LG KE990 Service Manual - Page 110

Loud speaker path voice speaker phone

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 110 highlights

4. TROUBLE SHOOTING 4.11.3 Loud speaker path (voice speaker phone) Loud speaker path as below: ESM6270 SPK_R, SPK_L → C532,C541 → R510,R516 → C533,C542 → R511,R517 → U502(audio codec) → FB500,FB501 → CN603(B°ØtoB connector) → OUT800, OUT801 (SPK PAD) → Speaker Start Conne ct th e phone to netw ork Equipm ent a nd setup call Setup 1KHz tone out Set phon e with sp eaker phone mode The sine wave appear at NO C532,C541? YES Chang e th e Main bo ard The sine wave appear at NO Check t he U502 or FB500, FB501? Chang e th e Main bo ard YES The sine wave appear at NO Check t he CN603 pads o f speaker ? YES NO Can you hea r th e ton e? Chang e th e sp eaker YES END Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 111 - LGE Internal Use Only

  • 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
- 111 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4.11.3 Loud speaker path (voice speaker phone)
Loud speaker path as below:
ESM6270 SPK_R, SPK_L
→
C532,C541
→
R510,R516
→
C533,C542
→
R511,R517
→
U502(audio
codec)
→
FB500,FB501
→
CN603(B°ØtoB connector)
→
OUT800, OUT801 (SPK PAD)
→
Speaker
Start
The sine wave
appear at
C532,C541?
Chang e th e Main bo ar
d
NO
Connect the phone to network
Equipm ent and setup call
Setup 1KHz tone out
Set phon e with sp eaker phone mode
The sine wave
appear at
FB500, FB501?
YES
Check the U502 or
Chang e th e Main bo ar
d
NO
Check the CN
603
NO
YE
S
YES
Can you hear the tone?
Change the speake
r
NO
YES
END
The sine wave
appear at
pads of speaker
?