Hughes JVC 200, Service Manual

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Chapter 4---Maintenance (Removal/Replacement)
NOTE: For the remainder of this procedure refer to Figure
4-6 above.
4. Disconnect the 3 CRT anode cables.
5. Disconnect P44-G2 Out (at the middle-front of the
HVPS).
6. Unsnap the cable clamp at the top of the HVPS.
7. Remove the anode cables and the P44 cable from the
cable clamp.
8. Disconnect P45 (“Control”) at upper left of HVPS.
9. Disconnect and label the 3 Focus cables. The square
tabs on these cables (see Figure 4-6) may have to be
lifted up by gently prying with a flathead screwdriver.
10. Remove all cables from the slot in the cable guide at
the left side of the HVPS.
11. Verify that all plugs and cables are removed and out of
the way so the HVPS is free to be removed.
12. Loosen (do not remove) the 2 pozidrive screws (at the
bottom of the HVPS) that secure the HVPS metal
housing to the projector.
13. Remove the 2 pozidrive screws that hold the top of the
HVPS metal housing to the projector frame.
14. Grasp the HVPS at the bottom and lift upward and
outward so that it slides away from the bottom screws.
15. Reinstall the HVPS in the reverse order from above.
When reinstalling, be sure that the HVPS slides over
the bottom screws
and the lip at the top of the projector
frame. Make sure each anode cable “snaps” back into
its receptacle. The receptacles are about 2” inside the
hole where the cable fits into. Also, be sure the rear
flap on each focus cable connector snaps over the
square socket securely-wiggle the connector a little to
make it fit over.
16. Replace the HVPS cover. After the HVPS is replaced,
recheck CRT Mech Focus, Yoke Alignment, G2, and
Electronic Focus.
17. Replace the projector covers.
4.8 Raster Timing, System Controller, Video Processor
PCBs
All electrical connections to the Raster Timing Generator, System
Controller, and Video Processor boards are routed through the
backplane board. There are no connectors to remove.
4-10 Model 200 Service Manual