These are mostly 
PDF files, unless otherwise noted. File sizes are large, due to
grayscale 150-200 dpi scans, which are better for accurate schematic
printouts and zooming in to view assembly drawing sections, patch charts, etc.
A/DA
STD-1 Stereo Tapped Delay Owners Manual (13.8 MB)
I authored and illustrated this manual, after working on delay line prototyping and PCB development with Dave. This was such a fun device to work on. And, if you have one, you know how fun it is to use. The manual had 6 pages of blank patch charts, but I just scanned one of the blank charts.
ARP
ARP Sequencer Owners Manual (20.9 MB)
There are many copies of the Sequencer service manual around the net. But, in all my years of searching, I've never seen the Users Manual. So ... Here ya' go! This is a good introductory text on general sequencing theory and tricks, too!
ARP Sequencer Patch Chart [Homebrew] (464 KB)
ARP had a sequencer patch chart, in pad form, when the sequencer was first released. I have excerpted sections of the user manual illustrations, and generated a clean 8.5" X 11" (landscape orientation) patch chart as a PDF file. There are areas for patch name, date, and extra notes. The "Externals" column is meant to list external equipment I/O, and allow drawing lines from the patch chart up to the external item in the list, if desired.
ARP Sequencer Patch Chart [Original] (852 KB) -
added 3/22/11
Finally! I've located a decent clean copy of the original Sequencer patch chart! Many thanks go out to Mark Chaplin in PA for this excellent find! Here is the original, as implemented by the folks at ARP. I like the staff under the tuning pots! Nice touch!
ARP 3620 Keyboard Owners Manual (3.7 MB) -
ARP 3620 Keyboard Service Manual (2.1 MB)Both the Owners and Service manuals and field change bulletin for the venerable 2-note analog keyboard from ARP. Primarily seen and used with their 2600 systems. But a great live performance keyboard for use with ANY 1v/o system!
Paia
1500 Phlanger manual (17.5 MB)
1550 Stringz 'n' Thingz users manual - Testing, calibration, and operations sections only (16.6 MB)
1550 Stringz 'n' Thingz Illustrations Supplement - Circuit board parts placements, case explosions, etc. (12.2 MB)
1551 Stringz 'n' Thingz Stereo Option manual - full manual (16.9 MB)
1750 Pygmy Amplifier manual (6.9 MB)
2720-8 Keyboard manual (13.6 MB)
2720-8 Illustrations Supplement (5.7 MB)
2720-9 Glide manual (5.9 MB)
2720-11 Envelope Follower manual (14 MB)
3790 EGG manual (10.5 MB)
3790 circuit board layout - a 150 dpi scan of the bottom of a 3790, to aid in prototyping or troubleshooting - JPEG, 250K
3790 circuit board layout - a 200 dpi scan of the bottom of a 3790 - JPEG, 350K4730 Multi Modal VCF manual (30.2 MB)
4740 ADSR Envelope Generator manual (16.3 MB)
4762 / 4782 Road Keyboard manual (19.7 MB)
4783 Joystick manual - Testing, calibration, and operations sections only (2.4 MB)
Demo 1 booklet (5.3 MB)
Demo 2 booklet (5.2 MB)
Demo 3 booklet (7.6 MB)
Demo 3 booklet with alternate cover graphics (7.7 MB)
Demo 4 booklet (5 MB)
Demo Cassette booklet (combines all the above demo line pamphlets, plus more) (17.8 MB)
EK-3 Digitally Scanned Keyboard reprint (5.1 MB)
Gnome Interfacing - a Polyphony multi-article reprint (3.6 MB)
Seasons Greetings demo booklet (4.4 MB)
Using the 4700 Synthesizer - Part 1 (general synthesis theory) (11 MB)
Using the 4700 Synthesizer - Part 2 (Paia specific product info) (11.3 MB)
Shepard Function Generator - low res scans from around the net somewhere. A bit tough to read some of the graphic labels, but I thought this was an important piece to preserve. Has anyone made a circuit board layout for this? I don't think Paia ever actually made a board for it .. they just published John's design article.
Text article here
Diagrams #1 here (GIF)
Diagrams #2 here (GIF)Coming soon ??? - 6780 manual, 1974 Catalog ...
Pratt Read
1970's Pratt Read keyboard brochure (7.8 MB) -
Now here's a blast from the past ... photos, physical specs, ordering info, trivia. 4 pages. Those were the days.
Synthesis Technology
MOTM-510 WaveWarper related docs ...
Analog Devices AD538 data sheet (168 KB)
Analog Devices AD538 Ap Note 213 (396 KB)
Analog Devices AD538 Ap Note 304 (564 KB)
Thanks for looking. Let me know what manuals you are looking for, and I will try to help locate them and get them posted here.