Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S233TERMINAL FUNCTIONPin No. Name I/O Function20 GG6 I Green data for sub display21 GG7 I Green data for sub display22 RR0 I Red data for sub display23 RR1 I Red data for sub display24 RR2 I Red data for sub display25 RR3 I Red data for sub display26 RR4 I Red data for sub display27 RR5 I Red data for sub display28 RR6 I Red data for sub display29 RR7 I Red data for sub display30 DEN I Data enable for sub display31 HSYNC I Horizontal SYNC signal for sub display32 VSYNC I Vertical SYNC signal for sub display33 DOTCLK I Dot clock for sub display34 NC - No connection35 VCC I Power supply for sub display (3.3V)36 NC - No connection37 SDISPK O Power supply for sub display backlightcathode38 NC - No connection39 SDISPA I Power supply for sub display backlightanode40 NC - No connectionRX unit (X55-313X-XX A/2)Pin No. Name I/O FunctionCN1 (to AT unit B/2 CN17)1 MRAT I MRAT input (Coaxial)CN2 (to DC-DC unit A/3 CN174)1 8A I 8V (DC/DC)2 8A I 8V (DC/DC)3 GND - GND4 14S I 13.8V (DC/DC)CN11 (to RX (BPF) unit B/2 CN501)1 BPFI O BPF input (Coaxial)CN13 (to RX (BPF) unit B/2 CN534)1 BPFO I BPF output (Coaxial)CN22 (to RX (BPF) unit B/2 CN520)1 14S O 13.8V (DC/DC)2 NC - No connection3 GND - GND4 GND - GND5 NC - No connection6 RX14 O Switched 14V7 NC - No connectionPin No. Name I/O Function8 8A O 8V (DC/DC)9 NC - No connection10 MBPF14 O BPF14 (46.5~60MHz) ON11 MBPF13 O BPF13 (40~46.5MHz) ON12 MBPF12 O BPF12 (26.5~35MHz) ON13 MBPF11 O BPF11 (21.5~26.5MHz) ON14 MBPF10 O BPF10 (18.5~21.5MHz) ON15 MBPF9 O BPF9 (14.5~18.5MHz) ON16 MBPF8 O BPF8 (10.5~14.5MHz) ON17 MBPF7 O BPF7 (7.5~10.5MHz) ON18 MBPF6 O BPF6 (6~7.5MHz) ON19 MBPF5 O BPF5 (4.1~6MHz) ON20 MBPF4 O BPF4 (2.5~4.1MHz) ON21 MBPF3 O BPF3 (1.705~2.5MHz) ON22 NRLY O Diode SW BPF block ONCN26 (to Accessory (PRESEL) unit B/10 CN401)1 PREI O PRESEL input (Coaxial)CN28 (to Control unit CN32)1 5A I 5V (DC/DC)2 X55V1 RX unit version control3 GND - GND4 GND - GND5 X55V2 PRESEL unit version control6 33S I 3.3V (DC/DC)7 NBS I NB ON/OFF8 REN1 I Serial/Parallel IC2, IC3 enable9 REN2 I Serial/Parallel IC4, IC5 enable10 PSEN I PRESEL serial/parallel IC enable11 DAEN1 I D/A IC enable12 MRXC I RX ON/OFF13 MFSM O FM S-meter voltage14 MFSQL O FM squelch voltage15 PSEEN I EEPROM enable16 PSECK I EEPROM clock17 PSESI O EEPROM serial data input18 PSEDA I EEPROM data output19 DATA I Serial data20 CLK I Serial clock21 MIBK I IF blanking22 MAGCV I Automatic gain control voltageCN53 (to Accessory (PRESEL) unit B/10 CN446)1 PREO I PRESEL output (Coaxial)CN70 (to Accessory (PRESEL) unit B/10 CN402)1 14S O 13.8V (DC/DC)2 NC - No connection