HP LaserJet II Serie Manual De Instrucciones página 231

HP 33440/HP 33449 COMBINED SERVICE MANUAL
POSSIBLE CAUSE
1. Paper Tray
MicroSwitches.
Table 7-37. Improperly Sized Image
The purpose of the paper tray
microswitches is to indicate b the DC
Controller PCA what size paper tray
is instiled. The DC Controller will
then use this information to format the
print image to the stie of the paper
intiled in the tray. K the paper tray
microswitches are defective, the DC
Controller is receiving false information
and will format the print image h an
improper size.
Table 7-38. Vertical Dark Streaks
1. Dirty Primary
Corona wire.
A dirty Primary Corona wire wi~ leave
areas under the contaminated potion
with an inadequate charge to repel
unwanted toner.
2.
Bad EP-S
Cartridge.
Contaminants lodged within the
cartridge or improper manufacturing
(or refilling) can cause non-uniform
characteristics.
3.
Incompatible During forms manufacture, inks or
forms.
other finishing processes may interfere
Iwith the eleckophotographic (EP) or
Ifnsing process.
Table 7-39. Character Voids
AC~ON
Perform the "Tray Size
Switches (SW201, SW202,
SW203) Functional Check" in
Section 7-4. If envelopes are the
problem, ensure the envelope
size setting (displayed following
insertion of an envelope tray) is
set properly.
Clean the Primary Corona wire.
Replace the EP-S Cartridge.
Change we of form.
Hinti Check the Fuser
Cleaning Pad for contaminant
buildup.
1. Bad
transparencies.
Transparencies wi~ exhibit this
Use Hewlett-Packard-approved
problem if they are not designed for
transparencies (refer to Chapter
proper toner adhesion.
2, Section 2-6).
2.
Bad paper lot. The surface of the paper may be too
Try a known paper from a
smooth for proper toner adhesion.
known source (see Chapter 2,
Section 2-4).
3.
Poor fusing.
Toner may not be properly fused to the
Perform the "Fusing Check" at
media.
the end of this section.
7-67