Speaker Trouble - LG KG270 Service Manual
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Also See for KG270:
- Service manual (125 pages) ,
- User manual (69 pages) ,
- Manual (113 pages)
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4.12 Speaker Trouble
TEST POINT
Check Points
- Speaker spring contact
- Audio amp soldering
CIRCUIT
C116
NA
R104
C117
0.1u
SPK_N
20K
R105
C118
0.1u
SPK_P
20K
C119
0.1u
RADIO_SPK_L
LOUD_SPK_EN
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SPEAKER AMPLIFIER
R102
R103
82K
NA
U100
NCP2890AFCT2G
A3
INP
A1
INM
C3
_SD
R106
C1
BYPASS
20K
Gain : Rf/Rin
4. TROUBLE SHOOTING
L104
CN101 S 2PIN
CN200
C117
C118
SPEAKER
VBAT
C2
OUTB
A2
OUTA
B2
VM
B3
VP
D100
C120
C122
1 uF
0.1u
(2012)
(10V,K)
- 73 -
L103
CN101 S 1PIN
C120
AMP IC
R111
CN101
L103
27nH
1
L104
27nH
2
16pi 3.4T speaker
(SUSY0025801)
D101
C123
0.1u
LGE Internal Use Only
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