HP dc72 HP Compaq dx7300 and dc7700 Business PC Technical Reference Guide, 1st - Page 128
Power Distribution, VDC, +5 VDC STB, +12 VC
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Power and Signal Distribution 7.3 Power Distribution The power supply assembly includes a multi-connector cable assembly that routes +3.3 VDC, +5 VDC, +5 VDC STB, +12 VC, and -12 VDC to the system board as well as to the individual drive assemblies. Figure 7-2 shows the power supply cabling for the Ultra Slim Desktop form factor. Power Supply 403777 P2 P3 5 4321 4 P3 6 P2 P1 13 1 3 P1 24 1 12 Conn P1 P1 [1] P2 P3 Pin 1 +5 aux +12 +3.3 RTN Pin 2 RTN Pin 3 + 5 +5 sns RTN RTN +5 RTN RTN Pin 4 +5 Pin 5 PS On Pin 6 RTN Pin 7 Pwr Gd Pin 8 +3.3 Pin 9 +3.3 Pin 10 Tach +5 +5 +3.3 RTN +3.3 sns +3.3 +3.3 RTN +12 VccP VccP +12 Pin 11 RTN RTN Pin 12 Fan -12 NOTES: Connectors not shown to scale. All + and - values are VDC. RTN = Return (signal ground) sns = sense GND = Power ground RS = Remote sense FO = Fan off FSpd = Fan speed FS = Fan Sink FC = Fan Command Vccp = +12 VDC for CPU [1] This row represents pins 13 - 24 of connector P1. Figure 7-2. USDT Power Cable Diagram 7-8 www.hp.com Technical Reference Guide