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– 17 –

[SOURCE]

 button

: FM

FREQUENCY SELECT switch : FM 200 k

Procedure:
1. Tuner the 97.9 MHz.
2. The then output level is supposing that 0 dB.
3. Adjust with the volume RV3 on TU11 so that the output level

is –32 ± 2 dB then signal generator input set to –20 dB.

Adjustment Location: See page 18.

[SOURCE]

 button

: FM

FREQUENCY SELECT switch (E model): FM 200 k

L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.

Specification: Separation more than 28 dB

Adjustment Location: See page 18.

FM Stereo

Level meter

Level meter

signal generator

connection

reading (dB)

output channel

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV4 on TU11

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU11

for minimum reading.

FM RF signal

generator

Carrier frequency : 97.9 MHz
Output level

: 60 dB (1 mV)

Mode

: stereo

Modulation

: 1 kHz, 75 kHz deviation (100%)

0.01 

µ

F

set

antenna jack (CN11)

+
–

speaker out terminal

level meter

4 

Ω

FM RF signal

generator

Carrier frequency : 97.9 MHz
Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main : 1 kHz, 33.75 kHz deviation (45%)
  sub : 1 kHz, 33.75 kHz deviation (45%)

:

 19 kHz pilot: 7.5 kHz deviation (10%)

0.01 

µ

F

set

antenna jack (CN11)

+
–

speaker out terminal

level meter

4 

Ω

[SOURCE]

 

→

 

[MODE]

 button

: AM (US model)
: MW (E model)

FREQUENCY SELECT switch (E model): MW 10 k

Procedure:
1. Set to the test mode. (See page 15.)
2. Push the 

[SOURCE]

 button and set to FM.

3. Push the 

[MODE]

 button and set to AM (US model) or MW (E

model).

Display

4. Adjust with the volume RV1 on TU11 so that the “AM” (US

model) or “MW” (E model) indication turns to “AM0” (US
model) or “MW0” (E model) indication on the display win-
dow. But, in case of already indicated “AM0” (US model) or
“MW0” (E model), turn the RV1 so that put out light “0” indi-
cation and adjustment.

Display

*1: E model has the “MW” displayed.

Adjustment Location: See page 18.

AM RF signal

generator

Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
Output level

: 33 dB (44.7 

µ

V)

(50 

Ω

)

set

AM dummy antenna

30 

Ω

15 pF

65 pF

antenna jack (CN11)

SHUF1

*1

SHUF1

*1

– 18 –

– SET  UPPER  VIEW –

– SET  BOTTOM  VIEW –

TU11

Tape Speed Adjustment

RV1 AM (MW) Auto Scan/Stop Level Adjustment

RV3 FM Noise Focus Adjustment (E Model)

RV4 FM Stereo Separation Adjustment

RV2 FM Auto Scan/Stop Level Adjustment

RV261

(R-CH)

RV251
(L-CH)

Dolby Level

Adjustment

R-CH

L-CH

TP (DOLBY)
Dolby Level
Adjustment

– 27 –

5 Vp-p

200 ns

5.4 Vp-p

31 

µ

s

3.7 Vp-p

140 ns

1

IC91 

@º

 (X0)

2

IC501 

&™

 (XT_OUT)

3

IC501 

^ª

 (X_OUT)

– 33 –

PHASE

DET

PRESCALER

MAIN

COUNT

IF COUNT

CTL

20BIT COUNT

SHIFT REGISTER LATCH

REFERENCE

DIVIDER

I/O

CTL

1

2

4

5

6

7

9

10

20

18

17

16

15

14

13

12
11

19

XIN

CE

CK

DA

CD

P0

P1

P3

XOUT

VSS

PD

VDD

FMIN

AMIN

P2

IFIN

SD
P4

1

2

3

4

5

6

7

8

9

10

GND

IN1

VCC

IN2

GND

N.C.

OUT2

VS

OUT1

N.C.

CONTROL LOGIC

+
–

+

–

+

–

+

–

+ –

1

2

3

4

5

6

7

8 9 10

20

19

18

17

16

15

14

13

12

11

21

22

23

26

27

28

29

30

31

32

33

34

37

38

39

40

24

25

PBFB2

PBRIN2

PBREF2

PBFIN2

35

36

PBGND

VCT

PBFIN1

PBREF1

PBRIN1

PBFB1

PBEQ2

PBOUT2

VCC

TAPEIN2

AUXIN2

MSLPF

LINEOUT2

TCH2

NC

PLAY

FF

MSTC

DGND

MSOUT

NC

NRSW

INSW

TAPESW

MSMODE

DRSW

MSSW

NC

TCH1

LINEOUT1

DIREF

AUXIN1

TAPEIN1

PBEQ1

PBOUT1

GND

F2

120

µ

/

70

µ

X1

X1

VCT

+

F1

120

µ

/

70

µ

NR

OFF/B

F3

LPF

VCC

DETECT

MS ON/

OFF

NR

MODE

FWD/RVS

TAPE EQ

TAPE/AUX

NR BIAS

NR

MS

MODE

OFF/B

T2

T1