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71

This set performs automatic adjustment for each disc, and there-
fore the set need not be adjusted when parts are replaced, but it
requires checking following the description in this section, 6-1.
IC AND FLUORESCENT DISPLAY TUBE CHECK and 6-2.
AUTO CHECK.
For the check, the test mode is used. Wrong setting causes a trouble,
thus requiring extreme care.

The BU electrical adjustment mode is used to check the S curve
waveform, traverse waveform and RF waveform. After a disc is
placed on the tray, each time the 

[        AMS        ]

 dial is pressed,

the check mode is switched in order for S curve waveformt
traverse waveformtRF waveform.

Setting Method:
After setting the test mode, rotate the 

[        AMS        ]

 dial to select

“9C BU DENCHO” and press the 

[        AMS        ]

 dial to enter.

“BU MEASURE” will be displayed if the BU electrical adjust-
ment mode becomes active.

Checking Method:
1. After setting the BU electrical adjustment, place the test disc

(PATD-012 or SATD-S5 or SATD-S4) on the tray and close
the tray, then press the 

[        AMS        ]

 dial.

2. At the completion of disc type check, “CD DETECT” will be

displayed (for PATD-012 or YEDS-18).

 For the  SATD-S5 or SATD-S4, “SACD DETECT“ is displayed.

3. Press again the 

[        AMS        ]

 dial, and the S curve waveform

check mode will become active and “S-J1 MODE” will be
displayed.

4. Connect an oscilloscope to the TP506 (FE) and TP504 (AVC)

on the MAIN board.

5. Check that the level A and B of waveform on the oscilloscope

satisfy the specification.

Disc

A

B

SATD-S5 or

SATD-S4

PATD-012 or

0.7 to 1.7 Vp-p

- 0.1 to +0.1V

YEDS-18

For easier observation of this waveform, extend the sweep time
and raise the brightness.

MAIN board

TP506 (FE)

TP504 (AVC)

+
–

oscilloscope

A

B

S curve waveform

VC

Checking Method:
1. Under the condition of S curve waveform check mode in step

5, press the 

[        AMS        ]

 dial.

2. After “WAIT” is displayed, the traverse waveform check mode

will become active and “TRAVERSE MODE” will be dis-
played.

3. Connect an oscilloscope to the TP513 (TE) and TP504 (AVC)

on the MAIN board.

4. Check that the level A and B of waveform on the oscillo-

scope satisfy the specification.

Disc

A

B

SATD-S5 or

SATD-S4

PATD-012 or

0.9 to 1.5 Vp-p

- 0.1 to +0.1V

YEDS-18

MAIN board

TP513 (TE)

TP504 (AVC)

+
–

oscilloscope

A

B

VC

Center fo the waveform

Traverse waveform

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72

Checking Method:
1. Under the condition of traverse waveform check mode in step

4, press the 

[        AMS        ]

 dial.

2. Connect an oscilloscope to the TP703 (RFAC) and TP704

(AGND) on the MAIN board.

3. After “WAIT” is displayed, the RF waveform check mode will

become active and “PLAY 5th” will be displayed, and the 5th
music on the disc will be played.

4. Check that the RF waveform is clear and the level satisfies the

specification.

5. Press the 

[        AMS        ]

 dial, and “GAISHU” will be displayed

and the outward track of the disc will be played.

6. Check that the RF waveform is clear and the level satisfies the

specification.

7. Press the 

[        AMS        ]

 dial, and “NAISHU” will be displayed

and the inward track of the disc will be played.

8. Check that the RF waveform is clear and the level satisfies the

specification.

9. After checking, press the 

[        AMS        ]

 dial, and the test is

over when “BU MEASURE” is displayed.

10. Press the 

[OPEN/CLOSE]

 button to open the tray, and remove

the test disc.

11. Using each type of disc, repeat from step 1 of S curve wave-

form check up to step 10 of RF level check.

12. When the check is over, press the 

[POWER]

 button to turn the

power off.

 Take care not to leave the test disc in the set.

Disc

A

SATD-S5 or

SATD-S4

PATD-012 or

0.9 to 1.5 Vp-p

YEDS-18

 Clear RF waveform refers to the waveform where 

◊ shapes should

be distinctively observed in the center.

MAIN board

TP703 (RFAC)

TP704 (AGND)

+
–

oscilloscope

VOLT/DIV: 200 mV
TIME/DIV: 500 ns

RF signal waveform

A

Checking Method:
1. Set the test mode.
2. Connect an oscilloscope to the TP516 (RFCK) (CH1), TP517

(WFCK) (CH2) and TP808 (DG) (GND) on the MAIN board.

3. Place the test disc PATD-012 or YEDS-18 on the tray, and

close the tray.

4. Rotate the 

[        AMS        ]

 dial to select “61 DISC DETECT”,

and press the 

[        AMS        ]

 dial to enter. Then, the disc type

will be judged.

5. Check that the disc type has been judged.

(For the PATD-012, “DSKMOD CD” will be displayed. Refer
to the test mode, DISC DETECT command (page 55))

6. Rotate the 

[        AMS        ]

 dial to select “86 ALL SRV ON”,

and press the 

[        AMS        ]

 dial. Then, the disc will rotate,

automatic adjustment will be carried out, and all servos will
be turned on.

7. Rotate the 

[        AMS        ]

 dial to select “07 DSP MON3”, and

press the 

[        AMS        ]

 dial to enter.

8. Check that the value A of waveform on the oscilloscope sat-

isfies the specification.

9. Rotate the 

[        AMS        ]

 dial to select “19 ALL SRV OFF”,

and press the 

[        AMS        ]

 dial. Then, all servos will be

turned off and the disc rotation will stop.

10. Press the 

[OPEN/CLOSE]

 button to open the tray, and remove

the test disc.

11. Press the 

[POWER]

 button to turn the power off.

 Take care not to leave the test disc in the set.

Disc

A

PATD-012 or

50 

µsec or less

YEDS-18

MAIN board

TP516 (RFCK)

TP517(WFCK)

TP808 (DG)

+

+

–

oscilloscope

(CH2)

(CH1)

A

CLV jitter waveform

l

L

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73

TP513

(TE)

TP504

(AVC)

TP506

(FE)

TP517

(WFCK)

TP516

(RFCK)

TP808

(DG)

IC701

IC801

IC509

TP703

(RFAC)

TP704

(AGND)

74

NOTE:

•

-XX, -X mean standardized parts, so they may
have some differences from the original one.

•

Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.

•

The mechanical parts with no reference number
in the exploded views are not supplied.

•

Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.

The components identified by mark 

0

 or

dotted line with mark 

0

 are critical for safety.

Replace only with part number specified.

Les composants identifiés par une marque

0

 sont critiques pour la sécurité.

Ne les remplacer que par une pièce portant
le numéro spécifié.

Ref. No.

Part No.

Description

Remarks

1

4-230-713-01 PANEL, LOADING

2

4-227-843-01 SCREW (TP), FLAT HEAD

3

4-230-684-01 CASE

4

4-929-074-01 SCREW (3X8)