Anilam 1100 CRT help!

[davejeske]

Hi folks,
I'm new to this forum so a quick introduction may be in order. I am a mechanical engineer who has a "real job" but I also run a side business manufacturing woodworking hand tools. I also very much enjoy manufacturing and machinery and have managed to stuff my single stall garage with way too much iron. Most of my equipment I picked up at auctions or garage sales and it all needed or needs work. I have a 40's vintage Logan 9" lathe, 15" Walker Turner drillpress, 20" Clausing drill press, 16" Walker Turner 2-speed bandsaw, Full size Table saw, old DeWalt 9" Radial Arm Saw, Two old wood lathes, a couple 10" Baldor grinders and a microwave oven! My most recent find was a Titan II Bridgeport knock-off equipped with Anilam series 1100 2-axis CNC controls. I have it up and running and am learning to program it - great fun. However, the other night the CRT went south and the display collapsed into a vrtical line. All of the control functions still worked fine but I could not read the display. I took the cover off and patched in an old computer CRT so I am running again, however, I would like to fix the old tube if possible. Anyone have any experience with this kind of thing? My father-inlaw said it was the horizontal oscilator.?? Any help would be appreciated. Anilam wants $675 for a new CRT! Ouch.

Thanks,
Dave

[Evan]

It definitely is something in the deflection circuit but if you can see a vertical line then you still have high voltage. That means the horizontal osc is still running. More likely the problem is in the horiz deflection amplifier. Not an uncommon problem and often fairly easy to repair. Usually a pair of power transistors and they aren't very critical as to specs.

[bdarin]

Could also be the yoke.

[bernie]

Evan is correct (again). It will be a transistor or 2, probably a few dried out caps and maybe a diode as well. Really not too difficult to repair.

[davejeske]

Thanks for the help. Should any electrical engineer or technician be able to track the faulty components down? Or is there a way for me to check this out? I have a good meter and am not shy about working on things. What do I look for? I understand the high potential voltage that can be stored.
Thanks,
dave

[Evan]

Dave,

Welcome aboard BTW. I don't suggest that you try to repair it yourself unless you are well aquainted with high voltage circuitry and the serious hazards involved. In particular, TVs and monitors can kill you in a heartbeat. I have many years experience working on high voltage equipment and still I refuse to do monitor repairs at my computer store. It just isn't worth the risk. At the price for an OEM replacement it is certainly worthwhile having the old one repaired.

[davejeske]

Thanks for the advice Evan,

I will search out a qualified repair person. It wouldn't do me much good to be dead now would it? Who would fix all my old machines?

Dave

[Evan]

"Who would fix all my old machines?"


Oregon isn't that far from here...

[sandman2234]

Guess the next post will be telling him to work on the monitor, so you can make the trip to Oregon? Just kidding!!! It is too far for me to make that trip.
David from jax

[mayfieldtm]

I used to fix TV's and Computer Monitors before the prices dropped down to throw-away levels.
I found that about 25% of the time with all repairs, that the problem is either a cold solder joint or a connections problem of some sort.

Tap around on various parts and the circuit board with something insulated and watch the response. You might get lucky. Just don't zap yourself.

If the display is mounted where it can get vibration (even a small amount) from the machine, this can cause such failures over time.

Tom M.