HP LaserJet II Serie Manual De Instrucciones página 228

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Table 7-31.
Suede
Print
PCA.
2.
Interface/Formatter
PCA.
2. Bent Static Teeth.
3. Media.
4.
Dirty Fuser
Cleaning Pads.
5.
Worn Gears.
6.
Foreign object in
paper path.
If the laser drive circuitry is
malfunctioning and turning the laser
on and off at incorrect intervals, suede
print may be observed.
Perform a Test Print to isolate
the DC Controller from the
Interface/Formatter PCA. If the
defective print occurs during
the Test Print function, assume
a defective DC Controller PCA
and replace it.
If the Interface/Formatter PCA is
defective, the PCA maybe instructing
the DC Controller PCA to turn the
laser on and off at incorrect times.
Perform a Test Print to isolate
the DC Controller PCA from
the Interface/Formatter PCA. If
the test print is acceptable but
the Control Panel test operation
is unacceptable, replace the
Interface/Formatter PCA.
Table 7-32. Smeared Print/Improper Fusing
The print will be smeared if the Fusing
Assembly is not heated sufficiently to
bond the toner image to the paper.
The purpose of the static teeth is to
assist in separating the paper from the
photoconductive drum by discharging
the positive charges placed on the paper
by the Transfer Corona. If the static
teeth are defective, the print could
possibly become smeared prior to the
paper entering the Fusing Assembly.
The media may not be acceptable for
the EP process and for laser printing.
Excessively dirty fuser cleaning pads
may result in contamination of the
Fu~ing Roller, thereby causing smeared
print.
When the EP-S Drum and paper are
not moving at the same speed, smudged
characters (often appearing to be bold
characters) will result.
Something is smearing the unfused
toner image on the surface of the paper.
Closely examine the static teeth
for defects. If the teeth are
bent or defective, replace the
Transfer Corona Assembly.
Verify that the media meets
specifications. (See the Paper
Specifications Guide or Chapter
2, Sections 2-4-2-6.
Replace the Fuser Cleaning
Pad.
Replace the EP-S Cartridge,
Feed Drive Assembly, 19- and
57-Tooth Gears, Main Motor, or
Fusing Assembly as necessary.
Remove any foreign material.
Try a new EP-S Cartridge.
7-64