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Intellifax 4100 machine reporting error 77. - Brother Fax Machines

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Error 77 is a fuser error. If shutting off the power for up to 20 minutes doesn't reset the unit, then you will need a new part. This repair could cost up to $200.

Posted on Jun 12, 2008

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What is error 77 and how do I fix it?


make sure its not jamed with papper blow out with air in can.

Feb 14, 2011 | Brother IntelliFAX 4100 Laser Fax

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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

Error Code 77?? What does this mean?


  1. Power turned off and on
  2. close the front cover correctly

Oct 19, 2010 | Brother IntelliFAX 4100 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
print.
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

Getting a error msg 77 ?


Your Heater Thermistor most likely short circuited. It's a $10.00 part, however, you will want a Brother ASC to replace the part as it requires you to take most of the machine apart. Call your local Brother ASC by searching Brother's Website http://www.brother-usa.com/service/default.aspx enter your printer info and your zip code.

Dec 31, 2009 | Brother IntelliFAX 4100 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

1 Answer

Brother IntelliFax 4100 sending solid black pages


It sounds like the CIS (scanner) has failed in both machines. Its no generally not a common problem. I would change one every six months if I was lucky.

It may point to something in your environment. I have have seen rust build up on the contacts of the scanner cause this problem. So if you have high moisture or are close to the ocean this maybe a problem.

Feb 14, 2008 | Fax Machines

1 Answer

Brother intellifax 4100e


Hi, the error code refers to the heater thermistor short circuited or heater thermistor disconnected or broke when the power was turned on, front cover is open or closed or when the machine exits from sleep mode.I hope this help!!

Dec 04, 2007 | Brother IntelliFAX 4100 Laser Fax

1 Answer

Problems with the fax machine


YOU CAN TRY A SYSTEM CLEAR BUT IT MOST LIKELY NEEDS A FUSER UNIT
SYSTEM CLEAR  MENU *2864 THEN 01 THEN 99 TO EXIT

Aug 31, 2007 | Brother IntelliFAX 4100 Laser Fax

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