Circuit Boards Location - Sony XVM-R75 Service Manual

THIS NOTE IS COMMON FOR PRINTED WIRING
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
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• : internal component.
f
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce por tant le numéro
spécifié.
number specified.
• 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.
• 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.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
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.
Caution:
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) parts face are indicated.

3-1. CIRCUIT BOARDS LOCATION

DISPLAY board
E-PHONE board
11 11
XVM-R75
MICRO SW board
POWER SW board
MAIN board
OPEN SW board