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4.9 Speaker Trouble
TEST POINT
U403
R413
CIRCUIT DIAGRAM
AMP_SHDN
C428
0.47u
SPK_P_ABB
SPK_N_ABB
C429
0.47u
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
R415
Figure 4.9
ACOUSTIC & MIDI
C422
NA
R410
39K
U403
TPA6205A1DRBR
1
_SHUTDOWN
VDD
2
BYPASS
VO-
R413 10K
3
IN+
VO+
4
IN-
GND
R415
10K
PGND
C432
R416
100K
220n
C434
NA
R417
39K
4. TROUBLE SHOOTING
U404
VBAT
C423
C424
2.2u
0.1u
(1608)
6
VBAT
8
SPK_P
5
SPK_N
7
9
SPK_N
SPK_RCV_N
SPK_SEL
REC_N
- 63 -
C430
C440
1u
0.1u
U404
NLAS5223BMNR2G
1
10
SPK_P
VCC
NO2
2
9
NO1
COM2
SPK_RCV_P
3
8
SPK_SEL
COM1
IN2
4
7
REC_P
IN1
NC2
5
6
NC1
GND
LGE Internal Use Only
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