Sony MDS-JB930 Service Manual ▷ View online
33
6-3.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
(In addition to this, the necessary note is printed in each block)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
•
C
: panel designation.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
®
: Through hole.
• b
: Pattern from the side which enables seeing.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
E
: PLAY (ANALOG OUT)
p
: PLAY (DIGITAL OUT)
j
: REC (ANALOG IN)
l
: REC (DIGITAL IN)
• Abbreviation
CND : Canadian model
Note:
The components identi-
fied by mark
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
B
These are omitted.
C
E
Q
• Abbreviation
CND
: Canadian model
B
These are omitted.
C
E
Q
• Indication of transistor.
34
AC board
SW board
BAT board
MAIN board
VOL board
DISP board
BD board
PSW board
HP board
KEY board
• Circuit Boards Location
MDS-JB930
35
35
6-4.
PRINTED WIRING BOARD – BD Board –
•
See page 34 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
D101
A-1
D181
D-3
D183
D-3
IC103
B-1
IC123
D-2
IC171
D-1
Q102
B-1
Q103
C-1
Q104
B-1
• Semiconductor
Location
Ref. No.
Location
IC101
A-3
IC121
C-3
IC124
C-3
IC152
B-1
IC181
C-1
IC192
D-1
Q101
B-3
Q162
B-3
Q163
B-3
Q181
C-1
Q182
C-2
(SLIDE)
S102
REFLECT DET,
PROTECT DET
PROTECT DET
LOW REFLECT RATE/
UNPROTECT
HIGH REFLECT RATE/
WRITE PROTECT
(SPINDLE)
BLK
RED
(Page 43)
(Page 43)
MDS-JB930
36
36
6-5.
SCHEMATIC DIAGRAM – BD Board (1/2) –
•
See page 48 for Waveforms.
•
See page 49 for IC Block Diagrams.
(Page 37)
(Page 37)
(Page 37)
(Page 37)
(Page 37)
(Page 37)
(Page 37)
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