HP Dc5850 Technical Reference Guide: HP Compaq dc5850 Series Business Desktop - Page 83
shows pinouts of headers used on the sytem boards.
UPC - 884962022993
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Power and Signal Distribution Figure 7-4 shows pinouts of headers used on the sytem boards. Power Button/LED, HD LED Header P5 HD LED + 1 HD LED - 3 GND5 Pwr Btn 7 Chassis ID0 9 2 PS LED + 4 PS LED - 8 GND 10 Chassis ID1 Front I/O USB Header P5 +5 V fused 1 USB port 8- 3 USB port 8+ 5 GND 7 2 +5 V fused 4 USB port 96 USB port 9+ 8 GND 10 Front USB detect# Media Card Reader USB I/F Header P150 +5 V fused 1 USB port 7- 3 USB port 7+ 5 GND 7 2 +5 V fused 4 USB port 66 USB port 6+ 8 GND 10 not connected Serial Port B Header P52 UART2 DTR- 1 UART2 CTS- 3 UART2 TX DATA 5 GND 7 +5.0V 9 UART2 RTS- 11 UART2 DCD- 13 +12V 15 2 UART2 RX DATA 4 UART2 DSR6 UART2 RI8 GND 10 +3.3V aux 12 Comm B Detect 14 -12V Front Panel Audio Header P23 Mic In Left (Tip) 1 Mic In Right (Sleeve) 3 HP Out Right 5 Sense Send 7 HP Out Left 9 2 Analog GND 4 Front Audio Detect# 6 Sense_1 Return 10 Sense_2 Return Fan Header Header P8, P16 1 GND 2 +12 VDC 3 Fan tach 4 Fan PWM input NOTE: No polarity consideration required for connection to speaker header P6. NC = Not connected Figure 7-4. System Board Header Pinouts Technical Reference Guide www.hp.com 7-9