Hughes JVC 220, Service Manual

Page: 114 / 140

Chapter 4---Maintenance (Removal/Replacement)
Figure 4-12. ILA
®
Assembly top view. The overlap screws shown are
visible after the ILA
®
assembly is removed.
4. Loosen the two wingnuts at the top of the appropriate
ILA
®
assembly ( Figure 4-12 ).
5. Slide the spring clip at the top of the ILA
®
assembly
backward ( Figure 4-12 ). This will free the ILA
®
assembly.
6. Grasp the ILA
®
assembly by its housing and slide it
out.
7. Replace the ILA
®
in the reverse order from above.
8. Recheck convergence, shading, ILA
®
bias and G2 and
readjust, if necessary ( User’s Guide, Sections 5.8,
5.10, 5.7, 5.9 ).
9. Recheck the ILA
®
Back Focus ( Section 3.4 ) and the
ILA
®
Overlap adjustment ( Section 3.8 ).
4.17 Relay Lens
To remove a Relay Lens ( refer to Figure 4-11 ):
1. Remove the rear cover ( Section 4.2 ).
2. Tilt up the Electronic Module ( Section 3.3 )
3. Remove the corresponding CRT Assembly behind the
Relay Lens that is to be removed.
Model 220 Service Manual 4-21