Grounding Wires, Screen Glitches & Hard Disks

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Joined: Dec 20 2003
Posts: 130

I took my Colour Classic apart and washed the plastics completely and now it looks much better. But during the process of moving the logic board and frame in and out, one cable came loose.

The cable is a green/yellow combo wire from the very back of the CRT. It looks like a clip. (Located in the small metal box at the end of the neck of the CRT assembly, it is short only about 2-3 inches long.) Apple's Service Manual doesn't have much information but it looks like it is a grounding wire. I hooked it up to the chasis and everything works fine so far.

Is it indeed a grounding wire? I hope by the fact the CC runs fine that that is indeed what it is.

Also, every now and then the screen shimmers. If you tap the side of the case the screen will shimmer or flicker briefly but every so often mine will. I'm leaving it plugged in for 24 hours in the hopes that the deguassing circuits will cure this. If it doesn't solve it..might it be a loosened some wires from the CRT?

It sure was fun opening it up and cleaning it, just I should have taken more carefull stock of parts and wires. One thing I need to do is get a can of compressed air, the dust inside this thing is immense.

My last question is regarding hard disks. I have an extra Quantum Atlas IV 9GB drive but I'm concerned about heating since the Atlas drives run very hot and are at 7200RPM & Higher. What kind of fan would fit inside and actually generate enough airflow for the drive? I have a Seagate Medalist which might be better suited but it just seems so much cooler to have an Atlas IV inside with 7200RPM. Wink

`Remiel

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Offline
Joined: Dec 20 2003
Posts: 180
The yellow/green is a groundi

The yellow/green is a grounding wire, so ground away!

TYhe shimmering can be due to 'iffy' solder joints - quite possibly in the little PCB on the end of the CRT - check that it's well located on the end of the CRT, but be careful not to break the vulnerable 'nipple' on the end.

Personally, I'd be cautious about hot HDs. There is some stuff on fans in the FAQ, but I'd go for a cheap, slow SCSI HD, as heat is the enemy of long life.

Stuart

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Stuart Bell,
Developer of the PowerCC site a long time ago.