LG 22LK230, Service Manual

Page: 14 / 36

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_SDA
TUNER_SCL
5V_TUNER
0.01uF
C401
50V
PRE-AMP
0.01uF
C409
50V
PRE-AMP
0.01uF
C414
50V
VIF2
VIF1
SIF2
SIF1
TU_AGC
D401 30V
R411
680
PRE-AMP
0.01uF
C404
50V
C413
0.1uF
16V
ONLY_MA
C417
0.1uF
16V
ONLY_MA
R418
100
R423
12K
C411
47pF
50V
C412
47pF
50V
R415
47
R414
47
C410
0.1uF
16V
READY
C407
10uF
10V
L403
K7257M
ONLY_TA
2 SWITCHING_INPUT
1
INPUT
5
OUTPUT2
4
OUTPUT1
3 CHIP_CARRIER
L404
2.2uH
READY
L401
PRE-AMP
820nH
R432
4.7K R433
4.7K
5V_M 5V_M
L402-*1
M9370M
ONLY_MA
2 INPUT-GND
1 INPUT
5 OUTPUT_2
4 OUTPUT_1
3 CHIP_CARRIER-GND
L403-*1
M3953M
ONLY_MA
2 INPUT-GND
1 INPUT
5 OUTPUT_2
4 OUTPUT_1
3
CHIP_CARRIER-GND
Q401
BFS17W
PRE-AMP
E
B
C
R404
0
PRE-AMP(TA)
R412
22
PRE-AMP
R427
22
READY
C755
22pF
50V
READY
R444
0
READY
R445
0
READY
L402
K9362M
ONLY_TA(NO_SW)
2 INPUT-GND
1 INPUT
5 OUTPUT2
4 OUTPUT1
3
CHIP_CARRIER-GND
R417
10K
TU_SW_VIF
R429
0
TU_SW_VIF
R424
10K
TU_SW_VIF
5V_M
5V_M
Q403
2SC3875S(ALY)
TU_SW_VIF
E
B
C
TU_CTL_VIF
D403
35V
KDS114E(KEC)
TU_SW_VIF
R425
3.3K
TU_SW_VIF
R419
6.8K
TU_SW_VIF
5V_M
R420
6.8K
TU_SW_VIF
R430
0
NO_SW_VIF
R403
0
No PRE-AMP
5V_M
R409
0
PRE-AMP
TU401
TDTK-G701D
ONLY_TA
5
B+[+5V]
11
AIF-
2
NC_2
10
NC_6
4
RF_AGC
1
NC_1
9
NC_5
8
NC_4
3
NC_3
7
SCL
6
SDA
12
SHIELD
TU401-*1
TDTK-H701F
ONLY_MA
5
B+[+5V]
11
DIF[-]/AIF-
2
NC_2
10
NC_6
4
RF_AGC
1
NC_1
9
NC_5
8
NC_4
3
NC_3
7
SCL
6
SDA
12
SHIELD
R410
220
PRE-AMP(TA)
R406
1.5K
PRE-AMP
R407
820
PRE-AMP
0.01uF
C415
50V
5V_M
R421
6.8K
TU_SW_SIF
R422
6.8K
TU_SW_SIF
R416
3.3K
TU_SW_SIF
R443
10K
TU_SW_SIF
Q402
2SC3875S(ALY)
TU_SW_SIF
E
B
C
R436
10K
TU_SW_SIF
5V_M
TU_CTL_SIF
5V_M R428
0
TU_SW_SIF
D402
35V
KDS114E(KEC)
TU_SW_SIF
R431
0
NO_SW_SIF
L402-*2
K9653D
ONLY_TA(SW)
2
SWITCHING_INPUT
1 INPUT
5 OUTPUT_2
4 OUTPUT_1
3
INPUT-GND/CHIP_CARRIER_GND
Near the pin
NTSC
PAL(w/o NT)
L403 L402
K7257 K9653
TUNER
EAX64207701 2011/5/6
4 7
TUNER
M3953
Layout placement
Close to Tuner
Close to Mstar IC
Layout placement
PAL-BG,DK,I NTSC-M
High Low TU_CTL_VIF
M9370
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