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This is a Cub monitor which I'm going to strip for cleaning, and
also point out some of the internal features.
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To remove the back panel, unscrew and remove the seven screws highlighted
in this image. Ensure that the monitor is totally disconnected from the
mains supply first. Also if it has just been used, leave it to stand for
an hour or two just to be sure all the capacitors have discharged. Be safe.
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With the fixing screws removed, the back panel can be laid down
flat. Be careful to ensure you don't stress any of the cables connecting
the back panel to the main PCB.
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To remove the top cover, first unscrew and remove the two screws
highlighted in this image. The top cover can now be pulled towards the
rear of the unit then lifted off.
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This image shows the monitor stripped ready for a clean.
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Clean the internals with a vacum cleaner hose and small paintbrush.
To much dust on electrical components makes them run hotter, so the cleaner
the better.
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Whilst we are inside, take a moment to make sure the board attatched
to the neck of the tube is firmly in place, they can work loose. So, with
a hand on the front screen, use your other hand to press the board upto
the tube.
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This image shows the location of the three internal fuses. First
stop for diagnosing a dead monitor. F1 and F2 are 2 amp and F3 is 1 amp.
Always replace with the same type and rating of fuse.
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These are the picture trim controls. There is no need to touch
these unless you have a picture defect.
Finally re-assemble the monitor and enjoy what was the best display
technology of its time.
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