Read LG 22LN4500 (CHASSIS:LD31A) Service Manual 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.
TUNER_NON_EU
26 12
SIGN1501491
R3782
2K
2K
OPT
R3714
0
NON_LN4500 ASIA
C3738
0.1uF
16V
0.1uF
16V
C3742
20pF
50V
20pF
50V
BR(TU_I2C_FILTER)
TU_GND_A
Q3703
MMBT3906(NXP)
BR(TU_BUFFER_VIDEO)
E
B
C
+3.3V_TU
+3.3V_TU
TU3704-*1
TDSN-T601F
(OPT)SI2178_TW_2INPUT_H
1
RF_S/W_CTL
2
RESET_TUNER
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
IF_AGC
10
DIF[P]
11
DIF[N]
12
NC_1
13
NC_2
14
NC_3
15
GND
16
NC_4
17
NC_5
18
NC_6
19
NC_7
20
NC_8
21
NC_9
22
NC_10
23
NC_11
24
NC_12
25
NC_13
26
NC_14
27
NC_15
28
SHIELD
A1
A1
B1
B1
C3703
0.1uF
16V
OPT
+3.3V_TU
C3716
0.1uF
16V
HALF_NIM
C3743
20pF
50V
20pF
50V
BR(TU_I2C_FILTER)
C3737
100pF
50V
100pF
50V
TU_CVBS
IF_N_MSTAR
R3801-1*
47
47
BR(FULL_NIM_D_DEMODE_47)
C3707
100pF
50V
100pF
50V
Q3705
MMBT3906(NXP)
(OPT)TU_BUFFER_SIF
E
B
C
R3802-1*
47
47
BR(FULL_NIM_D_DEMODE_47)
LNA_CTRL_1
+3.3V_TU
TU3700-*1
TDSS-G501D(B)
(ASIA_M33)SI2176_ATSC_1INPUT_H
5
3.3V
11
DLIF_[N]
2
RESET
10
DLIF_[P]
4
SDA
1
NC_1
9
IF_AGC
8
NC_3
3
SCL
7
1.8V
6
NC_2
12
SHIELD
A1
A1
B1
B1
R3740-*3
2.2K
BR(TU_IIC_2.2K)
C3702
0.1uF
16V
BR
R3733
100K
R3753
4.7K
(OPT)TU_BUFFER_SIF
LNA_CTRL_2
R3804
0
0
(OPT)FULL_NIM_D_DEMODE_0
R3732
100
100
TUNER_RESET
R3780
3.3
3.3
OPT
TU_SCL
R3803
0
0
(OPT)FULL_NIM_D_DEMODE_0
+3.3V_TUNER
R3803-*1
47
47
BR(FULL_NIM_D_DEMODE_47)
R3804-*1
47
47
BR(FULL_NIM_D_DEMODE_47)
+3.3V_TU
BR_RESET_DEMOD
R3735
NON_BR(TU_I2C_NON_FILTER)
33
R3801
0
0
(OPT)FULL_NIM_D_DEMODE_0
TU_GND_A
R3749
0
BR(TU_BUFFER_VIDEO)
TU3702
TDSH-G501D(B)
TDSH-G501D(B)
(ASIA_LN4xxx)ISOLATOR_DVB_1INPUT_H
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+B2[1.8V]
6
SIF
A1
A1
B1
B1
A2
A2
B2
B2
+3.3V_TU
R3796
2.2K
2.2K
(OPT)TW_FE_LNA
TU_GND_A
R3775
0
0
BR(TU_NON_BUFFER_SIF)
R3741
1.8K
KR/US(TU_IIC_ATSC_1.8K)
C3708
0.1uF
16V
16V
R3802
0
0
(OPT)FULL_NIM_D_DEMODE_0
C3706
100uF
16V
16V
OPT
R3799
10K
BR(FULL_NIM)
C3753
0.1uF
16V
(OPT)TW_FE_LNA
C3701
0.1uF
16V
0.1uF
16V
BR(RF_SW_OPT)
C3754
0.1uF
16V
0.1uF
16V
BR(FULL_NIM)
C3705
100uF
16V
16V
OPT
C3723
22uF
10V
22uF
10V
R3704
100
HALF_NIM
FE_TS_SYNC
FE_TS_VAL_ERR
C3725
0.1uF
16V
16V
R3784
0
BR
R3741-*1
1K
ASIA(TU_IIC_NON_ATSC_1K)
C3750
5pF
50V
OPT
5pF
50V
OPT
R3741-*3
2.2K
BR(TU_IIC_2.2K)
IF_P_MSTAR
R3797
2.2K
2.2K
(OPT)TW_FE_LNA
R3715
0
NON_LN4500 ASIA
R3798
1K
BR(FULL_NIM)
C3751
5pF
50V
5pF
50V
OPT
R3783
0
BR
TU3704
TDSN-T701F(B)
(OPT)SI2178_TW_LNA_2INPUT_H
1
RF_S/WCTL
2
RESET
3
SCL
4
SDA
5
B1[+3.3V]
6
SIF
7
B2[1.8V]
8
CVBS
9
IF_AGC
10
DIF[P]
11
DIF[N]
12
NC_1
13
NC_2
14
NC_3
15
GND
16
NC_4
17
NC_5
18
NC_6
19
NC_7
20
NC_8
21
NC_9
22
NC_10
23
NC_11
24
NC_12
25
NC_13
26
NC_14
27
NC_15
A1
59
LNA_CTRL_1
57
LNA_CTRL_2
58
A1
B1
SHIELD
B1
+1.8V_TUNER
R3760
10
KR/US(HALF_NIM)
FE_TS_DATA[0]
R3761
10
KR/US(HALF_NIM)
R3750
1K
OPT
R3751
220
BR(TU_BUFFER_VIDEO)
R3774
470
(OPT)TU_BUFFER_SIF
470
(OPT)TU_BUFFER_SIF
TU_SIF
+3.3V_TU
TU3703
TDSN-B601F(B)
(BR)SI2178_BR_2INPUT_H
1
RF_S/W_CTL
2
RESET_TUNER
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
NC_1
10
NC_2
11
NC_3
12
+B3[3.3V]
13
+B4[1.23V]
14
RESET_DEMOD
15
GND
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
DATA
21
NC_4
22
NC_5
23
NC_6
24
NC_7
25
NC_8
26
NC_9
27
NC_10
28
SHIELD
A1
A1
B1
B1
R3762
2K
2K
OPT
+1.23V_TUNER
R3756
0
(OPT)TU_NON_BUFFER_VIDEO
R3740-*1
1K
ASIA(TU_IIC_NON_ATSC_1K)
C3715
22uF
10V
22uF
10V
C3727
0.1uF
16V
RF_SWITCH_CTL
R3740
1.8K
KR/US(TU_IIC_ATSC_1.8K)
R3752
220
BR(TU_BUFFER_VIDEO)
C3710
0.1uF
16V
FE_TS_CLK
R3758
82
82
BR
IF_AGC_MAIN
TU_GND_A
R3781
3.3
OPT
C3718
0.1uF
16V
BR(FULL_NIM)
TU_SDA
R3736
NON_BR(TU_I2C_NON_FILTER)
33
C3752
0.1uF
16V
(OPT)TW_FE_LNA
TU_GND_A
R3705
0
BR(RF_SW_OPT)
L3703
UBW2012-121F
L3706
120OHM
BR(FULL_NIM)
L3707
R3761-*1
10
10
ASIA(HALF_NIM/IF_FILTER)
R3760-*1
10
10
ASIA(HALF_NIM/IF_FILTER)
R3736-*1
BR(TU_I2C_FILTER)
R3735-*1
BR(TU_I2C_FILTER)
C3713-*1
20pF
50V
20pF
50V
BR(TU_I2C_FILTER)
C3711-*1
20pF
50V
20pF
50V
BR(TU_I2C_FILTER)
C3711
18pF
50V
18pF
50V
NON BR(TU_I2C_NON_FILTER)
C3713
18pF
50V
18pF
50V
NON BR(TU_I2C_NON_FILTER)
TU3700
TDSS-H501F(B)
(KR/US)SI2158_ATSC_1INPUT_H
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC_1
9
IF_AGC
8
NC_3
3
SCL
7
+B2[1.8]
6
NC_2
12
SHIELD
A1
A1
B1
B1
GLOBAL tuner block except EU and China
NC4_S7LRM
EAX65077302
2012.11.18
1. should be guarded by ground
2. No via on both of them
3. Signal Width >= 12mils
Signal to Signal Width = 12mils
Ground Width >= 24mils
2. No via on both of them
3. Signal Width >= 12mils
Signal to Signal Width = 12mils
Ground Width >= 24mils
BRAZIL(WITH AD)
0
Pull-up can’t be applied
because of MODEL_OPT_2
because of MODEL_OPT_2
0
TUNER MULTI-OPTION
close to TUNER
1
close to TUNER
Size change,0929
60mA
HPF
ASIA,M33 (WO AD)
0
TW_FE_LNA FILTER_SETTING
should be guarded by ground
GND seperation for ASIS tuner
12.08.14
diagonal noise improve
diagonal noise improve
ASIA,LN4xxxx(WO AD)
close to TUNER
54MHz~350MHz
TAIWAN(WITH AD)
KR/US(WO AD)
121118
TU3700-*1 TDSS-H101F DEL
TU3700-*2 TDSS-G501D ->TU3700-*1
TU3700-*1 TDSS-H101F DEL
TU3700-*2 TDSS-G501D ->TU3700-*1
LPF
CTRL_2
0
CTRL_1
350Hz~450MHz
Close to the tuner
1
450Hz~870MHz
Filter_Type
Through
TAIWAN (WITH AD)
close to the tuner pin, add,09029
Add,0929
Frequence
close to TUNER
121118
SS BEAD->SUNLORD BEAD
SS BEAD->SUNLORD BEAD
121118
R3705 1K->0
R3800 DEL
R3705 1K->0
R3800 DEL
121118
SS BEAD->SUNLORD BEAD
SS BEAD->SUNLORD BEAD
121118
SS BEAD->SUNLORD BEAD
SS BEAD->SUNLORD BEAD
121220
US(+3.3V_TU Pull-up) 1.2K->1.8K
US(+3.3V_TU Pull-up) 1.2K->1.8K
130118
option DEL
option DEL
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