Brother MFC7820N Trouble Error Codes List

Brother MFC7820N Trouble Error Codes List

Code	Description	Causes
56	The back cover is opened.
5B	New toner detection lever Error (Toner switch stays on.)	New toner detection lever broken New toner detection switch defective
6A	Heater warming-up timeout error. (Heater does not reach 60 within 11 second.)	Thermistor defective Halogen heater defective
6B	Heater warming-up timeout error. (Heater does not reach 100 within 15 second.)	Thermistor defective Halogen heater defective PS PCB defective
6C	Heater temperature exceeds the maximum high temperature. (270 or more is detected for 1sec.)
6E	Heater temperature does not go up enough.	Halogen heater defective PS PCB defective
6F	Heater hard limiter operates.	Thermistor defective PS PCB defective
71	Scanner motor does not synchronize with the reference clock.	Laser unit defective Main PCB defective
72	Cannot detect Beam Detect signal.	Laser unit defective Main PCB defective
73	The drum unit is not mounted.
74	Toner empty	Toner sensor defective Toner empty
75	In casing temperature error.	In casing temperature sensor defective
76	Heater overheat	Thermistor defective in Fixing unit Halogen heater defective
77	The power supply is turned off when the error 76 or 78 occurs.
78	Temperature of the heater does not rise	Poor connection in the harness of the halogen lamp Halogen lamp defective Thermistor defective PS PCB unit defective Main PCB defective

79	In casing temperature sensor harness disconnected or broken.	LVPS unit defective Main PCB defective
7A	Main motor does not synchronize with the reference clock.	Thermistor defective Main PCB defective Main motor defective
7B	ASIC error on the main PCB.
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
81	Recording paper jam. (The paper width sensor stays ON even after completion of paper ejection operation.)

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