Only getting Vertical polarization channels...

[theking01]

Hi!

I have lost many channels due to having bad or no signal and when I rescanned BEV91, It only scanned successfully half of the Transponders, all of them Vertical polarization. The ones that are on horizontal polarization had not been found. This is weird. Might it be an LNB problem?

[PremiereElite]

It could be LNB as well as a switch ,cable or shift of dish even bad weather

[Nostradamus]

it could be a LNB issue or a receiver issue. The receiver sends out one voltage for Horiz and changes voltage for a Vert. If the receiver stops making that switch then you are stuck with one polarity as well.

[theking01]

Ok thanks. It had been giving me intermittent picture for a couple of days or so on Horizontal polarity channels and now nothing. If it's the receiver, is it fried? Let's hope it's the LNB.

[Glatt]

My guess is the switch! Had that on a few installations!

[PremiereElite]

I would do the basic troubleshooting before buying a receiver,checking switch ,cables lnb etc..gl

[Terryl]

Hi!

I have lost many channels due to having bad or no signal and when I rescanned BEV91, It only scanned successfully half of the Transponders, all of them Vertical polarization. The ones that are on horizontal polarization had not been found. This is weird. Might it be an LNB problem?

What type(s) of LNB(s) are you using?

If you only have thew vertical transponders then the receiver is ether not sending the correct DC voltage for the H transponder (+18 volts DC), the switch (if you have one) is not switching correctly, or your system setting s have changed, or something has happen to your coax, if there is a DC short or bad connector, your +18 volts may not be high enough to switch to the "H" polarity's.

with linear, legacy or standard LNB's, +12.5 volts to +14 volts equals Vertical transponders, +17.5 to 19 volts equals vertical transponders on an old style legacy LNB or a standard LNB.

If you have the DP type LNB(s) then something has happened to your switch, or the LNB.

DP type LNB's use a higher frequency band to get the "H" transponders to the receiver, if you have the wrong settings for the DP type LNB's then you will be missing the "H" transponders.

Check your receiver settings, make sure they are correct for your LNB(s).

[hondoharry]

I've seen that a few times and it was never the LNB. Unless you see physical damage letting water in, the LNB is the last thing to check. I've even seen cracked ones with water getting inside still workng fine.

In some cases it was the receiver. Changing out a part on the power board fixed it. The receiver is easy to check. Remove the sat cable and stick a paper clip in the center of the connector on the receiver. With a voltage meter measure between the paper clip and ground to see if it changes when changing the receiver horizontal/verticle TP's. If it does, then the voltage is not getting to the LNB and is probably a bad cable/switch connection blocking the voltage. You can also test the cable voltages at the LNB end. If good voltage changes then it's the LNB.

[bkr™]

Good advice, usually 13vdc or less for vertical and 18vdc for horizontal.

[theking01]

Great advice and quick help guys. Will test it out in the next couple of days. Many thanks!