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Leonard Caillouet
 
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Default Mitsubishi Picture Tube Leak


"john" wrote in message
.. .
Maybe moving brought on the leaks which were already started but
No way was it done in Moving...


What a silly statement. Of course it was done in moving. That does not
mean that the mover should necessarily be liable. The basic design is less
than optimal.

It would be more correct to say that moving brought on a leak, but that the
integrity of the seal was marginal and anything that slightly jarred the
CRTs would likely have had the same result. I have seen several of these
that had no problems until they were moved, then when examined carefully the
coolant had migrated completely from the tubes to a small spot on the board
and corrosion had started. Sometimes you can't even find where it leaked
from with the CRT removed.

The basic problem is that the frame that holds the crt to the coolant
chamber is too flexible to maintain even and sufficient pressure on the
seal. Many never leak. All are marginally sealed. When we do one that
Mitsubishi is paying for, we don't replace the tubes, we reseal them using a
very thin film of RTV on both sides of the rubber gasket. I believe this to
be a better seal than even a new tube from Mitsubishi.

Leonard Caillouet