Compaq dc5850 - Microtower PC - Page 83

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