TI-3 cable connections R Grieb 2/14/2016 Cables on my unit between CPU and DCO boards and between DCO boards and filter boards may not be in their original position. CPU board: XS1 XP23 To Front Panel XS2 Not Used XS3 Not Used Debug XS4 XP22 To Front Panel XS5 XP37 To Upper DCO board XS6 XP34 To Lower DCO board XS7 XP29 To Upper DCO board XS8 XP26 To Lower DCO board XS9 Not Used MIDI XS10 XP24 To Front Panel XS11 XP38 To Upper DCO board XS12 XP28 To Lower DCO board XS13 XP21 To Power Supply XS14 XP25 Noise Signal to Filter Board XS15 XP30 Noise Signal to Filter board XS16 XP1 To Battery Upper DCO board: XS1 XP32 To CPU board XS2 XP31 To CPU board XS3 XP36 To CPU board XS4 XP44 To Power Supply XS5 XP51 To Upper filter board, voice 1 signals XS6 XP60 To Upper filter board, voice 2 signals XS7 XP61 To Upper filter board, voice 3 signals XS8 XP40 To Upper filter board, voice 4 signals Lower DCO board: XS1 XP35 To CPU board XS2 XP27 To CPU board XS3 XP33 To CPU board XS4 XP39 To Power Supply XS5 XP54 To Lower filter board, voice 5 signals XS6 XP48 To Lower filter board, voice 6 signals XS7 XP47 To Lower filter board, voice 7 signals XS8 XP52 To Lower filter board, voice 8 signals Upper Filter/VCA board: 1XS1 XP41 To Upper DCO board, voice 1 signals 2XS1 XP45 To Upper DCO board, voice 2 signals 3XS1 XP46 To Upper DCO board, voice 3 signals 4XS1 XP50 To Upper DCO board, voice 4 signals XS1 XP53 Noise input XS2 XP55 To Front Panel, output signal XS3 XP59 To Power Supply Lower Filter/VCA board: 1XS1 XP43 To Lower DCO board, voice 5 signals 2XS1 XP64 To Lower DCO board, voice 6 signals 3XS1 XP62 To Lower DCO board, voice 7 signals 4XS1 XP42 To Lower DCO board, voice 8 signals XS1 XP63 Noise input XS2 XP65 To Front Panel, output signal XS3 XP49 To Power Supply Right Front Panel board: XS1 XP18 To CPU board XS2 XP17 To CPU board XS3 XP16 To CPU board XS4 XP66 Main Output to rear panel jack XS5 XP68 Headpone output to rear panel jack XS6 XP19 Input from filter/VCA XS7 XP20 Input from filter/VCA XS8 XP11 Keyboard (use lower pins of XS8) XS9 XP7 To Power Supply Left Front Panel board: XS1(10-pin) XP74 To Left-Hand Controller, Switches and LEDs XS1 is marked "XS4" on the underside of my board. XS2 XP67 XS3 XP71 To Left-Hand Controller, Wheel Potentiometers XS4 (5-pin) XP15 To Power Supply Left-Hand Controller: XS1 XP73 To Left Front Panel board, switch and LED signals XS2 XP70 To Left Front Panel board, potentiometer signals XS3 XP72 To Potentiometers