Read Sony STR-DE725 Service Manual online
STR-DE725
— 7 —
— 8 —
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
For schematic diagrams.
Note:
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
•
%
: indicates tolerance.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
•
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
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
c
: DIGITAL
I
: PHONO
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
• Waveform
1 IC1201 (™
(XO)
2 IC1101 @¶
(X OUT)
3 IC1101 @ª
(CLK OUT)
4 IC102 *™
(XO)
4.0Vp-p
5.5Vp-p
5.4Vp-p
3.0Vp-p
4MHz
24.576MHz
12.288MHz
4.0MHz
For printed wiring boards.
Note:
Note:
• X
: parts extracted from the component side.
•
®
: Through hole.
• b
: Pattern from the side which enables seeing.
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
SW board
H.P board
SP SW board
DISPLAY board
BALANCE board
SP board
REAR AMP board
AC board
AMPLIFIER board
VIDEO board
TUNER board
D.IN/OUT board
DIGITAL board
AUDIO board
INPUT board
JOINT board
VOLUME board
L.B board
REG board
LED board
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