Note For Printed Wiring Boards And Schematic Diagrams - Sony STR-DB840 Service Manual

4-4.

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.
• a : Through hole.
• b : 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.
Q
B C E
These are omitted.
• Abbreviation
AUS : Australian model
CH : Chinese model
CND : Canadian model
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.
• f : internal component.
• 2 : nonflammable resistor.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
une marque 0 sont critiques
fied by mark 0 or dotted
line with mark 0 are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part pièce por tant le numéro
number specified. spécifié.
• U : B+ Line.
• V : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
∗
: Impossible to measure
• 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.
F : FM
J : CD
I : PHONO
• Abbreviation
AUS : Australian model
CH : Chinese model
CND : Canadian model
• Circuit Boards Location
DC (1) board
DISPLAY board
POWER board
VIDEO 3 board
SW board
BIAS (R) board
BIAS (RS) board
BIAS (LS) board
H.P board
14 14
SP board DC (2) board
AC board
DIGITAL board
MUTING board
BIAS (C) board
BIAS (L) board
S-VIDEO board
JOINT (1) (Q) board (DB840)/
JOINT (2) (Q) board (DB940)
MAIN board
VOL board
5.1 IN board
AU SW board
VIDEO board (DB840)/
OSD board (DB940)