Carriage Motor Cannot Stop; Casing Internal Thermistor Defective - Brother MFC-J2320 Service Manual

Error Code 3F

Unable to Print 3F

Carriage motor cannot stop.

Step
1 Carriage motor harness
connection failure
2 CR encoder strip stained
3 CR encoder strip defective
4 CR encoder sensor defective
5 Carriage motor defective
6 Main PCB defective
Error Code 40

Unable to Print 40

Casing internal thermistor defective

Machine internal thermistor detects -20 degree-C or less and 80 degree-C or more
when power is on.
Step
1 Machine internal thermistor
defective
2 Main PCB defective
Cause
Reconnect the carriage motor harness.
Clean the CR encoder strip.
Replace the CR encoder strip.
Replace the carriage PCB ASSY.
Replace the carriage motor ASSY.
Replace the main PCB ASSY.
Cause
Replace the ink refill ASSY.
Replace the main PCB ASSY.
2-34
LCD
Solution
LCD
Solution
Confidential