| Author |
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| van0014 |
 Posted: Thu Oct 10, 2013 4:48 am Post subject: |
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Turns out i blew a fuse. The fuse was covered in heat shrink.
The TV still works, but the backlight is really dim. I found out it had 22v, 800ma powering it at the time, so i wired 2 12v transformers in series, directly to the 48 SMD LED strip. It runs, but obviously it's not ideal. |
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| jts1957 |
| Posted: Wed Oct 09, 2013 1:07 pm Post subject: |
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| 'Twas nothing. |
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| van0014 |
| Posted: Wed Oct 09, 2013 11:17 am Post subject: |
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| thanks for the advice |
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| jts1957 |
| Posted: Tue Oct 08, 2013 1:24 pm Post subject: |
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| Toast. |
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| van0014 |
| Posted: Tue Oct 08, 2013 12:12 pm Post subject: 12v 19" LCD TV - Reverse voltage |
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After sucessfully running my TV from a 12v, 1.5A power supply, i decided to hook it up to a car battery. But i used a plug that wasn't labelled. I had a 50/50 chance i would get it right.
As soon as i hooked it up, there was a spark from the wire. I connected it the other way around, and it didn't work. So i thought maybe the spark was normal. I hooked it up in reverse again.
There is very little visible damage on the board, but i replaced a capacitor that was unusually expanded. That didn't fix it, but later i noticed some surface mount diodes that looked damaged.
With little visible damage, and reverse voltage, is it likely i have only blew a few diodes? The jump starter i used wasn't fully charged, and i couldn't start a car with it. I'm quite new to self repairing circuit boards. |
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