Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S220TERMINAL FUNCTIONPin No. Name I/O Function9 MDEN1 I Main DDS enable (IC3)10 MLRST I Main DDS reset (IC3)11 MLSEN I Main local shift register enable (IC15)12 MPEN1 I Main PLL enable (IC2)13 RDEN I Reference DDS enable (IC13)14 ERDET O External ref. detect15 REFO I Reference output select16 MLCK I Main local serial clock17 MLDT I Main local serial data18 RPEN I Reference PLL enable (IC18)19 UL O Main PLL unlock20 REFI I External reference input select21 MDEN2 I Main DDS enable (IC26)22 GND - GNDCN19 (to PLL (SUB) unit CN42)1 R40M O Reference 40MHz (Coaxial)CN20 (to Accessory (SCOPE) unit A/10 CN6)1 SCREF O Reference 40MHz (Coaxial)CN21 (to RX unit A/2 CN104)1 MLO2 O Main LO2 (Coaxial)CN22 (to RX unit A/2 CN89)1 MLO1 O Main LO1 (Coaxial)CN33 (to DC-DC unit A/3 CN222)1 R10M I/O REF I/OCN34 (to DC-DC unit A/3 CN80)1 14SL I 14V2 GND - GND3 8V I 8V4 GND - GNDPLL (SUB) unit (X50-3230-00)Pin No. Name I/O FunctionCN1 (to Control unit CN47)1 NC - No connection2 X50V2 O PCB version3 GND - GND4 SLDT I Sub local serial data5 SLCK I Sub local serial clock6 UL O Sub PLL unlock7 MLRST I Sub DDS reset (IC14)8 SDEN1 I Sub DDS enable (IC14)9 SDIO I Sub DDS I/O_update (IC14)10 SDEN2 I Sub DDS enable (IC12)11 SDEN3 I Sub DDS enable (IC11)12 SPEN1 I Sub PLL enable (IC10)Pin No. Name I/O Function13 SPEN2 I Sub PLL enable (IC16)14 SPEN3 I Sub PLL enable (IC1)15 SLSEN I Sub local shift register enable (IC5)16 GND - GNDCN35 (to DC-DC unit A/3 CN80)1 14V I 14SL2 GND - GND3 8V I 8V4 GND - GNDCN42 (to PLL (MAIN) unit CN19)1 R40M I Reference 40MHz (Coaxial)CN59 (to TX-RX A/2 unit CN850)1 TLO1 O Sub TX LO1 (Coaxial)CN63 (to TX-RX A/2 unit CN300)1 SLO1 O Sub RX LO1 (Coaxial)CN64 (to TX-RX A/2 unit CN500)1 SLO3 O Sub LO3 (Coaxial)CN65 (to TX-RX A/2 unit CN400)1 SLO2 O Sub LO2 (Coaxial)CN66 (to DSP unit CN666)1 FMOD I FM modulation (AF)2 GND - Analog GNDAT (ANT SW) unit (X53-4410-00 A/2)Pin No. Name I/O FunctionCN17 (to RX unit A/2 CN1)1 MRAT O Main RX RF signal input (Coaxial)CN18 (to TX-RX unit A/2 CN200)1 SRAT O Sub RX RF signal input (Coaxial)CN24 (to Final (ANT CN) unit B/3 CN816)1 GND - GND2 GND - GND3 NC - No connection4 33S I 3.3V (DC/DC)5 33S I 3.3V (DC/DC)6 NC - No connection7 14S I Switched 14V8 14S I Switched 14V9 NC - No connection10 CLK I Serial clock11 DATA I Serial data12 AFEN O Enable signal (IC8, X45-388 B/2 IC800)13 QS I Serial data for IC8