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Old 5th Jan 2012, 1:06 am   #15
glowinganode
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Join Date: Apr 2009
Location: Aylesbury, Buckinghamshire, UK.
Posts: 1,522
Default Re: Cossor CDU110 'Scope: Brightness Probs.

Looks like lack of regulation of the -ve eht supply, floating positive as you try to draw current.
Check MR46, R67 & 68, C56 & 57.
Rob.
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