I always used a plain cable without resistor, but it seems that this can (not so rarely) cause damages.
So I'm making myself a new cable with several 1 MOhm 2W resistor... still investigating how many I should put in series
Decades' worth of Apple service info, forum postings, etc. all strongly advise that the CRT be discharged to the ground lug on the mounting ear, else the rest of the system gets damaged. Person with the dead 128k doesn't specify how he did it, entirely possible the damage is down to user error.Do you think it would be better if I waited a while until I discharged it to reduce the discharge amount?
This is the message I really needed. Thank you very much for all the help everyone! I'll go ahead and buy the parts and do the repair. I'll update you guys when it's done.Decades' worth of Apple service info, forum postings, etc. all strongly advise that the CRT be discharged to the ground lug on the mounting ear, else the rest of the system gets damaged. Person with the dead 128k doesn't specify how he did it, entirely possible the damage is down to user error.
I'd implore you all not to overthink discharging the CRT in the Compacts, it isn't a particularly nuanced procedure and not necessarily the death trap some people make it out to be. Chances are you'd be putting yourself more at risk by experimenting with series resistor values (the resistors used in such discharge tools are often specialized for this task). Get a clip lead of reasonable enough quality, make sure it's clamped solidly to the screwdriver/ground lug, and put one hand behind your back, if you feel like it.
If you have one of the later flybacks and the machine's sat for a while, you likely won't hear a pop, even without the resistor.
Yours seems a fair and informed advice, but it's not easy not overthinking when you hear about risks of damaging your beloved old Mac...I'd implore you all not to overthink discharging the CRT in the Compacts
I can agree with this.but it's not easy not overthinking when you hear about risks of damaging your beloved old Mac...
I usually discharge flybacks to the ground of my home electrical system. First, I've never felt secure to discharge them on the metal chassis; second, a lot of old tv's from the fifties/sixties were built in wood/plastic, no metal frames.....Decades' worth of Apple service info, forum postings, etc. all strongly advise that the CRT be discharged to the ground lug on the mounting ear, else the rest of the system gets damaged. Person with the dead 128k doesn't specify how he did it, entirely possible the damage is down to user error.
I'd implore you all not to overthink discharging the CRT in the Compacts, it isn't a particularly nuanced procedure and not necessarily the death trap some people make it out to be. Chances are you'd be putting yourself more at risk by experimenting with series resistor values (the resistors used in such discharge tools are often specialized for this task). Get a clip lead of reasonable enough quality, make sure it's clamped solidly to the screwdriver/ground lug, and put one hand behind your back, if you feel like it.
If you have one of the later flybacks and the machine's sat for a while, you likely won't hear a pop, even without the resistor.
That is exactly what this person did:But anyway, discharging to the ground lug NOT the chassis is the key part to follow there.