Lowrey TG98-1 User Manual

Details the features of the Lowrey Magic Genie 98 organ model series.

Details custom voicing, controls, presets, and effects for the upper keyboard.

Details controls and voices for the lower keyboard.

Details pedal bass, keyboard bass, and bass controls.

Details controls for Magic Genie Chords, strum, and arpeggio.

Details expression pedal, glide footswitch, and power switch functions.

Lists features like Leslie speaker, input/output jacks, and tone cabinet sockets.

Explains the vibrato, tone generators, and dividers circuits.

Describes upper keyboard keying, flute switching, and amplifier circuits.

Details upper keyboard collector amps, tabswitching, preamps, and modulator.

Explains lower keyboard keying, filtering, tabswitching, and auto rhythm start.

Describes the circuit operation for bass pedals.

Details upper keyboard keying, auto wow, harmonica, slow attack, and percussion.

Explains the Chord Function Generator IC and its features.

Details the operation of Magic Genie Chords and their keying.

Explains the enable circuits for 7th and minor chord components.

Describes the strum keying mechanism and its controls.

Details the arpeggio keying circuit and its operation.

Explains the High/Low Bass feature of the CFG chip.

Describes the Root/Fifth Bass mode of the CFG chip.

Explains the operation of the Boogie Woogie Bass feature.

Describes rhythm instrument circuits and their activation.

Explains the snare noise and brush keying circuits.

Details the Rhythm Function Generator (RFG) for rhythm timing.

Explains the repeat percussion modulator driver.

Describes the auto-accompaniment modulator driver.

Explains the bass keying process via the RFG and auto bass keyer.

Details the rhythm preamp for amplifying rhythm instrumentation signals.

Diagrams for Reverb, Main, and Leslie Amplifiers.

Diagram for the Power Supply circuit.

Diagram for the Automatic Organ Computer (AOC).

Procedure to adjust vibrato speed between 6-7 Hertz.

Procedure to adjust for the best Harmonica effect.

Procedure for tuning the tuning coil, likely for the TOS.

Procedure to eliminate DC transient (thump) in percussion voices.

Procedure to eliminate DC transient (thump) in accompaniment voices.

Procedure for tuning the chord tuning coil L9.

Procedure to adjust chord volume level.

Procedure to regulate AOC voltage for range adjustment.

Chart showing frequency distribution for upper keyboard voices.

Chart showing frequency distribution for lower keyboard voices.

List of parts for the amplifier, power supply, and expression pedal.

List of parts for AOC, percussion, and keyboard assemblies.

List of parts for the bass pedal assembly.

List of parts for the chord function generator board.

List of parts for console and manual assemblies.

List of parts for the Leslie tremolo unit.

List of parts for the lower keyswitch board assembly.

List of parts for the quality control board assembly.

List of parts for the rhythm board assembly.

List of parts for the tab panel assembly.

List of parts for the tone generator and pedal board assembly.

List of parts for the upper keyboard flute groups and filter board.

List of parts for the upper keyswitch assembly.