Speaker Trouble - LG KE600 - Cell Phone Service Manual

5. Trouble shooting

5.6 Speaker trouble

Check Points
-Speaker spring contact
-Audio amp soldering
-analog switch soldering
2V85_IO2
TP304 11
SCL SCL
TP303 10
SDA SDA
13
ID_ENB
2
VOC
7
I2CSPI_VDD
14
I2CSPI_SEL
C369
0.1u
C320 C358
0.01u
2.2u
Checking Point
tension and dust on the
contact point
VBAT
FB309
FB310
C306 C357 4.7u
0.1u 1u C304
C310 C311
22p 22p
C361 220n
23
MONO_IN+
C362 220n
22
MONO_IN-
15
C317
MONO+
U301
47p
17
MONO-
LM4946SQX
0.068u
19
RHP3D1
C324
24
RHP3D2
8 C312 220n
RIN AMP_IN_R
5
ROUT
AMP_OUT_R
AMP_OUT_L
Check Audio
amp, In output
Check the contact spring
Check the
analog switchs
OUT301
OUT302
SNDOUT_L
SNDOUT_R
C316
47p
AMP_IN_L
FM_MAIN
AMP_IN_R
FB309
signal
U301
U302
R327 R330
- 86 -
2V85_IO2
C329
0.01u
U302
9 1 R327 0
1A 1B0 SNDOUT_L
8 2
1S 1B1 FM_L
7 3 R330 0
2S 2B0 SNDOUT_R
6 4
2A 2B1 FM_R
R331
FSA2267L10X
100K
FB310
C313
C312