Hughes JVC 220, Service Manual

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Chapter 4---Maintenance (Removal/Replacement)
loosen it. Use care not to let the flathead screwdriver
slip out of the slot and possibly damage components.
Do not use a screwdriver or any other tool to tighten
this ring-it should be hand-tight only.
CAUTION!
This step is performed with the CRT Socket
Connector still connected to the Green CRT and the
ground wire still connected from the CRT/Yoke Assembly
to the CRT Socket Connector. This is because the Green
CRT 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 of the projector. Use extreme care not to break any of
these connections when removing the CRT/Yoke
Assembly.
4. Carefully remove the Green CRT/Yoke Assembly by
sliding it backward and upward as far as possible
before disconnecting the Green CRT Socket Connector
from the CRT neck. Use care to avoid bumping the
CRT as it is being removed and to avoid breaking any
of the wires that connect from the CRT Socket
Connector to the Video Amplifier.
5. Move the Green CRT/Yoke Assembly away from the
rear of the projector, then disconnect the Green CRT
Socket Connector and the ground wire between the
CRT/Yoke Assembly and the CRT Socket Connector.
NOTE: It may be helpful to perform this step with a
partner-one person to hold the CRT/Yoke Assembly
firmly and the other to remove the CRT Socket
Connector and the ground wire.
6. Gently lay the Green CRT Socket Connector on the top
of the Video Amplifier PCB.
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.
4-16 Model 220 Service Manual