View previous topic :: View next topic |
Author |
Message |
joby201
Joined: 21 Sep 2009 Posts: 5
|
Posted: Sun Oct 18, 2009 3:14 pm Post subject: 5v rail is measuring around 11v |
|
|
which component failure would cause this to happen? any help would be appreciated.
thanks, ty |
|
Back to top |
|
|
torbjorn
Joined: 07 Jun 2007 Posts: 370 Location: Sweden
|
Posted: Mon Oct 19, 2009 2:51 pm Post subject: |
|
|
That depends on which kind of equipment it is and how the +5V rail is supplied.
Typically, a such fault could be due to a short circuited series pass transistor of a linear voltage regulator or buck type switched regulator. Or it could be due to a voltage regulation problem or lost ground reference for any type of regulator.
Another possibility is a short circuit from the +5V to a higher voltage somewhere in the equipment. |
|
Back to top |
|
|
joby201
Joined: 21 Sep 2009 Posts: 5
|
Posted: Tue Oct 20, 2009 3:01 am Post subject: |
|
|
based on the possibilties you gave me, i think its a shorted transistor. does that sound accurate for a power supply for a plasma tv? unfortunately, i jumped headfirst into this and forgot some basics. by shorting whatever i did, i multiplied my problems. now i have, at the very least, several fuses to replace and at worst fried some ics. thanks for the reply |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
ipb080n06ng ipp080n06ng rev1.05 Infineon • KRC28 Kenwood • 99t2 LG • te3.1e-pt190r-sema Philips • tx p42u10be panasonic • compal la-7912p r0.3 schematics acer • hfe avr-1700 service DENON • CT-M486MK2 teac • power-inverter dps-279 37-42coll lcd Phi • Aspire 5110 5100 3100 & travelmate 5510 •
|