Sony MV-900SDS - Dream System 3, Руководство по обслуживанию

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MV-900SDS
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MV-900SDS
•
Note for Printed Wiring Boards and Schematic Diagrams
•
Circuit Boards Location
Note on Printed Wiring Boards:
•
X : parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
x : parts mounted on the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
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.
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
Note on Schematic Diagram:
•
All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
•
All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C : panel designation.
•
A
: B+ Line.
•
B
: B– Line.
•
H : adjustment for repair.
•
Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
•
Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : DVD PLAY
(
) : STANDBY
∗
: Impossible to measure
•
Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
L
: DVD (VIDEO)
F
: DVD (AUDIO)
J
: DIGITAL OUT
a : AUX INPUT (VIDEO)
E : AUX INPUT (AUDIO)
d
: CHECK IN
G
: CHECK OUT
LCD board
FRONT board
KEY board
MAIN board
SERVO board
SW board
JACK (IN) board
JACK (OUT) board