Brother MFC9420CN Trouble Error Codes List

Brother MFC9420CN Trouble Error Codes List

Code	Description	Causes
20	Laser power error	Connector LCN does not properly connected Laser unit defective Engine controller board defective
21	Beam detector error.	Connector LCN does not properly connected Laser unit defective Engine controller board defective
22	NVRAM error	Main PCB defective
23	Engine controller hardware error	Control error Engine controller board defective
24	Process timing clock error.	Main motor defective Engine controller board defective
25	Developing motor error	Toner cartridge gear defective Developer gear unit defective Developer motor defective Engine controller board defective
26	Main motor error.	Main motor defective Engine controller board defective
27	Scanner motor error	Connector LCN does not properly connected Laser unit defective Engine controller board defective
28	Charge HV unit error	HV Power Supply defective
29	LVPS error.	LV Power Supply defective
2A	Fuser thermistor error	Fuser thermistor defective Engine controller board defective
2B	Fuser heater error.	Breakdown of Heater On/Off Circuit Breakdown of Temp Control Circuit
2C	Fuser temperature low error at warming-up.	Contact Failure of Harness Connector Low Input Voltage
2D	Fuser temperature low error	Low Input Voltage
2E	Fuser temperature high error	Breakdown of Heater On/Off Circuit Breakdown of Temp Control Circuit

2F	Fuser ACOFF error.	Breakdown of Heater On/Off Circuit Breakdown of Temp Control Circuit
30	Erase LED error	Erase lamp defective Engine controller board defective
31	Power supply fan error	Power supply fan defective Engine controller board defective
32	Exit fan error	Exit fan defective Engine controller board defective
33	Laser unit fan ASSY error	Laser unit fan ASSY defective Engine controller board defective
34	Yellow switching clutch error	Yellow switching clutch defective Engine controller board defective
35	Magenta switching clutch error	Magenta switching clutch defective Engine controller board defective
36	Cyan switching clutch error	Cyan switching clutch defective Engine controller board defective
37	Black switching clutch error	Black switching clutch defective Engine controller board defective
38	Yellow switching solenoid error	Toner cartridge defective Toner retract solenoid assy defective Engine controller board defective
39	Magenta switching solenoid error	Toner cartridge defective Toner retract solenoid assy defective Engine controller board defective
3A	Cyan switching solenoid error	Toner cartridge defective Toner retract solenoid assy defective Engine controller board defective
3B	Black switching solenoid error	Toner cartridge defective Toner retract solenoid assy defective Engine controller board defective
3C	Transfer belt error	Transfer unit defective Marker sensor defective Engine controller board defective
3D	Transfer roller solenoid error.	Transfer roller solenoid defective Engine controller board defective

3E	Transfer belt cleaning solenoid error.	Transfer belt cleaning solenoid defective Engine controller board defective
3F	Fuser unit clutch error.	Fuser unit clutch defective Engine controller board defective
40	Belt marker sense error	Belt marker sensor defective Engine controller board defective
41	HVU connection error	LV Power Supply PCB defective Engine controller board defective
42, 43	Toner empty sensor connection error 1, 2	Toner sensor defective Engine controller board defective
44	Lower feeder unit connection error	Lower feeder unit connector damaged Engine controller board defective
50	Cyan toner empty	The cyan toner cartridge is empty.
51	Magenta toner empty	The magenta toner cartridge is empty.
52	Yellow toner empty	The yellow toner cartridge is empty.
53	Black toner empty	The black toner cartridge is empty.
54	Cyan cartridge run out	No cyan toner cartridge is installed.
55	Magenta cartridge run out	No magenta toner cartridge is installed.
56	Yellow cartridge run out	No yellow toner cartridge is installed.
57	Black cartridge run out	No black toner cartridge is installed.
58	Illegal toner cartridge	The substandard toner cartridge is installed.

59	Cyan toner near-empty	The cyan toner cartridge is nearly empty.
5A	Magenta toner near-empty	The magenta toner cartridge is nearly empty.
5B	Yellow toner near-empty	The yellow toner cartridge is nearly empty.
5C	Black toner near-empty	The black toner cartridge is nearly empty.
60	Stacker full	The output tray is full of the recording paper.
61	TMA&TMAM control	The automatic color calibration is failed.
70	OPC belt un-device	The OPC belt is removed.
71	Fuser unit un-device	The fuser unit is not assembled.
72	Transfer roller un- device	The transfer roller is not assembled.
73	Waste toner box full or un-device	The waste toner box is not assembled. The waste toner box is full.
74	OPC belt exchange	Replacement timing of the OPC belt.
75	Fuser unit exchange	Replacement timing of the fuser unit.
76	Transfer roller	Replacement timing of the transfer roller.
77	120K Kit exchange	Replacement timing of the 120K kit.
78	PF Kit2 exchange	Replacement timing of the PF Kit2.

79	Wasted toner box near-full (exchange)	The waste toner box is nearly full.
7A	Top cover open error	The top cover is opened.
7B	Back cover open error	The back cover is opened.
80	AT the start of FAX message printing, the controller detects that paper is smaller than A4 size in length.	Paper smaller than the specified size loaded in the paper tray Engine controller board PCB defective
81	Recording paper jam. (The paper width sensor stays ON even after completion of paper ejection operation.)
82	Recording paper jam in paper pull-in operation (The paper width sensor fails to detect the leading edge of paper.)
83	Recording paper jam. (The registration sensor comes ON too early in the paper feeding operation.)	Paper is not correctly set in the paper tray Separation pad damaged Registration sensor actuator unhooked Engine controller board PCB defective
84	Recording paper jam. (The registration sensor stays ON after completion of paper ejection operation.)	The paper ejection roller does not rotate correctly Foreign materials in the paper path. Registration sensor actuator caught on the surrounding parts Registration sensor broken Engine controller board PCB defective
85	No paper tray loaded.
86	Tray2 Open
87	Paper Type Error
88	Recording paper jam. (Even after paper pulling-in operation, the registration sensor is still OFF.)	Recording paper not loaded correctly Registration sensor broken Separation pad damaged Objects, such as bits of paper or chips, are in the paper tray or paper tray Paper pick up roller defective Main motor broken Engine controller board PCB defective
A1	Front cover (scanner unit) opened.	Hook of the front open switch on the front cover broken Front open switch broken
A2	Document length exceeding the scan limitation. During scanning, 90 cm or longer of a document is detected. During document feeding or ejecting, 400 cm or longer of a document is detected.	Document jam Document rear sensor actuator caught on the surrounding parts Document rear sensor broken
A3	The document rear sensor does not come ON during document pull-in operation.	Document jam Document rear sensor actuator caught on the surrounding parts Document rear sensor broken

A4	50% or more faulty of white level data.
A5	FAX scanning failure. (1st time)	CIS defective White-level reference film stained in the scanner cover
A6	FAX scanning failure. (retry)	Main PCB defective
AB	CIS Resolution failure.	CIS defective. Main PCB defective
AC	Less than 50% faulty of white level data.
AF	CIS positioning error.	CIS flat cable broken or not connected CIS motor harness not connected properly CIS defective Main PCB defective
B7	A/D converter reference voltage error (at High level).	Main PCB defective
B9	Light emission intensity error of the LED array (Exceeding the upper limit).	CIS defective Main PCB defective
BB	White level data error. CIS defective Main PCB defective
BD	Black level data error.	CIS defective Main PCB defective
D0 ... DF	Modem error.	Main PCB defective
E6	Write error in EEPROM.	Main PCB defective
E8	Data scanning error during transmission.	CIS defective Main PCB defective
EA	Document removed at phase B.	Document front sensor actuator caught on the surrounding parts Sensor PCB defective Main PCB defective
F8	Battery connection error

FF	Memory management error

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