Other - Optoma EP721 Family Service Manual

4-9 Others
1. Functional Inspection
Keypad button
General
Factory Default
Display Size
Display Data Channel (DDC) - The purpose of the DDC test is to verify the DDC1/
Acoustic
- All keypad buttons must operate smoothly.
- All OSD functions must be checked for functional-
ity. When OSD menu is displayed, there shall be
no visible peaking, ringing, streaking, or smearing
artifacts on the screen.
- The factory settings (with appropriate centering,
size, geometry distortion, etc.) shall be displayed
upon "Recall" is selected from OSD.
- All preset modes shall expand to full screen size
using OSD Horizontal and Vertical Size controls.
DDC2B operation of the projector and to verify
Plug & Play function.
- High pitch sound from cooling fan and color
wheel is unacceptable.
EP721/727/723/728 Family / EW1610 Family Confidential
4-11