Vector G08 Series Faq page 12

G08 Vector Monitor Guide
CRT Neck Board
The CRT neck board is a 4" x 4" PCB with a large tube socket mounted directly in the middle of it.
It connects to the end of the monitor tube. The board controls the color guns of the tube.
The neck board has a few controls on it. One side contains a single "blue gain" control, while the
opposite side has "red cutoff", "red gain", "green gain", "green cutoff".
The color drive circuits accept a 4-volt maximum signal on the RGB inputs. The outputs drive the
three electron-beams in the CRT. Three neon glow-bulbs, NE-100, 101, and 102 act as spark
arrestors for the color-drive outputs to the CRT.
Most of the neck PCBs will have different Issues numbers screen into the top of the board and the
bottom of the board. It is unknown if there are any different revisions of the neck board. However,
this may be the one portion of the G08 monitor that was correctly designed, and you should have
little or no problems with the neck PCB.
Tube
This is large glass funnel shaped... it's a monitor tube for crying out loud! The tube is nothing
special. It is a 19VLUP22, which is also found in the Wells Gardner 6100 color XY monitors.
However, these monitors often came with a "tinted gel" covering or shield over the front of the
monitor to make the vectors look better.
A degaussing circuit is provided through D404, D405, and R400. The CRT is automatically
degaussed when R400 is cooled sufficiently to conduct current through the degaussing coil.
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