Could someone please point me in the right direction to finding the voltage regulator on the circuit board, I've a feeling that it is marked IC5 but not 100% sure.
The 9800 does have a factory set potentiometer, appologies i cant spell that word, that is factory set, if the voltage is fluctuating its because the coponents are starting to fail slightly, Despite being an awesome panel in its day, it will after 20 years start to fail im afraid.
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