Question about Brother IntelliFAX 4100 Laser Fax

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Problems with the fax machine

The fax machine is diplaying something that says "machine error 77"

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Re: problems with the fax machine


Posted on Oct 24, 2007

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Require user manual for panasonic fax model KX FT 77

I have a problem with the fax machine in question is panasonic kx ft77 . When receiving a fax error expel warm up and stop receiving the document. Or does anyone know what the problem is and how to fix it ? Thanks in advance

Jan 06, 2011 | Fax Machines

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Error Code 77 on brother 4100 fax intelifox business class

( 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. )

Nov 05, 2010 | Brother IntelliFAX 4100 Laser Fax

1 Answer

Machine is on and showing "error message #77 and says to unplug machine and call dealer. What is error 77?

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 :) .

Hope this helps! Good luck!

Aug 30, 2010 | Brother IntelliFAX 2800 Laser Fax

1 Answer

Error 77 message

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
If these steps do not reset the error the thermal fuse would have to be replaced by a repair technician.

Jul 22, 2010 | Brother IntelliFAX 4100 Laser Fax

1 Answer

Machine error 77

Hello there, in a situation like this the best thing for you to do is to call Brother customer service at 800-284-4329 and explain the problem.
Thank you

Jul 16, 2010 | Brother IntelliFAX 2800 Laser Fax

1 Answer


You have a defective fuser unit, not heating up.

Jun 22, 2010 | Brother IntelliFax-4100e Fax

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Error 77

Error 77 is fuser error . Shut off the power for 20 minutes . If that didn't reset the unit , then you need a new part . Call the local dealer to ask about new part price .

please rate !

Apr 13, 2010 | Brother IntelliFAX 2800 Laser Fax

1 Answer

Error 77


Jul 14, 2009 | Brother IntelliFax-4100e Fax

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Machine error 77

the fuser unit (fixing unit) not registering heat requirement. The heat roller or the thermistor sensor is defective.Remove fuser and check roller, if good replace sensor, reinstall fuser and reset machine.

Aug 18, 2008 | Brother IntelliFAX 2800 Laser Fax

1 Answer

Error 77

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.

May 09, 2008 | Brother IntelliFAX 4100 Laser Fax

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