Dell Precision 400 Service Manual (.pdf) - Page 23
DC Power Connector P1, P3, P4, P5, P6, and P9, System Overview, P2, P9
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-5 VDC (white) +5 VDC (red) common (black) +5 VDC (red) common (black) +5 VDC (red) common (black) PSON# 1 (gray) TFSC 2 (brown) +5 VDC (red) 11 12 13 14 15 16 17 18 19 20 P1 1 2 3 4 5 6 7 8 9 10 +5 VDC (red) common (black) common (black) +5 VDC (red) common (black) -12 VDC (blue) common (black) PWRGOOD 3 (orange) +12 VDC (yellow) +5 VFP (purple) 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 power-supply fan speed in special applications. 3 Pin 5 - PWRGOOD should measure between +4 and +5 VDC when the power supply is operating to indicate that all power-supply output voltages are within the ranges specified in Table 1-1. Figure 1-6. DC Power Connector P1 1234 P2, P3, P5, P6, P9 +5 VDC (red) common (black) common (black) +12 VDC (yellow) P4 12 34 +12 VDC (yellow) common (black) common (black) +5 VDC (red) Figure 1-7. DC Power Connectors P2, P3, P4, P5, P6, and P9 System Overview 1-11
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