ViewSonic PJ755D Service Manual - Page 24

Change Main Board or DMD Board. - specs

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Note1 : ( Press “Power” “Up” “Down” and “Right” button to enter “Engineer Model) Enter “Engineer Mode” first and choose “Engineer Mode 3” to adjust “Brightness-R/G/B”. Note2 : Enter “Engineer Mode” fisrt and choose “Engineer Mode 1” to adjust “Color Wheel Index” 3.) The image displayed with picture noise issue. - Press “SOURCE” button to re-catch the signal again. - Check the signal cable. - Check Main BD if there is no picture noise issue when you input the signal with the other connector. Judge - Change Main Board. 4.) The image displayed with Dead Pixel/Line issue. - Check DMD chip if the bright dot issue exists when you input the signal. Judge - Change DMD Board or DMD Chip. 5.) The image displayed with focus issue. - Adjust Focus Ring. - Ensure the projection distance is in spec. Judge - Change Optical Engine Module 6.) The image displayed with flicker issue. - Check the Lamp Module - Ensure the signal cable works well. - Press “SO URCE” button to re-catch the signal again. Judge - Change Main Board or DMD Board. 7.) Theimagedisplayedwithuniformityissue. - Ensure the projection lens is clean. - Replace the lamp if the brightness is less than spec. Judge - Change the Optical Engine Module. ViewSonic Corporation 3-3 PJ755D

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PJ755D
3-3
ViewSonic
Corporation
Note1 : ( Press ±Power² ±Up² ±Down² and ±Right² button to enter ±Engineer Model)
Enter ±Engineer Mode² first and choose ±Engineer Mode 3² to adjust ±Brightness-R/G/B².
Note2 :
Enter ±Engineer Mode² fisrt and choose ±Engineer Mode 1² to adjust ±Color Wheel
Index²
3.)
The image displayed with picture noise issue.
-
Press ±SOURCE² button to re-catch the signal again.
-
Check the signal cable.
-
Check Main BD if there is no picture noise issue when you input the signal with the other
connector.
Judge
-
Change Main Board.
4.)
The image displayed with Dead Pixel/Line issue.
-
Check DMD chip if the bright dot issue exists when you input the signal.
Judge
-
Change DMD Board or DMD Chip.
5.)
The image displayed with focus issue.
-
Adjust Focus Ring.
-
Ensure the projection distance is in spec.
Judge
-
Change Optical Engine Module
6.)
The image displayed with flicker issue.
-
Check the Lamp Module
-
Ensure the signal cable works well.
-
Press ±SO URCE² button to re-catch the signal again.
Judge
-
Change Main Board or DMD Board.
7.)
The image displayed with uniformity issue.
-
Ensure the projection lens is clean.
-
Replace the lamp if the brightness is less than spec.
Judge
-
Change the Optical Engine Module.