Crt- I Need To Change All Three Crts, What To Do - Hitachi 46W500 Training

DP-3X THINGS YOUR SHOULD KNOW
Step 3:
Felt Like Plastic Piece
Glued (Double Sided Sticky
Tape) in place to the front of
the DVD disk tray.
Felt Like Plastic Piece.
(Double Sided Sticky Tape on Back.)
Part number for the SPACER is MN06355

(10) CRT- I need to Change All Three CRTs, what to do?

In a situation where it becomes necessary to replace all three CRTs, it may not be as big a job as first considered.
There are many times in which if a couple of First steps are followed, the job may be very easy thanks to Magic
Focus.
IMPORTANT: You must find the reason for the CRT burn ( If this is the reason for replacing all three CRTs at
once), before installing the new CRTs. Look for Deflection collapse caused by poor solder connections on the
Yoke Plugs, Convergence Yoke Plugs, Vertical Output IC, Drive Transformer and/or Flyback. Make sure the H
and V Sweep Loss circuit is functioning. Make sure the Yoke plugs are seated properly. Clean all Spark Gaps.
Pry off the caps on top of each spark gap and clean the contacts with a thin, fine sand paper. Reinstall the caps.
Solder all interconnections between the Signal PWB and the Deflection PWB.
THINGS TO REMEMBER:
If at least one of the defectives CRTs is properly set up (in relationship to geometry) then it can be used as a
guide for setting up the new CRTs. This means you have checked that the Center is in dead center and that the
lines running left to right and top to bottom are straight and all the grids are linear.
Magic Focus will be your biggest friend in the process.
If at all possible, do not remove all three defective CRTs at once. Leave the best adjusted CRT in place until the
other two new ones have been installed and aligned.
You most likely will not need an Overlay unless the set is already a mess related to geometry.
Figure 2
Figure 3
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