dm500s only getting horizontal channels?

amrhady

Hi All,

I can't receive vertical polarization channels with my dm500s, I have tried several images but nothing works - only horizontal channels.
I have another receiver that works for both polarization so I think it's not LNB problem.

Can anyone help?

p.s. the power supply that came with the box (12v 2A) died and replaced it with a (12v 3A) -can this be the problem?

many thanks.

gandalfthegrey

hi amrhady...
Do you have both recievers feeding from a single cable into a splitter? I had this problem a while back where I had my 500s and a Humax reciever feeding both thru a splitter with the exact same results and when I directly connected the 500s the problem stopped..
cheers.
gandalf

amrhady

Hi gandalf,

I'm only connecting the dreambox - I'm just saying that If I connect my old receiver it works with no problem so the LNB is ok.

ksiddiqi

i had a similar problem, only horizontal channels until i replace the splitter and it got fixed.

amrhady

Hello ksiddiqi,

What splitter exactly? I'm not sure i'm following?

In my setup I've the cable from LNB going directly into the box.

Myhd

High/Low voltage switching problem ?
read further on forum thread "22khz-tone-circuit-board-fix"

gandalfthegrey

Hi amrhady...
The splitter confusion was my fault!!..I assumed when you mentioned you had two boxes that they were connected from a single cable thru a splitter..
cheers..
gandalf

amrhady

Myhd, I checked the thread you mentioned it's useful but a different problem. I think it solves the "no-highband" channels, or low lnb voltage, problem.

My problem actually is constant high LNB voltage (18v)

Thanks.

HB13DISH

Did you have this problem with the old power supply or it appeared only when you changed to a new PS?

amrhady

not sure -I noticed by chance when I was looking for a certain channel.

amrhady

I found a workaround, FINALLY!!!! -

I have noticed that if I change the sat-configuration of H/V (18,14,0) to OFF I would get no signal, but with 14 or 18 I only get horizontal channels. This means that my dm500 output can either be ZERO or 18v (no 14v output).

So I did the following
1. Entered my old receiver into the loop and set it to a vertical channel (output of recvr to input of dm500)
2. LNB cable to input of old recvr
3. on the dm500, made 2 configurations for the same satellite one with H/V =18v and another with H/V= OFF
4. Edit transponders: Vertical transponders to one with H/V =0 and Horizontal ones to satellite with H/V =18v
5. Scan !

This way when I turn into a Vertical channel on my dm500 the box will put ZERO V on the cable, yet my old receiver will be putting 13v. And when I switch to a horizontal channel the dm500 will put the 18v as my sat configuration says.

A temporary workaround till I fix my box


thanks a lot to all who replied