Hughes Jvc 220 Projector Service Manual

Chapter 3 Service Adjustments 
 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 Terminal Menu (normally in 
Accessories window), select Transfers/Send Text File, 
then select List...

Chapter 3---Service Adjustments 
 Boot Manager Ver y.y.0 (Service Mode 
Startup) 
Copyright (c) 1994-1996 Hughes-JVC 
Technology 
 Command: _ 
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...

Chapter 3 Service Adjustments 
3-18 Model 220 Service Manual 
  System software update successful 
 Command: _ 
The software update is complete. To restart the projector, type in 
the “reboot” command and press Enter. The projector will now 
restart with the updated System Software. 
3.12  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...

 Chapter 4---Maintenance (Removal/Replacement) 
4.0   Maintenance (Removal/Replacement) 
  Contents 
4.1   Introduction........................................................................\
......4-1 
4.2   Projector Covers......................................................................4-4 
4.3   Air Filters........................................................................\
..........4-5 
4.4   Arc Lamp Assembly.................................................................4-5 
4.5...

Chapter 4---Maintenance (Removal/Replacement) 
Tools required to perform removal and replacement of projector 
components and subassemblies are listed in Chapter 1, 
Introduction. 
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,...

 
Chapter 4---Maintenance (Rem
oval/Replacem
ent) 
 
Figure 4-1.
   Major components of the Model 220 Projector.
 
Model 220 Service Manual 
 
4-3
  

Chapter 4---Maintenance (Removal/Replacement) 
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 in the 
tilted...

 Chapter 4---Maintenance (Removal/Replacement) 
The power interlock switches for both covers are attached 
to each cover hinge. 
5.   When the Latch Levers are inserted into the holding 
slots, lift the cover off. Be careful not to brush against 
any of the internal components of the projector when 
removing the cover. If any undue resistance is felt, stop 
to locate the source before proceeding.  
6.   Replace the covers in reverse order from above. When 
replacing either cover, make sure the slot in...

Chapter 4---Maintenance (Removal/Replacement) 
To remove the Arc Lamp from the Arc Lamp Base Assembly 
(Refer to Figure 4-3): 
1.   Remove the front cover (Section 4.2). 
2.   CAUTION! Ensure all fans have stopped running. 
3.   Remove the lower-right-front-side panel (5screws). 
4.   Remove the Optical Shield (1 screw on top, 2 screws 
on lower right side, 1 screw at rear on bottom). 
 
Figure 4-3.   Arc Lamp Assembly  
5.   Remove the hex screw pin that holds the Arc Lamp fan 
to the housing. Swing the...

 Chapter 4---Maintenance (Removal/Replacement) 
7. Remove the 2 screws that secure the slide support 
bracket. Lift the support bracket upward to remove it. 
8.   Grasp the handle on the Arc Lamp and carefully slide it 
out of the housing. NOTE: Some earlier units may not 
be equipped with the handle. These units can be 
removed by gripping the circular cooling fins and 
pulling the lamp out. HINT: If the Arc Lamp is difficult to 
remove, use pliers and grasp one of the three heatsink 
screws and pull...