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Sony STR-DB780 Service Manual

Sony STR-DB780
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19
STR-DA1ES/DB780
5-7. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
X : parts extracted from the component side.
Y : parts extracted from the conductor side.
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Indication of transistor
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.
C
B
These are omitted.
E
Q
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
Note on 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 and
1
/
4
W or less unless otherwise
specified.
f
: internal component.
2 : nonflammable resistor.
C : panel designation.
A : B+ Line.
B : B– Line.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
(): VIDEO 1
•Voltages are taken with a VOM (Input impedance 10 M).
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.
F : TUNER
J : AUDIO IN (ANALOG)
c : AUDIO IN (DIGITAL)
E : VIDEO IN
•Abbreviation
CH : Chinese model
CND : Canadian model
KR : Korean model
MY : Malaysia model
SP : Singapore model
TW : Taiwan model
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.

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Sony STR-DB780 Specifications

General IconGeneral
TypeStereo Receiver
Total Harmonic Distortion0.09 %
Digital inputs2 Optical, 1 Coaxial
Weight10.5 kg
Video inputscomposite
Video outputs1 composite, 1 S-Video
Output Power100 Watts (8 Ohms, 20 Hz - 20 kHz, 0.09% THD)
Signal-to-Noise Ratio96 dB (Line in)
Input Sensitivity150 mV (Line in)

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