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Thread: no power from receiver to lnb
11-01-2012 05:39 PM #7
thanks. i did check to make sure lnb option is set to on.
how do yu do the loop method?
i have no way to take picture and post. sorry. i did take the cover off and looked at the insides. there is no swelling or leaks of anything on the caps. can someone post what the power source for the LNB might look like and where i can order that particular part ? i think if i can see what i'm looking for then i can point out the part that may be bad with cover off the receiver. i do see some cylinder looking things, some plate looking things, and such but not sure what i'm looking for.
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11-01-2012 06:04 PM #8Pub Member / Supporter
If you open it up and know nothing... See if you can spot a HAM operator in you area that does know something... The power supplies are the easiest to troubleshoot/repair. HAM radio power supplies are usually well designed and quite stout.
11-02-2012 06:14 PM #9
HAM operator, huh? i did a google search on HAM operator but i wouldn't know what to do with this thing. thanks for the tip though.
i there someone who can guide me in the right direction on how to replace/repair this lnb power supply? can someone share on how to do the loop method..thanks and sorry, i am very new to this kind of stuff, not very tech savvy. i wish i could just buy new receiver but just don't have the $$.
11-02-2012 07:59 PM #10
Did you test the voltage on the SAT IN port? Is it outputting 18vdc on a horizontal transponder and 13vdc on a vertical (+/- 10%)?
The voltage regulator IC will look like this.
Do you have a voltage tester to check the DC voltage? If not, no use in going any further as you would not be able to determine if the IC is working or being fed the correct voltage.
Loop method would be to connect a working receiver to the LNB, tune both receivers to the same channel and connect the loop out of the working receiver to the Sat IN on the malfunctioning receiver (or use a splitter if no loop through).
If the malfunctioning receiver works when the working receiver is providing power to the LNB, then you know that your receiver is either not configured properly in the menus or has a failure preventing the unit to power the LNB.Satellite AV, LLC (Gold Sponsor)
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11-03-2012 11:24 AM #11
ok. checked the ic. there are two of them. the one closest to the chassis as i touched the fist prong, i guess the positive, it reads 0.00 dc ma. the middle one also 0.00 dc ma. the next one , i guess the negative reads -6.9 dc ma.
now the other ic which is right next to the other one, the positive prong reads 18 dc ma, the middle is 0.00 dc ma and the next one, reads -18 dc ma .
i should mentiion that when i first tested the first one, as i touched the positive prong it read really high, like way past 30's. then when i touched the negative prong smoke came out...hope i didn't fry the recievr. it still fucntioning, power on, and everything.
also, the radings were pretty much the same on both vertical and horizontal settings. i knew i was on vertical or horizontal settings by going to satelite settings and switching back and forth to v and h transponders.
so with this info, i guess one of the ic's is bad? but if one is good, then wouldn't receiver work if i hooked up the coax cable to the good side ?
what might my options be at this time to fix this issue? thanks again.
11-03-2012 11:29 AM #12