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Figure 4-8. Horizontal/Vertical Deflection PCB.
4.12 Video Input Cards (VICs)
4.13 Video Amplifier PCB
Model 220 Service Manual
Chapter 4---Maintenance (Removal/Replacement)
The 4 types of Video Input Cards, RGB Standard, 4X RGB Mux (4
RGB Input), Quad Decoder, and HDTV (YPbPr) are all removed
and inserted in the same manner.
To remove a VIC:
1. Disconnect all video input connections from the VIC to
be removed.
2. Remove the 2 flathead screws that secure the VIC to
the projector rear panel.
3. Grasp the VIC connector bracket and pull the VIC out
(Wiggle the VIC a little, if necessary, to extract it).
The Video Amplifier PCB for the 3 CRTs is located under the
Electronic Module, on the bottom frame of the projector behind
and under the CRT assemblies.
To remove a Video Amplifier PCB:
1. Remove the front and rear covers (Section 4.2).
2. Tilt the Electronic Module up (Section 3.3).
3. Loosen the Green CRT Holder Ring (knurled knob-see
Figure 3-5). Read the Caution below this step before
removing the CRT Holder Ring completely. NOTE: The
holder ring should only be hand-tight. If it cannot be
removed by hand, a flathead screwdriver can be used
in the slots on the CRT Holder Ring (Figure 3-5) to help
4-15
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