LG 32LV355C Service Manual page 24

RGB/SPDIF/PC/HP/EXT SPEAKER
New Item Development
EARPHONE BLOCK or EXTERNAL SPEAKER JACK4
HEAD_PHONE
HP_LOUT
C1118
10uF
002:U7
C1115
16V
1000pF
50V R1125
C
OPT
OPT 1K
EXT_OUT_L
Q1101
MMBT3904-(F)
009:AM21
E
HEAD_PHONE
HP_ROUT
C1119
002:U7 10uF
16V
C1116
R1128
C
1000pF 1K
OPT
EXT_OUT_R 50V
Q1102
OPT
MMBT3904-(F)
009:AM20
E
RGB PC
RGB_EEMPROM_ATMEL
RGB_EEMPROM_RENESAS IC1105
AT24C02BN-SH-T
IC1105-*1
R1EX24002ASAS0A
A0 VCC
1 8
A0 VCC
1 8
A1 W P
2 7
A1 W P
2 7
A2 SCL
3 6
A2 SCL
3 6
GND SDA
4 5
VSS SDA
4 5
C1127
18pF
50V
DSUB_VSYNC
DSUB_HSYNC
C1122
D1109
68pF
30V
50V
OPT
DSUB_B+
R1133 D1110
75 30V
DSUB_G+
R1135 D1111
75 30V
DSUB_R+
D1112
R1137
30V
75
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 © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
HEAD_PHONE_EXT_SPK
E
OPT
JK3301
B +3.3V_Normal
MMBT3904-(F) KJA-PH-0-0177
B Q1104
GND 5
C
L 4
HEAD_PHONE_EXT_SPK
R1155
1K DETECT 3
HP_DET
R 1
E
OPT
B
MMBT3904-(F)
B Q1103
C
+5V_Normal
D1115
ENKMC2838-T112
A1
C
A2
C1129
R1142
0 . 1 u F
10K
16V
EDID_WP
RGB_DDC_SCL
RGB_DDC_SDA
C1128 R1141
22 R1143
18pF
22
50V
C1126 D1116
D1113
D1114
68pF
50V 5.6V
5.6V
OPT OPT
30V
OPT
+3.3V_Normal
R1146
10K
DSUB_DET
R1147
1K
D1117
5.6V
OPT
+3.5V_ST
C
R1129
B
3.3K
SIDE_HP_MUTE AMP_RESET
OPT
Q1106
2SC3052
E
OPT
R25
EXT_AMP_MUTE
100
OPT
1K
R33
EXT_SPK
PC AUDIO
JK1102
PEJ027-01
E_SPRING
3
T_TERMINAL1
6A
B_TERMINAL1
7A
D1101
R_SPRING C1107
4
AMOTECH 100pF
5.6V 50V
OPT
T_SPRING
5
B_TERMINAL2
7B
D1102
T_TERMINAL2 C1108
6B
AMOTECH 100pF
5.6V 50V
OPT
SPDIF OPTIC JACK
5 . 1 5 M s t a r C i r c u i t A p p l i c a t i o n
SPDIF_OUT
002:T18
EXT_SPEAKER_AMP
BLM18PG121SN1D
L20
EXT_SPK
C23
EXT_SPK
0 . 1 u F
50V
IC20
TPA3124D2PWPR
R34
10K
PVCCL_1 PGNDL_2
1
24
EXT_SPK
SD PGNDL_1
2 23
PVCCL_2 LOUT
3 22
MUTE BSL
4 21
LIN AVCC_2
5 20
EXT_L_AMP_IN
RIN AVCC_1
C 6 19
EXT_R_AMP_IN
EXT_SPK
B Q20
2SC3052 BYPASS GAIN0
7 18
E
AGND_1 GAIN1
8 17
AGND_2 BSR
9 16
PVCCR_1 ROUT
C20 10 15
EXT_SPK
1uF
50V
VCLAMP PGNDR_2
11 14
EXT_SPK
PVCCR_2 PGNDR_1
C21
12 13
1uF
50V
C22
0 . 1 u F
50V
EXT_SPK
PC_R_IN 0 0 2 : S 1 2
R1107
15K
R1102
470K R1110
10K
R1108
15K
PC_L_IN
0 0 2 : S 1 2
R1103
470K
R1111
10K
+3.3V_Normal
GND
VCC
VINPUT
C1131
C1121
0 . 1 u F
100pF
16V
50V
C26
C27
0 . 1 u F
10uF
50V
35V EXT_SPK
EXT_SPK
EXT_OUT_L
EXT_SPK EXT_SPK EXT_SPK
L22
EXT_SPK 22.0uH C28 C30
R31
1uF 0 . 4 7 u F
4.7K
50V 50V
C24 EXT_SPK
0 . 2 2 u F
EXT_SPK
50V EXT_SPK
C29
R32
1uF
4.7K
50V
EXT_OUT_R
R27
10K
R29
OPT
10K
OPT
R30
10K
EXT_SPK
EXT_SPK
C25
0 . 2 2 u F
50V
GP2R 20101023
RGB/SPDIF/HP 9
LGE Internal Use Only