Advantech HMI-640S user manual Power Supply

3.4 Power Supply

To repair or replace the power supply:

1.Verify that the power source to the HMI-640S has been disconnect- ed.

2.Open the rear cover. (See Section 3.1)

3.Remove the four screws attaching the power supply to the CPU board.

4.Disconnect the cable from the power supply.

5.Replace the power supply and reassemble.

Warning: Shut off power to the HMI-640S before attempting to

repair the power supply. Simply switch off the power and unplug the unit.

2 6 HMI-640S User's Manual