Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S236Pin No. Name I/O Function8 GND - GND9 PKS I PTT line control for data communication10 SSMET O Sub RX S-meter voltage11 ANI I Packet data input12 GND - GND13 SS I Standby switchJ3 (REMOTE)1 SPO O Speaker output2 COM - Relay (K101) common terminal3 SS I Standby switch4 MKE - Relay (K101) make terminal5 BRK - Relay (K101) break terminal6 ALC I ALC voltage7 RL O Linear amplifi er control signalJ4 (KEY)1 GND - GND2 KEY1 I KEY down signal/ Electric keyer dot sig-nal3 KEY2 I KEY down signal/ Electric keyer dashsignal4 NC - No connectionTERMINAL FUNCTIONPin No. Name I/O Function5 KYSR I KEY jack/ PADDLE judgement signal6 GND - GND7 NC - No connection8 NC - No connection9 NC - No connectionJ700 (DRV)1 DRV O Drive output (Coaxial)TX-RX (NB) unit (X57-827X-XX B/2)Pin No. Name I/O FunctionCN920 (to TX-RX unit A/2 CN910)1 SIBK I Sub RX IF blanking signal2 1STIF I 1st IF signal switch3 SNBL I Sub RX noise blanker level4 SBLNK O Sub RX IF mute signal5 8A I Audio 8V6 GND - GNDCN950 (to TX-RX unit A/2 CN900)1 SNBIF I Sub RX noise blanker IF input (Coaxial)