Receiver & Speaker Trouble - LG KE770 Service Manual

5. Trouble shooting
5.6 Receiver & Speaker trouble
Check Points
-Speaker spring contact
-Audio amp soldering
-analog switch soldering
2V72_IO
C267
0.1uF
C242
SPK_N
SPK_P
SPK_RCV_SEL
RCV_P
RCV_N
11
SCL SCL
10
SDA SDA
R260
U206
13
ID_ENB
100K
2
LM4946SQX
VOC
7
I2CSPI_VDD
14
I2CSPI_SEL
C270 C271
2.2u 0.068u
SPK_RCV_SWITCH
(MAIN SPEAKER & RECEIVER PATH Control)
SPK_RCV_SEL
VBAT
L
H
1u
U208
1 10
VCC NO2
2 9
NO1 COM2
3 8
COM1 IN2
4 6
IN1 NC2
5 7
NC1 GND
NLAS5223BMNR2G
VBAT
C260 C261 C262
0.1uF 1u 4.7u
23 C263 1u
MONO_IN+
22 C264 1u
MONO_IN-
15
MONO+
17
MONO-
19 C265 0.068u
RHP3D1
24 R261 4.7K
RHP3D2
8 C266 220n
RIN
5
ROUT
(3.2x1.6x1.1T)
C268
R262
C269
4.7K
C272 220n
SPK_RCV_P / N Links to
RCV_P / N
SPK_P / N
C246
27p
- 78 -
BBP_SND_L
BBP_SND_R
SPK_P
SPK_N
BBP_SND_R
100u
HS_OUT_R
100u
HS_OUT_L
BBP_SND_L
C245
L202 39p
SPK_RCV_N
27nH
C290
NA
L203
SPK_RCV_P
27nH
C250
39p