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transponder problem only on 103ca

Discussion in 'DIRECTV Installation/MDU Discussion' started by crew11, Dec 22, 2011.

  1. crew11

    crew11 New Member

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    Jan 3, 2007
    I am having problems with 103ca satellite only. I am receiving 74 0 71 0 68 0 72 0 73 0 73 0 for transponder 9 - 16 11 -24.

    All other satellite 103cb, 101, 110, etc are receiving signal on all transponders.

    I have narrowed it down to one particular cable but cannot find a problem with the cable. The cable is transmitting a signal when I disconnect it I lose every other transponder for 103cb. The cable is working but not sending a signal for the 103ca transponders.

    Any other troubleshooting steps?
     
  2. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Since the problem is on 103 ca, but not 103cb, "dollars to donuts" it's the LNB.
     
  3. P Smith

    P Smith Mr. FixAnything

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    I'm lost - what the difference in LNBF for 103ca vs 103cb ? Same freq but different sats ?
     
  4. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Different SAT, same slot, so same tune voltage to the switch, but a defective connection between LNB & switch.
     
  5. P Smith

    P Smith Mr. FixAnything

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    If 103ca is OK, then the voltage is OK for 103cb. Bad connection in the case would affect both - ca and cb. :confused:
     
  6. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    The "bad connection" is between the LNB and the internal side of the switch, and only on the left hand polarization.
     
  7. P Smith

    P Smith Mr. FixAnything

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    May be BBC [SUP-2400] is the culprit ?
     
  8. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Not that likely as the conversion is the same as the 103cb and 99c SATs.
    Not sure why you're even "fighting this".
    The odds are the greatest that it's a defective LNB assembly, with a extremely minor chance that there's a problem in the receiver.
     
  9. P Smith

    P Smith Mr. FixAnything

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    No fight, nope. Just can't get the whole picture by OP description and the suggestions.
     
  10. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    It's an "odd problem", but the logic really points to the LNB, as it's the most likely place that these two SATs are separated, before they get combined on the output of the switch to the receiver.

    The only other place that these two SATs could be separated would be in the receiver's signal screens and having one screen not tune correctly to the even TPs, while the other screens do.
     
  11. P Smith

    P Smith Mr. FixAnything

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    Let me bring some numbers.

    103(ca) is D12 on frequenses 19.89 GHz...20.17 GHz (tp9...24) what would become Ka-Hi L-Band 1650...2150 MHz (lower part of it, actually).
    Same L-Band as 103(s) SW-2 19.741 GHz...19.866 GHz (tp1..6) same Ka-Hi type from same LNBF [103W Ka].

    My suggestion about SUP-2400 was out of whack, for sure.
     
  12. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    They've moved the TPs around a bit, with the D12 spots now being on the 103s screen, so just reading frequencies may not give you the same readings as the setup screens do.
    It "used to be" Spaceway KA-hi were all spots, but now KA-lows have spots too, and are on another screen.
     
  13. P Smith

    P Smith Mr. FixAnything

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    I gave latest (current) disposition of the 103ca transponders as it in system tables.

    For the spot, 103W: 103cb is covering by D10 Ka-Lo tp1...14; 103s is SW-1 Ka-Hi tp1...6 and D10 Ka-Lo tp15...24.
     
  14. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Without swapping the LNB, I don't know.
    And if that didn't fix it, it would have to be in the receiver.
    "My gut" tells me it is/was the LNB, but :shrug:
     
  15. P Smith

    P Smith Mr. FixAnything

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    OP should provide more info: what antenna he has ? Is there any switches between the antenna and the box (what is it ?).
    His description of a result of removing a cable doesn't make a sense for me...

    Perhaps in his Ohio place those even tpns are not visible at all ? What zip you are ?
    Let ask some residents from same area for the 101ca reading.
     
  16. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Doesn't matter.
    There is a switch, and removing one of the coax, causes both 103 SATs to lose even/odd tps.
    Since these are "c" SATS, there aren't "that many" evens missing.

    Back to my dollars to donuts. :lol:
     
  17. P Smith

    P Smith Mr. FixAnything

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    If he can see odd and even tpns from 103s, then I don't see why 103ca not show even tpn. It's same band, same L-Band, same switching 13/18V scheme. Same cable is using for 103W, one input. Still puzzled.
     
  18. crew11

    crew11 New Member

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    Jan 3, 2007
    1) All HD DVR receive the same transponder issue. 79 0 72 0 etc

    2) when I switch the 103/110/119 cable slot the transponder issue swiches. 0 79 0 72

    3) It is the one cable traced back to the lnb with no issue. The cable in question has a good connection to the lnb since it is providing some signal. i.e. 103 cb 84 92 94 90 etc

    4) I have a slim line SL5 LNB no swm

    5) no swm installed

    Summary: all receivers display the same issue. moving cable changes responder issue

    1st possible solution: replace lnb

    Any specific lnb replacement to buy for the sls5 no swm lnb? for example: I don't want to buy the swm model since I don't use swm.
     
  19. crew11

    crew11 New Member

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    Jan 3, 2007
    another note: current dish/lnb is connected to a wb68 6x8

    If lnb, I want to verify which model would work with my current setup. I don't plan to switch to swm.
     
  20. RobertE

    RobertE New Member

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    wow :eek2: That is just plain silly.
     

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