C4 Maintenance  4. Cable Unit 
 
20  C Series Maintenance Manual Rev.2 
4. Cable Unit 
 
4.1  Replacing the Cable Unit 
 
 
WARNING
 
■
performing  any replacement procedure,  turn OFF the  Controller  and 
 and then disconnect the power plug from the power source. 
Performing any replacement procedure with the power ON is extremely hazardous 
and may result in
 electric shock and/or malfunction of the robot system. 
Do not connect or disconnect the motor connectors while the power to the robot 
system is turned ON.  Connecting or disconnecting the motor connectors 
with 
the power ON is extremely hazardous and may result 
in serious bodily injury as 
ve abnormally, and also may result in electric  shock 
and/or malfunction of the robot system.
 
Be sure to connect the AC power cable to a power receptacle.    DO NOT connect 
it directly to a factory power source.  To shut off power 
to the  robot system, 
disconnect the power plug from the power source.    Performing any work while 
connecting the AC power 
cable to a factory power source is extremely hazardous 
 electric shock and/or malfunction of the robot system. 
Be careful not to get any foreign substances in the Manipulator, connectors, and 
pins during maintenance.    Tur
ning ON the power to the robot system when any 
foreign substances exist in them is extremely hazardous and may result in electric 
shock and/or malfunction of the robot system.
 
Be sure to connect the cables properly.    Do not allow unnecessary strain on the 
cables. 
  (Do not put heavy objects on the cables.    Do not bend or pull the cables 
Unnecessary strain on the cables may result in damage to the cables, 
disconnection, and/or contact failure.   
These are extremely hazardous and may 
result in electric shock and/or improper function of the robot system.
 
■
When installing the cover, be 
careful not to allow the cables to interfere with the 
cover mounting and do not bend these cables forcibly to push them into the cover.   
Unnecessary strain on cables may result in damage to the cables, disconnection, 
and/or contact failure.  Damaged cables
, disconnection, or contact failure is 
extremely hazardous and may result in electric shock and/or improper function of 
the robot system.
 
When routing the cables, observe the cable locations after removing the cover.   
Be sure to place the cables back to th
eir original locations. 
 
 
CAUTION 
■
 disconnecting the connectors during the replacement of the cable unit, be 
sure to reconnect the connectors to their proper positions.
 
Improper connection of the connectors may result in improper function of the 
robot 
 
For details on the connections, refer to
 the C4 Maintenance 4.2 Connector Pin