Amplifier Circuit Diagram - LG DM5620K Service Manual

5. AMPLIFIER CIRCUIT DIAGRAM

12
11
10
C744
332
C779
332
C780
332
9
C781
332
C782
332
C783
332
C784
8
332
C785
332
C786
332
C787
332
7
GND
6
+36VP +36VP
+12VA +12VA
5
+5.6V +5.6V
GND GND
GND GND
4
AMP_SD AMP_SD
AMP-RST AMP-RST
OTW OTW
3
AMP_PROTECT AMP_PROTECT
PWM_FL- PWM_FL-
PWM_FL+ PWM_FL+
PWM_FR- PWM_FR-
2
PWM_FR+ PWM_FR+
PWM_SW- PWM_SW-
PWM_SW+ PWM_SW+
1
A B C D
+36VP
FB700
+12VA
FB220
C700
C704
104
47uF/25V
R706
OTW 100R
R707
100R
AMP_SD
R708
PWM_FL+ 100R
R709
AMP_RST 100R
R710
PWM_FL- 100R
R711
PWM_FR+ 100R
R712
PWM_FR- 100R
R704
+5V_UCOM
1k
C703
R700
R703 R705 104
10k
1k 1R
C702
AMP_PROTECT
C701
10uF/25V
R701 104
100R
Q700
R702 8550
100k
Q701
KRC103S
+36VP
DSP_VDD
IC703
KIA7027AF
GND
VCC OUT
C1E10
CY1C10
220uF/16V
105
R765 R766
R764
FB600
22K
100R
R741
OTW 100R
R742
AMP_SD 100R
R743
100R
R497 R744
NC 100R
AMP-RST
R745
100R
R746
100R
PWM_SW+
R747
100R
PWM_SW-
C746
R740
104
1R
C745
10uF/25V
E F G H I
3-29
C719
1000uF/50V
ZD700
R717
12V/0.5W
C705 R714
10R
104
10R
C713
C708 104
104
1 44
GVDD_B GVDD_A C714
2 43 333
OTW BST_A
3 42 C720
NC1 NC6
330P
4 41
NC4 PVDD-A
5 40
SD PVDD_A R719
6 39 C715 18R
PWM_A OUT_A
224
7 38
RESET_AB GND_A
8 37 C716 R718
PWM_B GND_B
224
18R
R713 9 36
22k
OC_ADJ OUT_B
C721
10 35 C709
GND PVDD_B 330P
11 34 333
AGND BST_B
C706 12 33 C710
VREG BST_C
104 333
13 32 C722
M3 PVDD_C
330P
14 31
M2 OUT_C
C717
15 30
M1 GND_C 224 R721
16 29 18R
PWM_C GND_D
17 28
RESET_CD OUT_D
C718
18 27 R720
224
PWM_D PVDD-D
18R
19 26
NC2 PVDD_D
C723
20 25
NC3 NC5 330P
C711
21 24
VDD BST_D
333
22 23
GVDD_C GVDD_D
C707 C712
104 104
R716
R715
10R
10R
C760
1000uF/50V
R752
R750
10R
10R
C754
C749 104
104
1 44
C755
GVDD_B GVDD_A
2 43 333
OTW BST_A
3 42 C761
NC1 NC6
330P
4 41
NC4 PVDD-A
5 40
SD PVDD_A R754
6 39 C756 18R
PWM_A OUT_A
224
7 38
RESET_AB GND_A
8 37 C757 R753
PWM_B GND_B
224
18R
R748 9 36
22k
OC_ADJ OUT_B
C762
10 35 C750
GND PVDD_B 330P
11 34 333
AGND BST_B
C751
C747 12 33
VREG BST_C
104 333
13 32 C763
M3 PVDD_C
330P
14 31
M2 OUT_C
C758
15 30
224 R756
M1 GND_C
16 29 18R
PWM_C GND_D
17 28
RESET_CD OUT_D
C759
18 27 R755
224
PWM_D PVDD-D
18R
19 26
NC2 PVDD_D
C764
20 25
NC3 NC5 330P
C752
21 24
VDD BST_D
22 23 333
GVDD_C GVDD_D
C753
C748
104
104
R751
R749
10R
10R
J K L M
3-30
DM-5620 IC701,IC702=TAS5342A PVDD=31.5V
DM-5520 IC701=TAS5352A,IC702=NC PVDD=34.5V
DM-5420 IC701=TAS5342LA,IC702=NC PVDD=22V
R722 R767 R768
C724
3R3 10k 10k
104
C725 DM-5320 IC701=TAS5342LA,IC702=NC PVDD=16.5V
103
L701
9.5uH/7A
1 2
C732
224 R727
3R3
C728 C736 CY23
224 104
R724
C740 2 4
102
2R2 103
C726
684
C741
R723 1 3
103
C729 C737
2R2 CY26
224
104
C733 R728
L702
102
224 3R3 22uH
9.5uH/7A
2 1 L705
1 2
L703 C734
R729
224
9.5uH/7A
3R3
C730 C738 CY27
104
224 R726
C742 102
2R2
103
C727
684
C743
R725
CY28
103
C731 C739
224
224 104
102
R730 22uH
C735
L706
224
3R3
L704
2 1
9.5uH/7A
R757
C765
3R3
104
C766
103
L707
9.5uH/7A
2 1
C771
224 R762
3R3 CY29
C769 C773
224 104 2 4
R759
C777
102
2R2 103
C767
684
1 3
C778
R758 CY30
103
C770 C774
2R2
224 104 102
C772 R763
L708
22uH
224 3R3
9.5uH/7A
L711
1 2
1 2
L709 TP15
9.5uH/7A
R760
C775
224
10k
C768
684
C776
R761
224
10k
L710
9.5uH/7A
2 1
DM5320 DM5420 DM5520 = NC
N O P Q
JK701
AMP
2012. 03. 09
R S T