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Vintage Synth Repair

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RE: [vintagesynthrepair] Re: Hammond H100

2008-04-07 by timothy kosiorek

Then I would check out the connector plugs especially the one on the rhythm unit.also check out the high low volume tab switch contacts. Tim K. direct link to

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Prophet 10

2008-04-06 by fsimon100

Does anyone have a descent schematic of a Prophet 10? I found a free one and it is hard to read. Plus it has a 12volt regulator in the schematic where I

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Tips for checking power supplies?

2008-04-06 by cockandswan

Hey guys, I have a Juno-106 that stopped turning on a little while after I had replaced a voice chip. I m still learning about electronics and I m just looking

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Re: Hammond H100

2008-04-06 by fsimon100

Tim, I now see the mechanics of the preset keys. I was curious of the comment of the contacts for my volume problem. I can hold the preset key down even though

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Re: Hammond H100

2008-04-06 by fsimon100

Bob, I think I can see where Tim is coming from on the movement of the bar. Your photos really helped. It appears you would need to spray the ends where the

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Re: Hammond H100

2008-04-06 by fsimon100

Bob, I think I can see where Tim is coming from on the movement of the bar. Your photos really helped. It appears you would need to spray the ends where the

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Re: Hammond H100

2008-04-06 by Bob

You are, of course, correct. My point is that someone who did not know any better could make a mess of things...I can just see someone emptying a 16 ounce can

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Re: Hammond H100

2008-04-06 by fsimon100

Bob, Thanks. I m certain I need to take it apart and fix it properly. Your picures gave me great insite of the mechanics. Does it disassemble from the front or

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RE: [vintagesynthrepair] Hammond H100

2008-04-06 by timothy kosiorek

I am one of only about 3 techs that work in northern ohio,Cleveland and Akron has tons of Baptist churchs, I have 40 in cleveland alone that does not count

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Re: Hammond H100

2008-04-06 by Bob

For those of you interested, I posted a couple pictures of this mechanism on my Flickr site: http://flickr.com/photos/korkeesdad/ Perhaps this will help those

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Re: [vintagesynthrepair] Hammond H100

2008-04-06 by Roy J. Tellason

... I guess you ve been lucky, then. (I ve worked on Hammonds a bit longer, started in 1975 :-) ... WD stands for Water Displacement . It s made of two

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Re: Hammond H100

2008-04-06 by Bob

I agree that the use of WD-40 is a very bas idea. WD-40 is a great product, but it has it s place...that place is not inside a Hammond. IMHO, any kind of spray

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RE: [vintagesynthrepair] Hammond H100

2008-04-06 by timothy kosiorek

Hello:I ve used this only on Hammond preset keys and not on key contacts and I ve used it for 30 years without any problems,if you take the preset keys section

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RE: [vintagesynthrepair] Hammond H100

2008-04-06 by Brian Davies

Without doubt one of the worst things to do with any keyboard is to use WD40 on it. It is intended to be used on motor vehicles, around the ignition for

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RE: [vintagesynthrepair] Hammond H100

2008-04-06 by timothy kosiorek

I see this problem with a lot of Hammonds and I usually try to cure it without taking anything apart,the grease on the mechanism gets thick with age and keeps

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Re: Hammond H100

2008-04-06 by Bob

The preset keys can have the same problem as any of the keys...that is that dirty contacts will prevent them from operating. I had the same symptoms on my H

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Hammond H100

2008-04-06 by fsimon100

H-100 My preset keys won t stay engauged. How do you disassemble to get underneath keys to fix. Also I have low volume if I hold them down manually. I know

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Re: Sh-101 problem

2008-04-06 by inocencio66

... Very good info. The cpu pin 4 reads +5. After doublechecking, d17 (octave up) is conducting both ways, and (very much hopefully!) is what´s confusing the

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Re: Repairing Korg MiniKorg 700s

2008-04-05 by robert andrew scott

Hello there, Have you managed to fix your Repeat function? I had the same problem with mine. I think something must ve shorted when I was working on that

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Re: Sh-101 problem

2008-04-05 by inocencio66

Phil, thanks once again for your help. I really had no idea. Seems the power supply is ok as all the checkpoints read ok. The other day when both the load and

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Roland AXIS-1 repair

2008-04-04 by music@carlsonarts.com

Hi everyone. I haven t gotten any responses to my post before, probably because I neglected to put anything in the subject line. I have two Roland AXIS-1

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Re: Three nonworking vintage synths

2008-04-03 by fsimon100

... ... for ... 10. ... resistors. ... on ... loop may ... odds on ... whole ... synth ... two. They ... haven t ... long since I ... don t even

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Re: Sh-101 problem

2008-04-03 by inocencio66

... One more thing: Where exactly are the cheking points for the +5 and - 5? (Assuming +15 and -14 are for the synth section only)I can only see a +5v mention

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Re: Sh-101 problem

2008-04-03 by inocencio66

Thanks for all the answers. Yes, checking the psu and power rails makes a lot of sense. Perhaps there´s nothing wrong with the cpu chip, but I can´t trace

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Re: Sh-101 problem

2008-04-02 by Scott

On one of the websites I found the other day someone mentioned that the SH-101 and the MC-202 were essentially the same innerds. This may help , if you come

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Re: Sh-101 problem

2008-04-02 by inocencio66

... Yes, but what to check? The service manual is not of much help; well at least not for me: no checkpoints nor voltage references... It seems to be the CPU

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Roland VP-330 no vocoder fault

2008-04-02 by Philip

Well I ve nearly brought my Arp Quadra back from the dead since I found a source of 8243 s in the UK. Still got a couple of buttons not working

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Re: Three nonworking vintage synths

2008-04-01 by gil_we

Are you sure this not an April Fool s hoax ?! ;) 30$ each ?? for a P10 ? Trident ? JX10 ? Sounds tooooo good to be true ! ... loop may ... odds on ... They ...

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Re: Hello and voice-to-MIDI

2008-04-01 by dwcalifornia

Thanks, Scott! I ll keep an eye out for a vocalizer. I ve got a Roland VP-70, and some singing friends and I had a lot of fun with it tonight. our soprano was

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synth not turning on (update)

2008-04-01 by cockandswan

hey guys. so i posted about replacing a voice chip in my juno 106 and it worked for a while and then randomly shut off and has not powered up since. i tried

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Three nonworking vintage synths

2008-04-01 by fsimon100

Hi, I just joined. I found three nonworking synths and bought them for $30 each. A Prophet 10, Korg Trident mk II, and Roland Super JX 10. 1)The Prophet has

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Sh-101 problem

2008-03-31 by inocencio66

The SH-101 powers up normally but the key transpose LED stays lit and all the buttons do not work. And it doesn´t make any sound. Is this a common and easy

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