Sony Scd-1 Service Manual

11
5-2. ADJUSTMENT-1 MODE
This mode is a special mode used to perform overall adjustment,
optical pick-up height adjustment, and service check.
Note:
1. Wrong setting method can cause a trouble.
2. Never operate the set with the loading panel mounted, which otherwise
causes a trouble.
Setting Method:
1. With the power turned off, press the  
!  button while pressing
the [DIGITAL OUT] button and 
l button.
2. Display of ÒbbbÓ implies that the set is now in the Adjust-
ment-1 Mode.
Resetting Method:
Press...

12
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.
Specified Value:
DiscA
B
SATD-S2
SATD-S3 1.3 to 2.4 Vp-p - 0.1 to +0.1 V
TCD-784
bbb              CD1
             Discchk XX...

13
6. Press the H button.
7. Check that the waveform on oscilloscope is clear, and the level
and jitter of waveform satisfy the specifications.
8. After checking, press the 
x button.
9. Repeat steps 3 through 8 for respective discs.
10. Press the 
! button to turn the power off.
Specified Value:
DiscAJitter (displayed value)
SATD-S2 1.25 to 1.65 Vp-p 20 (Hex) or less
TCD-784 1.3 to 1.7 Vp-p 15 (Hex) or less
bbb              CD1
             Discchk XX XX
Disc type (refer to Disc check list (page 11))
6....

14
Optical Pick-up Height Adjustment
Connection:
MAIN board
TP702 (MNT4)
TP703 (MNT5)
TP521 (GND)+
+
– oscilloscope
(normal mode
)
(CH1) (CH2)
CLV Jitter Check
Connection:
A
CLV jitter waveform
MAIN board
TP515 (PI)
TP511 (FOUT)
TP501 (VC)+
+
– storage
oscilloscope
(normal mode)
(CH2) (CH1)
Procedure:
1. Connect an oscilloscope to the TP515(PI)(CH1),
TP511(FOUT) (CH2) 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...

15
Overall Adjustment
Procedure:
1. Set the Adjustment-1 Mode. (See 5-2. Adjustment-1 Mode in
SECTION 5 (page 11))
2. Press the 6 button and 2 button, then the 9 button on the
remote commander (to initialize data).
3. Set a disc (TCD-784).
4. Press the 6 button and - button, then the 5 button on the
remote commander. (Adjustment will take about 2 minutes.)
5. Remove the disc when CD END is displayed.
6. Set a disc (SATD-S2).
7. Press the 6 button and - button, then the 5 button on the
remote commander....

16
Adjustment Location:
Ð MAIN Board (Component Side) Ð
TP511
(FOUT)TP515
(PI) TP524
(FE)TP501
(VC)
TP516
(TE)TP521
(GND)TP503
(RF)
TP703
(MNT5)
TP702
(MNT4) 

17 17
SECTION  7
DIAGRAMS
7-1. NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.Note:
Les composants identifiŽs par
une marque 0 sont critiques
pour la sŽcuritŽ.
Ne les remplacer que par une

spŽcifiŽ. Note on Schematic Diagram:
¥ All capacitors are in µF unless otherwise noted.  pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
¥ All...

18 18
SCD-1/777ES
7-2. PRINTED  WIRING  BOARDS  Ð RF/SLD-FG/SLD-MOT Boards Ð ¥ See page 17 for Circuit Boards Location.
IC001 E-2
IC002 C-4
IC003 A-3
IC004 A-2
IC005 C-3
IC006 C-3
IC007 C-2Ref. No. Location Ref. No. Location
¥ Semiconductor Location
ÐRF BoardÐ
Ref. No. Location
IC010 A-2
IC011 C-2
IC012 A-1
Q001 F-3
Q002 B-5
Q003 B-4Q004 B-4
Q006 A-3
Q007 D-5
Q008 B-5
Q009 B-5
(Page 22)
(Page 22) 

19 19
SCD-1/777ES
7-3. SCHEMATIC  DIAGRAM  Ð RF/SLD-FG/SLD-MOT Boards Ð ¥ See page 40 for Waveforms.
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.Les composants identifiŽs par une marque 0 sont
critiques pour la sŽcuritŽ. Ne les remplacer que

(Page
29)
(Page
28) 

20 20
SCD-1/777ES
7-4. PRINTED  WIRING  BOARDS  Ð LOAD-CN/LOAD-MOT/LOAD-SW/STB Boards Ð ¥ See page 17 for Circuit Boards Location.
(Page 22)