Dell 2135cn Service Manual page 533

Chapter 3 Removal and Replacement Procedures (RRPs)
7) Open the COVER ASSY ESS
completely.
8) Remove the two screws (silver, tap,
8mm) that fix the COVER ASSY SIDE L
(PL10.1.10) to the printer.
9) Release the front hook of the COVER
ASSY SIDE L.
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Version 2 2008.03.31