HP LaserJet Enterprise M552 - Page 60

Figure 1-12 Sensors
SR4
Y
M
C
K
SR5
SR1
SR2
SR3
DC controller
Environmental
sensor
Y toner level
sensor
M toner level
sensor
C toner level
sensor
K toner level
sensor
Registration
density sensor
SE1
Toner collection unit full sensor
Table 1-14 Sensors
Abbreviation Component Replacement part number
SR1 Drum home position sensor 1 Main motor drive assembly (B5L25-67902)
SR2 Drum home position sensor 2 Main motor drive assembly (B5L25-67902)
SR3 Drum home position sensor 3 Main motor drive assembly (B5L25-67902)
SR4 Developing home position sensor Main motor drive assembly (B5L25-67902)
SR5 Primary transfer roller disengagement sensor Estrangement detect PCA assembly (RM2-7157-000CN)
SE1 Media sensor Registration assembly
●
RM2-0093-000CN (M553n)
●
RM2-0018-000CN (M552dn, M553dn, M553x,
M577)
Yellow toner-level sensor Part not available
Magenta toner-level sensor Part not available
Cyan toner-level sensor Part not available
Black toner-level sensor Part not available
Registration density sensor Density detect assembly (RM2-7160-000CN)
Environmental sensor Environmental sensor PCA assembly (RM2-7154-000CN)
Toner collection unit full sensor Waste toner detect PCA assembly (RM2-7130-000CN)
32 Chapter 1 Theory of operation ENWW