LG 32LT670H-UA Service Manual page 38

RJP
+12V/+15V
Q1800
L1800
AO3407A
MLB-201209-0120P-N2
R1800 C1800
10K 2 . 2 u F
G
16V
C1801
1uF
R1801
25V
10K
OPT
JK1800
MJ-657PT-8-SD
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
12V==>5V AMP POWER
+12V/+15V
EXT_SPK
IC1801
AP1117EG-13
IN OUT
ADJ/GND
C1830 110
0 . 1 u F 330
R1831
50V R1830
EXT_SPK
EXT_SPK
EXT_SPK
C470 Close to LDO
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C1803
47uF R1802
25V 10K
R1806 510
R1804 510
R1805 510
R1807 510
R1833
10K
+5V_SUB_AMP EXT_SPK
R1834
4:C14
SUB_AMP_MUTE
4.7K
EXT_SPK
R1832
1
EXT_SPK
5%
C1831 C1832
0 . 1 u F
10uF
16V 10V
OPT
EXT_SPK
EXT_L_AMP_IN
EXT_R_AMP_IN
RJP_CTRL0
RJP_CTRL1
RJP_CTRL2
RJP_CTRL3
EXT_SPEAKER_AMP
+5V_Normal
EXT_SPK
47K
R1835
EXT_SPK
E
EXT_SPK
Q1801
IC1800
PNP
TS4962
B [EP]GND
C
EXT_SPK
R1836 STBY OUT-
1 8
4.7K
EXT_SPK
C1837
24K NC GND
0 . 1 u F 2 7
R1841
OPT 16V
EXT_SPK
EXT_SPK
R1839 IN+ VCC
1.5K C1835 1uF R1842 0
3 6
EXT_SPK
11:U22
C1833
R1837
I N - OUT+
15pF R1843 0
15 4 5
50V
EXT_SPK EXT_SPK
EXT_SPK
EXT_SPK
EXT_SPK
R1840 1.5K
C1836 1uF
11:U22
R1838 C1834
15 15pF
EXT_SPK 50V
EXT_SPK
SPEAKER OUT JACK
+5V_SUB_AMP
JK1801
PEJ027-04
C1838 C1839
1uF
0 . 1 u F
16V 3
EXT_SPK
EXT_SPK
EXT_SPK
6A
7A
4
5
EXT_OUT_L
17:Y27 7B
6B
EXT_OUT_R
17:Y26
GP3_S7LR
SIDE_JACK
+3.3V_Normal
R1827
51K
EXT_SPK
R1828 100
E_SPRING EXT_SPK_DET
T_TERMINAL1
EXT_OUT_L 3:AF8
B_TERMINAL1
C1812
39pF
R_SPRING OPT
T_SPRING
EXT_OUT_R
3:AF9
B_TERMINAL2
C1813
39pF
T_TERMINAL2 OPT
20110324
18
LGE Internal Use Only