can the receiver burn the lnb?

[kostis]

hi, i got a sat dish with a twin lnb the one wire goes to my house and the other on my neighbor house. in the last 3 year the lnb broke 3 times and i dont think this is normal. today the lnb broke after a small electric power cut that happen for another reason. after that we got no signal. so any ideas why is this happening?

[kalpikos]

Re: can the receiver burn the lnb?

Hi mate

Propably this is happening because you are using dual lnb.
The dual lnb uses a internal switch inside the lnb.
A malfunction in this swich when the power came back can results an electrical short.
May be you should start thinking about a ups.

[kostis]

Re: can the receiver burn the lnb?

A ups for a 10euros lnb is not worth it. if i don't find other solution i will go for another dish (50-60 euros). maybe i tell my friend next time that the power is off to remove the wire from the receiver. will this help?

[gianni253]

Re: can the receiver burn the lnb?

I suspect a grounding problem.
If the two receivers are plugged behind to different electricity meters their grounds could be at different voltages but these grounds are shorted at LNB point (where the two cable shields arrive).
The LNB's damage at the same time of power cut is a strong clue.
If receivers are connected to different electric networks I am afraid that new failures could happen again.

[kostis]

Re: can the receiver burn the lnb?

in case we are home at the time of the power cut will it help if remove the plug from the receiver (power and wire)? so when the power come on again it will no hit the lnb right?

[pat3]

Re: can the receiver burn the lnb?

Try a diseqc switch ...

[ProgSkEEtO]

Re: can the receiver burn the lnb?

Yeah i'm using a DiSeCq switch too, you should try this, but i think it's not possible for a reciever to burn a lnb.

[kalpikos]

Re: can the receiver burn the lnb?

in case we are home at the time of the power cut will it help if remove the plug from the receiver (power and wire)? so when the power come on again it will no hit the lnb right?

Yes, you are thinking right

I always when I'm at home and a power cut happens, I immediately unplug my box. This can protect you when the power came back.

The ups that I suggested above, is not only to protect your lnb, but can protect your box and even your tv set.

[gianni253]

Re: can the receiver burn the lnb?

in case we are home at the time of the power cut will it help if remove the plug from the receiver (power and wire)? so when the power come on again it will no hit the lnb right?

Yes, it could be useful to protect from extra tensions and spikes during thunderstorms and black-outs but not to protect from currents generated by different ground potentials.

[kudok]

Re: can the receiver burn the lnb?

as here already mentioned and often a reason is a wrong ( defect ) voltage - output,
electromagnetic induction or a wrong electrial potential

[Mobley3]

Re: can the receiver burn the lnb?

Surges on the mains can cause all sorts of problems, you should be using a surge protected mains block on your equipment and so should your neighbour, these are not that expensive and can save the Receiver and also your Television from disaster. If you suffer regular power outages then a UPS would be a very good investment, also unplug the receiver when this happens and also overnight.

regards Mobley3

[icekillah]

Re: can the receiver burn the lnb?

don't they make mounts for 2 single lnbs? if your neighbors receiver is burning out the dual lnb have him get his own single lnb he breaks he buys

[Momba0]

Re: can the receiver burn the lnb?

Surges on the mains can cause all sorts of problems, you should be using a surge protected mains block on your equipment and so should your neighbour, these are not that expensive and can save the Receiver and also your Television from disaster. If you suffer regular power outages then a UPS would be a very good investment, also unplug the receiver when this happens and also overnight.

regards Mobley3

I agree with the serge protection because they have helped a great deal here with a lot of power outages and spikes with the power return.
Sollatek are not all that expensive and are good because of the delay you can set following the power up.
Also, you might want to check the grounding on you cables between the lnb and your receivers.

[gianni253]

Re: can the receiver burn the lnb?

don't they make mounts for 2 single lnbs? if your neighbors receiver is burning out the dual lnb have him get his own single lnb he breaks he buys

Two lnbs are good for multifeed purposes, but if you need more outputs for the same satellite, focus is only one and a twin/quad lnb is requested

[dessertrat]

Re: can the receiver burn the lnb?

Most common cause is a short or spark when LNB cable is connected with the receiver powered on.