1.    Preparation Phase (Critical for Consistency)

Environment Setup: Maintain a standardized test chamber (temperature: 23°C±2°C, humidity: 50%±10%).    Use a stable, regulated power supply and a dedicated, clean power circuit to avoid fluctuations.

Instrument Calibration: Calibrate all measurement devices (light meter, colorimeter, sound level meter, thermal imager) before the test cycle.    Prepare reference test patterns (ANSI standard slides for uniformity, focus, color).

Unit Conditioning: Prior to formal testing, condition the projector under test at full brightness on a static pattern for 30 minutes to reach thermal equilibrium.    Document the initial firmware version and settings.

2.    Core Stability Test Process

Extended Burn-in Test: Operate the unit continuously for a minimum of 72 hours in a high-ambient-temperature scenario (e.g., 35°C), cycling through various modes (High Brightness, Eco, Dynamic).    Log any unexpected shutdowns, fan speed anomalies, or flickering.

Thermal Performance & Stress Testing: Monitor critical component temperatures (LED/Laser source, DMD/LCoS chip, main board) using thermal sensors.    Conduct thermal shock testing by rapidly changing ambient temperature (e.g., from 15°C to 40°C) over short cycles.

Electrical & Signal Integrity: Test under variable input voltage (e.g., 90V-264V for AC models).    Use an HDMI pattern generator to test for signal lock, HDCP handshake stability, and artifacts over extended cable lengths (e.g., 15m+).    Include repeated power on/off cycles (≥ 500 cycles).

Mechanical & Acoustic Evaluation: Test auto-keystone, focus motor functionality repeatedly (≥ 1000 cycles).    Measure fan noise in dBA at a standard distance (1m) in a silent room after 4 hours of operation.

3.    Pre-shipment Verification

Final Functional Check: Perform a condensed 2-hour soak test post-packaging simulation (vibration test).    Verify all critical functions: lens clarity, input ports, remote control/IR sensor, and WiFi/Bluetooth connectivity.

Critical Parameter Sampling: For each batch, sample units undergo a shortened 24-hour burn-in.    Key metrics (luminosity, color accuracy, contrast ratio) are measured and compared against the initial data recorded during the first test phase.    Any deviation beyond 5% triggers root cause analysis.

Cosmetic & Packaging Inspection: Ensure no physical damage incurred during testing.    Verify all accessories, manuals, and correct regional power cords are included per shipping destination.

This structured approach ensures projector from YOUXI delivers consistent performance, reliability, and user experience under diverse operating conditions.