Troubleshooting
Image Formation Troubleshooting
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Table 7-20 Faded Print
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POSSIBLE CAUSE
RECOMMENDED ACTION
1. Toner supply low,
Shake the cartridge gently to redistribute
the toner, or replace the cartridge.
2. Print Density is set incorrectly, Print
Change to a darker setting and retry
Density is adjustable through software,
printing.
through HP Explorer’s Remote Control
Panel, or through the front control panel
~LaserJet 4P/4MP).
3. EconoMode is on. EconoMode saves Turn EconoMode off through software,
toner by reducing the dot density. This through HP Explorer’s Remote Control
may appear to be a print quality problem Panel, or through the front control panel
in some cases. (LaserJet 4P/4MP).
4. Paper does not meet specs. The mois- Try a different paper lot (see ‘(Media
ture content, conductivity, or surface fin- Specifications” in Chapter 2).
ish may not work correctly with the
printer’s electrophotographic process.
5. Transfer Roller is defective or incor-
Inspect the Transfer Roller for proper
rectly installed. If the transfer roller loses installation and contact. If the Transfer
conductivity, it cannot effectively pull
Roller is damaged, replace it.
toner from the drum to the paper.
6. Laser/Scanner door not opening
1. Remove and re-seat the toner
properly. cartridge.
2, Check the Laser/Scanner shutter door
for proper operation. If defective,
replace the Laser/Scanner Assembly.
7. High Voltage Connector Assembly is Check the pins and springs for
defective. The High Voltage Connector
functionality, If dirty, clean using alcohol;
Assembly mounts on the DC Controller
if damaged, replace the High Voltage
PCA and uses spring-loaded pins to con- Connector Assembly.
tact the toner cartridge.
8. DC Controller PCA is defective. The
Replace the DC Controller PCA.
DC Controller supplies the proper volt-
age to the High Voltage contacts.
7-26
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