Panasonic KX-TC1205RUB Service Manual Download Page 38

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16 CIRCUIT OPERATION

16.1. Outline

Base 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 (P.32).

•

RF IC:IC1

−

PLL Oscillator

−

Detection

−

Compress/ Expander

−

first/ second mixer

−

Amplifier for transmission and reception

•

Additionally,

−

Power Supply Circuit

−

Reset Circuit

−

Charge Circuit

−

Telephone Line Interface Circuit

Handset consist of the following ICs as shown in BLOCK DIAGRAM.

•

CPU: IC2

−

All data signals (forming/analyzing ACK or CMD signal*)

−

All interfaces (ex; LED, Key, Buzzer, Detector Circuit, Charge, Battery Low)

−

RAM for keeping the data (CH Number, ID Code, etc.)

•

RF IC:IC1

−

PLL Oscillator

−

Detector

−

Compress/Expander

−

first, second mixer

−

Amplifier for transmission and reception

*Refer to EXPLANATION OF CPU DATA COMMUNICATION (P.32).

KX-TC1205RUB / KX-TC1205R UW / KX-TC1205R US / KX-TC1205RUF

Summary of Contents for KX-TC1205RUB

Page 1: ...hts reserved Unauthorized copying and distribution is a violation of law KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF Cordless Phone Black Version White Version Silver Version Blue Version for Russia Telephone Equipment ORDER NO KM40204852C3 ...

Page 2: ...on 22 8 ADJUSTMENTS BASE UNIT 23 8 1 Test Mode Flow Chart Base Unit 23 8 2 How to change the channel 24 8 3 Adjustment 24 8 4 Adjustment Standard Base Unit 25 9 ADJUSTMENTS HANDSET 26 9 1 Test Mode Flow Chart Handset 26 9 2 How to change the channel 27 9 3 Adjustment 27 9 4 Adjustment Standard Handset 28 10 RF SPECIFICATION 30 10 1 Base Unit 30 10 2 Handset 30 11 HOW TO CHECK THE HANDSET SPEAKER 3...

Page 3: ...TS LOCATION BASE UNIT 50 22 CABINET AND ELECTRICAL PARTS LOCATION HANDET 51 23 ACCESSORIES AND PACKING MATERIALS 52 24 REPLACEMENT PARTS LIST 53 24 1 Base Unit 53 24 2 Handset 56 24 3 ACCESSORIES AND PACKING MATERIALS 58 25 FOR SCHEMATIC DIAGRAM 59 25 1 Base Unit SCHEMATIC DIAGRAM Base Unit 59 25 2 Handset SCHEMATIC DIAGRAM Handset 59 26 SCHEMATIC DIAGRAM Base Unit 60 26 1 Base Unit 60 26 2 RF Uni...

Page 4: ...1 BATTERY 1 1 Recharge 1 2 Battery information 4 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 5: ...2 BATTERY REPLACEMENT 5 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 6: ...3 LOCATION OF CONTROLS 3 1 Base Unit 3 2 Handset 6 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

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 7 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 8: ...8 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 9: ... 1 Adding Another Phone This unit will not function during a power failue To connect a standard telephone on the same line use a telephone T adaptor 9 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 10: ...5 OPERATIONS 5 1 Making Calls 5 2 Answering Calls 10 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 11: ...5 3 Storing Phone Numbers in Memory 5 4 Storing a Phone Number in the DIRECT Button 11 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 12: ...5 5 Dialing a Stored Number 5 6 Dialing a Stored Number in the DIRECT Button 12 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 13: ...5 7 FLASH Button 13 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 14: ... INSTRUCTIONS Show in Fig To remove Remove 1 Lower Cabinet Screws 2 6 12 A 4 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 14 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 15: ... 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 15 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 16: ...G GUIDE Cross Reference Check Power P 17 Bell Reception P 18 Check Battery Charge P 19 Check Link P 20 Check Handset Transmission P 22 Check Handset Reception P 22 16 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 17: ...r Supply Circuit P 39 Cross Reference Charge Circuit P 41 Note CPU IC2 Note CPU IC2 7 1 Check Power Each measurement points are shown in CIRCUIT BOARD Base Unit P 65 or CIRCUIT BOARD Handset P 67 17 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 18: ...hone Line Interface P 41 Note CPU IC2 7 2 Bell Reception Cross Reference Check Link P 20 Each measurement points are shown in CIRCUIT BOARD Base Unit P 65 or CIRCUIT BOARD Handset P 67 18 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 19: ...cuit P 39 Cross Reference Reset Circuit Handset P 45 Note CPU IC2 Note CPU IC2 7 3 Check Battery Charge Each measurement points are shown in CIRCUIT BOARD Base Unit P 65 or CIRCUIT BOARD Handset P 67 19 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 20: ... to Adjustment P 24 Note CPU IC2 RF IC IC1 7 4 Check Link Each measurement points are shown in CIRCUIT BOARD Base Unit P 65 or CIRCUIT BOARD Handset P 67 20 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 21: ... Refer to Adjustment P 27 Note CPU IC2 RF IC IC1 Each measurement points are shown in CIRCUIT BOARD Base Unit P 65 or CIRCUIT BOARD Handset P 67 21 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 22: ...eference Signal Route P 44 7 6 Check Handset Reception Cross Reference Signal Route P 44 Each measurement points are shown in CIRCUIT BOARD Base Unit P 65 or CIRCUIT BOARD Handset P 67 22 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 23: ...m C The transmit power outlet is low and the operating distance between the base unit and the handset is less than normal Make confirmation 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 adjustments in item G The unit does not link Make confirmation ...

Page 24: ... S G modulation frequency 1KHz dev 0KHz 2 Adjust T2 so that the reading of RF VTVM is the maximum value more than 20mV DPX1 T2 CF1 CF2 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 80mV 20mV 600Ω load IC1 Q11 G Line Input Modulation Confirmation 3ch Talk 1 Input via loop simulator 1 0KHz 80mV me...

Page 25: ... Volt Meter Confirmation of VCO voltage TX VCO RX VCO A B Loop SIMULATOR AF OSC AF Volt Meter F TXPOWER TXGND SSG Audio Analyzer RF Volt Meter Frequency Counter D C G FM Deviation Meter E 50Ω IC3 IC6 IC2 IC1 Note A H is refered to ADJUSTMENTS BASE UNIT P 23 KX TC1205RUB KX TC1205R UW KX TC1205R US KX TC1205RUF 25 ...

Page 26: ...nfirmation in item E 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 G The reception level is high or low Make confirmation item H The transmit level is high or low Make adjustments in item I Refer to Adjustment P 27 Unit condition 1 Remove the antenna lead wire from P C Board of the han...

Page 27: ...ensitivity Adjustment 2nd IF output 3ch Talk T3 1 Apply 60dBm output from S S G modulation frequency 1KHz dev 0KHz 2 Adjust T3 so that the reading of RF VTVM is more than 15mV DPX1 T3 IC1 CF1 CF2 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 so that the SSG output level is 105dBm IC1...

Page 28: ...ndard Handset Component View 150Ω AF Volt Meter H Oscilloscope G Noise Squelch A Battery Low 47µF AF Generator IC2 Note A I is refered to ADJUSTMENTS HANDSET P 26 KX TC1205RUB KX TC1205R UW KX TC1205R US KX TC1205RUF 28 ...

Page 29: ... 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 IC1 Note A I is refered to ADJUSTMENTS HANDSET P 26 KX TC1205RUB KX TC1205R UW KX TC1205R US KX TC1205RUF 29 ...

Page 30: ... to Remarks TX Frequency 39 875 MHz 0 1kHz ADJUSTMENTS HANDSET D at CH3 TX Power 4mW 3CH ADJUSTMENTS HANDSET E at CH3 Antenna soldering point 50Ω Load Data Modulation factor 4 0 kHz dev 8 0 kHz dev ADJUSTMENTS HANDSET J at CH3 MIC Modulation factor 1 5 kHz dev 0 3 kHz dev ADJUSTMENTS HANDSET I at CH3 MIC terminal 2 4mV Input SP Output level 120mV 30mV Refer to Adjustment P 27 11 HOW TO CHECK THE H...

Page 31: ...0 2 30 1250 39 8250 39 8250 30 1250 3 30 1750 39 8750 39 8750 30 1750 4 30 2250 39 9250 39 9250 30 2250 5 30 2750 39 9750 39 9750 30 2750 6 30 1000 39 8000 39 8000 30 1000 7 30 1500 39 8500 39 8500 30 1500 8 30 2000 39 9000 39 9000 30 2000 9 30 2500 39 9500 39 9500 30 2500 10 30 3000 40 0000 40 0000 30 3000 31 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 32: ...13 EXPLANATION OF CPU DATA COMMUNICATION 13 1 STAND BY TALK TALK STAND BY The channel is changed if the noise interferes with the conversation 32 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 33: ...13 2 Ringing 33 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 34: ...13 3 Changing the Channel 34 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 35: ...nsmitting and receiving of data 13 5 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 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 35 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 36: ...3 Q4 T5 TX VCO Q5 T6 DV1 PLL OSC RF FILTER CF1 CF2 10 7MHz 455kHz 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 RY1 LINE SEIZURE Q10 DIODE BRIDGE D2 D3 D4 D5 H S KX TC1205RUB W S F BLOCK DIAGRAM BASE UNI...

Page 37: ...OL 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 TC1205RUB W S F BLOCK DIAGRAM HANDSET KX TC1205RUB KX TC1205R UW KX TC1205R US KX TC1205RUF 37 ...

Page 38: ...lifier for transmission and reception Additionally Power Supply Circuit Reset Circuit Charge Circuit Telephone Line Interface Circuit Handset consist of the following ICs as shown in BLOCK DIAGRAM CPU IC2 All data signals forming analyzing ACK or CMD signal All interfaces ex LED Key Buzzer Detector Circuit Charge Battery Low RAM for keeping the data CH Number ID Code etc RF IC IC1 PLL Oscillator D...

Page 39: ...g the stand by mode the unit stops transmitting but receive thhe signal Also 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 3 6V nickel cadmium in the handset The memory of this unit is not backed up by the curreent from the telephone line The base unit DC power supply is regulated by Q18 the CPU pow...

Page 40: ...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 40 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 41: ...gs the AC ring volltage is transferred as follows JK1 3 T L6 R144 IC3D 12 13 14 C97 R148 Q20 IC2 24 BELL JK1 2 R L4 R120 R152 When the CPU DSP detects a ring signal and press the TALK Key on the handset Q6 turns on and then RY1 turns on thus providing an off hook condition active DC current flow through the circuit and the following singal flow is for the loop current T R160 L4 RY1 R107 T7 R116 D5...

Page 42: ...A signal from CPU Therefore the carrier frequency which is generated by TXVCO will be changing and Frequency modulated RF signal is generated and amplified by RF AMP Q3 Q4 T5 It pass through the Duplexer DPX1 and radiated from Antenna The signal is transmitted from the base unit and received by the handset antenna and amplified by RF amplifier Q1 through DPX1 as shown in BLOCK DIAGRAM HANDSET P 37...

Page 43: ...dio signal is output from RF IC DET OUT and passed through Expander process to reduce noise then voice signal is led to LINE AMP The signal is passed through TELEPHONE INTERFACE and Tel line RX data from Handset The data signal from handset ex Talk ACK COM is also included in 49 MHz band same as the voice data After second if filter the data signal is made square shape by data limiting AMP of the ...

Page 44: ...16 7 Signal Route Each signal route is as follows 44 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 45: ... Circuit Handset The power of handset is supplied by battery Whenever the battery is recharged or inserted the impulse at CHG becomes Reset signal through Q11 and sent to CPU Fig 4 Fig 5 45 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 46: ... 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 46 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 47: ...18 1 IC2 18 CPU DATA Base Unit 47 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 48: ...19 1 IC2 19 CPU DATA Handset 48 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 49: ...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 the soldering iron 20 3 Modification Procedure of Bridge 1 Re solder slightly ...

Page 50: ...21 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 50 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 51: ...22 CABINET AND ELECTRICAL PARTS LOCATION HANDET 51 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 52: ...23 ACCESSORIES AND PACKING MATERIALS 52 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 53: ...K LEVER for KX TC1205RUS S 6 PQKE10335Z2 HOOK LEVER for KX TC1205RUF S 7 PQKF10534Y1 LOWER CABINET for KX TC1205RUB KX TC1205RUF S 7 PQKF10534Y3 LOWER CABINET for KX TC1205RUW S 7 PQKF10534Y2 LOWER CABINET for KX TC1205RUS S 8 PQKM10509W1 UPPER CABINET for KX TC1205RUB S 8 PQKM10509W4 UPPER CABINET for KX TC1205RUW S 8 PQKM10509W3 UPPER CABINET for KX TC1205RUS S 8 PQKM10509W2 UPPER CABINET for KX...

Page 54: ...100 R38 ERJ3GEYJ823 82k R40 ERJ3GEYJ223 22k R41 ERJ3GEYJ473 47k R42 ERJ3GEYJ103 10k R43 ERJ3GEYJ393 39k Ref No Part No Part Name Description Remarks R44 ERJ3GEYJ104 100k R45 ERJ3GEYJ334 330k R46 ERJ3GEYJ222 2 2k R48 ERJ3GEYJ223 22k R49 ERJ3GEYJ473 47k R50 ERJ3GEYJ822 8 2k R51 ERJ3GEYJ182 1 8k R52 ERJ3GEYJ225 2 2M R53 ERJ3GEYJ153 15k R55 ERJ3GEYJ681 680 R56 ERJ3GEYJ222 2 2k R57 ERJ3GEYJ224 220k R58...

Page 55: ...C40 ECUV1H270JCV 27p C41 ECEA1EK470 47 S Ref No Part No Part Name Description Remarks C42 ECEA1HU2R2 2 2 C43 ECUV1C104ZFV 0 1 C44 ECUV1A105ZFV 1 C45 ECUV1H682KBV 0 0068 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 C53 ECUV1H120JCV 12p C54 ECUV1H020CCV 2p C55 ECUV1H103KBV 0 01 S C...

Page 56: ...110390405 TRANSISTOR SI Q2 SB110390405 TRANSISTOR SI Q3 SB110390405 TRANSISTOR SI Q4 SB010390608 TRANSISTOR SI Q5 SB110390405 TRANSISTOR SI Q6 SB110390405 TRANSISTOR SI Ref No Part No Part Name Description Remarks Q7 SB010390608 TRANSISTOR SI Q8 SB110390405 TRANSISTOR SI Q9 SB110390405 TRANSISTOR SI Q11 SB110390405 TRANSISTOR SI DIODES D1 SC15L414808 DIODE SI D2 SC15L414808 DIODE SI D3 SC15L414808...

Page 57: ...ECUV1H390JCV 39p Ref No Part No Part Name Description Remarks C4 ECUV1H270JCV 27p C5 ECUV1C104ZFV 0 1 C6 ECUV1H102KBV 0 001 C7 ECUV1C104ZFV 0 1 C8 ECUV1H473MDV 0 047 S C9 ECUV1H103KBV 0 01 C12 ECEA1HKA2R2 2 2 C13 ECUV1H270JCV 27p C14 ECUV1H103KBV 0 01 C15 ECEA1CKA100 10 C16 ECUV1C473KBV 0 047 C17 ECUV1H102KBV 0 001 C18 ECEA1HKA2R2 2 2 C21 ECUV1H223KBV 0 022 S C22 ECUV1H390JCV 39p C23 ECUV1H102KBV ...

Page 58: ... No Part No Part Name Description Remarks A1 PQJA10075Z TEL CORD A2 PQLV16CEZ AC ADAPTOR A3 PQQX13178Z INSTRUCTION BOOK A4 PQQW12509Z LEAFLET P1 PQPP10090Z POLY BAG for Base Unit P2 PQPP10091Z POLY BAG for Handset P3 PQPP10092Z POLY BAG P4 PQPK13522Z GIFT BOX 58 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF ...

Page 59: ...tant 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 25 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 the development of n...

Page 60: ...2 1K3 R0603 C127 47UF R141 5K1 R0603 C92 104 C0603 R123 15K R0603 R129 6K8 R0603 D7 2700V R149 1K8 R0603 R148 10K R0603 R143 510K R0603 R119 82K R0603 Q19 TO 92 EBC C101 562 C0603 R150 510K R0603 C97 4U7 50V EC5 5 R171 1K R0603 D2 D10B R146 15K R0603 R60 22K R0603 C98 220uF EC5 5 R91 150K R0603 R128 NA R10 D3 D10B D4 D10B R127 NA R10 Q16 SOT 23 R157 NA R0603 R139 10M R0603 R117 390K R0603 R187 27K...

Page 61: ...EC5 5 C53 12P C0603 Q3 SOT 23 ECB R43 39K R0603 DV1 VCD2 C61 104 C0603 R31 47K R0603 R38 82K R0603 R36 220K R0603 C125 10P C0603 R30 100K R0603 X1 11 15MHZ XTAL 10A R9 NA R0603 C54 2P C0603 C44 105 C0603 C37 150P C0603 R25 68K R0603 C24 223 C0603 R52 2M2 R0603 L10 1 2uH L10 C1 47UF 10V EC5 5 C35 18P C0603 C11 473 C0603 C8 104 C0603 CF2 450 FILTER 2 1 5 2 3 4 C38 1U 16V EC5 5 C7 102 C0603 CF1 10 7M...

Page 62: ... 1M R0603 Q7 STO 23 BATT1 3V6 300mA CNT2P 2 5 1 2 C73 104 C0603 Q11 SOT 23 R79 1M R0603 R77 10K R0603 LED1 GREEN LED SQ LED2 LED3 GREEN LED SQ GREEN LED SQ LED4 GREEN LED SQ L5 12uH L7 5 Q9 SOT 23 K6 PAUSE 1 2 K9 0 1 2 K12 8 1 2 K18 2 1 2 K2 FLASH 1 2 IC2 QFP 44P 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 P...

Page 63: ...100P C0603 R106 150 R0603 C47 682 C0603 T6 1960 IFT 7 C42 47U 10V EC5 2 5 C54 10P C0603 Q5 SOT 23 EBC R44 39K R0603 DV1 VCD2 C61 104 C0603 R41 68K R0603 R39 220K R0603 R35 47K R0603 R34 220K R0603 C56 1P C0603 X1 10 245MHZ XTAL 10A R7 NA R0603 C46 NA C0603 C39 150P C0603 R28 120K R0603 C21 223 C0603 L6 1 8uH L7 5 C1 47UF 10V EC5 2 5 C8 473 C0603 C36 18P C0603 C6 102 C0603 CF2 455E FILTER 2 1 5 2 3...

Page 64: ...KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF 64 ...

Page 65: ...28 CIRCUIT BOARD Base Unit 28 1 Component View IC5 KX TC1205RUB W S F CIRCUIT BOARD Component View Base Unit KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF 65 ...

Page 66: ...T CPU 27 RX DATA CPU 10 RX DATA RF IC 23 CHG DET CPU 18 TX DATA CPU 17 CHG LD CPU 26 DETOUT RF IC 27 TX VCO 2nd Mix RF IC 36 IF IN RF IC 32 RX VCO 12V RING TIP GND TXPOWER TXGND TX DATA DV1 IC3 IC4 IC2 IC1 KX TC1205RUB W S F CIRCUIT BOARD Flow Solder Side View Base Unit KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF 66 ...

Page 67: ...dset 29 1 Component View G Noise Squelch A Battery Low VDD CPU 40 CHG DET CPU 37 TX DATA CPU 36 TX DATA DV1 IC2 KX TC1205RUB W S F CIRCUIT BOARD Component View Handset KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF 67 ...

Page 68: ...older Side View TXPOWER 2nd Mix RF IC 36 TXGND TX VCO RX VCO IF IN RF IC 32 V Bat RF IC 33 IC1 KX TC1205RUB W S F CIRCUIT BOARD Flow Solder Side View Handset KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF 68 ...

Page 69: ...69 KX TC1205RUB KX TC1205RUW KX TC1205RUS KX TC1205RUF I KXTC1205RUB KXTC1205RUW KXTC1205RUS KXTC1205RUF ...

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