Table 1-7 Photointerrupters (continued)
Abbreviation Component name Replacement part number
SR301 Duplex switchback feed sensor RM2-0291-000CN (M855)
RM2-5061-000CN (M880)
SR302 Developer delivery sensor
SR303 Color sensor engagement sensor RM2-5045-000CN
SR304 Duplex refeed sensor RM1-9640-000CN
SR2501 TOP sensor A2W77-67904
Table 1-8 Sensors
Abbreviation Component name Replacement part number
CN1 Environment sensor RK2-4811-000CN
CS Color sensor RM2-5045-000CN
MS Registration sensor A2W77-67904
- CPR/Density sensor RM2-7026-000CN
- ITB seal sensor
SCN-TH1 Laser scanner assembly temperature sensor 1
SCN-TH2 Laser scanner assembly temperature sensor 2
- Process cartridge toner collection box full
sensor (Y)
- Process cartridge toner collection box full
sensor (M)
- Process cartridge toner collection box full
sensor (C)
- Process cartridge toner collection box full
sensor (K)
- Process cartridge toner-level sensor (Y)
- Process cartridge toner-level sensor (M)
- Process cartridge toner-level sensor (C)
- Process cartridge toner-level sensor (K)
Motors
The product has numerous motors for paper feed and image formation. The DC controller can sense
failure for several of the motors. When this occurs, the DC controller notifies the formatter so it can
halt the printing process and provide an alert on the control panel display.
12 Chapter 1 Theory of operation ENWW
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