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Troubleshooting the Printing System
7-61
Paper does not meet
specifications. The
paper moisture
content, conductivity,
or surface finish may
not work correctly with
the
electrophotographic
process.
Try a different paper lot (see
HP LaserJet Printer
Family Paper Specifications Guide
).
DC Controller
defective (low primary
voltage).
Replace the DC Controller.
High Voltage Power
Supply PCA defective.
Replace the High Voltage Power Supply PCA.
Transfer Roller
defective.
Replace the Transfer Roller.
See also “Blank Spots” on page 7-55.
Table 7-19. Faded Print/Bubbles
Possible Cause Action
No drum ground path. Check the contacts for functionality. If dirty, clean
using alcohol; if damaged, replace the High Voltage
Power Supply PCA.
Toner supply is low. Shake the cartridge gently to redistribute the toner,
or replace the cartridge.
Print Density is set
incorrectly.
Change to a darker setting and retry printing.
Table 7-18. Dropouts (continued)
Possible Cause Action