IBM 31x, W2H, 32x manual On page 1-4to locate the voltage selection switch

11-9-2005
a. Unplug the connector and remove the screws that hold the power supply.
b. Lift the power supply from the unit.
	Attention
	When installing a new power supply, be sure to set the correct input
	voltage for your area or the power supply will be damaged. See
	Figure 1-3 on page 1-4to locate the voltage selection switch.
8. Remove the screws holding the riser card and then remove riser card.

Figure 2-3. Planar board assembly
9.	Using Figure 2-3or Figure 2-1 on page 2-1,remove the screws ( L) holding
	the planar board to the frame.
10.	Remove the RS-232 panel-mounted connector ( M).
11. You can now lift the planar board from the unit.
12.	To reassemble the 4810/4910 SurePOS 300, reverse this procedure.

Note: For disassembling instructions for the SureMark printer and other I/O bundled with the 4910, please refer to each device’s respective service guides.

Chapter 2. Disassembling the 4810/4910 SurePOS 300 2-3