Dell OptiPlex N Service Manual (.pdf) - Page 12

Computer Service, Computer Power Supply - optiplex no power

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Computer Service The following subsections provide service-related information about the computer. Computer Power Supply The Dell OptiPlex N computers have an 80-W computer power supply. The power supply can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz. The computer power supply provides the DC operating voltages and currents listed in Table 1-1. NOTE: The power supply produces DC voltages only under its loaded condition. Therefore, when you measure these voltages, the DC power connectors must be connected to their corresponding power input connectors on the system board and hard-disk drive. . Table 1-1. DC Voltage Ranges Voltage Range Maximum Output Current1 +3.3 VDC +3.135 to +3.465 VDC 6.0 A1 +5 VDC +4.75 to +5.25 VDC 12.0 A1 +12 VDC +11.40 to +12.60 VDC 1.0 A2 -12 VDC -10.80 to -13.20 VDC 0.5 A +5 VFP3 +4.75 to +5.25 VDC 1.2 A 1 The combined load on the +5-VDC and +3.3-VDC outputs should not exceed 65 W. 2 Withstands surges of up to 3.0 A to support disk start-up operations. 3 VFP (volts flea power) - sometimes called "standby power." 1-6 Dell OptiPlex N Systems Service Manual

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Dell OptiPlex N Systems Service Manual
C
omputer Service
The following subsections provide service-related information about the
computer.
Computer Power Supply
The Dell OptiPlex N computers have an 80-W computer power supply. The
power supply can operate from an AC power source of 115 VAC at 60 Hz or
230 VAC at 50 Hz. The computer power supply provides the DC operating volt-
ages and currents listed in Table 1-1.
NOTE: The power supply produces DC voltages only under its loaded condi-
tion. Therefore, when you measure these voltages, the DC power connectors
must be connected to their corresponding power input connectors on the system
board and hard-disk drive.
.
Table 1-1.
DC Voltage Ranges
Voltage
Range
Maximum Output Current
1
+3.3 VDC
+3.135 to +3.465 VDC
6.0 A
1
+5 VDC
+4.75 to +5.25 VDC
12.0 A
1
+12 VDC
+11.40 to +12.60 VDC
1.0 A
2
–12 VDC
–10.80 to –13.20 VDC
0.5 A
+5 VFP
3
+4.75 to +5.25 VDC
1.2 A
1
The combined load on the +5-VDC and +3.3-VDC outputs should not exceed 65 W.
2
Withstands surges of up to 3.0 A to support disk start-up operations.
3
VFP (volts flea power) — sometimes called “standby power.”