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146 Troubleshooting/Maintenance
C4224-90962
High-voltage power supply check
The high-voltage power supply PCA provides the necessary voltages for the
electrophotographic processes.
Checking the toner cartridge connection points
Visually inspect the three connection points on the underside, right end of the toner
cartridge: charging (callout 1), drum ground (callout 2), and developing roller (callout 3). If
they are dirty or corroded, clean the connections, or, if they are damaged, replace the toner
cartridge.
NOTE: Use only alcohol to clean the connections.
Figure 5-5 Toner cartridge high-voltage connection points
Checking the high-voltage connector assembly
The assembly uses three spring-loaded pins to contact the toner cartridge: charging (callout
1), drum ground (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 alcohol only. If they are damaged, replace the high voltage connector assembly.