Panasonic KX-TC2000NZF, KX-TC2000NZB, KX-TC2000NZW manual How to change the channel Adjustment, IC1

Page 29

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

12.2. How to change the channel

12.3. Adjustment

	Adjustment Items	Test Mode	Adjustment	Procedure	Check or
			Point		Replace
					Parts
(A)	Battery Low	3ch Talk	-	1. Adjust the power supply voltage to DC3.60V,and confirm so that the	IC1
	Confirmation			reading of oscillosope is High.
				2. Adjust that power supply voltage to DC 3.40V, and confirm so that the
				reading of oscilloscope is Low.
(B)	TX VCO	3ch Talk	T6	1. Adjust T6 so that the reading of the Digital Voltmeter is 1.5V ± 0.3V.	IC1, X1,
	Adjustment				T6, DV1
(C)	RX VCO	3ch Talk	-	1. Confirm so that the reading of the Digital Voltmeter is 0.7 ~ 3.0V.	IC1, X1,
	Confirmation				L6, C24
(D)	TX Frequency	3ch Talk	VC1	∙ Adjust VC1 so that the reading of the frequency counter is 39.8750MHz	IC1,
	Adjustment			± 100Hz.	DPX1, T5
(E)	TX Power	3ch Talk	-	∙ Confirm so that the reading of the RF VTVM is more than -3.0dBm	IC1,Q3,Q4,
	Confirmation			(50Ω load).	Q5, DPX1
(F)	RX Sensitivity	3ch Talk	T3	1. Apply 60dBuVemf output from S.S.G. (modulation frequency 1KHz, dev.	DPX1,
	Confirmation			0KHz).	T3,IC1,
	(2nd IF output)			2. Confirm that the reading of RF VTVM is the maximum value (more than	CF1, CF2

				15mV).
(G)	Noise Squelch	3ch Talk	-	1. Measure the SSG output level when the noise squelch changes from	IC1, DPX1
	Confirmation			Low to High. (modulation frequency 1KHz, dev.3kHz)
				2. Confirm that the SSG output level is -18 ~ 0dBuVemf.
(H)	Speaker	3ch Talk	-	1. Apply 60dBuVemf output from S.S.G. (modulation frequency 1KHz, dev.	IC1
	Output Level			3KHz).
	Confirmation			2. Confirm that the reading of AF VTVM is more than 30mV.
				2. Confirm that the reading of AF VTVM is more than 30mV.
				(distortion: less than 5%) (volume High).
(I)	Mic Modulation	3ch Talk	-	1. Apply a MIC signal (1KHz, 5.0mV at 600Ω load).	IC1, DV1
	Factor			2. Confirmation so that the reading of FM Deviation Meter is 3.4KHz ±
	Confirmation
	Confirmation			0.4KHz.
				0.4KHz.
(J)	Data	3ch Talk	-	∙ Confirm for 5.0 ± 1.0KHz FM Deviation Meter reading.
	Modulation
	Confirmation
(K)	Battery low	-	-	1. Apply 3.50V between BATT(+) and BATT(-).	IC1
	Confirmation			2. Confirm that there is no flashing of RECHARGE LED.
				2. Confirm that there is no flashing of RECHARGE LED.
				3. Apply 3.40V between BATT(+) and BATT(-).
				4. Confirm that there is flashing of RECHARGE LED.

The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.30).

SSG Frequency: 30.175 MHz

29

Image 29

Contents KX-TC2000NZB KX-TC2000NZW KX-TC2000NZF Contents Cabinet and Electrical Parts Location Handet Suggested PbF Solder About Lead Free Solder PbF Pb freeBase Unit Main PCB How to recognize that Pb Free solder is usedFor Service Technicians Recharge Battery information BatteryBattery Replacement Base Unit Handset Location of ControlsConnection For Service Hint Making Calls Answering Calls OperationsKX-TC2000NZB / KX-TC2000N ZW / KX-TC2000NZF KX-TC2000NZB / KX-TC2000N ZW / KX-TC2000NZF Recall Button Show in Fig Procedure To remove Remove Disassembly InstructionsRear Cabinet Battery compartment cover Troubleshooting Guide Check Power Bell Reception Check Battery Charge CPU IC2 RF IC IC1 Check LinkRefer to Adjustment P.29 Check Handset Reception Check Handset TransmissionTest Mode Flow Chart Base Unit Adjustments Base Unit Adjustment How to change the channelIC1 Adjustment Standard Base UnitTest Mode Flow Chart Handset Adjustments HandsetIC1 How to change the channel AdjustmentComponent View Adjustment Standard HandsetFlow Solder Side View Base Unit RF SpecificationHOW to Check the Handset Speaker Frequency Table MHz STAND-BY TALK, Talk STAND-BY Explanation of CPU Data CommunicationRinging Changing the Channel Ports for transmitting and receiving of data RF IC IC1 Block Diagram Base UnitIC2 Block Diagram HandsetOutline Circuit OperationPower Supply Circuit Reset Circuit Base Unit Dtmf Charge CircuitTelephone Line Interface Base to Handset Transmitter/ReceiverHandset to Base Signal Route Circuit Operation Handset Reset Circuit HandsetBattery Low / Power Down Detector 21.1. IC2 22.1. IC2 23.1. IC1 Procedure HOW to Replace Flat Package ICModification Procedure of Bridge PreparationCabinet and Electrical Parts Location Base Unit Cabinet and Electrical Parts Location Handet Accessories and Packing Materials Cabinet and Electrical Parts Replacement Parts ListDiodesi LED LED1 ERDS2TJ223 PQXA36ASVC Battery Accessories and Packing Materials Handset Schematic Diagram Handset For Schematic DiagramBase Unit Schematic Diagram Base Unit 30.1 Base Unit Schematic Diagram Base UnitFILTER\2 RF Unit Base UnitSchematic Diagram Handset IC1 31.2 RF Unit HandsetMemo Component View Circuit Board Base UnitRX-VCO TX-VCO Flow Solder Side ViewIC2 IC1 KXTC2000NZB