LG KG271 - Speaker Trouble

4. TROUBLE SHOOTING
- 73 -
4.12 Speaker Trouble
Check Points
- Speaker spring contact
- Audio amp soldering
TEST POINT
CIRCUIT
SPEAKER
(SUSY0025801)
(2012)
Gain : Rf/Rin
SPEAKER AMPLIFIER
(10V,K)
16pi 3.4T speaker
C118 0.1u
VBAT
0.1uC119
L103 27nH
R108
82K
R103
NA
C120
1 uF
VP
B3
C3
_SD
27nHL104
U100 NCP2890AFCT2G
BYPASS
C1
A1
INM
INP
A3
OUTA
A2
C2
OUTB
VM
B2
B1
VM_P
C123
0.1u
0.1uC117
diode
D101
R102
82K
20K
R105
20K
R106
20K
R104
D100
diode
R110
100K
C122
0.1u
CN101
1
2
C121 0.22u
NAC116
RADIO_SPK_L
LOUD_SPK_EN
SPK_N
SPK_P
CN200
L103
CN101íS 2PIN
CN101íS 1PIN
L104
AMP IC
C120
C117
C118
R111