Unplug the unit. Hold down the menu key while plugging back in / powering up. When finished initializing, hit 99. Wait to status comes back and hit 91.
This supposedly happens due to a power surge or outage. If this doesn't work for you try reversing the numbers above. I have a bad memory, it might be 91 first then 99 but, you definately have to hold down the menu key.
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Re: Error 77 is apprearing
Probably a bad fuser.
Error codes shown in the "MACHINE ERROR X X " message
( 71 Polygon motor does not synchronize with the reference clock. )
( 72 Cannot detect Beam Detect signal. )
( 73 No toner cartridge loaded. )
( 74 Toner empty. )
( 75 In-casing temperature error. )
( 76 Heater harness disconnected or broken. Or heater thermistor harness
disconnected or broken when the power is turned on, the front cover is
opened and closed, or the machine exits from the sleep mode. )
( 77 Power turned off and on at the occurrence of error 76 or 78. )
( 78 Heater thermistor short-circuited. Or heater thermistor harness disconnected
or broken when the machine is on standby. )
( 79 In-casing temperature sensor harness disconnected or broken. )
( 7A Main motor does not synchronize with the reference clock. )
( 7B ASIC error on the main PCB. )
( 7C Engine PCB error. )
( 7D Abnormal discharge of the corona wire detected by the toner sensor. )
( 80 Paper size setting error. )
( 82 Paper feeding error. )
( 83 Paper jam. The registration sensor, 2nd registration sensor, and/or manual
insertion sensor remains ON.)
( 84 Paper jam. The paper ejection sensor remains ON. )
( 85 No paper cassette loaded. )
( 86 No 2nd paper cassette loaded. )
( 88 Paper jam. Even after the registration sensor has gone OFF, the paper
ejection sensor still stays OFF.)
( A1 Front cover opened. )
( A2 Document too long to scan. )
( A3 Document not detected by the document rear sensor. )
( A4 50% or more faulty of white level data. )
Error codes in parentheses do not appear in the "MACHINE ERROR X X", since those errors are
displayed as messages described in "[ 1 ] Error messages on the LCD." In the maintenance mode
(Function code 82), those error codes may be displayed.
VI - 6
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( 76 Heater harness disconnected or broken. Or heater thermistor harness disconnected or broken when the power is turned on, the front cover is opened and closed, or the machine exits from the sleep mode. ) ( 77 Power turned off and on at the occurrence of error 76 or 78. ) ( 78 Heater thermistor short-circuited. Or heater thermistor harness disconnected or broken when the machine is on standby. )
Error #77 refers to a mechanical problem, but I'd say about 7 times out of 10 it's a mistake. Fortunately, Brother fax machines have override commands :). Try this:
1. Turn the power off and unplug the power source. 2. Press and hold the menu button and plug in the power source (don't let go of the menu button!). 3. Hold the menu button for 5 seconds after plugging in the power source. 4. Release the menu button and press "91" 5. If the screen still shows the error code, press "99".
Hopefully this will override the error and you can get back to work :) .
The 77 error is caused by a fuser temperature sensor. The following steps can be used to possibly reset the Intellifax 4100 77 error.
1. Unplug machine then wait 15-20 minutes. 2. Hold down menu key. Plug in machine. 3. Release menu key at maintenance message. 4. press 91 then set button 5. press 99 then set button 6. Machine will warm up. 7. Press Reports key, then press 1. This will test if the machine can print.
If these steps do not reset the error the thermal fuse would have to be replaced by a repair technician.
Unplug the power, press and hold the menu button, the power (hold the menu button for 5 seconds after power is plugged in). Release the menu button, now press 91, if the display still shows the error, press 99
Error 76 is a fuser error, you can try going in and out of service mode, press the following key combination all within 2 seconds " features or function , * , 2 , 8 , 6 , 4 , " if done fast enough the all the lights willl be flashing. Them exit out of service by pressing 99. If the error returns after startup the fuser will have to be replaced.
related to a fuser error. Unit is detecting a too high or low heat internally. Try turning off for a few minutes. If error returns check voltage level at outlet or try a different outlet. Maybe too many items plugged in same outlet. If error returns, may need new fuser or thermistor.
Machine error 76 is a bad fuser lamp. Machine error 78 is a bad thermistor. Machine error 77 means you hade either a Machine error 76 or Machine error 78 and turned the machine off.
Sometimes the machines will give a false code and can be reset. Unplug machine. Hold down the Menu key while powering back up. You should still get a Machine error message. Enter the number 9...The display should change to Maintenance 9 then enter 1. The Machine error will return. Enter 99 and then make a test print. If you get either a machine error 76 or 78 you will need to have service done on your machine to have either the lamp or thermistor replaced, and depending on the usage of the machine, it might not be a bad idea to replace the entire fuser.