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Audio. Sephiroth Kwon GRMA 26-05-2009. AUDIO. Audio codec. South Bridge. 5-pin serial data transaction : BIT_CLK, SYNC, RESET, SDATA_IN, SDATA_OUT. Audio Bus. Azalia. AC’97. AUDIO(Azalia) Signals Description. AUDIO(Azalia) Signals Description. AUDIO(Azalia) Signals Description.

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  1. Audio Sephiroth Kwon GRMA 26-05-2009

  2. AUDIO Audio codec South Bridge • 5-pin serial data transaction : • BIT_CLK, SYNC, RESET, • SDATA_IN, SDATA_OUT

  3. Audio Bus Azalia AC’97

  4. AUDIO(Azalia) Signals Description

  5. AUDIO(Azalia) Signals Description

  6. AUDIO(Azalia) Signals Description

  7. AUDIO(Azalia) Signals Description

  8. AUDIO(Azalia) Signals Description

  9. Repair Flow Chart START Visual Inspection check no phys. damaged OK fix any trace or damaged component OK NG Check Audio setting in the Bios /check jumper OK Enable Audio setting in Bios/ Confirm jumper setting OK NG Check Audio Voltage OK Check +5VA & +3V are ok Fix or change any R.C. L.Q. related to Voltage OK NG Check Audio Clock OK Change any component related to CLK Check Audio CLK 24.576Mhz or 14.3M NG OK OK Measure other Audio signals Use meter to compare other Audio signals Change any component related to NG signal OK NG OK Change Audio chip NG Change SB Finished

  10. Repair Technique-Visual Inspection Visual Inspection to check Audio connector, Audio chip & nearby related components are not damaged. 1

  11. Repair Technique-Check Bios & Jumper setting Check Audio setting is enable in the Bios. 2-1 Make sure Audio Jumper is mounted properly. 2-2

  12. Repair Technique-Measure Audio Voltage Use Multi-Meter to measure AUD +5V & 3.3V. P.S. Audio +5V is transferred by small regulator like 78L05 (+12V to AUD+5V) 3-1 3-2

  13. Repair Technique-Measure Audio Clock Use Oscilloscope to measure Audio CLK 24.576Mhz (from X’TAL) or 14.318Mhz (from CLK Generator) 4-1 4-2

  14. Repair Technique-Measure Audio signals Use Multi-Meter to measure other Audio signals’ bias voltage value. (This method should be compared with good MB) If the symptom is still existing please try to change Audio chip. After change Audio chip the problem is still constant please try to change SB at last. P.S. AC97 Audio chip through AC97 link connect to SB. HA Audio chip through Azalia link connect to SB. 5

  15. Thank You!

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