Canon D78-5152, Service Manual

Page: 73 / 134

3.2 Integrator Lens Adujstment
[Before adjustment]
• Adjustment requires a 2.0mm hex driver and a slot screwdriver.
• Remove cabinet top following to “Mechanical Disassemblies”.
[Adjustment]]
1. Turn on lamp by a state of without FPC cable of LCD panels.
2. Shield the red and blue lights by inserting thick papers etc. in front of Red and Blue
LCD panels to project only green light and make a fine focus.
3. Remove the shield in front of Red LCD panel to project green and blue light.
4. Adjust the adjustment base of integrator lens ass’y to make color uniformity in
yellow.
1) If the color shade appears on the left or right of the screen as shown in Fig.3-13,
loosen 1 screw A with the 2.0mm hex driver and adjust a slot
B
to make color
uniformity in yellow by turning a slot screwdriver.
2) If the color shade appears on the top or bottom of the screen as shown in Fig.3-
14, loosen 2 screws
C
with the 2.0mm hex driver and adjust a slots
D
to make
color uniformity in yellow by turning a slot screwdriver.
5. Tighten 1 screw
A
and 2 screws
C
to fix the integrator lens unit.
6. Remove the shield in front of Blue LCD panel and project red, green and blue light.
Check that there is no color shade on the left or right of the screen. If you recognise
the color shade, the “Relay Lens Adjustment” should be carried out to obtain the
proper color uniformity.
Part 3: Adjustment
3-17
CAUTION
Do not disconnect the connectors on main and component boards
otherwise the projector can not be turned on.