Author Topic: Help with faulty organ  (Read 4265 times)

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Monkeyman

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Help with faulty organ
« on: May 06, 2015, 07:58:23 PM »
Hi, first timer here.  I have an early 90's Johannuss Opus 275 which has done serviceable job for the last few years but now all the stops cut out within about 90 seconds. Switch it off a couple of minutes and it will work again for 90 secs. It seems to be something is warming up and cutting out. Does anyone have any ideas if this is an easy fix.

This organ does have midi, does anyone think The midi output could work with this fault?

Thanks
« Last Edit: May 06, 2015, 08:20:09 PM by Monkeyman »

dragonser

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Re: Help with faulty Johannus
« Reply #1 on: May 08, 2015, 01:00:57 PM »
Hi,
as the Organ has a midi output then it would be possible to connect it to another midi device and see if the midi continues when the sounds cut out.
if it does than the fault could be with the amplifier or sound generation circuits.
If there is a fault with the power supply that could stop either part or the whole Organ working.
I guess it depends how familiar you are with electronics as to how easy a fault it might be.
regards Peter B

Monkeyman

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Re: Help with faulty organ
« Reply #2 on: May 09, 2015, 06:11:19 PM »
Thanks for the reply. I have tried to check the midi output and it doesn't seem to work :(
When the stops cut out the power is still working (power lights on and speakers buzzing). Not really great at electronics and when I take the back off it looks like an old episode of Dr Who. Have checked all the fuses but everything OK.

David Pinnegar

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Re: Help with faulty organ
« Reply #3 on: May 10, 2015, 02:13:42 PM »
It would be helpful to get the circuit diagram - service manuals are available from http://www.wdgreenhill.com/manu/johannus.htm

but possibly a phonecall to Makins. Whether anyone other than David Fetterman knows the idiosyncracies of these instruments will be interesting to know.

Best wishes

David P

Barrie Davis

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Re: Help with faulty organ
« Reply #4 on: May 10, 2015, 03:56:29 PM »
Hi,
It might be worth trying Royston Orme of Ormatronix as his knowledge is vast you will find his telephone number on his web page.

Best wishes

Barrie

Monkeyman

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Re: Help with faulty organ
« Reply #5 on: May 12, 2015, 07:02:27 AM »
Thanks for the people to contact David and Barrie, I will give them a ring to try and get to the bottom of this fault.  :)

 


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