Lexmark C734 Service Manual page 348

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e.
Remove all of the toner cartridges.
f.
Tighten the printhead mounting screws in the following order: B1, B2, and B3.
5.
Replace the printhead alignment screw cover (C).
Be sure to replace the screw cover so that the notch in the cover faces to the rear of the printer. This
makes it much easier to remove the next time.
6.
Replace the toner cartridges.
7.
Reinstall the transfer module and the photoconductor units.
8.
Connect the transfer module cable.
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Service Manual