29 Oct
2022
29 Oct
'22
1:02 p.m.
Is there any kind of brightness control? Does it work at all when the screen goes white?
Sent from my iPhone
On Oct 29, 2022, at 12:56, Cameron Kaiser via cctalk
<cctalk(a)classiccmp.org> wrote:
This usually means the timer of the pulse width modulation circuit is changing.
If it’s an RC type circuit, probably the resistor is heating up and changing value. If
it’s a ic that controls the PWM then check out the IC and the components that connect to
the control pin.
That's an interesting thought. It's almost certainly an IC, though I don't
know
the details of the panel (though it looks like it's off-the-shelf, not
RDI-custom). I suppose I could start with what's in the cooling airflow zone.
My worry is if I found the marginal part(s) I'm not sure how I could easily fix
it (with my luck it won't be a discrete part).
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Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com
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