Kenwood TH-K4AT Service Manual
Also see for TH-K4AT: Instruction manualInstruction manualService manual
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Contents
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TH-K4AT/K4E42Adjustment pointsTX-RX unit (A/3)Component side viewJ2DC INJ3MIC J4SPVR1VR5VR6LVBLCDANTBTEMPGNDSETTX-RX UNIT (A/3)Component side view10. VOXOperationCheck11. DTMFDEVCheck12. 1750HzTone DEVCheck(E type only)13. ProtectionCheck(DC INterminal: 13.8V)To exit from the AdjustmentMode, turn the transceiverpower OFF and then ON.1)Frequency: 435.000MHzVOX Gain: 4AG: OFF2)AG: 1kHz/100mVDetector: P-P/2HPF: OFFLPF: 15kHzDe-emphasis: OFFTX power: Low1)Frequency: 435.000MHzSend DTMF code “D”Detector: P-P/2HPF: OFFLPF: 15kHzDe-emphasis: OFFTX power: Low1)Frequency: 435.000MHzSend 1750Hz ToneTX power: High1)Frequency: 435.000MHzANT: OPENPTT: ONAGLinear detectorAm meterCheckCheckCheckCheckDoes nottransmit.Transmits.2.0kHz - 4.2kHz2.5kHz - 4.5kHz2.4A or lessItem Condition Measurement Adjustment Specifications/Test equipment Unit Terminal Unit Parts Method RemarksMICANTTX-RX(A/3)ADJUSTMENTNote: For details of sending DTMF code “D”,refer to the “Single Tone Mode” on page 27.VR1 : TX frequencyVR5 : MAX DEVVR6 : DCS modulation valanceLV : VCO lock voltage terminal |
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