LG KU250 Service Manual - Page 108
Headset path
 |
View all LG KU250 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 108 highlights
4. TROUBLE SHOOTING 4.17 Headset path MSM6245 HPH_R, HPH_L → C402/C401 → R407/R406 → CN401 (MMI Connector) Start Connect the phone to network equipment and setup call. Setup 1KHz tone out and insert headset. Can you hear the tone? NO Sine wave appears at R407/R406? NO Change the Main board YES YES END Change the Headset - 109 -
-
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
 |
 |
4. TROUBLE SHOOTING
- 109 -
4.17 Headset path
MSM6245 HPH_R, HPH_L
→
C402/C401
→
R407/R406
→
CN401 (MMI Connector)
Start
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset.
Can you hear the tone?
Change the Headset
YES
NO
END
Sine wave appears at
R407/R406?
Change the Main board
YES
NO