Coachman TV & Antenna
(2025 Model Year)
View official manual on manufacturer's site ↗Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Poor TV picture - freezing, pixellation, or no picture/sound at all | A weak signal - incorrect amplifier gain, the antenna not aligned with the transmitter, or the wrong polarity setting | Turn the amplifier gain fully up (rotate clockwise), point the antenna at the transmitter, and check its polarity (horizontal/vertical) is set correctly. Bypass the amplifier using Short Hook-Up Test 1 to narrow down where the fault lies, then retune the TV. | DIY Safe |
N/A | TV picture breaks up or freezes despite a strong signal | Signal overload - the amplifier gain is too high for a strong-signal area | Turn the amplifier gain down (rotate anti-clockwise) and point the antenna away from the transmitter. If that doesn't help, switch the amplifier off, turn the gain control back to maximum, then retune the TV. | DIY Safe |
N/A | TV amplifier's LED doesn't light up | No power reaching the unit, or incorrect polarity | Check there's power reaching the unit and that the polarity is correct. If that doesn't fix it, contact Grade UK Ltd. | DIY Check / Tech Fallback |
Frequently Asked Questions
Q: How do I set up and troubleshoot the TV aerial system?
Start by loosening off the mast's locking collar and winding the antenna up, work out whether the local signal is horizontal or vertical and position the dome accordingly, then switch the amplifier on (its LED should light) and wind the gain fully clockwise. Rotate the mast until you find the transmitter, retune the TV, then lock the mast collar back down by hand.
If reception is poor, work through the amplifier's own checks in order: confirm every coaxial connector is wired correctly and uses a decent-quality plug; check the coaxial cable isn't kinked, pinched, or coiled up (which can distort the picture); if the amplifier's LED won't light, check it has power and that the polarity is correct; and if a strong signal is causing picture break-up, wind the gain back down anticlockwise.
Two isolation tests can narrow down a fault further: connecting the TV straight to the amplifier (bypassing the rest of the wiring) tells you if the fault's in the cabling to the TV outlet, while connecting the TV straight to the antenna (bypassing the amplifier) tells you if the amplifier itself is at fault.