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Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Thread

Roland XP50 - blank display

Roland XP50 - blank display

2007-05-06 by letcista

When I power up my XP50 the display lights up but got no letters or 
numbers on it.
Also the sound play very strange and detuned.
Does any one in the group has experience with this kind of problem?
Service manual in pdf format also will help.
Any help will be appreciated.
Best regards.
Jos�
Portugal

Arp Avatar: Only makes sound through External Audio In

2007-05-12 by Mike B

Hi Everyone:
My Avatar only makes sound from the External Audio In input jack. There is no output from any of the line outs. I checked the voltage and it is 15+ and 15- as it is supposed to be. It does not respond to CV in (tersted using an Oddy and Omni 2). Additionally, the VCF does not self oscillate. The VCA slider will produce an increase in "backgroung hiss"
Do I really need the Hex Pickup to test this successfully?
Any help with this would be appreciated. Thanks!


letcista wrote:
Show quoted textHide quoted text
When I power up my XP50 the display lights up but got no letters or
numbers on it.
Also the sound play very strange and detuned.
Does any one in the group has experience with this kind of problem?
Service manual in pdf format also will help.
Any help will be appreciated.
Best regards.
Jos\ufffd
Portugal


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