Service manual
C20
Condential
4-7
4-8 SD Card Test
1. Turn on the projector and unplug signal cable, select “Video“, play the
video le in it:
- Check any abnormal color, line distortion or any noise on the screen.
- Check the sound from speaker.
2. Turn on the projector, connect “micro USB” port of the projector and
PC USB port by universal to USB cable:
- Check whether PC can detect the SD card information,there should be
three removable disk.
4-9 Optical Performance Measure
Inspection Condition
- Environment luminance: 2 Lux
- Product must be warmed up for 2 minutes
- Distances from the screen: 0.8 M~1 M
- Screen Size: 20 inches diagonal
1. Test equipment
Procedure - Please get into bright mode, focus
should be clear, the display format is 3:2.
- Get into service mode on remote control, then press
‘‘Left’’ or ‘‘Right’’ to select full white and full black
pattern, then start signal test.