Acer P3250 Acer P1350 and P3250 Projector Series Service Guide - Page 74

Display Data Channel (DDC)  Acoustic - T he purpose of the DDC test is to verify the DDC1/DDC2B operation of the projector and to verify Plug & Play function. - High pitch sound from cooling fan and color wheel is unacceptable. 2. Check points for exterior and print pattern Check item Text & Pattern Exterior Buttons Focus ring Logo Screw Pedestal Lamp Cover Plastic Parts Safety or warning label Connector Check point Missing letters & pattern or blurry prints are unacceptable. Dirt, scrape, water ripples and uneven color are unacceptable. Stuck buttons are unacceptable. Focus ring is functioning smoothly. Missing logo, missing prints and blurry prints are unacceptable All screw sure be fixed and in right type. Well-functioned It should be locked in the correct place. All plastic parts can not be brocken and damaged. All safety and warning label should be visible, including all contents. All interface connector should be complete and workable. P3150/P3250/P3150 Refresh/P3250 Refresh Confidential 4-12