Service manual

C20
Condential
4-4
4-6 PC Mode
1. Bright Pixel
Note: Link Chroma VGA port to the ‘‘Universal I/O’’ port of the projector
by universal to VGA cable.
Procedure - Test equipment: video generator.
- Test signal: analog 800x600@60Hz.
- Test Pattern: Gray 10 pattern
Inspection item - Bright pixel check.
- Adjacent pixel check.
Criteria - Bright pixel is unacceptable.
- Only one bright dot on frame is acceptable.
- Adjacent pixel with each other is unacceptable.
2. Dark Pixel
Procedure - Test equipment: video generator.
- Test signal: Analog 800x600@60Hz.
- Test Pattern: white pattern
Inspection item - Dark pixels check.
- Adjacent pixel check.
Criteria - The number of the dead pixels should be less or
equal to 4 pixels.
- Adjacent pixel with each other is unacceptable.
white pattern
Gray 10