Read Sony ICF-C620L Service Manual online
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• IC Block Diagrams
IC1 CXA1019S
IC50 CXA1635S
22
21
18
20
19
17
16
1
8
5
3
4
6
7
VCC2
CC
PREF
VREG
NF(A)
OUT(A)
GND
PGND
MOTOR
SENSE
EQOUT(A)
EQIN(A)
IN(A)
C
15
12
14
13
2
11
9
10
VCC
OUT(B)
NF(B)
VOL IN
VREF
IN(B)
EQIN(B)
EQOUT(B)
V
REFERENCE
VOLUME
CONTROL
V1
CONVERTER
VOLUME
CONTROL
RIPPLE
FILTER
RIPPLE
FILTER
BASS
BOOST
V
REFERENCE
–
+
PRE AMP
–
+
PRE AMP
+
–
DRIVER
+
–
DRIVER
+
–
DRIVER
+
–
AMP
VREF
50
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
IC51 MM1038CFF
VREF
6
5
7
8
3
4
2
1
PC OU
T
GND
GND
VS
VCC
PHASE
SPEED ADJ
SW
Note :
• All capacitors are in
• 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
Ω
and 1/4 W or less unless otherwise
specified.
•
¢
: internal component.
Note : The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
•
: B+ Line.
•
: adjustment for repair.
• Voltage is dc with respect to ground under no-signal (detuned)
conditions.
• no mark : FM
( ) : MW
< >
< >
: PB
• Voltage are taken with a VOM (Input Impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerance.
tolerance.
• Signal path.
: FM
: MW
: PB
B
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