Kenwood TK-390 Service Manual

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Contents

46TK-3901. AF level 1) Set panel test mode SSG Panel ANT Check 0.63V± 0.3Vcheck CH No. : 3 3% or lessSignalling No. : 1 AF VTVM Side UniversalSSG freq. : Each freq. Oscilloscopeoutput : –53dBm/501μV DistortionMOD. : 1kHz meterDEV. : 3kHz Audio2) Turn the toggle SW to the analyzer 0.63V± 0.3Vright (narrow) 5% or lessSSG freq. : Each freq.output : –53dBm/501μVMOD. : 1kHzDEV. : 1.5kHz2. Hum and 1) Set panel test mode 42dB or morenoise ratio CH No. : 3check Signalling No. : 1SSG output : –53dBm/501μV2) Turn the toggle SW to the 37dBmright (narrow)SSG output : –53dBm/501μV3. BPF coil 1) Set panel test mode Tracking Panel ANT TX-RX L205 Adjust the BPF coil so that the waveform is peaked.CH No. : 2 generator L210 The frequency with the peak waveform does notUse this Connect the spectrum have to be the center frequency.adjustment analyzer to TP3. Spectrum TX-RX TP3 After finished peaking the waveform, perform aprocedure Signalling No. : 1 analyzer 3 point adjustment and set for maximum sensitivity.after replace- Push Orange to 3 pointing any of adjustment modethe BPF Select SNS 25coils L22. BATT 1) Set panel test mode Power meter Panel ANT Check Cannot transmitdetection CH No. : 3 LED (TX) blinkscheck Signalling No. : 1 DC VTVM Bottom BATTBATT terminal voltage : 5.7V terminalPTT : ON2) BATT terminal voltage : 6.5V TransmitPTT : ONMeasurementTest-equipment Unit TerminalAdjustmentUnit Parts Method Specifications/RemarksConditionItemRX BPF 0-10REF –10.0dBm10dB/ATT 10dB A write B blankRBW300kHzVBW10kHzSWP70msCENTER 470.0MHz SPAN 100.0MHzTG LEVEL–30dBm HiCenterLowMKR443.6MHz–31.07dBmReceiver SectionMeasurementTest-equipment Unit TerminalAdjustmentUnit Parts Method Specifications/RemarksConditionItem