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Old 19th Nov 2020, 9:43 am   #2
murphyv310
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Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 4,416
Default Re: GEC Junior Fineline - yet another fault.

You should set the control midway between going out of lock. As you increase the brightness and contrast the load increases on the line stage which is reflected back to the power supply which can alter line frequency.
All quite normal.
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