Thread: low voltage psu
View Single Post
  #4   Report Post  
Sam Goldwasser
 
Posts: n/a
Default

"yhan" writes:

can u pls help me point out the trouble in the atx psu i am trying to
repair. it powers up but its voltage is lower than its specifications.
yellow wires- (only +7.5 volts, should be +12v, red wires - only 2
volts, should be +5 v). what could be the problem and where do i start?


Under what conditions? In the PC or on the bench? Does it have a load?
Is the 115/230 VAC switch set correctly? Did the problem happen on its
own or did someone just give you the power supply? Etc.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header above is
ignored unless my full name is included in the subject line. Or, you can
contact me via the Feedback Form in the FAQs.