Kodak Trendsetter Startup Focus Failure Repair Case

The device was unable to stably complete the focus scan during the startup self-test.

Fault Symptoms

• Repeated focus failure after power-on
• CRB signal becomes more unstable after warm-up
• Returned to normal after recalibration

Root Cause Analysis

Z-axis focus position drift combined with optical path contamination resulted in insufficient signal margin.

Solution

The technician cleaned the optical path, checked the CRB signal, and performed focus recalibration.