Skyworth 8M79B Chassis, Service Manual

5

5

4

4

3

3

2

2

1

1

D

D

C

C

B

B

A

A

mute

mute

AMP_LIN

GAIN0

GAIN1

SHUTDOWN

MUTE_TDA3121

GAIN0

GAIN1

AMP_RIN

SHUTDOWN

MUTE_TDA3121

mute

AMP-PLout

AMP-PRout

AMP_LIN

AMP_RIN

OP_VCC1

OP_VCC1

PWD_MT

AUOUTL2

AUOUTR2

AMP-PLout

AMP-PRout

mute

mute

OP_VCC1

12-24

12-24

12-24

12-24

12-24

12-24

12-24

6VBuf1

5VA

12VA

5VA

5VA

MUTE_AMP

2

AUOUTR0

2

AUOUTL0

2

AUOUTL2

2

AUOUTR2

2

HEADPHONE_DET 2

Title

Size

Document Number

Rev

Date:

Sheet

of

9/10

0.1

AUDIO

A2

9

10

Thursday, August 04, 2011

Title

Size

Document Number

Rev

Date:

Sheet

of

9/10

0.1

AUDIO

A2

9

10

Thursday, August 04, 2011

Title

Size

Document Number

Rev

Date:

Sheet

of

9/10

0.1

AUDIO

A2

9

10

Thursday, August 04, 2011

HOLE

Power Down MUTE

Place close to OP

TDA3121

EMI Cover

AMPLIFIER AUDIO pre-ap

Near MST.IC

Ground in the middle of the L/R

MUTE_AMP :  LOW = MUTE

MUTE_TDA3121 :  HIGH = MUTE

TPA3121 MUTE PIN
LOW:OPERATING
HIGH:MUTE

2010-5-8
Close to MSD309PX

2010-4-2

HeadPhone Out

+

CA84

100uF/16V

+

CA84

100uF/16V

C179

1nF

C179

1nF

R442 24K

R442 24K

P6

PHONEJACK STEREO SW 180d

P6

PHONEJACK STEREO SW 180d

4

3

2

1

R301

47K

R301

47K

CA464

100uF/16V

CA464

100uF/16V

C264
1uF

C264
1uF

+

CA99

220uF

+

CA99

220uF

L5

10uH/Inductor

L5

10uH/Inductor

1

2

3

4

5

R374

47K

R374

47K

H13

TPAD

H13

TPAD

1

C496 100pF

C496 100pF

C343 2.2uF

C343 2.2uF

R360

10K

R360

10K

C497 100pF

C497 100pF

C270

1uF/35V

C270

1uF/35V

L1

CON2_1

L1

CON2_1

2

1

3

4

5

6

+

CA55

220uF/35V

+

CA55

220uF/35V

R370

1.5K

R370

1.5K

H2

TPAD

H2

TPAD

1

R443 24K

R443 24K

R366

NC/10K

R366

NC/10K

D126
ESD

D126
ESD

1

2

C340 2.2uF

C340 2.2uF

R439

10K

R439

10K

CON5

CON5

CON5

CON5

2

1

+

CA82

220uF/35V

+

CA82

220uF/35V

H4

NC

H4

NC

1

2

3

4

5

6

7

8

9

U54

TPA312X

U54

TPA312X

PVCCL

1

SD

2

PVCCL

3

MUTE

4

LIN

5

RIN

6

BYPASS

7

AGND

8

AGND

9

PVCCR

10

VCLAMP

11

PVCCR

12

PGNDR

13

PGNDR

14

ROUT

15

BSR

16

GAIN1

17

GAIN0

18

AVCC

19

AVCC

20

BSL

21

LOUT

22

PGNDL

23

PGNDL

24

THERMAL

25

C

236

10n

C

236

10n

C341

0.1uF

C341

0.1uF

R303

100K

R303

100K

C258 0.22uF

C258 0.22uF

H14

TPAD

H14

TPAD

1

R337

NC/2.2K

R337

NC/2.2K

C244

1nF

C244

1nF

C254

4.7u

C254

4.7u

R365

1.5K

R365

1.5K

R280

10K

R280

10K

U19

p23051

U19

p23051

1

2

3

R278

100R

R278

100R

+

CA83

470uF/16V

+

CA83

470uF/16V

R299

100K

R299

100K

+

CA85

220uF/35V

+

CA85

220uF/35V

H8

NC

H8

NC

1

2

3

4

5

6

7

8

9

C253

1uF

C253

1uF

R335

2.2K

R335

2.2K

C251

1u

C251

1u

H12

TPAD

H12

TPAD

1

H5

NC

H5

NC

1

2

3

4

5

6

7

8

9

10

D127
ESD

D127
ESD

1

2

H7

TPAD

H7

TPAD

1

R306

10k/NC

R306

10k/NC

H11

TPAD

H11

TPAD

1

R406

330R

R406

330R

H18

LOC-HOLE

H18

LOC-HOLE

1

R367

10K

R367

10K

+

CA86

220uF/35V

+

CA86

220uF/35V

R334

2.2K

R334

2.2K

R368

NC/10K

R368

NC/10K

C266

0.1uF

C266

0.1uF

R336

NC/2.2K

R336

NC/2.2K

C252

4.7u

C252

4.7u

H9

TPAD

H9

TPAD

1

R441

10K

R441

10K

C392
2N2

C392
2N2

R361

10K

R361

10K

H15

TPAD

H15

TPAD

1

D41

1N4148

D41

1N4148

R461

33K

R461

33K

R283

10K

R283

10K

CON4

CON2

CON4

CON2

2

1

Q424

3904

Q424

3904

1

2

3

C345

NC/200P

C345

NC/200P

R300

100K

R300

100K

H6

NC

H6

NC

1

2

3

4

5

6

7

8

9

Q447

3904/NC

Q447

3904/NC

1

2

3

R296

24K

R296

24K

C344

NC/200P

C344

NC/200P

H1

NC

H1

NC

1

2

3

4

5

6

7

8

9

+

CA98

220uF

+

CA98

220uF

R416

33K

R416

33K

R437

100

R437

100

R397

10R

R397

10R

+

CA80

220uF/35V

+

CA80

220uF/35V

H3

NC

H3

NC

1

2

3

4

5

6

7

8

9

C342

1nF

C342

1nF

R418

33K

R418

33K

-

+

U45B

TL062

-

+

U45B

TL062

5

6

7

8

4

R294

NC/24K

R294

NC/24K

C267

1uF

C267

1uF

D40

1N4148

D40

1N4148

R460

33K

R460

33K

R293

10K

R293

10K

H10

TPAD

H10

TPAD

1

C263

1uF

C263

1uF

R295

0

R295

0

H19

LOC-HOLE

H19

LOC-HOLE

1

R438

470

R438

470

R

320

12K

R

320

12K

+

CA81

47uF/16V

+

CA81

47uF/16V

R404

47K

R404

47K

D39
1N4148

D39
1N4148

C262 0.22uF

C262 0.22uF

L6

10uH/Inductor

L6

10uH/Inductor

1

2

3

4

5

R

317

12K

R

317

12K

-

+

U45A

TL062

-

+

U45A

TL062

3

2

1

8

4

R398

10R

R398

10R

C268

0.68uF

C268

0.68uF

H16

TPAD

H16

TPAD

1

R286

NC/10K

R286

NC/10K

Q433

3904

Q433

3904

1

2

3

R316

100R

R316

100R

R288 4.7K

R288 4.7K

R369

10K

R369

10K

R401

330R

R401

330R

D37

NC/1N4148
D37

NC/1N4148

+

CA97

220uF

+

CA97

220uF

C243

1nF

C243

1nF

R333

10k

R333

10k

+

CA96

220uF

+

CA96

220uF

Q16

NPN_3904

Q16

NPN_3904

1

2

3

C

248

1uF

C

248

1uF

Q445

3904

Q445

3904

1

2

3

+

CA100
220uF

+

CA100
220uF

R405

330R

R405

330R

R407

47K

R407

47K

Q622

3906
Q622

3906

1

3

2

CA465

100uF/16V

CA465

100uF/16V

C257

1uF

C257

1uF

C

237

10n

C

237

10n

C269
0.68uF

C269
0.68uF

C250

1u

C250

1u

R395

330R

R395

330R