Which Roland is it? (I’m guessing it’s an XC or XJ). I would say that it’s most likely a cap that’s causing that as it’s both channels on a single head. You could try swapping the cap from another colour and running a powerful clean and see if the fault moves with the cap?
The problem now seems to have moved on to the light magenta head now. Haven’t tried moving the capping around yet. Could this be something else other than the cap seeing as the problems on two heads now? This is on a Grenadier btw
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