Dell XPS 420 (Late 2007) - Manual (Page 165)

Removing and Installing Parts
165
DC Power Connector P15 (For 425-W PSU Only)
NOTE:
The P15 connector is intended for use with the PCI Express graphics cards
whose power requirements exceed 75 watts.
Removing the Power Supply
1 Follow the procedures in "Before You Begin" on page 99.
2 Remove the computer cover (see "Removing the Computer Cover" on
page 101).
NOTICE:
Note the location and ID of each power connector before disconnecting
the power supply cables.
3 Follow the DC power cables that stem from the power supply and
disconnect each connected power cable.
NOTE:
Note the routing of the power cable bundles as you disconnect them.
You must route these cables properly when you replace them to prevent them
from being pinched or crimped.
4 Remove the four screws that attach the power supply assembly to the back
of the chassis.
Pin Number Signal Name 18-AWG Wire Color
1 +12 VC DC Blue/White
2 +12 VC DC Blue/White
3 +12 VC DC Blue/White
4 COM Black
5 COM Black
6 COM Black
1 2 3
4 6 5
book.book Page 165 Tuesday, November 27, 2007 10:29 AM