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Where is the fuse for power supply lightning strike possible

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  • Sanyo Master
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Posted on May 01, 2010

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When and How Should a Surge Protector Be Used on a Fixed Switch?


Common Causes of Lightning Strikes
  • Outdoor network cables or power cables are routed overhead.
  • A switch is deployed outdoors but is not properly grounded.

Damages of Lightning Strikes
  • If power cables of a switch are routed overhead in an outdoor environment, lightning strikes may burn the power supplies.
  • If network cables of a switch are routed overhead in an outdoor environment, lightning strikes may burn interfaces of the switch.
When a switch undergoes lightning strikes, overvoltage is induced by lightning on network cables and transmitted to interior of the chassis. The surge protection measures, such as lightning rod and chassis grounding cannot prevent the damage. Therefore, surge protectors or surge protection circuits are recommended.

Surge Protector Use Precautions Take the following precautions to protect a switch from lightning:
  • Ensure that the ground cable is connected to a ground bar or a ground point on the cabinet.
  • Avoid routing cables overhead in an outdoor environment. Bury cables underground or route them in steel tubes.
  • To protect network interfaces against lightning, use 8-line surge protectors (or Huawei certified 4-line surge protectors).
  • When installing a network interface surge protector, connect the IN end to terminals and the OUT end to network interfaces of the switch.
If a fixed switch is installed in a network box, follow these instructions:
  • Connect the ground cables of the switch and surge protectors to the ground bar in the network box.
  • The maximum length of a ground cable cannot exceed 40 cm, and a length of smaller than 15 cm is recommended.
  • If the network box is located outdoors and power cables are routed aerially over a long distance (more than 300 m) to the network box, it is recommended that you install a power supply surge protector in the network box. The decoupled power cable must be at least 3 m long
S2300 Switch Thunder link com

Dec 08, 2016 | Office Equipment & Supplies

2 Answers

Will a nearby lightning strike cause a power board failure?


It could happen yes it would depend where the strike entered the TV. Not all lighting strikes hit on the electrical lines, on a TV they can come through the cable, as well as a antenna if you have one hooked up.

May 10, 2014 | Samsung UN32EH4003F

3 Answers

Lightning strike, power was out for no longer than a second and came back on - only TV has been effected and will not respond by remote or tv button. Shows it is on. But only getting fast clicking noise...


Hi Johnson,

Only 50% chance that the symptoms was caused by a lightning strike because your cable box was powering on fine. Most of the cases when lightning strike near to your area, possible of multiple damaged to the electronic device not only to one particular appliances, most especially if they are plugged into the outlet. Also, fuse will blew because of excessive voltage.

I've suspected that the symptoms was only a co-incidence of lightning strike. If you can hear the clicking of the relay, this is only means that the standby power supply is working fine. However, this board has multiple output voltage feeding the other boards to function well. This kind of symptoms is a power supply related problem.

If you have necessary tools and test instrument and handy with electronics, you can troubleshoot this board to find the faulty parts like open fusible resistors, shorted transistors/IC's, leaky electrolytic capacitor, etc.
Another option is to replace the entire power supply board, this is more convenient if you are going to DIY because no soldering required. Try to find you board HERE. Type the model no. of your unit to the search engine, available parts/board will be display.

Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Jul 31, 2011 | Vizio 42 in. LCD TV

1 Answer

We had a lightning strike close by and now the TV will not turn on. Is it possible that there is a fuse that is blown?


Hello
It can't predict what may have wrong with your TV; becuse the lightning stroke will have trillions of volts when it strike the earth. Even its near presence will spoil the power supply section of any equipements. There is surely a fuse inside it, and you can check after opening the TV. Check it first. If it is burned, make a visual check inside the components of the TV for a burned damaged if any. If you find any of it, please do not put an other fuse and make an experiment with the TV. it may cause more components to be damaged. If no visual burned componets are seen, just put a fuse of same ratings [ratings will be either printed on its rims or indicated by colour bands across it]. If the replaced fuse again gets burned as the set is switched ON, make sure that some components in the power supply is shorted, and a through checkup should be done. Contact any experienced service technician to do the work. OK.

Jun 21, 2011 | RCA L40FHD41 40. in HDTV

2 Answers

Bad storm, lightening strike outside then TV went off and will not come back on.


I would start with your power supply. If you took a surge it is possible that you only blew a fuse. If it is a blown fuse, make sure you only use the same type fuse.

Apr 12, 2011 | Westinghouse SK-32H240S Television

1 Answer

We took a lightning strike and my RCA 20f510td has no indication of power. Is there a fuse that needs to be replaced?


Hello
The faults occurs during lightning strike is not predictable. At present, the power supply inverter section of your RCA ahs damaged. A thorough chekup must be done to detect whether there is any other faults also occured or not during this time. OK.

Apr 10, 2011 | RCA 20F510TD 20 in. TV/DVD Combo

1 Answer

Lightning strike, blows internal fuse (6.3v 125/250) on plug in.


sounds like the lightning strike took out at least the power supply if not more. sorry to be bearer of bad news.

Oct 31, 2010 | Toshiba 24AF41 24" TV

1 Answer

Power surge due to lightning strike today. Comp...


Unplug it and then blow a hairdryer at the power supply for 3 minutes. Leave the lid on, just blow the hairdryer at it from the outside. Craziest trick I ever saw.

After that, turn off hibernation. And eventually, replace your power supply.

May 20, 2010 | HP Compaq Presario SR1300NX (PP195AA) PC...

1 Answer

Model TDC2075A Sansui Had lightning storm, lost power no close lightning strike. TV will not power up, don't know if it has internal protection or is power supply went out


you mite try replacing the ac fuse 1 time-if it blows again there is a short in the power supply-i would then check rectifiers in the primary of the power supply-then check the fet-if any of them are shorted replace them

Sep 04, 2009 | Sansui CDVD1900 19" TV/DVD Combo

1 Answer

Won't power on after local lightning strike


with a lightning strick any thing can go. check diodes, dc fuse regulator and while U are at it check the horzontal output transistor

Dec 09, 2006 | Sanyo DS32830H 32" TV

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