Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S213TERMINAL FUNCTIONPin No. Name I/O Function3 5A O 5V power supply output4 GND - GND5 5B O 5V power supply output6 GND - GND7 14V O 13.8V power supply output8 GND - GNDCN190 (to DSP unit CN1/ DC-DC (APP) unit C/3 CN804/Digital unit CN1)1 33V O 3.3V power supply output2 GND - GND3 5D O 5V power supply output4 GND - GND5 14AF O 13.8V power supply output6 GND - GND7 14V O 13.8V power supply output8 GND - GND9 GND - GNDCN210 (to DSP unit CN50)1 SP I AF for internal speaker2 SPG - Speaker GNDCN211 (to INT. SP)1 SP O Speaker output2 SPG - Speaker GNDCN220 (to PLL (MAIN) unit CN33)1 R10M O 10MHz reference signal (Coaxial)CN222 (to 10MHz IN)1 R10M I 10MHz reference signal input (Coaxial)CN226 (to EXT AT)1 14S O 13.8V power supply output2 GND - GND3 TT I/O External AT IN/THROUGH control4 TS I/O External AT tuning start control5 GND - GNDCN230 (to Control unit CN70)1 EXTPF2 I/O External PF1 signal2 EXTPF1 I/O External PF2 signal3 50VSW I 50V power control signal4 CCTS O Clear to send5 CTRS I Request to send6 CRXD I Received data7 CTXD O Transmitted data8 ODP O Over drive protection9 X45V1 O X45 version detection10 X45V2 O X45 version detection11 PSC33 I 3.3V switching power control12 14SW I 14V power controlPin No. Name I/O Function13 PSC I 8V/5V switching power control14 ACDCTH O AC/DC power thermistor voltage output15 ACDC-SW I 13.8V power control signal16 GND - GND17 NC - No connection18 GND - GND19 X53V2 O X53 version detection20 BKC O BU5V voltage detection21 BOVER O Over voltage detection (Over 19V be-comes “H”)22 GND - GND23 DATA I Shift register data24 CLK I Shift register clock25 MLPY1 O Multiplexer output 126 MLPY2 O Multiplexer output 227 ADC2 I Multiplexer control signal 228 ADC1 I Multiplexer control signal 129 MRXC I Main RX control signal30 VD O Drain voltage output terminal31 TH33B I 3.3V power supply for thermistor pull up32 MFEN1 I Shift register enable signal 133 MFEN2 I Shift register enable signal 234 MFEN3 I DAC enable signal35 AFEN I Shift register enable signal 336 ATPWS I AT relay operation stops when power isON37 TS I/O External AT IN/THROUGH control38 TT I/O External AT tuning start control39 AMD O Amplitude detector output40 PHD O Phase detector outputCN270 (to DC-DC (LINK) unit C/3 CN400)1 PHD I Phase detector input2 AMD I Amplitude detector input3 ATPWS O AT relay operation stops when power isON4 AFEN O Shift register enable signal5 MFEN3 O DAC enable signal6 MFEN2 O Shift register enable signal 27 MFEN1 O Shift register enable signal 18 X53V2 I X53 version detection9 VD I Drain voltage input terminal10 MRXC O Main RX control signal11 FFANP2 I Final fan 2 rotation pulse input12 FFANP1 I Final fan 1 rotation pulse input13 FFANAT I AT fan rotation pulse input14 NC - No connection