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Code :

Code: U4-1
Display: “Fuser Failure\Press i”
Description: Fuser High Temp U4-1: Fuser Fail/Power Off
Causes: • Fuser Assembly • HVPS/Engine Logic Board • LVPS • Fuser Assembly Harness • LVPS Harness Assembly

Code: U4-2
Display: “Fuser Failure\ Press i”
Description: Fuser Low Temp U4-2: Fuser Fail/Power Off
Causes: • Fuser Assembly • HVPS/Engine Logic Board • LVPS • Fuser Assembly Harness • LVPS Harness Assembly

Code: U4-3
Display: “Fuser Failure\ Press i”
Description: Fuser Overheat in Stand-by U4-3: Fuser Fail/Power Off
Causes: • Fuser Assembly • HVPS/Engine Logic Board • LVPS • Fuser Assembly Harness • LVPS Harness Assembly

Code: U4-4
Display: “Fuser Failure\Press i”
Description: Fuser Fails at warm-up U4-4: Fuser Fail/ Power Off
Causes: • Fuser Assembly • HVPS/Engine Logic Board • LVPS • Fuser Assembly Harness • LVPS Harness Assembly

Code: U4-5
Display: “Fuser Failure\Press i”
Description: Fuser Thermistor Failure U4-5: Fuser Fail/ Power Off
Causes: • Fuser Assembly • HVPS/Engine Logic Board • LVPS • Fuser Assembly Harness • LVPS Harness Assembly

Code: U5
Display: “Fan Failure\ Power Off Now\ Press i”
Description: U5: Fan Fail/ Power Off
Causes: • Main Fan • Sub Fan • LVPS • HVPS/Engine Logic Board

Code: U6
Display: Engine Logic Board NVRAM Failure\ Press i
Description: U6: NVM Fail
Causes: • HVPS/Engine Logic Board

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