JVC Model 200 service manual View of CRTs, Relay lenses and ILA Assemblies

Chapter 4---Maintenance (Removal/Replacement)

Three CRT/Yoke Assemblies are located in the CRT Assembly area below the card cage. To remove a CRT/Yoke Assembly (refer to Figure 4-11):

Blue ILA

Rollbar Bracket

Metal-Framed Air Filter behind grille.

Air Filter on bottom.

Red ILA

Green ILA

CRT Lens

Stopper Ring

Relay Lenses

Cable Harness to Scan Reversal PCB

CRT/Yoke

Assemblies

Video Amplifier

PCB below

CRTs

Figure 4-11.View of CRTs, Relay lenses and ILA® Assemblies.

1.Remove front and rear covers (Section 4.2).

2.Tilt the Electronic Module up and lock it in place (Section 3-3).

3.Remove the two pozidrive screws from the top of the High Voltage Power Supply (HVPS) cover (Figure 4-5)and loosen the one screw at the bottom of the cover (do not remove the bottom screw-it is difficult to replace-the HVPS will slide up and over it).

4.Remove the CRT anode cable (for the CRT that is to be replaced) from the HVPS.

5.Disconnect the Yoke plug and cable harness from the Scan Reversal PCB for the appropriate CRT (see Figure 3-7).

6.Remove the wires from the cable clamp for the CRT/Yoke Assembly that is being removed.

7.Loosen the CRT Holder Ring (knurled knob in Figure 3-5). NOTE: The CRT Holder Ring should be only hand-tight. If it cannot be removed by hand only, a flathead screwdriver can be used in the slots on the CRT Holder Ring to help loosen it. Do not use a tool of any kind to tighten this ring- it should be hand tight only.

Model 200 Service Manual 4-17