Hardware Overview - Epson EMP-S4 Service Manual

2.1 Hardware Overview

The hardware for the EMP-S4 can basically be divided into two sections: the optical engine
and the circuit system. This section of the manual describes functions of the major hardware
components.
The components and unit in the dotted frame shown in the diagram below make up an optical
engine and MA Board Kit, which is provided as one part.
170
Overview of Display Operation
1. The MA Board receives RGB/Component signals from the Computer port. Video signals or
S-Video signals are provided to the MA Board from the CVBS input or S-Video port. Ana-
log signals are converted to digital signals at the MA board.
2. The digital display signals are temporarily stored in video memory on the MA board.
3. The R, G and B light valves control the amount of light that passes through the valves.
4. The light that passes through the light valves is combined by the prism and projected as an
image through the projection lens unit.
SEIKO EPSON
EMP-S4
*1: The Intake Fan cools the R, G and B light
valves (LCD panels).
*2: The Exhaust Fan and the Lamp Fan mainly
exhaust heat from the Lamp Assy.
*3: During repair work, the section enclosed by the
dotted lines should be handled as a single unit.
Figure 2-1.
2-2 Revision:B