ARP Solus 1980    Weight= Lbs. Number mfg.= ? MRP=$790


User Manual: fdiskc archive or Lazy Octopus or Manual Manor
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings: Patch overlays at Synthfool
Circuit Overview: below
Scematics/Service Manual: fdiskc archive or Manual Manor
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used:
Modifications:
General Info Links: VSE





















Circuit Overview:
     A 2 vco analog subtractive synth similar to Odyssey and Axxe in many ways. External in to ring mod VCO1 is the main unique feature I think. Fairly rare synth.




















Service Tips:
     Always those tantalum capacitors that can short/drift. Here is an email describing the location of the trimmers:

Keyboard section left to right 
Pitch-bend cal
Keyboard cal
Transpose Cal

VCO2 Section Top to Bottom
VCO1 V/Oct
VCO1 Cal
VCO1 PW

LFO Section Top to Bottom
VCO2 V/Oct
VCO2 Cal
VCO2 PW

VCA Section Left to right
VCF V/Oct
VCF Cal

I labeled both the remaining two adjustments "VCF CVR" but without checking
the schematic again I can't remember what that meant! (There are actually two
controls here; one is vCF and one is VCA 'cvr' )

Hope this helps.

dj

















Parts:
Lots of discrete parts in these. Always feel free to ask or check my Parts
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