Switches going out on a 300

[elote2005]

Has anyone had any issues with their 300 blowing switches? I'm replacing switches almost daily, I just put a brand new pansat premium, no signal....

Any suggestions? Thanks

[BanHammer]

You must be using crap switches if you have to replace them daily. It's either that or you're not unplugging your receiver before disconnecting the satellite cable.

[elote2005]

Thanks for the reply Ban.
Well, at this point Im using older switches, but Ive used an EMP, which are one of the best out there.
Also, I turn off the LNB power, then using the remote to off, then the back switch, then unplug the box, before I even go back up to disconnect. Ive been in the game since cards, but this is some weird sh*t!! It has to be my 300 at this point.

[Terryl]

What type of LNB's you using?

The receiver should not be able to supply enough DC voltage to wipe out a switch or switches, except when disconnecting them with the power on, a possible DC surge could pop a switch, but not if they are connected into the system.

However if the power supply in the reciver has a problem it could be supping too much AC voltage to the switch, this would FUBAR a switch in a few hours to days, test the voltage at the LNB input "F" connector with a DVM set to measure AC voltage, it should be under 100 mV AC, anything more then that and the power supply is in question.

Another possibility is a ground loop problem, one too many grounds at a distance from each other, or no ground at all.

[swanner]

I'm gonna guess bad ground or no ground at all, also, is the switch in a really wet environment ?....
Totally unplug your receiver when changing out switch's.. I had to learn the hard way myself

good luck....

check those grounds..

[elote2005]

Yep, it was the ground.

Thanks Guys!!

[swanner]

glad to hear it, all is working well now???

[dishuser]

I'm gonna guess bad ground or no ground at all, also, is the switch in a really wet environment ?....
Totally unplug your receiver when changing out switch's.. I had to learn the hard way myself

good luck....

check those grounds..read post #3