Vivitek DH268, Service Manual

Page: 34 / 69

32
Chapter 4 Function Test & Alignment Procedure
After repairing projector (Disassembly and assembly projector), Repair center should
verify
the quality of repaired unit.
4.1 Signal test (Each I/O can function normally)
Connect all connector to the jacks one after the other to check whether each channel can
project normally
I/O port
COMPUTER
（
VGA
）
Test Equipment Standard Pattern Generator (Ex. Quantum data)
Signal format SVGA: 800 x 600 /60Hz XGA: 1024 x 768 /60Hz
I/O port HDMI
Test Equipment
HDMI source device (DVD player)
I/O port Video
Test Equipment Standard Pattern generator (Ex. Quantum data) or DVD player
Signal format NTSC
I/O port Audio
Test Equipment Connect audio input to audio output of DVD player
Signal format NTSC
I/O port RS232
Test Equipment Connect PC
4.2 Operation test
Buttons operation
Button description Test criteria
Power 1. Touch “power” button and projector will power on, and in standby
mode the LED should solid.
2. Touch the “power” button (Up & Down) should be sensitive
3. The LED indicator lighteness and uniformity normally