Technical service guide, repairing & restoring electronic organs 1969

Vintage 1969 technical book "Servicing Electronic Organs" for troubleshooting, repairing, and restoring organs. This has 160 pages with many illustrations, wiring schematics and diagrams, including about 6 large fold out schematics). This technical guide has sections on organ basics and voicing, tone generating systems, power amplifiers, special effects, rhythm effects and more.

This is in nice vintage condition.