Hughes JVC Projector 250 Sc Service Manual

Chapter 8---Software and Protocol
8-14 Model 250 Service Manual 

Chapter 9---Parts List
Model 250 Service Manual 9-1
9.0 Parts List
Contents
9.1  Replacement Parts List ................................................................................. 9-1
9.2  Spares ........................................................................................................... 9-3
9.1 Replacement Parts List
Table 9-1  
Replacement parts list
Description Part no.
Arc Lamp Module 106298
Cathode Ray Tube (CRT) 105199
Contrast Enhancer 104247
CRT/Yoke Assembly 105384
Ignitor...

Chapter 9---Parts List
9-2 Model 250 Service Manual
Description Part no.
Power Cord, USA/Japan 104499
Power Cord, Europe 103939
Power Supply, Arc Lamp 105216
Power Supply, High Voltage 102566
Power Supply, Low Voltage 102520
Prism Tank Assembly 103942
Projection Lens, 0.96:1, Fixed 105134
Projection Lens, 1.5:1, Fixed 106687
Projection Lens, 2.4:1, Fixed (Simulator) 103592
Projection Lens, 5.6:1, Fixed 104337
Projection Lens, Zoom (2:1 - 4:1) 103746
Remote Control, Executive 105576
Remote Control,...

Chapter 9---Parts List
Model 250 Service Manual 9-3
9.2 Spares
It may be advisable to maintain a supply of spares for the projector to minimize
downtime. This is particularly important when projectors are being operated on a
continuous basis or when multiple projectors are needed. Table 9-2, below,
provides a list of the spares that HJT recommends for one to four projectors.
Table 9-2   
Recommended minimum spares
Part no. Description Quantity
105236 PCA Horiz/Vert Deflection 1
105210 PCA Conv/Defl 1...

Chapter 9---Parts List
9-4 Model 250 Service Manual 

Glossary
Model 250 Service Manual A-1
Glossary of Terms
AmorphousWithout definite form; not crystallized.
Arc LampThe high intensity light source in the Model 250
projector. The Xenon Arc Lamp operates at high
temperatures (160° to 200°) and produces
dangerously intensive light with hazardous levels
of ultraviolet and infrared radiation.
Aspect RatioThe ratio of the picture width to picture height.
The standard U.S. television aspect ratio is four
units wide to three units high (4:3).
BandwidthBandwidth...

Glossary
A-2 Model 250 Service Manual
FieldOne half of a complete video frame. Odd lines in
one field and even lines in another make up one
frame.
FrameOne complete TV picture or screen of
information. It is composed of two fields and has
a total of 525 scanning lines in NTSC
transmission.
Horizontal ScanReverses the image projection for front or rear
Reversal Jumperprojection. Located on the Horizontal Deflection
Board and Scan Reversal PCB.
Horizontal Size CoilsAdjustment coils on the Scan Reversal...

Glossary
Model 250 Service Manual A-3
LumenA unit of measure of the flow, or rate of emission,
of light measured with a Light Meter.  An
ordinary wax candle generates 13 lumens while a
100-watt bulb generates 1,200 lumens.
LuminanceAbbreviated as Y.  The portion of the YPbPr
and S-image signal that contains the black and
white information, which affects brightness.
NoiseAn undesirable electrical interference of a signal.
OverscanningDisplaying less than the complete area of an
image to a viewer (i.e.,...

Glossary
A-4 Model 250 Service Manual
S-VideoAn image signal that has the luminance (Y)
information separated from chrominance (C)
information.
Saturated Color1) A color as far from white, black or gray as it
can be (i.e., vermilion rather than pink).  2) A
display misadjustment that results in unnaturally
bright colors.
ScanTo scan, is to move across the image frame, one
line at a time, either to detect the image, as in an
analog or digital camera, or to refresh a CRT-
based display.
Scan LineOne...

Glossary
Model 250 Service Manual A-5
alternating white and black horizontal lines that
can be counted from the top of the picture to the
bottom.
Vertical Scan FrequencyThe number of times per second a display image
is written or refreshed.
Vertical ScanReverses the image vertically for use with
Reversal Jumpermirror-bounced displays. Located on the Scan
Reversal PCB.
Vertical SynchronizationThe number of times per second a frame is
Frequencytransmitted to a video display screen.
Xenon Arc LampSee Arc...