Hughes JVC Projector 230 Service Manual

Chapter 3---Service Adjustments
Model 230 Service Manual3-19
To adjust the Vertical height (
see Figure 3-14):
1.  Remove the rear cover (Section 4.2).
2.  Select the X-hatch test pattern.
 NOTE: Green is the master to which Red and Blue will be matched. The
Green height pot should not need adjustment except when the Green CRT
assembly has been replaced.
3.  Hide Blue and view Red and Green.
4.  If Red is higher than Green at the top 
and lower than Green at the bottom of
the X-hatch image, 
or If lower...

Chapter 3 Service Adjustments
3-20Model 230 Service Manual
Boot Software (boot.hex) and/or System Software (zsys.hex) and a PC with
Windows 3.1 is required to perform update.
Boot Manager Software and System Software are separate products. Each may
be updated independently. The System Software will depend on a specific version
of the Boot Manager. Refer to the System Software release bulletin for Boot
Manager version dependencies.
To perform software upgrade:
1.  Verify that the projector circuit breaker...

Chapter 3---Service Adjustments
Model 230 Service Manual3-21
11A. Enter the command loadboot at the prompt. You should see the
following output:
 Command: loadboot
 Boot Manager software update procedure
 ***WARNING: IMPROPER USE MAY MAKE THIS SYSTEM 
UNBOOTABLE*** (This warning relates to the Flash Memory
updating that occurs in Step 11D. Do not turn projector
power off while the Flash Memory is updating)
 Memory buffer reset to 0xff
 Begin your S-Record upload now (Esc to abort).
 11B. From the Windows...

Chapter 3 Service Adjustments
3-22Model 230 Service Manual
12. To update the System Software from the Boot Manager prompt:
 12A.  Type in the command “loadsys” at the prompt. The following should be
displayed:
 Command: loadsys
 System software update procedure
***WARNING: IMPROPER USE MAY MAKE THIS SYSTEM 
UNBOOTABLE*** (NOTE: This warning relates to the Flash 
Memory updating that occurs in Step 12D below. Do not 
turn projector power off while the Flash Memory is 
updating.)
 Memory buffer reset to...

Chapter 3---Service Adjustments
Model 230 Service Manual3-23
setup procedures are complete the Grey Scale test pattern should be grey
throughout. If the edges of the Grey Scale appear grey but the middle appears
color-tinged, this indicates that Gamma Tracking may need adjustment.
NOTE:Overall Gamma Tracking is usually best if no color is too near the extreme
(0 or 255). For example, if the middle gray level looks green and the Gamma
Tracking settings are; Red=128, Green=200, Blue=128, it is better to...

Chapter 3 Service Adjustments
3-24Model 230 Service Manual
 
Figure 3-15.   Graphic Enhancer Video Input Card.
3.13 Cleaning Lenses, ILA® Assemblies and Mirrors
The projection lens is the only item that requires periodic cleaning. Other
assemblies are covered to prevent dust entering or finger smudging. Cleaning
may be needed for special circumstances such as replacing an assembly.
Cleaning should only require removing excessive dust (use canned air such as
“Office Duster” or Aero Duster) or removing...

Chapter 4---Maintenance (Removal/Replacement)
Model 230 Service Manual4-1
4.0   Maintenance (Remove/Replace)
Contents
4.1   Introduction ..............................................................................................4-1
4.2   Projector Covers ......................................................................................4-4
4.3   Air Filters ..................................................................................................4-5
4.4   Arc Lamp Assembly...

Chapter 4---Maintenance (Removal/Replacement)
4-2Model 230 Service Manual
 WARNING!!! Various procedures in this chapter
involve the removal and replacement of system subassemblies.
Ensure that the projector circuit breaker is turned off and the AC
power plug is removed from the AC outlet PRIOR to attempting any
of these procedures.
When performing any maintenance procedures in this chapter, follow the
guidelines below:
Left/Right Orientation: When left and right is mentioned in this chapter,
it is with...

Chapter 4---Maintenance (Removal/Replacement)Model 230 Service Manual4-3
Figure 4-1.   Major components of the Model 230 Projector. 

Chapter 4---Maintenance (Removal/Replacement)
4-4Model 230 Service Manual
4.2  Projector Covers
Prior to removing either cover, review the chapter on Safety and adhere to all
warnings and cautions.
Figure 4-2   Rollbar Assembly.
To remove the front or rear covers (refer to Figure 4-2):
1.   Disconnect the projector power plug.
2.   Loosen the two pozidrive spring screws at the front of the front cover or the
rear of the rear cover.
3.   Tilt up the front or rear cover.
 CAUTION! Do not leave either cover...