Sequential Circuits Prophet-5 Service Manual - Audiofanzine

1 J8-2 REVISION 3.2 ANALOG and POWER SUPPLY116 ANALOG INTERFACE connector is SCI //J-05^- To mate, use SL-40-5M, SCI //P-05^, The pin specifications are:WARNING! Since we have no idea what you will beIconnecting to these inputs, wecannot guarantee this interface will work with any custom device. You are completelyresponsible for any damage to the Prophet which may resultaccessories.Pin 1, GROUNDfrom connecting non-SCIPin 3, +22V, unregulated, 50 mAPin 5, -22V, unregulated, 50 mAThese two supplies have 5.1-ohm current-limiting resistors (see SD551). But accessoriesshould be fully tested with another power source before connecting to these supplies.WARNING! The Prophet can be damaged ifprotection of the Prophet, itthese supplies are tampered with. For bestis best to avoid using these supplies.Pin ^, PITCH WHEEL CONTROL VOLTAGE INPUT (P-WH CV IN)This input raises or lowers the pitch of all five voices. The voltage applied should benominally zero for the instrument to be tuned to A-4^0. Both positive and negativevoltages can be applied. The Prophet disables this input during its TUNE routine toprevent accidental detuning.Pin 2, MODULATION WHEEL CONTROL VOLTAGE INPUT (M-WHCV IN)This input ranges - +10V, with maximum modulation being applied at +10V. Do notapply a negative voltage to this input.Rev 3.2 changes to the Common Analog section are shown on SD35^. The MOD Wheelcircuitry has gained a Summer U374-8 to add the Mod Wheel CV and an external ModCV together. VGA U381-12 allows the remote voltage control, and introduces WHEELBAL trimmer R316S. Trim procedure is in Section 11.Remote PITCH CV input required switch U377-10 to disable this input during the TUNEroutine.8-^ TM1000D.2 10/81