Dell 2135cn Service Manual page 553

Chapter 3 Removal and Replacement Procedures (RRPs)
12) Release the clamps that fix the
harness of the HARN ASSY INTERLOCK,
remove the harness.
13) Remove the one screw (sliver, tap,
16mm) that fixes the HARN ASSY
INTERLOCK to the printer, remove the
HARN ASSY INTERLOCK.
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Version 1 2008.02.01