Sony STR-DB925, Руководство по обслуживанию

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– 15 – – 16 –
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the 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 /
4
W or less unless otherwise
specified.
• ¢ : internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
• 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 M
Ω
).
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
L
: AUDIO
g
: VIDEO
i
: SURROUND
d
: PB (TAPE)
G
: REC (TAPE)
p
: Y
l
: CHROMA
J
: CD
I
: PHONO
E
: PB (MD/DAT)
a
: REC (MD/DAT)
c
: DIGITAL OUT
N
: DIGITAL IN
For printed wiring boards.
Note:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
• p : parts mounted on the conductor side.
•
¢
: internal component.
•
b
: Pattern from the side which enables seeing.
• Indication of transistor
C
These are omitted
E B
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
1
2
IC103
!¡
X2
IC102
*™
XO
WAVEFORMS
– DISPLAY SECTION –
1
IC1
!£
– TUNER SECTION –
1
2
IC1101
@¶
X OUT
IC1201
(™
XO
– DIGITAL SECTION –
3
4
IC1101
#¢
BCK
IC1101
@ª
CLK OUT
5
6
IC1403
0
2QB
IC1101
#§
LRCK
7
8
IC1305
6
IC1305
!¡
,
!™
3.2Vp-p
4MHz
4Vp-p
7.28MHz
3.2Vp-p
4.33MHz
4Vp-p
4MHz
3.6Vp-p
24.576MHz
4.8Vp-p
12.28Vp-p
4.8Vp -p
3MHz
4.8Vp-p
48MHz
3Vp-p
12.27Vp-p
0.56Vp-p
49.152MHz
3Vp-p
12.28MHz