HP LaserJet Enterprise M552 - Fans; Solenoids; Clutches; Switches

Fans
The printer has four fans for preventing the temperature from rising in the printer and for cooling the printed
pages.
The DC controller determines if there is a fan failure and noties the formatter if the fan locks for a specied
time from when the fan starts.
Table 1-3 Fans
Abbreviation Name Cooling area Type Speed Replacement part
number
FM1 Power supply fan Around the low-voltage
power supply unit
Intake Full/half Fan
(RK2-2416-000CN)
FM2 Cartridge fan Around the toner cartridges Intake Full Fan
(RK2-6124-000CN)
FM3 Delivery fan Around the output tray
Around the fuser area
Exhaust Full/half Fan
(RK2-2728-000CN)
FM4 Fuser fan Around the fuser Exhaust Full/half Fan
(RK2-2418-000CN)
Solenoids
Table
1-4 Solenoids
Abbreviation Component name
SL1 Primary transfer roller disengagement solenoid
SL2 Tray 1 pickup solenoid
SL3 Duplex reverse solenoid (M552dn, M553dn, M553x, and M577 only)
Clutches
Table
1-5 Clutches
Abbreviation Component name
CL1 Tray 2 pickup clutch
CL2 Duplex re-pickup clutch (M552dn, M553dn, M553x, and M577 only)
Switches
Table
1-6 Switches
Abbreviation Component name Replacement part number
SW1 24V interlock switch Interlock switch cable assembly (RM2-7206-000CN; part not
available)
SW3 Right door switch Switch button (WC2-5806-000CN; part not available)
14 Chapter 1 Theory of operation ENWW