Mitsubishi Electric LC62 CHASSIS XL6500LU, Руководство по обслуживанию

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DUST ON LCD PANEL
Small amount of dust might lie on the LCD panel or polarizer
plate in the course of operating time of the LCD projector and
cause poor image. Residual dust inside the product might
collect on the LCD panel or polarizer plate. and cause poor
image. Clean the inside of the product, as follows.
Symptom
When Projecting R, G, B Monochrome
Pictures and White Raster
• Dust appears to be a black spot such as a missing pixel on
R, G, B monochrome pictures. The black spot appears to
be blurry when the picture is in focus.
Note: If the black part appears sharp in the shape of LCD
pixels when the picture is in focus, the defect lies in
LCD panel.
• Cyan, magenta, or yellow blurry spot appears, when the
picture is in focus on the white raster.
Note: If the spot appears sharp in the shape LCD pixels
when the picture is in focus, the defect lies in LCD
panel.
When Projecting Black Picture
• R, G, or B blurry light appears on the black picture when
the picture is in focus.
Note: If R, G, or B point appears sharp in the shape LCD
pixels on the black picture when the picture is in fo-
cus, the defect lies in LCD luminescent points.
Before Cleaning
Before cleaning the inside of the product, be sure to check the
fitter of the intake fan and replace if too dusty.
When reinstalling the filter, confirm carefully that there is
no dust or other foreign object on the side facing inside the
product. Reinstall the filter as originally installed.
Cleaning
Blow off the dust on the LCD panel side or polarizer plate side
using air duster, etc. Refer to the followings.
• If dust appears on the R, G, or B monochrome pictures,
dust lies near the LCD panel or polarizer plate of each
color.
• If dust appears on the white raster, confirm on the R, G, or
B monochrome pictures.
(Reference)
If dust appears to be cyan
: Dust lies near the red LCD panel or polarizer plate .
If dust appears to be magenta
: Dust lies near the green LCD panel or polarizer plate.
If dust appears to be yellow
: Dust lies near the blue LCD panel or polarizer plate.
• If dust appears on the black picture, it lies near the LCD
panel or polarizer plate of each lit color.
• Confirm the picture by shifting the focus lens from the
standard point where the picture is in focus.
If dust appears sharply when the focus lens is shifted for-
ward (counterclockwise seeing from the front), it lies near
the lens side of each LCD panel or the polarizer plate.
If dust appears sharply when the focus lens is shifted
backward (clockwise seeing from the front), it lies near the
light source side of each LCD panel or the polarizer plate.
After Cleaning
Reinstall the upper case ASSY, etc. after cleaning. Set the
product to the normal condition and check the picture. To pre-
vent dust from entering the inside of the product, instruct the
user to confirm carefully that there is no dust or foreign object
on the side of the filter facing inside and to reattach the filter
as was originally attached.
RESET OF THE THERMAL PROTECTOR
This projector can not be turned on when the Thermal Protec-
tor is off. Press the button of the Thermal Protector to turn it
on.
1. Remove the terminal cover ASSY according to “DISAS-
SEMBLY” in “1.Removal of the terminal cover ASSY.”
2. Remove the front case unit and top cover unit according to
“DISASSEMBLY” in “3.Removal of the lens unit and zoom
focus motor.”
3. Remove the top case unit according to “DISASSEMBLY”
in “4.Removal of the top case unit and KEY PCB ASSY.”
4. Remove the main barrier according to “DISASSEMBLY” in
“9.Removal of the power fan.”
5. Press the button of the Thermal Protector.
Button of the Thermal
Protector