LG F1200 Service Manual page 24

(7) Audio Circuits
1.5V_CORE 2.8V_DSP 2.8V_DSP
C548 C545 C544
0.1u 0.1u 0.1u
B6 E9
PS RESET_B
TP522 J6
MIDI_CS CS_B_SCS
C546
H4 H2
A(2) A2 CLKIN
J5
A(1) A1_RXD
R569
K6
AD A0_DATA_TXD C543
K7 C1
_WR 0 WR_B_SCLK LINEOUT_L
J7
_RD RD_B_SPIMODE
D(0:7)
C542
K8 F1
D0_SERINIT LINEOUT_R
J8
D1
H10
D2
H9 E2
D3 VREF
G10
D4
G9
D5
F10 D2
D6 IREF
F9
D7 U506
A1
UPD9993 SHORT_K1
TP521 E10 K1
MIDI_INT INT_SG_B SHORT_A1
F8 A10
INT_DSP_B SHORT_K10
K10
SHORT_A10
B8 B1
BCLK NC8
A8 J1
LRCLK NC9
A7 A2
ASI NC10
B7 B2
ASO NC11
J2
NC12
A5 K2
TRSCK NC13
B5 C3
CLK8K NC14
A4 D3
RDATA NC15
E3
NC16
D9 F3
VIBRATOR VIB NC17
C10 G3
LED NC18
K3 C2
PO0 TM0
J3 F2
PO1 TM1
K4 B3
PO2 TM2
J4 A3
PO3 TM3
B4
TM4
Figure 10. USB interface diagram
C534
1u
C547
1000p
DSP_RESET
1000p
MCLK
7
4.7u
C540 1u R533 15K 1
C537 1u R531 15K 5
4.7u
2
4
HP_AMP_EN
C538
220n
R536 R520 R534
C541
47K 47K
56K
220n
C511 U501
R518 R516
D1
IN-
1K 15K
0.1u
R517
C1
IN+
15K
A1
C512 C533 _SD
8200p 0.1u
SPK_EN
C532 U503
R532 R529
D1
IN-
1K 15K
0.1u
R530
C1
IN+
15K
A1
C536 C535 _SD
8200p 0.1u
Figure 11. Audio Circuit Diagram
HSOL
C568
HSOR NA
R528
62K
C569 C539
NA 1u
R527
U505
62K
MAX4684EBC
L502
C4 C2
NO1 IN1 MIDI_EN
100nH
L501
A4 A2
U504 LM4809LD
NO2 IN2
8
100nH
VDD VOUT1
C1 C3
NC1 COM1
VIN1
6 A1 A3
VOUT2 NC2 COM2
VIN2
R519
C528
3
NA
BYPASS GND 47p
9
_SHDN BGND
TPA2005D1GQYR
C525 C519
B4
VDD1 1u 10u
C4
VDD2
B1
NC
A4
VO- SPKL_N
D4
VO+ SPKL_P
C510 C524
47p 47p
TPA2005D1GQYR
C521 C520
B4
VDD1 1u 10u
C4
VDD2
B1
NC
A4
VO- SPKR_N
D4
VO+ SPKR_P
C522 C523
47p 47p
- 23 -
3. TECHNICAL BRIEF
INSTPAR
R500
HSBIAS UCLAMP0501H
330
D503
C500 C501 C576
47p 10u 10u
CN500
13
15
1
R512 100nH 2
HSMIC
3
C526 10u
R511
4
5
33
6
C527 10u R510
7
8
33
9
C529
10
47p VA509
11
VA508
AVL5M02-200
12
AVL5M02-200
C505 C506 C502
14
47p 47p 1000p
16
R507
JACK_DET
1K
R508
HOOK_DET
120
VA500 VA501
C504
AVL5M02-200 AVL5M02-200
47p
VA504
AVLC14S02050
VA505
AVL5M02-200
R501 120
JACK_TYPE
R502 120
KBR(1)
R503 120
KBR(2)
R504 120
KBR(3)
R505 120
KBC(5)
VA506
AVLC14S02050
VA507
AVLC14S02050
VA503
AVLC14S02050