Brother DCP7010 Service Manual page 194

Error Code
(Hex)
Heater overheats.
76
77 The power supply is turned
off when the error 76 or 78
occurs.
Temperature of the heater does
78
not rise.
79 In casing temperature sensor
harness disconnected or
broken. (Not used.)
7A Main motor does not
synchronize with the reference
clock.
7B ASIC error on the main PCB.
(Not used.)
7C-7F Not used.
The solution when Error Code 76,77,78 shown in the machine:
It's possible that the temperature of the heater rises when these kinds of error occur. Therefore, the
heater is programmed to turn off the power for 10 minutes after the switch is on for the safety
concern when the error occurs.
To help the heater work properly, it's necessary to follow the operating procedures as below after
taking measures against the cause of the error.
1. Turn off the switch. Wait until the temperature of the heater lowers enough.
2. Turn on the switch.
3. Display the maintenance mode, then switch to the desired mode or keep the power on for 10
minutes.
Symptom
9 - 6
Probable Cause
Thermistor in the fixing
unit defective
PS PCB unit defective
Main PCB defective
---
Poor connection in the
harness of the halogen
lamp
Halogen lamp defective
Thermistor defective
PS PCB unit defective
Main PCB defective
Main PCB defective
Main motor defective
Solution
Replace the thermistor in
the fixing unit.
Replace PS PCB unit.
Replace the main PCB.
---
Reinsert and adjust the
harness
Replace halogen lamp.
Replace the thermistor
Replace PS PCB unit.
Replace the main PCB.
Replace the main PCB.
Replace the main motor.
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