Crt Replacement - Mitsubishi Electric 50P-GHS63 Service Manual

·I
CRT REPLACEMENT
I
Removal of the CRT
Replace the CRT one by one. Each time one CRT is replaced, energise. After roughly adjusting the focus, the middle of the
screen and convergence, replace the CRT in sequence while confirming there is no big misconvergence on the screen.
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1. Remove the Rear Cover Assy. (Fig. 2)
2. Disconnect the Anode Lead Wires from the Flyback Transformer. Contact the Anode Lead Wires with the Radiator for
Transistor to discharge the residual charge inside the CRT. (Fig. 5-1)
3. Remove the Back Cover, Mirror Board and Option Board. (Fig. 2)
4. Remove 4 hex-nuts® retaining the Optical Unit. (Fig. 5-2)
PCB-DBF
Radiator for Transistor
f
PCB-MAIN
PCB-POWER SUB
Fig. S-1
LENS (B) LENS (G) LENS (R)
Front
®
®
Rear
Fig. 5-2
5. Remove 4 screws
@
retaining the Lens while supporting the CRT. (Fig. 5-2)
6. Remove 4 screws
©
retaining the CRT while supporting the CRT. (Fig. 5-3)
_ j
The CRT is removable from the Optical Unit in this condition.
Note : Never loosen the colored screws and screws with spring. This can cause a leakage of cooling liquid. If the
cooling liquid should leak and stick to the surface of the Lens, wipe it with a soft cloth. If the cooling liquid should
enter into the Lens, replace it.
7.
Remove the PCB-CRT, Deflection Yoke and Convergence Purity Assy (Green only).
Colored Screws
and Screws with
Spring
CRT
©
-8-
Fig. 5-3
Colored Screws and
Screws with Spring