Diagrams; Circuit Boards Location - Sony STR-DE445 Service Manual

3-1. CIRCUIT BOARDS LOCATION

STBY board
POWER SWITCH board
HEADPHONE board
DISPLAY board
JOG board
SECTION 3

DIAGRAMS

AC SEL board (E, PX model)
VIDEO board
S-VIDEO board (DE545, SE501 model)
DIGITAL board
TUNER UNIT
MAIN board
TUNER SWITCH board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For schematic diagrams.
Note:
• 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 Ω and
1 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• : internal component.
f
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note: Note:
The components identified by Les composants identifiés par
mark 0 or dotted line with mark une marque 0 sont critiques
0 are critical for safety. pour la sécurité.
Replace only with part number Ne les remplacer que par une
specified. pièce portant le numéro spécifié.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM
• 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.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
c : digital out
• Abbreviation
CND : Canadian model
AUS : Australian model
CH : Chinese model
MY : Malaysia model
SP : Singapore model
TW : Taiwan model
7 7
STR-DE445/DE545/SE501
For printed wiring boards.
Note:
• X : parts extracted from the component side.
•
a : Through hole.
• : internal component.
f
• b : Pattern from the side which enables seeing.
C
Q These are omitted.
B E
B C E
These are omitted.
• Waveform
DIGITAL Board
1 IC1005
25
5.5Vp-p
12.288MHz
DISPLAY Board
IC102 is (XO)
1
3.6Vp-p
16.0MHz
MAIN Board
IC301 qf (XO)
1
2.8Vp-p
4.33MHz