Page 32: ...ly Circuit The power supply to the CPU Digital Analog and RF IC from AC Adaptor 12V is shown in the diagram below The base unit power supply is DC12V The handset s power is supplied from 3 6V battery Nickel Cadmium battery which is installed in the handset Power supply for transmitter is turned on by a press of Talk key on the handset During the stand by mode the unit stops transmitting but receiv...

Page 33: ...Adaptor power failure and maintains the unit security code Fig 1 16 3 Reset Circuit Base Unit After power supply from AC adaptor the VREG is input for making reset signal Refer to the below waveform Fig 2 Fig 3 33 ...

Page 34: ...d by switching Q701 of Handset The battery is charged in normal mode for 10 hours and then in trickle mode 16 5 Telephone Line Interface Function Bell signal detection ON OFF hook circuit Side tone circuit Bell signal detection and OFF HOOK circuit In the idle mode Q103 is open to cut the DC loop current and decrease the ring load When ring voltage appears at the Tip T and Ring R leads When the te...

Page 35: ...se Unit and Handset transmit receive voice signal and data signal through the antenna on carrier frequency Signal Pass Refer to CDL TX RX in Signal Route 16 6 1 Base to Handset Circuit Operation The voice signal input from the TEL LINE interface goes to RF IC as shown in BLOCK DIAGRAM BASE UNIT In the talk mode off hook condition the telephone line voice signal passes through D2 D3 D4 D5 RY1 Relay...

Page 36: ...ice signal from the handset user is picked up by the microphone MC1 voice signal passes through Compressor process to reduce noise as shown in BLOCK DIAGRAM HANDSET And the voice is FM modulated by VARICAP DV1 The carrier frequency is generated by TX VCO The transmitter power transistor Q4 is turned on off by CPU VTX The carrier signal is amplified by RF AMP and sent to the handset duplexer and an...

Page 37: ...de band IF The reference frequency is generated by X1 11 15 MHz crystal VC1 is the reference frequency for adjustment The 10 7 MHz is mixed with reference and 450KHz narrow band IF is generated The demodulation audio signal is adjusted to the maximum at T1 RF IC is controlled by CPU RF_STB DATA CLK The RX local frequency is generated by RXVCO 16 7 Signal Route Each signal route is as follows 17 CI...

Page 38: ...Fig 4 Fig 5 38 ...

Page 39: ...cted blocks are inside of RF IC The detected voltage is as follows Battery Low Battery voltage V Batt 3 57V The CPU detects this level and Recharge battery LED starts flashing Power Down Battery voltage V Batt 3 3V The output of RF IC P DOWN becomes low level then CPU stops working to keep the data CH number ID Code etc Fig 6 18 CPU DATA Base Unit 18 1 IC2 39 ...

Page 40: ...19 CPU DATA Handset 19 1 IC2 40 ...

Page 41: ...20 HOW TO REPLACE FLAT PACKAGE IC 20 1 Preparation SOLDER 41 ...

Page 42: ...iron but beginner might damage foil by overheating Flux HI115 Specific gravity 0 863 Original flux will be replaced daily 20 2 Procedure 1 Temporary fix FLAT PACKAGE IC by soldering on two marked 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...

Page 43: ...ification Procedure of Bridge 1 Re solder slightly on bridged portion 2 Remove remained solder along pins employing soldering iron as shown in below figure 21 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 43 ...

Page 44: ...22 CABINET AND ELECTRICAL PARTS LOCATION HANDET 44 ...

Page 45: ...23 ACCESSORIES AND PACKING MATERIALS 45 ...

Page 46: ...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 means the part is one of some identical parts For that reason it may be different from the installed part...

Page 47: ...Z CHARGE TERMINAL 2 PQHR10882Z LED LENS 3 PQGT14798Z NAME LABEL 4 PQQT22392Z CHARGE LABEL 5 PQBC10349Z1 PUSH BUTTON S 6 PQKE10335Z1 HOOK LEVER S 7 PQKF10534Y1 LOWER CABINET S 8 PQKM10509R1 UPPER CABINET S 9 PQSA10105Y ANTENNA 10 PQQT22371Z COVER LABEL 11 XXLABALACE1 HOOK LABEL 24 1 2 MAIN P C BOARD PARTS 47 ...

Page 48: ...18 BB1G0390403 TRANSISTOR SI Q19 BB1G0390403 TRANSISTOR SI Q20 SB110390405 TRANSISTOR SI Q21 SB110390405 TRANSISTOR SI DIODES D1 SC15L414808 DIODE SI D2 BC2G0400400 DIODE SI D3 BC2G0400400 DIODE SI D4 BC2G0400400 DIODE SI D5 BC2G0400400 DIODE SI D6 BC2G0400400 DIODE SI DV1 BC6K0025101 DIODE SI R182 SV110201203 DIODE SI ZD1 BC050474801 DIODE SI ZD10 SC4555C1506 DIODE SI ZD2 BC050474801 DIODE SI ZD3...

Page 49: ...00105H7 RELAY SW1 DETP1200017 PUSH SWITCH VC1 CR00020RRT5 TRIMMER CAPACITOR RESISTORS R1 ERJ3GEYJ470 47 R2 ERJ3GEYJ331 330 R3 ERJ3GEYJ153 15k R4 ERJ3GEYJ822 8 2k R5 ERJ3GEYJ103 10k R6 ERJ3GEYJ103 10k R7 ERJ3GEYJ334 330k R8 ERJ3GEYJ103 10k R10 ERJ3GEYJ392 3 9k R11 ERJ3GEYJ102 1k R12 ERJ3GEYJ101 100 R13 ERJ3GEYJ513 51k R14 ERJ3GEYJ103 10k R15 ERJ3GEYJ562 5 6k R16 ERJ3GEYJ153 15k R17 ERJ3GEY0R00 0 R2...

Page 50: ...ERJ3GEYJ203 20k R78 ERJ3GEYJ392 3 9k R79 ERJ3GEYJ823 82k R80 ERJ3GEYJ222 2 2k R81 ERJ3GEYJ164 160k R82 ERJ3GEYJ103 10k R83 ERJ3GEYJ103 10k R84 ERJ3GEYJ103 10k R85 ERJ3GEYJ103 10k R86 ERJ3GEYJ473 47k R87 ERJ3GEYJ103 10k R88 ERJ3GEYJ103 10k R89 ERJ3GEYJ103 10k R90 ERJ3GEYJ274 270k R91 ERJ3GEYJ154 150k R92 ERJ3GEYJ103 10k R94 ERJ3GEYJ623 62k R95 ERJ3GEYJ392 3 9k R97 ERJ3GEYJ822 8 2k R98 ERJ3GEYJ104 1...

Page 51: ...4 100k R153 ERJ3GEYJ105 1M R154 ERJ3GEYJ470 47 R155 ERJ3GEYJ470 47 R156 ERJ3GEYJ470 47 R158 ERJ3GEYJ104 100k R160 PQ4R10XJ000 0 S R161 PQ4R10XJ000 0 S R166 ERJ3GEYJ470 47 R167 ERJ3GEYJ103 10k R170 ERJ3GEYJ102 1k R171 ERJ3GEYJ102 1k R172 ERDS2TJ105 1M R173 ERDS2TJ102 1k R174 ERDS2TJ102 1k R176 ERJ3GEY0R00 0 R180 ERJ3GEYJ563 56k R181 ERJ3GEYJ331 330 L8 ERJ3GEY0R00 0 CAPACITORS C1 ECEA1EK470 47 S C2 ...

Page 52: ...2 2 2 C43 ECUV1C104KBV 0 1 C44 ECUV1H332KBV 0 0033 C44 ECUV1H472KBV 0 0047 C45 ECUV1H333KDV 0 033 S C46 ECUV1H102KBV 0 001 C47 ECUV1H103KBV 0 01 S C48 ECUV1H223KBV 0 022 S C49 ECUV1H103KBV 0 01 S C50 ECEA1HU220 22 S C51 ECUV1H103KBV 0 01 S C52 ECUV1H223KBV 0 022 S C54 ECUV1H020CCV 2p C54 ECUV1H050CCV 5p C55 ECUV1H103KBV 0 01 S C56 ECUV1H050CCV 5p C58 ECUV1H682KBV 0 0068 C59 ECUV1H390JCV 39p C60 EC...

Page 53: ...05ZFV 1 C107 ECUV1C104ZFV 0 1 C108 ECUV1C104KBV 0 1 C109 ECUV1H182KBV 0 0018 C123 ECUV1C104KBV 0 1 C124 ECUV1C473KBV 0 047 C125 ECUV1H100DCV 10p S 24 2 Handset 24 2 1 CABINET AND ELECTRICAL PARTS Ref No Part No Part Name Description Remarks 101 PQJT10182Z CHARGE TERMINAL 102 PQGT14799ZA NAME LABEL 103 PQKF10535Y1 REAR CABINET S 104 PQKK10124Z1 BATTERY COVER S 105 PQKM10510R1 FRONT CABINET S 106 PQ...

Page 54: ...601 DIODE SI LEDS LED1 SC5E0192115 LED LED2 SC5E0192115 LED LED3 SC5E0192115 LED LED4 SC5E0192115 LED LED5 SC5E0192115 LED LED6 SC5E0192123 LED COILS L1 DC000600501 COIL L2 PQLQZM120J COIL L3 PQLQZM120J COIL L4 PQLQZK120J COIL L5 PQLQZK120J COIL L6 PQLQZK1R8J COIL L7 SH590121N75 COIL DPX1 BDFL0123111 COIL CERAMIC FILTERS CF1 BDFL107MJ51 CERAMIC FILTER CF2 BDFL0450E01 CERAMIC FILTER CRYSTAL OSCILLA...

Page 55: ...R24 ERJ3GEYJ472 4 7k R25 ERJ3GEYJ913 91k R26 ERJ3GEYJ103 10k R28 ERJ3GEYJ334 330k R29 ERJ3GEYJ152 1 5k R30 ERJ3GEYJ182 1 8k R34 ERJ3GEYJ224 220k R35 ERJ3GEYJ473 47k R36 ERJ3GEYJ202 2k R37 ERJ3GEYJ102 1k R38 ERJ3GEY0R00 0 R39 ERJ3GEYJ224 220k R40 ERJ3GEYJ101 100 R41 ERJ3GEYJ623 62k R42 ERJ3GEYJ223 22k R43 ERJ3GEYJ104 100k R44 ERJ3GEYJ393 39k R45 ERJ3GEYJ104 100k R47 ERJ3GEYJ222 2 2k R48 ERJ3GEYJ223...

Page 56: ...5 ERJ3GEYJ102 1k R86 ERJ3GEYJ104 100k R87 ERJ3GEYJ104 100k R91 ERJ3GEY0R00 0 R93 ERJ3GEYJ103 10k R94 ERJ3GEYJ334 330k R95 ERJ3GEYJ393 39k R96 ERJ3GEY0R00 0 R97 ERJ3GEYJ154 150k R98 ERJ3GEYJ475 4 7M R99 ERJ3GEYJ472 4 7k R101 ERJ3GEY0R00 0 R102 ERJ3GEYJ153 15k R103 ERJ3GEYJ125 1 2M R105 ERJ3GEYJ103 10k R106 ERJ3GEYJ820 82 R107 ERJ3GEYJ222 2 2k R108 ERJ3GEYJ102 1k R109 ERJ3GEYJ102 1k R110 ERJ3GEYJ102...

Page 57: ... ECUV1H151JCV 150p C40 ECUV1H103KBV 0 01 C41 ECUV1H270JCV 27p C42 ECEA1EK470 47 S C43 ECEA1HKA2R2 2 2 C44 ECUV1A105ZFV 1 C45 ECUV1C393KBV 0 039 C46 ECUV1H103KBV 0 01 C47 ECUV1H333KBV 0 033 S C48 ECEA1EK470 47 S C49 ECUV1H223KBV 0 022 S C50 ECUV1H103KBV 0 01 C51 ECEA1CKA100 10 C52 ECUV1H103KBV 0 01 C53 ECUV1H223KBV 0 022 S C54 ECUV1H020CCV 2p C54 ECUV1H220JCV 22p C55 ECUV1H103KBV 0 01 C56 ECUV1H020...

Page 58: ...IFT BOX 25 FOR SCHEMATIC DIAGRAM 25 1 Base Unit SCHEMATIC DIAGRAM Base Unit 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 Important Safety Notice Components identified by mark have special characteristics important for safety When replacing any of these...

Page 59: ... SCHEMATIC DIAGRAM Handset 27 1 Handset 27 2 RF Unit Handset 28 CIRCUIT BOARD Base Unit 28 1 Component View 28 2 Flow Solder Side View 29 CIRCUIT BOARD Handset 29 1 Component View 29 2 Flow Solder Side View H M KX TC1200NLB 59 ...

Page 60: ...R117 C120 R88 R32 C36 R176 R26 C40 R80 C48 R15 C59 R56 R53 R42 C49 R175 R182 C5 C14 R33 R54 R51 R155 R110 R112 R149 C101 R150 R139 R148 R86 R170 R44 C54 C61 R50 C11 R10 C18 C4 C28 R3 Q21 Q8 R5 R4 R74 R167 R156 R1 R58 R98 TP R93 C25 R7 C2 C9 R22 C43 C45 C37 C34 C93 C79 C121 C39 R13 R9 R8 C13 C24 R12 C23 C29 C19 C27 R36 C52 C46 Q14 Q17 Q3 C110 Q4 E9 E21 E23 E24 Q5 Q6 Q20 Q2 C51 R154 R40 R52 R45 R38 ...

Page 61: ...IC5 KX TC1200NLB CIRCUIT BOARD Component View Base Unit ...

Page 62: ...0 C48 R15 C59 R56 R53 R42 C49 R175 R182 C5 C14 R33 R54 R51 R155 R110 R112 R149 C101 R150 R139 R148 R86 R170 R44 C54 C61 R50 C11 R10 C18 C4 C28 R3 Q21 Q8 R5 R4 R74 R167 R156 R1 R58 R98 TP R93 C25 R7 C2 C9 R22 C43 C45 C37 C34 C93 C79 C121 C39 R13 R9 R8 C13 C24 R12 C23 C29 C19 C27 R36 C52 C46 Q14 Q17 Q3 C110 Q4 E9 E21 E23 E24 Q5 Q6 Q20 Q2 C51 R154 R40 R52 R45 R38 ZD5 R116 R130 R124 R138 R137 C63 R103...

Page 63: ...IC2 150Ω AF Volt Meter H Oscilloscope G Noise Squelch A Battery Low 47µF AF Generator ...

Page 64: ... R35 R25 C28 R13 R34 C52 R38 C59 E274 E273 Q6 Q5 E275 E276 C60 R47 R43 R97 C89 C2 C13 C21 R9 C6 C88 R49 C61 R50 R24 C40 C41 C44 C36 C35 R26 R40 R44 C57 C50 C62 R52 C55 IC1 TXPOWER TXGND 50Ω FM Deviation Meter Audio Analyzer Frequency Counter RF Millivolt Meter I J D E SSG 43 820MHz DC Volt Meter B TX VCO RF Volt Meter F DC Power Supply DC Volt Meter C RX VCO ...

Page 65: ...IC2 G Noise Squelch A Battery Low VDD CPU 40 CHG DET CPU 37 TX DATA CPU 36 TX DATA DV1 KX TC1200NLB CIRCUIT BOARD Component View Handset ...

Page 66: ...ROG 3 6 9 AUTO C22 R1 C24 C47 R35 R25 C28 R13 R34 C52 R38 C59 E274 E273 Q6 Q5 E275 E276 C60 R47 R43 R97 C89 C2 C13 C21 R9 C6 C88 R49 C61 R50 R24 C40 C41 C44 C36 C35 R26 R40 R44 C57 C50 C62 R52 C55 IC1 TXPOWER 2nd Mix RF IC 36 TXGND TX VCO RX VCO IF IN RF IC 32 V Bat RF IC 33 KX TC1200NLB CIRCUIT BOARD Flow Solder Side View Handset ...

Page 67: ... REGULATOR Q18 Q19 RF AMP Q3 Q4 T5 TX VCO Q5 T6 DV1 PLL OSC RF FILTER CF1 CF2 10 7MHz 450kHz ANTENNA LED Q21 LED1 RESET DTC Q9 CHARGE DTC Q7 EXP 17 14 TEL LINE AMP Q11 IC3 TEL LINE POWER SUPPLY RESET CHARGE CHARGE TERMINAL CHARGE CONTROL Q14 Q17 AC DOWN DTC Q8 DC IN 12V 150mA AC Adaptor COM DC 5V CONTROL LINE AUDIO SIGNAL TEL LINE SW T7 DIODE BRIDGE D2 D3 D4 D5 H S KX TC1200NLB BLOCK DIAGRAM BASE ...

Page 68: ...03 R126 1K R0603 R122 1K3 R0603 R141 5K1 R0603 C92 104 C0603 R123 15K R0603 R129 7K5 R0603 D7 2700V MPC28 28 R149 1K8 R0603 R148 10K R0603 R143 510K R0603 R119 82K R0603 Q19 TO 92 EBC C101 562 C0603 R150 620K R0603 C97 4 7UF 50V EC5 5 R171 1K R0603 D2 D10B R146 15K R0603 R60 22K R0603 C98 22UF 16V EC5 2 5 R127 NA R10 R91 150K R0603 R128 NA R10 D3 D10B D4 D10B R117 NA R0603 R157 NA R0603 Q16 NA SOT...

Page 69: ...603 R36 220K R0603 R38 100K R0603 R31 47K R0603 C54 2P C0603 R9 NA R0603 X1 11 15MHZ XTAL 10A R30 100K R0603 R25 270K R0603 C37 150P C0603 C44 4700P C0603 C24 223 C0603 C1 47UF 10V EC5 2 5 L10 1 2uH R52 4M7 R0603 C11 473 C0603 C35 18P C0603 C7 102 C0603 C38 10U 16V EC5 5 CF2 450E FILTER 2 1 5 2 3 4 C8 104 C0603 C15 2 2UF 50V EC5 5 R23 56K R0603 C16 27P C0603 C26 7P C0603 R14 R0603 10K CF1 10 7MHZ ...

Page 70: ...TX DATA POWER CONTROL Q4 RF AMP Q5 T5 TX VCO Q6 T6 DV1 PLL OSC RF FILTER CF1 CF2 ANTENNA LED Q8 LED 1 4 RESET Q11 DIODE BRIDGE D1 CHARGE DTC IC2 PING37 BUZZER Q7 BZ1 KEY BOARD EXP SPEAKER REC1 MIC MC1 CHARGE TERMINAL DIODE BRIDGE Q9 COM DC 3 9V CONTROL LINE AUDIO SIGNAL Base RX LOOP VC1 BATTERY 3 9V KX TC1200NLB BLOCK DIAGRAM HANDSET ...

Page 71: ... BATT1 3V6 300mA CNT2P 2 5 1 2 C73 104 C0603 Q11 SOT 23 R77 10K R0603 LED1 GREEN LED SQ LED2 GREEN LED SQ LED3 GREEN LED SQ LED4 GREEN LED SQ L5 12uH L7 5 Q9 SOT 23 IC2 32 31 30 29 27 26 25 24 1 2 3 4 5 6 7 8 9 10 11 28 33 12 13 14 15 16 17 18 19 20 21 22 23 34 35 36 37 38 39 40 41 42 43 44 P13 P12 P11 P10 P50 P67 P66 P65 P73 P72 P71 P70 P07 P06 P05 P04 P03 P02 P01 P51 P14 P00 TEST RESET XIN XOUT ...

Page 72: ... EBC C54 22P C0603 C42 47UF 10V EC5 2 5 T6 1960 IFT 7 C47 273 C0603 C61 104 C0603 DV1 VCD2 R44 39K R0603 R35 51K R0603 R39 220K R0603 R41 75K R0603 R7 NA R0603 X1 11 15MHZ XTAL 10A C56 5P C0603 R34 220K R0603 R28 560K R0603 C39 150P C0603 C46 103 C0603 C21 223 C0603 C1 47UF 10V EC5 2 5 L6 1 8uH L2 5 C36 18P C0603 C8 473 C0603 C7 104 C0603 C37 10U 16V EC5 2 5 CF2 450E FILTER 2 1 5 2 3 4 C6 102 C060...

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