Dell OptiPlex E1 Service Manual page 22

1-14 Dell OptiPlex E1 Managed PC Service Manual
+3.3 VDC +3.15 to +3.45 VDC
+5 VDC +4.75 to +5.25 VDC
+12 VDC +11.40 to +12.60 VDC
–12 VDC –10.80 to –13.20 VDC
–5 VDC –4.50 to –5.50 VDC
3 +4.75 to +5.25 VDC
+5 VFP
1
The combined load on the +5-VDC and +3.3-VDC outputs should not exceed 105 W.
2
Withstands surges of up to 11.0 A to support disk start-up operations.
3
VFP (volts flea power) — sometimes called "standby power."
The power-supply output voltages can be measured at the back (wire side) of
the connectors without disconnecting them. Figures 1-8 through 1-10 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.
12.0 A
18.0 A
3.0 A
0.3 A
0.3 A
10 mA
11 12 13 14 15 16 17 18 19 20
1 2 3 4 5 6 7 8
1
1
2
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
2
TFSC
(brown)
+5 VDC (red)
9 10
common (black)
common (black)
–12 VDC (blue)
+12 VDC (yellow)
+5 VFP (purple)