Philips 7072 satellite receiver

[melkboer]

Recently purchased a Philips 7072 digital satellite receiver/decoder. Using it with an Attisat (square) satellite dish. Signalstrength is good, have activated my subscription to CanalDigital and receive all channels.

Problem is that after a variable length of time, sometimes seconds, sometimes minutes, the picture dissappears and the receiver shuts itself down and then goes into standby mode.

Upon switching on the receiver, the same happens... channels are ok for some seconds or minutes and the receiver switches of again.

If I remove the RF/Coax cable, the receiver does not switch itself off.

Purchased the receiver in Holland, Purchased the satellite dish in Norway and am viewing in Norway.

Anyone have any suggestions as to why the receiver may be switching itself off ???

I didn't understand "RF/Coax cable" but, if you are disconnecting the LNB, you are reducing the load on the power supply. In which case the power supply probably contains faulty electrolytic capacitors. Satcure specialises in repair kits but I don't think I've seen one for Philips. However, the simplest action is to replace every electrolytic in the PSU with an equivalent low-ESR version of the same (or higher) rated voltage and capacitance.


Fman

[melkboer]

Thanks for the reply. I meant to say when I disconnect the antenna coax cable.

I have now found that the strange thing is that the receiver does not switch itself of when it is tuned to a radio channel. As soon as I switch to a TV channel and I get a picture on the TV, the receiver switches off again after a short while and goes to standby.

Does that still indicate that the powersupply may be faulty ?

I don't understand "antenna coax cable" as it has more than one meaning (eg. TV aerial cable, dish cable). If you mean that disconnecting the *LNB CABLE* cures the problem then this may be because it's reducing the load on the power supply. See my previous reply.

Changing polarisation from a horizontal to a vertical polarised channel (17 volts to 13 volts) will also reduce the load. If your radio channels happen to be on vertically polarised channels then that would explain the effect that you describe. Otherwise it makes no sense except as, possibly, a software problem (which could still be related to a faulty power supply). There is a very slight possibility that the LNB could be faulty.

My first move would be to get the power supply outputs checked for high-frequency ripple, which would suggest faulty capacitors if it's in excess of, say, 50 millivolts. Or simply measure the ESR of the electrolytics.

A slightly technical answer. If you don't understand it, show it to your local (qualified) repair man.

Fman