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Brother BE-1204B-BC - PC control Manual

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12-4 BE-1204B-BC • BE-1204C-BC • BE-1206B-BC
Chapter 12 Troubleshooting
Electrical Section
Cautions
• Be sure to turn off the power of the machine and unplug the power cord before checking cable
connections.
• When you check connection of the cables as instructed in this manual, also check connection and
continuity between connectors.
• Carry out items described in the "Measures" section in order of appearance.
• Some checks and replacement works can be conducted only by repair people. In such cases,
contact your dealer.
Symptom Measures
The machine does not operate even
if the power is turned on.
• Is the power cord of the machine plugged in?
→ Plug in the power cord.
• Isn't the emergency stop switch locked?
→ Unlock the emergency stop switch.
• Is the connector at the side of the control box connected?
→ Connect it after checking the connector name.
• Is the connector in the control box connected?
→ Connect it after checking the types and colors of the connectors.
• Isn't the fuse on the side of the control box blown?
• Is the fuse on the PCB in the control box blown?
→ Replace the fuse with a new one. If the fuse is blown again,
something is faulty. Check to see if the wiring is correct. Replace
the control box with a new one.
An overtravel error occurs. • Is the frame within the cap frame area?
→ Move the frame within the cap frame area and turn on the power.
• Check to see if the signal of the X area sensor turns ON and OFF in
PORT test mode.
→ When the signal does not change, refer to the block diagram
showing the cable connections and check to see if connection from
the X area sensor to the main PCB is proper. Replace the X area
sensor with a new one.
The needle stop position error
occurs.
• Is the pulley manually turned and out of the stop angle?
→ Turn the pulley, adjust the needle at the stop position, and reset the
error.
• Check the signal of the stop position sensor in the encoder test mode.
→ Refer to the adjustment or cable connection block diagram and
check connection from the needle position detention sensor to the
main PCB. Replace the needle position detection sensor with a
new one.
… 252 …


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