Replacing The Dmb - Epson RC520 Manual

Maintenance 5. Four-axis Drive Unit

5.6.2 Replacing the DMB

■ Before performing any maintenance procedure, always make sure that the main
power of the Controller is turned OFF and that the high voltage charged area is
completely discharged. Performing any maintenance procedure while the main
power is ON or the high voltage charged area isn't discharged completely is
WARNING
extremely hazardous and may result in electric shock and/or cause serious
safety problems.
Replace the DMB by following the steps described below.
(1) Shut down Windows, and turn OFF the Control Unit and four-axis Drive Unit.
(2) Disconnect cables connected at the back of the four-axis Drive Unit.
(3) Wait for about 1 minute until the high voltage is discharged.
(4) Remove the Top Cover by removing the eight screws.
(5) Remove the two DMB mounting screws on the back of the four-axis Drive Unit as
(6) Make sure that the LED 9 (orange) on the DPB is OFF. The capacitors have not
(7) As shown below, remove the mounting screws on the motor drivers for four axes in
(8) If a Regeneration module is connected, remove it by following the steps, (5) and (6),
158
shown below.
M3 screws
completely discharged if this LED is ON. Make sure to wait until the LED goes
OFF.
the Drive Unit.
M4 screws
in the Maintenance 5.8.2 Replacing a Regeneration Module (For RC520DU) .
RC520 Rev.7