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10

Procedure :
1.

Connect oscilloscpe to test point TP (TE1) and TP (VC) on
BD BOARD.

2.

Turn Power switch on.

3.

Put disc (PATD-012) in to play the number five track.

4.

Press the  X  (Pause) button. (Becomes the 1 track jump mode)

5.

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 ± 22%

Procedure :
1.

Connect the test point TP1 (ADJ) on DISPLAY BOARD to
the ground with a lead wire on main board.

2.

Connect oscilloscpe to test point TP (TE1) and TP (VC) on
BD BOARD.

3.

Turn the Power switch on to set the ADJ mode.

4.

Put disc (PATD-012) in to play the number five track.

5.

Press the [TIME/TEXT] button. (The tracking servo are turned
OFF.)

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 ± 22%

Traverse waveform

±

Note:
1.

CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.

2.

Use PATD-012 disc (3-702-101-01) unless otherwise indicated.

3.

Use an oscilloscope with more than 10M

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.

±

±

Procedure :
1.

Connect oscilloscope to test point TP (RF AC) and TP (VC) on
BD BOARD.

2.

Connect the test point TP1 (ADJ) on DISPLAY BOARD to the
ground with a lead wire.

3.

Turn Power switch on.

4.

Put disc (PATD-012) in to play the number five track.

5.

Press the [CLEAR] buton and select the RFCK function.

6.

Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.

Note:
A clear RF signal waveform means that the shape “

◊

” can be clearly

distinguished at the center of the waveform.

       RF signal waveform

     1 track jump waveform

7.

Press the [TIME/TEXT] button. (The tracking servo are 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 TP1 (ADJ) connected in step 1.

11

[ BD BOARD ] – Side B –

[ DISPLAY BOARD ] – Conductor side –

TP2
AFADJ

TP1
ADJ

GND

S531

l AMS L

12

KEY board

DISPLAY board

HEADPHONE board

MAIN board 

BD board

LOADING board

POWER SW board

13

13

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.

•

f

: internal component.

•

C

: panel designation.

•

A

: B+ Line.

•

B

: B– Line.

• Voltages and waveforms are dc with respect to ground

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

) : PLAY

• 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.

• Y

: parts extracted from the conductor side.

•

x

: parts mounted on the conductor side.

•

a

: 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.

Note: The components identified by mark 

0

 or dotted line

with mark 

0

 are critical for safety.

Replace only with part number specified.

11

(21)

S272

LOAD

IN

S271

LOAD

OUT

CN151

1

5

M151

LOADING

MOTOR

M

• See page 12 for Circuit Board Location.