Audio
itbot
Sephiroth Kwon
GGRRMMAA
26-05-2009
AUDIO
South
Audio
Bridge
codec
5-pin serial data
transaction :
BIT_CLK, SYNC, RESET,
SSDDAATTAA_IINN, SSDDAATTAA_OOUUTT
| South Bridge |
| Audio codec |
Audio Bus
Azalia
AC’97
AUDIO(Azalia) Signals Description
AUDIO(Azalia) Signals Description
AUDIO(Azalia) Signals Description
AUDIO(Azalia) Signals Description
AUDIO(Azalia) Signals Description
Repair Flow Chart
START
VViissuuaall IInnssppeeccttiioonn ffiixx aannyy ttrraaccee oorr ddaammaaggeedd OK
check no phys. damaged component
OK NG
Enable Audio setting in Bios/ OK
Check Audio setting in the
Bios/check jumper Confirm jumper setting
OK NG
Check +3VA & +3V are Fix or change any R.C. OK
CChheecckk AAuuddiioo VVoollttaaggee
ok LL.QQ. rellattedd tto VVollttage
OK NG
Check Audio CLK Change any component OK
Check Audio Clock
2244.557766MMhhzz rreellaatteedd ttoo CCLLKK
NG
OK
OK
Use meter to compare Change any component
Measure other Audio signals
other Audio signals related to NG signal
OK
NG
OK
Change Audio chip
NG
CChhange SSBB FFiiniishhedd
| ffiixx aannyy ttrraaccee oorr ddaammaaggeedd |
| component |
| Enable Audio setting in Bios/ |
| Confirm jumper setting |
| Check +3VA & +3V are |
| ok |
| Fix or change any R.C. |
| LL.QQ. rellattedd tto VVollttage |
| Check Audio CLK 2244.557766MMhhzz |
| Change any component rreellaatteedd ttoo CCLLKK |
| CChhange SSBB |
Repair Technique-Visual Inspection
Visual Inspection to check Audio
connector, Audio chipp & nearbyy related
components are not damaged.
1
Repair Technique-Check Bios & Jumper setting
Check Audio setting is enable
iinn tthhee BBiiooss.
22–11
Make sure Audio Jumper is
mmoouunntteedd pprrooppeerrllyy.
2-2
Repair Technique-Measure Audio Voltage
Use Multi-Meter to measure AUD
+5V & 3.3V.
P.S. Audio +5V is transferred by small
reggulator like 78L05 ((+12V to
33-11
AUD+5V)
33-22
Repair Technique-Measure Audio Clock
UUssee OOsscciilllloossccooppee ttoo mmeeaassuurree AAuuddiioo
CLK 24.576Mhz (from X’TAL) or
14.318Mhz (from CLK Generator)
4-1
4-2
Repair Technique-Measure Audio signals
Use Multi-Meter to measure other
AAuuddiioo ssiiggnnaallss’ bbiiaass vvoollttaaggee vvaalluuee.
(This method should be compared
with good MB)
If the symptom is still existing
please try to change Audio chip.
55 AAfftteerr cchhaannggee AAuuddiioo cchhiipp tthhee
problem is still constant please try
to change SB at last.
P.S.
AC97 Audio chip through AC97
lliinnkk ccoonnnneecctt ttoo SSBB.
HA Audio chip through Azalia link
connect to SB.
Thank You!
