To check the high-voltage connector assembly The assembly uses three spring-loaded pins to contact the print cartridge: drum ground (callout 1), charging (callout 2), and developing roller (callout 3). Verify that the pins are not dirty or corroded and that the spring-loading action is functional. If the pins are dirty, clean them using isopropyl alcohol only. If they are damaged, replace the high-voltage connector assembly. Figure 98. Figure 99. EN 12 High-voltage connector assembly (right side) 2 32 High-voltage connector assembly (left side) Functional checks 205