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13

+
–

BD83S board

TP (RFACI)
TP (VC)

oscilloscope 

(DC range) 

1. Connect oscilloscope to TP (RFACI) and TP (VC) on the

BD83S board.

2. Press the

I/

1 button to turn the power ON, and press

the Z (CD) button to open the CD disc tray.

3. Set disc (YEDS-18) on the tray and press the

CD

 u button

to playback.

4. Confirm that oscilloscope waveform is as shown in the figure

below. (eye pattern)
A good eye pattern means that the diamond shape (

◊) in the

center of the waveform can be clearly distinguished.

±

1.

CD Block is basically constructed to operate without adjustment.

2.

Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3.

Use an oscilloscope with more than 10 M

Ω impedance.

4.

Clean the object lens by an applicator with neutral detergent when the

signal level is low than specified value with the following checks.

5.

Check the focus bias check when optical pick-up block is replaced.

Adjustment Location: Record/Playback/Erase Head

14

0 dB=1 

µ

V

Setting:
FUNCTION: TUNER
TUNER/BAND button: AM

Setting:
FUNCTION: TUNER
TUNER/BAND button: FM

•

Repeat the procedures in each adjustment several times.

AM RF signal 

generator

30% amplitude 

modulation by 

400 Hz signal

Output level: 54 dBuV

60 cm

set

loop antenna A loop antenna B

+
–

level meter

32 

Ω

JACK board

PHONES jack (J102)

FM RF signal

generator

75kHz frequency
deviation by 1K Hz
signal
Output level: as low as possible
                         (8dBuV)

+
–

level meter

set

32 

Ω

0.01 

µ

F

JACK board
PHONES jack (J102)

MAIN board

ANTENNA

CNP802 pin 

1

MAIN board

ANTENNA

CNP802 pin 

2

digital voltmeter

100 k

Ω

MAIN board

TP (TUNER VT)

Adjustment Part

Frequency Display

Reading on Digital Voltmeter

L852

530 kHz

1.5 

±

 0.1 V

Confirmation

1,710 kHz

8 

±

 0.5 V

Adjustment Part

Frequency Display

Reading on Digital Voltmeter

L852

531 kHz

1.5 

±

 0.1 V

Confirmation

1,602 kHz

7.2 

±

 0.5 V

Adjust for a maximum reading on level meter

L851

530 kHz

Adjust for a maximum reading on level meter

L851

531 kHz

Adjustment Part

Frequency Display

Reading on Digital Voltmeter

L805

87.5 kHz

1.75 

±

 0.1 V

Confirmation

108 kHz

6.2 

±

 0.5 V

Adjust for a maximum reading on level meter

L804

98 MHz

Adjustment Location: MAIN board (See page 15).

Setting:
FUNCTION: TUNER
TUNER/BAND button: FM

FM RF signal

generator

Carrier frequency: 98MHz
Modulation:
deviation by FM 75 kHz
Output level: 60 dBuV

+
–

level meter

MAIN board
TP(TUNER-GND)

MAIN board
IC801 pin 

qs

(TUNER OUT L-ch)

set

MAIN board
ANTENNA
CNP802 pin 

2

MAIN board
ANTENNA
CNP802 pin 

1

1. Tune the set to 98 MHz.
2. Adjust L806 so that modulation distortion may become the

best in the vicinity of the maximum value where the tuner out
level becomes –15dBuV or more.

15

AM Tracking
Adjustment

L851

L852

FM Tracking
Adjustment

FM Detector
Adjustment

   FM Frequency
Coverage Adjustment

L805

L806

L804

AM Frequency
Coverage Adjustment

TUNER-VT

TUNER-GND

TP(TUNER-VT)

TP(TUNER-GND)

IC801

1

1

12

18

19

36

3

ANTENNA

CNP802

IC801 pin 

qs

(TUNER OUT L-ch)

16

Note on Schematic Diagram:
• All capacitors are in 

µ

F unless otherwise noted.  (p: pF)

50 WV or less are not indicated except for electrolytics and
tantalums.

• All resistors are in 

Ω

  and 

1

/

4

 

W or less unless otherwise

specified.

•         

f

: internal component.

•

2

: nonflammable resistor.

•

5

: fusible resistor.

•

C

: panel designation.

•

H

: adjustment for repair.

•

A

: B+ Line.

•

B

: B– Line.

• Voltages are taken with a VOM (Input impedance 10 M

Ω

).

Voltage variations may be noted due to normal production
tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production
tolerances.
– BD Section –
No mark: CD PLAY
– Other Section –
No mark: FM
(

): TAPE PLAY

〈

〉

: TAPE REC

[

]: CD STOP

• Circled numbers refer to waveforms.

• Signal path.

F

: TUNER (FM)

f

: TUNER (AM)

J

: CD

d

: AUX

E

: PB (TAPE)

a

: REC (TAPE)

• Abbreviation

AUS

: Australian model

CET

: East Europian and Russian models

CND

: Canadian model

E3

: 240V AC area in E model

KR

: Korean model

SP

: Singapore model

Note on Printed Wiring Boards:
•

X

: parts extracted from the component side.

•

Y

: parts extracted from the conductor side.

•        

f

: internal component.

•

: Pattern from the side which enables seeing.

• Indication of transistor.

C

B

These are omitted.

E

Q

B

These are omitted.

C

E

Q

The components identi-
fied by mark 

0

  or dot-

ted line with mark 

0

 are

critical for safety.
Replace only with part
number specified.

Les composants identifiés
par une marque 

0

 sont cri-

tiques pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.

Caution:
Pattern face side:  Parts on the pattern face side seen from
(Side B)                 the pattern face are indicated.
Parts face side:     Parts on the parts face side seen from
(Side A)                 the parts face are indicated.