Read Sony ICF-304 Service Manual online
10
10
ICF-304
ICF-304
4-2. SCHEMATIC DIAGRAM
Note:
• All capacitors are in µF unless otherwise noted. (p: pF)
• All capacitors are in µF 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.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Total current is measured with power on.
• Power voltage is dc 3 V and fed with regulated dc power
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
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.
• Signal path.
F
: FM
f
: AM
CF2
RV1
T1
CF1
SP1
BPF1
CV1-3
CT1-3
CT1-1
CV1-1
ANT1
D1
BP1
CV1-4
CT1-4
C5
CV1-2
R7
J1
CF3
C12
C13
TP4
R5
CT2
CT1-2
L6
L5
L2
L3
C15
C14
TP3
TP1
TP2
R6
C16
TP5
S1
C18
TP6
TP18
D3
R8
C20
C21
TP9
C23
C32
C22
C25
C26
C29
C30
C24
C27
TP7
S2
TP13
TP14
TP15
TP17
TP16
R10
TP11
TP12
C3
C1
C2
C4
C6
C8
TP8
L9
IC1
L8
L1
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