Vivitek DH268, Service Manual

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4.4 Resolution
I/O port VGA
Test Equipment PC
Test Method 1. Rotate Zoom ring to wide mode (Maximum projected
image)
2. Fix projector to set diagonal length of projected image to
60”.
3. Adjust focus ring to make resolution of 4 corners and
center are balanced.
4. Check he characters should be recognized easily.
5. Rotate Zoom ring to tele mode (Minimum projected
image)
6. Adjust focus ring to make resolution of 4 corners and
center are balanced.
7. Check the characters should be recognized easily.
4.5 Front infrared sensor
Device
Front infrared
Test Equipment Remote controller
Test method and Criteria Operate remote controller to test front sensor is normal
4.6 Safety test equipments
Test items
Safety test
Test Equipment Safety analyzer
Test method 1. Clamp the screw near the VGA connector
2. Plug the power cord to socket
Test criteria
GND 30A 3sec 100m
Ω
CONT
10Ω
3sec
DCW 2506V 1sec 10mA
Single Step OFF