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Part 2: Repair Information
2-11
4.5 LCD Panel/Prism Ass’y Removal
1. Insert the hexial driver into a hole
on the cabinet bottom and loosen
1 screw
A
on the Prism base.
2. Loosen 2 screws
B
on the LCD
Panel/Prism ass’y.
3. Pull the LCD Panel/Prism ass’y
upward off from the optical unit.
Note:
Do not remove the LCD panels
from the Prism ass’y. Do not
replace the LCD panel
separately otherwise it cannot
obtain proper picture.
Fig. 2-16
LCD Panel/
Prism Ass’y
B
A
IMPORTANT NOTICE on LCD Panel/Prism Ass'y Replacement
LCD panels used for this model can not be replaced separately. Do not
disassemble the LCD Panel/Prism Ass’y. These LCD panels are installed with
precision at the factory. When replacing the LCD panel, should be replaced whole
of the LCD panels and prism ass’y at once.
After replacing LCD Panel/Prism ass’y, please check the following points.
• Check that there is no color shading at the top, bottom, left or right of
the screen. If there is, try to remove the shading following to the
chapter “Optical Adjustment”.
• Check the white balance. If it needs the adjustment, adjust the white
balance following to the “White Balance Adjustment”, “Gamma
Adjustment” and “Common Centre Adjustment” in the chapter
“Electrical Adjustment”.
• Check the white uniformity on the screen.
If you find the color shading at the some part of the screen, it needs to
take the color shading adjustment. This adjustment should be
performed by a computer and it also requires a special software “Color
Shading Correction”.
CAUTION
Summary of Contents for LV-X4U
Page 2: ...CANON Multimedia Projector LV X4U D78 5532 LV X4E D78 5533 SERVICE SMANUAL ...
Page 9: ...Part 1 General Information ...
Page 26: ...Part 2 Repair Information ...
Page 43: ...Part 3 Adjustment ...
Page 62: ...Part 4 Troubleshooting ...
Page 79: ...Part 4 Troubleshooting 4 17 AN5870SB RGB SYNC SW IC5201 LM4889 Audio Amplifier IC5031 ...
Page 81: ...Part 4 Troubleshooting 4 19 FA5502 P F Control IC621 VPC3230D Video Decoder IC101 ...
Page 84: ...Part 4 Troubleshooting 4 22 TA1370FG Sync Separator Frequency Counter IC5302 ...
Page 85: ...Part 5 Parts Catalog ...
Page 86: ......
Page 94: ......
Page 100: ...Part 6 Electrical Diagrams ...