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Old 10-09-2021, 01:55 AM   #20
Per Hansson
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Join Date: Jul 2005
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Line Voltage: 230v 50Hz
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Default Re: Dell 2209wa - momentarily blinks every two seconds [ Video + Audio + Service Manu

Good work on getting it fixed!
Quote:
Originally Posted by ohren View Post
Thank you for the guidance. Getting an understanding of why the cap would be at those two levels with/without PFC sounds worthwhile.
I'm not sure if I misunderstood if this was a question but here you go:
With 230VAC RMS line voltage the rectified DC voltage will be: √2 x 230VAC = 325VDC
The boosted (PFC) voltage depends entirely on how the PFC controller works so that can't be calculated without tracing the whole circuit out and reading datasheets.
P.S: The PFC circuit is normally off when the unit is in standby mode.
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