Vintage Synth Repair

I actually forgot a few :

Oberheim OB-SX - Constant crackling sound in audio output

Oberheim OB-Xa - Locks up when entering patch write mode

Moog Multimoog - Ribbon not working

Roland TR-606 - No power from batts or AC

Oberheim OB-8 - 1 voice won't tune up. Tried replacing w/other 
3340s but still doesn't tune

--- In vintagesynthrepair@y..., bigfootstudios@y... wrote:
> OK, time for me to try to get some of these old guys working 
> again... Below is a list of what I've got thats broken. If anyone 
has 
> any experience or repair tips they can offer for any of these I 
> would greatly appreciate it.
> 
> Arp Omni - No audio from synth section
> 
> Arp Odyssey mk3 - VCO2 out
> 
> Roland Promars - VCO2 out, odd front panel behavior
> 
> Prophet-5 Rev. 1 - Gee, a NW Rev. 1?? :-) Various LEDs flicker 
> and fade out on power up, no audio or controls working. 
Tested 
> voltages at power supply and voltages were off quite a bit and 
0V 
> on -5 and -15 so replaced w/new regulators and tantalum caps 
> and -5 now OK but -15V outputting -20V, WTF? Also unreg 
> measures about 28V instead of 22V.
> 
> Rhodes Chroma - All EPROMs were corroded - replaced 
w/new 
> ones but still powers up in weird state, no audio or controls 
> working
> 
> Roland SH-101 - Sequencer/LFO does not function
> 
> Roland SH-101 - Won't power up from batts or AC
> 
> Chroma Polaris - 1 voice out
> 
> Oberheim SEM - no power
> 
> Oberheim SEM - VCO2 constant high freq sound
> 
> Sequential MultiTrak - Sound is totally muffled as if VCF is 
stuck 
> w/low cutoff freq
> 
> Moog Prodigy - no power
> 
> Moog Opus-3 - Always has slow attack regardless of EG 
setting
> 
> Whew! Got my work cut out for me for sure. I am most 
interested 
> in getting the Chroma and P-5 working first. Thanks for any 
help 
> or suggestions!
> 
> Doug