Read Sony SRF-R405 (serv.man2) Service Manual online
5
SRF-R405
Note on Printed Wiring Board.
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
•
: Through hole.
NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
• Waveforms
– MAIN Board –
Note on Schematic Diagram.
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF) 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.
•
C
: panel designation.
•
H
: adjustment for repair.
•
A
: B+ Line.
• Power voltage is dc 3 V and fed with regulated dc power supply
from terminals.
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
1
IC506
wk
(X OUT)
2
Q601
(collector)
5
µ
s / 1V DIV
75 kHz
0.2
µ
s / 2V DIV
3 MHz
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