The switchable voltage supplies don't always provide the full rated current at the highest voltage output, it depends on how they are spec'd...
If you can measure the supply voltage while operating under load, you may see a reduced or modulated voltage on the power supply when there is more current needed by the device (AN1x) than can be provided by the supply.
Bob
El Segundo, CA
----- Original Message -----
From: Oliver Fairhall
To: AN1x-list@yahoogroups.com
Sent: Thursday, October 14, 2010 23:45
Subject: Re: [AN1x] Re: Sound problems with AN1x
Thanks for the info.
I'm guessing the one you bought from Maplin, doesn't really perform as
specified.
On 14/10/10 18:54, arthtrin wrote:
>
> Its been a couple of years since I started this post. I think I know what the culprit of this problem with the sounds on my AN1x were. The culprit was the power supply. Just a few days ago I resurrected my AN1x from the attic but lost the power supply. I then found a power supply which was 12v 600mA from a hard drive I have and it worked like a charm on my AN1x with no problems with sounds going weird or fading etc. The only problem was that I had to change the internal battery. However I was a bit worried using the power supply as it is 600mA instead of the required 700mA so I went to my local Maplin store and bought a power supply with volts selector. I then adjusted the volts selector to 12V (which according to the box has 1.4amp) and connected it to my AN1x. After a while of it being connected I started having the problems with the sounds going all weird again. I then disconnected the power supply and reconnected my other power supply and it was back working normal agai
n.
>
> I am convinced that the power supply I used originally on my AN1x and the new one I bought from Maplin was and is the problem.
>
> Art
>
>
>
> --- In AN1x-list@yahoogroups.com, Jeff<jf.serviere@...> wrote:
>>
>> It looks more likely like a ribbon controller problem : play, hit it
>> gently with your fingertip and listen...maybe you'll have to open your
>> synth , clean and plug firmly the ribbon controller connector to fix it.
>> The connectors and IC sockets are often the hidden "Achille's heel" of
>> electronic devices.
>> For the supply unit : these wallwarts are often crap pieces of
>> electronics, but mine works perfectly (at the moment, maybe
>> tomorrow.??). The Yamaha unit is a bit expensive for what it is, but you
>> can try any similar supply rated at 12V - 700 mA, "+" at the center of
>> the connector. Don't try higher voltages, but a 1 amp supply will work
>> even better.
>> Cheers.
>> J.F.
>>
>> jammie a écrit :
>>>
>>>
>>> is your psu large enough as its getting hotter it sounds like the
>>> voltage is dropping i had this problem with a faulty psu it would
>>> start after 5 minutes and the sounds would start to get distorted
>>>
>>> psu are the biggest problem with any electronic equipment and
>>> wallwarts are the worst as everything is compacted into a plug size
>>> package
>>>
>>> get another psu and try that first before suspecting the synth
>>> ----- Original Message -----
>>> From: jondl_2000
>>> To: AN1x-list@yahoogroups.com<mailto:AN1x-list%40yahoogroups.com>
>>> Sent: Sunday, September 20, 2009 6:10 AM
>>> Subject: [AN1x] Re: Sound problems with AN1x
>>>
>>> --- In AN1x-list@yahoogroups.com<mailto:AN1x-list%40yahoogroups.com>,
>>> "palemilk"<palemilk@> wrote:
>>>>
>>>> --- In AN1x-list@yahoogroups.com
>>> <mailto:AN1x-list%40yahoogroups.com>, "Arthur Alexander Crichton"
>>> <ac010b4919@> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I have a problem with my Yamaha AN1x.
>>>>>
>>>>> When I select some pad sounds on my AN1x the sounds are bright and
>>>>> after about 3 seconds the sound just cuts off to a duller sound which
>>>>> is very low in volume. When I press the keys again all I get is a
>>>>> faint dull sound. I try to play the keys harder but I still get this
>>>>> sound. Before I had this problem, those paticular patches used to
>>>>> sound bright and full. Also, I have noticed some sounds sound thinner
>>>>> than what they used to and that sounds that rely on arpeggio or lfo
>>>>> sound muddy and strange.
>>>>>
>>>>> What is wrong with my beloved AN1X?
>>>>>
>>>>> I have tried cleaning the control knobs with switch cleaner but I
>>>>> still get the same problem. BTW the rom version on my AN1x is v1.02
>>>>>
>>>>> Please help.
>>>>>
>>>>>
>>>>> Arthur
>>>>>
>>>>
>>>> I realize this thread/topic is over a year old, but I recently got
>>> an AN1x again (had one a few years ago) and was experiencing this
>>> exact problem as stated in the original topic. Some patches sound
>>> normal for awhile and then suddenly sound thinner. After messing
>>> around with it for a bit trying to isolate the cause I'm 99% convinced
>>> this is a ribbon controller issue (specifically the Z axis). Applying
>>> pressure or tapping the ribbon cures the problem, but it can reoccur
>>> again after powering down and powering on.
>>>>
>>>> I plan on opening up the synth to check for a loose ribbon connector
>>> and to clean some contacts. Just wanted to add a reply in case anyone
>>> else searches this topic (like I just did) and is looking for possible
>>> answers.
>>>>
>>>> BTW, the AN1x I just picked up is a mint condition unit. First owner
>>> used it once or twice and then kept it in a closet for the past 10
>>> years. Everything was in perfect like new condition...synth, power
>>> supply, manuals, box. Software OS version is v1.03.
>>>>
>>>> Cheers,
>>>> -Todd
>>>>
>>>
>>> Gosh, we had threads on this awhile ago... the Ribbon Controller
>>> always seemed a bit unpredictable.
>>>
>>> I think the most common issue was was being able to tap the ribbon
>>> would cause it to 'hold' at that value rather than jump back to the
>>> default value and for others it would not work as advertised. It was
>>> an intermittent thing, and while some of us could reproduce the issue
>>> it was never under the same circumstances as another user, i.e. using
>>> different voices. And it seem to clear after a power on/off cycle.
>>>
>>> Sound likes you've rediscovered this issue.
>>>
>>> Jon
>>>
>>> ----------------------------------------------------------
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>>>
>>>
>>
>
>
>
>
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