Chosen Solution
I’m in need of the plastic Monitor Adjusting Tools for the Color Classic. Do you sell these or can recommend where I can obtain a set?
CRT discharge and adjustment tools are not in high demand, so it isn’t easy to find the specialized versions these days. They can still be found, but using precision plastic screwdrivers also works as well. However, before you begin to adjust the CRT you want to discharge it, so you aren’t starting out with a 15-25k charge waiting to get you! Best way to do this is a specialized tool but in a pinch I have done it with a well insulated electrician screwdriver (a bit more expensive, but cheaper then a hospital visit or death) and car jumper wires, and one hand behind my back. CRT MONITORS CAN AND DO KILL, SO BE CAREFUL! If you want to do it, electrical gloves are a good idea but not required. Once it’s discharged and you adjust it DO NOT DO ANYTHING in the area blind without making sure it’s off and discharged! The big thing is to find the service manual to figure out what each adjustment does, as the points are unlabeled in these AIO Macs as it is assumed a technician will do it, not us. You basically need it as getting it wrong means it’ll NEVER be right again without hours of tinkering. You often have to do this because the age of the CRT does not match the original alignment, so you need to compensate and adjust it when it gets too far out of sync. Read: If you keep having to do it, the actual CRT is in need of replacement and is worn out. Don’t buy a worn out school unit, it’ll fail like yours did. You want a nice one with low-ish hours and no burn-in.
no,not that i’ve seen.They should.
©2000 Thomas H. Lee, rev. May 31, 2007; All rights reserved 5.2 Height and Width If you want the screen to provide true WYSIWYG so that 1” on the display corresponds to 1” in real life, then its dimensions must be precise, or 4.75” x 7.11”, to be more exact (that’s 342x512 pixels at 72 pixels per inch). Unlike the other four adjustments, adjusting the width requires a hexagonal tool made of a NONCONDUCTIVE, NONMAGNETIC material. You can get these tools at places like Radio Shack, where a suitable one is sold as a tuner alignment tool. You can make a serviceable one out of a whittled down wooden chopstick or some similar material. If you use a cheap chopstick, you don’t have to do much work at all. Cheap chopstick wood is soft, so tapering it enough to allow gently jam- ming it into the core of the control is usually good enough. It will conform to the shape of the core well enough to do the job. The reason for the nonconductivity requirement is that the control is actually a ferrite core inside an inductor carrying large alternating currents. The AC field would induce large currents in a conductive tool, and make it get incredibly hot very quickly, to say nothing of invalidating the adjustment. At the same time, the increased strain that this places on the circuits could cause damage. So, wood or plastic it should be. Once you have the tools, you can save time by tweaking the height to 4.75” and then adjusting the width until diag- onal rows of raster dots are at right angles to each other. A piece of paper or a floppy disk or any other handy object with right angles will do as a good template for this purpose. If you don’t care about WYSIWYG, then just making the dots at right angles is good enough to preserve proper aspect ratio.
