Audio - LG GD510 Service Manual

3. Technical brief
GD510 Operational Description

3.12. Audio

GD510 Audio signal flow diagram as following diagram.
PMB8877
3.12.1. Audio amplifier
Audio amplifier sub system IC is an audio power amplifier capable of delivering 1.2 W of continuous
average power into a mono 8
single-ended (SE) loads. The MAX9877 features a 32-step digital volume control and ten distinct output
modes. The digital volume control, output modes (mono/SE/OCL) are programmed through a two-wire
I2C interface that allows flexibility in routing and mixing audio channels.
LG Electronics
LGE Internal Use Only
BBP
BT+FM
Figure 16 Audio signal flow diagram
load, 50mW per channel of continuous average power into stereo 32
C205
C214
1u
1u
A4
C1N
C215
1u
A5
C1P
U202
C223 1u
D1
BB_SND_R
INA2
MAX9877AEWP_TG45
C206 1u
D2
BB_SND_L INA1
C1
FM_SND_R
INB2
C2
FM_SND_L
INB1
B2
BIAS
B3
I2C_SDA
SDA
C3
I2C_SCL
SCL
R202 8.2 D4
EAR_P
RXIN+
R203 8.2
B4
EAR_N
RXIN-
C208
1u
Figure 17 Audio amplifier PMIC
MAX
9877
VBAT
FB201
220
MPZ1608S221A
C213
1u
A1
HPR
A2
HPL
D5
OUT+
B5
OUT-
C210 C211
27p 27p
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Revision A
MIC
SPK
RCV
MUIC
HSO_R
HSO_L
SPK_RCV_P
SPK_RCV_N
LGE Property
Only for training and service purposes