LG Electronics 42LT640H-ZA service manual P4RGLOBALTUNERBLOCK, SI2176ATSC1INPUTH, SI2156DVB1INPUTH

P4R_GLOBAL_TUNER_BLOCK

+3.3V_TU

R1402

R1403

100K

100

TUNER_RESET

+3.3V_TU

C1404

0 . 1 u F

16V

R1407

R1408

1K

1K

TU1400

R1405

33

TDSS-G101D

TU_SCL

SI2176_DVB_1INPUT_H

R1406

33

TU_SDA

C1401

OPT

OPT

18pF

C1405

C1411

C1412

20pF

20pF

50V

18pF

50V

50V

50V

+3.3V_TU

NC

1

RESET

OPT

2

C1402

C1407

C1409

+3.3V_TU

SCL

10uF

100pF

0 . 1 u F

6.3V

50V

16V

3

SDA

NON_ASIA_TU

R1413

4

c l o s e t o t h e t u n e r p i n

OPT

470

NON_ASIA_TU

+3.3V

R1410

R1415

5

close to TUNER

0

82

TU_SIF

NON_ASIA_TU

SIF

NON_ASIA_TU

E

R1426

6

C1400

0

+1.8V

0 . 1 u F

16V

NON_ASIA_TU

B

NON_ASIA_TU

C1420

R1409

Q1400

7

4.7K

C MMBT3906(NXP)

C1400-*1

10pF

50V

CVBS

0

ASIA_TU

ASIA_TU

8

IF_AGC

+1.2V/+1.8V_TU

ASIA_TU

+3.3V_TU

R1421

9

390

DIF[P]

10

C1406

C1408

C1410

100pF

0 . 1 u F

100uF

R1416

R1417

DIF[N]

50V

16V

16V

NON_ASIA_TU

220

220

NON_ASIA_TU

NON_ASIA_TU

11

R1427

OPT

0

R1411

0

TU_CVBS

12

R1404

NON_ASIA_TU

E

100

IF_AGC_MAIN

C1421

R1424

R1412

0

NON_ASIA_TU

C1403

10pF

ASIA_TU

390

B

50V

ASIA_TU

R1414

Q1401

0 . 1 u F

s h o u l d b e g u a r d e d b y g r o u n d

ASIA_TU

R1423

1K

MMBT3906(NXP)

SHIELD

2K

C

16V

OPT

R1422

R1425

0

0

R1400

ASIA_TU

ASIA_TU

0

IF_P_MSTAR

R1401

0

IF_N_MSTAR

C l o s e t o t h e t u n e r

1 . s h o u l d b e g u a r d e d	b y g r o u n d
2 . N o v i a o n b o t h o f t h e m
3 . S i g n a l W i d t h > =	1 2 m i l s

S i g n a l t o S i g n a l W i d t h = 1 2 m i l s

Ground Width >= 24mils

TUNER MULTI-OPTION

	+3.3V_TU			+3.3V_Normal
			L1400
			CIS21J121
60mA
		C1414	C1415	C1418	C1419
		22uF	0 . 1 u F	22uF	0 . 1 u F
		10V	16V	10V	16V

+3.3V_TU					+1.2V/+1.8V_TU
			IC1400
	AZ1117BH-1.8TRE1
	IN				OUT
		3	2
C1413			1				R1419		R1420
0 . 1 u F				ADJ/GND		1
16V							1/10W	150
						C1416		C1417	OPT
						0 . 1 u F		10uF
						16V		10V

SI2176_ATSC_1INPUT_H

TU1400-*1 TDSS-H101F

NC

1

RESET

2

SCL

3

SDA

4

+B1[3.3V]

5

SIF

6

+B2[1.8V]

7

CVBS

8

IF_AGC

9

DIF[P]

10

DIF[N]

11

12

SHIELD

SI2156_DVB_1INPUT_H

TU1400-*2 TDSS-G201D

NC_1

1

RESET

2

SCL

3

SDA

4

+B1[3.3V]

5

NC_2

6

+B2[1.8V]

7

NC_3

8

IF_AGC

9

DIF[P]

10

DIF[N]

11

12

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.

EMEA INTERACTIVE

GP4_MSTAR	2011 . 08 . 21
TUNER	1 4	2 0

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