XOCECO LET3250, Service Manual

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Title

Number

Revision

Size

A1

Date:

13-Jan-2005

Sheet    of 

File:

E:\PROTEL\LHL.Ddb

Drawn By:

2

1

N503

7805

2

1

3

4

VD501

VD501

1

VD504

FR103

1

2

3

4

5

6

7

8 VCC

TEST

SCL

SDA

GND

A2

A1

A0

N202

24C08

FU501

T4A 250V~

XS502

XS502

3

1

2

XS203

*

2

4

1

3

XS302

*

V501

1015

 

3

4

1

2

L501

 

1

 

2

 

3

 

4

N502

*

AGC

BM

SCL

SDA

BM

BM

IF1

1

3

4

5

6

7

11

9

VT

T101

*

1

3

5

6

XS301

*

G201

*

3

2

1

5

4

Z201

*

C501

0.1

VD503

HZ5B1

C509

47u 50V

R501

2.2M

G202

*

C502

0.1

R502

R502

C505

4n7

R510

3K9

C506

4n7

1

2

R503

1/2W 110K

C504

4n7

C503

4n7

1

2

3

4

5

N501

FSCQ1265RT

C508

1000 1KV

R505

330

C512

0.047

C510

0.022

C507

150uF 400V

R507

10

C511

3300

C514

1n 1KV

1

VD505

IN4148

R506

680

1

VD502

IN4148

1

2

R504

1/2W 110K

1

VD509

TBY56J

R511

4K7 1/4W

R513

200K 1/4W

R512

2K

C517

100u 160V

C521

470u 16V

VD511

HZ7A2

C515

680

1

VD507

FR103

R522

3K9

R521

10K

R214

4K7

R205

2K2

R215

4K7

R220

4K7

R207

390K

C214

0.47

L201

15uH

C204

1u

C211

22u 16V

C202

0.022

R201

39K

C203

39pF

C205

0.022

C201

10pF

R204

10K

C207

0.01

C208

1500

R206

10K

C216

0.015

C212

10V 100u

R208

51

C218

10V 100u

R213

1/

4W

 5K

1

C217

1u

R211

220

R212

3K

R216

4K7

R234

1K

R217

4K7

R218

100

R219

100

R222

390K

R228

100

R305

*

R107

150

R225

47K

R240

560

R230

24K

R237

47K

R238

47K

R227

20K

R229

24K

R224

100

R221

10k

R223

1M

R233

680K

C227

1u

C221

15p

C222

0.033

C220

15p

C223

50V 2.2

C224

0.01

C237

0.

01

C225

10V 100u

C229

18p

C231

0.047

C226

47pF

C235

0.

47

C232

0.

01

C304

5n6 400V

C233

10V

 470u

R109

27

R108

560

C238

50V

 2.

2u

C107

0.01

C236

0.47

R105

5K6

R106

1K2

C106

0.01

C105

100u

C108

0.01

C101

4u7 50V

V101

C2717

C102

0.22

R104

100

R103

100

N101

upc574

2W

R116

12K 2W

C112

4u7 50V

INV I

N

1

VC

C

2

PU

MP

3

GND

4

OUT

P

UT

5

OUT

 VC

C

6

NON I

N

7

N301

LA78041

C331

10p

R321

1 1/2W

C327

10u 16V

C335

35V 100u

C332

100U 35V

R320

22K

R319

22K

1

2

R317

330 1/2W

R325

10K

R327

12K

R330

5K6

C333

1000

C326

100n

C328

0.1

1

VD308

IN4002

VD309

HZ5B3

R318

1K5

R326

330

R328

33K

C330

4u7 25V

C329

2200u 25V

1W

R324

0.68 1W

10

 

V301

2SC2383

C312

(1500)

C311

8n2

C310

8n2

C306

390p

C305

820

C308

2n2

C307

160V 4u7

R302

2K7

R303

33

3

4

1

2

T302

XR0961

V302

C2539

1

VD305

FR103

1

VD304

FR103

1

VD301

S5295J

C302

220p

R304

10 1W

R307

1W 3.6

R306

1W 2.4

C318

680p

C315

680p

C322

470u 16V

C321

1000u 16V

140V

200V

27V

C303

33u 250V

27V

12V

C317

1000u 35V

R308

1 1/2W

L301

L2

C319

470u 16V

C320

10n

C316

10n

TP9

9V

6

TP6

7

 

1

2

R314

1/2W 56

C301

33u 250V

R509

8M2

C523

2n2 400V~

R508

1K

2

4

1

3

XS202

*

R101

100K

R235

560

R239

680

R236

10K

C206

0.022

5V-2

V203

A1015

C239

50V 1u

9V

4

4

8

8

9

9

10

10

2

2

1

1

3

3

7

6

5

XS602

5

4

7

6

L

V

11

10

14

14

13

13

9

8

Cb

Y

Cr

12

12

19

18

17

16

21

20

L

R

V

15

3

2

R

1

IN

OUT

XS601

L601

56uH

R601

82

C601

0.01uF

R604

4.7K

R606

4.7K

C228

0.1

C230

0.1

R603

75

R602

75

R607

1K

R608

1K

V202

A1015

R231

560

R610

75

9V

R232

100

C234

10V4700u

R312

4K3

VD307

HZ7C2

R311

8K2

R309

10

1

VD306

S5295G

R313

4K7

C324

10u 50V

V303

C1815Y

C325

100u 16V

C323

680p

TP1

TP2

C209

100u

C210

0.01

5V-2

1W

R301

9K1 2W

1

VD313

S5295G

C338

250V 4u7

L302

 

L303

 

1W

R315

1W 1K

1W

R316

1W 1K

C339

400V 0.39

C519

1000u 25V

C513

680

1

VD508

FR103

C518

103p

1W

R520

15 1W

C520

330u/16V

5V-2

5V-1

C522

*

V507

C1815

5V-1

A_

OUT

SDA1

S

DA1

SC
L

1

SC

L

1

3

2

9

6

7

13

15

17

19
18

20

8

*

*

*

*

*

*

T501

SD4929A

R514

10K

C240

0.01

L101

56uH

R110

100

4

3

5

2

1

6

XS201

 

R210

4K7

C215

0.47u

VD201

HZ5C2

R343

68K

R344

68K

1

2

3

t

RT501

PTC

3W

R332

3K3 3W

POWER

X-RAY

FBP

R

G

B

B

G

R

C241

0.01

ABL

10

9

4

7

6

1

3

2

HV

FOCUS

SCREEN

T301

*

1

2

XS501

C242

50V 1u

C243

50V

 1u

R611

75

C524

470pF 250V~

C525

470pF 250V~

L102

68uH

L202

22uH

C113

0.01

C611

10u 16V

C526

0.1

R241

15K

C244

0.01

R242

68K

TP1

TP1

TP2

TP2

V506

C1815

R524

5K6

R523

10K

OFF ON

C605

16V 10u

C608

10u 16V

R612

100K

R614

15K

R613

6K8

R525

220

V505

C1815

R526

5K6

R516

5K6

R515

5K6

R243

10K

R527

100K

C527

10n

R528

5K6

S-D

E

T

S-D

E

T

KEY

KEY

S-C

VI

N

AV1/

AV2(

A

)

RE

M

RE

M

9v

DVD

DVD

R244

1K8

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

N601

TC4053

TV

O

R620

75

R245

10K

L203

68uH

L204

68uH

C245

0.1

3

1

2

N504

TL431

R706

10K

R707

560K

R708

1K

R709

10K

V701

A1015

R703

10K

1

VD703

IN4148

1

VD704

IN4148

C708

16V 220u

R246

180K

R247

2M2

VD202

5C1

VD203

5C1

VD204

HZ5C1

VI
N

TVO

S-C

C609

0.01

 

 

 

*

*

 

 

 

 

*

 

AN7522

GND

11

VC

C

1

OUT

1

(+

)

2

GND

3

OUT

1

(-

)

4

ST

B

5

GND

7

IN

2

8

VOL

9

OUT

2

(-

)

10

IN

1

6

OUT

2

(+

)

12

N701

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

60

61

62

63

64

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

A OUT

SI

F I

N

F

M

/A OUT

SI

F A

PC

 FI

L

SI

F O

U

T

PI

F A

G

C

RF

 AGC

PI

F I

N

 1

PI

F I

N

 2

IF

 GND

IF

 VC

C

FM FI

L

ABL

AKB

V RAM

P

OS

C

P00  X

-R

A

Y

RGB VCC

4.

43M

R OUT

G OUT

B OUT

V OUT

GND

CCD VCC

VCO IRE

F

FB

P I

N

H OUT

H AF

C

H VCC

A IN

PO

1/

IN

T

1

S-

D

E

T

 P

O2

  DVD-DE

T

PO

3/

IN

T

3

P

1

4

  AV1

/AV2

REM

AV1

/AV2

PO

WE

R

 K

E

Y

28

29

30

31

32

55

56

57

58

59

P15  PO

W

P17

VOL

P16 PWM3

IC

 BUS

 CON

P12/

SD

A

1

P13/

SC

K

1

CR

CP

U GND

PL

L

RES

E

T

P

O5

/AN5

P

O4

/AN4

VDD

XT

2

XT

1

KE

Y

TV

/A

V

P

O7

/AN7

P

O6

/AN6

CB

F B

 I

N

R I

N

G IN

B I

N

V OUT

/F

S

C

C AP

C

V IN/Y IN

AP

C F

IL

V/C/D VCC

V IN/S

-C

 IN

B L D F

IL

AF

T

 F

IL

V OUT

LA76932

N201

LA76932

*

GND

1

Rc

h

-i

n

2

R-

D

C1

3

ST

-1

4

L

PFC

5

R-

T

C1

6

R-

BC

7

R-

BC

8

R_

D

C2

9

R

-VR

OUT

10

VR

E

F

11

VC

C

12

DAT

A

13

CL

K

14

L

-VR

OUT

15

L-D

C

2

16

L-B

C

17

L-B

C

18

L-TC

1

19

L-TC

1

20

H

PFC

21

ST

-2

22

Lc

h

-in

23

DE

T

 OUT

24

LV1115

N703

*

C701

1u /25V

GND

C702

4.7u/50V

C703

5600pF

C704

2700pF

C705

0.1u

C706

0.1u

C728

0.1u

C709

4.7uf

C720

4.7u

C710

1000u/35V

C711

4.7uF

C712

0.1uF

C713

0.1uF

C714

2700p

C715

0.1uF

C716

0.068

C717

4.7uF

R701

1M

C718

1uF

TC4052

2Y

2

2

2Y

0

1

2Z

3

2Y

3

4

2Y

1

5

E

6

VE

E

7

GND

8

S1

9

S0

10

1Y

3

11

1Y

0

12

1Z

13

1Y

1

14

1Y

2

15

VC

C

16

N702

R730

10K

R731

10K

C721

2200u/16V

C722

1u/16V

C723

1u/16V

C732

10u/16V

R733

100K

R737

100K

C719

1uF/16V

R743

100K

R744

100K

2

4

1

3

X728

GND

C741

100p

V704

C1815

V703

C1815

R750

1K

R751

1k

C610

100u/16V

1

VD317

ERD07-15

1

VD318

ERC20M-04

C350

22n/400V

L307

LH133

C340

10u/160V

V306

C5248

V304

A562

1W

R345

1

1

VD315

1N4148

R346

3.3K

R347

2.7K

V305

C1815

R350

1K

R348

3K

R351

1K

R710

1K

C613

10u/16V

C612

10u/16V

L+

R-

R+

L-

R349

100

C314

100u/16V

VD302

5V2

R352

*

AV/

T

V

AV1

/A

V2
(A)

AV/

TV

AV1/

AV2

1

VD702

1N4148

SC
L

1

S

DA1

4

3

5

2

1

6

XS604

PIN6

G V G R L

C604

10u/16v

C606

10u/16A

9V

5V-2

R712

220

R711

220

9V

V503

C1815

GND

3

2

1

5

4

RL01

NPN2

R518

10K

C528

10u/16V

R517

10K

12V

C733

10u/16V

R713

10K

R

714

10K

9V

C742

100p

C743

100p

C744

100p

2

1

N201

7809

R715

10K

R716

10K

C734

10n

C735

10n

R717

3k

C736

10uf/16V

C530

330u/16V

R616

4.7K

R615

4.7K

R322

1.5K

VD303

18V

C309

100u/16V

R329

10K

A_Lout

C531

10uf/50V

C246

15n

C602

1u/16V

R617

100k

R618

100k

C

247

0.1u

2

1

N505

7805

SDA

4

9V

3

SCL

5

GND

2

SIF

1

GND

6

L-OUT

7

R-OUT

8

FSC

9

R

MTS

FM_

OUT

R-OUT
L-OUT

9V

FM-OUT

L-

O

U

T

R

-OUT

SCL1

SDA1

VD510

HZ12B2

1W

R531

1W

SW901

VOL-

SW902

VOL+

SW903

CH-

SW904

CH+

SW905

MENU

R909

150K

R906

8K2

R905

4K7

R904

3K3

R903

2K2

R902

1K

C902

33u

R908

33K

R907

12K

SW906

AV/TV

3

1

2

XS902

PIN3

POWER

SW907

KEY

1

2

X202

*

C408

0.01

4

7

3

5

8

G

R

B

HV

6

2

XS403

CRT

V401

2SC2688

V402

2SC2688

V403

2SC2688

R401

100

R402

100

R403

100

R404

390

R405

390

R406

390

R408

4K7

R409

4K7

R407

4K7

C401

390p

C402

390p

C403

390p

V404

C1815

C401

100p

C402

100p

C403

100p

C407

10u 16V

R411

1K8

R412

12K

R410

1K2

2W

R419

15K

2W

R420

15K

2W

R421

15K

R413

2.7K

R414

2.7K

R415

2.7K

1

VD401

IN4148

1

VD402

IN4148

1

VD403

IN4148

R CRT

G CRT
B CRT

R CRT

G CRT

B CRT

C409

250V 10u

R419

3.3 1W

C410

1n 2KV

2

4

1

3

XS402

PIN4

12

 

13

 

14

 

CRT

 B

CRT

 R

CRT

 G

CRT G

CRT R

CRT B

4

3

5

2

1

6

XS401

*

R410

330

R411

330

R412

330

*

C707

4.7u/16V

2

4

1

3

X201

PIN4

KE

Y1

KE
Y1

SDA

SCL

CON

CO

N