Hi,

I've been having troubles with an Eizo T766 19" CRT; the blue and red gun
occasionally turn fully on, most notably when tapping the neck board, with
visible verticle retrace for that color. At first I thought I narrowed the
problem down as being inside the CRT, because I desoldered the offending guns'
pins from the neck board, and the problem remained. However, it has come to my
attention that the problem could also very well be in the CRT socket, the
spark gaps to be precise. The "Notes on the Troubleshooting and Repair of
Television Sets" article on www.repairfaq.org says this about it:

Except for the high voltage to other places, the short may actually be
located in the CRT *socket* or even on the CRT neck board, probably in the
spark gap(s) for the problem pins. Remove the socket and test between the
suspect pins on the CRT itself. If the CRT itself is fine, the spark gaps
should be inspected and cleaned/repaired and/or components replaced.

I don't know a lot about CRT's, and their sockets, so I've got a question. What
are the spark gaps? Are those the holes next to the pin connectors? The socket
for my tube is shown in [1]. And how do I repair them (if they are what I
think they are, they are difficult to reach).

The short does not measure with the continuity tester on my DMM, and not even
with the 200 MOhm resistance tester (neither with the socket connected to the
CRT, or hanging loose, so it's difficult to test if the socket is actually the
cause. But if it were, would I measure a short between the pin connector and
ground?

[1] http://www.halfgaar.net/posts/2008-05/eizo-crt-socket