Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3-25
3-26
3. HP/SPK AMP CIRCUIT DIAGRAM
L:MUTE
H:ACTIVE
(500ms Fade On)
Headphone max volume
Headphone and speaker difference
Power ON / OFF Mute
L:MUTE
H:ACTIVE
F/W control
SPK_L+
SYS_MUTE
SPK_R+
RHPIN
RLINEIN
LLINEIN
LHPIN
SPK_R-
SPK_L-
VOL
HP-ROUT
SYS_MUTE
VOL
6019_RIN
VR_Rout
6019_RIN
6019_LIN
6019_LIN
VR_Lout
SPK_R+
HP1_DET
HP2_DET
SPK_L+
HP_L_OUT
SPK_R-
SPK_L-
HP_R_OUT
SYS_MUTE (14)
IO_MUTE (19)
OP_OUT_L
OP_OUT_R
GNDA
+5V_AUD
GNDA
GNDA
GNDA
+5V_AUD
+5V_AUD
+5V_AUD
+5V_AUD
+5V_AUD
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
+3.3V_SYS
GNDA
+5V_AUD
GNDA
GNDA
GNDA
GNDA
+5V_V
+5V_SYS_A
GND_DC
GND_DC
GNDA
GNDA
GND_DC
VPORT0603102MV05
C347
R229
100K/F/0402
R237
49.9K/F/0402
L100
NC/10UH/1.49A/D63CB
C290
1U/16V/0603
+
D13
1N4148
A
K
R284
0/J/0603
R222
NC/2.2M/F/0402
C368
0.1U/25V/0402
TC1
47U/10V/B
R270
100K/F/0402
R225
100K/F/0402
C367
0.1U/25V/0402
+
EC8
100U/16V/6.3*5.7/S
R81
0/J/0402
R283
0/J/0603
Q26
BAV70-F
K
A
J
C343
NC/1U/16V/0603
R288
0/F/1206
R223
100K/F/0402
+
D15
1N4148
A
K
R282
0/J/0603
R236
100/J/0402
SW2
VR/50K/5PIN
1
2
3
4
5
G1
G2
1
2
3
4
5
G1
G2
C361
NC/1U/16V/0603
VPORT0603102MV05
C348
R226
100K/F/0603
C281
10U/10V/0805
C360
NC/1U/16V/0603
R281
0/J/0603
C302
NC
NC
C349
C287
1U/16V/0603
C286
0.1U/25V/0402
R128
1K/F/0402
EC13
220U/10V/6.3*7.7/S
1
2
R231
2.2M/F/0402
L81
0/J/0603
R234
100K/F/0402
C369
0.1U/25V/0402
R286
0/J/0402
C288
33N/16V/0402
R230
NC
R239
10K/J/0402
L102
NC/10UH/1.5A/DS75LC
C342
NC/1U/16V/0603
EC2
220U/6.3V/6.3*5.3/S
1
2
R267
47K/F/0402
C278
0.1U/25V/0402
L95
0/J/0603
C100
33N/16V/0603
C370
0.1U/25V/0402
NC
C350
U12
EUA6019
6
5
1
2
3
4
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
RIN
RLINEIN
PGND1
ROUT-
PVDD1
RHPIN
VDD
LIN
LLINEIN
LHPIN
PVDD2
LOUT-
PGND2
LOUT+
SHOTDOWN
FADE
BYPASS
AGND
SEMAX
SEDIFF
VOLUME
HP/ LINE
SE/BTL
ROUT+
GND
R126
1K/F/0402
C298
1U/16V/0603
C334
NC/10U/10V/0805
TP91
Reset
C289
33N/16V/0402
R287
0/J/0402
EC1
220U/6.3V/6.3*5.3/S
1
2
R82
0/J/0402
C99
33N/16V/0603
Q33
PMBS3904
B
E
C