LG B2070, Руководство по обслуживанию

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3. TECHNICAL BRIEF
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3.10 Microphone
The microphone is placed to the front cover and contacted to main PCB. The audio signal is
passed to AIN2P and AIN2N pins of AD6535. The voltage supply VMIC is output from AD6537B,
and is a biased voltage for the AIN2P. The AIN2P and AIN2N signals are then A/D converted by the
voiceband ADC part of AD6537B.The digitized speech (PCM 8KHz ,16KHz) is then passed to the
DSP section of AD6527 for processing (coding, interleaving etc).
Figure 3-25 Connection between Microphone and AD6537B
C I M O T E S O L C
K 1
0 0 2 R
0 0 1
0 1 2 R
0
8 0 2 R
K 2 . 2
3 0 2 R
3 1 2 C
p 9 3
p 9 3
9 0 2 C
0 0 2 - 2 0 M 5 L V A
0 0 2 A V
p 9 3
1 0 2 C
p 9 3
4 1 2 C
C I M V _ 5 V 2
0 0 2 - 2 0 M 5 L V A
1 0 2 A V
0 1 2 C
p 9 3
0 0 1
7 0 2 R
0 0 2 C I M
L 3 3 C - 2 4 L 5 1 - 4 B O
1
2
1 1 2 C
u 1 . 0
K 2 . 2
4 1 2 R
u 0 1
2 0 2 C
N _ C I M
P _ C I M
3.11 Main Speaker
In the case of B2070, The main speaker is driven directly from AD6537B AOUT1P and AOUT1N
pins and the gain is controlled by the PGA in an AD6537B.
R E V I E C E R
R E K A E P S
L E S _ K P S
N O I T C E L E S R E K A E P S / R E V I E C E R
T U P T U O
H G I H
W O L
0 0 2 N C
1
2
6
4
1 N I
8
2 N I
1 C N
5
7
2 C N
2
1 O N
0 1
2 O N
1
+ V
2 R M 4 8 6 4 S A L N
2 0 2 U
1 M O C
3
2 M O C
9
D N G
T A B V
8 9 2 C
A N
A N
9 9 2 C
0 2 2 C
u 0 1
P _ K P S
N _ K P S
N _ C E R L E S _ K P S
P _ C E R