Start at the wall and work back to the lamp
Before assuming failure, establish what the unit did on day one. Most outdoor advertising logo projector complaints describe a gradual decline that nobody dated, which makes it impossible to tell a failing LED from a dirty lens. Take a photo, note the hour and the house lighting, and compare against the install record.
- What the surface looks like and how it is lit
- Whether the image is uniformly soft or soft at one edge
- When the fault started — overnight or gradually
- Whether anything on site changed at the same time
The image is soft or out of focus
Blur has three causes and only one needs a new part. First, focus drift — housings expand as they warm and short throws are more sensitive than long ones. Second, an off-axis mount, where one side of the image is genuinely further away than the other and no focus setting fixes both. Third, a surface that is not flat, which scatters the image at the edges.
- Refocus at the working hour on the actual surface
- Check the corners — soft corners mean an angled mount
- Confirm the surface is flat
- Inspect the lens and gobo for contamination
Dim: ambient light, output and dirty optics
Check the easy things in order: lens cleanliness, ambient light at the working hour, image size. Halving the image area doubles the brightness at the wall, which is free. Only after those should you consider a higher output model — and if you do, note that going from 100 W to 400 W is a visible but not dramatic change.
Colour and artwork faults
Most colour complaints turn out to be artwork, not hardware. A gobo engraved from a low-resolution file, or one where a gradient was converted to a coarse halftone, produces banding and muddy edges that look like a projector fault. Check the original file before ordering replacement optics.
- Compare against the install photograph
- Decide whether the whole image or part of it is affected
- Inspect the gobo against a light at an angle
- Check the original artwork file resolution
It cuts out, hums or trips
Check the supply before the fixture. an outdoor advertising logo projector on a long cable run, a shared circuit, or a supply with its protection sized for something else will misbehave in ways that look like product failure. Measure at the unit under load, not at the distribution board.
- Note when the fault occurs — at switch-on or after warm-up
- Measure the supply at the unit under load
- Check the housing temperature and ventilation
- Confirm the protective device is correctly sized
When to stop and call the manufacturer
Warranty claims go faster with evidence. Record the model, install date, daily run hours, throw distance and a photo of the fault. For an outdoor advertising logo projector the most useful single piece of information is whether the fault is gradual or sudden — gradual almost always means environment, sudden almost always means a component.
- Model and serial number
- Install date and daily run hours
- Throw distance and image width
- A photograph of the fault at the working hour
