Re: iMAC G5 Power Supply API4PC46-290 REV.A pin 8 no voltage
Ok Anyway so is this the PFC MOSFET that is not turned on or could be bad?
Ok Anyway so is this the PFC MOSFET that is not turned on or could be bad?
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Re: iMAC G5 Power Supply API4PC46-290 REV.A pin 8 no voltage
No. PFC is only on when the supply is on, not in standby.
There is no "PFC MOSFET" per se. Just the main switchers.
You are showing output voltages in standby. You should not.veritas odium paritComment
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Re: iMAC G5 Power Supply API4PC46-290 REV.A pin 8 no voltage
Final determination was a wrong type of transistor was used in Q1. The SMD codes can be deceiving at times and so was the case here. A w1P is different from a W1p .
Replaced Q1 with the correct version and the supply returned to proper operation. OP reports that he replaced the Q1 in the others that had the same issue and they are all back to normal.
-Case Closed-
Toastveritas odium paritComment
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Re: iMAC G5 Power Supply API4PC46-290 REV.A pin 8 no voltage
Toasty,
Thanks again for all of your help.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
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Assuming... -
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