Read Sony XVM-R75 Service Manual online
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11
XVM-R75
3-1. CIRCUIT BOARDS LOCATION
MICRO SW board
DISPLAY board
POWER SW board
OPEN SW board
E-PHONE board
MAIN board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for 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.
•
f
: internal component.
•
C
: panel designation.
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
(Side A)
parts face are indicated.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
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
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• B13 of XVM-R75 is connected to Connection Box with a
monitor cable.
Power voltage is dc 14.4 V from ACC cord of the Connec-
tion Box and fed with regulated dc power supply.
Power voltage is dc 14.4 V from ACC cord of the Connec-
tion Box and fed with regulated dc power supply.
• B13 of XVM-R75 is connected to Connection Box with a
monitor cable.
Voltage and waveforms are measured at input the color
bar signal from INPUT 1 VIDEO (B11) jack of the Con-
nection Box.
Voltage and waveforms are measured at input the color
bar signal from INPUT 1 VIDEO (B11) jack of the Con-
nection Box.
• 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.
g
: VIDEO
F
: AUDIO
• Abbreviation
CND : Canadian model.
for printed wiring boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
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