Tuner - LG 22LK230 Service Manual

TUNER

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