Rollin'. Rollin'

[lkenney]

About a year ago I put in a new monitor and graphics card in the VF-0, sometime during the summer the monitor began to roll but we were in heavy production and runing the same programs os it did not bother us.

As the fall moved into winter I realized that the screen was not rolling any more. Taking gifts as they come, we did nothing to chase down the problem.

Day before yesterday the ctr began to roll again. I am in a research and development cycle now and not always being able to see the whole screen is troubling. It always pauses on the line you need to read and stays there until something distracts you and then when you get back to the VFC the line is just disappearing again.

Anyway I know that there are vertical adjustments on the CTR but thought I would inquire if that is the right approach or is ther something else I should be looking at.

The rolling does start about an hour after we fire the machine up. It is warmer now out side but the shop stays about the same tempature all the time thanks to 8 foot solid concrete walls. Tempature is usualling about 65 degrees +/- 3

Thanks for any ideas.

Eagle

[Geof]

Apply my first approach to problems like this....bang really hard with your fist on the side of the monitor housing. If this doesn't work hit it with a rubber hammer.

If neither of these work either put up with it or call your HFO and just say 'fix it'.

[tobyaxis]

Originally Posted by Geof Apply my first approach to problems like this....bang really hard with your fist on the side of the monitor housing. If this doesn't work hit it with a rubber hammer. If neither of these work either put up with it or call your HFO and just say 'fix it'.

This is a little brutal isn't it???

[Geof]

Originally Posted by tobyaxis This is a little brutal isn't it???

Not in the least.

A true 'Tradesman' knows the size of hammer to use and how hard to hit.

[tobyaxis]

Originally Posted by Geof Not in the least. A true 'Tradesman' knows the size of hammer to use and how hard to hit.

Yea, but your not indicating an Arbor Here. It's electronics You have been doing this too long Geof. Your getting mixed up on your applications.

[Geof]

Originally Posted by tobyaxis Yea, but your not indicating an Arbor Here. It's electronics You have been doing this too long Geof. Your getting mixed up on your applications.

No; many times 'electronic' malfunctions are due to something vibrating loose. All you need to solve these situations is a good bang in the correct direction.

I am sure Al The Man will back me up.

[tobyaxis]

Originally Posted by Geof No; many times 'electronic' malfunctions are due to something vibrating loose. All you need to solve these situations is a good bang in the correct direction. I am sure Al The Man will back me up.

I'll take your word for it, no reason to call Al. I do understand, I was just busting your chops

[Donkey Hotey]

Lots of old CRTs from that era had the same controls that old TVs had: brightness, contrast and the one it sounds like you're looking for--Vertical hold.

The trick is that some of them didn't make them immediately visible to the end user. one trick is that they used to mold the words into the plastic of the case in very small letters. The adjustments were often small screwdriver pots and were accessible through the cooling slots in the case.

I'll bet that if you open up the back of your control pendant and look very closely, you might find those adjustments on the back or side somewhere. Remember that they'll be part of the circuit board so it'll likely be near an edge (depending on whether the board is horizontal at the bottom, or vertical on one of the sides).

WARNING: there are some very high voltages inside a CRT--even when it's off. Radio Shack sells an inexpensive set of plastic screwdrivers that are made specifically for adjusting live CRTs. I recommend purchasing them. At very least, they won't destroy your monitor if they come in contact with a pair of incompatible circuits and they might save your life.

If none of those work, I've found that a dead-blow mallet works better than a rubber one.

[Mr.Xtreme]

A true 'Tradesman' knows the size of hammer to use and how hard to hit.

LOL. This is good stuff!

[mactec54]

Hi Geof

That sure is a slap in the face for a real tradesman a tradesman that uses this practice of beating on things if they don't work are called HACK'S

One part is correct a real tradesman know the size of hammer & what it's use is

We can all see Geof standing there at his machine with a line up of hammers at the ready to beat on his machine when it does not perform

[Geof]

Originally Posted by mactec54 Hi Geof That sure is a slap in the face for a real tradesman a tradesman that uses this practice of beating on things if they don't work are called HACK'S..

I have been called much worse than a HACK.

Is it okay if I just use my fist?

[awesome83]

I would take the cover off the monitor and put a fan blowing on it, and see if the problem goes away. Sounds temperature related. Adjusting it will not work, or it will work for a few minutes and then start doing it again. I have seen it be a problem with the video card in side the cabinet as well. Just make sure all the fans are working properly. There is no fan/van on the crt so i would start there.