Brother MFC-J6510DW Service Manual page 66

Error Code 40
Unable to Init. 40
Casing internal thermistor defective. (Detects -20ºC or below or 80ºC or higher)
Step
1 Casing internal temperature
thermistor defective
2 Main PCB defective
Error Code 42
Unable to Print 42
Head drive voltage dropped below the lower limit.
User Check
- This error may occur when the ambient temperature is low. Increase the ambient temperature for
use of the machine.
Step
1 Connection failure of the carriage-
head flat cable or head flat cables
2 Print head defective
3 Power supply PCB defective
4 Main PCB defective
Error Code 43
Unable to Print 43
Head thermistor defective. (Detects -20ºC or below or 80ºC or higher when the power is turned
on)
Step
1 Connection failure of the carriage-
head flat cable or head flat cables
2 Head temperature thermistor
defective
3 Main PCB defective
Cause
Replace the ink refill ASSY.
Replace the main PCB ASSY.
Cause
Check the connection and reconnect the
corresponding flat cable(s).
Replace the head/carriage unit.
Replace the power supply PCB.
Replace the main PCB ASSY.
Cause
Check the connection and reconnect the
corresponding flat cable(s).
Replace the carriage PCB ASSY.
Replace the main PCB ASSY.
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LCD
Solution
LCD
Solution
LCD
Solution
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