Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S195ADJUSTMENTTransmitter SectionItem ConditionMeasurement AdjustmentSpecifications/RemarksTest-equipment Unit Terminal Unit Parts Method• Perform the following in the adjustment mode. Item 1 and 7~35 have been adjusted;To terminate the adjustment menu in the middle, save your settings with Menu No. 128.1. ALC refer-ence voltage1) Menu No. : 67 (14.1MHz,USB) TransmitDVM TX-RX(A/2)TP1(ALC)Frontpanel[UP]/[+](F5) or[DOWN]/[-](F4)Set the adjustmentvalue wiithin the limitof the specifi ed volt-age.2.5V±0.1V2. TX IF Gain 1) Main display f.:18.100000MHzMode: CWDRV: ONTransmitConnect the spectrum analyz-er input to J700.After the adjustment, discon-nect the cable from J700.50dummyOscillo-scopeSpectrumanalyzerJ700(DRV)TX-RX(A/2)L720L721Output level max. –4dBm or more3. TX IF GainCheck1) Main display f.:18.100000MHzMode: CWDRV: OFFTransmitDisconnect the cable fromCN800 and connect the spec-trum analyzer input to CN800.After the adjustment, discon-nect the cable from CN800.CN800 Check the outputlevel.–4dBm or more4. TX HF BPF(49~54M)Check1) Main display f.:50.000000MHzMode: CWTransmitCheck the driveoutput level.5. Final idlingcurrent1) Main display f.:51.990000MHzMode: USBFinal unit (A/2) VR1~4: MINTransmitAmmeter Final(A/2)DC-DC(A/3)CN36CN16Final(A/2)Check the defaultcurrent (I 0 ).Disconnect the lead wire withconnector (E37-1612-05) thatis connected between theCN36 and CN16, and attachjig cable (W05-1776-00).When you adjust VR1, con-nect each pin 1 of jig cable toan ammeter. When you adjustVR2, connect each pin 3 of jigcable to an ammeter. (Referto page 162.)After the adjustment, discon-nect jig cable and reconnectthe lead wire with connector(E37-1612-05) to its originalposition.VR1 IO + 650mA ±50mAVR2 1500mA ±100mA