Download STR-DE725

STR-DE725
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
AC board
REG board
DISPLAY board
AMPLIFIER board
SP board
REAR AMP board
SP SW board
VIDEO board
For schematic diagrams.
Note:
For printed wiring boards.
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 1/4 W or less unless otherwise
specified.
•
%
: indicates tolerance.
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
• 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.
TUNER board
D.IN/OUT board
H.P board
DIGITAL board
AUDIO board
LED board
SW board
•
•
•
•
•
INPUT board
JOINT board
L.B board
VOLUME board
BALANCE board
•
•
•
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 production
tolerances.
Waveforms are taken with a oscilloscope.
Circled numbers refer to waveforms.
Signal path.
F : FM
J : CD
c : DIGITAL
I : PHONO
• Waveform
1 IC1201 (™ (XO)
4.0Vp-p
4MHz
2 IC1101 @¶ (X OUT)
5.5Vp-p
24.576MHz
3 IC1101 @ª (CLK OUT)
5.4Vp-p
12.288MHz
4 IC102 *™ (XO)
3.0Vp-p
4.0MHz
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