HP Compaq dc7700 CMT, Technical Reference Manual

Page: 134 / 196

7-14 www.hp.com Technical Reference Guide
Power and Signal Distribution
NOTE:
No polarity consideration required for connection to speaker header P6.
NC = Not connected
Figure 7-8. System Board Header Pinouts
UART1 RX DATA 3
UART1 TX DATA 5
UART1 DTR 7
GND 9
4 UART1 RTS-
8 UART1 RI-
6 UART1 CTS-
10 Comm A Detect-
Serial Port A
Header P54
UART1 DCD- 1
2 UART1 DSR-
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
Hood Lock 1
GND 5
2 Coil Conn
4 +12V
6 Hood Unlock
Hood Lock
Header P124
1 Hood SW Detect
2 GND
3 Hood Sensor
Hood Sense
Header P125
HD LED + 1
HD LED - 3
GND5
2 PS LED +
4 PS LED -
8 GND Pwr Btn 7
GND 11
Therm Diode A 13
12 NC
Chassis ID0 9
14 Therm Diode C
Power Button/LED, HD LED
Header P5 (USDT, SFF, ST)
10 Chassis ID1
HD LED Cathode 1
HD LED Anode 3
GND5
M Reset 7
+5 VDC 9
2 PS LED Cathode
4 PS LED Anode
8 GND
6 Pwr Btn
10 NC
NC 11
GND 13
12 GND
Chassis ID2 15 16 +5 VDC
Power Button/LED, HD LED
Header P5 (MT, CMT)
18 Chassis ID1 Chassis ID0 17
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