Table of Contents
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2.0 System Description
Contents
2.1 Introduction .............................................................................. 2-1
2.2 Optical System......................................................................... 2-2
2.3 Electronics System .................................................................. 2-7
2.4 Image Light Amplifier Technology ........................................... 2-61
2.1 Introduction
Model 220 Service Manual
2.2.1 Image Path................................................................... 2-2
2.2.2 Arc Lamp Light Path .................................................... 2-4
2.3.1 General Description ..................................................... 2-7
2.3.2 Power Supplies ............................................................ 2-8
2.3.3 Video Input Cards ........................................................ 2-13
2.3.4 Video Processor PCB .................................................. 2-23
2.3.5 Video Amplifier PCB .................................................... 2-28
2.3.6 System Controller PCB ................................................ 2-32
2.3.7 Raster Timing Generator PCB ..................................... 2-38
2.3.8 Horizontal/Vertical Deflection PCB .............................. 2-43
2.3.9 Convergence/Deflection PCB ...................................... 2-49
2.3.10 Scan Reversal PCB ..................................................... 2-55
The assemblies and components in the Model 220 projector are
contained mainly in the five sections below:
•
The Optics Assembly Section is located at the front area of
the projector. The Optics Assembly Section includes the Cold
Mirror/IR Filter, (CAUTION!
because the mirror passes infrared light and its reflection
contains only "cold' light that does not transmit appreciable
heat. As a result of the absorption of infrared heat radiation,
"cold" mirrors can get very hot.), Second Condensing Lens
Ultraviolet Filter, Diffuser, Dichroic Mirror Assembly, Prisms,
Combining Prism, Image Mirrors, and the Zoom Projection
Lens.
•
The Arc Lamp Assembly section is located in the right front
area of the unit. It contains the Ignitor, Laser Power Supply,
Xenon Arc Lamp and First Condensing Lens.
Chapter 2---System Description
:
The term "cold mirror" is used
2-1
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