Panasonic PT-47WX42CF, Service Manual

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Service Manual
Disassembly for service (continued)
Disassembly for CRT replacement
To facilitate CRT replacement, the complete CRT
mounting chassis does not need to be removed.
1. Remove the main chassis block from the cabinet.
See figure 15.
2. Remove the optical bracket metal cover (rear side)
by removing (6) screws from back, (2) screws from
top, and (2) screws from each side. See figure 17
& figure 18.
Figure 17. CRT replacement
Figure 18. Light box front view
3. Remove the defective CRT anode lead from the
high voltage distributor block that is mounted on
the flyback transformer. Discharge to CRT chassis.
4. Unplug connectors from the B-Board. See board
layout. B9 for red, B10 for green, or B11 for blue.
5. Unplug the defective CRT black DAG ground
connector from the CRT Board.
6. Remove the CRT Board from the defective CRT
neck.
7. Remove (2) screws from the defective CRT
housing. See figure 19.**
CAUTION: Do not remove the (4) CRT
lens screws.
Figure 19. CRT replacement.
** CAUTION: Support the CRT assembly
when loosening screws.
8. Release CRT anode lead from CRT chassis wire
clamp and all other wires from holders.
9. Loosen a screw that secures the DY and remove it
from the CRT neck.
Caution: To insure x-ray radiation protection, the lens
must be mounted in place at all times when
power is applied to the PTV.
CRT replacement
1. Remove CRT focus lens assembly (4 screws).
Figure 20. CRT assembly.
2. Lay CRT face down on a soft cloth.
3. Note position of yoke with centering tabs and
remove from defective CRT.
4. Remove CRT DAG ground from defective CRT.
Mount it on the replacement CRT exactly as it was
on the defective CRT.
Note: Replacement CRT is supplied with H.V. anode
lead attached.
5. Wire the anode lead wire.
REAR VIEW
Optical bracket
Screws
(6) places
Pull down
Focus pack
Optical bracket cover
Lens
(4) Screws