Brother BES-962BC - Manual (Page 263)

BES-962BC • BES-1262BC 261
Chapter 12 Troubleshooting
Only a certain head does not oper-
ate.
• Is the head out of action with either the head switch or the machine
controller?
• Refer to the block diagram showing cable connections and check to
see that other cables are connected to the head switch PCB and the
head PCB and the head PCB properly.
Jump solenoids and wiper solenoids
of all heads do not operate.
• Refer to the block diagram showing cable connections and check to
see if connection from connector P4 of the power supply PCB in the
control box to connector P6 of the power supply PCB in the power
supply base, and connection from connector P5 of the power supply
PCB in the power supply base to the 39 terminal of the power
transformer are proper.
• Check fuse F4 on the power supply PCB in the power supply base.
If it is blown, replace it with a new one. The 50v circuit is faulty if the
fuse is blown immediately after turning on the power even after
replacing the fuse.
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.
Y-axis motor overcurrent stop oc-
curs.
• Measure the resistance values of pin 1 and pin 2, pin 2 and pin 3, pin 3
and pin 4, pin 4 and pin 5, and pin 5 and pin 1 at each connector
section of the Y-axis motor with the tester and check to see if they are
approximately 2.4
Ω
.
Replace the faulty motor with a new one.
• Refer to the block diagram showing the cable connection and check to
see if connection from the Y-axis motor to the main PCB is proper.
• Replace the main PCB with a new one.
The following errors frequently occur.
• Lower shaft memory error
• ERROR E5 to ERROR FF
• Replace the main PCB with a new one.
Symptom Measures