Matsushita Electric KX-TC1461LAB Service Manual Download Page 70 | Manualshive

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(RF IC)

1

2

3

RE/PA

4

5

6

TALK

FLASH

OFF

7

8

9

CHAN

0

#

LOUD

AUTO

RECEIVER

TX AUDIO

Tx VCC

Tx_PWR

Rx_PWR

CHG_DET

E_MUTE

R1 - 3

C1 - 4

Buzz

RESET

Rx VCC

RINGER
ON/OFF

Power-down

VDD

RX_VCO
Q506

RF Module

MICROPHONE

IF FILTER
CF501

MIXER
Q512

LNA: Low Noise Amp
Q555, Q556

DUPLEXER

ANTENNA

LPF

Doubler/Buffer
Q510

TX_VCO
Q509

Q2

RX ON/OFF

Q4, Q1

Power-down

Q3, Q6

BUZZER CKT.

RESET & CHARGE

CIRCUIT

3.6V

BATTERY

R2
0R

Q5

TX ON/OFF

STB

D

ATA

CLK

REF_CLK

RX_DATA

TX_DATA

PD-IN

X1

4MHz

VCC

KX-TC1461LAB/W: BLOCK DIAGRAM (HANDSET)

37

46

15

SP OUT 2

1st IF_IN

RX PD

SFC 2

SP OUT 1

MIC_IN

Key

16

4

10

15

18

11

5

27

25

16

17

1

2

12

23

9

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Summary of Contents for KX-TC1461LAB

Page 1: ...pment KX TC1461LAB KX TC1461LAW 900MHz Cordless Phone Black Version White Version for Latin America SPECIFICATIONS 2002 Kyushu Matsushita Electric Co Ltd All rights reserved Unauthorized copying and d...

Page 2: ...1 STANDARD BATTERY LIFE 1 1 Recharge 1 2 Battery Information After your Panasonic battery is fully charged 2...

Page 3: ...he handset and the base unit charge contacts with a soft dry cloth Clean if the unit is subject to grease dust or high humidity Otherwise the battery may not charge properly If the battery is fully ch...

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

Page 5: ...2 3 Battery Replacement 5...

Page 6: ...3 CONNECTIONS 6...

Page 7: ...or 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 1 Adding Another...

Page 8: ...4 OPERATIONS 4 1 Making Calls 4 2 Answering Calls 5 DISASSEMBLY INSTRUCUTIONS 8...

Page 9: ...in Fig To remove Remove 1 Lower Cabinet Screws 2 6 8 A 4 2 Locator P C Board Screws 2 3 6 B 4 Locator P C Board 3 RF P C Board Screws 2 6 C 3 RF P C Board 4 Main P C Board Screws 2 3 6 D 4 Main P C Bo...

Page 10: ...emove Remove 5 Rear Cabinet Battery compartment cover 6 Screws 2 6 8 E 2 7 8 Antenna Screw 2 6 8 F 1 RF P C Board Screws 2 6 G 2 RF P C Board 9 Main P C Board Screws 2 6 H 2 Main P C Board 6 HOW TO RE...

Page 11: ...direction of arrow 1 then pull the top of TEL JACK forward as shown arrow 2 until the hooks click Refer to Fig 1 2 Remove TEL JACK pulling just above in the direction of arrow 3 Refer to Fig 2 7 TROUB...

Page 12: ...on Check Battery Charge Check Link Check Handset Transmission Check Handset Reception 7 1 Check Power Cross Reference Reset Circuit Power Supply Circuit CONNECTIONS Note CPU IC3 Cross Reference Charge...

Page 13: ...own in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset 7 2 Bell Reception Cross Reference Telephone Line Interface Note CPU IC3 Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT...

Page 14: ...ence Charge Circuit Power Supply Circuit CONNECTIONS Note CPU IC3 Cross Reference Reset Circuit Charge Circuit Note CPU U1 Each measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD...

Page 15: ...7 4 Check Link Refer to Adjustment Note CPU IC3 RF IC IC1 15...

Page 16: ...measurement points are shown in CIRCUIT BOARD Base Unit or CIRCUIT BOARD Handset Refer to Adjustment Note CPU U1 RF IC IC1 Each measurement points are shown in RF Module 7 5 Check Handset Transmissio...

Page 17: ...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...

Page 18: ...that the reading of the frequency counter is 1ch Freq 902 1MHz 9KHz at the antenna D TX Power Confirmation CH1 Talk T5 Confirm so that the reading of the RF VTVM is 7 2dBm at TP510 E RX Sensitivity C...

Page 19: ...SIG_OUT changes from Low to High 2 Confirm that the SSG output level is 70 10 15dBm I Data Modulation confirmation TX Data Confirm for 65 10KHz FM Deviation Meter reading The connection of adjustment...

Page 20: ...nit 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...

Page 21: ...Note Refet to CIRCUIT BOARD Handset Signal Route 9 2 Adjustment 21...

Page 22: ...on reading of Audio Analyzer is less than 25 Adjustment Items Test Mode Adjustment Point Procedure F RSSI Confirmation Talk 1 Measure the SSG output level when the SIG_OUT changes from Low to High mod...

Page 23: ...2 25 926 05 926 05 902 25 5 902 30 926 10 926 10 902 30 6 902 35 926 15 926 15 902 35 7 902 40 926 20 926 20 902 40 8 902 45 926 25 926 25 902 45 9 902 50 926 30 926 30 902 50 10 902 55 926 35 926 35...

Page 24: ...03 90 927 70 927 70 903 90 38 903 95 927 75 927 75 903 95 39 904 00 927 80 927 80 904 00 40 904 05 927 85 927 85 904 05 11 BLOCK DIAGRAM Base Unit 12 CIRCUIT OPERATION 12 1 Outline Base unit consists...

Page 25: ...ut to Q6 Q7 for making reset signal Refer to the below waveform Fig 101 Fig 102 12 4 Charge Circuit Circuit Operation When charging the handset on the base unit the charge current is as follows DC 9V...

Page 26: ...signal and press the TALK Key onto the handset Q3 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 L9 R5...

Page 27: ...and Frequency modulated RF signal is generated and amplified by RF AMP Doubler Q510 It pass through the Duplexer FL501 and radiated from Antenna Handset detects the voice signal or data signal in the...

Page 28: ...NDSET 14 1 Outline Handset consist of the following ICs as shown in BLOCK DIAGRAM CPU U1 All data signals forming analyzing ACK or CMD signal All interfaces ex LED Key Buzzer Detector Circuit Charge B...

Page 29: ...Detector Circuit Operation Battery Low and Power Down are detected by RF IC which check the voltage from battery Shortly every detected blocks are inseide of RF IC The detected voltage is as follows...

Page 30: ...ed 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 80 W iron but beginner might damage foil by overheating Flux HI115 Sp...

Page 31: ...rtant 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 solderi...

Page 32: ...15 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 16 CPU DATA Base Unit 16 1 IC3 32...

Page 33: ...er 18 P72 RESERVED H O 19 P17 FLASHOPT L I Flash time option H 600ms L 20 P16 COMCLK L O Combo chip clock normal low output Pull low through 10k 21 P15 COMDATA L O Combo chip data normal low output 22...

Page 34: ...BE H ENABLE 16 P74 DATA H O COMBO DATA 17 P73 CLK H O COMBO CLOCK 18 P72 TX_PWR H O TX POWER CONTROL L TX POWER 19 P17 C4 L O Keyout 4 normal low output 20 P16 C3 L O Keyout 3 normal low output 21 P15...

Page 35: ...L BL PD threshold selection 13 DOUT Data amp output 41 VSS RX counter Gnd 14 GND2 Ground 2 42 FIN_RX RX counter input 15 SPOUT2 SP amp output 1 43 SIGOUT LD RSSI ND output 16 SPOUT1 SP amp output 2 44...

Page 36: ...20 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 36...

Page 37: ...21 ACCESSORIES AND PACKING MATERIALS 37...

Page 38: ...22 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 22 1 Base Unit 22 2 Handset 38...

Page 39: ...nd 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 safe...

Page 40: ...r KX TC1461LAW S 5 407400020376 FIXING PLATE for KX TC1461LAB S 5 407400020372 FIXING PLATE for KX TC1461LAW S 6 408400020370 HOOK LEVER for KX TC1461LAB S 6 408400020371 HOOK LEVER for KX TC1461LAW S...

Page 41: ...4 NOTICE 1 Q5 203394090027 TRANSISTOR SI Refer to 23 4 NOTICE 1 S Q6 203394090000 TRANSISTOR SI S Q7 203394090000 TRANSISTOR SI S Q8 203396090004 TRANSISTOR SI S Q9 203800010300 TRANSISTOR SI S Q10 20...

Page 42: ...k R22 ERJ3GEYJ104 100k R23 ERJ3GEYJ224 220k R24 ERJ3GEYJ561 560 R25 ERDS25TJ220 22 R26 ERJ3GEYJ105 1M R27 ERJ3GEYJ563 56k R28 ERJ3GEYJ103 10k R29 ERJ3GEYJ223 22k R30 ERJ3GEYJ122 1 2k R31 236201025200...

Page 43: ...R98 ERJ3GEYJ474 470k R99 236243025200 240k S AR1 ERJ3GEYJ473 47k AR5 236203025200 200k S AR5 236243025200 240k S AR5 236752025200 75k S AR5 ERJ3GEYJ104 10k AR5 ERJ3GEYJ154 150k AR5 ERJ3GEYJ184 180k AR...

Page 44: ...0022 C35 ECUV1C104ZFV 0 1 C60 PQCUV1C225ZF 2 2 C62 ECUV1H103KBV 0 01 C63 ECUV1H103KBV 0 01 C64 ECUV1C104ZFV 0 1 C65 ECUV1H220JCV 22P C66 ECUV1H180JCV 18P C73 ECUV1C104ZFV 0 1 C74 ECUV1C104ZFV 0 1 AE1...

Page 45: ...502 253200830200 COIL S L503 253250830200 COIL S L504 252330201801 COIL S RESISOTRS R1 ERJ3GEYJ153 15k R2 ERJ3GEY0R00 0 R3 ERJ3GEYJ273 27k R4 ERJ3GEYJ104 100k R6 ERJ3GEYJ152 1 5k R8 ERJ3GEYJ224 220k R...

Page 46: ...00 R562 ERJ3GEYJ124 120k R569 ERJ3GEYJ103 10k R571 ERJ3GEYJ102 1k R577 ERJ3GEYJ101 100 R578 ERJ3GEYJ274 270k R585 ERJ3GEY0R00 0 R593 ERJ3GEYJ102 1k R604 ERJ3GEYJ471 470 R606 ERJ3GEYJ123 12k R609 ERJ3G...

Page 47: ...001 C503 ECUV1H680JCV 68P C504 PQCUV1E104MD 0 1 S C505 ECUV1H680JCV 68P C519 ECUV1H070CCV 7P C521 PQCUV1E104MD 0 1 S C526 PQCUV1E104MD 0 1 S C527 ECUV1H030CCV 3P C530 ECUV1H680JCV 68P C533 ECUV1H100DC...

Page 48: ...C583 ECUV1H330JCV 33P C586 ECUV1H070CCV 7P C590 ECUV1H010CCV 1P C591 ECUV1H123KBV 0 012 C592 PQCUV1E104MD 0 1 S C593 ECUV1H680JCV 68P C595 ECUV1H100DCV 10P C597 ECUV1H010CCV 1P C598 ECUV1H020CCV 2P C5...

Page 49: ...112 461001000000 SPEAKER SHEET S 113 464100000000 RUBBER S 114 470216031000 CUSHION URETHANE FORM S 115 470312501000 SPACER S 116 472310551000 PET SHEET S 117 PQWBTC1461 BATTERY 118 151021208301 CHAR...

Page 50: ...GEYJ154 150k R6 ERJ3GEYJ683 68k R7 ERJ3GEYJ105 1M R8 ERJ3GEYJ102 1k R11 ERJ3GEY0R00 0 Refer to 23 4 NOTICE 1 R11 NOT USED NOT USED Refer to 23 4 NOTICE 1 R12 ERJ3GEYJ473 47k R13 NOT USED NOT USED Refe...

Page 51: ...l Number Refer to 23 4 NOTICE 2 R69 NOT USED for KX TC1461LAW From 15164 units of Serial Number Refer to 23 4 NOTICE 2 CAPACITORS C1 ECUV1C104ZFV 0 1 C2 220100981300 0 1 S C3 ECUV1H102KBV 0 001 C8 PQC...

Page 52: ...27k R4 ERJ3GEYJ104 100k R5 ERJ3GEYJ104 100k R6 ERJ3GEYJ152 1 5k R8 ERJ3GEYJ474 470k R9 ERJ3GEYJ274 270k R10 ERJ3GEYJ153 15k for KX TC1461LAB Until 102059 units of Serial Number Refer to 23 4 NOTICE 2...

Page 53: ...R520 ERJ3GEYJ103 10k 53...

Page 54: ...9 ERJ3GEYJ123 12k R610 236512025200 51k S R611 ERJ3GEYJ273 27k R619 ERJ3GEY0R00 0 R621 ERJ3GEY0R00 0 R622 ERJ3GEY0R00 0 R16A 236432025200 43k S R16A 236512025200 51k S R16A 236622025200 62k S R16A 236...

Page 55: ...C521 ECUV1H103KBV 0 01 C526 ECUV1H103KBV 0 01 C527 ECUV1H030CCV 3P C530 ECUV1H680JCV 68P C533 ECUV1H100DCV 10P S C534 PQCUV1C105ZF 1 C535 ECUV1C104ZFV 0 1 C536 ECUV1H123KBV 0 012 C537 PQCUV1E104MD 0...

Page 56: ...7472054900 VARIABLE RESISTOR S 23 3 ACCESSORIES AND PACKING MATERIALS Ref No Part No Part Name Description Remarks A1 651500720600 TEL CORD A2 PQWATC1461M AC ADAPTOR A3 435207101000 CHARGE CARD S A4 P...

Page 57: ...set 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 25...

Page 58: ...28 3 RF Module M KXTC1461LAB AK KXTC1461LAW AK 58...

Page 59: ...KX TC1461LAB W BASE UNIT Locator Component View...

Page 60: ...KX TC1461LAB W BASE UNIT Locator Flow Solder Side View...

Page 61: ...DC Power Supply Battery...

Page 62: ...IC1 TP809 TXVCO TP808 RXVCO TP510 1 14 15 28 29 42 43 56 Audio Analyzer Oscillo scope AF Generator GND SIG_OUT MIC_IN E G D M B FM Deviation Meter H I Spectrum Analyzer D Frequency Counter C D M A...

Page 63: ...U1 X1 KX TC1461LAB W HANDSET Main Flow Solder Side View 1 14 28 15 Rec_O P_B CH_DET U1 25...

Page 64: ...IC1 KX TC1461LAB W HANDSET RF Module TP809 TXVCO TP808 RXVCO TP510 Ext_out VR1 Pre_out Tx data DET_out SIG_out 1 14 15 28 29 42 43 56...

Page 65: ...KX TC1461LAB W HANDSET Main Component View SP_OUT...

Page 66: ...U1 X1 KX TC1461LAB W HANDSET Main Flow Solder Side View Oscilloscope SIG_OUT F AF Generator MIC_IN 1 15...

Page 67: ...IC3 AF OSC LOOP SIMULATOR Audio Analyzer E F Tip Ring...

Page 68: ...IC1 14 15 28 29 42 43 56 1 TP809 TXVCO TP808 RXVCO TP510 D M A FM Deviation Meter G I Frequency Counter C SSG 925 9MHz Spectrum Analyzer D D M B H Oscillo scope SIG_OUT GND...

Page 69: ...IXER Q512 RF Module LNA Low Noise Amp Q555 Q556 DUPLEXER ANTENNA LPF FL501 9V DC 9V To H S Q2 Q10 CHARGE DETECT Q9 VOLTAGE REGULATOR 5V Doubler Buffer Q510 TX_VCO Q509 VD502 Q8 TX ON OFF TX AUDIO 39 3...

Page 70: ...HONE IF FILTER CF501 MIXER Q512 LNA Low Noise Amp Q555 Q556 DUPLEXER ANTENNA LPF Doubler Buffer Q510 TX_VCO Q509 Q2 RX ON OFF Q4 Q1 Power down Q3 Q6 BUZZER CKT RESET CHARGE CIRCUIT 3 6V BATTERY R2 0R...

Page 71: ...B IC2 A LED GREEN IN USE CHARGE IC3 40dBm 22mVp p Output 11dBm 22dBm 172mVp p 900mVp p 4 5Vp p Reception Input f 1kHz 686mVp p 10dBm 600 5V 4 5V 5V KX TC1461LAB W SCHEMATIC DIAGRAM Base Unit Main To...

Page 72: ...TX RX IC1 1 75V 0 2V at CH1 10 7 MHz Tx VCO 1 8V 0 15V at CH1 KX TC1461LAB W SCHEMATIC DIAGRAM Base Unit RF Module 25KHz Dev 1KHz Tone Input 25KHz Dev 1KHz Tone Output 10 7 MHz Rx VCO Tx VCO...

Page 73: ...TX RX U1 3Vp p 490mVp p Volume Input 1kHz 19 6mVp p 3 6V 3 3V 3 3V 3 3V 3 0V 300mVp p KX TC1461LAB W SCHEMATIC DIAGRAM Handset Main...

Page 74: ...TX RX IC1 1 75V 0 2V at CH1 Tx VCO 1 8V 0 15V at CH1 KX TC1461LAB W SCHEMATIC DIAGRAM Handset RF Module 25KHz Dev 1KHz Tone Input 25KHz Dev 1KHz Tone Output 10 7 MHz 10 7 MHz Rx VCO Tx VCO...

Page 75: ...IC2 KX TC1461LAB W BASE UNIT Main Component View L seize 1 7 8 14 Power Down Tx Down SIG_OUT...

Page 76: ...IC3 KX TC1461LAB W BASE UNIT Main Flow Solder Side View 1 28 14 15 LED P1 IC3 12 CHG_DET IC3 25 Ring_DET IC3 26...

Page 77: ...IC1 KX TC1461LAB W BASE UNIT RF Module D_OUT D_IN Tx Data REC_O P_A 14 15 28 29 42 43 56 1 TP809 TXVCO TP808 RXVCO TP510...

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