HP LaserJet Quick Reference Service Manual Page 272

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Duplex Jamming: Misaligned Switchback Assembly
Associated Part Numbers:
Description:
is a misaligned switchback assembly (figure 8-16A/B in the IID/IIID
Service Manual ). This is often the result of using the switchback
assembly as a handle while lifting the printer, or shipping the printer
without the packing rods installed in the switchback assembly. The
switchback assembly should never be used as a handle when the
printer is being moved. If the printer needs to be transported, install the
packing rods to properly support the switchback assembly. If the rods
have been disposed of or misplaced, they can be ordered from HP
Parts Direct (800) 227-8164, part number RA1-8420-000CN.
Solution:
To properly realign the switchback assembly, loosen the
mounting screws and re-position the assembly until the switchback
frame is parallel with the output slot at the rear of the printer.
Duplex Jamming: Worn Lower Duplex Guide Assem-
bly
Associated Part Numbers:
Description:
depending upon the paper being used), a groove may develop in the
white plastic guide in the lower duplex guide assembly (figure 8-24 in
the IID/IIID service manual). The assembly is used to perform the left-
to-right alignment of the paper during its pass through the duplexer.
This guide can be best observed by removing the printer's cover panel
just below the switchback assembly. If a groove has been cut into the
plastic, paper will tend to hang up as it is dragged through the cut. If this
failure occurs, replace the lower duplex guide assembly (RG1-2498-
000CN).
270 – Summary of service notes and technical tips
Another possible cause of paper jams in the duplexer
Some time after 60,000 pages have been printed (and
RA1-8420-000CN
RG1-2498-000CN
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