Periodic 775 error on commercial setup.

Discussion in 'DIRECTV Installation/MDU Discussion' started by cblgod1, Dec 1, 2017.

  1. Dec 1, 2017 #1 of 10
    cblgod1

    cblgod1 New Member

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    Dec 1, 2017
    Hello all,
    I am at wit's end trying to figure this out. Here's what's happening, any info would be very much appreciated! To start let me say this, I have checked all the gimme's (ie. f-conns, cable, power supplies, swapped boxes, etc.).
    System
    KA/KU5
    65' Solid Copper Perfect Vision Cable
    DTV6PWRPOL-02 w/ Power Supply
    2' Solid Copper Perfect Vision Cable
    SDMSD606---2' Solid Copper Perfect Vision Cable---SWM16 w/ 29v Power Supply
    -
    -
    -
    2' Solid Copper Perfect Vision Cable
    SWM8 w/ 29v Power Supply
    2' Solid Copper Perfect Vision Cable from both SWM8 & SWM16
    each going to green label 8 way.
    I have 6 tuners on each 8 way with the longest run, to all H25s, at 60'
    I also have a deca attached to each 8 way.

    So the frustrating part is this...there intermittent 775 error happens at no set times, days, etc. as well as across the entire system. When I get these errors, it can be on 1 receiver, or multiple receivers across different 8 ways.
    I know that since it happens across the entire system, the cause has to be originate from something they all have in common! Knowing that I have replaced the following. (SWM8, SWM8 Power Supply, SWM16, SWM16 Power Supply, LNB, Polarity Locker, & Vertical Tap).
    Let me also add this, the 775 usually goes away as soon as I pull the power from the entire system (receivers not included). Any ideas where or what to try next?
     
  2. Dec 1, 2017 #2 of 10
    doctor j

    doctor j Hall Of Fame DBSTalk Club

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    Birmingham, Al.
    I can't answer your question directly but can sympathize with you.
    I have a commercial like setup in my home with a Sonora SDPI6Sx power inserter and a Sonora TAMP6R03 amplifier going to a pair of DSWM-30 multiswitches via a SDSWM-E1D splitter.
    Recently multiple times 775 errors have occurred with no obvious changes after working well for a while.
    Resetting switches seems to help but no single source correction

    Good luck
    Doctor j
     
  3. Dec 1, 2017 #3 of 10
    slice1900

    slice1900 Well-Known Member

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    Iowa
    I have a commercial system that's a bit more complex than that and while I've never had this problem, I've had a few problems I've had to track down so I might be able to help.

    You say you have a DECA attached to each 8 way? That means you have one connected to each of the 8 ways coming off your SWM16? The SWM16 bridges DECA between the SWM1 & SWM2 outputs, so you have a band stop filter between the SWM16 and one of the 8 ways (you could remove one and it would probably work OK, but if you have the third DECA you might as well use it)

    That's the only thing I see that might be wrong with that setup, though I don't see how it would cause the problems you describe. Do you have terminators on the unused SWM8 output and the unused 8 way splitter outputs? Is there a ground block between the LNB and polarity locker, and is the ground block properly bonded to the building ground? Which input on the SWM16 and the SWM8 do you have the PI plugged into (i.e. are you avoiding passing the signal through the PI)

    When you see 775 errors I'd keep track of what receivers are effected, what they are connected to (i.e. which 8 way connected to which SWM8/SWM16 port) and what channel the affected receivers are on. If the affected receivers are all tuned to channels from the same polarity (i.e. 103 odd or 99 even or whatever) then that might provide a clue.
     
  4. satinstallerguy

    satinstallerguy Member

    128
    6
    Apr 21, 2013
    Cleveland
    You guys are using equip improperly...... That equip is supposed to be for D2 installs... You need a TAMP06 and a 6,9 or 12 db tap after your polarity locker and you have to adjust the slope compensation on the TAMP06 so the levels are in the green... and you have to have voltage terminators on the bottom of your last TAP..... It all depends on cable run lengths too.... If you need help shoot me a message....
     
  5. May 8, 2018 #5 of 10
    Marc35242

    Marc35242 New Member

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    May 8, 2018
    I'm having the periodic signal loss with a hotel setup as well. Doesn't seem to be a pattern to it, other than maybe exceeding available channels. System is in this order..
    SL5
    Ground
    DTV6PWRPOL-02
    TAMP_6RO3
    DTV7TAP12DB-02
    PV23404 x (6)
    DSWM-30 x (4)

    So, the eight legs are then swm split to 121 tuners. I inherited this trouble call the other day and swapped the lnb because odd/even tp were missing in some rooms, that worked (for a day) now same problem.

    How many h25-100 receivers can run on a dswm-30 leg?

    Any thoughts?
    Thanks

    IMG_20180506_142015.jpg IMG_20180506_142024.jpg
     
    Last edited: May 8, 2018
  6. May 8, 2018 #6 of 10
    slice1900

    slice1900 Well-Known Member

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    Feb 14, 2013
    Iowa
    A DSWM30 is definitely not going to support more than 30 tuners, so if you have four of them that would be 120 tuners. You say there are 121 tuners, so I'd guess that's your problem. Hopefully it is one leg with 16 tuners and the rest have 15, but you should probably make a careful check as there could be multiple legs with >15 tuners and others with 12 or 13...
     
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  7. May 8, 2018 #7 of 10
    Marc35242

    Marc35242 New Member

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    May 8, 2018
    Thanks for the reply. Sorry, I missed the swm-8 in my list that runs one line (see pic) and that was SERIOUSLY overheated.

    The receivers were showing 101- even only, 99- even only and 103- all tp. Channels missing/errors. So I swapped the lnb and all tp showed, channels back no errors - for one day.

    After reading through the dswm-30 literature, I'm confused.. when it's pre-genie or DVR, is it 13 or 15 tuners per leg? This setup is h25-100 in each location.

    I'm going to double check the legs today and make sure it's not unbalanced (12 on one and 18 on another ~ like you suggested).

    Thanks
     
  8. May 8, 2018 #8 of 10
    slice1900

    slice1900 Well-Known Member

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    Feb 14, 2013
    Iowa
    The whole 13/15/21 channel thing with the DSWM30 and reverse band LNB has everyone confused, Directv has never provided any clear guidelines on that. However, if you are missing odd transponders 101 & 99 it definitely isn't a SWM channel issue so I'd ignore that end of it.

    It sounds like you were seeing the missing odd transponders only in some rooms and NOT in all? I'd trace back the affected rooms to determine the DSWM30(s) they are on. If it is limited to only one DSWM30, then you know it is either that DSWM30, the 99/101 13v cable between the tap and that DSWM30, or that tap which is at fault. If it is more than one, presumably it is the last ones in the chain and then you know it is either the 99/101 13v cable feeding the tap that feeds the first problem DSWM30, or the tap itself.

    If you can narrow it down that much you only have to replace one cable, one tap, and maybe one DSWM30.
     
    Marc35242 likes this.
  9. May 8, 2018 #9 of 10
    Marc35242

    Marc35242 New Member

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    May 8, 2018
    So, the hotel originally told me 121 rooms, today they said 100 - lol. So I counted the lines in the ceiling and it's 101 total. The dealer called me and he said no more than 13 tuners per leg (if non genie or DVR). So he is shipping out another dswm-30 to replace the swm-8 and wants 10 tuners per leg, with one leg at 11 tuners - 101 total.

    Today, I found most legs running 11/12 and two legs running 14, I pulled the extra to bring all down to 10 and they have blocked those rooms from being rented until parts come in tomorrow. Power cycled the system and maintenance checked all rooms - they worked, we will see if any go out before tomorrow.

    So I'm going to check/replace the tap lines, dish and ground connectors, add the new dswm30, bring the 2-8 ways down to 8&4 ways, and go from there.

    My even/odd signals are 101/99-100, 99/96-98, 119/100-99, 103/96-86. Is this a signal splitting issue? I think the signal is strong enough to split 100x - am I wrong?

    Thanks again
     
  10. Marc35242

    Marc35242 New Member

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    May 8, 2018
    Also, the hotel owner was there today, he said the problems only happen when they are at Max capacity. If they are at 60% booked, no issues.
     

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