FAQ
TL;DR: NC+ decoder losing signal every 12 hours? "The 12h is interesting ..." Start with installation checks, then share your ADB model from the sticker to guide targeted fixes. [Elektroda, sosarek, post #18098053]
Why it matters: This FAQ helps NC+ ADB owners diagnose and fix recurring "No signal" and "only TVP Polonia" issues quickly.
Quick Facts
- Symptom pattern: signal drops every 12h; only TVP Polonia remains visible. [Elektroda, Bart.x, post #18098015]
- First step: inspect cables, LNB (converter), and F‑plugs before opening the decoder. [Elektroda, sosarek, post #18098030]
- Dried electrolytics may not bulge; measuring or replacing them “blindly” costs a few zł. [Elektroda, sosarek, post #18098120]
- Power-cycle reset restores channels until the next morning, a time‑dependent fault clue. [Elektroda, Bart.x, post #18098059]
- DVB‑S LNB control: 13 V/18 V select polarization; 22 kHz tone selects band. [“Low-noise block downconverter”]
How do I fix NC+ “No signal” that repeats every 12 hours?
Check cabling, LNB, and plugs. If installation passes, focus on the decoder power supply. Electrolytic capacitors can dry out without bulging. Measure capacitance/ESR or replace suspect caps. As one expert noted, “most common cause of faults” in these decoders is bad capacitors. This simple parts swap often restores stability. [Elektroda, sosarek, post #18098120]
What should I check in the satellite installation first?
Verify F‑connectors for tightness and no shorts. Inspect the LNB and its weather boots for moisture. Follow the coax for bends, damage, or water ingress, and confirm the dish hasn’t shifted. These basics save time before opening the decoder. [Elektroda, sosarek, post #18098030]
Only TVP Polonia works—what does that indicate about my setup?
Your decoder may power the LNB but fail to switch polarization or band. DVB‑S uses 13 V/18 V to select polarization and a 22 kHz tone to select band. If switching is missing, only channels on one combination remain. [“Low-noise block downconverter”]
Do capacitors need to look swollen to be bad?
No. “They don’t have to be” swollen to fail. Electrolytic capacitors can dry out and lose capacity quietly. Measure capacitance/ESR or replace them to rule this out. Visual inspection alone misses many failures. [Elektroda, sosarek, post #18098120]
Where do I find the ADB model and why does it matter?
Read the exact model from the rear/bottom sticker and share it. Helpers ask for it because model‑specific parts and known fixes differ, speeding diagnosis. [Elektroda, sosarek, post #18098091]
I reset the decoder and it works until morning—what next?
A time‑dependent return of the fault suggests borderline power components. Replace the electrolytic capacitors in the power section even if they look fine. This addresses thermal and aging drift. [Elektroda, sosarek, post #18098120]
Can swapping the external power supply diagnose the issue?
Yes. Try a second power supply with the same parameters and observe if the behavior changes. It’s a quick isolation step before internal repairs. [Elektroda, Bart.x, post #18098118]
Which capacitors should I replace first?
Start with electrolytic capacitors in the decoder’s power supply section. If you lack an ESR meter, “measure the capacity or change them blindly” using quality low‑ESR replacements of equal capacitance and adequate voltage. [Elektroda, sosarek, post #18098120]
How do I replace capacitors safely? (3‑step How‑To)
- Unplug the decoder and wait; discharge the PSU capacitors safely.
- Note polarity and values; replace with low‑ESR parts of same µF and equal/higher voltage.
- Inspect solder joints, reassemble, and test signal on multiple channels. [Elektroda, sosarek, post #18098120]
Do I need special tools to diagnose this?
A multimeter is enough to start; check diodes and basics, and compare behavior with another compatible power supply. If measurements are inconclusive, replacing suspect capacitors is inexpensive. [Elektroda, Bart.x, post #18098118]
What if my LNB and cable are new and I still get ‘No signal’?
If you’ve refreshed LNB and coax and the fault persists, prioritize the decoder internals. Replace or measure electrolytic capacitors, since they’re a frequent failure point in these units. [Elektroda, sosarek, post #18098120]
Where can I read similar repair threads for this ADB/NC+ box?
Follow the linked topics suggested in the discussion; they outline proven parts to replace and recurring faults for these models. “It is clearly stated what to mention.” [Elektroda, sosarek, post #18098109]
