Panasonic PT- 56WX51CE, Руководство по обслуживанию

Страница: 75 / 126

- 13 -
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
(Figure 13).
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. (Figure 14)
Figure 14. CRT Replacement
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 (Figure 15).**
CAUTION: Do not remove the (4) CRT
lens screws.
8. Release CRT anode lead from CRT chassis wire
clamp and all other wires from holders.
9. Loosen a screw that secured the DY and remove it
from the CRT neck.
X-RAYS SHIELD
10. To insure X-Rays radiation protection, the lens
must be mounted in place at all times when power
is applied to the PTV.
Figure 15. CRT Replacement.
** CAUTION: Support the CRT Assembly
when loosening screws.
CRT Replacement
1. Remove CRT focus lens assembly (4 screws).
Figure 16. 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.
REAR VIEW
Optical Bracket
Screws
(6) places
Pull Down
Optical Bracket Cover
Lens
(4) Screws
When replacing CRTs, please see the part
number on the CRT to be replaced and order
with same part number on that CRT.