PSU Input Voltage

Toggle sidebar Toggle sidebar
S

speedbot

Commendable
Apr 13, 2016
2
0
1,510
Although I can find output tolerance information, I have not been able to find input (AC) tolerances for a PSU. My Asus tower PC (M32CD core i5) with a 350 W power supply will not turn on on the circuit I need to use which provides 117.8 V RMS. Completely dead. Total amps draw on this circuit is < 10 and Other computers and equipment run OK.

I don't know specifics of the PSU because it is not listed by Asus & if I open the box I void the warranty - only 3 months old. However, this Asus PC works fine on other circuits providing 120.5 V. Does that make sense?
 
Solution
bjornl


That is very odd. Most every USA PSU specifies 110-120. It should say right on the PSU what it needs. Other than voltage, have you tested that circuit?
Sort by date Sort by votes
bjornl

bjornl

Honorable
Mar 16, 2016
2,962
2
10,965


That is very odd. Most every USA PSU specifies 110-120. It should say right on the PSU what it needs. Other than voltage, have you tested that circuit?
 
Upvote 0 Downvote
Solution
T

thx1138v2

Splendid
Jun 18, 2011
2,172
97
22,040
I suspect there is something wrong with either the 117.8V circuit or some other piece of equipment attached to the circuit that is drawing power from it. You probably need to get an electrician to look at that circuit.

Under voltage can be just as bad for electronics as over voltage so it might be a good thing that the computer refuses to run.
 
Upvote 0 Downvote
B

bigpinkdragon286

Splendid
Oct 3, 2012
4,648
35
28,590
I second the suggestion to have the outlet looked at by an electrician. Most household equipment is rated in the range of ±10% either way. While it may not be ideal, I wouldn't expect a good ATX power supply to have issues until you're well below 110 volts. Household voltage in the US can swing both sides of 110 - 120 without being out of spec, so I suspect either you have a very picky power supply or something causing issue with your outlet.
 
Upvote 0 Downvote
S

speedbot

Commendable
Apr 13, 2016
2
0
1,510
Thanks everyone for your input. I picked the first responder as providing the answer but everyone said the same thing so it must be right <grin>. I also thought a +/- 10% range would be OK and it is weird that it only seems to affect this one computer, but I have called an electrician and will have the circuit checked tomorrow. I appreciate all the input.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom