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!
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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3+1 Voltage Regulator for IMVP-7/VR12 CPUs
Compliant with IMVP-7/VR12, the ISL95831 provides a complete solution for microprocessor and graphic processor
core power supply. It provides two Voltage Regulators (VRs) with three integrated gate drivers. The first VR can be
configured as 3-, 2- or 1-phase VR while the second output is 1- phase VR, providing maximum flexibility. The two VRs share the
serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with the two chip approach.
Based on Intersil's Robust Ripple Regulator...11-05-2024, 03:24 PM -
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11-05-2024, 07:38 AM -
Hello all. Excellent forum you have here - it has already been a great help to me. I am posting the details of my situation before I go and start buying parts to see what suggestions the great minds here may have on diagnostics or otherwise.
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