Chapter 4—Setup Adjustments
4-22
Hughes-JVC Technology Corporation
CRT Focus and H/V Dynamic Focus). This factory-setting does not
normally require readjustment. The F
OCUS
E
NABLE
box in the
P
REFERENCES MENU
may now be unchecked to prevent accidental
defocusing.
4.4. CRT Focus and H/V Dynamic Focus
The CRT and H/V Focus adjustments are factory-set and do not normally require
adjustment. They should be performed together in a back-and-forth manner to
achieve the best possible overall focus.
To perform the CRT Focus:
1. From the F
ACTORY
A
DJUSTMENTS MENU
, select CRT F
OCUS
.
2. Select G on the remote.
3. Select the S
TANDARD
C
ROSSHATCH
test pattern.
4. Use the up/down arrow keys to obtain the best possible focus in both the
center of the screen and in the overall test pattern.
5. Repeat the above steps for R and B.
To perform the H/V Dynamic Focus:
1. From the F
ACTORY
A
DJUSTMENTS MENU
, select H/V D
YNAMIC
F
OCUS
.
2. Continue with the S
TANDARD
C
ROSSHATCH
test pattern from above.
NOTE: The H/V Dynamic focus is performed on all three (3) colors together
and the colors are not individually selectable.
3. Use the up/down arrow keys to achieve the best possible focus at the edges
of the screen.
4. Repeat the CRT Focusing from above, then repeat the H/V Dynamic Focus
again. Several iterations may be needed to achieve the best possible overall
screen focus.
4.5. ILA
®
Sensitivity and Bias
ILA
®
Sensitivity and Bias are preset for the factory-set sources and will not
normally require adjustment. Readjustments may be required due to variations
between the factory and the field environments. When new sources are set up,
ILA
®
Sensitivity and Bias must be set (or copied from another source and
touched-up) for each new source.
The ILA
®
Sensitivity and Bias can be adjusted for any color. It is preferable to
start with Blue since Blue is a weaker color to observe than Red or Green. The
ILA
®
Sensitivity is the ILA
®
biasing frequency that affects the resolution and
brightness on the screen. The ILA
®
bias settings adjust the electrical bias levels
to each ILA
®
assembly to a “just off” threshold point. The smallest incoming light
from the CRT will cause the ILA
®
assembly to react. When properly set, this
adjustment will put each ILA
®
assembly at the threshold of operation. If set
incorrectly, the black level will be adversely affected and the ILA
®
assembly will
not react properly to incoming light. Perform all ILA
®
Bias adjustments in a
darkened room.
Summary of Contents for 100
Page 6: ...Table of Contents vi Hughes JVC Technology Corporation ...
Page 10: ...Safety Information x Hughes JVC Technology Company ...
Page 16: ...Chapter 1 Introduction 1 6 Hughes JVC Technology Company ...
Page 55: ...Chapter 4 Setup Adjustments HJT Model 100 User s Guide 4 3 ...
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Page 108: ...Chapter 6 System Specifications 6 4 Hughes JVC Technology Corporation ...
Page 118: ...Appendix B Export Import Procedures Appendix B 6 Hughes JVC Technology Corporation ...
Page 126: ...Chapter 7 Glossary Glossary 8 Hughes JVC Technology Corporation ...