Sanyo EP58B specifications LA71750EM, LA71206M/7M

Video and Audio Signal-Processing IC

LA71206M/7M

Overview

The LA71206M and LA71207M are video and audio signal processing (Y/C/A) system ICs for NTSC VHS VCRs. Chip internal trimming is used to make these ICs fully adjustment free.

These ICs significantly reduce the number of peripheral components required, thus providing substantial cost savings in the signal- processing board.

Functions

NTSC VHS VCR video signal record and playback processing

VHS VCR audio signal record and playback processing

I2C bus serial control

Package: QFP80 (14 14)

Block Diagram

HA SW

AUDIO-MUTE

C-ROT

RF SW

PB C OUT

CCD

0.01∝F

ALWAYS

COMP

ENV

∝

1.8k

Ω

∝

V

CC

1 F

1 F

REC C MONI

5V

OUT

DET

S.C. IN

DATA IN CLOCK IN

C-VCC

+

3.58M

+

680kΩ

0.022∝F

0.01∝F

10kΩ

20kΩ

20kΩ

10kΩ

8.2kΩ

NTSC 1.2kΩ

+ 1∝F

4Fsc

0.01∝F

0.1∝F

56

55

54

53

52

50

49

48

47

46

45

44

43

42

41

60

59

58

57

51

COMP

ENV

AUDIO

C-ROT

C-GND

C-V

CC

ALWAYS

VDD

4F sc

CLOCK

VCC

61

KILL OUT

DET

MUTE

RF-SW

SERIAL

320FH

SLD

5V

PLL

VSS 40

VXO1

2.2kΩ

DET

HA SW

IN

VCO

R

0.047∝F

DECODER

HA

HA-GND

62

P

R

TIMMING

OUT

39

GND

OUT

REC

PB

REC

63

CHROMA

CCD

DRIVER

AUTO-BIAS

VSS 38

VCC

DET

APC

APC

AFC

0.047∝F

64

ACC

LA89964

37

100kΩ

CCD

CLAMP

DET

BEFORE

IN

0.047∝F

+

100kΩ

65

R

P

BGA

36

P

BGA

1∝F

EP (Hch)

VCA

66

R

P

R

BGA

R

P

AFTER

CNC

VCA

35

+

EP (Lch)

H

1∝F

3.58M

PB

67

P

CLAMP

34

+

I

BPF2

AMP

Main

B-DP

1∝F

HA VCC

68 HA VCC

C-LPF

VCP 33

+

CONV

AMP

B.D.

1∝F

TOLERANCE

69

ACC

3.58M

1

32

+

Video IN1

LESS THAN 1%

2

for REC CURRENT 1.5kΩ

P

AMP

R

RPF1

10∝F

75Ω

70

4.21M

PB-C

3

REG4V

31

adjustment

+

BPF

ACC

VIDEO

DET

AGC

0.1∝F

71

HA

Sub

P

P

R

YNR/COMB

1/2

30

+

Video IN2

PRF GND

CONV

R

R

DFTAIL

10∝F 75Ω

CLAMP

BAL

72

H

FNH

P

FBC

29

+

P

N.L.

TC1

SP (Hch)

PR-C

1∝F

I

NL

MAIN

DFFM

R

73

Y-LPF

28

+

R

HA

FMPHA

FMPHA

Video IN3

R

Y/C

P

Ω

V

SP (Lch)

NC1

∝

75

CC

FM

MIX

R

AGC

10 F

74

P

27

+

51Ω

MOD

P

TC2

+B=5V

R-EQ

NORMAL

22∝F

+

A-GND

75

A-GND

TEST

QV-QH

6DB

26

470∝F 75Ω

DOUBLE

FM

SUB

100Ω

Audio IN1

VIDEO OUT

22kΩ

76

1

LIM

DEM

LPF

SYNC

25

C.SYNC OUT

0.1∝F

47kΩ

SEP

0.1∝F

2

ALC

R

LINE

REC

MA IN

3

LPF

V SYNC OUT(REC)

3.9kΩ

77

A-V

CC

P

AMP

FM-EQ

DF-FM

V.SYNC

24

∝

QV/QH INS(PB)

100

A-VCC

SEP

F

Audio IN2

ALC

BIAS OSC

78

DET

VREF

P

R

FM

PB

S-EQ

Y-VCC23

Y-VCC

47kΩ

P

R

P

R

0.1∝F

AGC

FM-EQ

560Ω

3.9kΩ

+

79

FB.EE

PB.EE

REC

MUTE

VHS

SQPB

22

22∝F

AMP

+ 1∝F

1kΩ

Audio IN3

EQ

REC:LP.EP

AE

47Ω

4.7kΩ

2.2Ω 2SD734

80

AMP

PB :EP

AUTO

PHASE

PHASE

FM

MAIN

B

21

47kΩ

0.022∝F

(M)

0.1∝F

Vret

BIAS

EQ

EQ

AGC

Y-GND

EMPHA

S

+

0.01∝F

3.9kΩ

2.3V

SP.LP

fo-ADJ

Q-ADJ

FIL

FIL

DET

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

FE

47∝F 0.033∝F

8.2kΩ

33∝F+

∝

+

+

∝

0.1∝F

0.1∝F

12kΩ

330kΩ

2200 P

390

P

1.5kΩ

4.7∝F

1∝F

200∝P

R/P

2SC3331

2SA1318

10kΩ

27kΩ

+10∝F

REC/PB

M EMPH

2.2kΩ

27kΩ

LINE OUT

TO MICOM

0.01∝F

Y-FM

PB EQ

MONI

1kΩ

(PB-Low)

150Ω

1000∝P

1∝F

+

1kΩ

2SC3331

Video and Audio Signal-Processing IC

LA71750EM

Overview

The LA71750EM is a video signal-processing system IC that supports the PAL (G, B and I) 4.43 NTSC, MESECAM, and NAP (G, B, and I) formats for VHS VCRs. Chip internal trimming is used to make this IC fully adjustment free.

This IC significantly reduces the number of peripheral components required, thus providing substantial cost savings in the signal- processing board.

Additionally, this IC also supports the NAP standard (NTSC to PAL conversion) that is now common in Europe and China.

Functions

PAL VHS VCR video signal record and playback processing

VHS VCR audio signal record and playback processing

I2C bus serial control

Package: QIP100EJ (14 20)

Block Diagram

OSD

INMAEMPHA

OUT 1.2kΩ 220P

6.8kΩ

130P2.7kΩ

18kΩ

10kΩ AUD-MUTE

18kΩ

10kΩ

DATASERIALIN

CLOCKSERIALIN

CSYNC OUT

VSYNC OUT

VideoOUT 1

OSDTo etc

VideoOUT 3

SCART2(DEC)To CHARA. INS.

VideoOUT 2

SCART1(TV)To

CANAL DECODER

OSD(PB)

INVideo4

FRONT

INVideo3 SCART2(DEC)

DECODER

INVideo5

SW1 FIXED ON IN1

REC-MUTE

IN - SW - HA

IN - ROT - C

IN - SW - RF

(1Vpp)

VPS OUT

CONTROL

REC/PB

SUB

for H.A.

Y-FM

TITLE

IN STANDBY MODE

4.7kΩ

+

DRV

DRV

DRV

+

+

+

GND

SW2 FIXED ON IN3

80

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

54

53

52

51

SW3 FIXED ON IN2

PHASE

PHASE

FM

FBC1 Y-VCC

Y-GND

AGC

FBC3

ALWAYS

AGC

FRAME

COMPEN

81

COMPEN

REC

AGC

W/D

NL

DET

R

FBC1

P

SERIAL

SYNC

6DB

TC2 VIDEO

DET

CLP5

5V CLP4

TC1

50

Video IN 2

fo-CTL

Q-CTL

FM-EQ

DETAIL

DECODER

AGC

CAR

SCART1(TV)

CLIP EMPHA

ENH

SEP

AMP

BAL

+

82

P

R

P

AGC BYPASS

4

VCA

49

HA GND

FM

PB_FM

P

R

P

R

3

CLP3

SW1

2

DET

AGC

EQ.

1

Y-DELAY

60B

Mute

CLP2

Video IN 1

COMP OUT

83

5

48

AGC NORMAL

AMP

SW2

4

REC

FM

PHASE

3

CLP1

TUNER

MAIN

R

60B

Mute

+

Chara

ENV DET

84

ENV

FM-EQ

MOD COMPEN

DE-EM

FBC3

Y/C PB_C

AMP

2

REG

47

INS.

P

SW3

1

2.2kΩ

DET

MIX

4V

REC CURRENT IS DECIDED

85

REC

WHEN SQPB, DOUBLE

FM

SUB

Y

C

PB_Y

46

BY THIS RESISTOR VALUE,

FM AGC2

F-TEST

PIC

+ 86

REF

EQ BYPASS

LIM

DEM

LPF

1/2

CTL

+

AND A TOLERANCE OF THE

REC

Y

VCA

FBC2

45

RESISTOR VALUE WHICH

FM AGC2

P

R

P

NC1/2

DET

WE RECOMMEND IS ±1%

87

FILT

Y-DELAY

PB H OUT 44

PB H OUT

EP (Hch)

P

Y-LPF

NL

REC:ON

R

88

R

Y.N.R

DeEM

FBC2

DELAYED Y_DELAY

43

+

Use of commonness is possible

Sub

89

R

CONV

SIGNAL

CCD 42

EP (Lch)

P

H

BPF2

P

R

NT/NT

VCC

90

L

C

BPF3

FRAME 41 GND

R

P

R

C-MAIN

LC89984/85

H.A V

91

H.A.

KIL

ACC

BPF1

40

P

D.L

1H/2H

CCD

CC

VCC

Y

Main

B-UP

GND

REC

+

C-LPF

EQ

INV

D.L

92

HA

CONV

AMP

RD 39

FM AGC2

ACC

PRE GND

C

R

Fsc

DET

93

H

REC

R

D.L

C-DELAY

M/M

CLK

VCO

38

P

R

IN

SP (Hch)

L

BGA

CCD

EQ

SYNC SLICE PED.SIDE

+B(5V)

REC:ON

P

PB

LPF

COMB

94

R

R/PA

PB

BGA-A

2FSC-OUT 37 3.9kΩ +

Use of commonness is

P

AMP

possible

95

R

PB

DET

P/S AFC 36

4.7kΩ

BGA-B

SYNC

SP (Lch)

P

PB REC/EE

FILT

8200P

96

KIL

35

SECAM DET

560Ω

ATT

B.D.

KIL

97

A.GND

DET

PAL M DET

34

R/P-EQ

REC Vref

NAP

REC

LP/EP

SEPARATE

INVERTER

ALC

R

P

R

P

AFC

AE

98

(REC)

R/P-EQ

PB

33

R/P-EQ

47Ω

1kΩ

REC

PB/EE

100Ω

PB/EE

COMMON

LINE

ALC

1

2 3

NAP

APC

99

AMP

SEPARATE

BPF

REC

32

FE

2.2Ω

SP

EQ

AMP

DET

APC

REC:LP/EP

AUTO

AMP

CNC

+

100

BIAS

PB:EP

SP/LP

LPF

Vref

MUTE

AUDIO

CHROMA

VCO

SLD

VXO2

VXO1

31

ACC

2.3V

HD-SW

C-VCC

CTL

A-VCCDET C-GND

DET

FRAME

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

28

29

30

10kΩ

+

1.2kΩ

1200P

330kΩ

12kΩ

5.6kΩ

+

+

+

+

1.2kΩ

Ω8.2kPAL-GBI

GND

27kΩ

2SC3331

10kΩ

+

2kΩ

22kΩ

1200P

+ 0.01∝F

LINEOUT

12kΩ

AudioIN1

AudioIN2

AudioIN3

OUTCREC:LOW IN)C(SECAM OUTPB:FM OUT)FM(SECAM

+

OUTPB:C IN)C(SECAM

+

PAL-MN

1kΩ

2SA1318

R/P

180Ω

2SC3331

+

53 SANYO TV . VCR SANYO TV . VCR 54