Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S235Pin No. Name I/O Function27 NC - No connection28 ID O Drain current signal29 VSFM O VSF meter voltage30 VSRM O VSR meter voltage31 X57V O Version detection signal32 33S O Switched 3.3V33 NC - No connection34 GND - GND35 NC - No connection36 5A O Audio 5VCN2 (to DSP unit CN671)1 GND - GND2 SP1 I Speaker output (to REMOTE)3 GND - GND4 SAGCV I Sub RX AGC control voltage5 RTK O RTTY key signal6 GND - GND7 ANI O Packet data input (from ACC2)8 GND - GND9 GND - GND10 SANO I Sub RX AF signal output (to ACC2)11 GND - GND12 MANO I Main RX AF signal output (to ACC2)13 GND - GNDCN3 (to DC-DC unit B/3 CN530)1 NC - No connection2 NC - No connection3 33GND - GND (3.3V)4 NC - No connection5 TXB O TX 8V6 NC - No connection7 33GND - GND (3.3V)8 VSF I Forward wave power detection voltage9 VSR I Refl ected wave power detection voltage10 ID I Drain current signal11 NC - No connection12 33S I Switched 3.3V13 NC - No connection14 5GND - GND (5V)15 NC - No connection16 5A I Audio 5VCN4 (to DC-DC unit A/3 CN174)1 14S I Switched 14V2 GND - GND3 8A I Audio 8VPin No. Name I/O FunctionCN200 (to AT (ANT SW) unit A/2 CN18)1 SRAT I Sub RX RF signal input (Coaxial)CN300 (to PLL (SUB) unit CN63)1 SLO1 I Sub RX 1st local signal input (Coaxial)CN350 (to Accessary (SCOPE) unit A/10 CN3)1 SC11S O Sub RX 11M IF signal output (Coaxial)CN400 (to PLL (SUB) unit CN65)1 SLO2 I Sub RX 2nd local signal input (Coaxial)CN450 (to Accessary (SCOPE) unit A/10 CN4)1 SC73S O Sub RX/TX 73M IF signal output (Coaxial)CN500 (to PLL (SUB) unit CN64)1 SLO3 I Sub RX 3rd local signal input (coaxial)CN600 (to DSP unit CN670)1 SRIF O Sub RX IF signal output2 GND - GNDCN700 (to DSP unit CN663)1 TIF I TX IF signal input2 GND - GNDCN800 (to Final unit A/2 CN2)1 DRIVE O TX RF signal output (Coaxial)CN850 (to PLL (SUB) unit CN59)1 TLO1 I TX 1st local signal input (Coaxial)CN900 (to TX-RX (NB) unit B/2 CN950)1 SNBIF O Sub RX noise blanker IF output (Coaxial)CN910 (to TX-RX (NB) unit B/2 CN920)1 SIBK O Sub RX IF blanking signal2 1STIF O 1st IF signal switch3 SNBL O Sub RX noise blanker level4 SBLNK I Sub RX IF mute signal5 8A O Audio 8V6 GND - GNDJ1 (METER)1 GND - GND2 MSMET O Main RX S-meter voltage3 SSMET O Sub RX S-meter voltage10 NC - No connection11 NC - No connectionJ2 (ACC2)1 SANO O Sub RX AF signal output2 RTTY I RTTY key input3 MANO O Main RX AF signal output4 GND - GND5 MSQ O Main squelch control signal6 MSMET O Main RX S-meter voltage7 SSQ O Sub squelch control signalTERMINAL FUNCTION