Brother BE-0901E-AC-PC Instruction Manual page 239

Symptom
Jump solenoid does not operate.
Wiper solenoid does not operate.
Pickker solenoid does not operate.
Thread trimmer solenoid does not
operate.
Pressor foot solenoid does not
operate.
• Check to see if connection from the jump solenoid to connector P10 of
the head PCB is proper.
• Check the resistance value of the jump solenoid which does not
operate with the connector section. The normal resistance value is
approximately 185Ω.
→ If it is faulty, replace the solenoid with a new one. In this case, the
head PCB may also be faulty. Also replace the head PCB with a
new one if it does not operate properly even after replacing the
solenoid.
• Replace the head PCB with a new one.
• Check to see if connection from the wiper solenoid to connector P11 of
the head PCB is proper.
• Check the resistance value of the wiper solenoid which does not
operate with the connector section. The normal resistance value is
approximately 28Ω.
→ If it is faulty, replace the solenoid with a new one. In this case, the
head PCB may also be faulty. Also replace the head PCB with a
new one if it does not operate properly even after replacing the
solenoid.
• Replace the head PCB with a new one.
• Check to see if connection from the pickker solenoid to connector P8
of the head PCB is proper.
• Check the resistance value of the pickker solenoid which does not
operate with the connector section. The normal resistance value is
approximately 426Ω.
→ If it is faulty, replace the solenoid with a new one. In this case, the
head PCB may also be faulty. Also replace the head PCB with a
new one if it does not operate properly even after replacing the
solenoid.
• Replace the head PCB with a new one.
• Check to see if connection from the thread trimmer solenoid to
connector P20 of the main PCB is proper.
• Check the resistance value of the thread trimmer solenoid which does
not operate with the connector section. The normal resistance value is
approximately 27Ω.
→ If it is faulty, replace the solenoid with a new one. In this case, the
main PCB may also be faulty. Also replace the main PCB with a
new one if it does not operate properly even after replacing the
solenoid.
• Replace the main PCB with a new one.
• Check to see if connection from the pressor foot solenoid to connector
P20 of the main PCB is proper.
• Check the resistance value of the pressor foot solenoid which does not
operate with the connector section. The normal resistance value is
approximately 80Ω.
→ If it is faulty, replace the solenoid with a new one. In this case, the
main PCB may also be faulty. Also replace the mainPCB with a
new one if it does not operate properly even after replacing the
solenoid.
• Replace the main PCB with a new one.
BE-0901E-AC-PC• BE-1201B-AC-PC
Chapter 12 Troubleshooting
Measures
12-7