Mitsubishi WS-73909 Service Manual download pdf (Page 18)

Page 18

MODELS: WS-55859 / WS-55909 / WS-65869 / WS-65909 / WS-73909

CRT REPLACEMENT

1. Removal of the CRT

Caution! High voltage should be completely discharged prior to CRT removal.

Since The CRTs receive high voltage from the HV Block, discharge

by shorting the open end of the respective high voltage cable to

chassis ground.

Note: Refer to the Cabinet Disassembly Procedures when performing steps 1 through 4.

1. Remove the Speaker Grille, Front Board, and Screen Assy.

2. Remove the Back Board.

3. Remove the Anode Lead Wire from the CR Block.

4. Remove the PCB-CRT.

5. Remove 4 hex-screws "a" retaining the Optical Unit. [Figure 5-1]

6. Remove 4 screws "b" retaining the Lens.

Note: DO NOT loosen the RED screws. Doing so will break the seal between the

C-Element and the # 6 Lens, causing leakage of the CRT Coolant.

7. Remove 4 screws "c" retaining the CRT. [Figure 5-2]

8. Remove the Deflection Yoke from the neck of the CRT. [Figure 5-7]

Figure 5-2

Figure 5-1

Note: The 4 spring-loaded screws shown

in Fig 5-2 and labeled as "DO NOT

REMOVE", should not be loosened

under any circumstance. Doing so

will break the seal between the

CRT and the CRT-Spacer, causing

leakage of the CRT Coolant.

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Mitsubishi WS-73909 Service Manual Page 18