28e Reception problem, dish alignment spot on.

compufunk

Regular Member
My Satellite Setup
DM 600-S, VU+ Duo,
Moteck SG2100, Fracarro Penta 85 dish, LG LH3000 42" TV + some computers
My Location
NW, Ireland
Hello All :)

I was hoping you could give me a little advise.

Someone asked me to have a look at their satellite kit. I've waisted two hours messing around with it and got almost nowhere.

We had a bad storm here on Thursday, so when I got the call I though it would be a simple alignment problem.

When I arrived the dish was a little out, so I realigned and tightened everything up, thinking, great that was easy.

Turns out its not that simple. Reception is still poor. I double checked alignment, then triple checked, then a few times more.

The alignment is spot on as far as I can tell using my signal meter.

Could this be a problem with the LNB? I didnt have a spare to had for testing. The cabling, connections etc are all fine as far as I can tell.

There was some lightning along with the storm. I'm wondering if this could have damaged the LNB. Are LNB's sensitive to lightning damage? There was no direct hit and no reports of any damage to other electrical items.

Setup is as follows.
Zone2 minidish with quad output LNB feeding two SD Bush Freesat recievers. Both boxes are having the same problem, so I'd suspect a Dish or LNB problem. I wouldnt expect both cables/connections to have failed at the same time.

Regards,
C

Just to add. I couldnt find any signal guide in the menu on the Bush receiver so cant report any levels. All I can say is that some channels are fine, others are freezing whilst some wont tune at all. BBC NI for example. Occasionally some sound will get through, but thats about it.
 
compufunk said:
Are LNB's sensitive to lightning damage?
I've changed quite a few lightning damaged LNBs. They either just don't work, or only work on some outputs.
 
Huevos said:
or only work on some outputs.

Exactly, had one only yesterday. Picture break up on one port.


Worth trying another LNb to see Compufunk.
 
hello,
i have seen lnb's get damaged from lightning as well.
there are several transistors that are final amps and is one shorts it will still flow signal but at a reduced level
weeker channels are bad stronger are ok.
it costs about 5 euro for a new lnb.
i would say swap it it couldn't hurt
ralph
 
Look on ebay mate for a Sky LNB. There are usually a few hardup engineers who will get shut of some of their stock for peanuts on there :D

Strange thing is i seem to know most of them :-lol
 
Thanks all :) Good advice as usual.

I went back there a while ago armed with a replacement LNB. The replacement did the job.

Rgds,
C
 
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