Sony STR-DB798 Service Manual page 19

• 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.)
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.
• Indication of transistor
C
Q These are omitted.
B E
Q
B C E
These are omitted.
STR-DB798
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
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.
•
: internal component.
f
• 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
( ) : VIDEO 1
• Voltages are taken with a VOM (Input impedance 10 MW).
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 (ANALOG)
c : AUDIO (DIGITAL)
E : VIDEO
• Abbreviation
TW : Taiwan model
• Circuit Boards Location
DC PWR board
HP-V3 board
DISPLAY board
STAY-5 board
FAN board
MAIN board
STAY-1 board
19 19
4-8 OHM board
AC board
(AEP, Taiwan)
COMP-V board
VOL board
FUNC board DIRECT board
SPK-B board
SPK-A board
S-VIDEO board
VIDEO board
VIDEO-AU board
AU-IN board
tuner
A/V SYNC board
DIGITAL board
STAY-2 board
A CLASS board
STR-DB798