Read Sony XVM-R90D Service Manual online
XVM-R90D
10
10
MV-900SDS
•
Note for Printed Wiring Boards and Schematic Diagrams
Note on Printed Wiring Boards:
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
SERVO board is multi-layer printed board.
However, the patterns of intermediate-layer have not been in-
cluded in diagram.
However, the patterns of intermediate-layer have not been in-
cluded in diagram.
•
Indicaiton of transistor
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.
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.
and tantalums.
•
All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
A
: B+ Line.
•
Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
supply from ACC and BATT cords.
•
Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : DVD PLAY
(
under no-signal conditions.
no mark : DVD PLAY
(
) : CD PLAY
∗
: 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.
tion tolerances.
•
Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
L
: DVD (VIDEO)
F
: DVD (AUDIO)
•
Circuit Boards Location
LCD board
FRONT board
KEY board
MAIN board
SERVO board
SW board
JACK (IN) board
JACK (OUT) board
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
line with mark 0 are critical for safety.
Replace only with part number specified.
C
B
These are omitted.
E
Q
ra
U6
1
(DVDFRP),
yd
(CDRF)
(DVD play mode)
500 mV/DIV, 50 ns/DIV
1.2 Vp-p
ra
U6
1
(DVDFRP),
yd
(CDRF)
(CD play mode)
200 mV/DIV, 100 ns/DIV
700 m Vp-p
rs
U6
tj
(SIGO)
(DVD play mode)
500 mV/DIV, 50 ns/DIV
1.5 Vp-p
rs
U6
tj
(SIGO)
(CD play mode)
500 mV/DIV, 100 ns/DIV
1.5 Vp-p
rd
U6
rs
(FE) (DVD play mode)
50 mV/DIV, 20 ns/DIV
Approx.
120 mVp-p
120 mVp-p
rf
U6
ra
(TE) (CD play mode)
200 mV/DIV, 500 ns/DIV
Approx.
650 mVp-p
650 mVp-p
rf
U6
ra
(TE) (DVD play mode)
500 mV/DIV, 500 ns/DIV
Approx.
1.3 Vp-p
1.3 Vp-p
rg
U1
tf
(XMPSENJ)
2 V/DIV, 50 ns/DIV
177 ns
4.1 Vp-p
rh
U1
y;
(XOSC2)
2 V/DIV, 20 ns/DIV
29.8 ns
3.6 Vp-p
rj
U1
<zvc
(XRSDCLK)
2 V/DIV, 20 ns/DIV
30 ns
4.2 Vp-p
•
Waveforms
– SERVO Board –
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