🚀 go-pugleaf

In <ueengm4r25.fsf@auda.mlfarm.com> ron@mlfarm.com (Ronald Florence) writes:

>One of our monitors, a Sun/Sony 16-inch color multiscan, model
>365-1130, occasionally arcs while in use.  It has happened twice, at
>about a one week interval: a snapping sound, an apparent flash on the
>screen, the display goes black for an instant, then is fine.

>Is there a cure we can apply for the arcing?  I hate paying the
>freight to ship these monsters around.  Thanks,

Sounds like now is a good time to get your monitor looked over by a service
agent. 

Those flashes are most likely stray arcs of EHT, and some possible reasons
could be that the EHT is taking a different path other than through the
anode of the tube in your monitor is that either the inside of the monitor
is very dirty and providing a shorter conductive path to ground some of the
time, and/or there's an intermittent fault which is causing the anode
connection to break somewhere. There are probably a few other likely causes
as well.

If you don't want to send the monitor away, and you know someone who is
experienced in monitor or TV servicing, ask them to have a look. They'll
probably look at all the components in the EHT section, check for problems
with the mounting, soldering, etc. of these components, and check the
connection from the output of the EHT transformer to the anode of the tube
is not becoming intermittently faulty. 

What other symptoms are there? Does the arcing occur randomly, or a certain
time after switch-on? Has the inside of the monitor ever been cleaned out?
Depending on the environment, if it's dusty and more than a little humid
this might be a contributing factor. 

Regards,

Craig.
-- 
            Craig Dewick. Send email to 'cdewick@lios.apana.org.au'
   Point a web browser at 'http://lios.apana.org.au/~cdewick/sun_ark.html' to
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