EXP Computer C4077-90960 - Manual (Page 304)

Possible Cause Recommended Action
1. Single sheet of paper defective. Try reprinting the job.
2. Paper does not meet specs. 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).
3. DC Controller defective (low primary voltage). Replace the DC Controller.
4. High Voltage Power Supply PCA defective. Replace the High Voltage Power Supply PCA.
5. Transfer Roller defective. Replace the Transfer Roller.
Possible Cause Recommended Action
1. Toner cartridge not seated properly. Remove the cartridge and reinsert it.
2. Toner cartridge is damaged. Inspect the toner cartridge for a scratched or
streaked photosensitive drum. Clean printer
(see Chapter 4) and replace cartridge.
3. Fusing Assembly is contaminated or
damaged. Inspect the Fusing Assembly for toner build-up
or scratches on the fuser rollers. Try cleaning
with alcohol. Replace the Fusing Assembly if
damaged.
4. Static Eliminator Strip teeth are contaminated
or defective. Clean using compressed air.
5. Repetitive defect. If the lines are repeated at
a consistent interval down the page, this is a
repetitive defect. Refer to the “Repetitive Image Defect Ruler”
(Figure 7-25).
Table 7-9 Dropout
Table 7-10 Black Lines (parallel or perpendicular to path)
7
Troubleshooting
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