Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Power Supplies and Power Supply Design
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 06-14-2019, 08:59 PM   #1
spintop
Senior Member
 
Join Date: Feb 2011
Posts: 103
Default Help needed identify Diode - PSU FSP Hexa 500W

Hi All

Need help to identify a shorted diode on PSU Hexa 500W.
Don't know what rating to replace with.

Shorted diode is D24.
D24 is located just under the long heat sink (indicated by arrow).
there is a familiar looking diode at D25
Main Fuse is also blown.

Any help is appreciated. Thanks
Attached Images
File Type: jpg thumbnail_IMG_20190615_101651.jpg (201.0 KB, 20 views)
File Type: jpg thumbnail_IMG_20190615_104151.jpg (345.1 KB, 17 views)
File Type: jpg 105345.jpg (234.4 KB, 20 views)
spintop is offline   Reply With Quote
Old 06-14-2019, 09:27 PM   #2
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 37,869
Default Re: Help needed identify Diode - PSU FSP Hexa 500W

https://www.badcaps.net/forum/attach...7&d=1560567083
Did you remove it and test it off the board? It is connected in parallel with the resistor R84 (I cannot cleary see the print on the body, but more likely to be a 10 Ohms resistor).
BTW, that diode/resistor network is for Gate discharge which is connected to Gate of the MOSFET, you should check and see if the MOSFET is OK or not.
Since the main fuse is blown, you need to check all the power semiconductor devices for shorts.
__________________
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809

Last edited by budm; 06-14-2019 at 10:22 PM..
budm is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2020
Powered by vBulletin ®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:32 AM.
Did you find this forum helpful?