4. TROUBLE SHOOTING
- 115 -
4.18.5 Microphone for Head_Set
MIC for Head_Set path as below:
Insert Headset -> EAR_SENSE_N(pin6) go 0V -> MSM6250A sense Head_Set insertion ->
MIC signal go to MSM(C226, C227) by through b-to-b connector
DAUGHTER_HEADSET
FB902
C932
47p
R903
10K
C931
47p
$V
$V
33p
C912
C916
10p
EVLC14S02050
VA900
33u
C911
33u
C907
10u
C913
33p
C914
2.2K
R907
R905
2.2K
VA902
EVLC14S02050
10p
10p
C915
C917
6
7
8
9
1
10
11
12
13
14
15
16
17
18
2
3
4
5
CN901
C-1827541
D901
MSMF05C-P
VREG_MSMP_2.7V
MICBIAS
MULTI_ADC
HP_OUT_L
HOOK_SENSE_N
HP_OUT_R
EAR_SENSE_N
MIC2N
MIC2P
FB901
Start
EAR_SENSE_N is 0V?
Yes
END
Make a call
Change the SUB b'd
Change the SUB b'd
MIC_BIAS is 1.8V ?
Change the Main B'd
Yes
OK
NO
NO
NO
Try change the head set
Near to MSM
0.1u
C228
W15
HPH_R
W17
HPH_L
W18
MICOUTN
AF18
EAR1OP
AF19
AUXIN_AUXIR
AF20
MIC1N
AF22
MICINP
AF24
CCOMP
AE19
AUXIP_AUXIL
AE20
MIC1P
AE22
MICINN
AE23
MICBIAS
AC17
EAR1ON
AC18
AUXON_AUXOR
MIC2P
AC19
AC20
MICFBP
AC21
MICFBN
AA19
MICOUTP
AA17
AUXOP_AUXOL
AA18
MIC2N
C227
22n
22n
C226
MIC2N
MIC2P
M_SPK+
M_SPK-
M_RCV-
M_RCV+
HPL_L
HPL_R
MICOUTP
MICINP
MIC1N
MICINN
MIC1P
MICFBN
MICFBP
MICOUTN
GND_RET
MICBIAS
Содержание U890
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model U890 U890c Service Manual U890 U890c ...
Страница 3: ... 4 ...
Страница 20: ...3 TECHNICAL BRIEF 21 ...
Страница 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram ...
Страница 70: ...4 TROUBLE SHOOTING 71 4 2 SIGNAL PATH ...
Страница 109: ...4 TROUBLE SHOOTING 110 CN600 50pin LCD connector CN901 C907 C911 FB901 FB902 ...
Страница 115: ...4 TROUBLE SHOOTING 116 C226 C227 for MIC serial capacitor ...
Страница 118: ...4 TROUBLE SHOOTING 119 Q400 Q401 Q402 VBATT GND ...
Страница 139: ...Table 2 1 1 RF Block Component 6 BLOCK DIAGRAM 140 ...
Страница 140: ...6 BLOCK DIAGRAM 141 6 2 Interface Diagram U890 Interface Diagram ...
Страница 142: ...6 BLOCK DIAGRAM 143 Top Side ...
Страница 143: ...6 BLOCK DIAGRAM 144 Bottom Side ...
Страница 152: ... 153 8 pcb layout ...
Страница 153: ... 154 8 pcb layout ...
Страница 154: ... 155 8 pcb layout ...
Страница 155: ... 156 8 pcb layout ...
Страница 156: ... 157 8 pcb layout ...
Страница 157: ... 158 8 pcb layout ...
Страница 163: ...9 CALIBRATION 164 9 3 HOT KIMCHI Example Choose_U890 ...
Страница 164: ...9 CALIBRATION 165 Click APPLY button Click START button ...
Страница 165: ...9 CALIBRATION 166 Click Run button to lunch RF AUTOTEST ...
Страница 167: ... 168 ...
Страница 191: ...Note ...
Страница 192: ...Note ...