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Chapter 2---System Description
Model 250 Service Manual 2-1
2.0 System Description
Contents
2.1 Introduction.................................................................................................. 2-1
2.2 Electrical Section.......................................................................................... 2-2
Incoming Power Circuit............................................................................. 2-2
Power Supplies........................................................................................... 2-2
Igniter Assembly........................................................................................ 2-3
2.3 Optical Section............................................................................................. 2-3
Arc Lamp Module...................................................................................... 2-3
Optical Path................................................................................................ 2-3
ILA
®
s.......................................................................................................... 2-4
CRTs .......................................................................................................... 2-4
Relay Lenses .............................................................................................. 2-5
Projection Lens........................................................................................... 2-5
2.4 Electronic Section ........................................................................................2-5
VICs ........................................................................................................... 2-5
PCBs........................................................................................................... 2-6
CRT/Yoke Assemblies............................................................................... 2-7
2.5 Miscellaneous Items..................................................................................... 2-7
Projector Covers......................................................................................... 2-7
IR Detectors................................................................................................ 2-7
Cooling Fans .............................................................................................. 2-7
Air Filters ................................................................................................... 2-7
EMI Shield ................................................................................................. 2-8
2.1
Introduction
This chapter is divided into four basic sections: the Electrical Section, the Optical
Section, the Electronic Section and the Miscellaneous Items. Each section gives a
basic description of the components in the section and a description of the
function of those components. This provides an overall view of the projector and
its subsystems for a general understanding of how these systems contribute to the
function of the projector.