Vintage Synth Repair

hi Masada,

i hope to have the omni site back up (on a different server) soon...in the
meantime, let me know if you need anything specific & i can put it up for
download

thanks, PB>>

On Fri, 12 Sep 2003, masada wilmot wrote:

> Pete, 
> 
>  
> 
> Many thanks for the schematics and sorry to hear about the job (there's a
> lot of it about). Are the other Omni files still on that server somewhere? I
> would like to get a hold of them. I'm still kicking myself for not
> downloading them when I first found your page. I thought "Hey, it's not
> going to go away is it..?" Famous last words.
> 
>  
> 
> And many more thanks to all who post schematics and service info for the old
> beasts. We appreciate it.
> 
>  
> 
> mw
> 
>  
> 
> -----Original Message-----
> From: Peter Brown [mailto:pbrown@...] 
> Sent: Friday, September 12, 2003 8:08 PM
> To: vintagesynthrepair@yahoogroups.com
> Subject: RE: [vintagesynthrepair] OMNI 2 power supply
> 
>  
> 
> On Fri, 12 Sep 2003, masada wilmot wrote:
> 
> > I've tried looking for the schematics on-line and the site where I found
> > them previously seems to be dead. Can you or someone e-mail me the power
> > supply schematic? I'll take a look and let you know if there are any
> issues
> > with parts. I'll try and give you a source for them as well. 
> 
> masada, 
> 
> sorry about the omni site goin' down (it went down along w/my job )-:
> 
> for the time being, here are links to the assembly drawing & schematics 
> for the omni power supply
> 
> http://www.cs.umass.edu/~pbrown/images/ps-assy.jpg
> http://www.cs.umass.edu/~pbrown/images/ps-schematic.jpg
> 
> also, i have attached the parts list for the power supply from the manual 
> (unfortunately, it doesn't list all parts)
> 
> hope this helps...
> 
> regards, PB>>
> 
> =====
> PC BOARD, "POWER SUPPLY"
> 
> REFERENCE              ARP PART NUMBER  ARP/MFG NUMBER    DESCRIPTION
> ============================================================================
> ====
> CR1,2,3,4,5                 1200201     1N4001            RECT, 50V, 1A
> Q3                          1303001     2N3906            TSTR, PNP, GP
> Zl                          1401301     723DC             IC, VOLTAGE
> REGULATOR
> Z2                          1400801     LM30lAN           IC, OP AMPL
> R7,8                        1000111     BW-20             RES, WW, TC, 0.68
> OHM, 1W, 5%
> R19,20                      1000915     U201R104B         POT, ROTARY TRIM,
> 100K, 1/4 W, 30%
> C8                          1100609     G-0-001-G-20-0    CAP, TANT, 1UF,
> 35V, 20%
> C6,7                        1100612     G-0-010-G-20-0    CAP, TANT, 10UF,
> 35V, 20%
> C3                          1101702     TAD250TQ50        CAP, ELECT, 250UF,
> 50V, +50-10%
> Cl,2                        1101301     TCW102V050N1R3P   CAP, ELECT,
> 1000UF, 50V, +75-10%
> Q1                          1304501     MJE1100           TSTR, NPN, PAR
> DARL
> Q2                          1304301     MJE1090           TSTR, PNP, PWR
> DARL
> T1                          5704401                       TRANSFORMER, POWER
> F1                          1700404     MDV-1/2           FUSE, PIGTAIL,
> SLO-BLO 1/2A 250V
> 
> 
> 
> 
> 
> 
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-- 
Peter Brown, Ph.D.          Senior Software Engineer
Dept. of Computer Science        140 Governors Drive 
University of Massachusetts   Amherst, MA 01003-4610
Phone: (413) 577-2505            Fax: (413) 545-1249
pbrown@...  http://www.cs.umass.edu/~pbrown