[TECH] WG K4600 Series Monitor Woes
Robert Spelman
I am having some difficulty with my WG K4600, and could use some advice.
When I power on my Galaga game, the graphics on the extreme right-hand
side are "running" down the screen - approximately where the first game
level "shield" is displayed. All graphics are affected, sprites and text
alike.
Troubleshooting done so far:
- Switching the game boards out with known good ones makes no
difference, so I surmise this is a monitor problem.
- I installed a Bob Roberts cap kit without electrocuting myself or
burning my house down. The graphics are still running down the right
edge.
- I adjusted the vertical size to "narrow" the screen, with the result I
have somewhat squished graphics that STILL run down the right edge.
I have not tried to switch video cables from the board to the monitor
with my UR Galaga (this is a mini I'm working on) since the UR uses a
completely different monitor. I don't THINK it would make any difference
in this case.
So, what would be causing my problem, and how can I fix it? Keep in
mind, my experience with installing the cap kit last night was the first
time I'd ever worked on a monitor.
I have one other "trouble" - the top edge of the screen is fine, but the
bottom edge is lower than I would like it to be. I've been told the
doohickey that controls the horizontal size is a coil on this type of
monitor, and that it can be adjusted with a screwdriver. The only thing
I've found that remotely matches this is a paper tube about 1/4" wide,
maybe 1 1/2" long, with red wire wrapped around it and 2 leads going on
to the main monitor board. Unfortunately, the paper disintegrated when I
tried to get to the "hex"-looking thing inside of it to somehow adjust
it. The wires are still attached, so I put it back where it was resting
as best as I could. The monitor doesn't look any different so I don't
think I hurt anything very badly. I think I may need a new one of these
things - name and part number and someplace I could order it from would
be helpful as well, plus instructions on how to adjust it?
I hate to sound like an idiot, above, but I'm learning as I go along,
and have far more sympathy for the computer-illiterate than I did before
starting my arcade repair adventure.
Hudson Valley Amusement
from the back of the monitor it is the plug in board on the right. There is a
small red pot encased in metal. It can be difficult to adjust when installed.
You will need a long thin screwdriver (flathead) to adjust it. I recommend
removing the whole plug in board to see how small of a screwdriver you need,
then reinstalling it and adjusting it. There is a small hole in the right part
of the metal frame of the monitor chassis to put the screwdriver thru to adjust
this. Good luck.