Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S61SEMICONDUCTOR DATAPin No. Name I/O Function71 VCTS I Virtual com port clear to send72 MLPX2 I Multiplexer X-common data input73 MLPY2 I Multiplexer Y-common data input74 VCC - 3.3V power75 MLPX3 I Multiplexer X-common data input76 VSS - GND77 MLPY3 I Multiplexer Y-common data input78 SLDT O Sub local data output79 SLCK O Sub local clock output80 FPRG IProgramming mode request for mainMCUL: Programming mode81 EEN O EEPROM enable (backup)82 EDA O EEPROM data output (backup)83 ESI I EEPROM data input (backup)84 ECK O EEPROM clock (backup)85 PSC OPower switch control (5V/8V/LCD driverpower)H: Active86 NC - No connection87 NC - No connection88 NC - No connection89 PSC33 O Power switch control for 3.3VH: Active90 14SW O Power switch control for 14VH: Active91 VCC - 3.3V power92 LOE O Output enable for extension port IC93 VSS - GND94 LDAT7 O Data bit 7 of extension port IC95 LDAT6 O Data bit 6 of extension port IC96 LDAT5 O Data bit 5 of extension port IC97 LDAT4 O Data bit 4 of extension port IC98 LDAT3 O Data bit 3 of extension port IC99 LDAT2 O Data bit 2 of extension port IC100 LDAT1 O Data bit 1 of extension port IC101 LDAT0 O Data bit 0 of extension port IC102 NC - No connection103 ODP I Over drive protection104 RTINTB I Interrupt signal_B from RTC IC105 LE1 O Latch enable 1 of extension port IC106 LE2 O Latch enable 2 of extension port IC107 LE3 O Latch enable 3 of extension port IC108 LE4 O Latch enable 4 of extension port IC109 LE5 O Latch enable 5 of extension port IC110 LE6 O Latch enable 6 of extension port IC111 LE7 O Latch enable 7 of extension port ICPin No. Name I/O Function112 LE8 O Latch enable 8 of extension port IC113 LE9 O Latch enable 9 of extension port IC114 LE10 O Latch enable 10 of extension port IC115 PHD I Output voltage of phase detector116 AMD I Output voltage of amplitude detector117 TTI I External antenna tuner signal118 TSI I External antenna tuner signal119 MCTDET I CTCSS detection from TXMRX-DSPH: detection120 SCTDET I CTCSS detection from SRX-DSPH: detection121 PSEDA O EEPROM data output (preselector)122 PSESI I EEPROM data input (preselector)123 PSECK O EEPROM clock (preselector)124 ERDET I External reference detectH: External input125 MLDT O Main local data output126 MLCK O Main local clock output127 MLPY1 I Multiplexer Y-common data input128 MLPX1 I Multiplexer X-common data input129 ACDCTH I AC/DC temperature detection130 VSS - GND131 VD I Drain voltage input for meter132 VCC - 3.3V power133 ID I Power current voltage134 ALM I ALC meter voltage135 SFSQL I Sub RX FM squelch voltage136 SFSM I Sub RX FM S-meter voltage137 MFSQL I Main RX FM squelch voltage138 MFSM I Main RX FM S-meter voltage139 VSRM I VSR meter voltage140 VREFL - A/D converter reference “L” level (GND)141 VSFM I VSF meter voltage142 VREFH - A/D converter reference “H” level (3.3V)143 AVCC - A/D converter power (3.3V)144 RxD4 I E1 emulator communicationScope-Sub MCU: F2136ACNFKEVA(Control unit IC380)Pin No. Name I/O Function1 NC - No connection2 NC - No connection3 SMODE I E8a emulator communication4 NC - No connection5 SCDHLT I Status of scope DSPH: Normal