Brother International BES-1240BC Instruction Manual - English - Page 268

If the lower shaft PCB is removed from the machine or P8 or P9 is, disconnected

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Chapter 12 Trouble Shooting Symptom Jump solenoid does not operate. Wiper solenoid does not operate. The lower shaft PCB is faulty. Measures • 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 56Ω. 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. • Refer to the block diagram showing the cable connections and check to see if connection from connector P12 of the head PCB to connectors P7, 8, 13, 14, 15, and 16 on the power supply PCB in the control box is proper. • 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. • Refer to the block diagram showing the cable connections and check to see if connection from connector P12 of the head PCB to connectors P7, 8, 13, 14, 15, and 16 on the power supply PCB in the control box is proper. • Replace the head PCB with a new one. 1. Turn off the power of the machine. 2. Disconnect P4 and P10 of the lower shaft PCB. If the lower shaft PCB is removed from the machine or P8 or P9 is disconnected, the lower shaft connected to other lower shaft PCB will not operate, either. 3. Turn on the power of the machine. The E-B2 error occurs and the green LED blinks with the head corresponding to the faulty lower shaft. Turn off the pause switch of the head (flip it down) and keep flipping up the mending switch until the green LED stops blinking. 4. If there is just one lower shaft PCB, reset the LEDs of the two heads and reset the error with the STOP key on the panel or the step back key of the head. 266 BES-940BC • BES-1240BC

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BES-940BC • BES-1240BC
266
Chapter 12
Trouble Shooting
Symptom
Measures
Jump 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 56
Ω
.
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.
•
Refer to the block diagram showing the cable connections and check
to see if connection from connector P12 of the head PCB to connectors
P7, 8, 13, 14, 15, and 16 on the power supply PCB in the control box is
proper.
•
Replace the head PCB with a new one.
Wiper solenoid does not operate.
•
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 28
Ω
.
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.
•
Refer to the block diagram showing the cable connections and check
to see if connection from connector P12 of the head PCB to connectors
P7, 8, 13, 14, 15, and 16 on the power supply PCB in the control box is
proper.
•
Replace the head PCB with a new one.
The lower shaft PCB is faulty.
1. Turn off the power of the machine.
2. Disconnect P4 and P10 of the lower shaft PCB.
If the lower shaft PCB is removed from the machine or P8 or P9 is
disconnected, the lower shaft connected to other lower shaft PCB will
not operate, either.
3. Turn on the power of the machine.
The E-B2 error occurs and the green LED blinks with the head
corresponding to the faulty lower shaft.
Turn off the pause switch of
the head (flip it down) and keep flipping up the mending switch until
the green LED stops blinking.
4. If there is just one lower shaft PCB, reset the LEDs of the two heads
and reset the error with the STOP key on the panel or the step back
key of the head.