LG 43LF5400-UB Service Manual page 28

TUNER for ATSC W/O Isolator
A1
A1
47
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TU501
TDJH-H301F
+3.3V
1
NC_1
2
DIF_AGC
3
SCL_RF
4
SDA_RF
5
DIF[P]
6
DIF[N]
7
SIF
8
CVBS
9
B1
B1
SHIELD
+3.3V_TU
C503
C500
100pF 0.1uF
50V 16V
close to the tuner pin
should be guarded by ground
C502
0.1uF
16V
AR500
33
1/16W
C501 C504
15pF 15pF
50V 50V
R501
33 IF_P_MSTAR
1/16W
5%
R500
33
IF_N_MSTAR
1/16W
5%
Close to the tuner
L15_M1L
TUNER
3.3V_NORMAL -> 3.3V_TU
+3.3V_NORMAL
+3.3V_TU
L500
PZ1608U121-2R0TF
C507 C508
C510
C509
0.1uF 22uF
0.1uF
22uF
16V 6.3V
16V
6.3V
IF_AGC_MAIN
+3.3V_TU
R503
R502
1.8K
1.8K
TU_SCL
TU_SDA
OPT
OPT
C505 C506
20pF 20pF
50V 50V
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
140822
5 5
LGE Internal Use Only