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4-2. SCHEMATIC DIAGRAM
ICF-SW22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
St
ai
Tap 2a 3 mp 4up5 wd Gap 7
3 WHEN OFF BUTTON
st-1
IS PRESSED : 0.5
5
=
uu
L2
L3
Lé
LS
L6
L7
Swi
sw2
SwW3
SW4
SW5
SW6
SW7
ANT
ANT
ANT
ANT
ANT
ANT
ANT
AMRF
FM
1
RF
(1.3)
cx20091
13)
FM/AM FRONT-END/ AMP/DET
AM AMP
"hac Foc Out
fo
ps | 05
+ tk
0. "eT ss279 "ey o1
Q6,7
SW AGC
AMP
AMIF
FMIF
IN
i]
NC
OMETER
E, Tourist
o +
\o]
te
x8
Seo
¢—11
/k#-—-> >
>
[-—>
R26
He
19
Q7
+
23,
28C 1623,
R29
)
CD
as
0.
Ro
N a
iO PD S
Baio
S,
o
(0)
|
((0.4))
D8
Nssia
34H R22
7 oN 220k:
ie
270
16.8
5
2S, 2d 26%80526 S05
.
Wie
in
Win
"ine We
Ma
R2t
PNe)
a
aio
258815
SWITCHING
(2:3)
a +
val
Ss
s
te)
wo
+
LED ON: 0.1
(EARPHONE)
R60
(3)
ae
ai
*
C)
PRE
w3y
s2
TS | sreaxer
R39
NEWS
@ MUSIC
&. Bk
(?
tak
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION
R8)
G
¢ ;
'2PCS, 3V
SWO
BAND
ALL
_HCM
29
6
H
2:9)
€F7739
(2.9)
>
<0
CONTROLLER
ED ONL ON
FM
MW
SWI
NC
OFF
«=RES)s-RXOOCRO)OTP
USS
a
()
D103
(0)
3
<=
GLIPRI 1!
oe
(2.9)
4
104
1 . 4
MAW
BLIPRITI(Y)
y
(¥)
6
ye
[sw]) aw)
%
abby
TOTAL CURRENT
pai
[ FM | |
11mA__ |
[Mw |
mA |
[SWITCH BOARD]
WR
My
i
a
C108 0.010
——
:
0
Ne
0.\On2e
C49
2.90}
(On } on
(3)
4.7k
3
Q>
Q>
>
7
i
2301823
29
|
LOW-PASS
eae
R42
|
(i)
6
(9) oy
—_
8
FILTER
1K
2.
2.4
H
bb bar
'L
:
of)
oat'
ata
w | 13.5mA
RIPPLE
((2.3)
Los
DTC144EK
.
|
FILTER
SWITCHING
0
C56
SW PUSH:
2.8)
BY
Bee
ak,
—
Note :
:
;
+ Power voltage is dc 3V and fed with regulated dc power supply
- Voltages are taken with a VOM ( tnput impedance 10M Q ).
* All capacitors are in I F unless otherwise noted. pF: uF
from battery terminal.
Voltage variations may be noted due to normal production
eae
Bre nol idicated except tar slectiovtice and
* Voltage and waveforms are dc with respect to ground under
tolerances,
no-signal ( detuned ) conditions.
* Signal path.
- All resistors are in 2 and %W or less unless otherwise
no mark : FM
i
c>
:FM
specified.
(
>: MW
* A
: internal component.
«
)) :SW
* [eee
: B+ Line
(
) : OFF
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