Laser Phosphor & RGB — Diagnosis, Drivers, Cooling & Colour
We restore brightness, stability and colour fidelity on Christie laser platforms. From phosphor wear and derating to RGB array balance and precision thermal work, our bench process brings units back to spec and documents every step for clarity and accountability.
Platforms we service — GS/HS, Crimson/Boxer, Griffyn/M 4K25 RGB
GS / HS (1DLP, laser phosphor): popular in corporate, higher education and houses of worship. Typical cases include laser derating, phosphor wheel contamination, drive faults and fan warnings. We restore output, stabilise colour and reduce acoustic load by addressing airflow and driver behaviour.
Crimson / Boxer (3DLP, high-brightness): robust platforms used in live events. We service laser PSUs, backplanes, network/control boards and cooling paths, and check alignment to protect the optical engine from thermal stress.
Griffyn / M 4K25 RGB (pure-laser): leading-edge RGB arrays with precise colour rendering. We address array balance, optical path cleanliness, convergence and firmware/telemetry issues that affect stability or safety interlocks.
Our experience spans touring rigs, museums, simulation suites and long‑duty fixed installs. We maintain spares, create model-specific test profiles and keep a library of engineering notes to shorten turnaround.
How laser phosphor and RGB differ — and why it matters in service
Laser phosphor uses blue diodes exciting a phosphor wheel to generate broader-spectrum light. Wear, contamination or bearing issues can reduce efficiency or introduce flicker and colour shift. We inspect wheel optics, bearings and seals, then verify driver current, diode temperature and interlocks.
RGB pure-laser employs separate red, green and blue diode banks or modules. Balance, temperature uniformity and optical alignment are critical; any drift shows as hue imbalance or speckle-like artefacts. We log per-channel telemetry, validate cooling and equalise output in software within OEM tolerances.
Both architectures depend on airflow integrity, stable power rails and dust control. Our process treats these as first-class concerns to avoid repeat faults and protect optics and electronics.
Safety is paramount. We follow manufacturer safety procedures around lockouts, covers and service patterns, and provide an engineering report that records all readings and adjustments for compliance and insurance.
Common symptoms — what they usually mean
Dim image / colour drift: diode derating, phosphor wear, optics haze, incorrect colour space, or thermal throttling. We confirm with light measurements, temperature telemetry and reference test signals.
Laser module error: driver or PSU rail fault, open interlock, over‑temp, or imbalance across diode strings. We scope rails, inspect connectors and verify sensor behaviour.
Fan/Filter warnings: clogged filters, failing blowers or tach feedback issues. We deep-clean ducts, replace fans where indicated and validate RPM against spec.
Start-up/shutdown anomalies: sequencing or firmware issues, protection trips, or backplane problems. We load test, capture logs and update firmware when appropriate.
Bench diagnostics — measured, repeatable, documented
Every unit receives an intake assessment: serial capture, hours/usage logs, error history and visual inspection. We photograph boards and cabling, record module revisions and look for non‑OEM modifications that could affect reliability.
We then run a structured test plan: rail stability with ripple measurements, driver command response, fan tach signals, temperature probes and optical output. Where access allows, we clean and reseat key harnesses and inspect for fretting or heat stress. The result is a clear picture of root causes rather than symptom chasing.
Findings are summarised in a written engineering report with recommended parts, labour estimate and risks. Approval triggers the repair phase with dependencies and lead times made explicit.
Repair workflow — from intake to calibrated sign‑off
1) Intake & safety: inspection, lockout, ESD safeguards and documentation. We confirm firmware level and config, and photograph the unit pre‑service.
2) Disassembly & cleaning: careful access to laser driver bays, phosphor assemblies and cooling tunnels. Dust control is critical to protect optics and sensors.
3) Component repair/replace: laser drivers/PSUs, phosphor wheels, bearings, fans/blowers, sensors and cabling. We use OEM parts or proven equivalents and record serials for traceability.
4) Reassembly & validation: we validate rails, temperatures and optics, then run extended tests at ambient to catch intermittent behaviour.
5) Calibration & reporting: brightness/colour calibration to target, report pack with readings, photos and recommendations.
What we service and stock — parts that move the needle
Laser drivers and PSUs • Phosphor wheels and bearings • Air filters, blowers and ducts • Temperature sensors and harnesses • Optics cleaning kits • Backplanes and input boards • Network/control modules • Fans and seals. Stock varies by model; we advise availability and lead times up front.
We test removed modules on the bench where possible. Repaired boards are labelled and accompanied by test readings. If an assembly is uneconomical to repair, we source a replacement and recalibrate the unit accordingly.
The aim is to deliver a projector that performs to spec and stays that way, backed by data you can share with clients or internal stakeholders.
Cooling loops and optics hygiene — protect output and electronics
Laser projectors depend on predictable thermals. We rebuild clogged air paths, replace tired blowers, reseat sensors and renew TIMs where accessible. Stable temperatures extend diode life, reduce noise and safeguard colour stability.
Optically, we clean accessible elements and reseal to limit dust ingress. On high-brightness units we check prism cleanliness and alignments as permitted by the design. A clean optical path improves contrast and uniformity.
Post‑service we validate temperatures, fan RPM and brightness over time to ensure the fix holds in real conditions.
Interlocks and compliance — safe service for high‑power lasers
We observe manufacturer procedures for service interlocks, covers and laser safety. Our documentation records interlock status, protective measures and test environments. This protects staff and venues and supports compliance for insurance or audit requirements.
We never bypass safety features to force a pass. Instead we find root causes and repair, proving the fix with readings and logs.
Each unit leaves with an engineering report summarising faults found, work performed, parts used and post‑service measurements.
Planned maintenance — fewer surprises, longer life
We propose realistic service intervals based on environment, usage and model. Filter changes, fan health checks and periodic cleaning prevent derating and downtime. We can also create a fleet plan for rental and events companies with rotation and colour matching guidance.
When you log hours and errors consistently, we can anticipate service windows and pre‑stage parts, shortening turnaround.
We’re happy to advise on venue airflow improvements that quietly extend equipment life.
Sectors we support — fixed install, live events, simulation
Live events: fast turnarounds, colour matching and electrical checks keep shows on schedule. We provide sign‑off sheets useful for clients and touring teams.
Museums and attractions: long duty cycles and dust management. We help specify filter regimes and validate brightness to maintain exhibit quality.
Higher education and corporate: uptime and predictable maintenance budgets. We document everything for procurement and internal chargeback.
Simulation / domes: high uniformity and precise colour matching across arrays. We align to targets and provide documented settings for repeatability.
UK, Ireland & Europe — collection, return and clear comms
We arrange insured courier collection and return with packaging guidance. For large or flight‑cased units we coordinate logistics to suit your site hours. Updates are proactive: intake confirmation, diagnosis summary, repair approval, calibration notes and dispatch details.
Engineering reports are written in plain language and include the data you need for sign‑off: power rails, thermals, brightness and colour targets, plus recommendations for the venue.
If a unit is beyond economical repair, we advise options and can return the unit disassembled for parts recovery on request.
Transparent pricing — diagnostics first, then informed approval
We begin with a fixed‑price diagnostic that covers intake, testing and the written report. Repair costs depend on parts and labour required; we itemise everything and won’t proceed without your approval. Fleet and trade customers can arrange service terms.
Turnaround varies with parts availability and complexity. We maintain common fans, sensors and consumables; specialised modules may require sourcing or board‑level repair. We’ll set expectations clearly at approval stage.
All work is covered by our service warranty; details are included in the report.
Frequently asked questions
Can you repair units that were exposed to heavy dust? Yes. We perform deep cleaning, replace filters and address fan issues. We also recommend practical dust control steps for venues.
Do you calibrate to a standard? We can target Rec.709 or a client‑preferred white point and gamma. We document pre‑/post‑measurements for transparency.
Will repairs affect my warranty? We follow responsible service practices and use OEM parts or proven equivalents. We’ll advise case‑by‑case where manufacturer terms may apply.
How do you handle urgent event turnarounds? We triage quickly, communicate options and prioritise critical fixes. Where a full repair isn’t feasible immediately, we can stabilise for an event and complete the balance afterward.