Optical Adjustment - Sanyo PLC-WTC500AL Service Manual

Optical Adjustment

WArNING : uSe uV rAdIAtIoN eYe ANd SKIN ProtectIoN
cAutIoN: to prevent suffer of uV radiation, those adjustments
Before Adjustment
1
Each adjustment requires hex wrenches and slot screw-
drivers. The adjustments require long handle type tools
because of not removing the main board.
2
Set the lens position specified below with Lens Shift But-
ton.
Horizontal Lens Position: Center
Vertical Lens Position: End of the bottom
3
When adjusting optical components adjustments, using
Standard Zoom Lens is recommended.
4
When adjusting the optical axis adjustment and contrast
adjustment, use the internal test pattern. To select the
internal test pattern, see the item below.
* Do not disconnect the sockets on the main board other-
wise the power protection function will operate to shut-
down the projector.
5
These adjustments should be taken in the darkest room
to adjust precisely.
CAUTION: Do not short main board with the chassis.
Protect main board with necessary isolation
materials from shorting.
To select the internal test pattern
1
Press the MENU button.
2
Select the "Test pattern" from the "Setting" menu.
3
Press the SELECT button. The test pattern menu ap-
pears on the screen.
4
Select a pattern name and press SELECT button.
To cancel the test pattern, press any of the buttons.
CAUTION:
When adjusting the optical components, do not insert any materials into the
optical block for blocking the light. Or the optical block may be damaged by
overheating or scratching the parts.
durING SerVIcING
must be completed within 25 minutes.
Mirror adjustment
Test pattern
-46-
Relay lens ad-
justment
Condenser lens
adjustment
Setting
Color
Gradation 1
Gradation 2
Gradation 3
Gradation 4
All white
All black
Cross