Av Circuit Diagram - LG DP372 Service Manual

4. AV CIRCUIT DIAGRAM

R554 R554
150 150
ASPDIF
C530 C530
100pF 100pF
L505 L505
1.8uH 1.8uH
CVBS
C505 C505 C502 C502
R536 R536 100pF 100pF 100pF 100pF
75 1% 75 1%
R522 0 R522 0
A-5V
L504 L504
FB(50)/NC FB(50)/NC
4558_VCC2
C514 C514 R544 R544
104/NC 104/NC CE517 CE517 22K 22K
47uF/10V/NC 47uF/10V/NC
C510 C510 220pF 220pF
4558_VCC2
R528 R528
CE508 CE508
R516 R516 5.1K 5.1K U504A U504A
AL 2 1 2
10uF/16V 10uF/16V 10K 10K C507 C507 3
R540 R540 TJM4558 TJM4558
4558_VCC1
100K 100K 2000pF 2000pF
R548 R548
10K 10K R527 R527 4558_VCC1
0/NC 0/NC
R509 R509
22K 22K
R549 R549
8.2K 8.2K + CE516 + CE516
C516 C516 220pF 220pF
47uF/10V 47uF/10V
4558_VCC2
R547 R547
CE509 CE509
R505 R505 5.1K 5.1K U504B U504B
AR
2 1 6
10uF/16V 10uF/16V 10K 10K
5
C525 C525 TJM4558 TJM4558
R552 R552
100K 100K 2000pF 2000pF
4558_VCC1
C506 C506
0.1uF 0.1uF
LGE Internal Use Only
L_SPEAKER
R_SPEAKER
J511 J511 COAXIAL JACK(ST-3531) COAXIAL JACK(ST-3531)
C528 C528
68pF 68pF
C524 C524 TP502 TP502
0.1uF 0.1uF A_MUTE_SW
R555 R555 Q515 Q515
100 100 C527 C527
BAT54S BAT54S
330pF 330pF
R556 R556 A+5V
10 10
--> <-->
Q509 Q509
BAT54S BAT54S
C522 C522
PJ-3513B-3531 PJ-3513B-3531
ESD(15pF/56P) ESD(15pF/56P)
J510 J510
R524 R524
10 10
A+5V C504 C504
56pF-102(EMC) 56pF-102(EMC) C526 C526
56pF-102(EMC) 56pF-102(EMC)
R532 R532
10K 10K
L_SPEAKER
ML_OUT
R510 R510 L507 L507
CE511 CE511 CE510 CE510
100 100 FB(50/600EMC) FB(50/600EMC)
1 1 2 1 2
10uF/16V 10uF/16V 10uF/16V 10uF/16V A_MUTE_SW
C503 C503
22pF 22pF
R535 R535
10K 10K
R_SPEAKER
MR_OUT
R530 R530 L508 L508
CE512 CE512 CE514 CE514
100 100 FB(50/600EMC) FB(50/600EMC)
7 1 2 1 2
10uF/16V 10uF/16V 10uF/16V 10uF/16V
4558_VCC
L502 L502
FB(50) FB(50)
C509 C509
A+5V
22pF 22pF
+ CE507 + CE507
100uF/25V 100uF/25V L503 L503
FB(50)/NC FB(50)/NC
BAT_OUT
R541 R541
10K 10K
R551 R551 5.1K 5.1K
3906 3906
1
Q514 Q514
C C
R553 R553
STANDBY B B Q513 Q513 4558_VCC
1
2N3904 2N3904
2K 2K E E
VR501 VR501
CE505 CE505 A_MUTE_SW R526 R526
1 2
1uF/50V 1uF/50V 7 1K 1K
7
6 2
6 2
1 2 CE503 CE503 5 SP_L-
5
1uF/50V 1uF/50V
4 1
4 1
3
3
R519 R519 R521 R521 C511 C511
10K 10K CE515 CE515 47K 47K NC NC
VOLUME VOLUME
1uF/50V 1uF/50V
R502 R502 10K 10K
2 1
R523 R523 10K 10K
2 1
CE513 CE513 C515 C515
R504 R504 1UF/50V 1UF/50V R542 R542
10K 10K 47K 47K NC NC
C C
R529 R529
2N3904 2N3904
B B SP_R-
1
Q501 Q501
4.7K 4.7K E E
+ CE504 + CE504
C C
R512 R512 B B 2N3904 2N3904
1
Q503 Q503
4.7K 4.7K
E E
TP501 TP501
100uF/10V 100uF/10V
SP_R- CE501 CE501
1 2
TP506 TP506
100uF/10V 100uF/10V
SP_L- CE502 CE502 1 2
R518 R518 R546 R546
1K 1K 1K 1K
A+5V
R539 R539
R550 R550 10k 10k
Q_2N3906 Q_2N3906
1
Q804 Q804
10k 10k R562 R562
R557 R557 C C
2N3904 2N3904
B B
1
Q508 Q508
R545 R545 R560 R560 10k 10k
10k 10k E E 10k 10k
C C 10k 10k
B B 2N3904 2N3904 R561 R561 C C
1
Q512 Q512 2N3904 2N3904
A_MUTE_SW 1 B B
E E Q516 Q516
R543 R543 10k 10k E E
100k 100k
ML_OUT
C C
R520 R520
2N3904 2N3904
B B
1
Q510 Q510
4.7K 4.7K E E
R538 R538
4.7K 4.7K
OFF-PAGE CONNECTION
A-5V
A-5V
A+5V
A+5V
GND
GND
POWER I/F
CVBS
CVBS
AL
AL
AR
AR
ASPDIF
ASPDIF
A_MUTE_SW
A_MUTE_SW
SP_MUTE
SP_MUTE
STANDBY
STANDBY
BAT_OUT
BAT_OUT
MPEG I/F
SP_L-
SP_L-
SP_L+
SP_L+
SP_R-
SP_R-
SP_R+
SP_R+
MR_OUT
MR_OUT
ML_OUT
ML_OUT
3-33 3-34
L509 L509 A+5V
FB(50) FB(50)
R525 R525
10K 10K
C519 C519 R515 R515
0.1uF 0.1uF + CE506 + CE506 1K 1K A+5V
22uF/16V 22uF/16V
1 5 SP_L-
Shutdown -OUT1
SP_L+
3 R507 R507 R508 R508
+OUT1
100K 100K 100K 100K
R514 R514
6
-IN1
PT2303 PT2303 100K 100K
U502 U502
16
HP-IN
PT2303 PT2303
C C
11
-IN2 D501 D501
2N3904 2N3904
C512 C512 B B 1
SP_R+ 0.1uF 0.1uF Q511 Q511
14
+OUT2
1N4148 1N4148 E E
SP_R-
12
-OUT2
8
+IN1
9
+IN2
10
VREF
SP_MUTE L514 L514
1uF/50V 1uF/50V
10uH 10uH
C523 C523
ESD(15pF) ESD(15pF)
L512 L512
FB(600) FB(600) HPJACK HPJACK
1
R534 R534
6
100 100 5
L513 L513
4
R511 R511 3
100 100
2
FB(600) FB(600)
R517 R517 R506 R506 J504 J504
1K 1K 1K 1K PHONE JACK PHONE JACK
HPJACK HPJACK
J501 J501
L511 L511
FB(600) FB(600) PHONE JACK PHONE JACK
1
6
5
4
3
2
L510 L510
FB(600) FB(600)
C508 C508 C513 C513
680pF 680pF 680pF 680pF
A+5V
Q_2N3906 Q_2N3906
1
Q805 Q805
R559 R559
10k 10k
C C
B B 2N3904 2N3904
1
Q517 Q517
E E
R558 R558
100k 100k
MR_OUT
C C
2N3904 2N3904
1 B B
Q507 Q507
E E
4
4
2,3,4,6,7,
2
2
2
2
6
6
4,6
4,6,7
7
7
7
7
8
8
Copyright © 2008 LG Electronics. Inc. All right reserved.
LG & MALATA LG & MALATA LG & MALATA
05.AV 05.AV 05.AV
Tuesday, November 20, 2007 Tuesday, November 20, 2007 Tuesday, November 20, 2007
Only for training and service purposes