Badcaps.net Forum
Go Back   Badcaps Forums > Electronics Theory and Troubleshooting > Troubleshooting Computer Displays
Register FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 08-17-2012, 11:46 AM   #1
1supertech
Senior Member
 
1supertech's Avatar
 
Join Date: Apr 2012
City & State: Smyrna GA
My Country: USA
Line Voltage: 120
I'm a: Hobbyist Tech
Posts: 160
Default What is soldered to cap

What is soldered to this power supply cap is it a resistor or a diode,fuse it's connect from power supply source to main board just curious. Monitor is a Va720

Thanks
Attached Images
File Type: jpg IMG_8190 viewsonic1.jpg (1.93 MB, 37 views)
File Type: jpg IMG_8192 viewsonic 2.jpg (1.59 MB, 34 views)

Last edited by 1supertech; 08-17-2012 at 11:48 AM..
1supertech is offline   Reply With Quote
Old 08-17-2012, 11:54 AM   #2
budm
Badcaps Veteran
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 7,016
Default Re: What is soldered to cap

It looks like a Diode, is the non-band side connected to the RED wire B+ input? It is used to protect the circuits incase some hooks it up with wrong polarity applied to the Red/black power cables.
__________________
Never stop learning or per Greek Pro "when you will update your ID from Knowledge Seeker to a Pro (in 10 years) ,
then I will take you more seriously, for now you are just a kid playing with it keyboard"
Baisc 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
budm is offline   Reply With Quote
Old 08-17-2012, 12:02 PM   #3
selldoor
Slow Learner
 
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
Default Re: What is soldered to cap

I believe it is a 7A fusible resistor
selldoor is offline   Reply With Quote
Old 08-17-2012, 12:15 PM   #4
1supertech
Senior Member
 
1supertech's Avatar
 
Join Date: Apr 2012
City & State: Smyrna GA
My Country: USA
Line Voltage: 120
I'm a: Hobbyist Tech
Posts: 160
Default Re: What is soldered to cap

Thanks guy's
1supertech is offline   Reply With Quote
Old 08-17-2012, 12:18 PM   #5
budm
Badcaps Veteran
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 7,016
Default Re: What is soldered to cap

Put the meter in Diode mode and test it.
budm is offline   Reply With Quote
Old 08-17-2012, 02:37 PM   #6
selldoor
Slow Learner
 
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
Default Re: What is soldered to cap

Here is a chinese?/Japanese?/Korean? badcaps site

http://bbs.pigoo.com/thread-25035-1-1.html

It is regarding a VA720?? and mentions a fuse SG7A

I wonder who they blame for the bad cap production?

Perhaps a bit more plausible is this result of a search
"SG7A Fuse" I have looked at NTE site but no mention.
I guess obsolete - perhaps NTE over a co SG? singapore?

First line: sg7a SG2A JET SG3A ME 4946 Jet 2A 250v fuse Worldwide supplier high quality electronic components other circuit protection devices Polymeric Resettable Fuses Filled Surge Arresters Integrated Circuit Protectors Thermal Cut-Offs Metal Oxide Varistors Overvoltage Transient Suppressors SIDACS Thermal C Abstract: .. 74−5 SG7A 7.0A F−02. 74−5 FG8A 8.0A F−02. 74−5FG1 0A 10A F−02. * Not UL Approved. 4 NTE Electronics, Inc. Vo ice 973 748−5 089 FA X 973 748−6 224 http://www.nteinc.com. 5 x 20mm Miniat ure Ceramic .. Tags: Jet 2A 250v fuse ME 4946 JET SG3A SG2A sg7a datasheet abstract..

Last edited by selldoor; 08-17-2012 at 02:42 PM..
selldoor is offline   Reply With Quote
Old 08-17-2012, 02:49 PM   #7
budm
Badcaps Veteran
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 7,016
Default Re: What is soldered to cap

If that is 7A fuse, that is a lot of Amps for 17" monitor.
budm is offline   Reply With Quote
Old 08-17-2012, 02:52 PM   #8
tom66
Badcaps Veteran
 
Join Date: Apr 2011
City & State: University of Leeds (MEng ElecEng undergrad)
My Country: UK
Line Voltage: 230Vac 50Hz
I'm a: Student Tech
Posts: 13,621
Default Re: What is soldered to cap

7A may have been chosen to improve reliability; fuse could be carrying only about ~3.5A. Still a lot for a 17".
__________________
** Begin Signature **

I fix TVs and electronics as a hobby and to save nice things from the dump. 40 LCD TVs, 4 monitors, 13 plasma TVs, and a 6.1 system!

Free service manuals database: http://www.tgohome.com/ServiceManuals - Have a manual? Need a manual? Please PM me.

I have successfully fixed (from best --> worst build quality):
3 Panasonic Plasmas, 1 Yamaha HTS, 1 NEC Plasma, 2 Sharp LCDs, 2 Toshiba LCDs, 5 Philips Plasma/LCD, 1 Hitachi Plasma, 5 LG LCD/Plasma, 10 Samsung LCD/Plasma, 1 Thomson Plasma, 1 Atec LCD, 1 Hanspree LCD, 1 Xerox LCD, 1 Harwa LCD, 2 Proview LCD, 2 Hyundai LCD, 1 "Onn" LCD, 1 Dell LCD, 1 iiyama LCD, 1 Logik LCD, 5 Bush LCD, 10 Vestel LCDs

[Please do not PM me for help: I am a busy student, and we prefer input from all sides on this forum.]
tom66 is offline   Reply With Quote
Old 08-18-2012, 06:01 AM   #9
1supertech
Senior Member
 
1supertech's Avatar
 
Join Date: Apr 2012
City & State: Smyrna GA
My Country: USA
Line Voltage: 120
I'm a: Hobbyist Tech
Posts: 160
Default Re: What is soldered to cap

Recapped Va720 works great for an old monitor.
1supertech 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


All times are GMT -6. The time now is 09:30 AM.


Badcaps.net Technical Forums © 2003 - 2013
Powered by vBulletin ®
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.