Read Sony STR-LSA1 Service Manual online
17
17
SECTION 4
DIAGRAMS
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side A)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side B)
the parts face are indicated.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
• Indication of transistor.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• 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.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: TUNER
4-1. CIRCUIT BOARDS LOCATION
DISPLAY board
HEADPHONE JACK board
POWER board
SPEAKER TERMINAL board
SENSOR board
RDS board
MAIN board
DAC board
DIGITAL board
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
• WAVEFORMS
— RDS BOARD —
— RDS BOARD —
1
IC52
qf
(XO)
1.85Vp-p
(4.33 MHz)
0.24
µ
sec
— DAC BOARD —
1
IC301
eg
(XOUT)
44 nsec
6 Vp-p
(22 MHz)
— DIGITAL BOARD —
2
IC114
qd
(XOUT)
3.5 Vp-p
0.1
µ
sec
(10MHz)
1
IC109
es
(XO)
2.6 Vp-p
(24.576MHz)
40 nsec
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