JVC 250 User Manual
Page 56
Chapter 5---Electronics
Model 250 Service Manual
5-1
5.0 Electronics
Contents
5.1 Safety............................................................................................................ 5-1
5.2 Introduction .................................................................................................. 5-2
5.3 System Controller PCB ................................................................................ 5-3
5.4 Video Processor PCB ................................................................................... 5-11
5.5 Raster Timing Generator PCB ..................................................................... 5-16
5.6 Horizontal Vertical Deflection PCB ............................................................ 5-21
5.7 Convergence Deflection PCB ...................................................................... 5-28
5.8 Scan Reversal PCB....................................................................................... 5-34
5.9 Video Amplifier PCB................................................................................... 5-43
5.10 CRT/Yokes.................................................................................................. 5-51
5.11 VICs ............................................................................................................ 5-58
Standard RGBHV VIC............................................................................... 5-59
Graphics Enhancer Plus VIC...................................................................... 5-61
4-Input (Quad) RGBHV VIC ..................................................................... 5-64
YPbPr VIC ................................................................................................. 5-67
Quad Standard Decoder VIC...................................................................... 5-70
Quad Standard Decoder/Line Doubler VIC ............................................... 5-72
5.12 Backplane PCB .......................................................................................... 5-74
5.1 Safety
CAUTION
!
Before performing procedures in this chapter,
review the chapter on Safety at the beginning of this manual
.
WARNING!!!
When performing procedures in this chapter
that require projector covers to be removed, wear high voltage gloves
(ANSI/ASTM 10,000 volt rated) when working near the CRTs, Arc Lamp,
or power supplies. Wear safety goggles (rated X5) when working
anywhere near the light path from the arc lamp or the projection lens.