Power and Signal Distribution
Table
System Board Connector, Indicator, and Switch Designations
P160 | SATA power | SFF and CMT only |
P161 | SATA power |
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SW50 | Clear CMOS switch |
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XMM1 | Memory slot (black) |
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XMM2 | Memory slot (white) |
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XMM3 | Memory slot (white) | SFF & CMT only |
XMM4 | Memory slot (white) | SFF & CMT only |
XU1 | Processor socket |
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XB2 | Battery socket |
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Figure 7-5 shows pinouts of headers used on the sytem boards.
Power Button/LED, HD LED | Power Button/LED, HD LED |
Header P5 (USDT, SFF) | Header P5 (CMT) |
| HD LED + 1 |
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| 2 PS LED + |
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| HD LED Cathode 1 |
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| HD LED - 3 |
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| 4 PS LED - |
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| HD LED Anode 3 |
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| GND5 |
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| GND5 |
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| Pwr Btn 7 |
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| 8 GND |
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| M Reset 7 |
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| Chassis ID0 9 |
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| 10 Chassis ID1 |
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| +5 VDC 9 |
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| GND 11 |
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| 12 NC |
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| NC 11 |
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| Therm Diode A 13 |
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| 14 Therm Diode C |
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| GND 13 |
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| Chassis ID2 15 |
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| Front Panel Audio |
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| Chassis ID0 17 |
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| Header P23 |
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2 PS LED Cathode
4 PS LED Anode
6 Pwr Btn
8GND 10 NC 12 GND
16 +5 VDC
18 Chassis ID1
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| Mic In Left (Tip) 1 |
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| 2 Analog GND |
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| Serial Port B |
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| Header P52 |
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Mic In Right (Sleeve) 3 |
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| 4 Front Audio Detect# |
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| HP Out Right 5 |
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| 6 Sense_1 Return |
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| UART2 DTR- 1 |
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| 2 UART2 RX DATA |
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| Sense Send 7 |
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| UART2 CTS- 3 |
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| 4 UART2 DSR- |
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| HP Out Left 9 |
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| 10 Sense_2 Return |
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| UART2 TX DATA 5 |
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| 6 UART2 RI- |
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| GND 7 |
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| 8 GND |
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| Serial Port A |
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| +5.0V 9 |
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| 10 +3.3V aux |
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| UART2 RTS- 11 |
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| 12 Comm B Detect |
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| Header P54 |
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| UART2 DCD- 13 |
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| UART1 DCD- 1 |
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| 2 UART1 DSR- |
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| +12V 15 |
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| UART1 RX DATA 3 |
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| 4 UART1 RTS- |
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| UART1 TX DATA 5 |
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| 6 UART1 CTS- |
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| Hood Sense |
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| UART1 DTR 7 |
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| 8 UART1 RI- |
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| Header P125 |
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| GND 9 |
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| 10 Comm A Detect- |
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| 1 Hood SW Detect |
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| Hood Lock |
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| 2 GND |
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| 3 Hood Sensor |
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| Header P124 |
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Hood Lock 1
GND 5
2 Coil Conn
4 +12V
6 Hood Unlock
NOTE:
No polarity consideration required for connection to speaker header P6. NC = Not connected
Figure 7-3. System Board Header Pinouts
| Technical Reference Guide | www.hp.com |