Sony MDS-JB730 Service Manual ▷ View online
– 35 –
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)
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
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: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
• Indication of transistor.
B
These are omitted.
C
E
Q
– 36 –
• Circuit Boards Location
SW board
MAIN board
VOL board
DISP board
BD board
PSW board
HP board
MDS-JB730
– 37 –
– 38 –
6-4.
PRINTED WIRING BOARD – BD Board –
•
See page 36 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 45)
(Page 45)
MDS-JB730
– 39 –
– 40 –
6-5.
SCHEMATIC DIAGRAM – BD Board (1/2) –
•
See page 43 for Waveforms.
•
See page 55 for IC Block Diagrams.
(Page 41)
(Page 41)
(Page 41)
(Page 42)
(Page 42)
(Page 42)
(Page 42)
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