Service manual

C20
Condential
4-6
4-7 Video Performance
Note: Plug JACK-M to 3*RCA-F R/W/Y cable into the AV-IN port of
projector, the CVBS signal and Audio signal will be inputted.Then
turn the sound of DVD player down.the signal test is as follows.
1. ECO/Bright Mode Function Test
Turn on the projector, get into service mode then press ‘‘Left’’/‘‘Right’’
button on remote control to check if Bright mode/ECO mode
exchange normally.
2. CVBS
Procedure - Test equipment: DVD player
- Test signal: CVBS
Inspection item - Video performance test
Inspection Distance - 0.8 M ~1.0 M
Criteria - Check any abnormal color, line distortion or any
noise on the screen.
- Check the sound from speaker.
3. Audio Test
Procedure - Test equipment: DVD player
- Test signal: CVBS
Inspection item - Audio performance test
Inspection Distance - 0.8 M ~1.0 M
Criteria - Check the sound from speaker
- Press ‘‘Up’’ button of the projector to
modulate the volume to 18, then press “down“
button to modulate the volume to 15, check
whether the volume is normal.
Motion video
CBVS Signal Cable
AV-IN Port
AUDIO Signal Cable