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Vintage Synth Repair

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Roland V-Synth

Roland V-Synth

2017-07-01 by rpcfender@...

Hi

I am trying to track down information on the power supply of a V-Synth XT

Anyone with a service manual or even circuit diagram?


I need to convert from the 117V (only 13W ) to 220-240V for Australia


Anyone converted one of these power supplies?

Are they global multi-input voltage units?


Thanks


Royce

Re: Roland V-Synth

2017-07-03 by rpcfender@...

Sorry about the double post.
I thought Yahoo had swallowed the first one.

Royce

Re: Roland V-Synth

2017-07-03 by saxfred@...

Hi Royce

I am also trying to get my hands on this service manual for the v Synth XT looks like it is difficult to get I will let you know if I can get it, please tell me if you get it before ?
thanks
Fred

Re: [vintagesynthrepair] Roland V-Synth

2017-07-04 by rob hukin

Hi Royce,

Are you sure it needs converting? The service manual doesn’t show any detail for the PSU, but AC-IN is written 100 - 240V 50/60Hz, so I would assume is universal.

rob.

On 1 Jul 2017, at 04:29, rpcfender@... [vintagesynthrepair] <vintagesynthrepair@...m> wrote:


Hi

I am trying to track down information on the power supply of a V-Synth XT

Anyone with a service manual or even circuit diagram?


I need to convert from the 117V (only 13W ) to 220-240V for Australia


Anyone converted one of these power supplies?

Are they global multi-input voltage units?


Thanks


Royce



Re: Roland V-Synth

2017-07-07 by rpcfender@...

Hi Rob

No, I'm not sure.
It is on its way to Australia from the US and I am basing the voltage and power required from the picture of the back of the unit.

From uTube vids I have seen, it looks like a small switch mode supply. So it could quite easily be a universal one.
Many companies bought the PSUs from a third party that specialised in them as I believe there is a lot of expensive EMF testing needed for each new unit.

I see in my FantomX (around the same time as the V-Synth XT) the service manual indicates that there are two supplies, but also gives no details of the PSU.
For all the other boards it is very detailed.

Power Supply
AC 117 V, AC 230 V, AC 240 V (50/60 Hz)
AC 220 V (60 Hz)
Power Consumption
17 W

The Australian compliance sticker is 240 V and 17W, so perhaps they are the same PSU.
Good news if it is, but I'm not too keen on plugging it in till I know for sure.

Any chance of a copy of the SM?

Thanks for the info.

All the best
Royce

Re: [vintagesynthrepair] Yamaha CP10

2017-08-02 by Daniel Forró

I just purchased very nice vintage E piano Yamaha CP10. It’s without problem, visually like a new one, everything works, there’s just one small thing:

in higher octaves there’s relatively strong “thump” moise on each key press.

I don’t call it problem, because maybe it was like this since the leaving the factory, maybe they did it intentionally… But probably not, it’s too loud IMHO.

I have also CP35 which hasn’t it.

Can somebody confirm how it should be?

Or what could be the reason, where I should start to find the aged or even defect (?) components? I suppose something in the key assign circuit, or triggering circuit, envelope (Sustain) circuit…? Could it be some capacitor?

Unfortunately I haven’t Service manual, it’s not freely accessible on the net, and I’m afraid that one for CP11 is different.

Thank for any hint.

Daniel Forro

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