Kenwood NX-420 K Service Manual

Contents

NX-42040ADJUSTMENTRadio Check SectionItemCondition Measurement Adjustment Specifications /RemarksPanel test mode PC test mode Test-equipment Unit Terminal Unit Parts Method1. Frequencycheck1) CH-Sig: 1-1PTT: ON1) Test ChannelChannel: 1Test SignalingMode: AnalogSignaling: 1PTT: Press[Transmit] button.f. counter Panel ANT Check an internaltemperature ofradio from 20˚C to26˚C.806.04980~806.05020MHz(±0.25ppm@806.05MHz)2. High powercheck(Batt: 7.5V)1) CH-Sig: 2-1PTT: ON1) Test ChannelChannel: 2Test SignalingMode: AnalogSignaling: 1PTT: Press[Transmit] button.Power meterAmmeterCheck 2.7W~3.3W2.0A or less2) CH-Sig: 2-1(TA)PTT: ON2) Test ChannelChannel: 2Test SignalingMode: AnalogSignaling: 1Talk Around : ONPTT: Press[Transmit] button.3. Low powercheck(Batt: 7.5V)1) CH-Sig: 2-1PTT: ON1) Test ChannelChannel: 2Test SignalingMode: AnalogSignaling: 1PTT: Press[Transmit] button.0.7W~1.3W1.1A or less2) CH-Sig: 2-1(TA)PTT: ON2) Test ChannelChannel: 2Test SignalingMode: AnalogSignaling: 1Talk Around : ONPTT: Press[Transmit] button.4. MICsensitivitycheck1) CH-Sig: 1-1AG: 1kHzPTT: ON1) Test ChannelChannel: 1Test SignalingMode: AnalogSignaling: 1AG: 1kHzPTT: Press[Transmit] button.DeviationmeterOscilloscopeAGAF VMPanel ANTSP/MICconnectorAdjust AG inputto get a standardMOD.12.5mV±5.8mV