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Matsushita Electric KX-TC1461LAB Service Manual

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ORDER NO. KM40203843C3
Telephone Equipment
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 distribution is a violation of law.
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Summary of Contents for Matsushita Electric KX-TC1461LAB

  • Page 1 ORDER NO. KM40203843C3 Telephone Equipment 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 distribution is a violation of law.

  • Page 2: Standard Battery Life

    1. STANDARD BATTERY LIFE 1.1. Recharge 1.2. Battery Information After your Panasonic battery is fully charged:...

  • Page 3: Location Of Controls

    Operation Operating time While in use (TALK) Up to about 5 hours While not in use (Standby) Up to about 5 days - The battery operating time may vary depending on usage conditions and ambient temperature. - Clean the handset and the base unit charge contacts with a soft, dry cloth.
  • Page 4 2.2. Handset...

  • Page 5: Battery Replacement

    2.3. Battery Replacement...
  • Page 6 3. CONNECTIONS...

  • Page 7: Adding Another Phone

    - USE ONLY WITH Panasonic AC ADAPTOR PQWATC1461M. - The AC adaptor must remain 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.
  • Page 8 4. OPERATIONS 4.1. Making Calls 4.2. Answering Calls 5. DISASSEMBLY INSTRUCUTIONS...
  • Page 9 Show in Fig. To remove. Remove. Lower Cabinet Screws (2.6 × 8)....... (A) × 4 Locator P.C.Board Screws (2.3 × 6)....... (B) × 4 Locator P.C.Board RF P.C.Board Screws (2 × 6)....... (C) × 3 RF P.C.Board Main P.C.Board Screws (2.3 × 6)....... (D) × 4 Main P.C.Board...
  • Page 10 Show in Fig. To remove. Remove. Battery compartment cover. Rear Cabinet Screws (2.6 × 8)......(E) × 2 Antenna Screw (2.6 × 8)......(F) × 1 RF P.C.Board Screws (2 × 6)......(G) × 2 RF P. C. Board. Main P.C.Board Screws (2 × 6)......(H) × 2 Main P.C.Board 6.

  • Page 11: Troubleshooting Guide

    1. Keep 2 hooks for TEL JACK fixing open in the 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.

  • Page 12: Check Power

    Bell Reception 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 Circuit...

  • Page 13: Check Battery Charge

    Note: CPU: U1 * : Each measurement points are shown 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 BOARD...
  • Page 14 Cross Reference: 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 (Handset)

  • Page 15: Check Link

    7.4. Check Link **: Refer to Adjustment Note: CPU: IC3 RF IC: IC1...

  • Page 16: Check Handset Transmission

    *: Each 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 Transmission...

  • Page 17: Check Handset Reception

    Cross Reference: Signal Route 7.6. Check Handset Reception Cross Reference: Signal Route 8. ADJUSTMENTS (BASE UNIT) If your unit have below symptoms, adjust or confirm each item using remedy column from the table. Symptom Remedy* The base unit dose not respond to a call from handset. Make adjustments in item The base unit dose not transmit or the transmit frequency is off.
  • Page 18 Note: **: Refer to the above table. 8.2. Adjustment Adjustment Test *Procedure Adjustment Items Mode Point RX VCO L502 Adjust L502 so that the reading of the Digital Voltmeter is 1.75V ± 0.2V. (at TP808) Talk TX VCO L503 Adjust L503 so that the reading of the Digital Voltmeter is 1.8V ± 0.15V. (at TP809) Talk TX Frequency Adjustment VC1 so that the reading of the frequency counter is 1ch Freq.

  • Page 19: Adjustment Standard (Base Unit)

    Adjustment Test *Procedure Adjustment Items Mode Point 1. Input via loop simulator 1.0KHz, -10dBm (measured at T-R) signal. Line Input 2. Confirm so that the reading of FM Deviation Meter is 25KHz ± 1KHz. Modulation Talk Confirmation RSSI Hold the “Locator” key for 5 seconds to enter to RSSI test. 1.
  • Page 20 Symptom Remedy* The movement of Battery Low Indicator is wrong. Make confirmation in item The base unit does not respond to a call from the handset. Make adjustments in item The base unit does not transmit or the transmit frequency is off. Make adjustments in item The transmit frequency is off.
  • Page 21 Note: Refet to CIRCUIT BOARD (Handset) Signal Route 9.2. Adjustment...
  • Page 22 Adjustment Test Procedure Adjustment Items Mode Point 1. Adjust L503 so that the reading of the Digital Voltmeter is 1.80V ± 0.15V. (at TX VCO Stand- L503 TP809) 1. Adjust L502 so that the reading of the Digital Voltmeter is 1.75V ± 0.2V. RX VCO Stand- L502...

  • Page 23: Adjustment Standard (Handset)

    6.8k 2.2k Not Used 7mVrms 3.8mVrms Refer to the Parts List MAIN P.C.BOARD PARTS (Handest) () and RF P.C.BOARD PARTS (Handset) () 9.3. Adjustment Standard (Handset) (Main, component View) (RF Module) 10. FREQUENCY TABLE (MHz) BASE UNIT HANDSET Channel Transmit Frequency Receive Frequency Transmit Frequency Receive Frequency 902.10 925.90 925.90...
  • Page 24 903.25 927.05 927.05 903.25 903.30 927.10 927.10 903.30 903.35 927.15 927.15 903.35 903.40 927.20 927.20 903.40 903.45 927.25 927.25 903.45 903.50 927.30 927.30 903.50 903.55 927.35 927.35 903.55 903.60 927.40 927.40 903.60 903.65 927.45 927.45 903.65 903.70 927.50 927.50 903.70 903.75 927.55 927.55...

  • Page 25: Reset Circuit

    The power supply to the CPU (Digital, Analog) and RF IC from AC Adaptor (+9V) as shown in diagram in Reset Circuit 12.3. Reset Circuit After power supply from AC adaptor, the VDD (5.0V) is input to Q6, Q7 for making reset signal. Refer to the below waveform.

  • Page 26: Telephone Line Interface

    12.5. Telephone Line Interface Function: - Bell signal detection - ON/OFF hook and pulse dial circuit - Side tone circuit Bell signal detection and OFF HOOK circuit: In the idle mode, Q3 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 telephone rings), the AC ring voltage is transferred as follows: IC2-A, B...
  • Page 27 12.6. Transmitter/Receiver Base Unit and Handset are mainly consists of RF (Radio Frequency) IC(IC1) and CPU(IC3). Base 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 12.6.1.

  • Page 28: Signal Route

    of the RF IC. RX data is output to CPU (RX Data). 12.7. Signal Route Each signal route is as follows. 13. BLOCK DIAGRAM (Handset) 14. CIRCUIT OPERATION (HANDSET) 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;...

  • Page 29: Battery Low / Power Down Detector

    14.2. Reset Circuit/Charge Circuit The power of handset is supplied by battery. Whenever the battery is recharged or inserted, the impulse at CHG1 becomes Reset signal through D11, and sent to CPU. *Refer to Charge Circuit <Fig. 201> 14.3. Battery Low / Power Down Detector Circuit Operation: “Battery Low”...

  • Page 30: How To Replace Flat Package Ic

    15. HOW TO REPLACE FLAT PACKAGE IC 15.1. 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 80 W iron, but beginner might damage foil by overheating.) - Flux...
  • Page 31 *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.

  • Page 32: Cpu Data (Base Unit)

    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...

  • Page 33: Cpu Data (Handset)

    Pin Port Name Label Init. Description Remark XOUT 4MHz crystal oscillator XOUT 4MHz crystal oscillator TEST Must be connected to Vss TEST Carrier detect input (combo chip H: carrier present RSSIN sigout) PAGE KEY L: KEY PRESSED PAGE recradle control, DTMF out5 DTMF5 DTMF out4 DTMF4...
  • Page 34 Port Label Init Description Remark XOUT 4MHz crystal oscillator XOUT 4MHz crystal oscillator TEST Must be connected to Vss TEST Keyin 3 Keyin 2 Keyin 1 RSSI Carrier detect input (combo chip H: carrier present sigout) TX_DATA TX path data output RX_PWR RX power control for LNA &...

  • Page 35: Explanation Of Ic Terminals (Rf Unit)

    18. EXPLANATION OF IC TERMINALS (RF Unit) 18.1. IC1 Pin No. Pin Description Pin No. Pin Description Enable input QUAD_IN FM detector input CDET COMP detection QUAD_OUT IFamp2 output SF_OUT Splatter filter output NDET Noise Detection SFC2 External splatter filter RSSI_DET RSSI Detection SFC1...

  • Page 36: Cabinet And Electrical Parts Location

    20. CABINET AND ELECTRICAL PARTS LOCATION (HANDSET)

  • Page 37: Accessories And Packing Materials

    21. ACCESSORIES AND PACKING MATERIALS...

  • Page 38: Terminal Guide Of The Ics, Transistors And Diodes

    22. TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 22.1. Base Unit 22.2. Handset...

  • Page 39: Replacement Parts List

    23. REPLACEMENT PARTS LIST 1. RTL (Retention Time Limited) Note: The marking (RTL) indicates that the Retention Time is limited for this item. After the discontinuation of this assembly in production, the item will continue to be available for a specific period of time. The retention period of availability depends on the type of assembly and the laws governing parts and product retention.
  • Page 40 FIXING PLATE (for KX-TC1461LAB) 407400020372 FIXING PLATE (for KX-TC1461LAW) 408400020370 HOOK LEVER (for KX-TC1461LAB) 408400020371 HOOK LEVER (for KX-TC1461LAW) 408400020376 HANDSET LOCATOR BUTTON (for KX-TC1461LAB) 408400020372 HANDSET LOCATOR BUTTON (for KX-TC1461LAW) S 410207100000 KEYBOARD SWITCH 432207511010 NAME LABEL (for KX-TC1461LAB) 432207511030...
  • Page 41 PCB1 PQWP11461LAH MAIN P.C.BOARD ASS'Y (RTL) (ICS) 271002401005 273010114012 IC (for KX-TC1461LAB) (Until 102059 units of Serial Number) Refer to 23.4. NOTICE (2) 273023714112 IC (for KX-TC1461LAB) (From 102060 units of Serial Number) Refer to 23.4. NOTICE (2) 273010114012 IC (for KX-TC1461LAW) (Until 15163 units of Serial Number) Refer to 23.4.
  • Page 42 Ref. No. Part No. Part Name & Description Remarks PQ4R10XJ471 ERJ3GEYJ104 100k ERD25TJ154 150k NOT USED NOT USED Refer to 23.4. NOTICE (1) ERJ3GEYJ472 4.7k Refer to 23.4. NOTICE (1) NOT USED NOT USED Refer to 23.4. NOTICE (1) ERJ3GEYJ223 22k Refer to 23.4.
  • Page 43 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ152 1.5k ERJ3GEYJ103 231129100600 ERDS25TJ2R7 Refer to 23.4. NOTICE (1) ERDS2TJ000 Refer to 23.4. NOTICE (1) ERJ3GEYJ471 ERJ3GEYJ473 231309070600 Refer to 23.4. NOTICE (1) ERJ3GEYJ184 180k Refer to 23.4. NOTICE (1) ERJ3GEYJ223 ERJ3GEYJ104 100k...
  • Page 44 Ref. No. Part No. Part Name & Description Remarks ECUV1H221JCV 220P ECUV1C104ZFV ECUV1C104ZFV ECUV1C224ZFV 0.22 ECUV1H103KBV 0.01 220101681300 220101681309 0.01 220101681309 0.01 ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1H471JCV 470P ECUV1H103KBV 0.01 ECUV1C474ZFV 0.47 PQCUV1H104ZF 223271150000 0.027 ECUV1H103KBV 0.01 ECUV1H222KBV 0.0022 ECUV1C104ZFV PQCUV1C225ZF ECUV1H103KBV...
  • Page 45 270k 236302025200 ERJ3GEYJ563 ERJ3GEYJ333 ERJ3GEYJ683 ERJ3GEYJ683 68k (for KX-TC1461LAB) (Until 102059 units of Serial Number) Refer to 23.4. NOTICE (2) ERJ3GEYJ224 220k (for KX-TC1461LAB) (From 102060 units of Serial Number) Refer to 23.4. NOTICE (2) ERJ3GEYJ683 68k (for KX-TC1461LAW) (Until 15163 units of Serial Number) Refer to 23.4.
  • Page 46 Ref. No. Part No. Part Name & Description Remarks R509 ERJ3GEYJ102 R510 ERJ3GEYJ680 R511 ERJ3GEYJ101 R512 ERJ3GEYJ221 R513 ERJ3GEYJ101 R514 ERJ3GEYJ391 R517 ERJ3GEYJ100 R518 ERJ3GEYJ153 R520 ERJ3GEYJ103 R522 ERJ3GEYJ103 R524 ERJ3GEYJ221 R531 ERJ3GEYJ103 R533 ERJ3GEYJ393 R534 ERJ3GEYJ821 R536 ERJ3GEYJ153 R537 ERJ3GEYJ221 R541 ERJ3GEYJ102...
  • Page 47 Ref. No. Part No. Part Name & Description Remarks ECUV1H101JCV 100P ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1H151JCV 150P ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV PCUV1C105ZF ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1H681JCV 680P ECUV1H682KBV 0.0068 ECUV1H102KBV 0.001 ECUV1H010CCV ECUV1C104ZFV 240120942834 ECUV1H121JCV 120P ECUV1H121JCV 120P C500 ECUV1H330JCV C502 ECUV1H102KBV 0.001 C503 ECUV1H680JCV...
  • Page 48 Ref. No. Part No. Part Name & Description Remarks C568 ECUV1H102KBV 0.001 C569 ECUV1H100DCV C570 PQCUV1E104MD C571 ECUV1H680JCV C572 ECUV1H470JCV C573 ECUV1H010CCV C574 ECUV1H060DCV C575 ECUV1H050CCV C578 ECUV1H050CCV C583 ECUV1H330JCV C586 ECUV1H070CCV C590 ECUV1H010CCV C591 ECUV1H123KBV 0.012 C592 PQCUV1E104MD C593 ECUV1H680JCV C595 ECUV1H100DCV...
  • Page 49 Remarks PCB100 PQWP11461LAR MAIN P.C.BOARD ASS'Y (RTL) (IC) 273010114312 IC (for KX-TC1461LAB) (Until 102059 units of Serial Number) Refer to 23.4. NOTICE (2) 273023714012 IC (for KX-TC1461LAB) (From 102060 units of Serial Number) Refer to 23.4. NOTICE (2) 273010114312 IC (for KX-TC1461LAW) (Until 15163 units of Serial Number) Refer to 23.4.
  • Page 50 Ref. No. Part No. Part Name & Description Remarks 214418000000 DIODE(SI) 214418000000 DIODE(SI) 214418021000 DIODE(SI) 214418000000 DIODE(SI) 214418000000 DIODE(SI) 214418000000 DIODE(SI) 214418021000 DIODE(SI) 214418021000 DIODE(SI) 214418021000 DIODE(SI) 214418021000 DIODE(SI) 212560600000 DIODE(SI) (LED) 335050300005 (COILS) PQLQZK680K COIL PQLQZK680K COIL (RESISTORS) PQ4R10XJ330 ERJ3GEY0R00 ERJ3GEY0R00 ERJ3GEYJ154...
  • Page 51 2.2k (for KX-TC1461LAB) (Until 102059 units of Serial Number) Refer to 23.4. NOTICE (2) NOT USED (for KX-TC1461LAB) (From 102060 units of Serial Number) Refer to 23.4. NOTICE (2) ERJ3GEYJ222 2.2k (for KX-TC1461LAW) (Until 15163 units of Serial Number) Refer to 23.4.
  • Page 52 1.5k ERJ3GEYJ474 470k ERJ3GEYJ274 270k ERJ3GEYJ153 15k (for KX-TC1461LAB) (Until 102059 units of Serial Number) Refer to 23.4. NOTICE (2) ERJ3GEYJ682 6.8k (for KX-TC1461LAB) (From 102060 units of Serial Number) Refer to 23.4. NOTICE (2) ERJ3GEYJ153 15k (for KX-TC1461LAW) (Until 15163 units of Serial Number) Refer to 23.4.
  • Page 53 R520 ERJ3GEYJ103...
  • Page 54 Ref. No. Part No. Part Name & Description Remarks R522 ERJ3GEYJ103 R524 ERJ3GEYJ221 R531 ERJ3GEYJ103 R533 236302025200 R534 ERJ3GEYJ821 R536 ERJ3GEYJ153 R537 ERJ3GEYJ221 R541 ERJ3GEYJ102 R543 ERJ3GEYJ331 R544 ERJ3GEYJ331 R551 236202025200 R561 ERJ3GEYJ101 R562 ERJ3GEYJ124 120k R569 ERJ3GEYJ103 R571 ERJ3GEYJ102 R577 ERJ3GEYJ101 R578...
  • Page 55 Ref. No. Part No. Part Name & Description Remarks ECUV1H101JCV 100P ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1H151JCV 150P ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV PQCUV1C105ZF ECUV1C104ZFV ECUV1C104ZFV ECUV1C104ZFV ECUV1H681JCV 680P ECUV1H682KBV 0.0068 ECUV1H122KBV 0.0012 ECUV1H010CCV ECUV1H121JCV 120P C500 ECUV1H330JCV C502 ECUV1H102KBV 0.001 C503 ECUV1H680JCV C504 ECUV1H103KBV 0.01 C519...

  • Page 56: For Schematic Diagram

    491320123010 POLY BAG (for Base Unit) 491300010210 POLY BAG (for Handset) PQPK13717Z CARTON BOX (for KX-TC1461LAB) PQPK13718Z CARTON BOX (for KX-TC1461LAW) 23.4. NOTICE (1) When you change CPU of Handset * from **, also change R13, R11 and R16 synchronizing with CPU.

  • Page 57: Schematic Diagram (Base Unit)

    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 components, use only the manufacturer´s specified parts.
  • Page 58 28.3. RF Module M / KXTC1461LAB-AK / KXTC1461LAW-AK...
  • 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 FM Deviation Meter (H), (I) Spectrum Analyzer Frequency Counter TP510 TP809 (TXVCO) D.M. TP808 (RXVCO) D.M. SIG_OUT MIC_IN Audio Analyzer Oscillo scope AF Generator...
  • Page 63 CH_DET (U1-25) Rec_O/P_B KX-TC1461LAB/W: HANDSET Main (Flow Solder Side View)
  • Page 64 TP510 TP809 (TXVCO) TP808 (RXVCO) Ext_out Pre_out Tx data DET_out SIG_out KX-TC1461LAB/W: HANDSET RF Module...
  • Page 65 SP_OUT KX-TC1461LAB/W: HANDSET Main (Component View)
  • Page 66 SIG_OUT MIC_IN Oscilloscope AF Generator KX-TC1461LAB/W: HANDSET Main (Flow Solder Side View)
  • Page 67 AF OSC LOOP Ring SIMULATOR Audio Analyzer (E) (F)
  • Page 68 FM Deviation Meter (G), (I) 925.9MHz Frequency Counter Spectrum Analyzer TP510 TP809 (TXVCO) D.M. TP808 (RXVCO) D.M. SIG_OUT Oscillo scope...
  • Page 69 Lnseize REF_CLK RELAY CTRL Doubler/Buffer TX_VCO IC2-A, IC2-B Q510 Q509, VD502 4MHz RING_DET TX AUDIO RING DETECTION RX_DATA (CPU) Q6, Q7 TX_DATA RESET CIRCUIT RESET Tx_PWR CHG_DET VOLTAGE REGULATOR DC 9V Q2, Q10 CHARGE DETECT KX-TC1461LAB/W: BLOCK DIAGRAM (BASE UNIT)
  • Page 70 Tx_PWR RX_DATA LOUD AUTO RX ON/OFF Rx VCC Rx_PWR Q4, Q1 R1 - 3 Power-down Power-down C1 - 4 3.6V BATTERY RESET 4MHz RESET & CHARGE CIRCUIT CHG_DET E_MUTE Buzz RINGER ON/OFF Q3, Q6 BUZZER CKT. KX-TC1461LAB/W: BLOCK DIAGRAM (HANDSET)
  • Page 71 IC2-C Input f=1kHz 686mVp-p IC2-D (-10dBm/600Ω) (-22dBm) Reception 172mVp-p 4.5Vp-p 900mVp-p Ring -40dBm 22mVp-p Output IC2-A IC2-B -11dBm IC2-E 4.5V GREEN IN USE/CHARGE To AC Adaptor To H/S KX-TC1461LAB/W: SCHEMATIC DIAGRAM (Base Unit) Main...
  • Page 72 10.7 MHz 10.7 MHz 25KHz-Dev 1KHz Tone 1.75V 0.2V Input (at CH1) Rx VCO 25KHz-Dev Tx VCO 1KHz Tone 1.8V 0.15V Output (at CH1) Tx VCO KX-TC1461LAB/W: SCHEMATIC DIAGRAM (Base Unit) RF Module...
  • Page 73 3.6V 3.3V 3Vp-p 300mVp-p 3.3V 490mVp-p (Volume) 3.3V Input 1kHz -19.6mVp-p 3.0V KX-TC1461LAB/W: SCHEMATIC DIAGRAM (Handset) Main...
  • Page 74 10.7 MHz 10.7 MHz 25KHz-Dev 1KHz Tone 1.75V 0.2V Input (at CH1) Rx VCO 25KHz-Dev 1KHz Tone Tx VCO Output 1.8V 0.15V (at CH1) Tx VCO KX-TC1461LAB/W: SCHEMATIC DIAGRAM (Handset) RF Module...
  • Page 75 L seize Power Down Tx Down SIG_OUT KX-TC1461LAB/W: BASE UNIT Main (Component View)
  • Page 76 LED P1 (IC3-12) CHG_DET (IC3-25) Ring_DET (IC3-26) KX-TC1461LAB/W: BASE UNIT Main (Flow Solder Side View)
  • Page 77 TP510 TP809 (TXVCO) TP808 (RXVCO) D_OUT D_IN Tx Data REC_O/P_A KX-TC1461LAB/W: BASE UNIT RF Module...

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