Brother BES-1216AC Instruction Manual page 151

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Symptom
ERROR E5 to ERROR FF frequently
occur.
All solenoids of head do not operate.
Jump solenoid does not operate.
Wiper solenoid does not operate.
Pickker solenoid does not operate.
Thread trimmer solenoid does not
operate.
• Replace the main PCB with a new one.
• Refer to the block diagram showing cable connections and check fuse
F2 on the power supply PCB.
If it is blown, replace it with a new one. The 60v circuit is faulty if the
fuse is blown immediately after turning on the power even after
replacing the fuse.
• 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.
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.
BES-916AC • BES-1216AC
Chapter 10 Troubleshooting
Measures
The normal resistance value is
149

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