LG DT-65780M Diagram

3-18 3-19

DIAGRAMAS DE BLOQUES

1. DIAGRAMA DE BLOQUES DE LA FUENTE DE PODER (SMPS), DIAGRAMA 1

BD101

BD101

PW101

BR

(BK)BL(WH)

V101

F101

!

!

IC105

F102

IC106

!

IC102

T102

IC103

!

!

T101

!

C103

5.0V REG
BLOCK

( IC152, C172 )

C113C114

C122

!!

!

!

PSW01

32VA

5VA

12VA

PWR SENSE

PSV01

FD(+)

FD(-)

-29VA

33VA

13VA

3.8VA

5.3VA

LINE FILTER

BLOCK

( C101, C102,

L101, L102 )

RECTIFIER & SMOOTHING

BLOCK

( D129, C144, L124, C147 )

FEED-BACK

BLOCK

( R132, R133, C148,

R134, R135, R136,

R137 )

RECTIFIER &
SMOOTHING

BLOCK

(D123, C130, ZD121, R127)

RECTIFIER & SMOOTHING

BLOCK

( D126, C140, L122, C141 )

RECTIFIER &
SMOOTHING

BLOCK

( D125, R129, C138 )

FEED-BACK

BLOCK

( R122, R121, C136,

R123, R124, R125,

R126 )

12V REG

BLOCK

( IC153, C139 )

PWR SENSE

BLOCK

( R184, R185 )

RECTIFIER & SMOOTHING

BLOCK

( D124, C137, R128 )

DRIVE & S/W BLOCK

QUASI-RESONANT BLOCK

( IC101, R114, R115, C123, C107,
BC101, D108, R101, D102, R102,
D103, R106, ZD102, Z101, C108,

R104, C109, C110)

RECTIFER & SMOOTHING

BLOCK

( D122, C131, R131,

C132, C133, C135, L122 )

SNUBBER

BLOCK

( R110, C115,
D104, C117 )

DRIVE & S/W BLOCK
SOFT-START BLOCK

( R107, R108, C121, R105,

C120, C119, ZD1103, D105,

R111, BC102 )

RECTIFIER & SMOOTHING

BLOCK

( D127, C142, L123, C146 )

DT-65780M's

3-20 3-21

2. DIAGRAMA DE BLOQUES DE LA FUENTE DE PODER (SMPS), DIAGRAMA 2

FD(+)

FD(-)

-29VA
GND
33VA
GND
13VA
GND

3.8VA

3.8VA
GND

5.3VA

5.3VA
GND
GND

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

TO SYS

FD(+)

TO SYS

FD(-)

TO SYS

-29VA

TO TU

33VT

TO TU

REG 12VT

TO SYS

5.3VA

TO TU/SYS/ Hi-Fi

5.2VA

TO AVCP

REG 5V

FROM µ-COM

PWR CTL 'H'

PVS01

5.3VA
8V

GND

REG 12VT

3.3V

3.3V
5V
5V

GND

2.5V

GND
GND

1
2
3
4
5
6
7
8

9
10
11
12

PVD01

33VT BLOCK

(Q163, R168,

R169, R170)

12VT BLOCK

(IC164, C162, R171)

8V BLOCK

(IC160, D163,

C163, R161)

3.3V BLOCK

(IC161, D164, C173)

2.5V BLOCK

(IC162, D165, C172)

REG 5V

(Q166, C166, C167,

R174, ZD161)

5.2V BLOCK

(Q167, C168, R175,

R176, R177)

PWR CTL BLOCK

(Q169, C170, R181,

R182, R183)

5V BLOCK

(Q168, R178, R179,

R180, C169)

DT-65780M's

3-22 3-23

3. DIAGRAMA DE BLOQUES DEL SINTONIZADOR Y DE LOS RECEPTÁCULOS

1
2
3
4
5
6
7
8
9

10

11
12
13
14
15
16

A.IN

TU701

GND

A.IN

MOD CTL

5.0V

VCR'H'

V.IN

GND

7
6
5
4
3
2
1

PVT01 PVT01

7
6
5
4
3
2
1

CH S/W
REG 5V
CONTROL
V.IN
RF AGC
NC
ENABLE
CLOCK
DATA
AFT
A.OUT
SIF
TU 30V
NC
V.OUT

GND

NC

CLOCK

DATA

AFT

GND

SIF

TU 33V

V.OUT

GND

PVT02 PVT02

10

9
8
7
6
5
4
3
2
1

10

9
8
7
6
5
4
3
2
1

C731
10µ/16V

C878
56p

R703

3.9K

C701

4.7µ/50V

C701
15PF

C704

0.1µ

C707
15PF

R708
680

R707
680

C702

220µ/6.3V

C871

4.7µ/50V

C711

R710

C712
1500p

C708

0.1µ

C703

10.1µF

R708
33K

R706
10µM

R711

1.0K

R702

1.0K

57

158

732

IC801

TU 33V

TU VIDEO

71

72

100

CLOCK

671MOD VIDEO

26VCR'H'

1065.0V

81MOD CTL

2IC801

DATA

AFT

DT-65780M's

3-24 3-25

4. DIAGRAMA DE BLOQUES DEL CIRCUITO Y/C

EP PB 'A'

EP PB 'B'

SP PB 'B'

SP PB 'A'

64

59 58 57 55 54 53

65

67

72

74

ACC

DET

ENV
DET

C-ROT
RF-SW
IN

Y/C ENA

Y/C DATA

Y/C CLOCK

V.OUT

AUDIO

MUTE

HA SW

P

P

P

C-LPF

MAIN

CONV

3.58M
BPF2

ACC
AMP

ACC
DET

CLAMP

Y

LPF

CLAMP

CLAMP

IN

OUT

VCA

CCD

3.58M
BPF1

Y/C

MIX

6dB

DOUBLE

LIMFMDEM

SUB
LPF

MAIN

DE-EM

PB

FM-EQ

FM

AGC

CNC

YNR

COMB

4.21M
BPF

SUB

CONV

39

37

36

34

26

22

21

P

B

(Modo de Reproducción)

EP REC

SP REC

57

V. H/SW55Y/C ENA

54

Y/C DATA

53 51 50 49 48 47

39

38

37

36

34

32

30

28

22

21

20

73

70

69

66

Y/C CLOCK

X-TAL

3.58MHZ

C-LPF

MAIN

CONV

4.21M
BPF

SUB

CONV

DETAIL

ENH

MAIN

EMPHA

REC

FM-EQ

4.7K

FM

MOD

Y

LPF

YNR

COMB

3.58M
BPF1

LINE2

26

V.OUT

DVD

TU/LINE1

VIDEO

AGC

CLAMP

CLAMP

CLAMP

IN

CCD

OUT

VCA

SW

BLOCK

IC302

NL

EMPHA

B-UP
AMP

ACC
AMP

ACC
DET

BGA

REC
APC

REC
AFC

320FH

VCO

SLDVX01

SERIAL

DECODER

R

R

B

DT-65780M's

(Modo de Grabación)

3-26 3-27

5. DIAGRAMA DE BLOQUES DEL AUDIO NORMAL

IC301

LA71206M

SIF

A_IN

RF_MOD

IC801

LA72670M

TUNER

TU701

10

76

DET

NORMAL

AUDIO

OUT

LINE AUDIO(R) IN

LINE AUDIO(L) IN

REAR JACK

REAR Jack

A. OUT (L)

ALC

SIF

DE MOD

INPUT

SELECT

OUTPUT

SELECT

4

6

13

1

57

9

2

71

117312

74

80

78

A. OUT (R)

DVD AUDIO

(System)

IC801

LA72670M

IC301

LA71206M

AMP

EQ

AMP

78

410

A. OUT (R)

MOD. OUT

DATA

CLOCK

R/P HEAD

N.A.IN

53

ENA

55 54

5

4

6

From u-COM

80

A. OUT (L)

2

OUTPUT

SELECTOR

EQ

3

2

SIF

DE MOD

INPUT

SELECT

OUTPUT

SELECT

IC301

LA71206M

SIF

IC801

LA72670M

TUNER

TU701

10

76

DET

NORMAL

AUDIO

OUT

LINE AUDIO(R) IN

LINE AUDIO(L) IN

REAR Jack

A. OUT (L)

REC

AMP

4

6

13 57

RF MOD.

A_IN

1 2

9

71

80

78

A. OUT (R)

DT-65780M's

ALC

9

1) Modo EE 2) Modo de Reproducción 3) Modo de Grabación