Diagnose in the order light travels
Work backwards from the wall. A welcome sign gobo projector that looks wrong is usually telling you something specific: soft edges mean focus or angle, a dim image means ambient light or dirty optics, a colour cast means the filter or the gobo. Each symptom has three or four causes and only one of them is an expensive one.
- 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
Blur: focus, surface and lens
A soft image that appeared gradually is usually contamination, not optics failure. Dust on the internal lens or a film on the gobo scatters light and lowers contrast, which reads as blur. Clean in the order the light travels and re-check before ordering anything.
- 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
The image is too dim
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 20 W to 100 W is a visible but not dramatic change.
- Clean the outer window and lens
- Measure ambient light at the working hour
- Reduce the image width and re-check contrast
- Run a full duty cycle and log the housing temperature
Colour is wrong or the gobo looks damaged
If the whole image has shifted, suspect the filter; if only part has, suspect the gobo. Dichroic coatings are stable for years, but dyed glass browns under heat, and a welcome sign gobo projector running at the top of its range will age a cheap filter in a single season. Photograph the image against a white reference and compare it with the install photo.
- 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
Electrical and thermal symptoms
Check the supply before the fixture. A welcome sign gobo 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.
What to have ready before you call
Warranty claims go faster with evidence. Record the model, install date, daily run hours, throw distance and a photo of the fault. For a welcome sign gobo 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.
