Yahoo Groups archive
Messages
Page 76 of 155 · 7723 messages matched
2008-09-21 by Keith Niver
The cabling goes to a switch on the organ that controlled the speed and switched the motor relay from fast (theatre) to slow (cathedral). You could change the
2008-09-21 by duncan
I have a model-18 leslie, which is a normal 12 guitar speaker in a box & a motor-driven styrofoam drum in front of it, venting out through extra slots in the
2008-09-21 by cinnamonrolli
Hi all, I know this is a stretch but does anyone have any information on a wurlitzer spectra tone? I ripped my hardly working organ apart and pulled this thing
2008-09-21 by mrjdevries
Does anyone know what this string synth uses for it s key bushings.. Can anyone confirm if it is the same rubber bushings as used in Pratt Reed mechanisms?
2008-09-19 by duncan
... something of an excessive load pulling it down? Could be that, or the PS, and you re assuming there without anything I m seeing posted to indicate one
2008-09-19 by Michael Kirk
For complete schematics and service data on K1000, check out: http://www.k1000.net also check out the Yahoo group for K1000/K1200. -Mike ...
2008-09-18 by r_j_d_2.phila
thanks mariano. actually, the ua723/ua748 s are still available and cheap, check mouser. the mje1100/1090 s are harder to find/expensive, but still out there.
2008-09-18 by syntherman
OOOPSS.... sorry, didn t pay enough attention to the schematic and made an ass out of myself.... the UA748 opamp used there is a 14 pin version.... even
2008-09-18 by syntherman
Greetings to all, just joined the group a while back and have had a ball reading the posts, I d like to add a humble comment over this arp 2600 power supply
2008-09-18 by Roy J. Tellason
... How about before you blame the PS you make sure that there isn t something of an excessive load pulling it down? Could be that, or the PS, and you re
2008-09-18 by r_j_d_2.phila
ok, new plan-i left the unit on for an hour, and the + rail seems solid, but -15 drifted down to -12.5. both sides of x-former were in the 23VAC range, so i
2008-09-18 by r_j_d_2.phila
yea, $200 for x-former seemed a little high, but have you seen what the CMS modules cost? $1300 for a modular VCO. so, im not surprised. their SMALLEST full
2008-09-18 by duncan
... $200 for a transformer?? a tad excessive, even with the price of copper being what it is... besides, as we have said earlier, if you re getting good 15V
2008-09-18 by jamesguitar2000
thanks, that s great to know. -J
2008-09-18 by synthparts
Hi, if you decide you want to replace the whole CPU board with a working one, I have one. Doug www.synthparts.com ... term) thanks to an ... ballroom a couple
2008-09-17 by r_j_d_2.phila
thanks alot, duncan. i ve already got the unit open. i m not an EE, but i ve done a good amount of synth/electronics work over the years, and avoid by any
2008-09-17 by jamesguitar2000
thank you mike and duncan... i indeed had the problem of crap on my CPU (to use a technical term) thanks to an overzealous confetti operator at a new year s
2008-09-17 by duncan
jamie, mike s advice is good- this is the same problem that caused the infamous insane behaviour in early/unmodified moog source units; in that case, the
2008-09-17 by duncan
... replace both the transformer AND the voltage regulators-can you help me read this schematic?(id rather just do it now while i ve got the unit
2008-09-17 by duncan
... the synth looked over by phil cirocco, and he said the transformer is causing voltage drift over time, so assuming the part is reasonable, im gonna start
2008-09-17 by Michael Kirk
Jamie, I just repaired a Roland A-90 MIDI controller with a similar problem. Unit would shut off and restart without warning. Sometimes I had to power off/on
2008-09-17 by bemccut
I was loaded patches in a juno 106 from a CD. All of the sounds are there, but the notes slide to the correct pitch on all of the patches. Can anyone tell me
2008-09-16 by r_j_d_2.phila
thanks scott-lets just say that for safety s sake, i wanted to replace both the transformer AND the voltage regulators-can you help me read this schematic?(id
2008-09-16 by jamesguitar2000
howdy folks: longtime Juno 106 user (first keyboard i ever bought in 1984 - still use the same one). i use the keyboard on stage a lot and i ve been
2008-09-16 by scott frye
Line voltage ( which drifts up n down) isnt perfect. Most devices should still work from line in AC from 105-130 VAC I would say that the regulator circuitry
2008-09-15 by Richard
Hey just wanted to pass the word about a repair item I posted on Ebay from our shop, it s a diag test board made by Ensoniq for the Mirage series samplers.
2008-09-15 by Antoine Deschênes
Good to hear! I thought that if it s working without problem on miniature easy-to-lift gold-plated contacts on CPUs, it probably won t cause any trouble on a
2008-09-15 by Shayne Cafferata
just to update: the rear defog repair kit suggestion worked like a charm. cheers! shayne
2008-09-14 by r_j_d_2.phila
thanks much, antoine. good to know mouser has them. the synth is an arp 2600. the current owner i am purchasing from had the synth looked over by phil cirocco,
2008-09-14 by Antoine Deschênes
Hi, get hold of the synth first, or attach the required schematic part if possible, it will help things. When the power transformer fails, there often is a
2008-09-14 by r_j_d_2.phila
hi folks, i ve never had to replace a transformer, but im about to come into a synth that needs the power transformer replaced. reading the schems, i know the
2008-09-12 by Shayne Cafferata
... i thought of doing this but it appears not to be an option. when pressed, the center of the keypad makes contact with 2 separate traces. one trace is
2008-09-12 by Antoine Deschênes
30 seconds Google search: Datasheet: http://www.alldatasheet.net/datasheet-pdf/pdf/860/MITSUBISHI/M50734FP.html It s based on the 6502 Wikipedia page:
2008-09-11 by Scott
HI. I m working on a K1000 that has the Mitsubishi M50734 processor The other number on the chip is D83210 Any POSITIVE input would be groovy Thanks , Scott
2008-09-11 by scott frye
I would pick Merlin s idea. Cheapest safest route and I ve been doing repairs 25+ yrs Scott Frye AudioFixation Consumer / Pro Audio Repair Southern VT
2008-09-10 by Shayne Cafferata
sounds dandeh, got the stuff, gonna give it a go. thanks again! shayne
2008-09-09 by Antoine Deschênes
I know that people used to unlock CPUs for faster speeds with that product back a few years ago, there are many miniature contacts quite close to each others.
2008-09-09 by shaynecafferata
thanks, for the helpful posts guys. i m going to try the rear defog repair kit option cuz that s what s close by and it sounds logical. i ll have to come up
2008-09-08 by r_j_d_2.phila
hi folks, just joined the group, glad to be here amongst synth repairisizers and fixificators. i ve got a polymoog 203a that is about 4 half steps off-is there
2008-09-07 by Merlin Zener
follow the traces to the components they eventually go to, and join those two points with a bridging wire, even on the other side of the board if necessary. --
2008-09-07 by paintingwithsound
Go to www.caig.com and get yourself a CircuitWriter Precision Conductive Ink Dispenser. Carefully scrape the green soldermask off and apply the conductive
2008-09-07 by Antoine Deschênes
You should be able to scrape off the protecting layer over the trace with a miniature flat blade screwdriver. Then, you could use nickel paint to patch it, or
2008-09-07 by Shayne Cafferata
i need to repair a trace on this keyboard. looks like it s the result of a spill. it s in a very delicate area - right under the rubber key trigger pad, or
2008-09-04 by eggwheatis
I also was going to add that again, a very large percentage of these problems have been caused by someone who basically didnt have a clue. It probably started
2008-09-03 by eggwheatis
Phew..I fixed the pot problem, well I think I have. I ended up taking every board out and going through them with a fine toothed comb, I cleaned any surplus
2008-08-29 by Philip
http://www.matrixsynth.com/blog/media/Moog/MemorymoogSchematics/ all the 4051 s have been swapped out by someone before me...in fact nearly every IC except
2008-08-29 by paintingwithsound
If one pot is doing it then check that pot and track leading to it. If three are doing it then look for a dud 4051 or similar (haven t seen the schematics -
2008-08-29 by Philip
Hi Scott, I ll look at that...but it doesnt seem to be caused by a single pot...I have just sprayed every single pot...no difference. Another symptom: It
2008-08-28 by scott frye
If the same pot is the one that s sticking ( locking up the values) Spray the heck out of it with some de-oxit. If that doesnt work, find out which A / D lines
2008-08-28 by conory1
Hallo, I ve owned a Multimoog from new, it still works but... I ve stopped using it because the key contacts are a nightmare. When I switch on about half the