Ota

Pin 5 of a 3080 type OTA should be 0.7V more positive than pin 4 when turned on. Troubleshoot it like a forward biased diode. Use the charts provided on the following pages along with the circuit description and block diagrams to partition a problem, then, using the schematics and parts location information on the PC boards, final diagnosis and repair can be effected. Once it is determined that an IC must be replaced, install the new one in a high quality IC socket. This will protect the...

003

004 003 003 003 003 003 003 003 003 003 003 -003 003 RESISTORS, RESISTORS, POT, TRIM RESISTORS, RESISTORS, RESISTORS, POT, TRIM RESISTORS, POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM POT, TRIM

6volt Display Regulators

There is a series of 6 volt regulators on the lower right corner of L.S.C. schematic which supplies all the lights. The 5 volt supply is not used because of the diode drops from the Darlington 2704s which have a saturation voltage of about one volt, the 2N3906 PNP transistors and the two volt drop across each LED would provide little voltage across the current control resistors R74, R75 and R76. Therefore, the 6 volt regulators are powered by the RAW 5 volt supply (provides approximately 12...

8

OSC. 1, 2 & 3 are dead but NOISE works. Check for output on U12, Pin 1, (353 TL072). Replace if no output or latched at + 15V or -15V. Signal may approach approximately 16V peak to peak, with associated mixer controls at maximum. A) Observe input signal to VCF at + side of C26. This has a 40mV p-p small signal superimposed on a +1.37V DC level. B) Set front panel CUTOFF to maximum and EMPHASIS to minimum. C) The AC signal of STEP A should appear differentially on the output of the VCF...

Caution

When disconnecting an MTA connector from a printed circuit board, be sure to firmly grip only the connector housing - NEVER disconnect it by pulling on the wire(s). In order to properly repair an MTA connector in the field it should be replaced. First remove the old contact from the housing by poking a solder pick into the side ramp thereby freeing the contact. Next, install a new contact into the housing, cut off any damaged portion of the wire and proceed as follows 1. Use an AMP pistol...

Circuitry

The MEMORYMOOG is a six voice fully programmable synthesizer in which all voicing parameters are processed and stored digitally. Interface with the synthesizer circuitry (VOICE CARDS) is accomplished with digital to analog conversion of this data and transmission to the appropriate circuit element via control inputs from the front and rear panel switches, potentiometers and keyboard. These functions are controlled by a 280 microprocessor or CPU on the DIGITAL board in response to program...

Connector Removal

Virtually all connections to the PC board are made with either CIS, MTA or RIBBON CABLE connectors. If it is necessary to remove any of these connectors during troubleshooting, do so by grasping the connector housing firmly and lifting upward. In the case of the CIS and MTA connectors, NEVER PULL ON THE WIRES. Remove the ribbon connector as you would an IC, by inserting a small screwdriver between the pins and prying with slight pressure. NEVER REMOVE A CONNECTOR FROM ITS SOCKET BY PULLING ON...

Dac Circuitry

All digital to analog and analog to digital conversion is done using the 12-bit DAC U3, 8-bit data latch U2, 6-bit data latch U1, current to voltage converter U5 and successive approximation comparator U6A. C2 and C4 are supply decoupling capacitors, C3 sets the ( frequency compensation, R10 provides VtarffO ADJUSTMENT and R8 sets the FULL SCALE level of 10.000V, with the upper eight bits ON and the lower four bits OFF. Data requiring digital to analog conversion is done simply by OUTPUTTING...

Digital Board

The CPU is at the left center of the DIGITAL BOARD schematic along with three program EPROMs and room for four 2K x 6 RAMs of which three are used. These are CMOS battery backed-up RAMs. As each instruction is fetched from emory, it is placed in the instruction register and decoded. The control sections perform this function and then generate and supply all of the control signals necessary to READ or WRITE data from or to the registers, control the arithmetic logic unit and provide all required...

Dmux Wait State Generator

All data written to the Digital to Analog Converter (DAC) is done with OUTPUT instructions. To allow the DAC time to settle and the sample and hold capacitors time to charge up, WAIT states are introduced into all OUTPUT instructions below 80 hex. The WAIT state generator consists of U31, a dual four-bit counter cascaded to form an eight bit counter, a D-type flip-flop U33 and some associated gates. As a starting point, assume the next instruction the CPU will execute is an OUTPUT instruction,...

Interface Jacks

The FOOT SWITCH and FOOT PEDAL internee buffer is U30 at the central right V> d portion of the schematic. This CMOS'WPex tri-state buffer handles- the FOOT PEDAL single bit inputs such that he processor can treat them as memory locations. It monitors J7, J8, J9 and J10, the RELEASE, HOLD, PROGRAM ADVANCE and PROGRAM BACKSTEP jacks and the two FOOT PEDAL controller input jacks J2 and J3. Pullup resistors set U30 high such that a switch closure to ground READS in either a zero or one for a...

Inv and Output Waveforms

Voltage Controlled Envelope Generator The CEM3310 is a self-contained, precision ADSR type of envelope generator intended for electronic music and other sound generation applications. Attack, decay and release times are exponentially voltage controllable over a wide range, and the sustain level is linearly voltage controllable from 0 to 100 of the peak voltage. A unique design approach allows for a 10,000 times improvement in control voltage rejection over conventional designs. In addition,...

Monophonic Scaling Adjustment On Common Analog Board

Attach Strobe tuner to OSCILLATOR 1 VOICE CARD 1 at U3 Pin 1. 2. Depress MONO button to turn it on. 4. Adjust OSCILLATOR 1 OFFSET R102 for A220. 6. Adjust OSCILLATOR 1 SUM for A880. 7. Repeat Steps 3 through 6 until a perfect 2 octave span is achieved. 8. Repeat Steps 3 through 7 for OSCILLATOR 2 (U7 Pin 1) and OSCILLATOR 3 (U10 Pin 1). 9. Depress MONO button to turn it OFF. 10. Attach Strobe tuner to OSCILLATOR 1 VOICE CARD 1 at U3 Pin 1. 12. Depress 16' OCTAVE range on each

Level Translation

Numerous switching functions of the analog synthesizer must be controlled and their data is latched by hex latches U51, U52 and U54-U61. Since the analog data of these switch controls have various levels, their on off control lines switch from +7.5V to -7.5V, OV to +15V or as TTL levels. Buffer U50 and transistors Q2-Q7 translate six bits of the buffered data buss to the +7.5V to -7.5V level and the OV to +15V level. Buffer U53 and Q8-Q12 translate the CLOCK LINE to the +7.5V to -7.5V level.

Master Summing Circuits

In the top center of the schematic are U15, U16 and U17, 4558 inverters that sum inputs for OSCILLATORS 1, 2 and 3 respectively. Each one is followed by another inverter stage of the same IC. Each has OFFSET, OCTAVE and SUM adjustment trimmers. All OSCILLATORS sum PITCH, OCTAVE, MONOPHONIC MODULATION AND TRANSPOSE and then uniquely sum specialized functions like OSCILLATOR 2 FREQUENCY, OSCILLATOR 3 FREQUENCY, etc. The LOW FREQUENCY KEYBOARD CONTROL, for example, is a special control input for...

Oscillators

3 Audio oscillators - range 16', 8', 4', 2*. (Range is extended to 32' with transpose switch in performance area). Waveforms available variable pulse, sawtooth and triangular. Oscillators 2 i 3 have dual concentric frequency pots center knob for fine tune (12 turns), outer knob for coarse tune. Sync Osc 2 to Osc 1. Osc 3 acts as an audio or modulation oscillator. Osc 3 rate .2 Hz to 8 KHz . VOICE MODULATION Osc 3 signal or filter contour may be routed to Osc 1, 2, pulse width 1, 2 and or...

Potentiometer Editing

Pot editing is accomplished by detecting pot movement. When a pot is moved, its output replaces the stored program data from memory. In order to detect pot movement, all pot positions must be known at all times. When the unit is turned on it runs a power-up software routine that converts all the analog pot voltages to digital data and records this data in a position table called POTPOS. This POTPOS table is constantly updated in order to maintain current pot position information. The software...

Powee Shutdown Circuit

Just below the battery backup circuit is the power shut-down circuit, consisting of U23A, 01 and associated components. CR2 is connected, through harnessing, to the power supply transformer secondary ahead of the main filter capacitor on the +15V supply. The raw AC voltage is half wave rectified by CR2, filtered by Cll, R18 and R19 and clamped from going above +5V by CR3. This results in a half-wave rectified waveform clipped at +5V with a rise time following the line voltage and an extended...

Removing The Base

With the unit right side up on the workbench nd the keyboard facing away, remove the three (3) self-tapping sheet metal screws on the rear panel. Remove the nine (9) self-tapping sheet -aetal screws, three (3) on either side, three (3) along the front of the base, by letting the edge of the unit hang over the end of the bench. Separate the cabinet from the base, making sure to clear the front edge of the keyboard. Lean the cabinet back onto its rear panel. NOTE Do not attempt to remove screws...

Removing Voice Cards

There are six (6) VOICE CARDS mounted in a three layer sandwich formation. The two (2) top right-hand boards (VOICE CARDS A i B) are mounted back-to-back with the center two (2) boards (VOICE CARDS C i D) using four (4) screws. The two (2) rear screws attach the four (4) boards to hinged standoffs, spacers and fish paper. VOICE CARDS E & F are mounted to the base of the unit. The top four (4) VOICE CARDS must be removed in order to remove these two (2) VOICE CARDS. VOICE CARD E is located at...

Sound

The design of the MEMORYMOOG is very similar to the MINI with three oscillators, two contour generators, MOOG 24db per octave filter and a voltage controlled amplifier. In addition, it includes other features to further improve the sound generation possibilities. To the oscillators is added sync and variable pulse width. The contour generators were expanded to four parts with three modes of operation, including a mode where the attack, decay and release times track the keyboard for better...

The Audio Output

At the lower left hand corner, the audio output from each VOICE CARD is summed together. Notice that VOICES B through F have individual trim pots to match the output VOLUME of each VOICE CARD to the A VOICE. The output is summed into a 3360 VCA which has a programmable output signal from the DMUX board such that a preset volume can be established for different programs. Therefore, FILTER CUTOFF variations can be compensated for with PROGRAMMED VOLUME levels. The output of the VCA is routed to...

The Modulation Oscillator

The 3340 U22 is the MODULATION OSCILLATOR which has a rate control input which is taken from the CPU. It also has a modulation RESET input for ARPEGGIATOR functions which is software controlled such that a note played on the keyboard when in the ARPEGGIATOR mode, develops a short spike. This spike goes to 08 which momentarily shorts out the OSCILLATORS. It's like a SYNC input whereby the OSCILLATORS can be RESYN'd while playing to keep everything in time. The outputs are connected...

The Oscillators

Starting at the upper left hand corner of the schematic is OSCILLATOR ONE consisting of a 3340 VCO which outputs TRIANGLE, SAWTOOTH and variable width rectangular pulse waveforms. Refer also to the accompanying VOICE CARD block diagram. Since loading of the TRIANGLE and SAWTOOTH outputs can effect the oscillator frequency slightly, high value base resistors are used. Each one of the outputs feed a 4016 switch and a 3360 VCA. All the waveforms are summable such that SAWTOOTH, TRIANGLE and...

Foot Pedal Input Adjustment

Plug shorting jack into FOOT PEDAL 1. 2. Attach a STROBE tuner to OSCILLATOR 1 VOICE 1 (U3 Pin 1) and turn FOOT PEDAL AMOUNT controls 1 and 2 fully CCW. 3. Depress lowest A on keyboard. 4. Depress FOOT PEDAL PITCH button to turn it ON. 5. Adjust F.P.I ZERO R8 on COMMON ANALOG board for no pitch shift. 6. Turn FOOT PEDAL AMOUNT 1 to maximum. 7. Adjust F.P.I OFFSET R3 for no pitch shift. 8. Depress FOOT PEDAL PITCH button to turn it off. 9. Attach STROBE tuner to OSC2 VOICE 1 (U7 Pin 1). 10....

Power Supply

The power supply includes printed circuit board assembly, fan, heat sink, split primary transformer and a bottom mounted plate that converts 100 120 to 220 240 Volts. The plates include a connector and all the appropriate fuses including secondary fuses. Regulation is accomplished with 723 regulators, MPSU05 drivers and a series of TIP41 pass transistors. There is a raw 5V tap which feeds the FRONT PANEL LEDs and a tap of the +15V supply for the power shutdown circuit on the DIGITAL board. The...

Removing The Digital Board

The DIGITAL BOARD is held in by four (4) screws. The rear screws attach the board to hinged standoffs. The DIGITAL BOARD is also attached by a tie-wrap to the COMMON ANALOG BOARD. Note the use of insulation (fish paper) on the trace side of the board. REMOVING THE COMMON ANALOG BOARD The COMMON ANALOG BOARD is held in by four (4) screws. The rear screws attach the board to hinged standoffs. The COMMON ANALOG BOARD is also attached by a tie-wrap to the DIGITAL BOARD. Note the use of insulation...

Reading Recommendations

The following books are recommended for additional information on micropeocessors like the 280. These are general references not related to MEMORYMOOG but contain important system concepts. TRS-80 MICROCOMPUTER TECHNICAL REFERENCE HANDBOOK, Catalog 26-2103, 1978. PROGRAMMING THE Z80 by Rodney Zaks, 1980 2nd Edition from SYBEX CZ80, Printing 10587654321 1SBNO-8958 8-04 7-4. FRONT PANEL CONTROL BOARDS 6 t 7 Left and right aide control board (L.S.C. & R.S.C.) switch cicuitry is almost identical...

Linear Ic

A linear IC with DC Input Offset measured between the + and - inputs should be no greater than lOmV apart or device is faulty. POWER SUPPLY SUBASSEMBLY TROUBLESHOOTING Troubleshoot the power supply subassembly using the circuit description. Note that voltage levels displayed on the schematic diagrams are not absolute values as reari jus may vary between units. Once the probl Uls localized, check the .suspected part by direct substitution if possible. Otherwise, use a voltmeter or oscilloscope...

008 009 001

INSULATOR, FISH PAPER 6.4 X 16.1 END CAP, LEFT HAND ALUMINUM END CAP, RIGHT HAND ALUMINUM LOGO, MEMORYMOOG ALUMINUM COVER PLATE ALUMINUM HOUSING, CABINET COMPLETE FRONT PANEL, ALUMINUM BASE, ALUMINUM STIFFENER, BASE ALUMINUM BRACKET 3 4 X 13 16 X 5 8 BRACKET 1 X 1 X 5 8 BRACKET 1 X 5 16 X 5 8 DOUBLER PLATE. BASE SIDE PANEL, LEFT SIDE WOOD SIDE PANEL. RIGHT SIDE WOOD TRIM, BLOCK HOUSING WOOD TRIM, CENTER BRACE WOOD TRIM, FRONT KEYBOARD WOOD TRIM, RIGHT SIDE WOOD TRIM, LEFT SIDE WOOD

S 4 H And Noise Circuitry

Included in the MODULATION OSCILLATOR output to U11B is the SAMPLE AND HOLD and NOISE outputs. In the lower right hand corner, the output from the MODULATION OSCILLATOR PULSE is used as a sampling pulse for the SAMPLE AND HOLD. Also, located there is U25, a 5837 pseudo-random digital noise generator followed by a pink noise filter and gain recovery amp U26A. The pink noise output is fed to a 3360 VCA volume control which is buffered by a 4558 U26B and routed out the NOISE buss to all VOICE...

System Controller Codes

CO Sequentially flashing LED's - a service routine CI - Cassette Save C2 - Cassette Load C3 - Cassette Verify C4 - Defeats voices sequentially - a service routine C5 - Frequency center for Osc 2 & 3 to Osc 1 (zero beats) C6 - Tuning Calibration - defeats auto tune servicing) C8 - Program enable and disable C9 - live front panel (programming) DO - through D9 are program sequence codes A - advance program chain B - back step program chain OUTPUTS Programmable volume for program level...

Switch Contact Replacement

If it is necessary to replace a spring contact switch or a contact button, extreme care must be taken when installing the new components. The contact button is replaced by first removing the switch contact, then the contact button. The contact button must be seated against the PC board. The contact button may also be inserted using an AMP hand tool, model number 274262-1. The spring contact may be replaced using AMP tool number 274268-1 or by hand. When inserting by hand, use extreme caution...

Fuse Cover

997-045885-002 FUSE PLATE ASSEMBLY (5) 806-023039-006 SCREW, PAN HEAD BLACK CLIP TYPE LAG LAG LAG (1) 962-0459 31-001 PLATE, ALUMINUM (1) 969-045948-001 SHIELD, FISH PAPER 220 VOLT EXPORT 4-40 X 3 8 5 X 20MM 5 X 20MM 800MA 5 X 20MM 315MA 5 X 20MM 3.15A FUSE COVER FORMED

Voice Modulation

OSCILLATOR 3 also has a few differences from OSCILLATOR 1 in that the KEYBOARD VOLTAGE can be disconnected through the 4016 switch U10 and instead used as a modulation source. The modulation is only about one hertz, however, driving the 3340 VCO's with a control voltage input of such a low level causes the TRIANGLE waveform to be unsymetrical. Therefore, Q2 is used as a low frequency switch. With the low frequency switch on, Q2 is turned on and places a .033uf capacitor, C23, in parallel with...

Introduction

Most of the adjustments below are interdependent procedures which MUST be performed in the order presented, however, normal oscillator recalibration HILL NOT require all steps to be performed. The Memorymoog PROMs have a considerable mount of diagnostic software built in, therefore, try the SOFTWARE TUNING procedure FIRST and the test equipment procedure only as necessary. The replacement of an IC that has an associated trim potentiometer will require recalibration, except that the replacement...

Polyphonic Glide

The DMUX board generates six independent pitches for each of the VOICE CARDS. To add polyphonic glide to each voice, in the upper left-hand corner of the schematic i6 an input line labeled POLYGLIDE. It is basically a linear glide circuit which uses a 3360 VCA. The signal for each one of the VOICE CARDS comes in on lines S32-2 through 9 and is divided down with .01 matched resistors to obtain a precise 50 reduction. These lines are applied to a 4558 which is connected as a comparitor, the...

Abbreviated Oscillator Tuning With Equipment

Using test equipment, a shortened oscillator tuning procedure may be accomplished as follows Perform POWER SUPPLY, DMUX and PRELIMINARY OSCILLATOR TUNING (Steps I, II and III) omit the next four steps - preliminary CONTOUR GLIDE, preliminary COMMON ANALOG, FILTER tuning and VCA balance (Steps IV, V, VI and VII) -unless an associated part has been replaced proceed with MAIN OSCILLATOR TUNING (Step VIII), MONOPHONIC SCALING adjustments (Step IX) and LHC -OCTAVE TRANSPOSE (Step X). Therefore,...

Main Oscillator Tuning

NOTE POWER SUPPLY and DMUX board adjustments must be verified with a 4-1 2 digit DVM before tuning is attempted. Set up FRONT PANEL controls as in Figure 3 and 15. Adjust OSCILLATOR 1 OCTAVE trim R104 for A880. 16. Repeat Steps 12 through 15 as necessary until a perfect 3 octave span is achieved. 17. Repeat Steps 12 through 16 for 0SC2 (U7 Pin 1) and 3 (U10 Pin 1). 18. Press AUTOTUNE button and the display will show 6 TUNED after about six seconds. 1. Attach Strobe tuner to the PULSE output of...

Caution Keyboard Protection

, REMOVING DMUX BOARD The DMUX BOARD is mounted below the DIGITAL and COMMON ANALOG BOARDS using four (4) standoffs. These two (2) boards must be removed to remove the DMUX BOARD. Before proceeding with further disassembly or servicing, care should be taken to protect keyboard from -Scratches from solder spikes of printed circuit boards. -Chemical reaction of special cleaners or sprays to the plastic key parts. It is suggested that the keyboard be covered with a piece of soft foam or similar...

Dac Zero Output Adjustment

Attach the plus side of the DVM probe to the far side of R67 on the DMUX board. 2. Depress the 16' octave switch of OSCILLATOR 1. 3. Adjust R10, (DAC ZERO trim) on the DMUX board for 0.000 volts. DAC FULL SCALE ADJUSTMENT (4-1 2 DIGIT DVM REQUIRED) 1. Depress the 2' OCTAVE switch on OSCILLATOR 1. 2. Adjust R8, the DAC FULLSCALE trim on the DMUX board to 10.000 volts. III. PRELIMINARY OSCILLATOR TUNING FRONT PANEL SET-UP 1. Attach the DVM positive lead to the wiper of the TUNE pot and set the...

Adsr Contour Circuitry

The contour lines enter from the DMUX board at the upper left hand portion of the schematic where the ATTACK, DECAY and RELEASE are buffered and applied to the 3310 Contour Generator. The usual ADSR contour includes an ATTACK, two holds and a RELEASE, but if a second note is played the contour would start back up from whatever DECAY or RELEASE setting it subsided to and reach its ATTACK setting more rapidly than is normal. This is not a desirable condition for the rearticulation of chords,...

Foot Pedal Circuitry

Starting at the upper left-hand corner of the schematic, analog control voltage from the rear panel FOOT PEDAL(s) is applied to UlA and U1B, the 3360 VCAs. FOOT PEDAL control AMOUNT is applied through the linear control inputs of the 3360 (pins 5 and 10 respectively) by a preprogrammed amount from the FRONT PANEL controls. The signal is buffered by a 4558 U2A& B and applied to a series of 4016 ENABLE switches driven from DEMUX board latches. Depending on what is selected from the FRONT PANEL...

Removing Front Panel

It is recommended, for ease of service, to remove the POWER SUPPLY (See POWER SUPPLY removal) before attempting the removal of the LSC. Once the CONTROL BOARD is removed, it may be placed on the DIGITAL BOARD COMMON ANALOG assembly using a cardboard separator or similar material. The POWER SUPPLY may temporarily be reinstalled for unit servicing using the two (2) inside screws. To remove the LSC board, remove the control knobs and the eleven 5 16 hex nuts, taking note of four (4) fiber washers...

Copyright 1982 Moog Music

Since you have proceeded this far in your reading, you have already demonstrated a ceen interest in at least four endeavors music, electronics, computers and, of course, SYNTHESIS. This manual can provide you with added depth in this multi-faceted knowledge and improve your long-term synthesizer musicianship. This is a preliminary service manual which will be available in final form during the first quarter of 1983, so if you or your service engineer have comments concerning the format or...

The

The VCF filter is a 24dB octave patented Moog filter and it uses an IT122 monolithic matched transistor pair at the top and bottom of the filter ladder to cut down on voltage offsets and improve the current control signal rejection. All the outputs of the OSCILLATORS and the NOISE source are coupled to the base of 011 2 via C26. Qll 1 and 2 convert the input signal to a differential signal current in the ladder. The collector, capacitor C31, and the next set of emitters 09 and 10 form a 1 pole...

Arpeggiator

Unlike conventional arpeggiators that are limited to playing notes up and or down the keyboard, the arpeggiator in the MEMORYMOOG is more like a micro sequencer in that it arpeggiates notes in the order depressed. The arpeggiator will then play them forward or forward and backward. This gives a variety of musical patterns limited only by imagination. The notes can be latched so the arpeggio will continue to play after key release. Notes in the pattern can be replaced in real timr-Hsy adding new...

Memorymoog Display Boards

ELECT. 10 UFD 25V ELECT. 10 UFD 25V C20-C22 947-04518 3-104 CAPACITOR, CERAMIC TUBULAR .1 UFO ELECT. 220 UFD 16V TUBULAR .1 UFD TUBULAR .1 UFD ELECT. 220 UFD 16V TUBULAR .1 UFD BOX 4.7 NFD PC MTG. LINEAR 10 GLIDE MTG. LINEAR 10K BEND AMT MTG. LINEAR 10K MOD AMT MTG. LINEAR 10K FT. PED. 1 AMT MTG. LINEAR 10K FT. PED. 2 AMT MTG. LINEAR 10K MOD RATE MTG. LINEAR 10K VOICE MOD OSC 3 MTG. LINEAR 10K VOICE MOD VCF MTG. LINEAR 10K TUNE MEMORYMOOG DISPLAY BOARD PARTS LIST REF DES PART 2 904-041406-009...

Keyboard And Case Maintenance

To clean the wood end caps, the aluminum chassis and front panel overlays, a damp cloth with a mild detergent is sufficient. The keyboard may also be cleaned by using a damp cloth and mild detergent. However, if there is light dirt or scratch marks on keys, hand rubbing with a fine polishing compound works best. For deeper scratch marks or ground-in dirt, a variable high speed drill with cloth buffing wheel is recommended. The buffing wheel should be used carefully with a small amount of fine...

Noting The Autotune Parameters

O Hit C, 7, ENTER and ENTER again the display will then query VOICE hit the number of the voice above, which was out-of-tune, BUT DO NOT HIT ENTER Wait a second and the display will then query OSC hit the number of the oscillator above which was out-of-tune but, again, DO NOT HIT ENTER the display will then flash an expanded scale version of the AUTOTUNE voltages in a hexidecimal HEX format indicating from left to right a two digit RANGE, SCALE and HIGH TRIM code. O WRITE THESE VALUES DOWN with...

Performance Orientation

Programming is made easier by first making almost everything programmable except for tune, final volume and headphone volume. Secondly, a full complement of knobs and switches have LED indicators. These first two features allow set-up of your personal programs just like a non-programmable monophonic synthesizer. Next, there are 64 locations where these programs can be stored. If 64 is not enough, included is a cassette interface so programs can be stored on an inexpensive audio cassette deck...

Voice Card Troubleshooting Guide

The MEMORYMOOG has a software routine to isolate defective VOICE CARD OSCILLATORS. Depress the AUTOTUNE button and observe the display. In 5 to 10 seconds, the display will show X tuned, where X is the number of usable voices. X will equal 6 if all VOICE CARDS are good. If X is less than 6, faulty VOICES can be isolated as follows 1. Depress C7 followed by ENTER twice. 2. The display will show VOICE 7. 3. Depress any VOICE number 1 through 6 desired To be tested, where VOICE A 1, VOICE B 2,...

Power Supply Adjustments

-15V SUPPLY ADJUSTMENT 4-1 2 DIGIT DVM 1. Attach the negative DVM probe to the negative side of C74 and the positive probe to the negative side of C75, both on the DMUX board. 2. Adjust R8 on the POWER SUPPLY board for 15.000 volts. 15 VOLT SUPPLY ADJUSTMENT 4-1 2 DIGIT DVM REQUIRED 1. Attach the positive lead of the DVM to the plus side of C74 on the DMUX board. 2. Adjust R19 on the POWER SUPPLY board for 15.000 volts. 1. Attach the plus lead of the DVM to the positive side of C73 on the DMUX...

Battery Backup

RAM battery backup is accomplished by a 78M05C 5-volt regulator that is used to generate a 5.6 volt supply for the RAMS. A 5.6 volt supply voltage is obtained by using a diode drop in the common leg of the regulator to ground which biases the common to 0.6V. The diode in series with the output drops it back down so at the junction of the three diodes, CR4, CR5 and CR6, the VRAM supply ends up at approximately 5 volts again under normal circumstances. A lithium battery voltage source provided...

Memorymoog Specifications And Functions

The Memorymoog is a versatile six-voice, programmable polyphonic synthesizer with the classic Moog sound, boused in an anodized aluminum cabinet trimmed with selected walnut. All Menorymoog functions are under the control of a Z-80 micro-computer which continually monitors the soundpath, responding to all performer input through the keyboard, panel controls, foot pedals and system controller. The front-panel settings are stored as a program. The Memorymoog will remember 100 programs. These are...