Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S179ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications/RemarksTest-equipment Unit Terminal Unit Parts MethodSUB RXTrap fre-quency• 15.501MHz/11.700MHz(E type only)2) Sub display f.: 13.890MHzMode: USBP.AMP: ONSpectrum analyzer settingStart Frequency: 5MHzStop Frequency: 20MHzTG level: 0dBmTrackinggeneratorSpectrumanalyzerTX-RX(A/2)CN200CN230TX-RX(A/2)L206L207Adjust L206 toget a null pointat 15.501MHz asshown. Then, adjustL207 to get a nullpoint at 11.700MHzas shown.Repeat the trap fre-quency adjustment2 to 3 times, al-ternating between15.5MHz and11.7MHz.11.70MHz 15.501MHz15. SUB RX HFBPF• 7M1) Sub display f.: 7.200000MHzMode: USBP.AMP: OFFSpectrum analyzer settingCenter Frequency: 7.2MHzFrequency span: 5MHzTG level: 0dBmL226L227L228Adjust each coil toobtain the frequencyresponse as shown.6.90MHz 7.50MHz• 14M 2) Sub display f.: 14.2MHzMode: USBP.AMP: OFFSpectrum analyzer settingCenter Frequency:14.2MHzFrequency span: 8MHzTG level: 0dBmL235L236L237Adjust each coil toobtain the frequencyresponse as shown. 13.90MHz 14.50MHz16. SUB RXIF trapfrequency(30M~60M)• 73.095MHz1) Sub display f.: 50.000000MHzMode: USBP.AMP: ONSpectrum analyzer settingCenter Frequency:73.095MHzFrequency span: 12MHzTG level: -20dBmL247 Adjust the coil toget a null pointat 73.095MHz asshown.73.095MHz17. SUB RXTrap frequen-cy (21M)• 44.150MHz1) Sub display f.: 21.400000MHzMode: USBP.AMP: ONSpectrum analyzer settingCenter Frequency:30.0MHzFrequency span: 40MHzTG level: -10dBmTC201 Adjust the trimmerto get a null pointat 44.150MHz asshown.Note: Check that the14.5 to 21.5M leveldoes not fall.44.150MHz14.50MHz 21.50MHz