Figure 24 shows the location of the internal headers and connectors on Intel Desktop Board DZ68BC. Figure 24. Internal Headers and Connectors Intel Desktop Board DZ68BC Product Guide Front Panel Intel HD Audio Header Figure 24, A shows the location of the front panel Intel HD Audio header. Table 6 shows the pin assignments and signal names for the front panel Intel HD Audio header. Table 6. Front Panel Intel HD Audio Header Signal Names Pin Signal Name Pin Signal Name 1 PORT 1L 2 GND 3 PORT 1R 4 PRESENCE# 5 PORT 2R 6 SENSE1_RETURN 7 SENSE_SEND 8 KEY (no pin) 9 PORT 2L 10 SENSE2_RETURN S/PDIF Header Figure 24, B shows the location of the S/PDIF output header. Table 7 shows the pin assignments and signal names for the S/PDIF connector. Table 7. S/PDIF Header Signal Names Pin Description 1 Ground 2 S/PDIF Out 3 Key (no pin) 4 +5 VDC IEEE 1394a Header Figure 24, C shows the location of the IEEE 1394a header. Table 8 shows the pin assignments and signal names for the IEEE 1394a header. Table 8. IEEE 1394a Header Signal Names Pin Signal Name Pin Signal Name 1 TPA1+ 2 TPA13 Ground 4 Ground 5 TPA2+ 6 TPA27 +12 V 8 +12 V 9 Key (no pin) 10 Ground Installing and Replacing Desktop Board Components Chassis Intrusion Header Figure 24, D shows the location of the chassis intrusion header. This header can be connected to a mechanical switch on the chassis to detect if the chassis cover is removed. This switch should be in the open position when the chassis cover is installed and closed when the cover is removed. Table 9 shows the pin assignments and signal names for the chassis intrusion header. Table 9. Chassis Intrusion Header Signal Names Pin Description 1 Ground 2 Intruder# Consumer IR (CIR) Headers The Desktop Board has two CIR headers: the input or receiver header (Figure 24, E) and the output or emitter header (Figure 24, F). The receiver header consists of a filtered translated infrared input compliant with Microsoft CIR specifications and a “learning” infrared input. The learning input is a high-pass input which the computer can use to “learn” to speak the infrared communication language of other user remotes. The emitter header consists of two output ports which the computer can use to emulate “learned” infrared commands in order to control external electronic hardware. NOTE The Consumer IR option must be enabled in the system BIOS before it can function. Press at boot to enter the system BIOS, and go to Advanced > Peripheral Configuration > Enhanced Consumer IR, and set this option to Enabled. Table 10 shows the pin assignments and signal names for the front panel CIR receiver (input) header and Table 11 shows the pin assignments and signal names for the back panel CIR emitter (output) header. Table 10. Front Panel CIR Receiver (Input) Header Signal Names Pin Signal Name Pin Signal Name 1 Ground 2 LED 3 No Connection 4 Learn-In 5 +5 V Standby 6 Vcc 7 Key (no pin) 8 CIR Input Intel Desktop Board DZ68BC Product Guide Table 11. Back Panel CIR Header Emitter (Output) Header Signal Names Pin Signal Name Pin Signal Name 1 Emitter Out 1 2 Emitter Out 2 3 Ground 4 Key (no pin) 5 Jack Detect 1 6 Jack Detect 2 Front Panel Header Figure 24, G shows the location of the front panel header. Table 12 shows the pin assignments and signal names for the front panel header. Table 12. Front Panel Header Signal Names Pin Description In/Out Pin Description In/Out Hard Drive Activity LED Power LED 1 Hard disk LED pull-up to +5 V Out 2 Front panel green LED Out 3 Hard disk active LED Out 4 Front panel yellow LED Out Reset Switch On/Off Switch 5 Ground 6 Power switch In 7 Reset switch In 8 Ground Power Not Connected 9 Power Out 10 No pin NOTE When connecting individual wires from your chassis front panel to the front panel header, be sure to observe the connection polarity. Positive wires are usually solid color and negative wires are usually white or striped. Alternate Front Panel Power LED Header Figure 24, H shows the location of the alternate front panel power LED header. Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel header. If your chassis has a three-pin power LED cable, connect it to this header. Table 13 shows the pin assignments for the alternate front panel header. Table 13. Alternate Front Panel Power LED Header Signal Names Pin Signal Name In/Out 1 Front panel green LED Out 2 No pin 3 Front panel yellow LED Out Installing and Replacing Desktop Board Components Serial Header Figure 24, I shows the location of the serial headers. Table 14 shows the pin assignments and signal names for each serial header. Table 14. Serial Port Header Pin Signal Name Pin Signal Name 1 DCD (Data Carrier Detect) 2 RXD# (Receive Data) 3 TXD# (Transmit Data) 4 DTR (Data Terminal Ready) 5 Ground 6 DSR (Data Set Ready) 7 RTS (Request To Send) 8 CTS (Clear To Send) 9 RI (Ring Indicator) 10 Key (no pin) USB 2.0 Headers Figure 24, J shows the location of the four USB 2.0 headers. Table 15 shows the pin assignme...
