Note For Printed Wiring Boards And Schematic Diagrams - Sony STR-DE845 Service Manual

4-4.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

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.
• : internal component.
f
• 2 : nonflammable resistor.
• C : panel designation.
Note:
Note:
Les composants identifiés par
The components identi-
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 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 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
: FM
J : CD
I : PHONO
• Abbreviation
AUS : Australian model
CH : Chinese model
CND : Canadian model
MY : Malaysia model
SP : Singapore model
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.
• Circuit Boards Location
SP board
DC (1) board
POWER board
DISPLAY board
ROTARY board
BIAS (C) board
BIAS (R) board
BIAS (RS) board
BIAS (LS) board
H.P board
14 14
DC (2) board
AC board
DIGITAL board
5.1 IN board
AU SW board
MUTING board
VIDEO 3 board (DE945)
V. SWITCH board (E/PX)
BIAS (L) board
S-VIDEO board
VIDEO board (DE845)/
OSD board (DE945)
JOINT (1) (H) board (DE845)/
OSD JOINT (H) board (DE945)
MAIN board
VOL board