Ok so I am working on a 32" Craig LCD TV (cheap piece). Of course I cant find any info on it, but thats ok I have fixed a few TV's..lol. So a lightning storm blew the TV. Testing it, I found that only one AMS1117 regulator is getting Vin...So I jumped 5V to the next one in line and the TV works! This also makes it so all the regulators now have Vin....So my question is, I know this is not the proper fix, but will this be ok to run 5V straight to the regulator. I am not buying a board for this TV, because it is soooo not worth it. So just wanted a second opinion on if I should install a proper jumper wire for the 5V and call it good? Thanks!
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Re: Voltage regulator question!
If you can try to find out where the Vin pins are connected to, may be it is from the output of another regulator.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 -
Re: Voltage regulator question!
I checked everywhere I could(with no manual) and could not find the supply...very frustrating. Because the TV is cheap, the main board in the size of smart phone..lol. The tracers are very hard to see. I will continue to look, if you think the jumper idea is bad..Comment
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Re: Voltage regulator question!
Can I see the picture? Also point out which one is not getting the Vin, and the one that gets the Vin.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=24809Comment
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Re: Voltage regulator question!
The continuity feature on your multimeter is your friend in cases like this.Originally posted by XmouseX View Post--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
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Re: Voltage regulator question!
Her is the picAttached FilesComment
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Re: Voltage regulator question!
Yes I totally agree! I have used continuity tests to find that there is a break from the 5V input connector to the voltage regulators that ARE NOT getting power. Just can't find the open/break in the circuit...Comment
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Re: Voltage regulator question!
So all the one with white circle are the one that do not have Vin, but the red on is the one that is working? Also which one that you inject the 5V into the input pin?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=24809Comment
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Re: Voltage regulator question!
Yes that is correct. the one I injected was the lower left one(next to the SMD arrow). Also wanted note that the continuity test shows that Vin on that same regulator is grounded...Comment
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Re: Voltage regulator question!
well....I went ahead and jumped it. The TV has been working for about 30 minutes no smell or noises. all the inputs work. I will let yall know how it goes
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Re: Voltage regulator question!
You will probably find it uses more power in standby, but not enough to be too concerned about.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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