Table of Contents
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Introduction
Fundamental Principle
Troubleshooting
Function Test and Alignment Procedure
Screen Uniformity and Flicker :
Test Signal : 1024 x 768 @ 85Hz
Test Pattern : Full White Pattern
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Please check and see if it’s in normal condition.
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If not, please return the unit to repair area.
Dead Pixel/Blemish Pixel :
Test Signal : 1024 x 768 @ 85Hz
Test Pattern : Gray 30, Blue 180, White, Dark, Red, Green and Blue Pattern
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Please check and see if there are dead pixels on DMD chip.
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The total numbers and distance of dead pixels should be complaint with specification.
Check for Secondary Display Modes
Test signal :
Normally when the primary mode 1024 x 768 @ 85Hz is well adjusted and complaint with the
specification, then the secondary display modes will be great possibility to be complaint with
the specification. But we still have to check with general test pattern to make sure every sec-
ondary modes is complaint with specification.
Factory Reset :
After final QC step, we have to erase all saved change again and restore the factory defaults.
Please select and enter “Factory Reset” Function to see if it is workable. This action will allow
you erase all end-user’s settings and restore the original factory setting.
Mechanical Construction
Procedure of Disassembly
Firmware Upgrading Procedure
1.)
640 x 350 @ 70 / 85Hz
2.)
640 x 400 @ 70 / 85Hz
3.)
640 x 480 @ 72 / 75 / 85Hz
4.)
720 x 400 @ 70 / 85Hz
5.)
800 x 600 @ 56 / 60 / 72 / 75 / 85Hz
6.)
1024 x 768 @ 43.4 / 60 / 70 / 75 / 85Hz
7.)
1280 x 1024 @ 60 / 75Hz
Function of Boards
Specifications
DDC Key-In Procedure
Appendix
8-9
EP757
SERVICE MANUAL
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