Dell 2135cn Service Manual page 689

Chapter 3 Removal and Replacement Procedures (RRPs)
Replacement 23 COVER SCANNER LOW (PL10.1.2)
1) Mate the four hooks of the COVER
SCANNER LOW with the holes of the
printer.
2) Shift the COVER SCANNER LOW to
the left side, mate the one boss of the
COVER SCANNER LOW with the holes of
the frame.
Go to the next replacement step:
Replacement 45 COVER POLE OUT (PL10.1.1)
3 - 187
Version 
2008.03.31