Read Sony STR-DB798 Service Manual online
STR-DB798
19
19
STR-DB798
•
Note for Printed Wiring Boards and Schematic Diagrams
•
Indication of transistor
•
Circuit Boards Location
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.
•
f
: internal component.
• 2
: nonflammable resistor.
• C
: panel designation.
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• A
: B+ Line.
• B
: B- Line.
• H
: adjustment for repair.
•
Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TUNER
(
under no-signal conditions.
no mark : TUNER
(
) : VIDEO 1
•
Voltages are taken with a VOM (Input impedance 10 MW).
Voltage variations may be noted due to normal produc-
tion tolerances.
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.
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
F
: TUNER
J
: AUDIO (ANALOG)
c
: AUDIO (DIGITAL)
E
: VIDEO
•
Abbreviation
TW
TW
: Taiwan model
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.)
Caution:
Pattern face side:
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.
C
E
Q
AC board
DC PWR board
4-8 OHM board
(AEP, Taiwan)
(AEP, Taiwan)
COMP-V board
VOL board
DIRECT board
FUNC board
HP-V3 board
DISPLAY board
SPK-A board
S-VIDEO board
VIDEO board
VIDEO-AU board
AU-IN board
tuner
DIGITAL board
A/V SYNC board
SPK-B board
FAN board
STAY-5 board
MAIN board
STAY-1 board
STAY-2 board
A CLASS board
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