Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S221TERMINAL FUNCTIONPin No. Name I/O FunctionCN37 (to Final (ANT CN) unit B/2 CN815)1 E_ANT I Sub RX RF signal input (Coaxial)CN47 (to DC-DC (LINK) unit B/3 CN500)1 AFEN I Enable signal (IC8, X45-388 B/2 IC800)2 VSR O Refl ected wave power detection voltage3 CLK I Serial clock4 VSF O Forward wave power detection voltage5 DATA I Serial data6 PHD O Output voltage of phase detector7 NC - No connection8 AMD O Output voltage of amplitude detector9 GND - GND10 TXB I TX 8V11 5A I Switched 5V12 5A I Switched 5V13 NC - No connection14 14S I Switched 14V15 14S I Switched 14V16 NC - No connection17 14GND - GND for 14S18 14GND - GND for 14S19 NC - No connection20 33S I 3.3V (DC/DC)21 33S I 3.3V (DC/DC)22 33S I 3.3V (DC/DC)23 -12V - RX -12V24 33GND - GND for 33S25 33GND - GND for 33S26 33GND - GND for 33SJ1 (RX IN)1 RX IN I RX inputJ2 (RX OUT)1 RX OUT O RX outputJ4 (to Final (ANT CN) unit B/2 J800)1 HFPO2 O TX RF signal output (Coaxial)J5 (to AT unit B/2 W202)1 AT OUT O Output power from antenna tuner (Co-axial)J6 (to AT unit B/2 W201)1 AT IN O Input power from antenna tuner (Coaxial)J7 (to Final unit A/2 J1)1 HFPO1 O TX RF signal output (Coaxial)AT unit (X53-4410-00 B/2)Pin No. Name I/O FunctionCN360 (to DC-DC (LINK) unit B/3 CN440)1 GND - GND2 QSL I Serial data for IC3403 ATPWS I AT relays ON/OFF switch H: ON, L: OFF4 MFEN1 I Enable signal (IC340)5 MFEN2 I Enable sigcnal (IC300, IC320)6 CLK I Serial clock7 DATA I Serial data8 NC - No connection9 5M I K281 ON/OFF H: ON, L: OFF10 NC - No connection11 33S I 3.3V (DC/DC)12 NC - No connection13 14S I Switched 14V14 14S I Switched 14V15 NC - No connection16 GND - GND17 GND - GND18 NC - No connection19 FAN+ I Supply FAN voltage20 FAN+ I Supply FAN voltage21 FFANAT O AT FAN rotation pulse output22 FAN- - FAN GND23 FAN- - FAN GND24 NC - No connectionCN381 (to FAN)1 FFANAT O Pulse signal when AT FAN operates2 FAN+ I Supply FAN voltage3 FAN- - FAN GNDW201 (to AT (ANT SW) unit A/2 J6)1 AT IN O Input power from antenna tuner (Coaxial)W202 (to AT (ANT SW) unit A/2 J5)1 AT OUT O Output power from antenna tuner (Co-axial)Control unit (X53-452X-XX)Pin No. Name I/O FunctionCN1 (to DC-DC unit A/3 CN180, DSP unit CN2)1 14SD I 14V for digital circuit2 GND - GND3 14SD 0 14V for DSP Unit4 GND - GNDCN2 (to DC-DC unit A/3 CN180)1 33SD I 3.3V (DC/DC)