LG 55LS645H (CHASSIS:LB2AW) 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.
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.
4.7K
R383
AMP_MUTE
NEC_RX
22
R397
EXT5V_CTRL
10K
R381
CLOCK
FLMD0
AMP_RESET
NEC_DBG_TX
NEC_IR
+3.5V_ST
+3.5V_ST
22
R370
+5V_ST
2SA1504S
Q310
CLOCK
E
B
C
SCART1_MUTE
10K
R382
CLOCK
4.7K
R373
R373
CLOCK
2SA1504S
Q308
CLOCK
E
B
C
22
R350
PKLCS1212E4001-R1
BU300
BUZZER
1
2
22
R331
OPT
22
R398
MICOM_RESET
EEPROM_SW
22
R313
POWER_ON/OFF_1
22
R327
+3.5V_ST
22uF
25V
25V
3 . 3 V t o 5 V
C303
10K
CLOCK
R303
22
R346
TOOL1
UART_DBG_SW
4.7K
R372
CLOCK
22
R328
+5V_ST
+5V_ST
0
R362
22
R319
22
R367
OPT
22
R322
MICOM_RESET
POWER_DET
22
R351
10K
R379
CLOCK
0
R334
13pF
C305
TOOL0
4.7K
R371
CLOCK
22
R399
CEC_REMOTE_NEC
UART_SW2
10K
NON_CLOCK
R302
13pF
C307
4.7K
R384
RL_ON
22
R325
22
OPT
R324
22
R337
CLOCK_SDA
PANEL_CTL
BLM18PG121SN1D
L302
CLOCK
+5V_ST
MST_NEC_TX
22
R366
22
R344
MODEL1_OPT_2
10MHz
X300
47K
R352
22
R332
FLMD0
22
R329
CLOCK_SCL
MST_NEC_RX
+3.5V_ST
+3.5V_ST
2 . 2 u F
10V
10V
3 . 3 V t o 5 V
C302
2SA1504S
Q309
CLOCK
E
B
C
JTP-1127WEM
SW300
1
2
4
3
22
R357
22
R368
TOOL0
22
R321
OPT
IR_OUT_CTRL
22
R369
2SA1504S
Q307
CLOCK
E
B
C
SIDE_HP_MUTE
THERMAL
SC632ULTRT
3 . 3 V t o 5 V
IC300
3
C1-
2
C1+
4
IN
1
GND
5
EN
6
OUT
7
C2+
8
C2-
9
[EP]GND
22
R316
NEC_TX
NEC_DBG_RX
2 . 2 u F
10V
10V
3 . 3 V t o 5 V
C301
10K
R378
CLOCK
+3.5V_ST
LED_R/BUZZ
EXT_PWR_DET
22
OPT R318
22
R355
4.7K
R312
MODEL1_OPT_0
22
R353
22
R336
22
R330
INV_CTL
22
R354
4.7K
R310
KEY1
EXT12V_CTRL
2SA1504S
Q306
CLOCK
E
B
C
+5V_ST
22
OPT
R356
TOOL1
0
R361
22
R323
BLM18PG600SN1D
L301
UART_SW1
22uF
25V
25V
3 . 3 V t o 5 V
C300
1M
R345
SUB_AMP_MUTE
+5V_ST
12507WS-06L
P300
1
2
3
4
5
6
7
22
R365
KEY2
NEC_EEPROM_SCL
NEC_EEPROM_SDA
10K
R333
OPT
DBG_SW
KID65003AF
IC303
CLOCK
3
I 3
2
I 2
4
I 4
1
I 1
6
I 6
5
I 5
7
I 7
8
GND
9
COMMON
10
O7
11
O6
12
O5
13
O4
14
O3
15
O2
16
O1
22
R360
100K
R348
22
R349
22
R320
UPD78F1164GF(S)
NEC_MICOM
IC301
1
P60/SCL0
2
P61/SDA0
3
P62
4
P63
5
P31/TI03/TO03/INTP4
6
P64/RD
7
P65/WR0
8
P66/WR1
9
P67/ASTB
10
P77/EX23/KR7/INTP11
11
P76/EX22/KR6/INTP10
12
P75/EX21/KR5/INTP9
13
P74/EX20/KR4/INTP8
14
P73/EX19/KR3
15
P72/EX18/KR2
16
P71/EX17/KR1
17
P70/EX16/KR0
18
P06/WAIT
19
P05/CLKOUT
20
EVSS1
21
P80/EX0
22
P81/EX1
23
P82/EX2
24
P83/EX3
25
P84/EX4
26
P85/EX5
27
P86/EX6
28
P87/EX7
29
P30/INTP3/RTC1HZ
30
EVDD1
31
P50/EX8
32
P51/EX9
33
P52/EX10
34
P53/EX11
35
P54/EX12
36
P55/EX13
37
P56/EX14
38
P57/EX15
39
P17/EX31/TI02/TO02
40
P16/EX30/TI01/TO01/INTP5
41
P15/EX29/RTCDIV/RTCCL
42
P14/EX28/RXD3
43
P13/EX27/TXD3
44
P12/EX26/SO00/TXD0
45
P11/EX25/SI00/RXD0
46
P10/EX24/SCK00
47
AVREF1
48
P110/ANO0
49
P111/ANO1
50
AVREF0
51
AVSS
52
P157/ANI15
53
P156/ANI14
54
P155/ANI13
55
P154/ANI12
56
P153/ANI11
57
P152/ANI10
58
P151/ANI9
59
P150/ANI8
60
P27/ANI7
61
P26/ANI6
62
P25/ANI5
63
P24/ANI4
64
P23/ANI3
65
P22/ANI2
66
P21/ANI1
67
P20/ANI0
68
P130
69
P131/TI06/TO06
70
P04/SCK10/SCL10
71
P03/SI10/RXD1/SDA10
72
P02/SO10/TXD1
73
P01/TO00
74
P 0 0 / T I 0 0
75
P145/TI07/TO07
76
P144/SO20/TXD2
77
P143/SI20/RXD2/SDA20
78
P142/SCK20/SCL20
79
P141/PCLBUZ1/INTP7
80
P140/PCLBUZ0/INTP6
81
P120/INTP0/EXLVI
82
P47/INTP2
83
P46/INTP1/TI05/TO05
84
P45/SO01
85
P44/SI01
86
P43/SCK01
87
P42/TI04/TO04
88
P41/TOOL1
89
P40/TOOL0
90
RESET
91
P124/XT2
92
P123/XT1
93
FLMD0
94
P122/X2/EXCLK
95
P121/X1
96
REGC
97
VSS
98
EVSS0
99
VDD
100
EVDD0
+3.5V_ST
22
R326
10K
R358
4.7K
R374
R374
CLOCK
22
R347
74LX1G14CTR
IC302
BUZZER
3
GND
2
1A
4
1Y
1
NC
5
VCC
+3.5V_ST
2 . 2 u F
10V
10V
C308
10K
R380
CLOCK
BLM18PG600SN1D
3 . 3 V t o 5 V
L300
4.7K
R376
CLOCK
+5V_ST
SOC_RESET
/PI_RESET_NEC
CEC_ON/OFF
12507WR-12L
P301
CLOCK
1
2
3
4
5
6
7
8
9
10
11
12
13
MODEL1_OPT_1
MODEL1_OPT_2
MODEL1_OPT_0
MODEL1_OPT_1
10K
OPT
R308
10K
OPT
R309
10K
OPT
R311
10K
OPT
R317
0.1uF
16V
C304
0.1uF
16V
C306
0 . 1 u F
16V
16V
C309
BUZZER
MMBT3904(NXP)
Q301
CLOCK
E
B
C
MMBT3904(NXP)
Q302
CLOCK
E
B
C
MMBT3904(NXP)
Q303
CLOCK
E
B
C
MMBT3904(NXP)
Q304
CLOCK
E
B
C
MMBT3904(NXP)
Q305
CLOCK
E
B
C
5V_ON/OFF
22
R315
5V_ON/OFF
10K
R300
3 . 3 V t o 5 V
SIGN190368
MODEL_OPT_3
MICOM MODEL OPTION
Closed to Crystal
S t e p U p r e g u l a t o r 3 . 3 V t o 5 V ( M A X 2 5 0 m A )
MODEL OPTION
78
HIGH
80
MODEL_OPT_2
MODEL_OPT_0
PIN NAME
79
MODEL_OPT_1
PIN NO.
LOW
2 0 1 1 . 0 8 . 2 1
3 2 0
EMEA INTERACTIVE
SUB MICOM
GP4_MSTAR
CLOCK
OPT
OPT
OPT
OPT
NON_CLOCK
C a n n o t u s e G P I O - P 6 2 , P 6 3
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.
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.
1uF
25V
25V
EXT_SPK
C1709
+5V_SUB_AMP
EXT_SPK_DET
EXT_SPK_R-
EXT_SPK_R+
TPA6011A4PWPRG4
EXT_SPK
IC1700
3
PVDD_1
2
ROUT-
4
RHPIN
1
PGND_1
6
RIN
5
RLINEIN
7
VDD
8
LIN
9
LLINEIN
10
LHPIN
11
PVDD_2
12
LOUT-
13
PGND_2
14
LOUT+
15
SHUTDOWN
16
FADE
17
BYPASS
18
AGND
19
SEMAX
20
SEDIFF
21
VOLUME
22
HP/LINE
23
SE/BTL
24
ROUT+
39pF
OPT
OPT
C1704
1uF
10V
EXT_SPK
C1703
EXT_SPK_L-
100
EXT_SPK
R1719
EXT_SPK_L+
1K
EXT_SPK
R1700
+5V_SUB_AMP
1K
EXT_SPK
R1714
10K
EXT_SPK
R1715
4.7K
EXT_SPK
R1718
+5V_Normal
39pF
OPT
OPT
C1707
100
OPT
R1716
R1716
EXT_AMP_R_IN
+3.3V_Normal
1K
EXT_SPK
R1713
EXT_SPK_L-
39pF
OPT
OPT
C1706
EXT_AMP_L_IN
1K
EXT_SPK
R1701
EXT_SPK
L1703
51K
OPT
R1702
22uF
16V
16V
EXT_SPK
C1700
1uF
10V
EXT_SPK
C1702
BLM18PG121SN1D
EXT_SPK
L1704
EXT_SPK_L+
+3.5V_ST
EXT_SPK
L1702
+5V_SUB_AMP
100
EXT_SPK
R1705
EXT_SPK_R-
3.3K
EXT_SPK
R1712
100
EXT_SPK
R1711
39pF
OPT
OPT
C1708
P E J 0 2 9 - 0 2
EXT_SPK
JK1700
3
E_SPRING
6
T_TERMINAL
7
B_TERMINAL
5
T_SPRING
4
R_SPRING
8
G_SPRING
EXT_SPK
L1701
0
EXT_SPK
R1708
0 . 1 u F
EXT_SPK
C1701
EXT_SPK
L1700
EXT_SPK_R+
100
EXT_SPK
R1717
SUB_AMP_MUTE
NEC_DBG_TX
+3.5V_ST
0
R1707
DBG_RX
100
R1721
0 . 1 u F
C1711
3.6K
R1709
UART_DBG_SW
+3.5V_ST
0 . 1 u F
C1705
MST_DBG_TX
0
R1725
3.6K
R1710
0
R1706
100
R1704
MST_DBG_RX
DBG_SW
DBG_RX
NEC_DBG_RX
DBG_TX
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1702
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
DBG_TX
+3.5V_ST
EXT_VOL-
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1705
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1701
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
EXT_VOL+
+3.5V_ST
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1706
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
+3.5V_ST
4.7K
R1724
0
OPT
R1723
0 . 1 u F
C1712
UART_RX
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1703
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
100
R1727
I2C_SDA
MST_DBG_TX
I2C_SCL
UART_SW1
NEC_RX
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1710
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
+3.5V_ST
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1709
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
0
OPT
R1729
MST_NEC_TX
UART_SW2
1uF
50V
50V
C1714
NEC_EEPROM_SCL
22
R1731
100
R1728
0
OPT
R1722
100
R1720
NEC_EEPROM_SDA
EEPROM_SW
+3.5V_ST
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1704
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
UART_RX
UART_TX
+3.5V_ST
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1708
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
NEC_TX
MST_TX
0
OPT
R1730
MST_RX
MST_DBG_RX
UART_TX
0 . 1 u F
C1710
EEPROM_SDA
ON SEMICONDUCTOR
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
IC1707
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
100
R1726
MST_NEC_RX
0 . 1 u F
C1713
EEPROM_SCL
P E J 0 2 7 - 0 4
JK1701
6B T_TERMINAL2
7B B_TERMINAL2
5 T_SPRING
4 R_SPRING
7A B_TERMINAL1
6A T_TERMINAL1
3 E_SPRING
MMBT3904(NXP)
EXT_SPK
Q1700
E
B
C
4.7K
EXT_SPK
R1703
400mA
CONNECTION
UART/I2C SWITCH
L
H
EXT_SPK_CONTROL/DEBUG
EXT_SPK AMP
EXT_SPK OUT
A - B 0
H
CONNECTION
L
UART_SW1
A - B 1
L
H
CONNECTION
MSTAR DEBUG
MSTAR ADJ
UART_SW2
A - B 0
A - B 1
INTERACTIVE
NEC USB_DOWNLOAD
UART_SW
A - B 0
A - B 1
NEC DEBUG
MSTAR DEBUG
A - B 0
A - B 1
DEBUG_NEC/MSTAR
H
DBG_SW
L
EXT_SPK CONTROL
CONNECTION
A - B 0
A - B 1
NEC-EEPROM
H
EEPROM_SW
L
MSTAR-EEPROM
CONNECTION
EMEA INTERACTIVE
GP4_MSTAR
2 0 1 1 . 0 8 . 2 1
EXT SPK
1 7 2 0
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.
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.
M41T83RMY6F
IC1801
RTC
3
NF_2
2
NF_1
4
NC_2
1
NC_1
6
DU
5
RST
7
SQW
8
VBAT
9
VSS
10
SDA
11
SCL
12
IRQ1/FT/OUT
13
NC_3
14
IRQ2
15
VCC
16
NF_3
17
NV_4
18
NC_4
CLOCK_SDA
BATTERY
BA1800
RTC
1
2
+3.5V_ST
+3.5V_ST
33
R1807
RTC
1K
R1801
RTC
+3.5V_ST
22uF
16V
16V
OPT
C1811
CLOCK_SCL
33
R1808
RTC
10K
OPT
R1814
EXT_5V
0 . 1 u F
50V
POWER_OUT
C1807
150K
POWER_OUT
R1802
1/16W
270K
1%
POWER_OUT
R1816
3 . 3 u F
50V
50V
POWER_OUT
C1810
1/8W
200K
1%
POWER_OUT
R1809
EXT_12V
22uF
25V
25V
POWER_OUT
C1806
1/16W
20K
1%
POWER_OUT
R1815
MBRA340T3G
POWER_OUT
D1800
+24V
22
POWER_OUT
R1810
100K
POWER_OUT
R1804
0 . 1 u F
50V
50V
POWER_OUT
C1812
22UH
POWER_OUT
L1802
+12V
1/16W
10K
1%
POWER_OUT
R1817
THERMAL
MP4460DQ-LF-Z
POWER_OUT
IC1802
3
EN
2
SW_2
4
COMP
1
SW_1
5
FB
6
GND
7
FREQ
8
VIN_1
9
VIN_2
10
BST
11
EP_GND
0 . 1 u F
50V
POWER_OUT
C1803
18K
POWER_OUT
R1800
2.4K
POWER_OUT
R1821
200
POWER_OUT
R1822
100K
POWER_OUT
R1823
0 . 1 u F
16V
16V
OPT
C1815
100
POWER_OUT
R1806
1/16W
1.2K
POWER_OUT
R1819
EXT_PWR_DET
CB3216PA501E
POWER_OUT
L1800
43
POWER_OUT
R1820
+12V
EXT_12V
0 . 1 u F
50V
50V
POWER_OUT
C1817
EXT12V_CTRL
MP5000DQ
POWER_OUT
IC1803
3
ENABLE/FAULT
2
DV/DT
4
I-LIMIT
1
GND
5
NC
6
SOURCE_1
7
SOURCE_2
8
SOURCE_3
9
SOURCE_4
10
SOURCE_5
11
VCC
1K
POWER_OUT
R1818
CB3216PA501E
POWER_OUT
L1804
THERMAL
TPS54327DDAR
IC1800
POWER_OUT
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
0 . 1 u F
50V
POWER_OUT
C1805
12K
1%
POWER_OUT
R1805
BLM18PG121SN1D
POWER_OUT
L1803
22uF
16V
16V
POWER_OUT
C1808
56K
1%
POWER_OUT
R1811
3300pF
50V
50V
POWER_OUT
C1801
NR8040T3R6N
3.6uH
POWER_OUT
L1801
11K
1%
POWER_OUT
R1812
1uF
10V
10V
POWER_OUT
C1800
10K
POWER_OUT
R1813
22uF
16V
16V
POWER_OUT
C1804
100pF
POWER_OUT
C1814
+12V
EXT5V_CTRL
EXT_5V
10uF
25V
25V
C1816
POWER_OUT
150pF
50V
50V
POWER_OUT
C1802
0 . 1 u F
16V
C1809
RTC
470pF
50V
50V
POWER_OUT
C1813
D1801
A2
C
A1
APX803D29
POWER_OUT
IC1804
1
GND
3
VCC
2
RESET
REAL TIME CLOCK(RTC)
c l o s e t o p i n
S w i t c h i n g n o i s e r e d u c i n g [ M P S r e c o m m e n d ]
EXTERNAL_POWER DETECTION
EXTERNAL_POWER OUT 5V/12V
$ 0 . 2 1
EMEA INTERACTIVE
GP4_MSTAR
2 0 1 1 . 0 8 . 2 1
EXT_POWER
1 9 2 0
Vout=(1+R1/R2)*0.765=5.03V
c l o s e I C 1 8 0 0
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