LG KP105 - Speaker Trouble

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 73 -
4.12 Speaker Trouble
Check Points
- Speaker Pin contact
- Audio amp soldering
TEST POINT
CIRCUIT
(1608, 10V)
SPEAKER & RECEIVER
10KR224
120KR228
R229 4.7
L201 22nH
15p
C217
C223
15p
NA
C224
R220 10K
470n
IN-
A3
VDD
VO+
B3
VO-
A1B1
_SHUTDOWN
C210
TPA6205A1ZQVRU204
BYPASS
C1
GND
B2
C2
IN+
C3
R_S_P
22nHL202
220n
VBAT
C225
R_S_N
10KR222
NA
C222
C212 470n
120KR219
C211
2.2u
R221 4.7
15p
C221
470nC215
100K
R226
SPK_P
REC_NRADIO_SPK_L
SPK_AMP_EN
REC_P
SPK_N
AUDIO AMP
(U204)
TP1
TP2
TP3
TP4
TP5
TP6
L202
L201
TP2
TP3
TP4
TP1
TP5
TP6