Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S212TERMINAL FUNCTIONAccessory (MULTI) unit (X42-3430-00 G/10)Pin No. Name I/O FunctionCN607 (to Display (MAIN PANEL) unit A/6 CN5)1 LMULTI O Multi encoder LED (D613)2 LEDDIM I LED power supply3 MULTIB O Multi encoder pulse B4 MULTIC - GND5 MULTIA O Multi encoder pulse AAccessory (HC/LC) unit (X42-3430-00 H/10)Pin No. Name I/O FunctionCN608 (to Display (MAIN PANEL) unit A/6 CN6)1 LCENCB O Low cut encorder pulse B2 GND - GND3 LCENCA O Low cut encorder pulse A4 HCENCB O High cut encoder pulse B5 NC - No connection6 HCENCA O High cut encoder pulse AAccessory (NR/NB) unit (X42-3430-00 I/10)Pin No. Name I/O FunctionCN609 (to Display (MAIN PANEL) UNIT A/6 CN260)1 VNR1 O Noise reduction 1 volume voltage2 VNR2 O Noise reduction 2 volume voltage3 GND - GND4 VNB1 O Noise blanker 1 volume voltage5 VNB2 O Noise blanker 2 volume voltage6 5D I 5V (DC/DC)Accessory (NOTCH/SQL) unit (X42-3430-00 J/10)Pin No. Name I/O FunctionCN610 (to Display (MAIN PANEL) unit A/6 CN261)1 VSNCH O Sub notch volume voltage2 VSSQ O Sub squelch volume voltage3 GND - GND4 VMNCH O Main notch volume voltage5 VMSQ O Main squelch volume voltage6 5D I 5V (DC/DC)DC-DC unit (X43-3220-00 A/3)Pin No. Name I/O FunctionCN1 (to AC/DC power supply)1 13.8V I 13.8V power supply inputPin No. Name I/O Function2 13.8V I 13.8V power supply input3 BU5V I BU5V power supply input4 DFAN1 I Fan 1 rotation signal input5 TH I Thermistor voltage input6 50VSW O 50V power control signal7 GND - GND8 GND - GND9 ACDC-SW O 13.8V power control signal10 DFAN2 I Fan 2 rotation signal input11 GND - GND12 FACDC I Fan drive voltage inputCN16 (to Final unit A/2 CN36)1 14S O 13.8V power supply output2 GND - GND3 14V O 13.8V power supply output4 GND - GNDCN80 (to PLL (MAIN) unit CN34)1 14SL O 13.8V power supply output2 GND - GND3 NC - No connection4 8AL O 8V power supply output5 GND - GND6 14SL O 13.8V power supply output7 GND - GND8 NC - No connection9 8AL O 8V power supply output10 GND - GNDCN90 (to Display (MAIN LCD BACK) unit B/6 CN301)1 14SP O 13.8V power supply output2 GND - GNDCN170 (to Accessory (SCOPE) unit A/10 CN1)1 14S O 13.8V power supply output2 GND - GND3 8A O 8V power supply outputCN174 (to RX unit A/2 CN2/ TX-RX unit A/2 CN4)1 14S O 13.8V power supply output2 GND - GND3 8A O 8V power supply output4 8A O 8V power supply output5 14S O 13.8V power supply output6 GND - GND7 8A O 8V power supply outputCN180 (to Control unit CN1, CN2, CN3)1 33SD O 3.3V power supply output2 GND - GND