LG 32LN549C / 32LN549E (CHASSIS:LJ3AC) Service Manual ▷ View online
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.
100pF
50V
C436
+3.5V_ST
10uF
25V
C431
10K
R426
+3.5V_ST
+24V
22uF
10V
C432
10uF
10V
C425
10K
R454
TH
ER
M
A
L
AP7173-SPG-13 HF(DIODES)
IC404
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[EP]
0.1uF
16V
C438
NCP803SN293
IC405
PWR_DET_ON_SEMI
1
GND
3
VCC
2 RESET
POWER_DET
POWER_ON/OFF_1
1/16W 330K 5%
R433
PANEL_VCC
10K
R429
NCP803SN293
IC406
PD_+24V_PWR_DET_ON_SEMI
1
GND
3
VCC
2 RESET
0.1uF
16V
C426
100
R462
PD_+24V
1/16W
27K
1%
1%
R438
10uF
10V
C418
+1.10V_VDDC
L408
0.1uF
16V
C443
NON_CI_CAP
+3.5V_ST
+1.5V_DDR
+12V
0.1uF
16V
C446
+3.3V_Normal
0.1uF
16V
C440
100K
R460
PD_+24V
33K
R435
BLM18PG121SN1D
L410
22uF
10V
C434
PANEL_CTL
001:AL22
10uF
10V
C416
560pF
50V
C433
0.1uF
16V
C417
NON_CI_CAP
+3.5V_ST
+3.5V_ST
0.1uF
16V
C419
NON_CI_CAP
10K
R430
AO3407A
Q406
G
D
S
1/16W
4.7K
1%
R437
15K
R432
0.1uF
16V
C442
4.7uF
16V
C444
FET_AOS
TJ3940S-2.5V-3L
IC402
1
GND
2 VOUT
3
VIN
0.1uF
16V
C430
10K
R452
OPT
THERMAL
TPS54319TRE
IC403
1
VIN_1
3
GND_1
7
C
O
M
P
9
SS/TR
10
PH_1
11
PH_2
12
PH_3
1
3
B
O
O
T
1
4
PW
R
G
D
1
5
EN
1
6
V
IN
_3
5
A
G
N
D
8
R
T
/C
L
K
6
V
SE
N
SE
4
GND_2
2
VIN_2
17
E
P
[G
N
D
]
100K
R457
0.1uF
16V
C421
NON_CI_CAP
+3.3V_Normal
0.1uF
C445
5.6K
R436
+12V
0.1uF
16V
OPT
C447
+3.3V_Normal
10K
R425
10K
OPT
R466
1/16W
56K
1%
1%
R439
10K
R465
OPT
+2.5V_Normal
0.1uF
16V
C441
PD_+24V
100
R461
+3.3V_Normal
22K
R458
10K
R456
1/16W
4.3K
1%
R440
22uF
10V
C439
NR8040T3R6N
3.6uH
L411
APX803D29
PWR_DET_ON_DIODES
IC405-*1
1
GND
3 VCC
2
RESET
APX803D29
PD_+24V_PWR_DET_DIODES
IC406-*1
1
GND
3 VCC
2
RESET
0.01uF
50V
C423
0.01uF
3300pF
50V
C429
3300pF
C427
1.5K
1%
R444
PD_+24V
2.7K
1%
PD_+12V
R450
0
5%
PD_+3.5V
R455
1
R434
8.2K
1%
R443
PD_+24V
0.015uF
50V
C420
0.015uF
MMBT3904(NXP)
Q407
E
B
C
MMBT3904(NXP)
Q405
E
B
C
0.33uF
16V
C422
1.2K
1%
R451
PD_+12V
AO3407A
Q408
FET_AOS
G
D
S
0.1uF
25V
C424
0.1uF
25V
C437
NON_CI_CAP
0.1uF
25V
C435
OPT
10uF
25V
OPT
C428
100
R459
FET_AOS
5.1K
1%
R451-*1
PD_KR_42_LIPS
CIS21J121
120
L409
BLM18SG700TN1D
L412
100
1%
R455-*1
PD_KR_42_LIPS
4.7K
R441-*1
PANEL_DISCHARGE_RES_4.7K
4.7K
R442-*1
PANEL_DISCHARGE_RES_4.7K
AO3435
Q408-*2
FET_2.5V_AOS
G
D
S
DMP2130L
Q408-*1
FET_2.5V_DIODE
G
D
S
2.2K
R459-*1
FET_2.5V
2.2uF
10V
C444-*1
FET_2.5V
5.6K
R441
PANEL_DISCHARGE_RES_5.6K
5.6K
R442
PANEL_DISCHARGE_RES_5.6K
22uF
10V
C448
5.1K
5.1K_PANEL_DISCHARGE
R441-*2
5.1K
5.1K_PANEL_DISCHARGE
R442-*2
10K
R413
PWM_DIM
PWM1
MLB-201209-0120P-N2
L405
+24V
10K
R418
100
T120
R420
+3.5V_ST
SMAW200-H18S1
P401
14
12V
9
24V
4
PDIM#1
18
GND
13
12V
8
GND
3
3.5V
17
GND
12
GND
7
GND
2
DRV ON
16
N.C
11
GND
6
PDIM#2
1
PWR ON
15
12V
10
24V
5
3.5V
19
.
+3.5V_ST
10K
OPT
R406
10K
R417
100
R415
MMBT3904(NXP)
Q401
E
B
C
MLB-201209-0120P-N2
L413
CIC21J501NE
L402
MMBT3904(NXP)
Q403
E
B
C
4.7K
R410
1K
R416
CIC21J501NE
L403
+3.5V_ST
+12V
0.1uF
16V
16V
C403
10K
R409
0.1uF
16V
16V
C407
+3.3V_Normal
INV_CTL
0.1uF
50V
50V
C405
RL_ON
+3.5V_ST
33K
OPT
R414
3.9K
OPT
R419
MMBT3906(NXP)
Q402
1
2
3
10K
R407
100pF
C411
10uF
25V
C402
+5V_USB
22uF
16V
OPT
C410
11K
1%
R411
56K
1%
R408
+12V
0.1uF
50V
C408
3300pF
50V
C406
10K
R405
L401
22uF
16V
C409
1uF
10V
C404
TH
ER
M
A
L
TPS54327DDAR
IC401
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
12K
1%
R412
+5V_Normal
NR8040T3R6N
3.6uH
L404
BLM18PG121SN1D
L406
68uF
35V
C401
EXT_SPK
R2
+1.5V_DDR
New item
Power_DET
+ 2 4 V - - > 3 . 7 8 V - - > 3 . 9 2 V ( 3 . 7 9 V )
+ 1 2 V - - > 3 . 5 8 V - - > 3 . 8 2 V ( 3 . 6 8 V )
+ 1 2 V - - > 3 . 5 8 V - - > 3 . 8 2 V ( 3 . 6 8 V )
Vd=550mV
+2.5V/+1.8V
R1
+3.3V_Normal
Vout=0.8*(1+R1/R2)=1.5319
Vout=0.827*(1+R1/R2)=1.225V
R1
R2
$ 0.165
S 7 L R c o r e 1 . 2 V v o l t
+ 3 . 5 V _ S T - - > 3 . 3 7 5 V - - > 3 . 4 6 V
780 mA
Max 1000mA
+ 1 8 . 5 V - - > 3 . 5 V - - > 3 . 7 5 V ( 3 . 5 9 V )
300 mA
1.5A
PANEL_POWER
3A
+ 2 0 V - - > 3 . 5 1 V - - > 3 . 7 6 V ( 3 . 5 9 V )
POWER
4
FROM LIPS & POWER B/D
LA2AW
2 0 1 2 . 0 9 . 1 1
2000 mA
R1
R2
3A
Vout=(1+R1/R2)*0.765=5.03V
+5V_USB
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.
390pF
50V
C531
0.1uF
50V
C519
10K
R502
NON_LIPS
AUD_MASTER_CLK
10uF
35V
35V
C524
12
R511
0.1uF
50V
C540
AMP_SCL
0.1uF
50V
50V
C520
10uF
10V
OPT
C511
100
R504
12
R508
10.0uH
L505
AUD_LRCH
CIS21J121
L501
10.0uH
L503
0.1uF
50V
C539
10.0uH
L504
12
R509
SPK_R-
+24V_AMP
0.1uF
50V
50V
C522
SPK_R+
100pF
50V
C503
AUD_LRCK
22000pF
50V
C527
3 . 3
OPT
R507
22000pF
50V
C526
0
LIPS_ONLY
R522
1N4148W
100V
OPT
D504
1N4148W
100V
OPT
D501
SPK_L-
33pF
50V
C507
4.7K
R519
AMP_RESET
+24V_AMP
1000pF
50V
C504
WAFER-ANGLE
P501
1
2
3
4
AUD_SCK
THERMAL
NTP-7500L
IC501
1
AGND_PLL
2
AVDD_PLL
3
DVDD_PLL
4
LF
5
DGND_PLL
6
GND_1
7
DGND
8
DVDD
9
SDATA
10
WCK
11
BCK
12
SDA
1
3
SC
L
1
4
/F
A
U
L
T
1
5
M
O
N
IT
O
R
0
1
6
M
O
N
IT
O
R
1
1
7
M
O
N
IT
O
R
2
1
8
B
ST
2B
1
9
PG
N
D
2B
2
0
O
U
T
2B
_1
2
1
O
U
T
2B
_2
2
2
PV
D
D
2_
1
2
3
PV
D
D
2_
2
2
4
PV
D
D
2_
3
25
OUT2A_1
26
OUT2A_2
27
PGND2A
28
BST2A
29
VDR2
30
AGND
31
VCC_5
32
VDR1
33
BST1B
34
PGND1B
35
OUT1B_1
36
OUT1B_2
3
7
PV
D
D
1_
1
3
8
PV
D
D
1_
2
3
9
PV
D
D
1_
3
4
0
1_
A1
T
U
O
4
1
O
U
T
1A
_2
4
2
PG
N
D
1A
4
3
B
ST
1A
4
4
/R
E
S
E
T
4
5
A
D
4
6
G
N
D
_I
O
4
7
C
L
K
_I
4
8
V
D
D
_I
O
49
[E
P
]
0.1uF
16V
C514
12
R514
33pF
50V
C509
MMBT3904(NXP)
Q501
NON_LIPS
E
B
C
10K
R521
10uF
10V
C510
4.7K
R518
+24V_AMP
SPK_L+
12
R515
0.1uF
50V
C501
1uF
25V
C529
10uF
35V
C523
1000pF
50V
C516
BLM18PG121SN1D
L502
10uF
10V
C515
SPK_L-
390pF
50V
C533
390pF
50V
C532
10.0uH
L506
100
R503
POWER_DET
AMP_SDA
0.1uF
50V
C521
1uF
25V
C528
12
R512
10K
R501
NON_LIPS
SPK_R+
1uF
25V
C534
+3.5V_ST
10uF
10V
C506
AMP_MUTE
22000pF
50V
C518
0.1uF
50V
C502
0.1uF
16V
C512
0.1uF
16V
C508
+24V
SPK_L+
+3.3V_Normal
1000pF
50V
C505
1N4148W
100V
OPT
D502
4.7K
R516
100
R506
NON_LIPS
4.7K
R517
390pF
50V
C530
SPK_R-
0.1uF
16V
C513
2
2
0
0
0
p
F
50
V
C
51
7
1N4148W
100V
OPT
D503
0.47uF
50V
C535
0.47uF
50V
C536
0.1uF
50V
C538
0.1uF
50V
C537
3.3K
R505
10K
R520
NON_LIPS
12
R510
12
R513
0.01uF
50V
OPT
C525
SPEAKER_L
SPEAKER_R
NTP-7500
Audio amp(NTP-7500)
5
LA2AW
2 0 1 2 . 0 9 . 1 1
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.
0.1uF
16V
C608
OPT
100
R603
+3.5V_ST
BLM18PG121SN1D
L601
0
R604
IR_OUT_US
47K
R610
IR_OUT
KEY2
22
IR_OUT
R601
10K
1%
R606
+3.5V_ST
IR
10K
R607
IR_OUT_EU
BLM18PG121SN1D
L603
100
R602
+3.5V_ST
100pF
50V
C607
0.1uF
C604
BLM18PG121SN1D
L602
+3.5V_ST
0.1uF
C603
1000pF
50V
C602
10K
1%
R608
0.1uF
16V
C601
IR_OUT
KEY1
+3.5V_ST
3.3K
R611
1K
R605
IR_OUT_EU
LED_R
1.5K
R615
AMOTECH CO., LTD.
5.6V
VA602
OPT
AMOTECH CO., LTD.
5.6V
VA601
OPT
5.48VTO5.76V
ZD603
OPT
2SC3052
Q601
IR_OUT_EU
E
B
C
2SC3052
Q602
IR_OUT
E
B
C
1K
R609
IR_OUT
12507WR-08L
P601
1
2
3
4
5
6
7
8
9
I R / L E D a n d c o n t r o l f o r n o r m a l m o d e ls.
LA2AW
2 0 1 2 . 0 9 . 1 1
IR/CONTROL
6
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.
1K
RGB_PC
R732
10K
R707
100
R711
DSUB_DET
JP708
0.1uF
C706
100
R710
68pF
50V
OPT
C718
5.6V
D702
AV_CVBS_IN
ADMC 5M 02 200L
5.6V
OPT
VA708
AV_CVBS_DET
AV_COMP_PC_R_IN
68pF
50V
OPT
C720
0.1uF
16V
C711
+3.3V_Normal
12K
R709
5.6V
OPT
VA707
PM_TXD
MMBD6100
RGB_PC
D710
A2
C
A1
1K
R712
5.6V
OPT
D705
AV_COMP_PC_L_IN
+3.3V_Normal
+3.3V_Normal
JP709
+3.5V_ST
470K
R702
0.1uF
C703
0.33uF
C701
470K
R703
DSUB_HSYNC
0.1uF
16V
NON_CI_CAP_RGB_PC
C724
1K
R705
DSUB_B+
DSUB_VSYNC
ADUC 20S 02 010L
20V
OPT
VA705
DSUB_G+
PM_RXD
PPJ233-01
JK701
4A
[YL]O-SPRING
5A
[YL]E-LUG
3A
[YL]CONTACT
4B
[WH]C-LUG
5C
[RD]E-LUG
4C
[RD]O-SPRING
3C
[RD]CONTACT
100pF
50V
C709
ADUC 20S 02 010L
20V
RGB_VARISTOR
VA703
0.1uF
C705
18pF
50V
NON_CI_CAP_RGB_PC
C721
0.1uF
C702
ADUC 20S 02 010L
20V
RGB_VARISTOR
VA702
2.2K
RGB_PC
R723
ADUC 20S 02 010L
20V
RGB_VARISTOR
VA704
RGB_DDC_SDA
120-ohm
L701
CDS3C30GTH
30V
OPT
OPT
D704
10K
R704
ADUC 20S 02 010L
20V
OPT
VA701
RGB_DDC_SCL
12
K
R
70
8
75
RGB_PC
R718
75
RGB_PC
R719
10K
RGB_PC
R729
220pF
50V
OPT
C710
5.6V
OPT
VA706
75
RGB_PC
R720
2.2K
RGB_PC
R724
330pF
50V
C713
0.1uF
16V
C707
BAP70-02
50V
D707
+3.5V_ST
+5V_Normal
EAN41348201
MAX3232CDR
IC701
3
C1-
2
V+
4
C2+
1
C1+
6
V-
5
C2-
7
DOUT2
8
RIN2
9
ROUT2
10
DIN2
11
DIN1
12
ROUT1
13
RIN1
14
DOUT1
15
GND
16
VCC
SPG09-DB-009
JK706
1
2
3
4
5
6
7
8
9
10
0.1uF
C704
330pF
50V
C712
120-ohm
L702
IR_OUT
5.6V
D703
F
ib
e
r
O
p
ti
c
JST1223-001
SPDIF-JACK-SOLTEAM
JK702-*1
1
GND
2
VCC
3
VINPUT
4
F
IX
_P
O
L
E
CDS3C30GTH
30V
OPT
D706
10K
R706
DSUB_R+
ci
t
p
O
r
e
bi
F
2F01TC1-CLM97-4F
SPDIF-JACK-FOXCONN
JK702
3
VIN
2
VCC
1
GND
4
D
L
EI
HS
30V
D701
18pF
50V
NON_CI_CAP_RGB_PC
C723
SPG09-DB-010
RGB_PC
JK705
1
R
ED
2
G
R
EE
N
3
B
LU
E
4
G
N
D
_1
5
D
D
C
_G
N
D
6
R
ED
_G
N
D
7
G
R
EE
N
_G
N
D
8
B
LU
E_
G
N
D
9
N
C
1
0
SY
N
C
_G
N
D
1
1
G
N
D
_2
1
2
D
D
C
_D
A
TA
1
3
H
_S
Y
N
C
1
4
V
_S
Y
N
C
1
5
D
D
C
_C
LO
C
K
1
6
SH
IL
E
D
75
R701
SPDIF_OUT
47pF
50V
C708
JP_GND1
JP_GND2
JP_GND3
JP_GND4
USB1_DM
TH
ER
M
A
L
TPS2066CDGNR
IC702
USB1&2
3
EN1
2
IN
4
EN2
1
GND
5
FLT2
6
OUT2
7
OUT1
8
FLT1
9
[EP]GND
10K
R713
/USB1_OCD
+3.3V_Normal
USB1_CTL
10uF
10V
C715
+5V_USB
/USB2_OCD
USB2_DP
0.1uF
16V
C714
10uF
10V
C722
+5V_USB_1
USB1_CTL
+5V_USB_2
+5V_USB
USB2_CTL
+5V_USB_1
AP2191DSG
EAN61849601
IC703
only USB1
3
IN_2
2
IN_1
4
EN
1
GND
5
FLG
6
OUT_1
7
OUT_2
8
NC
M
AE
RT
S
N
W
O
D
BS
U
3AU04S-305-ZC-(LG)
JK703
1
2
3
4
5
10uF
10V
C716
USB1&2
R
C
L
A
M
P0
50
2B
A
O
PT
D
70
9
U
SB
D
O
W
N
S
TR
EA
M
3AU04S-305-ZC-(LG)
JK704
USB1&2
1
2
3
4
5
USB1_DP
/USB1_OCD
+3.3V_Normal
R
C
L
A
M
P0
50
2B
A
O
PT
D
70
8
+5V_USB_2
USB2_DM
10uF
10V
C719
USB1&2
10K
R714
USB1&2
10uF
10V
C717
+5V_USB_1
RS232C
RGB PC
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 OPTIC JACK
L-MONO
Rear AV
REAR JACKS
7
LA2AW
2 0 1 2 . 0 9 . 1 1
JP_GND
USB2
OCP only for USB1
OCP for USB1/2
USB1
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