HIT HA12177, HA12175, HA12174, HA12173 Datasheet

HA12173 Series

Audio Signal Processor for Car Deck and Cassette Deck

(Dolby B/C-type NR with PB Amp)

ADE-204-016

1st Edition

Nov. 1992

Description

HA12173 series are silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor and PB equalizer system in one chip.

Functions

• PB equalizer × 2 channel

• Dolby B/C-NR × 2 channel

• Music sensor × 1 channel

Features

• Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully

electronic control switching built-in.

• 2 type of input selection (RADIO/TAPE) is available.

• Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in.

• Available to change music sensing level by external resistor.

• Music sensing level selection is available with fully electronic control switching built-in.

• Available to change frequency response of music sensor.

• NR-ON/OFF and REC/PB fully electronic control switching built-in.

• 4 type of PB-out level.

• Available to allow common PCB designs with HA12163 series.

* Dolby is a trademark of Dolby Laboratories Licensing Corporation.

A license from Dolby Laboratories Licensing Co r por ation is required for the use of this IC.

HA12173 Series

Ordering Information

Operating voltage range*

Products PB-OUT level REC-OUT level Dolby-level Min Max

HA12173 300 mVrms 300 mVrms 300 mVrms 7.0V 16V HA12174 450 mVrms 300 mVrms 300 mVrms 8.0V 16V HA12175 580 mVrms 300 mVrms 300 mVrms 9.5V 16V HA12177 775 mVrms 300 mVrms 300 mVrms 12.0V 16V Note: 1. The minimum operating voltage of HA12173 series are defferent from the HA12163 series

(Dolby B - type).

1

Pin Description (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table show typical value)

Terminal

Pin No.

2, 41 TAI 100 kΩ VCC/2

name Zin

DC voltage Equivalent circuit Description

Tape input

VCC/ 2

4, 39 RAI Radio input 25 MSI Music sensor

rectifier input

10, 33 HLS DET — 2.5 V Time constant

pin for rectifier

11, 32 LLS DET 3 BIAS — 0.28 V

GND

Reference current input

Rev.1, Nov. 1992, page 2 of 66

HA12173 Series

Pin Description (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value) (cont)

Terminal

Pin No.

24 MS DET — V

19 MS GV 100 kΩ —

40 RIP — VCC/2 Ripple filter

name Zin

DC voltage Equivalent circuit Description

CC

GND

DGND GND

Time constant pin for rectifier

Mode control input

Rev.1, Nov. 1992, page 3 of 66

HA12173 Series

Pin Description (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value) (cont)

Terminal

Pin No.

name Zin

43, 56 EQ OUT — VCC/2

DC voltage Equivalent circuit Description

V

CC

GND

Equalizer output

6, 37 PB OUT Play back

(Decode) output

30 MS V

REF

Reference voltage buffer output

26 MA OUT Music sensor

amp output

47, 52 V

REF

Reference voltage buffer output

12, 31 REC OUT Recording

(Encode) output

8, 35 SS2 Spectral skewing

amp. output

44, 55 EQ OUT-M — VCC/2

V

CC

Equalizer output (Metal)

Rev.1, Nov. 1992, page 4 of 66

GND

HA12173 Series

Pin Description (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value) (cont)

Terminal

Pin No.

21 MS OUT — —

22 V 23 MS V 20 D GND — 0V — Digital (Logic)

27 MS GND Music sensor

49, 50 GND Ground 48, 51 FIN — VCC/2 PB - EQ input for

name Zin

CC

—VCC— Power supply

DC voltage Equivalent circuit Description

MS V

D GND

CC

Music sensor output to MPU

ground

forward

46, 53 RIN PB - EQ input for

reverse

45, 54 NFI Negative

feedback terminal of PB EQ amp.

28 NOI Negative

feedback input for normal speed

29 FFI Negative

feedback input for FF or REW

Rev.1, Nov. 1992, page 5 of 66

HA12173 Series

Pin Description (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value) (cont)

Terminal

Pin No.

13 C/B 100 kΩ —

14 ON/OFF 15 REC/PB 16 TAPE/RADIO 17 120 µ/170 µ 18 F/R 7, 36 SS1 — VCC/2 Spectral skewing

name Zin

DC voltage Equivalent circuit Description

Mode control input

D GND

GND

amp. input

9, 34 CCR — VCC/2 Current

controled resistor output

1, 5, 38, 42 NC No connection

Rev.1, Nov. 1992, page 6 of 66

Block Diagram

HA12173 Series

RADIO IN(L)

EQOUT(L)

42 41 40 39 38 37 30 29

43

120/70

44

45

46

V (L)

47

REF

48

GND

49

GND

50

51

V (R)

52

REF

53

54

55

120/70

56

EQOUT(R)

+

RIP

+

–

R/F

×1

R/F

–

+

BIAS

T/R

PBOUT(L)

+ –

RECOUT(L)

36 35 34 33 32 31

DOLBY B/C-NR

S/R

–

LPF

+

MS AMP

DOLBY B/C-NR

968713

1110

MS VREF

DET

MS GND

MS V

CC

V

CC

D GND

141254132

C/B

28

27

26

25

24

23

22

21

20

19

18

17

16

15

ON/OFF

+

MS OUT

(S/R)

MS G

V

F/R

120 µ/70 µ

TAPE/RADIO

REC/PB

V

CC

To Microcomputer

From Microcomputer

IN(R)

PBOUT(R)RADIO

RECOUT(R)

Absolute Maximum Ratings

Item Symbol Ratings Unit Condition

Supply voltage VCC max 16 V Power dissipation P

T

Operating temperature Topr –40 to +85 °C Storage temperature Tstg –55 to +125 °C

500 mW Ta≤85°C

Rev.1, Nov. 1992, page 7 of 66

HA12173 Series

Electrical Characteristics (Ta = 25°C Dolby level 300 mVrms (Rec-out pin))

HA12173 VCC = 9.0 V HA12174 VCC = 9.0 V HA12175 V

Item Symbol Min Typ Max Unit Test Condition Note

Quiescent current I

Q

Input HA12173 GvIA TAI 18.5 20.0 21.5 dB Vin = 0 dB, f = 1 kHz Amp. GvIA RAI 15.5 17.0 18.5 gain HA12174 GvIA TAI 22.0 23.5 25.0 Vin = 0 dB, f = 1 kHz

GvIA RAI 19.0 20.5 22.0

HA12175 GvIA TAI 24.2 25.7 27.2 Vin = 0 dB, f = 1 kHz

GvIA RAI 21.2 22.7 24.2

HA12177 GvIA TAI 26.7 28.2 29.7 Vin = 0 dB, f = 1 kHz

GvIA RAI 23.7 25.2 26.7 B-type Encode ENC –2k 2.8 4.3 5.8 dB Vin = –20 dB, f = 2 kHz boost ENC –5k 1.7 3.2 4.7 Vin = –20 dB, f = 5 kHz C-type Encode ENC –1k (1) 3.9 5.9 7.9 dB Vin = –20 dB, f = 1 kHz boost ENC –1k (2) 18.1 19.6 21.6 Vin = –60 dB, f = 1 kHz

ENC –700 9.8 11.8 13.8 Vin = –30 dB, f = 700 Hz Signal handling Vo max 12.0 13.0 — dB THD = 1%, f = 1 kHz *1 Signal to noise

S/N 60.0 64.0 — dB Rg = 5.1 kΩ, CCIR/ARM ratio

THD THD — 0.05 0.3 % Vin = 0 dB, f = 1 kHz Channel CT RL (1) 70.0 85.0 — dB Vin = 0 dB, f = 1 kHz RAI input separation CT RL (2) 50.0 60.0 — Vin = 0.6 mVrms, f = 1 kHz EQ input Crosstalk CT EQ → RAI 70.0 80.0 — Vin = 0.6 mVrms, f = 1 kHz EQ input

CT RAI → EQ 50.0 60.0 — Vin = 0 dB, f = 1 kHz RAI input PB - EQ gain Gv EQ 1k 37.0 40.0 43.0 dB Vin = 0.6 mVrms, f = 1 kHz 120 µ

Gv EQ 10k (1) 33.0 36.0 39.0 Vin = 0.6 mVrms, f = 10 kHz

Gv EQ 10k (2) 29.0 32.0 35.0 70 µ PB - EQ maximum

VoM 300 600 — mVrms THD = 1%, f = 1 kHz *1 output

PB - EQ THD THD - EQ — 0.05 0.3 % Vin = 0.6 mVrms, f = 1 kHz Noise voltage level

V

N

converted in input MS sensing level VON (1) –36.0 –32.0 –28.0 dB f = 5 kHz, Normal speed

VON (2) –18.0 –14.0 –10.0 f = 5 kHz, High speed

10.0 16.0 24.0 mA No input No Signal

— 0.7 1.5 µVrms Rg = 680 Ω, DIN - AUDIO

= 12.0 V HA12177 VCC = 14.0 V

CC

NR-B70 µ

Rev.1, Nov. 1992, page 8 of 66

HA12173 Series

Electrical Characteristics (Ta = 25°C Dolby level 300 mVrms (Rec-out pin)) (cont)

HA12173 VCC = 9.0 V HA12174 VCC = 9.0 V HA12175 V

Item Symbol Min Typ Max Unit Test Condition Note

MS output low

V

OL

level MS output leak

I

OH

current Control voltage V

IL

V

IH

Note: 1. HA12173 VCC = 7.0 V, HA12174 VCC = 8.0 V, HA12175 VCC = 9.5 V, HA12177 VCC = 12.0 V

—1.01.5V

—0.02.0µA

–0.2 — 1.5 V

3.5 — 5.3

= 12.0 V HA12177 VCC = 14.0 V

CC

Rev.1, Nov. 1992, page 9 of 66

HA12173 Series

Test Circuit

5 V

R29

R30

EQOUT (L)

10 k

SW22

PBOUT (L)

ON

RECOUT (L)

DC VM1

SW21

SW24

SW23

EQOUT(L)

OFF

LR

PBOUT(L)

RECOUT(L)

RAI (L)

DC SOURCE1

R27

330 k

R28

18 k

C21

2200 p

R33

5.1 k

EQIR (L)

EQIF(L)

SW25

A GND

C29

100 µ

+

CC

V

MS

+

R24

330 k

C14

0.01 µ

R25

47 k

C28

4700 p

R26

33 k

+

C15

2.2 µ

C18

2200 p

C20

2200 p

R32

+

C19

2.2 µ

+

C23

0.47 µ

R34

5.1 k

C24

0.1 µ

R35

5.1 k

R36

12 k

R38

330 k

R39

180

C25

0.01 µ

R40

680

+

R41

680

C27

22 µ

+

V

C13

0.33 µ

MS

DET

MSI

MA

OUT

MS

GND

FFI NOI

MS

VREF

REC

C16

0.1 µ

LLS

C17

0.1 µ

HLS

(L)

CCR

R31

560

(L)

SS2

(L)

SS1

22 k

PB

N.C.

(L)

RAI

+

RIP

C22

1 µ

(L)

TAI

N.C.

EQ

R37

18 k

EQ

(L)

NFI

(L)

RIN

C26

22 µ

(L)

VREF

(L)

FIN

49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 3334 32 31 30 29 28 27 26 25 24 23 22

GND

Note : The capacitor (C29) should

be connected.

It's recommended to be

connected close to the IC.

MS

2120

OUT

CC

D

GND

GV

MS

1918

F/R

17

/70µ

120µ

16

TAPE/

RADIO

/PB

1514131211109876543215655545352

REC

ON/

OFF

C/B

(L)

OUT

DET

OUT

(R)

REC

OUT

(L)

(R)

LLS

DET

(L)

(R)

HLS

DET

(R)

CCR

(R)

SS2

(R)

SSI

(L)

PB

(R)

OUT

N.C.

(R)

RAI

HA12173/4/5/7 (PB 1 Chip)

BIAS

(R)

TAI

N.C.

(L)

(R)

EQ

OUT

(L)

(R)

EQ

OUT-M

(R)

NFI

(R)

RIN

(R)

VREF

(R)

51

FIN

GND

50

R23

3.9 k

SW1SW2

R22

22 k

R21

22 k

SW3SW4

R20

22 k

R19

22 k

+

SW5SW6

R18

22 k

C33

22 µ

R17

22 k

C32

PB REC 120 µ 70 µ SER REP

22 µ +

+

C11

0.1 µ

C10

0.1 µ

OFF ON TAP RAD FOR REV

R16

22 k

SW7

C B

C31

22 µ

+

C12

2.2 µ

R13

560

R12

22 k

+

C8

2.2 µ C5

0.47 µ

+

R11

18 k

C4

0.1 µ R8

5.1 k

R7

12 k

R6

18 k

C3

0.01 µ

R2

680

++

C2

22 µ

R1

680

C1

22 µ

C7

R9

R5

R3

2200 p

5.1 k

330 k

180

EQIF(R)

SW16

SW13 SW12 SW11 SW10 SW9 SW8

SW14

C9

2200 p

C6

2200 p

EQIR (R)

RAI (R)

LR

SW15

DC SOURCE2

R10

5.1 k

ON OFF

DC SOURCE3

SW18

MSOUT

RECOUT(R)

PBOUT(R)

SW17

D GND

EQOUT(R)

AC VM1 AUDIO SG

L

R

RECOUT(R)

PBOUT(R)

SW19 SW20

EQOUT(R)

R15

R14

10 k

AC VM2

ANALYZER

DISTORTION

OSCILLO SCOPE

NOISE METER

Ω

Unit R:

C: F

Note

1) Resistor tolerance are ± 1%

2) Capacitor tolerance are ± 1%

Noise meter

with CCIR/ARM filter

and DIN-AUDIO filter

Rev.1, Nov. 1992, page 10 of 66

HA12173 Series

Functional Description

Power Supply Range

HA12173 series are provided with four line output level, which will permit on optimum overload margin for power supply conditions. And this series are designed to operate on either single supply or split supply.

Table 1 Supply Voltage

Item HA12173 HA12174 HA12175 HA12177

Single supply 7.0 V to 16.0 V 8.0 V to 16.0 V 9.5 V to 16.0 V 12.0 V to 16.0 V Split supply GND level ±5.0 V to 8.0 V ±5.0 V to 8.0 V ±5.0 V to 8.0 V ±6.0 V to 8.0 V

VEE level ±3.5 V to ±8.0 V ±4.0 V to 8.0 V ±4.8 V to 8.0 V ±6.0 V to 8.0 V

A. The lower limit of supply voltage depends on the line output reference level.

The minimum value of the overload margin is specified as 12 dB by Dolby Laboratories.

B. In case of using digital GND terminal referring to GND level, operating voltage range varies

depending on the condition at power on. On using the HA12173/174/175, use within the following ranges to avoid latch-ups.

When power on in NR-OFF mode: ±5.0 V to ±8.0 V When power on in NR-ON mode: ±5.7 V to ±8.0 V

C. In the reverse-voltage conditions such as ‘D-GND is higher than V

GND’, excessive current flows into the D-GND to destory this IC. To prevent such destru ctio n, pa y attention to the followings on using.

Single power supply : Short-circuit the D-GND and GND directory on the board mounting this IC. Split power supply : Avoid reverse conditions of D-GND and V

transient-time of power ON/OFF.

’ or ‘D-GND is lower than

CC

or VEE voltage, including

CC

Reference Voltage

For the single supply operation these devices provide the reference voltage of half the supply voltage that is the signal grounds. As the peculiarity of these devices, the capacitor for the ripple filter is very small about 1/100 compared with their usual value. The Reference voltage are provided for the left channel and the right channel separately. The block diagram is shown as figure 1.

Rev.1, Nov. 1992, page 11 of 66

HA12173 Series

22

47

V

(L)

V

CC

+

REF

RIPGND 49 50 40

+

C22

–

+

–

+

–

52

1 Fµ

L channel reference

Music sensor reference

R channel reference

V

(R)

REF

MS V52

REF

Figure 1 The Block Diagram of Reference Voltage Supply

Operating Mode Control

HA12173 series provide fully electronic switching circuits. And each operating mode control are controlled by parallel data (DC voltage).

Table 2 Threshold Voltage (V

Pin No. Low High Unit Test condition

13, 14, 15, 16, 17, 18, 19

–0.2 to 1.5 3.5 to 5.3 V

)

TH

Input Pin Measure

22 k

V

Rev.1, Nov. 1992, page 12 of 66

HA12173 Series

Table 3 Switching Truth Table

Pin No. Low High

13 B - NR C - NR 14 NR - OFF NR - ON 15 PB REC 16 TAPE RADIO 17 120 µ (NORMAL) 70 µ (METAL or CHROME) 18 FORWARD REVERSE 19 SER (FF or REV) REP (NORMAL SPEED) Notes: 1. Voltages shown above are determined by internal circuits of LSI when take pin 20 (DGND pin) as

reference pin. On split supply use, same V pin.

This means that it can be controlled directly by microprocessor. But power supply should be over ±5 V, notwithstanding the prescription of table 1.

2. Each pins are on pulled down with 100 kΩ internal resistor. Therefore, it will be low-level when each pins are open.

3. Over shoot level and under shoot level of input signal must be the standardized (High: 5.3 V, Low: –0.2 V)

4. When connecting microcomputer or Logic-IC with HA12173 series directly, there is apprehension of rush-current under some transition timming of raising voltage or falling voltage at V

On using, connect protective resistors of 10 to 22 kΩ to all the control pins. It is shown is test circuit on this data sheet. And pins fixed to low level should be preferably open.

5. Pay attention not to make digital GND voltage lower than GND voltage.

can be offered by connecting DGND pin to GND

TH

ON/OFF.

CC

Rev.1, Nov. 1992, page 13 of 66

HA12173 Series

Input Block Diagram and Lev e l Diagram

R34

5.1 k R35

5.1 k

EQ OUT

C24

0.1µ

HA12173: 300 mVrms (–8.2 dBs) HA12174: 450 mVrms (–4.7 dBs) HA12175: 580 mVrms (–2.5 dBs) HA12177: 775 mVrms (0.0 dBs)

RAITAI PBOUT

R36

R39 180

R38 330 k

12 k

R37 18 k

C25

0.01µ

Unit R:

C: F

Ω

EQ OUT-M

EQ AMP

NFI

R

IN

V

REF

F

IN

Figure 2 Input Block Diagram

Adjustment of Playback Dolby Level

30 mVrms (–28.2 dBs)

+–

0.6 mVrms (–62.2 dBs)

42.4 mVrms (–25.2 dBs)

INPUT AMP

+

NR circuit

–

The each level shown above is typical value when offering PBOUT level to PBOUT pin. (EQ AMP Gv = 40 dB f = 1 kHz)

RECOUT 300 mVrms

(–8.2 dBs)

After replace R34 and R35 with a half-fix volume of 10 kΩ, adjust RECOUT level to be Dolby level with playback mode.

Note on Connecting with Tape Head to IC

This IC has no internal resistor to give the DC bias current to equalizer amp., therefore the DC bias current will give through the head. This IC provides the Vref buffer output pin for Rch and Lch separ ately (has two Vref terminal). In case of use that the Rch and Lch reference of head are connected commonly, please use one of Vref terminals of IC (47 pin or 52 pin) for head reference. If both 47 pin and 52 pin of IC are connected, rush current give the great damage to IC. The application circuit is shown in figure 3.

Rev.1, Nov. 1992, page 14 of 66

43

44

HA12173 Series

45

46

47

48

49

50

51

52

53

54

55

V (L)

REF

GND

V (R)

REF

–

R/F

– +

+

56

Figure 3 Application Circuit

Rev.1, Nov. 1992, page 15 of 66

HA12173 Series

The Sensitivity Adjustment o f a Music Sensor

Adjusting MS AMP. gain by external resistor, the sensitivity of music sensor can set up.

TAI (L)

X1

–6 dB

X1

TAI (R)

R28 R27

R26 R25

C28 4700 p

MS V

REF

L·R signal addition circuit

+

–

26 dB

LPF

25 kHz MS AMP

C14

0.01 µ

FFI NOI MA

OUT

+

–

V

CC

R24 330 k

MSI MS

DET

100 k

+

C13

0.33 µ

Unit R:

MS OUT

D GND

Ω

C: F

DV

CC

I

R

L

Microcomputer

D GND

L

Rev.1, Nov. 1992, page 16 of 66

Figure 4 Music Sensor Block Diagram

HA12173 Series

Gv1

Gv

[dB]

Gv2

1. Normal mode

Gv1 = 20log 1+

f1=

⋅π ⋅

2

R27



 

R28

1

C14⋅100 k

f

1

Figure 5 Frequency Response



 [dB] 

[Hz], f 2=25 k[Hz]

f

2

Normal speed

f

3

FF or REV

1 k10010 10 k 25 k 100 k

f [Hz]

f

4

2. FF or REW mode R25

Gv2 = 20log 1+

=

f3

2⋅π⋅C28⋅R26



 

1



 [dB] 

R26

[Hz],f4=25k [Hz]

A standard level of TAI pin is 30 mVrms and the gain for TAI to MS AMP input is 10, therefore, the other channel sensitivity of music sensor (S) is computed by the formula mentioned below.

S=20 log

C 30

⋅

10⋅ A

[dB]

1

A = MS AMP. gain (B dB) S = –7.3–B [dB] C = 130 mVrms (typ.) S is 6 dB up in case of the both channels. C = The sensing level of music sensor

Rev.1, Nov. 1992, page 17 of 66

HA12173 Series

Music Sensor Output (MS OUT)

As for the internal circuit of music sensor block, music sensor out pin is connected to the collector of NPN Type directly, Output level will be “high” when sensing no sign a l. And outp ut level will be “low” when sensing signal.

Connection with microcomputer, design I

– MSOUTLo*

DV

I

L

CC

=

R

L

at 1 mA typ.

L

* MSOUTLo: Sensing signal (about 1 V)

Notes: 1. Supply voltage of MS OUT pin must be less than V

2. MS V

pin and VCC pin are required the same voltage.

CC

voltage.

CC

The Tolerances of External Components for Dolby NR-block

For adequate Dolby NR tracking response, take external components shown below.

C21 2200 p

SS1

(L)

±5% C20

2200 p ±5%

SS2

(L)

R31 560 ±2%

CCR

(L)

C18 2200 p ±5%

HLS

DET (L)

C17

0.1 ±10%

µ

R32 22 k ±2%

37 36 35 34 33

PB OUT

(L)

32

LLS

DET (L)

C16

0.1

µ

±10%

HA12173 Series (PB 1 Chip)

3

PB OUT

(R)

67 910

R11 18 k ±2%

R12 22 k ±2%

SS1

(R)

C7 2200 p ±5%

C6 2200 p ±5%

SS2

(R)

8

R13 560 ±2%

CCR

(R)

C9 2200 p ±5%

DET(R)BIAS

HLS

C10

0.1 ±10%

DET(R)

µ

LLS

11

C11

0.1

µ

±10%

Unit R:

C: F

Figure 6 Tolerances of External Components

PB Equalizer for Double Speed

PB equalizer can be design for double speed by using external components shown in figure 7. Application data is shown in figure 8.

Rev.1, Nov. 1992, page 18 of 66

Ω

HA12173 Series

4.7

R38 330 k

R39 180

R35

5.1 k

µ

0.015

µ

+

R36 12 k

R37 18 k

C25

0.01

No

µ

R

Do

EQ OUT

EQ OUT-M

EQ AMP.

NFI

RIN

V

REF

FIN

– +

22 k VR1

µ

0.1 +

TAI RAI PBOUT

INPUT AMP.

No : Normal speed Do : Double speed

Please ajust RECOUT level to

*

be Dolby level with volume of VR 1.

+

–

NR circuit

RECOUT

Unit

R: C: F

Ω

Figure 7 Application Circuit for Double Speed

60

50

40

V

G (dB)

30

20

10

20 100 1 k 10 k 100 k

Frequency (Hz)

Figure 8 Application data

µ

120

70

R = 2.7 k R = 2.2 k R = 1.8 k R = 1.3 k

OUTPUT = TAIpin

*

Normal speed

µ

Double speed

Rev.1, Nov. 1992, page 19 of 66

HA12173 Series

Circuit For Split Supply

HA12173

EE

5 V

R29

R30

EQOUT (L)

10 k

SW22

PBOUT (L)

ON

RECOUT (L)

DC VM1

SW21

SW24

SW23

EQOUT(L)

OFF

LR

PBOUT(L)

RAI (L)

DC SOURCE1

R27

330 k

RECOUT(L)

R28

18 k

C21

2200 p

R33

5.1 k

EQIR (L)

EQIF(L)

SW25

0.33 µ

C17

+

C16

0.1 µ

560

R37

C30

100 µ

0.1 µ

18 k

EE

(V )

DC SOURCE2

CC

V

MS

V

MS

DET

MSI

MA

OUT

MS

GND

FFI NOI

MS

VREF

REC

OUT

LLS

DET

HLS

DET

(L)

CCR

(L)

SS2

(L)

SS1

PB

OUT

N.C.

(L)

RAI

RIP

(L)

TAI

N.C.

EQ

OUT

EQ

OUT-M (L)

NFI

(L)

RIN

(L)

VREF

(L)

FIN

49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 3334 32 31 30 29 28 27 26 25 24 23 22

GND

Note : In case of using digital GND

terminal referring to V level,

separate digital GND and

analog GND and connect

digital GND terminal to V .

MS

2120

OUT

CC

D

GND

GV

MS

/70µ

120µ

TAPE/

RADIO

/PB

REC

ON/

OFF

(L)

(R)

REC

OUT

(L)

(R)

LLS

DET

(L)

(R)

HLS

DET

(R)

CCR

(R)

SS2

(R)

SSI

(L)

PB

(R)

OUT

(R)

RAI

HA12173/4/5/7 (PB 1 Chip)

(R)

TAI

F/R

C/B

N.C.

BIAS

R22

22 k

1918

R21

22 k

R20

22 k

17

R19

22 k

+

16

R18

22 k

C33

22 µ

1514131211109876543215655545352

R17

22 k

C32

22 µ +

R16

22 k

+

C31

22 µ

C11

0.1 µ

C10

0.1 µ

R13

560

R12

22 k

C8

C4

N.C.

(L)

(R)

EQ

OUT

(L)

EQ

OUT-M

NFI

RIN

VREF

FIN

R6

(R)

18 k

C3

0.01 µ

(R)

C2

(R)

GND

22 µ

51

50

D GND

DC SOURCE2

DC SOURCE3

L

SW18

PBOUT(R)

EQOUT(R)

AC VM1 AUDIO SG

R

RECOUT(R)

PBOUT(R)

MSOUT

R23

3.9 k

SW1SW2

SW3SW4

SW5SW6

PB REC 120 µ 70 µ SER REP

OFF ON TAP RAD FOR REV

SW7

C B

+

C12

2.2 µ

C9

C7

2200 p

+

2.2 µ C5

0.47 µ

+

R11

18 k

R9

5.1 k

0.1 µ R8

5.1 k

R7

12 k

R5

330 k

R3

180

R2

680

++

R1

680

C1

22 µ

EQIF(R)

SW16

LR

SW13 SW12 SW11 SW10 SW9 SW8

SW14

2200 p

C6

2200 p

EQIR (R)

RAI (R)

SW15

RECOUT(R)

R10

5.1 k

ON OFF

SW17

SW19 SW20

EQOUT(R)

R15

10 k

R14

10 k

AC VM2

ANALYZER

DISTORTION

OSCILLO SCOPE

NOISE METER

Ω

Unit R:

C: F

Noise meter

with CCIR/ARM filter

and DIN-AUDIO filter

CC

(V )

A GND

C29

100 µ

+

C13

R24

330 k

C14

0.01 µ

R25

47 k

C28

4700 p

R26

33 k

+

C15

2.2 µ

C18

2200 p

R31

C20

2200 p

R32

22 k

+

C19

2.2 µ

+

C23

0.47 µ

R34

5.1 k

C24

0.1 µ

R35

5.1 k

R36

12 k

R38

330 k

R39

180

C25

0.01 µ

R40

680

+

C26

22 µ

R41

680

C27

22 µ

+

Rev.1, Nov. 1992, page 20 of 66