Hallo
Ik heb bij repairfaq.org info opzezocht hoe je een CRT moest ontladen: Daar stond dit erover.
For the CRT, use a high wattage (not for power but to hold off the high voltage which could jump across a tiny 1/4 watt job) resistor of a few M ohms discharged to the chassis ground connected to the outside of the CRT - NOT SIGNAL GROUND ON THE MAIN BOARD as you may damage sensitive circuitry. The time constant is very short - a ms or so. However, repeat a few times to be sure. (Using a shorting clip lead may not be a bad idea as well while working on the equipment - there have been too many stories of painful experiences from charge developing for whatever reasons ready to bite when the HV lead is reconnected. More below.) Note that if you are touching the little board on the neck of the CRT, you may want to discharge the HV even if you are not disconnecting the fat red wire - the focus and screen (G2) voltages on that board are derived from the CRT HV
Hij zegt dat je moet ontladen naar Chassis ground en niet aan de signal ground op het main board, alleen zitten deze twee wel vaak verbonden met elkaar. Moet ik eeerst de GND van het mainboard ontkoppelen?
Is het veilig om een eigen ontlaadtool te maken, of raden jullie aan zoiets te kopen. Bedankt alvast
Groeten Sjaak