Pin Assignments For The Dc Power Connectors; Figure 1-18. Dc Power Connector P1; Figure 1-19. Dc Power Connectors P2 (Midsize And Mini Tower Chassis); P3, P4, P5, P6, And P9 (All Optiplex Gxa Chassis) - Dell OptiPlex GXa Service Manual

Pin Assignments for the DC Power Connectors

The power-supply output voltages can be measured at the back (wire side) of the connectors
without disconnecting them. Figures 1-18 through 1-20 show the wire side of the
connectors.
–5 VDC (white)
common (black)
common (black)
common (black)
1
PSON# (gray)
P1
+5 VDC (red)
common (black)
+5 VDC (red)
common (black)
3
PWRGOOD (orange)
1
Pin 11 — PSON# should measure between +4 and +5 VDC except when the power button
on the front panel is pressed, taking PSON# to its active-low state.
2
Pin 19 — Thermal fan-speed control (TFSC) is a power-supply input signal used to control
the power-supply fan speed.
3
Pin 5 — PWRGOOD should measure between +4 and +5 VDC when the power supply is on
and operating to indicate that all power-supply output voltages are within ranges specified
in Table 1-4.

Figure 1-18. DC Power Connector P1

1 2 3 4
Figure 1-19. DC Power Connectors P2 (Midsize and Mini Tower Chassis); P3,
P4, P5, P6, and P9 (All OptiPlex GXa Chassis)
11 12 13 14 15 16 17 18 19 20
1 2 3 4 5 6 7
P2, P3, P5, P6, P9
+5 VDC (red)
common (black)
common (black)
+12 VDC (yellow)
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
2
TFSC
(brown)
+5 VDC (red)
8 9 10
common (black)
common (black)
–12 VDC (blue)
+12 VDC (yellow)
+5 VFP (purple)
P4
1 2 3 4
+12 VDC (yellow)
common (black)
common (black)
+5 VDC (red)
System Overview 1-25