Hughes JVC 100, Service Manual

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Chapter 2---System Description
Model 100 Service Manual 2-1
2.0 System Description
Contents
2.1 Introduction .................................................................................................. 2-1
2.2 Optical System ............................................................................................. 2-2
The Arc Lamp Module ............................................................................... 2-2
The Illumination Path................................................................................. 2-2
CRT \ ILA
®
Module ................................................................................... 2-6
Front Projection Lens ................................................................................. 2-8
2.3 Electronics System ....................................................................................... 2-9
General Description.................................................................................... 2-9
Power Supplies........................................................................................... 2-10
Video Input Cards (VIC) ............................................................................ 2-15
Video Processor PCB ................................................................................. 2-24
System Controller/ Raster Timing Generator PCB .................................... 2-28
Deflection Processor PCB .......................................................................... 2-35
Vertical Convergence Deflection PCB....................................................... 2-38
Horizontal Deflection PCB ........................................................................ 2-41
Regulator for three CRTs ........................................................................... 2-44
Video Amplifier PCBs ............................................................................... 2-46
Backplane PCB .......................................................................................... 2-49
2.1 Introduction
The Model 100 Projector consists of assemblies and components, which are
grouped into the three main sections listed below. Included in each of the sections
is a list of the main components found in that section and a brief description of
their function (see Figure 4-1 for physical locations of assemblies and
components).
!
The Optics Assembly Section sits toward the front of the projector. It
consists of an Arc Lamp Module, the Illumination Path, the CRT/ILA
®
Modules and the Front Lens. The Arc Lamp Module provides the 750
Watt high intensity light source for the projected image. The illumination
path consists of optics that filter, polarize, separate the beam into red,
green, and blue light and direct it to the ILA
®
and then to the Front Lens
Assembly. The ILA
®
\CRT Modules supply the image and modulate the
light to create the projected image. The Front Lens sends the image to the
screen.