Adjusting +5V Voltage - Epson RC520 Manual

Maintenance 5. Four-axis Drive Unit

5.5.3 Adjusting +5V Voltage

You may adjust the +5V voltage for the DMB control circuit using a control VR2, as
follows:
(1) Shut down Windows, and turn OFF the Control Unit and four-axis Drive Unit.
(2) Remove the Top Cover of the four-axis Drive Unit by removing the eight screws.
(3) Remove the Motor Driver module by removing the two mounting screws.
(4) Turn ON the four-axis Drive Unit.
(5) Measure the voltage between the through-holes marked as VCC and GND near the
(6) If the measured voltage is lower than 4.9V, turn VR2 on the DPB in the "+" direction
(7) Repeat step (5) to ensure that the voltage is between 4.9V and 5.2V.
(8) If necessary, repeat steps (7) and (8) until the voltage is within the range of 4.9V to
(9) After the adjustment, re-install the Motor Driver module in.
(10)
156
J16 connector on the DPB. If the +5V voltage is not within the range of 4.9V to
5.2V, adjust the voltage as follows:
by 1/2 turn to increase the voltage. If the measured voltage is higher than 5.2V,
turn VR2 in the "-" direction by 1/2 turn to lower the voltage.
5.2V.
Turn OFF the Drive Unit and re-install the Top Cover.
RC520 Rev.7