LG KM710 Service Manual - Page 80

Speaker/Receiver Trouble Shooting Common Path

Get LG KM710 PDF manuals and user guides View all LG KM710 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 80 highlights

4. Trouble Shooting 4.10 Speaker/Receiver Trouble Shooting (Common Path) START SPK__RCV_N SPK__RCV_P Disassemble the slide case of phone. Check the resistance between NO SPK_RCV_P & SPK__RCV_N of the Speaker With the DVM ~ 8 ohm_ Speaker has a problem. Replace the Speaker. Disconnect The F-PCB from the Main Board. YES NO Check the resistance between #37 & #38 of the F-PCB With the DVM 10 ohm Check F-PCB connector If Connector is not a problem, Change the F-PCB Check the soldering status NO Of CN801 of main -board Replace the component YES Play the Ring tone. NO Check the output(#5 & #7) of U603, 1 The signal is a digital YES Check the Speaker contact PAD of the F-PCB Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 81 - 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
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. Trouble Shooting
- 81 -
4.10 Speaker/Receiver Trouble Shooting (Common Path)
Replace the compon
ent
NO
YES
YES
Speaker has a
problem.
Replace the Speaker.
NO
NO
Check the resistance between
SPK_RCV_P & SPK__RCV_N of the Speaker
With the DVM
~ 8 ohm
_
Check F-PCB connector
If
Connector is not a
problem,
Change the F-PCB
NO
Disassemble the slide ca
se of phone.
Disconnect The F-PCB from
the Main Board.
Check the resistance between
#37 & #38 of the F-PCB
With the DVM
10
ohm
Check the soldering status
Of
CN801 of main -boar
d
Play the Ring tone.
Check the output(#5 & #7) of U603,
The signal is a
digital
Check the Speaker
contact PAD of the F-PCB
YES
START
1
SPK__RCV_N
SPK__RCV_P