Installing and Replacing Desktop Board Components
51
Installing a Front Panel Audio Solution
Figure 13-A on page 50 shows the location of the front panel audio header. Table 9 shows the pin
assignments for the front panel audio header.
Table 9. Front Panel Audio Header Signal Names (J9A2)
Pin Signal Name Pin Signal Name
1 AUD-MIC 2 AUD-GND
3 AUD-MIC-BIAS 4 AUD-VCC
5 AUD-FPOUT-R 6 AUD-RET-R
7 HP-ON 8 KEY
9 AUD-FPOUT-L 10 AUD-RET-L
To install the cable that connects the front panel audio solution to the front panel audio header,
follow these steps:
1. Observe the precautions in “Before You Begin” on page 27.
2. Turn off all peripheral devices connected to the computer. Turn off the computer and
disconnect the AC power cord.
3. Remove the cover.
4. Locate the front panel audio header. Remove the two jumpers from the header to disable the
back panel audio connectors.
5. Install a correctly keyed and shielded front panel audio cable.
6. Connect the audio cable to the front panel audio solution.
7. Replace the cover.
To restore back panel operations, follow these steps:
1. Observe the precautions in “Before You Begin” on page 27.
2. Turn off all peripheral devices connected to the computer. Turn off the computer and
disconnect the AC power cord.
3. Remove the cover.
4. Remove the front panel audio cable.
5. Install a jumper on pins 5-6 (rear R channel).
6. Install a jumper on pins 9-10 (rear L channel).
7. Replace the cover.
Connecting IEEE 1394a Headers (Optional)
Before connecting the front panel header, observe the precautions in “Before You Begin” on
page 27. See Figure 13-B for the location of the headers. Table 10 shows the pin assignments for
the optional IEEE 1394a headers.
Table 10. IEEE 1394a Header Signal Names (J9D1 and J9E1)
Pin Signal Name Pin Signal Name
1 TPA1+ 2 TPA1-
3 Ground 4 Ground
5 TPA2+ 6 TPA2-
7 +12 V 8 +12 V
9 Key (no pin) 10 Ground
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