Mitsubishi Picture Tube Leak

No Leo..!!!
36 yrs here in buisness having moved dozens and dozens
of Pro sets in and out of houses.
Sounds to me like somebody trying to Hit up an insurance company.
kip

--
"Watch the return E-Mail addy its false"
"Leonard G. Caillouet" <lcaillo_ns_@devoynet.com> wrote in message
news:fwjgb.24144$wC1.19940@bignews3.bellsouth.net...
No magic, just observation, logic, and experience.

Your statement "No way was it done in Moving" seemed to be based more on
clairvoyance than any of the above. It suggested a simplistic view of
these
problems and a dangerous assumption. One must be much more careful with
some RPTVs than people assume when moving them. I have seen quite a few
Mitsubishis(VZ series chassis) and RCA (PTK195 chassis) that had coolant
leaks shortly after being moved.

Leonard Caillouet


"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$smuamh$l16$1@newsfeed.niagara.com...
Gee !! I wish I had your Magic Ball.

kip

--
"Watch the return E-Mail addy its false"
"Leonard Caillouet" <lcailloNOSPAM@devoynet.com> wrote in message
news:L6_fb.40705$AH4.19236@lakeread06...

"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$8dcamh$qt4$1@newsfeed.niagara.com...
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
Click to expand...
 
Read the posts. These sets have an inherent design tendency to do this when
moved.

We have experimented with dud tubes in warranty jobs and can get them to
leak with surprisingly small bumps on the frame supporting the coolant seal.
The seem to stay sealed after that on tubes not used in sets. When run with
thermal cycling in a set I am not sure because I have never been willing to
risk putting one back in the field.

Your years of experience notwithstanding, some of us have done dozens of
repairs on these. As I said, your assumption that there is not a potential
problem moving some RPTVs is a dangerous one. Any of the sets I mentioned,
and some others from a variety of manufacturers, should be handled very
carefully.

Whether the problem is one for the movers insurance or for the maufacturer
is a good one. I have a customer with that situation right now. We give
our experience and honestly report on what we find to everyone concerned.
Typically, my feeling is that the manufacturers need to step up due to the
poor design.

Generally, Mitsubishi has been very good about helping customers with these
problems. I'm not sure about other manufacturers. I have heard very
differing reports on most of the others.

Leonard Caillouet

"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$ewqcmh$33f$1@newsfeed.niagara.com...
No Leo..!!!
36 yrs here in buisness having moved dozens and dozens
of Pro sets in and out of houses.
Sounds to me like somebody trying to Hit up an insurance company.
kip

--
"Watch the return E-Mail addy its false"
"Leonard G. Caillouet" <lcaillo_ns_@devoynet.com> wrote in message
news:fwjgb.24144$wC1.19940@bignews3.bellsouth.net...
No magic, just observation, logic, and experience.

Your statement "No way was it done in Moving" seemed to be based more on
clairvoyance than any of the above. It suggested a simplistic view of
these
problems and a dangerous assumption. One must be much more careful with
some RPTVs than people assume when moving them. I have seen quite a few
Mitsubishis(VZ series chassis) and RCA (PTK195 chassis) that had coolant
leaks shortly after being moved.

Leonard Caillouet


"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$smuamh$l16$1@newsfeed.niagara.com...
Gee !! I wish I had your Magic Ball.

kip

--
"Watch the return E-Mail addy its false"
"Leonard Caillouet" <lcailloNOSPAM@devoynet.com> wrote in message
news:L6_fb.40705$AH4.19236@lakeread06...

"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$8dcamh$qt4$1@newsfeed.niagara.com...
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
Click to expand...
 
A magic ball isn't required.
Experience is.
At our shop we do exactly as Leonard described and even take it one step
further by adding a drip tray just under the CRT's.
Similar to what Hitachi installs on it's sets from the factory.
All it takes is a piece of plastic gutter down spout material cut
lengthwise.

Good Luck,
Bill Jr




"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$smuamh$l16$1@newsfeed.niagara.com...
Gee !! I wish I had your Magic Ball.

kip

--
"Watch the return E-Mail addy its false"
"Leonard Caillouet" <lcailloNOSPAM@devoynet.com> wrote in message
news:L6_fb.40705$AH4.19236@lakeread06...

"john" <va3mmTAKEOUTTHIS@niagara.com> wrote in message
news:newscache$8dcamh$qt4$1@newsfeed.niagara.com...
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
Click to expand...
 
"Bill Jr" <bill@nospam.usa2net.net> wrote in message
news:EBmgb.65833$Of2.2494903@twister.tampabay.rr.com...
A magic ball isn't required.
Experience is.
At our shop we do exactly as Leonard described and even take it one step
further by adding a drip tray just under the CRT's.
Similar to what Hitachi installs on it's sets from the factory.
All it takes is a piece of plastic gutter down spout material cut
lengthwise.

Good Luck,
Bill Jr
Click to expand...
It is amazing how so many of us come up with the same solutions. I have
also begun putting a similar diversion channel in the sets to divert any
potential leaks off of the board.

BTW, glad you got to a resolution on your Zenith, Bill.

Leonard Caillouet
 
Leonard Caillouet
Click to expand...
Thanks for everyone's help. I am still waiting to hear back from
Mitsubishi, but they did call me for more information. So they are at
least looking into it. I think it is great that a company truly
stands behind the common problems and hope that they will help me out.

As for the comment about "Why ask here?" Well, I didn't realize it
was a common problem until I posted out here. Once I heard that, I
started asking around and found that my brother's unit had the same
issue.

Thanks,
Mark
 
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