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Model
22LN45XX 22LN450U 22LN457U (CHASSIS:LC31A LD31T)
Pages
33
Size
6.69 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
22ln45xx-22ln450u-22ln457u-chassis-lc31a-ld31t.pdf
Date
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LG 22LN45XX / 22LN450U / 22LN457U (CHASSIS:LC31A / LD31T) 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.
TUNER_EU
26     12
+3.3V_TU
C2651
20pF
50V
IF_P_MSTAR
C2626
0.1uF
16V
A_DEMODE
R2609-*1
MLG1005SR27JT
TU_I2C_FILTER
C2602
100pF
50V
C2603
0.1uF
16V
RF_SW_OPT
IF_AGC_SEL
R2636
2K
NON_A_DEMODE
C2627
100uF
16V
OPT
R2614
100K
Q2601
MMBT3906(NXP) 
A_DEMODE
E
B
C
C2643
22uF
10V
+3.3V_TU
TU_SDA
C2621
100pF
50V
+3.3V_TUNER
C2600
0.1uF
16V
TU_SIF
R2618
470
A_DEMODE
R2603
0
RF_SW_OPT
TU_CVBS
R2611
100
C2648
0.1uF
16V
C2623
0.1uF
16V
R2635
680
NON_A_DEMODE
R2870
1K
Q2600
MMBT3906(NXP) 
A_DEMODE
E
B
C
R2638
0
A_DEMODE
C2644
0.1uF
16V
C2628
100uF
16V
OPT
R2610
TU_I2C_NON_FILTER
33
C2604
0.1uF
16V
C2622
0.1uF
16V
R2610-*1
MLG1005SR27JT
TU_I2C_FILTER
TU2600
TDSS-G501D 
5
3.3V
11
DLIF[N]
2
RESET
10
DLIF_[P]
4
SDA
1
NC
9
IF_AGC
8
ALIF_[P]
3
SCL
7
1.8V
6
ALIF_[N]
12
SHIELD
A1
A1
B1
B1
+3.3V_TU
R2619
82
A_DEMODE
R2608
0
C2652
20pF
50V
TU_SCL
LNA2_CTL
R2616
4.7K
A_DEMODE
+1.8V_TUNER
R2602
0
+3.3V_TU
C2624
0.1uF
16V
OPT
C2607
20pF
50V
TUNER_RESET
IF_AGC_MAIN
+3.3V_TU
RF_SWITCH_CTL
C2646
22uF
10V
R2601
0
L2606
CIS21J121
R2871
1K
R2637
680
NON_A_DEMODE
IF_N_MSTAR
R2625
220
A_DEMODE
+3.3V_TU
R2609
TU_I2C_NON_FILTER
33
C2612
20pF
50V
DEMOD_RESET
R2624
220
A_DEMODE
This was being applied to the only china demod,
so this has to be deleted in both main and ISDB sheet. 
NETCAST4.0 EU(DVB-T/C)_TUNER_BLOCK
should be guarded by ground
Close to TUNER
close to TUNER
NC4_S7LRM
EAX65077401
2012.09.15
12.08.14 
diagonal noise improve
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.
SCART&COMP
28    12
GP4L_S7LR2
C2829
47pF
50V
COMP_ADC_FILTER
R2813
10K
SCART JACK
IC2800
SN324
SCART JACK
3
NON_INV_IN1
2
INV_IN1
4
VCC
1
OUT1
6
INV_IN2
5
NON_INV_IN2
7
OUT2
8
OUT3
9
INV_IN3
10
NON_INV_IN3
11
GND
12
NON_INV_IN4
13
INV_IN4
14
OUT4
R2814
15K
SCART JACK
C2824
33pF
SCART JACK
D2800
20V
OPT
R2854
10K
SCART JACK
C2832
47pF
50V
SCART_ADC_FILTER
JP2807
L2807
CM2012FR10KT 
COMP_ADC_FILTER_L
COMP_DET
C2811
1000pF
50V
R2819
12K
SCART JACK
R2846
2.2K
SCART JACK
R2831
10K
DTV/MNT_L_OUT
JP2808
JK2801
PSC008-01
SCART JACK
1
AUDIO_R_OUT
2
AUDIO_R_IN
3
AUDIO_L_OUT
4
AUDIO_GND
5
B_GND
6
AUDIO_L_IN
7
B_OUT
8
ID
9
G_GND
10
D2B_IN
11
G_OUT
12
D2B_OUT
13
R_GND
14
RGB_GND
15
R_OUT
16
RGB_IO
17
SYNC_GND1
18
SYNC_GND2
19
SYNC_OUT
20
SYNC_IN
21
COM_GND
22
AV_DET
R2844
10K
OPT(EU_SCART mute)
+19V_SCART
R2837
10K
SCART1_Rout
D2815
5.6V
OPT
JP2814
R2835
10K
SCART JACK
C2802
220pF
50V
OPT
C2808
4700pF
OPT
0
R2809
SCART JACK
C2817
0.1uF
50V
R2852
33K
SCART JACK
R2851
470K
OPT
L2806-*1
0
COMP_NON_ADC_FILTER
C2819
330pF
SCART JACK
D2803
20V
SCART JACK
JK2800
PPJ234-05
5A
[GN]O-SPRING
6A
[GN]E-LUG
4A
[GN]CONTACT
7B
[BL]E-LUG-S
5B
[BL]O-SPRING
7C
[RD]E-LUG-S
5C
[RD]O-SPRING_1
4C
[RD]CONTACT_1
5D
[WH]O-SPRING
4E
[RD]CONTACT_2
5E
[RD]O-SPRING_2
6E
[RD]E-LUG
SCART1_MUTE
L2808
CM2012FR10KT 
SCART_ADC_FILTER_L
R2856
200
SCART JACK
SC1_R+
COMP_Y+/AV_CVBS_IN
D2812
20V
C2834
47pF
50V
SCART_ADC_FILTER
R2838
1K
JP2801
MMBT3904(NXP)
Q2802
OPT(EU_SCART mute)
+3.3V_Normal
R2808
4.7K
SCART JACK
C2821
10uF
10V
SCART JACK
DTV/MNT_R_OUT
C2813
0.1uF
16V
R2807
75
SCART JACK
R2841
10K
L2810-*1
0
SCART_NON_ADC_FILTER
R2826
470K
R2858
100
SCART JACK
D2817
5.6V
OPT
R2802
75
SCART JACK
L2805
CM2012FR10KT 
COMP_ADC_FILTER_L
C2812
47uF
25V
SCART JACK
C2820
330pF
SCART JACK
R2850
470K
OPT
COMP_L_IN
COMP_R_IN
D2806
20V
OPT
C2825
47pF
50V
COMP_ADC_FILTER
C2823
33pF
SCART JACK
SCART1_DET
R2820
0
SCART JACK
C2833
47pF
50V
SCART_ADC_FILTER
C2814
10uF
25V
SCART JACK
Q2800
MMBT3906(NXP) 
SCART JACK E
B
C
R2839
2K
OPT(EU_SCART mute)
5.6V
OPT
D2816
SC1_R_IN
D2818
5.6V
OPT
R2804
470K
SCART JACK
R2821
200
SCART JACK
SC1_L_IN
R2828
470
SCART JACK
C2816
0.1uF
OPT(EU_SCART mute)
R2842
1K
+3.3V_Normal
Q2804
MMBT3906(NXP) 
OPT(EU_SCART mute)
1
2
3
R2840
2K
OPT(EU_SCART mute)
JP2803
+3.3V_ST
D2814
20V
L2808-*1
0
SCSRT_NON_ADC_FILTER
C2826
47pF
50V
COMP_ADC_FILTER
R2818
12K
SCART JACK
D2811
20V
SCART JACK
R2805
470K
SCART JACK
L2805-*1
0
COMP_NON_ADC_FILTER
R2833
12K
R2845
220K
SCART JACK
R2825
470K
R2812
10K
SCART JACK
D2802
20V
OPT
R2823
75
COMP_Pr+
R2849
5.6K
SCART JACK
+19V_SCART
C2804
1000pF
50V
OPT
R2824
75
R2857
360
SCART JACK
R2834
12K
C2807
4700pF
OPT
L2809-*1
0
SCART_NON_ADC_FILTER
JP2811
R2848
5.6K
SCART JACK
R2816
75
SCART JACK
R2806
75
SCART JACK
SC1_ID
JP2809
+3.3V_Normal
D2819
MMBD6100
OPT(EU_SCART mute)
A2
C
A1
SC1_FB
R2853
33K
SCART JACK
D2810
20V
OPT
DTV/MNT_VOUT
JP2802
DTV/MNT_L_OUT
JP2810
L2807-*1
0
COMP_NON_ADC_FILTER
C2815
0.1uF
50V
SCART JACK
C2800
47pF
50V
SCART JACK
C2822
10uF
10V
SCART JACK
R2810
1K
SCART JACK
DTV/MNT_R_OUT
C2827
47pF
50V
COMP_ADC_FILTER
SCART1_MUTE
JP2804
SC1_SOG_IN
D2813
20V
SB_MUTE
R2800
2K
SCART JACK
JP2805
SC1_B+
L2809
CM2012FR10KT 
SCART_ADC_FILTER_L
Q2801
MMBT3904(NXP)
SCART JACK
E
B
C
D2808
20V
OPT
C2835
47pF
50V
SCART_ADC_FILTER
R2822
75
R2803
75
SCART JACK
R2832
10K
R2829
47K
SCART JACK
L2810
CM2012FR10KT 
SCART_ADC_FILTER_L
SC1_G+
D2807
20V
OPT
D2805
20V
SCART JACK
JP2813
R2836
10K
SCART JACK
R2817
3.9K
SCART JACK
L2806
CM2012FR10KT 
COMP_ADC_FILTER_L
C2831
47pF
50V
SCART_ADC_FILTER
JP2815
C2803
1000pF
50V
OPT
C2818
0.1uF
50V
SCART JACK
R2827
180
SCART JACK
JP2800
DTV/MNT_R_OUT
R2830
15K
SCART JACK
SC1_CVBS_IN
C2828
47pF
50V
COMP_ADC_FILTER
MMBT3904(NXP)
Q2803
OPT(EU_SCART mute)
R2847
2.2K
SCART JACK
AV_CVBS_DET
SCART1_Lout
JP2812
JP2806
R2815
22
SCART JACK
DTV/MNT_L_OUT
Q2806
MMBT3906(NXP) 
SCART JACK
1
2
3
COMP_Pb+
R2855
10K
SCART JACK
C2810
1000pF
50V
D2801
20V
SCART JACK
C2830
47pF
50V
COMP_ADC_FILTER
C2809
100uF
16V
SCART JACK
R2811
75
SCART JACK
D2809
20V
OPT
C2836
47pF
50V
SCART_ADC_FILTER
D2804
20V
SCART JACK
R2843
220K
SCART JACK
MMBT3904(NXP)
Q2805
SCART JACK
C2806
1000pF
50V
SCART JACK
C2805
1000pF
50V
SCART JACK
FULL SCART
COMPONENT&CVBS
Rg
Rf
[SCART AUDIO MUTE]
SCART AMP
SCART / COMPONENT&CVBS
Gain=1+Rf/Rg
EAX65077401
2012.09.15
120927
OPT->APPLY
120927
OPT->APPLY
120927
OPT->APPLY
120927
OPT->APPLY
120927
OPT->APPLY
120927
OPT->APPLY
120927
OPT->APPLY
121107 OPT->APPLY
To solve EMS Issue
121107 OPT->APPLY
To solve EMS Issue
121107 OPT->APPLY
To solve EMS Issue
121107 OPT->APPLY
To solve EMS Issue
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