Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S73SEMICONDUCTOR DATAPin No. Name I/O Function203 VDDEXT I External (I/O) supply voltage (3.3V)204 GND - GND205 DATA30 I/O No connection (internal pull up)206 DATA31 I/O No connection (internal pull up)207 DATA29 I/O No connection (internal pull up)208 VDDINT I Internal (core) supply voltage (1.2V)Panel MCU: F3651KDFCKEXA(Display unit IC6)Pin No. Name I/O Function1 VREF I A/D standard voltage input (5.0V)2 AVCC I Power supply input (5.0V)3 LAT O AT LED (green)H: Light4 MPI3 I Multi plexer data input (A/D)5 LPROC O PROC key LED (green)H: Light6 SLPWM O Sub display backlight PWM control7 MLPWM O Main display backlight PWM control8 LFBK O FBK LED (green)H: Light9 LMONI O MONI LED (green)H: Light10 LHLENC O LC/HC encoder LED (yellow)H: Light11 NC - Not used12 LPON O Power on LED (green)H: Light13 BYTE I Single chipmode selection (Vss connec-tion)14 E8CNV I For E8a (fi rmware writing)15 LSPLIT O SPLIT LED (yellow & green)H: Light16 LMRX O Main RX key LED (green)H: Light17 PRST I For resetL: Reset18 XOUT O System clock output (11.0592MHz)19 VSS - GND20 XIN I System clock input (11.0592MHz)21 VCC1 - Power supply input VCC1 (5.0V)22 RITB I RIT encoder pulse B input23 RITA I RIT encoder pulse A input24 MPRE1 O Multi plexer control output for IC925 MPRE2 O Multi plexer control output for IC1026 MENCB I Main encoder pulse B input27 MENCA I Main encoder pulse A input28 SENCB I Sub encoder pulse B inputPin No. Name I/O Function29 SENCA I Sub encoder pulse A input30 MPRE3 O Multi plexer control output for IC1131 LEDBR O LED PWM control32 PBLEN O Display backlight enable output33 SLSYNC O Backlight driver IC SYNC signal for subdisplay34 LMBEF O Main BEF LED (green)H: Light35 MLSYNC O Backlight driver IC SYNC signal for maindisplay36 E8TXD O For E8a (fi rmware writing)37 VCC1 I Power supply input VCC1 (5.0V)38 E8RXD I For E8a (fi rmware writing)39 VSS - GND40 E8CLK O For E8a (fi rmware writing)41 E8BSY O For E8a (fi rmware writing)42 NC - Not used43 LMAIN O < MAIN LED (green)H: Light44 LSUB O SUB > LED (green)H: Light45 LVOX O VOX LED (green)H: Light46 LMTX O Main TX Key LED (green)H: Light47 LSRX O Sub RX Key LED (green)H: Light48,49 KI13,KI12 I Key scan input bit 13, 1250 LSTX O Sub TX key LED (green)H: Light51 LMBSYG O Main busy LED (green)H: Light52 E8EPM O For E8a (fi rmware writing)53 LREC O REC LED (red)H: Light54~57 KI11~KI8 I Key scan input bit 11~858 LMBSYR O Main TX LED (red)H: Light59 LSBSYG O Sub busy LED (green)H: Light60 LSBSYR O Sub TX LED (red)H: Light61 NC - Not used (external pull up)62 LMLOCK O Main lock LED (yellow)H: Light63,64 NC - Not used65 PTXD O The serial port for connection with themain MCU66 PRXD I The serial port for connection with themain MCU