Laser phosphor & UST diagnostics, driver boards & optics service

Temperature error / shuts down after 1–5 minutes

Often caused by blocked ducts, failed fan zones (laser, DMD, PSU), or a drifting fan controller mis‑reporting RPM. Laser engines are sensitive to airflow balance.

• Audit of all fan rails and tach feedback
• Controller IC inspection & replacement where required
• Duct/shroud reinstatement and dust clearance

Dim/uneven brightness or strong colour cast

Degraded phosphor wheel, optics contamination, or driver ripple can reduce luminous flux or skew colour balance.

• Phosphor assembly clean, re‑grease and alignment
• Optics re‑seal to prevent dust re‑ingress
• Driver ripple and current stability tests

No image / stuck in standby

Laser driver/PSU fault, interlock switch issue, or firmware hang. Requires safe‑handling diagnostics — do not defeat interlocks.

• Laser PSU and driver board component‑level repair
• Interlock and sensor verification
• Firmware/service‑menu diagnostics where supported

UST focus drift & geometry issues

UST units (CinemaX series) are highly sensitive to surface flatness, shock and dust. Many focus complaints trace to screen/wall variances rather than the engine.

• Re‑shim mounts and adjust optical track
• Advise on ALR screen selection and wall prep
• Re‑collimation and geometry calibration

1) Temperature warning but vents look clear

1. Power off and let cool for 10 minutes; remove any ceiling‑mount obstructions.
2. Check all fans at start‑up (laser, DMD, PSU zones) — a silent zone indicates controller or fan failure.
3. Vacuum dust around intakes/exhausts; avoid compressed air into optics.
4. Ensure the projector isn’t in a confined recess; allow side/back clearance.

If the warning returns within minutes, stop using the unit — repeated thermal cycling can damage optics and driver boards.

2) Very dim image / green or yellow cast

1. Disable Eco/Dynamic modes to test baseline output.
2. Display a white screen; look for uneven tint indicating phosphor wear.
3. Check for rippling brightness (driver ripple); test a different mains circuit.
4. If dimness persists, phosphor assembly service or driver repair is likely required.

3) No image, status LEDs active

1. Confirm sources and cables; try a short HDMI 2.0 cable.
2. Perform a safe power cycle: unplug 10 minutes, then retry.
3. Do not bypass interlocks to inspect internals — high‑intensity light hazard.
4. Book diagnostics for laser PSU/driver evaluation.

4) UST focus drift / edge softness

1. Test on a rigid, perfectly flat surface (ALR UST screen preferred).
2. Level and square the chassis; small changes dramatically affect geometry.
3. Remove dust on the optical track and mirror; avoid harsh cleaners.
4. If drift returns, request an internal optics service and re‑collimation.