Sensors
Table 5-4 Sensors
Component abbreviation Component name
SR1 Drum home position sensor 1
SR2 Drum home position sensor 2
SR3 Drum home position sensor 3
SR5 Fuser (fixing) delivery sensor
SR6 Delivery tray media full sensor
SR7 Fuser (fixing) pressure release sensor
SR8 TOP (top of page) sensor
SR9 Cassette-media-stack surface sensor
SR11 Developing home position sensor
SR13 Cassette presence sensor
SR14 Loop sensor 1
SR15 Loop sensor 2
SR17 Primary-transfer-roller disengagement sensor
SR20 Cassette-media presence sensor
SR21 MP-tray-media-presence sensor
SR22 Duplex re-pickup sensor (HP Color LaserJet CP3525dn and HP Color LaserJet CP3525x only)
OHT sensor (in)
OHT sensor (out)
RD sensor (front)
RD sensor (rear)
Environmental sensor (temperature and humidity)
Yellow toner-level sensor
Magenta toner-level sensor
Cyan toner-level sensor
Black toner-level sensor
Toner collection-box-full sensor
Fuser (fixing) home-position sensor
Motors and fans
The product has 11 motors and three fan motors. The motors drive the components in the paper-feed
and image-formation systems. The fan motors cool the product's inside.
ENWW Engine-control system 109
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