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IC401

CN402

TP3 (JW41: ADJ)

TP2 (JW40: AF ADJ)

– 9 –

6.

Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 7%

Traverse waveform

7.

Press the “8” button. (The tracking servo is  turned ON.)
Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 6.

Traverse waveform

8.

Disconnect the lead wire of TP3 (ADJ) connected in step 1.

[ BD BOARD ] — Side A —

[ MAIN BOARD ] — Component Side —

0V

level : 500 

±

 100 mVp-p

A (DC voltage)

Center of the waveform

B

0V

C (DC 
voltage)

Tracking servo
        OFF

Tracking servo
        ON

(VC)

(RF)

(FOK)

(TEO) (FEO)

IC101

– 10 –

MAIN board

DISPLAY board

KEY board

LOADING board

POWER SW board

BD board

Note:
• All capacitors are in µF unless otherwise noted.  pF: µµF

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.

•

¢

: internal component.

•

C

: panel designation.

•

U

: B+ Line.

•

V

: B– Line.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.
no mark : STOP
(

) : PLAY

∗

: Impossible to measure

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

Ω

).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.

• Circled numbers refer to waveforms.
• Signal path.

J

: CD

c

: digital out

• X

: parts extracted from the component side.

•

®

: Through hole.

• b

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)

pattern face are indicated.

Parts face side:

Parts on the parts face side seen from the

(Side A)

parts face are indicated.

C

These are omitted

E

B

Q

C

These are omitted

E

B

Note: The components identified by mark 

!

 or dotted line

with mark 

!

 are critical for safety.

Replace only with part number specified.

• Refer to page 10 for Circuit Boards Location.

— 11 —

— 12 —

(Page 15)

16

IC101

C-1

IC102

B-1

IC103

C-2

Q101

C-6

— 13 —

— 14 —

(Page 18)

16

BA/F-NP

• Refer to page 23 for IC Pin Functions.
• Refer to page 29 for IC Block Diagrams.

500mV/DIV, 500nsec/DIV

1

 

IC101 

#£

 RFO

5

 

IC103 

^º

 XPCK

6

 

IC103 

^™

 RFCK

7

 

IC103 

&¢

 WFCK

8

 

IC103 

*ª

 XTAI

2

 

IC101 

2

 FEI

3

 

IC101 

$¶

 TEI

4

 

IC103 

@¶

 MDP

1.3Vp-p

200mV/DIV, 1

µ

sec/DIV

0.5Vp-p

50mV/DIV, 1msec/DIV

0.2Vp-p

7.8

µ

sec

2.5Vp-p

230

µ

sec

5Vp-p

135

µ

sec

5Vp-p

16.9344MHz

2.6Vp-p

135

µ

sec

5Vp-p

1

2

A

B

C

D

E

F

G

H

I

J

K

3

4

5

6

7

8

9

10

11

12

13

14

— 15 —

— 16 —

11

(21)

S152

LOAD

IN

S151

LOAD

OUT

CN151

1

5

M151

LOADING

MOTOR

M

D401

G-4

D402

G-3

D403

C-5

D404

G-4

D701

G-7

D702

F-7

D703

E-8

D704

E-7

D705

E-8

D706

D-8

D901

E-10

D902

E-10

D903

E-10

D904

E-10

D905

E-10

D906

D-10

D910

D-9

IC301

C-10

IC302

C-10

IC303

B-13

IC401

B-5

IC701

E-8

Q302

C-11

Q303

C-12

Q304

D-10

Q352

B-11

Q353

B-12

Q354

B-8

Q401

G-4

Q402

G-5

Q701

D-8

• Refer to page 10 for Circuit Boards Location.