Sensors
Table 1-7 Sensors
Abbreviation Component name Replacement part
PS1 Loop sensor Part not available
SE1 Media sensor Registration assembly
●
RM2-0093-000CN (M553n)
●
RM2-0018-000CN (M552dn, M553dn, M553x,
M577)
SR1 Drum home position sensor 1 Part not available
SR2 Drum home position sensor 2 Part not available
SR3 Drum home position sensor 3 Part not available
SR4 Developing home position sensor Part not available
SR5 Primary transfer roller disengagement sensor Estrangement detect PCA assembly (RM2-7157-000CN)
SR6 Top-of-page (TOP) sensor (M552dn, M553dn,
M553x and M577 only)
Part not available
SR6N Top-of-page (TOP) sensor (M553n only) Part not available
SR8 Tray 1 media-out sensor Part not available
SR9 Fuser delivery sensor Part not available
SR10 Output bin media-full sensor Part not available
SR11 Fuser pressure release sensor Photointerrupter (WG8-5953-000CN; part not available)
SR12 Tray 2 media-out sensor Part not available
SR13 Media width sensor, front (M552dn, M553dn,
M553x and M577 only)
Part not available
SR13N Media width sensor, front (M553n only) Part not available
SR14 Media width sensor, rear (M552dn, M553dn, M553x
and M577 only)
Part not available
SR14N Media width sensor, rear (M553n only) Part not available
Registration density sensor Density detect assembly (RM2-7160-000CN)
Environment sensor (temperature and humidity) Environment sensor PCA (RM2-7154-000CN)
Yellow toner-level sensor Cartridge lift-up rail assembly (RM2-0025-000CN; part
not available)
Magenta toner-level sensor Cartridge lift-up rail assembly (RM2-0025-000CN; part
not available)
Cyan toner-level sensor Cartridge lift-up rail assembly (RM2-0025-000CN; part
not available)
Black toner-level sensor Cartridge lift-up rail assembly (RM2-0025-000CN; part
not available)
Residual toner collection unit full sensor Waste toner detect PCA (RM2-7130-000CN)
16 Chapter 1 Theory of operation ENWW
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