Anode - Discharge the anode before working inside the unit. Some monitors and some Macintosh computers containing CRTs have a bleeder resistor on the anode that drains the charge when the power is turned off. Nevertheless, in case the resistor fails and leaves the anode fully charged, you must perform the discharge procedure. Isolation Transformer - When performing live adjustments, use an isolation transformer between the monitor power cord plug and the power outlet. This setup decreases the hazard of electric shock in case you were to accidently touch a hot component or chassis.
Isolation transformers are available at some stores that specialize in electronics components.
Select one that is rated to handle the products you service. Normally, the anode aperture has a connector plugged into it. When a CRT is replaced, the anode connector is removed, exposing the anode aperture. CRT Live Adjustment Rules Plastic Adjustment Tool - When performing live adjustments, use a plastic adjustment tool or insulated screwdriver only. Live Components - When adjusting a live monitor, never touch the components listed below.