Service manual

GS160/320 Component Removal and Replacement 4-49
Removal
1. Open the system cabinet rear door(s).
2. If you are removing PS1,
in Figure 4–18, remove the faceplate from QBB0
and then remove the lower left EMI cover from the H-switch housing by
unscrewing the two captive screws that hold it to the housing. Check that
the Swap OK LED is lit. See Section 1.15.3.
3. If you are removing PS2,
in Figure 4–18, remove the faceplate from QBB2
and then remove the upper left EMI cover from the H-switch housing by
unscrewing the two captive screws that hold it to the housing. Check that
the Swap OK LED is lit. See Section 1.15.3.
4. Put the power enable switch on the power supply in the Off position.
5. Unscrew the four captive screws that hold it to the internal H-switch frame.
6. Grasp the two handles on the supply and pull the supply away from the
housing.
Replacement
Make sure the power enable switch on the new power supply is in the Off
position before you put it into the H-switch. Then reverse the steps outlined in
the removal procedure. Put the power enable switch in the On position after
you tighten the four captive screws.
Verification
The system should remain up and running.