Hughes Jvc 200 Projector Service Manual

Chapter 4---Maintenance (Removal/Replacement) 
2.   Remove the 2 flathead screws that secure the VIC to the 
projector rear panel. 
3.   Grasp the VIC connector bracket and pull the VIC out 
(Wiggle the VIC a little, if necessary, to extract it). 
4.12   Video Amplifier PCB 
The Video Amplifier PCB for the 3 CRTs is located under the 
Electronic Module, on the bottom frame of the projector behind and 
under the CRT assemblies. 
To remove a Video Amplifier PCB: 
1.   Remove the front and rear covers...

 Chapter 4---Maintenance (Removal/Replacement) 
7.   Place the Green CRT Assembly in a safe location on or 
against one of the other CRT Assemblies. 
8.   Disconnect the Red and Blue CRT Socket Connectors 
and gently lay them on the top of the Video Amplifier 
Board. 
9.   Disconnect the 3 connectors (push in slightly, squeeze 
the tabs, and pull out), J67, J68, and J69 from the Video 
Amplifier PCB. Move the cables out of the way. 
 
Figure 4-9.   Video Amplifier PCB showing breakaway CRT Socket...

Chapter 4---Maintenance (Removal/Replacement) 
and carefully cut the socket connectors away from the 
Video Amplifier PCB. The spacers between the CRT 
Socket Connectors can be discarded. 
4.13   Scan Reversal PCB 
The Scan Reversal PCB is located on the right side of the Electronic 
Module. 
To remove the Scan Reversal PCB: 
1.   Remove the projector rear cover. 
 
Figure 4-10.   Scan Reversal PCB. 
2.   Disconnect 7 connectors; J52, J54, J64, J65, J66, J50 (or 
J50A), and J100 (or J101). To remove,...

 Chapter 4---Maintenance (Removal/Replacement) 
Three CRT/Yoke Assemblies are located in the CRT Assembly area 
below the card cage. To remove a CRT/Yoke Assembly (refer to 
Figure 4-11): 
 
Red ILA 
Green ILA 
Metal-Framed 
Air Filter 
behind grille. 
CRT/Yoke 
Assemblies 
Air Filter on 
bottom. 
Cable Harness 
to Scan 
Reversal PCB Relay 
Lenses Rollbar Bracket 
CRT Lens 
Stopper Ring 
Blue ILA 
Video Amplifier 
PCB below 
CRTs
Figure 4-11.   View of CRTs, Relay lenses and ILA® 
Assemblies. 
1....

Chapter 4---Maintenance (Removal/Replacement) 
8.   CAUTION! For the Green CRT/Yoke Assembly only, 
this step is best performed with the Green CRT still 
connected to the CRT socket connector and the ground 
wire still connected from the CRT to the socket connector. 
This is because the Green socket connector is close to 
the rear of the projector and is easier to disconnect from 
the CRT after the CRT/Yoke Assembly is loose and is 
moved away from the rear. Be careful not to break any of 
these...

 Chapter 4---Maintenance (Removal/Replacement) 
 
Figure 4-12.  ILA® Assembly top view. The overlap screws shown are 
visible after the ILA® assembly is removed. 
4.   Loosen the two wingnuts at the top of the appropriate 
ILA® assembly (Figure 4-12). 
5.   Slide the spring clip at the top of the ILA® assembly 
backward (Figure 4-12). This will free the ILA® assembly. 
6.   Grasp the ILA®  assembly by its housing and slide it out.  
7.   Replace the ILA® in the reverse order from above. 
8.   Recheck...

Chapter 4---Maintenance (Removal/Replacement) 
5.   Loosen the wing nut on top of the Relay Lens mount (the 
bracket at the rear of the Relay Lens). 
6.   Remove the 2 long hex bolts at the front of the Relay 
Lens (shown in Figure 4-12). 
7.   Remove the 2 hex bolts at the rear of the Relay Lens 
(these bolts are level with the bottom of the Relay Lens 
and hold the bracket in place). 
8.   Remove the Relay Lens. Leave the Relay Lens Bracket 
and the CRT Lens Stopper Ring in the projector-do not 
send...

 Chapter 4---Maintenance (Removal/Replacement) 
NOTE: When changing from a zoom to a fixed lens, or vice 
versa, the ILA® Back Focus (Section 3.4) may need 
readjustment. 
4.18   Prism Assembly 
CAUTION! The removal of the Prism Assembly 
requires removing the Dichroic Mirror Assembly (X-Plate). In most 
cases this necessitates an optical realignment. HJT does not 
recommend performing this replacement in the field. Optical 
alignment is critical and requires projector power to be on. This 
results in an...

Chapter 4---Maintenance (Removal/Replacement) 
 
Figure 4-14.   Dichroic Mirror Assembly. 
8.   Remove the 2 hex bolts from the front of the Prism 
assembly (see Figure 4-15). 
 
Figure 4-15.   Prism Assembly mount. 
4-22  Model 200 Service Manual  

 Chapter 4---Maintenance (Removal/Replacement) 
9.   Remove the Rollbar assembly (2 pozidrive bolts/nuts on 
left side and two nuts on right side). Disconnect and label 
the 2 connectors on the hinge assembly for the shutter 
motors (1 in front and 1 in rear). Remove and label the 
jumper that connects the front interlock switch to the rear 
interlock switch. 
10. Remove the Rollbar Bracket that was holding up the left 
side of the Rollbar assembly. 
11. Remove the 3 ILA® asssemblies (Section 4.15). 
12....