LG 22LD310 Service Manual page 17

TUNER
ONLY_TA
TU401
TDTC-G427D
NC
1
B1_5V
2
NC
3
SCL
4
SDA
5
B2_5V
6
NC
7
AS
8
NC
9
NC
10
AIF
11
AIF
12
13
GND
ONLY_MA
TU401-*1
TDVH-H426F
ANT_PWR
1
B1[+5V]
2
NC[RF_AGC]
3
SCL
4
SDA
5
B2[+5V]
6
NC[VTU]
7
AS
8
NC_1
9
NC_2
10
NC_3
11
AIF
12
13
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 © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5V_TUNER
R418
R423
100
C413 C417
0.1uF 0.1uF
16V 16V
R409
0
C403 C406
0.01uF 10uF
50V 10V
5V_TUNER
Near the pin
R408
0
C404 C407
0.01uF 10uF
50V 10V
R435
330
R402
330
READY
R401
C405 C402
0 47uF
0.01uF
L401 R411 50V 25V
680
820nH
READY
C755
22pF
50V
C409
R410 R413
READY
0.01uF 1.2K 0
R426
50V
R406
0 C
6.8K
BFS17W
C401
R404 B Q401
0.01uF 0
50V
R407
E
1K
READY
READY
C410
R412 R427
0.1uF
22 22
16V
Layout placement
Close to Tuner
D401 30V
12K TU_AGC
5V_M 5V_M
R432 R433
4.7K 4.7K
R415
TUNER_SCL
C411 47
47pF
50V
R414
TUNER_SDA
C412 47
47pF
50V
VIF_12V
R405
0
5V_M
5V_M TU_SW_VIF
R425
3.3K
R424
C TU_SW_VIF
10K
TU_SW_VIF
R417
B
TU_CTL_VIF
10K
E
5V_M
5V_M TU_SW_SIF
R416
3.3K
R436
10K C TU_SW_SIF
TU_SW_SIF
R403 B
TU_CTL_SIF
10K
E
PAL-BG,DK,I NTSC-M
TU_CTL_VIF High Low
TU_CTL_SIF High Low
NTSC
PAL/MULTI
Layout placement
Close to Mstar IC
5V_M
ONLY_TA
TU_SW_VIF L403
R419 K7257M
6.8K
C414
INPUT 1 4 OUTPUT1
0.01uF
TU_SW_VIF
50V TU_SW_VIF
READY
R420 D403
SWITCHING_INPUT 2
L404
6.8K KDS114E(KEC)
2.2uH
35V
TU_SW_VIF
R429
5 OUTPUT2
0
3 CHIP_CARRIER
NON_TU_SW
R430
0
2SC3875S(ALY)
Q403
5V_M
ONLY_TA
TU_SW_SIF L402
R421 K9653D
6.8K
C415
1 4
INPUT OUTPUT_1
0.01uF
TU_SW_SIF
50V TU_SW_SIF
R422
D402 2
SWITCHING_INPUT
6.8K
KDS114E(KEC)
35V
TU_SW_SIF
R428
5 OUTPUT_2
0
3
INPUT-GND/CHIP_CARRIER_GND
NON_TU_SW
R431
0
2SC3875S(ALY)
Q402
INPUT-GND
R428 R429 R430 R431
X X O O
O O X X
EAX61462901
TUNER
VIF1
VIF2
SIF1
SIF2
ONLY_MA
ONLY_MA
L402-*1
L403-*1
M9370M
M3953M
INPUT 1 4 OUTPUT_1
INPUT 1 4 OUTPUT_1
2 5 OUTPUT_2 INPUT-GND 2 5 OUTPUT_2
CHIP_CARRIER-GND
3 3 CHIP_CARRIER-GND
L403 L402
M3953 M9370
K7257 K9653
2009/08/20
4 7
LGE Internal Use Only