Replacing a Power Supply (P/S)

The Lotem 800 Quantum has two power supplies for the head:

• P/S 1 - provides power for the system electronics:
  • 24 V to the MCE
  • 24V to the Auto Focus beam
  • 48V to the Tec.
• P/S 2 - is a switched 48 VDC power supply used to turn on the write laser power board in the Thermal II head. It is only on when all panels are closed.

The input voltage to both power supplies is 208 VAC.

Tools

• Anti-static wrist strap?
• Phillips screw driver?
  

Procedure

Note: The power supplies are located on the left side of the machine.
Warning: You must wear anti-static wrist straps for part of this procedure.

Use the following steps to remove and replace any one of the power supplies:

1. Turn off the Lotem 800 Quantum.
2. Open the left-side door to reach the electronic tray.
3. Remove the electronic tray cover.
4. While wearing the anti-static wrist straps, unplug all the connectors on the power supplies.

5. Loosen the two (2) screws securing the tray and pull the tray out.
6. Loosen the four (4) screws securing the power supply to the tray.
7. Remove the power supply unit from the tray.
8. Attach the new power supply unit to the tray using the four screws removed in step 6.
9. Attach all the connectors.
10. Check that all connectors and wires are connected before closing the electronics box and replace any cable ties that were cut.
11. Close the electronic tray cover.
12. Resume operation.