Moog Minimoog Manuel de service

- 1 -TheminimoogMODEL DTECHNICAL SERVICE MANUALby R. J. FolkmanCONTROLLERSOSCILLATOR BANK MIXERMODIFIERSOUTPUTmoogMUSIC INC.the first sound in synthes

- 10 -Section VI: Cover Removal and Sub-assembly Replacement In order to service the Mini-Moog circuitry, it is necessary to remove the rear cover ass

- 11 -Section VII: Adjustment Procedures and Locations Each time a Mini-Moog is serviced, it should be tuned. When a board has been replaced it will

- 12 -ADJUSTMENT PROCEDURES NOTE:The tuning and other functions rely heavily on accurate power supply voltages. Always be sure the + and - 10 volt su

- 13 -TO ADJUST . . . FOLLOW THIS PROCEDURE . . .Oscillator Tuning (Without Equipment) "Visualign"Turn all MIXER switches off. Set MIXER VO

- 14 -TO ADJUST . . . FOLLOW THIS PROCEDURE . . .Regeneration Cal. Turn all MIXER switches off. Monitor output with headphones. Set CUTOFF FREQUENC

- 15 -93-113 Oscillator: Adjustment LocationsScale RangeOsc. 1Osc. 2Osc. 3TrimmerRangeOctPoint "A"910 KFig. 1

- 16 -93-115 Power Supply: Adjustment LocationsNoise Level+10 V. Adjust-10 V. AdjustFig. 2

- 17 -93-116 Filter: Adjustment LocationsRegen. Cal.Point "A"Filter ScaleFilter Range2nd VCA 1st VCAA-44033 KFig. 3

- 18 -Section VIII: Keyboard Maintenance Occasionally it will become necessary to clean and adjust the keyboard. The contacts, although gold plated,

- 19 -Section IX: Schematics(The circuit schematics are not available at this time.)

- 2 -MINI-MOOGField Service ManualCONTENTS Section Title PageIPrecautionary Measures2II Sub-assembly Descriptions3IIIBlock Diagram5IVTrouble Analysis

- 20 -Section X: Component Locations(The component location diagrams are not available at this time.)

- 21 -Section XI: Replacement Parts Moog Part Number Description93-113 Board No. 1 Oscillator93-114 Board No. 2 Contour Generator93-115 Board No. 3 Po

- 22 -Section XII: Modifications 93-113 Oscillator Assembly (Board 1) To improve tracking and pitch stability on Mini-Moog oscillator boards

- 23 -Section XIII: Ordering and Shipping Instructions Ordering Parts Most commonly used parts are listed in Section XI. When ordering, please includ

- 24 -MOOG MUSIC, INC. SERVICE DEPARTMENT POLICY MINIMUM CHARGE (for non-warranty service) − is 1 hour ($15.00). Additional charge per 1/2 hour ($7.5

- 3 -Section I: Precautionary Measures In the Mini-Moog, as in any electrical device, shock hazards exist. All lethal voltages are conf

- 4 -Section II: Sub-assembly Description 93-113 Oscillator (Board 1) This assembly contains three tone oscillators, summing amplifiers, expon

- 5 -The external pre-amp is a three transistor high-gain amplifier. The output of the pre-amp is monitored by an overload indicator.

- 6 -Section III: Block Diagram(This block diagram is a simplified version of the one from the User’s Manual. The diagram from the service manual fit

- 7 -Section IV: Trouble Analysis Guide Use this chart along with the block diagram (Section III) to determine which assembly or compone

- 8 -MALFUNCTION PROBABLE CAUSE AND CUREExcessive drift or pitch change after key is released (greater than 1 semitone per minute)1. Defective keyboa

- 9 -Section V: Sub-Assembly LocationsPower Supply93-115 (Bd. 3)Rectifier93-118Left HandController93-060Contour Gen.93-114 (Bd. 2)Keyboard93-061Oscil