Epson EMP-8000 - 2.1.1. Process Outline

2-3
EMP-9000/8000
SEIKO EPSON Revision:A
2.1.1. Process Outline
1. The video signal is provided to the main board Assy uniy from the IF unit. (Analog signal
should be once changed into digital signal by the Main board Assy uint.)
2. Video signal (digital) is once stored in the video memory (SRAM) on the Main board Assy
unit, then the Driver board Assy generates signals to drive the light valves R/G/B.
3. The light valves R/G/B are individual panels each others. They work to shut or transmit the
lights from the light guide unit.
4. The lights transmitted through the light valves will be combined the prism and projected
through the projection lens unit.
5. The audio signal is provided from AU board Assembly via Main board Assy unit from the IF
unit and be output to speaker R/L.
Circut process block
Figure2-2
Optical Process block
Figure2-3
Main board Assy unit
Digital
Analog
A/D
Display
Memory
Display controlAUboard
Assembly
IF unit
signal
signal
Speaker R
Speaker L
Driver board Assembly
Display
LCD
Converter
Driver
R
G
B
Light Valves
R/G/B
Correction
Display
Audio
Projection Lens
Light Valves R
Light Valves G
Light Valves B
Lamp inner
Housing
(Light Source)
Balast Unit
Driver board Assy
Prism (R/G/B sinthesize)