HP 5100 Service Manual - Page 213

Table 36. Black page Possible cause Action Defective toner cartridge. Replace the toner cartridge. High-voltage contact springs Inspect and clean the high-voltage contacts. If damaged, replace the are dirty or defective. The contacts. high-voltage contacts are mounted on and above the dc controller PCA and protrude into the toner cartridge cavity. The dc controller is installed Remove the dc controller and check the connectors for damage. Reseat the incorrectly. If the low-voltage dc controller, being careful to fully seat the connectors. power supply or dc controller has been removed and replaced, it might not be seated correctly. The laser beam drive circuit Replace the dc controller PCA. or dc controller high-voltage circuit is defective (it is not supplying the correct negative voltage). Laser/scanner assembly is Replace the laser/scanner assembly. faulty (it is turning the laser on continuously). Connectors between the laser/scanner unit and dc controller are not seated correctly or are defective. Inspect and reseat the connectors. Replace the cables as necessary. Q1860-90918 Chapter 7 Troubleshooting 211