Panasonic KX-TC2000NZW, KX-TC2000NZB, KX-TC2000NZF manual Circuit Operation, Outline

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KX-TC2000NZB / KX-TC2000N ZW / KX-TC2000NZF

19 CIRCUIT OPERATION

19.1. 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.34).

∙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.34).

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Contents KX-TC2000NZB KX-TC2000NZW KX-TC2000NZF Contents Cabinet and Electrical Parts Location Handet About Lead Free Solder PbF Pb free Suggested PbF SolderHow to recognize that Pb Free solder is used Base Unit Main PCBFor Service Technicians Battery Recharge Battery informationBattery Replacement Location of Controls Base Unit HandsetConnection For Service Hint Operations Making Calls Answering CallsKX-TC2000NZB / KX-TC2000N ZW / KX-TC2000NZF KX-TC2000NZB / KX-TC2000N ZW / KX-TC2000NZF Recall Button Disassembly Instructions Show in Fig Procedure To remove RemoveRear Cabinet Battery compartment cover Troubleshooting Guide Check Power Bell Reception Check Battery Charge Check Link CPU IC2 RF IC IC1Refer to Adjustment P.29 Check Handset Transmission Check Handset ReceptionAdjustments Base Unit Test Mode Flow Chart Base UnitHow to change the channel AdjustmentAdjustment Standard Base Unit IC1Adjustments Handset Test Mode Flow Chart HandsetHow to change the channel Adjustment IC1Adjustment Standard Handset Component ViewFlow Solder Side View HOW to Check the Handset Speaker RF SpecificationBase Unit Frequency Table MHz Explanation of CPU Data Communication STAND-BY TALK, Talk STAND-BYRinging Changing the Channel Ports for transmitting and receiving of data Block Diagram Base Unit RF IC IC1Block Diagram Handset IC2Circuit Operation OutlinePower Supply Circuit Reset Circuit Base Unit Telephone Line Interface Charge CircuitDtmf Transmitter/Receiver Base to HandsetHandset to Base Signal Route Reset Circuit Handset Circuit Operation HandsetBattery Low / Power Down Detector 21.1. IC2 22.1. IC2 23.1. IC1 HOW to Replace Flat Package IC ProcedureModification Procedure of Bridge PreparationCabinet and Electrical Parts Location Base Unit Cabinet and Electrical Parts Location Handet Accessories and Packing Materials Replacement Parts List Cabinet and Electrical PartsDiodesi LED LED1 ERDS2TJ223 PQXA36ASVC Battery Accessories and Packing Materials Base Unit Schematic Diagram Base Unit For Schematic DiagramHandset Schematic Diagram Handset Schematic Diagram Base Unit 30.1 Base UnitRF Unit Base Unit FILTER\2Schematic Diagram Handset 31.2 RF Unit Handset IC1Memo Circuit Board Base Unit Component ViewFlow Solder Side View RX-VCO TX-VCOIC2 IC1 KXTC2000NZB