LG K2171TA Service Manual

OPT601
38KHz

C645

0.01

N602

24C02

1

VDD

2
3

SCL

4 5

SDA

GND

XP802

1
2
3
4
5

VD616

5.6V

L601

100uH

C633

100u/10

C653
30P

C628
30P

L602

27uH

C629
30P

R621

4.7K

VD330

1N4148

VD331

C625

1N4148

100P

5V

C621
22u/10

VD608

1N4148

R651

R652

1.2K

5.6K

C630

2.2U

AC

F901

T2A/250V

21

Notes:

(1) All capacitors are in " F" unit unless specially noted.
(2) All resistors's power except for specially noted is watt
and with the unit of Ohm.
(3) All resistors are carbon resistor except for signed as noted.
(4) The values of voltage signed on the circuit are measured
with muti-meter refering to the ground on the circuit.
(5) All waveforms are measured as Colour Pattern.
Signals are received while all controllable values are half of
their maximum.
(6) This circiut diagram is subject to change without prior noted.
(7) The components with symbol are very important as for
safety and can only be exchanged for the specificated ones
by manufacturer.

R644

1K

8
7

WP

6

N601

R629

100

R630

100

CKP1002S

42

SYS1

41

SYS2

40

SDA

39

SCL

38

IDENT

R668

BLUE

37

10K

36

RMOT

C632

0.01
C/E

35
34

VDD

33

RES

Z601

6.0MHz

32

XTAL1

C654

31

XTAL2

30P

30

TEST

29

DOSC1

28

DOSC2

27

VSYNC
HSYNC

26

FBL

25

RED

24

GREEN

23

BLUE

22

R634

C634

5K6

100P

R635 5K6

R636 5K6

R637 390

C637

R330

100P

10K
R331 10K

C624
100P

V606 C1815

V607
A1015

C901

0.1/250VAC

XS901
TJC1-2

R654

10/1W
C622

10u/25

R653

2K

R650

VD607

2K

5.6V

L901 L902

S901

SWITCH

R627

R628

3.3K

3.3K

R643

10K

R642

10K

CC601

100PX6

1

1

2

TDAC

2

VOL

3

3

COL

4

4

BRI

5

5

CON

6

6

HUE

7

7

7

BAND0

8

BAND1

9

KEY

10
11

AFC

KEY1

12

VSS

13

LED

14

SCART

15

AFT.SW

16

POWER

17

AV2

18

AV1

19

SE/PAL

20

R647

22/1W

21

C635
100P

R669

R631

2SC1815

39K

PQ05RD11

10K

R655

1K/1W

V603

1N4148

XP901
AC250

50/60

C636
100P

C903
470

400VAC 400VAC

AC

C902

0. 1/ 25 0V

u

V602

A1015

1
2
3
4
5
6

R640

22K

10K

R639

VD603

1N4148

VD601

1N4148

VD602

1N4148

VD613

1N4148

1 2 3 4 1

N606

VD606

VD605

C904

470

RT901

30/T

RR601
15KX5

8.2V

R645

1K

A1015

R664

2SC1815

2SC2655

VD604

V601

R607 1K

VD612

1N4148

R638

2K

V302

V605

C641

.01

R612 3K

R606

R605
150K

R603
150K

R601
150K

15K

R641 22K

3.3K

68/1W

VD609

1N4148

22K

R608

R602

R352

3.3K

R356
1K

C601

47/16

R648

21

30K

R604

56K

IDENT

C351
.001

7
6
5
4
3
2

R671

R649

1.5K

C608
10/16

4700P/
250VAC

4700P/
250VAC

XS902
TJC1-2

DEGAUSS

XP902

R615

R619

10K

R616

XP801

1K

C905

C907

180K

21

470U/16

56K

R666

R657

R658

R659

R660

1

R203

N201

TDA1013B

GNDOUTVccoutVOLGnd

123456789

C203

C208

0.01

1000u/25

C301
3n3

C302

3.2V

30P

1

5.9V

2

5.9V

3
4
5

4.3V

6
7

746

1.7V

8

9
10
11

3.4V

12
13

2.2V

14

3.8V

15
16

3.2V

17
18
19
20
21

2.6V

22

2.6V

23

2.6V

24
25

0/6/8V

1.3V

4V

8V

4.3V

O/8/4V

2.4V

2.4V

2.4V
O.3V

2.2V

L301

0.15uH

R301

1K

R302

6.8K

C336

.1

C324

1000P

1

R306

1K
C306

0.1(M)
C326

10u/10

R337

C307

0.01

C308

0.1(M)

220u/10

C309
C312

1u/50

10u/10

R308

10K

C310

R307
10K

C610

2.2u/10

R322 1K
R321 1K
R320 1K

C322

0.1(M)
C321

0.1(M)
C320

0.1(M)

C604
10u/10

R8 09

75

C606
10u/10

1000P

22n

N301

VD102
MA858

C126

0.01

SERVICE

R343

5.6K

C316
1000P

VD308

5.1V

C214
1U

C213

.015U

R109

5.6K
R108

1V

C102
18P

R110

220

470

T104

R304 1K
R303 1K

220/0.5

R215
100K

R213
10K

105

RP401

R313

R212

1k

VD201
12V

C209

6.8n(M)

R117

12K

R115
33K

L102

1uH

7.8V
C106

0.01

V103

Z101

C388A

F1026S

27

R111

R103

10K

R101

4.7K

+8V

10K

R421

+12V

R113

1K

R207

15K

27K

10 K

RP 10 1

C108

0.01

4

in IN LF

2.2u/10
C204

C201

1U/16

R208

18K

C113

22n

C114

2.2u/10
C112

4.7u/10
C109

0.1(M)

0.01

C110

2.2u/10
L103 027

C107

R112

0.01

820

V.OUT

C325 0.1(M)

C431 4n7(M)

C116 4n7(M)

R123
15K

1u/10

R124

C119

820K

4n7(M)

Z311

C120

443

18P

Z312

18P

C121

358

C123 4.7n

C122

0.1(M)

C313

0.1(M)
C314

0.1(M)

10u/10

C602

C206

0.1(M)

R201

12K

L104 12uH

7.0V

52

3.4V

51
50

1.1V

49

3.9V

48

C111

6.5V

(T)

47

4.2V

46

4.2V

45

4.5V

44

O.9V

43

2.8V

42

2.8V

41

4.0V

40

2.5V

C118

39

1.2V

38

O.4V

37

8.2V

36

3.2V

35

3.2V

34

5.4V

33

1.5V

32

R120
100K

1.5V

31

1.5V

30

4.3V

29

4.3V

28

Hue

0.9V 1.1V

27 26

R

G

B

FBI

COL

CON

BRI

R202
15K

N101

TDA8362

BG
DEC

DEC

SOUND4.0V

OUT
AGC

Adj

SIF_IN

AGC
RF

Aud In

AGC

IF.IN

AFT Gnd

V

Out
V.Saw

Tooth
V.FB

Ph1

Vid in
Ph2
Sand

Castle

H.

Ext/In

Out

H.

POWER
443MHz
358MHz

Burst
Phase

SECAM
Subc

B-Y
Out

R-Y
Out

R-Y

InRIn

B-Y

In

Hue
SECAM
Out

CVBS

Ident

Sharp

R204

220K

C207
1u/16

DE­EMP

Ref
Coil

VOL

Ext

Vid

Vid
Out

Out
DIG

ACC

Vcc
Gnd

CAL
DEC

Int

Vid

In

C.IN

BRT

B.

Out

G.

Out

R.

Out

Inst

In

G

In

B

Cont

Col

XS204

C219

C220

R610

22K

R617

150K

R618

150K

R656

3.3K

MENU

100

VOL-SYSTEM

1K

VOL.+

1K

PROG-

2.7K
PROG+

6.8K

V304
A1015

R354
33K

R355
680K

Gnd VOLoutVccOUT GND

R222

2.2
.1

R353
680

R670

9 8 7 6 5 4 3 2 1

R221

220K

C218

R625 33K

C623

VD615

47/50

1N4148

R623

R624

15K

33K

C614

0.1

V608

C613

BXS20

VCC ABQ1 Q2 Q3Q4

N603
M54573L

0.47

C619

C350

0.1

12345678

UVL VH

R125
10K

2SC1815

V609

R633

47K

C332
47u/10

C331

0.1(M)

1u/50

RP601

200KB

C612
100P

1K

1U

2SC1815

1.5V

(1.5V)

(5V)
C333

C328

0.1(M)

LF IN in

C217

0.1(M)

VD106
33V

15K

R220

10u/16

V105

R127

N302
TDA8395

Fref

IDENT

1

16

CVBS

TEST

2

SAND

0.01

15

3

Vp

14

8V

4

13

5

12

6

GND

11

CLOCHE

7

10

1.5V

ref

-(B-Y)

4V
PLL

1.5V

98

ref

-(R-Y)

4V

C215

3300p

C216

R219

10U

12K

1N4148

R626
15k

BU

8

BT

7

BH

6

AGC

AGC

5

BL AFT

4
3

C618

2

BM

1

R104

10K

100K

0.1(M)

33V

R342
27K

C222
1u

C327

10u/16

100K
R325

VD304
1N4148VD303

C616
10u/16

C615

0.1u/35
C617

10u/16

R119

4.7K

C125

10u/16

L107

IF

12uH

L101

1uH

R118

5.6K

C117

R121

3.3M

C323

0.01

1

Vcc
5V

2
3

GND

4

GND
SAND

5

CAST

1.2V

6
7

150P

C319

8 9

R214
330K

1k
V210

C1815

1K

R218

R336

6.8K

+8V

C115
10u/16

R116

12K

C124
220u/16

C105

0.01

C104

T103

0.01

370

R107

1K
R106
75

C101
30P

R102

10K

C103

0.01

NOR.

S301

C329

1000P

C330

1000P

16

R-Y

IN

1.8V

15

C315

B-Y

14

IN

1.8V
13

TDA4665

B-Y

12

OUT

3.3V

R-Y

11

OUT

3.3V

GND

10

C318

VccGND

5V

C317

47u/10

R216

2.2k

R217

33V

C917

R921

2n2/400VAC

8.2M/1W

C909

100/400V

R916

R918

680K

3 2

N901

TDA4605

1 8

R914
220

270K

C918

2n2

V901

2SK1794

R903
47

5

R902

4K7

6

C913

47/50

R919
10K

R913

2K2

C919

R907 1K

.47U/16

2

R901

4.7/10W
C908

4700P/
250VAC

VC901

S60
C906

4700P/
250VAC

R915
15K/2W

6

R920
12K

7

C916
560n

4

R917
15K/2W

2.0VP-P 1.7VP-P 1.7VP-P

T901

80-F02

11

R906
68/3W

C915
1/63

N902
PH817

4

6

1

R925

0.68/1(F)

8

0.68/1(F)

3

14

5

13

2

0.68/1(F)

V902

A1015

1

4

2

3

2.5VP-P

R905

15K/3W

R904

C911

15K/3W

33n/630V

VD901

L903

RU2

C910

9

220P

C912
2n2

VD902

S5295G

C914

VD903

3.9n

S5295G

3 4 5 7

VD904

L904

1KV

VD905

R922

S5295G

C925

470/500V

470/500V

R924

VD914

6.2V
VD915

1N4148

L905

RG2

60uH

110V

C923

100u/160

C924

470/500V

VD907

RU2

C928

C930

470/500

1000U/25

C926
2200U/25

C927

VD906RU2

R930

22K

R934

1K

V904

A1015

5.0VP-P 25VP-P 44VP-P 0.8VP-P

R422

10K/0.5

18V

16V

R933

1K

24V

R931

68K

1K5
RP901

R932

3.9K

61

V404

2SA1015

100u/16

10

40V

C929

1000u/25

5

C415

V401
C2482

R427

18K

V405
2SC1815

R428

20K

R409

10K

C414
2200P

220/500V

500V

C427

100u/16

VD412

18V

VD411

8.2V

R408

3.3K/5

C410
33U/160V

8 9

C202

3.3

0.1(M)

Z304

6.5MHz

Z303

5.5MHz

Z302

4.5MHz

Z301

6.0MHz
C303

100P

L305 10uH

8V

4V

V301

3.3V
R338

180

47

R324

10K

3

75

R8 08

75

R8 11

R613

VD611

15K

1N4148

R614
15K

10u/16
C423

R425
330K

R426

56K

C411
22OP VD403

R424

18K

C412

10u/50

R423

12KC428

T401

R0710

11

N303

TC4052

2SC1815

V309

1N4148

C413
2200P

C304
1000P

A1015

VD610

V402

2SD1555

470u/25

1
2
3
4
5
6
7

R339
390

R340
120

R341
120

1K

R310

C804

1u/16

R433

5.1K

S5295G

C418

100u/16V

500VP-P

C205

R311

0Y
2Y

COM2

3Y

INH
VEE
VEE

10K

VDD

R312

10K

15162X
14

1X

COM1

13
12

0X3X1Y

11

SYS1

10

SYS2

98

L303

6.8uH

Z306

4.5MHz

6.8uH
L302

L304

Z308

VD407

L401

V306
A1015

5.1V

C1815

1n4148

VD312

6.0MHz

V308

C417

0.01

4n7/1K6

Z305

VD406

C402

C311

1u/50

R318 220

R319

220/0.5

2.9V

R317 220/0.5

2.9V

2.9V

V305

A1015

R332

1K

VD614
1N4148

VD404

1N4

1N4148

6.8uH

Z307

R316

R314 220

R350

10K

8V

N403
7808

12

C401

4n7/1K6

220

R315

220/0.5

10K/0.5

3 2 1

6.5MHz

A1015

V307

76VP-P 23.5VP-P 850VP-P 5.4VP-P

XS201
TJC3-2

1

2

9

10

1

2

XS202

TJC3-2

XS301

TJC3-6

13

R

15

G
B

14

8V

12V

5.5MHz

R

1

B

G

2

C

B

3

D

4

F

VD504

5
6

R309

1K

1N4148

M
E

8V

V503

A1013

R522

1.5K

VD501

1N4148

100U/16

N801 TEA2014

1
2

1u/50

3

C305

2.2u/16

4 5

R326

4.7K

8V

R432

12V

4
3
2

C137

.01

1

C403
820P
2kV

C409

1000u/25

C801

R351
1K

C806 1u/50

6

R410

8

3.3K

R411

51K

VD408

1N4148

R434

4K7/1W

C416

1000u/16V

N402
78R12 T402

VD402 RU2

C408

470/500

R407

150K/0.5

24V

13V 0.8V 0.7V 24V 1.5V

7

C426

2n2(M)

3.3u/50
C419

R412

12K

0.68/1(F)

110V

1110

12

C512

GND

TV

OUT
INT

R413 8.2K

(T)
R414

820

RP402

100

22K/0.5

R405

R404

1/2W(F)

XS501
CRT SOCKET

130V

2.9V

V504
C2068

VD503

VD502

1N4148

1N4148

R512 330

R510

2.7K

C505
1200P

C506
150P

RP503

10K

L802

2.2uH

C805
1u/50

8

EXT

7

VDD

C803

100u/16

OUT

6

R802

330

CON

R803
10K

0V

(8V)

7654321

(M)

C425

1000P

220u/35

C424

330/500

2200u/35

C421

1000u/35V

R415

2.2/1

TP402TP401

C407

R406

33n/200V

R401

2.2/1(F)

5
6
4
8
1
2

3

13

8 6 5

R513

R514

2.7K/0. 5

130V

2.9V

V502
C2068

R505 330

R506

2.7K

RP504

B-300

RP501
10K

2

V303
2sc1815

L801

2.2uH

R812

1k

R801

75

N401
LA7830

C430

0.01

C420

VD405
5295G

C429

470/500

VD401
S5295G

L402 51uH

C405

N1603

FOCUS

SCREEN

7

5.5VP-P 5.6VP-P

14 15

2.7K/0. 5

C503

150P

R402

1K/1W

C404

0.47/200

R516

C502
1200P

R804
75

VE01

CRT

R
G

B

1711

R517

2.7K/0. 5

R521

R515

12K/2

R509
12K/2

130V

2.9V

R518
330

150

C507
1200P

R519

RP502

B-300

RP505
10K

R805
10k

R807

1k

R813

1k

R814

1k

12K/2

200V

V505

C2068

10u/250V

C501

C509

150P

2.7K

C510

4n7/AC400

H

KI

Focus

SCREEN

R806

1k

1

H.V.

SCART

21

R430
1K

24V

V

4

C422

82n

R416

(M)

470/1W

3

DY

2

1

H

J

C406

10u/250V

K

XS402

TJC2-3

I

R403

470/1W