SCD-1, SCD-777ES (serv.man3) - Sony Audio Service Manual (repair manual). Page 12

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6. Press the H button.
7. Press the - button and 7 button, and the - button and 5

button on the remote commander successively to turn off the
tracking servo.

8. Check that the waveform on oscilloscope is within the level

A

 and B specifications.

9. After checking, press the 

x

 button.

10. Repeat steps 3 through 9 respective discs.
11. Press the 

!

 button to turn the power off.

Disc

A

B

SATD-S2

SATD-S3

1.3 to 2.4 Vp-p

- 0.1 to +0.1 V

TCD-784

bbb

              CD1

             

Discchk

XX

XX

Disc type (refer to Disc check list (page 11))

Procedure:
1. Connect an oscilloscope to the TP516(TE) and TP501(VC) on

the MAIN board.

2. Set the Adjustment-1 Mode. (See 5-2. Adjustment-1 Mode in

SECTION 5 (page 11))

3. Set a disc (SATD-S2, SATD-S3, or TCD-784).
4. Press the 3 button and - button on the remote commander

to make the disc type checked.

If the disc check was made in the Adjustment-1 Mode, pressing
another button immediately after pressing the 3 and - buttons
on the remote commander could cause the microcomputer to run
out of control, thus requiring extreme care.

5. Confirm that the disc was checked.

1. When the following parts were replaced, adjust and check the

items marked with a in the given order.

Optical

IC on RF or

Spindle

Adjustment & check

pick-up

MAIN board

motor (M7)

1. Optical Pick-up

    Height Adjustment

a

×

a

2. Overall Adjustment

a

a

×

3. Traverse Check

a

×

×

4. S Curve Check

a

×

×

5. RF Level Check

a

×

×

6. CLV Jitter Check

×

×

a

2. Adjustment jigs

The following jigs are exclusively used for electrical adjust-
ment and check of this set. Do not use them for other applica-
tions.

(1) Disc

Model

Type

*

1

Category

Applications

SATD-S1

SL

8cm disc

Optical pic-kup H adj.

SATD-S2

SL

Reference disc

Overall adj. and check

SATD-S3

DL

Reference disc

Overall adj. and check

SATD-S4

SL

Reference disc

Audio characteristic check

TCD-784

CD

Reference disc

Overall adj. and check

*1 SL: Single Layer

DL: Dual Layer

(2) Remote commander: Assessory for set or RM-D950 (Part No.

1-473-944-1)

(3) Extension cable (Part No. J-2501-164-A) 2 pcs.

3. In making adjustment and check, set the CD1/CD2 switch on

the remote commander to CD1.

4. The impedance of oscilloscope should be more than 10M .

MAIN board

TP516 (TE)

TP501 (VC)

+
–

oscilloscope

(auto or normal mode)

A

B

VC

Center fo the waveform

Traverse waveform

Parts