Read Sony SRF-M807 Service Manual online
SRF-M807
7
7
SRF-M807
SECTION 4
DIAGRAMS
•
Note for Printed Wiring Boards and Schematic Diagrams
Note on Schematic Diagram:
•
All capacitors are in
µ
F unless otherwise noted. (p: pF)
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.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
•
Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
no mark : FM
(
supply from battery terminal.
no mark : FM
(
) : AM
•
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.
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
F
: FM
f
: AM
•
Abbreviation
AUS
AUS
: Australian model
PA
: Panama model
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
W
: indicates side identified with part number.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
Waveforms
– MICRO COMPUTER Board –
2
Q101 (Collector)
500 mV/DIV, 100
n
s/DIV
255 ns
1.5 Vp-p
1
3
IC101
tg
(XOUT)
200 mV/DIV, 5
µ
s/DIV
13.3
µ
s
0.4 Vp-p
Q101 (Base),
Q102 (Collector)
Q102 (Collector)
200 mV/DIV, 100
n
s/DIV
255 ns
0.6 Vp-p
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