Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S196ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications/RemarksTest-equipment Unit Terminal Unit Parts MethodFinal idlingcurrent2) Main display f.:51.990000MHzMode: USBFinal unit (A/2) VR1~4: MINTransmitDisconnect the lead wire withconnector (E37-1611-05) thatis connected between theCN32 and the AC/DC powersupply 4-pin connectors, andattach jig cable (W05-1772-00).Connect the jig cable to anammeter. (Refer to page 161.)After the adjustment, discon-nect jig cable and reconnectthe lead wire with connector(E37-1611-05) to its originalposition.Ammeter Final(A/2)AC/DCpowersupplyCN324-pinconnec-torFinal(A/2)Check the defaultcurrent (I 1).I1 = 16mA (approxi-mately)Note:• Continuously adjust VR3and VR4. Do not return tothe reception condition afteradjusting VR3.VR3 I1 + 250mA = I2 ±50mA• Prior to connecting a jig cableto an ammeter, turn the mainpower OFF with the mainpower switch (I/O) on the rearpanel.VR4 I2 + 250mA = I3 ±50mA6. FAN Check 1) Main display f.:14.100000MHzMode: CWAT: ONShort TP5 and GND.Final(A/2)TP5 Check Two Final FAN rotate strongly.The AT FAN operates duringAT ON.There are no abnormalnoises.2) Main display f.:14.100000MHzMode: CWAT: ONShort TP6 and GND.TP67. Vd meter 1) Menu No.: 110 (14.1MHz,USB)TransmitPowermeter500W ATTRearpanelANT1 Frontpanel[UP]/[UP-DATE](F5)1 push8. ID currentsetting1) Menu No.: 104 (29.1MHz,CW)TransmitNote: Record the currentadjustment value.Frontpanel[UP]/[+](F5)or[DOWN]/[-](F4)Set the adjustmentvalue to 35.This adjustment is performedfor “9. Power Check”.