Dell OptiPlex Gxi - Manual (Page 32)

1-14 Dell OptiPlex GXi Systems 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 1-11 through 1-13 show the
wire side of the connectors.
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 1-1.
Figure 1-11. DC Power Connector P1
Figure 1-12. DC Power Connectors P2 (Midsize and Mini Tower),
P3, P4, P5, P6, and P9
11
1
PWRGOOD
3
(orange)
–12 VDC (blue)
+12 VDC (yellow)
+5 VFP (purple)
common (black)
2 3 4 5 6 7 8 9 10
12 13 14 15 16 17 18 19 20
P1
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
common (black)
common (black)
common (black)
PSON# 1 (grey)
common (black)
common (black)
common (black)
–5 VDC (white)
TFSC 2
(brown)
1 2 3 4
+5 VDC (red)
common (black)
common (black)
+12 VDC (yellow)
1 2 3 4
+5 VDC (red)
common (black)
common (black)
+12 VDC (yellow)
P2, P3, P5, P6, P9
P4