Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S227TERMINAL FUNCTIONPin No. Name I/O Function14 GND - GND15 MLSYNC O Backlight driver IC SYNC signal for maindisplay16 GND - GND17 PBLEN O Display backlight enable from panel MCU18 NC - No connection19 MBLEN O Display backlight enable from main MCU20 GND - GND21 SLPWM O Sub display backlight PWM control22 GND - GND23 SLSYNC O Backlight driver IC SYNC signal for subdisplay24 GND - GND25 NC - No connection26 5D O 5.0V (DC/DC)27 NC - No connection28 14SP I 13.8V29 14SP I 13.8V30 14SP I 13.8V31 14SP I 13.8V32 14SP I 13.8VCN2 (to Main Encoder )1 5D O 5.0V (DC/DC)2 MENCB I Main encoder pulse B3 MENCA I Main encoder pulse A4 GND - GNDCN3 (to Sub Encoder )1 5D O 5.0V (DC/DC)2 SENCB I Sub encoder pulse B3 SENCA I Sub encoder pulse A4 GND - GNDCN4 (to RIT Encorder)1 5D O 5.0V (DC/DC)2 RITA I RIT encoder pulse A3 RITB I RIT encoder pulse B4 GND - GNDCN5 (to Accessory (MULTI) unit G/10 CN607)1 LMULTI O Multi encoder LED (D613)2 LEDDIM I LED power supply 13.8V3 MULTIB O Multi encoder pulse B4 MULTIC - GND5 MULTIA O Multi encoder pulse ACN6 (to Accessory (HC/LC) unit H/10 CN608)1 LCENCB I Low cut encoder pulse B2 GND - GND3 LCENCA I Low cut encoder pulse APin No. Name I/O Function4 HCENCB I Hi cut encoder pulse B5 NC - No connection6 HCENCA I High cut encoder pulse ACN259 (to Display (F1-F7 KEY) unit C/6 CN501)1 KI1 I Key scan input 12 KI3 I Key scan input 33 KI0 I Key scan input 04 KEYO7 O Key scan output 75 KEYO6 O Key scan output 66 KEYO5 O Key scan output 57 KEYO4 O Key scan output 48 KEYO3 O Key scan output 39 KEYO2 O Key scan output 210 KEYO1 O Key scan output 111 KEYO0 O Key scan output 012 LVOX I VOX LED (D501)13 LPROC I PROC LED (D502)14 LFBK I FBK LED (D503)15 LMONI I MONI LED (D504)16 LEDDIM O LED power supply 13.8VCN260 (to Accessory (NB/NR) unit I/10 CN609)1 5D O 5.0V (DC/DC)2 VNB2 I Noise blanker 2 volume voltage3 VNB1 I Noise blanker 1 volume voltage4 GND - GND5 VNR2 I Noise reduction 2 volume voltage6 VNR1 I Noise reduction 1 volume voltageCN261 (to Accessory (NOTCH/SQL) unit J/10 CN610)1 5D O 5.0V (DC/DC)2 VMSQ I Main SQL volume voltage3 VMNCH I Main NOTCH volume voltage4 GND - GND5 VSSQ I Sub SQL volume voltage6 VSNCH I Sub NOTCH volume voltageCN262 (to Display (AF/RF VOL) unit E/6 CN503)1 VSAF I Sub AF volume voltage2 VSRF I Sub RF volume voltage3 GND - GND4 VMAF I Main AF volume voltage5 VMRF I Main RF volume voltage6 5D O 5.0V (DC/DC)CN263 (to Control unit CN65)1 PFPRG I Firmware write mode for panel MCUL: Firmware write mode2 NC - No connection3 NC - No connection