DANGER - wrong info. I was fixing BW sets in 1951, later went to school for RCA COLOR do not, NOT think for a minute that the below info is safe!!!
Any well built CRT will hold a 20,000 Volt charge on the 2nd Anode for weeks!!! Never take a chance with this voltage, just discharge it and go on! Find the wire that goes to the side of the bell of the CRT and using a simple 10 inch long plastic handle flat blade screwdriver carefully insert it under the 2 inch rubber insulator cover so as to make contact with the metal button it is covering ----= a minor wise point here - if you are ever in your car and a storm causes electric overhead wires to fall on the car and you can see sparks outside -- DO NOT MOVE, DO NOT GET OUT OF YOUR CAR - you are in no real danger provided your not a part of the ELECTRIC CIRCUIT - the metal of your car is ELECTRIFIED but the tires will prevent it from burning since they act as a nice insulator. The way out of this is NOT TO STEP OUT as that will complete the electrical circuit and you will be toast. BUT if you can jump out BEING SURE YOUR TOTALLY IN THE AIR then you can exit the car with no problems. This is the same way RADIO AND TV TOWERS are serviced during the time they are being fed live signals = you MUST JUMP ON and do your service - change the bulbs or what ever, then JUMP OFF. Costs way too much to turn off the transmitter, just jump, done it 1000 times. BACK TO FIXING THE MAC CRT; Stick the screwdriver under the rubber cap so as to make contact with the metal wire of the 2nd anode, now your going to need a simple jumper attached to the METAL CHASSIS and using one with alligator clips makes this very easy, but you can do it by just wrapping several turns of small 22 gage wire round any easy metal part of the chassis, then wrap some of this exposed wire around a SECOND SCREWDRIVER, now touch one driver to the other and you will see and hear A NICE BIG SPARK AND A POP. Just hold the wired drivers touching each other for a few seconds, YOUR DONE. The CRT is now discharged and is of no further danger. Now, if your a kid dad, attach the alligator clip to the 2nd anode and a long well insulated wire terminated in a metal screwdriver. Now you can find the best and biggest night crawlers (worms used for fishing) and lizards and snakes, all will get shocked by the charge from the 2nd anode of the CRT. If the voltage goes to low to arc, turn the Mac on for a minute to recharge the power and continue fishing. Have fun, JML --- On Wed, 12/1/10, Bruce Johnson <[email protected]> wrote: From: Bruce Johnson <[email protected]> Subject: Re: Ungrateful Apple abandons older Mac service To: [email protected] Date: Wednesday, December 1, 2010, 4:26 PM On Dec 1, 2010, at 5:09 PM, Tom wrote: > And do you really build computers so dangerous that even an Apple tech > is afraid to open it up? Yes, large CRT's can be very dangerous to work on. Televisions, monitors and all-in-one systems like the eMac need special precautions to be taken. This has been discussed numerous times on this and the iMac lists. IN general leave the thing unplugged for at least 12 hours (and preferably longer), and use care don't go poking aroiund anything plugged into the CRT. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
