HIGH VOLTAGE RESISTOR PACK

摘要

PURPOSE: To provide a high voltage resistor pack having high breakdown strength against cracking, etc., at relatively low cost. CONSTITUTION: The voltage resistor pack is provided with a circuit substrate 3 having variable resistor used for focus voltage adjustment of CRT. Within this pack, the focus circuit making part with at least relatively high voltage applied thereto on the periphery of a circuit substrate 3 is encircled with a case 1 containing the circuit substrate 3 while a bulkhead 6 protruded from the inner surface of the case 1 is provided opposite to the outer wall 5 at a higher position than that of the circuit substrate 3. Through these procedures a trench 8 encircling at least the high voltage side of the circuit substrate 3 in a U shape is formed of the outer wall 5 and the bulkhead 6 of the case 1. Finally, the inner side of the bulkhead 6 is filled up with insulating resin 9 to bury the circuit substrate 3 in the insulating regin 9 for sealing the same 3.