32LS3800 (CHASSIS:LB21C, LB21F) - LG TV Service Manual (repair manual). Page 31

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.

C3737
100pF
50V

C3743
20pF
50V

OPT

C3739
10uF
6.3V

OPT

C3711
18pF
50V

R3732
100

R3733

100K

C3708

0.1uF
16V

C3715
22uF
10V

IF_AGC_MAIN

+3.3V_TU

IF_N_MSTAR

C3727

0.1uF

16V

C3705

100uF
16V

OPT

+3.3V_TU

R3760

0

+3.3V_TU

+1.8V_TU

C3741
10uF
10V

C3716

0.1uF

16V

C3717

0.1uF

16V

C3710

0.1uF

16V

TUNER_RESET

TU_SDA

C3740

0.1uF

16V

C3707
100pF
50V

+3.3V_Normal

+3.3V_TU

R3761

0

+3.3V_TU

C3713
18pF
50V

+1.8V_TU

IF_P_MSTAR

C3725

0.1uF
16V

TU_SCL

C3738
0.1uF
16V

C3723
22uF
10V

C3742
20pF
50V

OPT

R3766
1

R3785

0

R3782
2K

R3786

0

L3703

CIS21J121

R3710

200

1%

OPT

R3704

100

R3735

33

R3736

33

R3711

0

5%

IC3703

AP1117E18G-13 

2

OUT

3

IN

1

ADJ/GND

C3750
5pF
50V
OPT

C3751
5pF
50V

OPT

C3702

0

R3741

1K

R3740

1K

R3780

510

R3781

510

TU3700

TDSS-G201D

5

+B1[3.3V]

11

DIF[N]

2

RESET

10

DIF[P]

4

SDA

1

NC_1

9

IF_AGC

8

NC_3

3

SCL

7

+B2[1.8V]

6

NC_2

12

SHIELD

A1

A1

B1

B1

TUNER_NON_EU

GP4L_S7LR2

2011.10.11

14

should be guarded by ground

close to the tuner pin, add,09029

60mA

close to TUNER

Close to the tuner

Add,0929

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

Size change,0929

GLOBAL tuner block except EU and China

Vo=VREF*(1+R2/R1)

VREF = 1.25V

R1

R2