Photo sensors and switches
The following gure shows the sensors and switches for the pickup, feed, and delivery system.
Figure 1-30  Photo sensors and switches
SR8
SR6 (SR6N)
SR13 (SR13N)
SR14 (SR14N)
SR12
SR9
PS1
SE1
SR10
SW5
Table 1-19  Photo sensors and switches
Abbreviation Component Replacement part number
PS1 Loop sensor Fuser
●
B5L35-67901 (110V)
●
B5L36-67901 (220V)
SE1 Media sensor Registration assembly
●
RM2-0093-000CN (M553n)
●
RM2-0018-000CN (M552dn, M553dn, M553x, M577)
SR6 Top-of-page (TOP) sensor (M552dn, M553dn, M553x, 
and M577 only)
Registration assembly (RM2-0018-000CN)
SR6N Top-of-page (TOP) sensor (M553n only) Registration assembly (RM2-0093-000CN)
SR8 Tray 1 media-out sensor Right door assembly (RM2-0019-000CN)
ENWW Pickup, feed, and delivery system 51