ICF-J1 - Sony Audio Service Manual (repair manual). Page 13

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ICF-J1
– 15 –
– 16 –
5-3.
SCHEMATIC  DIAGRAM
• IC Block Diagrams
IC1
CXA1019S
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
FM
DISCRIMINATOR
AF POWER AMP
AM FE
FM IF
TUNING
METER
AM IF DET AGC
FM FE
23
22
21
20
24
25
19
18 17 16
29 28 27 26
30
GND
GND
AF OUT
VCC
RIPPLE
FIL
TER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
METER
N.C
FM IF IN
AM IF IN
FM/AM BAND
SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND
GND
IC2
BA6640F-E2
18 17
16
15 14
13
12
11
10
1
2
3
4
5
6
7
8
9
+
+
+
BIAS
RF OUT
RFC
BASE OUT
MUTE OUT1
IN1
NF1
PWR OUT1
VCC
STNBY
PWR MUTE
INVOUT
NFB
MUTE OUT2
IN2
NF2
PWR OUT2
GND
RIPPLE FILTER
MUTE
PWR1
PWR2
INV
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
C
: panel designation.
A
: B+ Line.
U
: B+ Line.
H
: adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
(
) : MW
〈〈
 
〉〉
: SW
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
f
: MW/SW
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