LG KE990 Service Manual - Page 113

Microphone for main MIC

Get LG KE990 - LG Viewty Cell Phone 100 MB PDF manuals and user guides View all LG KE990 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 113 highlights

4. TROUBLE SHOOTING 4.11.4 Microphone for main MIC Main Microphone path as below: MIC → C567,C568 → ESM internal CODEC SPM0204HE5-PB-3 P G2 4 G1 O 3 2 1 MIC500 MIC C563 10u C564 47p MICBIAS C200 10p C567 22n C568 22n C569 NA MIC1N MIC1P C575 C576 33p 10p C236 0.1u C203 NA C204 NA C237 NA C235 0.1u MIC1N MIC1P C238 0.1u 10% Place near MSM pin W18 (CODEC VSS) AC22 AC21 AC19 AC20 AF19 AE19 AF21 AF22 AF20 AE20 AA20 LINE_L_IP LINE_L_IN LINE_R_IP LINE_R_IN AUXIN AUXIP MIC2N MIC2P MIC1N MIC1P CCOMP Start Make a call MIC_BIAS(R221) is 1.8V? NO YES make som e sound or voice to MIC Change the Main Bíd Can you s coping some NO sound signal at C567,C568? YES Work w ell? YES Change the MIC or Change the Main Bíd END LGE Internal Use Only - 114 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 114 -
4.11.4 Microphone for main MIC
Main Microphone path as below:
MIC
→
C567,C568
→
ESM internal CODEC
MIC
10u
C563
NA
C569
33p
C575
47p
C564
2
G1
3
G2
1
O
4
P
SPM0204HE5-PB-3
MIC500
22n
C568
22n
C567
10p
C576
MICBIAS
MIC1P
MIC1N
MSM pin W18
(CODEC VSS)
10%
Place near
0.1u
C235
AF20
MIC1N
AE20
MIC1P
MIC2N
AF21
MIC2P
AF22
AC21
LINE_L_IN
LINE_L_IP
AC22
LINE_R_IN
AC20
AC19
LINE_R_IP
AA20
CCOMP
AF19
AUXIP
AE19
AUXIN
C236
0.1u
10p
C200
0.1u
C238
C237
NA
NA
C204
C203
NA
MIC1P
MIC1N
Can you scoping some
sound signal at C567,C568?
Change the MIC or
Change the
Main Bíd
NO
YES
YES
make som e sound or
voice to MIC
Work w ell?
END
YE
S
Start
MIC_BIAS(R221) is 1.8V?
Change the Main Bí
d
NO
Make a
call