C4 Maintenance    14. Replacing the LED Lamp 
 
C Series Maintenance Manual Rev.2  159 
Removal: LED lamp 
1.  Turn OFF the Controller power. 
 
2.  Remove the Arm #3 head cover. 
For details, refer to C4 Maintenance: 3. Covers. 
 
3.  Remove the connector connected to the LED lamp. 
The connector for the LED lamp (LED) is under the Arm #3 head cover. 
Connector: LED 
4.  Remove the LED lamp from the Arm #3. 
 
Turn the 
resin nut securing the LED lamp in the Arm #3 
counter-clockwise. 
 
 
Installation: LED lamp 
1.  Install the LED lamp to the Arm #3. 
Detach the resin nut from the LED lamp and pass the lamp through the Arm #3. Turn the nut clockwise 
from the inside of the Arm #3 and secure the lamp to the Arm #3. 
 
2.  Connect the following connectors. 
Connector: LED 
 
3.  Install the Arm #3 head cover. 
For details, refer to C4 Maintenance: 3. Covers.