LG 42LB550T Service Manual

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.
+3.3V_TU
C1613
20pF
50V
OPT
C1602
22uF
6.3V
C1616
0.1uF
16V
C1605
22uF
6.3V
IF_N_MSTAR
IF_AGC_SEL
TU_SIF
FE_TS_VAL_ERR
+3.3V_TU
C1610
18pF
50V
C1601
0.1uF 16V
OPT
C1615
100pF
50V
R1607 33
C1603
0.1uF
16V
TU_SDA
R1611
1.8K
TU_IIC_ATSC_1.8K
R1612
82
OPT
FE_TS_DATA[0]
R1610-*1
1K
TU_IIC_NON_ATSC_1K
IF_P_MSTAR
L1600
UBW2012-121F
R1609 100
C1609
18pF
50V
IF_AGC_MAIN
R1606 0
IF_NON_FILTER_KR
C1611
0.1uF
16V
TU_CVBS
R1606-*1
10
IF_FILTER_AJ
R1605-*1
10
IF_FILTER_AJ
TUNER_RESET
+3.3V_TU
R1605 0
IF_NON_FILTER_KR
C1614
20pF
50V
OPT
TU_SCL
TU_GND_A
R1608 33
RF_SWITCH_CTL
C1607
0.1uF
16V
FE_TS_SYNC
R1613
0
OPT
R1611-*1
1K
TU_IIC_NON_ATSC_1K
+3.3V_Normal
FE_TS_CLK
R1610
1.8K
TU_IIC_ATSC_1.8K
TDJH-G101D
TU1601-*1
TU_AJ_T/C
47
SHIELD
6
IF[P]
7
IF[N]
8
NC_2
9
NC_3
1
B1[+3.3V]
2
NC_1
3
IF_AGC
4
SCL
5
SDA
A1
A1
B1
B1
TDJH-H101F
TU1601
TU_ATSC
47
SHIELD
6
IF[P]
7
IF[N]
8
NC_2
9
NC_3
1
B1[+3.3V]
2
NC_1
3
IF_AGC
4
SCL
5
SDA
A1
A1
B1
B1
Size change,0929
16
should be guarded by ground
Close to the tuner
FE_AGC_SPEED_CTL
close to the tuner pin, add,09029
CHANGE TO
6.3V 2012 X5R
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
L14_M1A
CHANGE TO
6.3V 2012 X5R
GLOBAL tuner block KR & AJ
GND seperation for ASIS tuner
close to TUNER
TUNER_KR_AJ
2013/06/05
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

LG 42LB550T Specifications

General

Brand	LG
Model	42LB550T
Category	LED TV
Language	English