HP LaserJet 6p/mp Service Manual - Page 137

High-voltage power supply check The High-Voltage Power Supply PCA provides the necessary voltages for the electrophotographic processes. A method for verifying the high-voltage system is given in the table below. Table 7-4 High-voltage power supply check Check Action Toner Cartridge Connection Points Visually inspect the three connection points on the underside, right end of the toner cartridge. If they are dirty or corroded, clean the connections. Use alcohol only. If damaged, replace the toner cartridge. (See Figure 7-5 below.) High Voltage Connector Assembly This assembly uses spring-loaded pins to contact the toner cartridge. (See Figure 7-6 on the following page.) Verify that the pins are not dirty or corroded and that the spring-loading action is functional. If the pins are dirty, clean using alcohol only; if damaged, replace the High Voltage Connector Assembly. 1 2 3 Figure 7-5 Toner cartridge high-voltage connection points (1 of 2) 1 Charging 2 Drum Ground 3 Developing Roller EN Troubleshooting checks 135