Panel I/F Circuit Diagram - LG DP271, DP271B, LPA-837 Service Manual

7. PANEL I/F CIRCUIT DIAGRAM

5VD
C919 C919
10uF/16V 10uF/16V
R906 R906
10K 10K R907 R907
U902 U902
30K 30K
R908 R908
1
A OUT
VCOMO C920 C920 10K 10K
2
A- IN B OUT
10uF/16V 10uF/16V
3
A+ IN B- IN
4
GND B+ IN
R910 R910 NJM3414AM NJM3414AM
R909 R909 10K 10K
20K 20K
-10V
C923 C923
10uF/16V 10uF/16V
89P VCOM DAC OUTPUT
JK902 JK902
3.3V
1
2
3
SP_L+
4
SP_L-
5
89P_R
6
89P_G
7
89P_B
8
9
10
CPH1 SP_R+
11
STHL SP_R-
12
STHR
13
14
SP_R-
15
SP_R+
16
17
SP_L-
18
SP_L+
19
20
CON20 CON20
5VD
JK903 JK903
STVR
1
STVL
2
CKV
3
UND
4
OEV
5
6
VCOMO
7
8
LNR
9
10
OEH
11
BAT_OUT
12
13
14
PWRCTL_LCD
15
16
17
18
CON18 CON18
L909 L909 TP907 TP907
TP908 TP908 FB(1206) FB(1206)
BAT_OUT
C958 C958 C938 C938 C948 C948
10uF/16V 10uF/16V C949 C949
10uF/16V 10uF/16V
0.1uF 0.1uF 2.2uF/16V 2.2uF/16V
TP909 TP909
TP905 TP905
PWRCTL_LCD
VR901 VR901
10K 10K
R904 R904 2K 2K
1 3
R903 R903
6.8K 6.8K
8
V+
7
C921 C921 VCOM
6
10uF/16V 10uF/16V
5
TP902 TP902
TP904 TP904
TP903 TP903
L901 L901
10uH 10uH
TP901 TP901 3.3V
C912 C912
C914 C914
0.1uF 0.1uF
0.1uF 0.1uF
L907 L907 V_BIAS
FB(1206) FB(1206)
C944 C944 C945 C945 C934 C934 C932 C932 C930 C930 C931 C931
10uF/16V 10uF/16V 10uF/16V 10uF/16V 0.1uF 0.1uF 22pF 22pF 22pF 22pF 22pF 22pF
L908 L908
FB(1206) FB(1206)
AMP_VDD
C936 C936 C946 C946 C947 C947
0.1uF 0.1uF 10uF/16V 10uF/16V 10uF/16V 10uF/16V
5
IN BST
SW
R917 R917
C957 C957
10K 10K R945 R945
100K 100K 0.33uF 0.33uF 4
EN FB
R944 R944 MP2359 MP2359
10K 10K 1
Q901 Q901
SMBT3906 SMBT3906
1
Q905 Q905
R916 R916 SMBT3904 SMBT3904
10K 10K
R947 R947
R915 R915 68K 68K
10K 10K
VCOM
D901 D901 D902 D902
+15V -10V
16V 16V 10V 10V
C902 C902
C901 C901
4.7uF/25V 4.7uF/25V
4.7uF/25V 4.7uF/25V
R902 R902
R901 R901
330 330
10K 10K
D903 D903 D904 D904
C903 C903 1uF 1uF C904 C904 1uF 1uF
3 1
C905 C905 C906 C906
2 2
C907 C907 1uF 1uF C908 C908 1uF 1uF
1 3
0.1uF 0.1uF 0.1uF 0.1uF
BAT54S BAT54S BAT54S BAT54S
D905 D905 D906 D906
3 1
C909 C909 C910 C910
2 2
1 3
0.1uF 0.1uF 0.1uF 0.1uF
C911 C911
0.1uF 0.1uF BAT54S BAT54S BAT54S BAT54S
D907 D907
L902 L902 5.6uH 5.6uH
7VD5
1 2 3
C913 C913
22uF/16V 22uF/16V
1N5819 1N5819
C915 C915 C916 C916
22uF/16V 22uF/16V 22uF/16V 22uF/16V
R905 R905
10K 10K
C922 C922
0.1uF 0.1uF R911 R911
51K 51K U903 U903
MP1540 MP1540
4 3
EN FB
R912 R912
10K 10K
1
C959 C959 L905 L905 JK901 JK901
0.01uF 0.01uF
33uH 33uH
6 1
2
3 D909 D909
CON2-1.25 CON2-1.25
1N5819 1N5819 C956 C956 C960 C960 D910 D910
U904 U904 0.1uF 0.1uF 13V 13V
2.2uF/16V 2.2uF/16V
R953 R953 R948 R948
270K 270K 1K 1K D908 D908
SS5822 SS5822
R949 R949 R954 R954
6.8 1% 6.8 1% NC NC
3-45 3-46
3.3V
5VD
L910 L910
4.7uH 4.7uH
C953 C953 C950 C950 C952 C952 C954 C954
10uF/16V 10uF/16V 10uF/16V 10uF/16V 0.1uF 0.1uF 0.1uF 0.1uF
JK904 JK904
HEADER 26 SMD0.5 BOTTOM HEADER 26 SMD0.5 BOTTOM
1
2
BOUT
3
GOUT
4
ROUT
5
6
R951 R951 7
CPH1
0 0 8
9
10
STHR
11
R952 R952 STHL 12
0 0 OEH
13
MOD
14
LNR
15
MOD 16
R946 R946 17
0 0 OEV
18
UND
19
CKV
20
STVL 21
STVR
C955 C955 R950 R950 22
0/NC 0/NC
23
1.5pF 1.5pF
24
25
12212005 26
AUO A070FW03
InnoLux AT070TN04
CPT CLAA070WA03
U901 U901 PVI PW070XU3
Elite Star LR070WA01B
78L05 78L05
5VD
1
VIN VOUT
C918 C918 AMP_VDD
C917 C917
0.1uF 0.1uF 22uF/16V 22uF/16V
R929 R929 R935 R935
20k 20k 270 270
C940 C940
C942 C942
10uF/16v 10uF/16v
R_IN
1
Q904 Q904
SMBT3904 SMBT3904
10uF/16V 10uF/16V
R927 R927 R936 R936
L903 L903 7.5K 7.5K 75 75
89P_R R_IN
1.8uH 1.8uH
R943 R943 C924 C924 C928 C928
160 160 100pF 100pF 100pF 100pF
AMP_VDD
R914 R914 R930 R930
20K 20K 270 270
C943 C943
C939 C939
10uF/16V 10uF/16V
G_IN
1
Q903 Q903
SMBT3904 SMBT3904
10uF/16v 10uF/16v
L904 L904 R926 R926 R925 R925
89P_G G_IN 7.5K 7.5K 75 75
1.8uH 1.8uH
R942 R942 C927 C927 C929 C929
160 160 100pF 100pF 100pF 100pF
AMP_VDD
R939 R939 R933 R933
20k 20k 270 270
C941 C941
C937 C937
10uF/16v 10uF/16v
B_IN
1
Q902 Q902
SMBT3904 SMBT3904
10uF/16V 10uF/16V
L906 L906
89P_B B_IN R923 R923 R924 R924
1.8uH 1.8uH 7.5K 7.5K 75 75
R941 R941 C926 C926 C925 C925
160 160 100pF 100pF 100pF 100pF
AVSS 26
AVDD 25
VB
24
VG 23
VR 22
GND 21
VCC 20
CPH1
19
CPH2 18
CPH3 17
STHR 16
STHL 15
OEH 14
MOD 13
L/R 12
VCOM 11
VCOM 10
OEV 9
U/D 8
CKV 7
STVL 6
STVR
5
VGH 4
VGL 3
VCC 2
GND 1
Spec Sheet No.
V_BIAS
R940 R940
910K 910K
Vdc ROUT
R919 R919
1M 1M
V_BIAS
R937 R937
910K 910K
Vdc
GOUT
R932 R932
1M 1M
V_BIAS
R931 R931
910K 910K
Vdc BOUT
LG & MALATA LG & MALATA LG & MALATA
R920 R920
1M 1M
Document Number Document Number Document Number
09.PANEL I/F 09.PANEL I/F 09.PANEL I/F
Monday, January 15, 2007 Monday, January 15, 2007 Monday, January 15, 2007