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MGR839

M

M

M

M

TUL

head drum

AH1

AH2

5 V

1

2

3

4

40

39

37

35

36

38

5

6

7

SAP

TUL

TUR

E1L

E1R

E2L

E2R

8

9

10

N

dub

11

normal select

input select

volume right

M

normal

input

level

RF converter

mute

volume left

decoder

select

+1 dB 12 V

TDA9605H

1.7 or 1.8 MHz

SAP

21

22

TUR

DCL

DCR

HID

HID

SDA

SCL

26

25

24

23

TUL

E1L

SAP

TUR

E1R

E2L

E2R

VCC

SAP

+

+

+

+

+

+

41

44

42

43

standby select

SUPPLY

34

27

29

28

M

+

E2L

E2R

+

HF LFP

L

DCR

R

N

dub

HF LIMITER

PEAK HOLD

LEVEL

DETECTOR

PLL

CCO

(1.7 or

1.8 MHz)

LEVEL

DETECTOR

DROPOUT

CANCELING

HI-FI

DETECTOR

1.3 or 1.4 MHz

HF LFP

HF AGC

M

HF LIMITER

PLL

CCO

(1.3 or

1.4 MHz)

envelope output

select

+ record

envelope

output

select

+ playback

DCL

mute

R

L

PEAK HOLD

AUTO-MUTE

line select

output select

AUTN

AUTN

M

NOISE

SUPPRESSION

NOISE

SUPPRESSION

RECTIFIER

NOISE REDUCTION

FM (DE-)MODULATOR

HEAD AMPLIFIER

I/O CONTROL

CCA

W

+ FM

5th ORDER

AUDIO LPF

COMPRESSOR

EXPANDER

DETECTOR

AUDIO

CLIPPER

INTERFACE

M = mute

control

HID

RM

RM

HID

AF/HF envelope

RM

19

20

16

15

17

18

13

14

AUDIO

CLIPPER

12

30

31

32

33

RECTIFIER

CCA

W

+ FM

5th ORDER

AUDIO LPF

COMPRESSOR

EXPANDER

DETECTOR

10 k

Ω

18 k

Ω

470

Ω

47

µF

10 nF

100 nF

100 nF

2.7 k

Ω

33 k

Ω

10

µF

10

µF

47

µF

6.8 nF

2.7 k

Ω

33 k

Ω

10

µF

10

µF

47

µF

6.8 nF

10

µF

decoder

line

10

µF

RFC

10

µF

10

µF

10

µF

3.3 M

Ω

10

µF

220 nF

10

µF

linear audio

SAP

tuner

CINCH

ext1

ext2

aux

220 nF

(11

×)

39 k

Ω

(2%)

47

µF

2.2

µF

10 nF

9 to 12 V

playback.

+

record-mute,

recording

carrier ratio select,

record-mute

playback head

amplification,

record head

current

Fig.14 Application diagram.