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Trouble Shooter

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February 2009
 
LNB Problem

Q.1 : I am having a problem with my satellite dish, specifically my LNB. What is a LNB and what can I do to trouble shoot it and or fix it? (Javed Qureshi, Karachi)

Ans: Unless yours is a special or non-mainstream brand, your LNB probably can't be repaired if it has failed. Replacement will be the most likely option. They aren't that expensive nowadays. LNB is the main part of the "satellite antenna" the part that gathers the signal and sends it downstream to your receiver.


Subscription Programme

Q.2 : I get a crackling sound from my TV every time I watch a subscription programme. What is wrong? (Bashir Khan, Peshawar)

Ans: First, check your cable connections. If you are satisfied with the connections, it could be your decoder module. Then update your receiver and search the channels again. You will get clear voice and picture.


C-band dish

Q.3 : I can't find my C-band dish manual. How can I determine its focal length? Please give me answer through Dish Channels. (Faqir Ahmed, Quetta)

Ans: Measure the diameter of your dish and convert this value to inches. Measure the depth of your dish in the middle by placing a flat board across the center of the dish and measuring from the board to the dish. Multiply the diameter of the dish by itself. Multiply the depth of your dish by 16. Divide the depth value into the diamter of your dish (the squared value that you calculated). This is your focal length.


Satellite system

Q.4 : When I searched the channels for first time, they were searched all. But now, I've lost every other channel on my satellite system. What is causing this? (Saleem Inam, via e-mail)

Ans: More than likely your servo motor has quit working. Check the servo motor wire connections at the satellite dish and at the receiver. When you change channels the receiver sends out 5 DVC on the red wire. There will be a constant 1/3 to 1/2 VDC on the white wire. Check those with your voltmeter. If you have the voltage, the receiver is fine and you have a bad servo. If you don't have the voltage then the receiver is the problem.


Feedhorn

Q.5 : I just aligned my dish put on a new LNB and feedhorn, and my picture is still sparkly. Is it my receiver problem? (Waqar Ahmad, Islamabad)

Ans: Not likely. There is a strong chance that a section of your buried cable is letting water into the coax. Are there any splices in your cable? If so, this would be your problem. Replacing your cable is recommended.


Programming receiver

Q.6 : My dish won't land on the satellite I want it to, and I have to reprogramme my receiver several times. What's wrong? (Hassan, Saudia Arabia)

Ans: Your dish mover has a small sensor located under the motor cover. This sensor communicates with your receiver about where it is in the satellite arc. These sensors wear out over time and occasionally will not land on your selected satellite. Determine your dish mover model and browse our on-line catalog under C-Band System Parts to find which sensor works with your dish mover.


Losing picture

Q.7 : I often lost my picture. What is the problem? My receiver is working well. I have installed eight feet fiber dish antenna. (Masood Hassan, Lahore)

Ans: Typically, when you lose every picture on every satellite it is the LNB. Test the voltage coming out of the receiver. The receiver sends 18-21 VDC out to the LNB to power it up. If you have this voltage present on the coax cable at the dish, the receiver and cable are fine and the LNB is bad.


Pay channels

Q.8 : I can't receive one of my pay channels on a satellite. It is the only channel I can't get. What do I do? (Rashid Alam, via e-mail)

Ans: First, call your programme provider and get a re-hit of programming. If this doesn't fix the problem, try pulling the decoder module out of the receiver and letting it sit out for an hour before reinstalling and testing. Third, try deleting that satellite from the receiver's memory and reprogram it in.


KU satellites

Q.9 : How do I programme in the KU satellites with my older receiver? The names are different and it won't take the new names. (Sabir Iqbal, Abbotabad)

Ans: Go to the satellite location and attempt to programme in a KU satellite using the parameters in your system that are closest to those of the actual satellite. All but a few KU satellites are part of a C/KU combo bird. Find the C-Band side first, then attempt to program in the KU side. Use whatever naming sequence you can remember since your system likely won't let you name satellites such as X4 or L5. It is tedious work since some of the new KU birds have 24 transponders that don't match what is preprogrammed in your receiver. The 4Dtv receivers automatically update these names as they occur.


Remote fixing

Q.10 : I have two of the same receivers in my house and the remote I have changes both at the same time. Can I fix it so only receiver changes instead of both? (Kamal Siddiqui, Hyderabad)

Ans: Some remotes can be 'addressed' to work with just one receiver even though you may have similar models of the same receiver in your home. Most remotes are made to just put the batteries in and they work. Check your manual for programming your remote; if it is addressable it should be covered there.


 

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