Upper Voicing Schem Sht 1 Left
Right
Upper Voicing Schem Sht 2 Left
Right
Upper Voicing Layout Left Right
Lower Voicing Schem Sht 1 Left Right
Lower Voicing Schem Sht 2 Left Right
Lower Voicing Schem Sht 3 Left Right
Lower Voicing Layout All
Synth Schem Layout
Phaser Schem Left Right
Layout
Synth Control Schem Layout Left
Middle Right
Synth Control Switches Schem
Layout
String Control Schem Layout Left
Right
String Control Switches Schem
Layout
Bass Voice Schem Left Right
Layout Left Right
Power Supply Schem Layout
Block Diagram Left Right
Cabling Diagram
Front and back panel descriptions Left
Right
Connection Diagram
Here is one page from the Omni
Service Manual which explains how to adjust R33. Somehow this
information was left out of the Omni-2 Service Manual. Note:
The rest of the settings on this page are also in the Omni-2 manual,
and may be different, so it's safer to use the version in the Omni-2
manual. (The phaser clock frequencies are a little different,
for example)
(Schematics were scanned at 360 DPI, grayscale, to make them
readable. PCB layouts were scanned in color at 200DPI
Here is a link to a schematic that I captured for the
Phaser
board in my ARP Omni-2 synthesizer. It's pretty much the same as the one in the manual, but a few component values appear to have
been changed. Note: The phaser used in the original Omni is a
different design.
Here are some notes on repairing my Omni-2
synthesizer.