55LEX8-SA (CHASSIS:LJ03S) - LG TV Service Manual (repair manual). Page 26

THERMAL

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.

IF_AGC

L2900

BLM18PG121SN1D

ISDB_POWER

R2900

0

ISDB_DEMOD

R2901

0

INT_DEMOD

IF_AGC_ISDB

+3.3V_DE

TP2901

C2900

0.1uF

ISDB_POWER

IF_AGC_SEL

TU_IF_AGC_BCM

C2901

0.1uF

ISDB_POWER

+3.3V_NORMAL

R2904
10K

ISDB_POWER_BCD

C2904

0.1uF

16V

ISDB_POWER

+5V_NORMAL

L2901

ISDB_POWER_BCD

C2903
10uF
10V

ISDB_POWER

R2905
10K

ISDB_POWER_SEMTECH

C2907
0.1uF

OPT

R2903-*1
10K

ISDB_POWER_BCD

C2902

0.1uF

16V

ISDB_POWER

+3.3V_DE

R2903

5.1K

ISDB_POWER_SEMTECH

R2906
10K

ISDB_POWER_BCD

C2905
22uF
16V

ISDB_POWER

IC2900-*1

SC4215ISTRT

ISDB_POWER_SEMTECH

3

VIN

2

EN

4

NC_2

1

NC_1

5

NC_3

6

VO

7

ADJ

8

GND

+1.2V_DE

C2906
0.1uF

OPT

R2902

10K

ISDB_POWER

IC2900

AP2132MP-2.5TRG1

ISDB_POWER_BCD

3

VIN

2

EN

4

VCTRL

1

PG

5

NC

6

VOUT

7

ADJ

8

GND

9

[EP]

Demodulator

GP2_Saturn7M

Ver. 1.0

29

IF AGC SELECTION

Panasonic Demodulator Power(3.3V,1.2V)