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7-8 www.hp.com Technical Reference Guide

Power and Signal Distribution

7.3 Powe r Dis trib u tio n

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.

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

Conn Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9

P1 +5

aux

RTN + 5 +5 PS On RTN Pwr Gd +3.3 +3.3 Tach RTN Fan

P1 [1] +12 +5 sns RTN +5 +5 +3.3 RTN +3.3 sns +3.3 +3.3 RTN -12

P2 +3.3 RTN +5 RTN +12

P3 RTN RTN RTN VccP VccP +12

Power Supply

403777

HP dx7300 User Manual

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