Kenwood TS-990S Service Manual
Also see for SP-990: Instruction manual
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TS-990S66SEMICONDUCTOR DATAPin No. Name I/O Function3 D0 I Data bit 04 D1 I Data bit 15 ADC2 O Multiplexer control signal 26 MBLEN O Main bucklight enableH: Enable7 D2 I Data bit 28 D3 I Data bit 39 MABK1 O AF blanking 1 for TXMRX-DSPH: Mute10 GND - GND11 LE I Latch enable12 MABK2 O AF blanking 2 for TXMRX-DSPH: Mute13 D4 I Data bit 414 D5 I Data bit 515 SABK1 O AF blanking 1 for SRX-DSPH: Mute16 SABK2 O AF blanking 2 for SRX-DSPH: Mute17 D6 I Data bit 618 D7 I Data bit 719 PRST O Panel MCU reset signalL: Reset20 VCC - 3.3VExtension Port IC: TC74VHC373FT(Control unit IC37)Pin No. Name I/O Function1 OE I Output enable2 MFEN1 O Shift register enable signal for fi nal unitand ANT tuner unit3 D0 I Data bit 04 D1 I Data bit 15 MFEN2 O Shift register enable signal for ANT tunerunit6 MFEN3 O D/A converter enable signal for fi nal unit7 D2 I Data bit 28 D3 I Data bit 39 AFEN O Shift register enable signal for ANT con-nector unit and ANT switch unit10 GND - GND11 LE I Latch enable12 NC_TR O No connection13 D4 I Data bit 414 D5 I Data bit 515 ATPWS O Stop operating AT relays, power ON16 TTO O External antenna tuner signal17 D6 I Data bit 6Pin No. Name I/O Function18 D7 I Data bit 719 TSO O External antenna tuner signal20 VCC - 3.3VExtension Port IC: TC74VHC373FT(Control unit IC38)Pin No. Name I/O Function1 OE I Output enable2 MLSEN O Main local shift register enable3 D0 I Data bit 04 D1 I Data bit 15 RDEN O Reference DDS enable for main localunit6 MLRST O DDS1 reset for main local unit7 D2 I Data bit 28 D3 I Data bit 39 MDEN1 O DDS1 enable for main local unit10 GND - GND11 LE I Latch enable12 MDIO O DDS1 I/O_update for main local unit13 D4 I Data bit 414 D5 I Data bit 515 MDEN2 O DDS2 enable for main local unit16 MPEN1 O Main Pll1 enable for main local unit17 D6 I Data bit 618 D7 I Data bit 719 MPEN2 O PLL2 enable for main local unit20 VCC - 3.3VExtension Port IC: TC74VHC373FT(Control unit IC39)Pin No. Name I/O Function1 OE I Output enable2 TXC O TX ON/OFFH: TX ON3 D0 I Data bit 04 D1 I Data bit 15 CKY O CKY mute signalH: Mute6 SRXC O Sub RX ON/OFF control signalH: SRXB (8V) ON7 D2 I Data bit 28 D3 I Data bit 39 DC12SW OSwitch signal for digital 1.2V DC/DCconverterH: Active |
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