Sony ICF-SW40 - Schematic Diagram És++++++Sss+++Seseerecessreseserterseeesees

@ WAVEFORM
O
1.8Vp-p 75kHz
1c201 @
a,
Note :
* All capacitors are in « F unless otherwise noted. pF: y uw F
50WV or less are not indicated except for electrolytics and
tantalums,
* All resistors are in Q and %W or less unless otherwise
specified.
+ % : indicates tolerance.
«+ A: internal component.
. : B+ Line
. : Panel designation.
: adjustment for repair.
« Power voltage is de 4.5V and fed with regulated dc power
supply from external power voltage jack.
* Voltage and waveforms are de with respect to ground under
no-signal ( detuned ) conditions.
UU
no mark : FM
¢ ) : MW/LW
(> > 7SW
+ Voltages are taken with a VOM ( Input impedance 10M Q ).
Voltage variations may be noted due to normal production
tolerances.
« Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
* Circled numbers refer to waveforms.
* Signal path.
=> :FM
=p ©: MW/LW
=> .sw
* Abbreviation
IT : Italian
EA : Saudi Arabia
JE : Tourist
5-2. SCHEMATIC DIAGRAM @ Refer to page 21 for IC Block Diagrams.
[MAIN BOARD }
eae eC ———
14
18
20
Ri otk
Wt
$1 -} AX
GENS ‘
LOCAL 3. 3k
ern od cs
[ELA eB
Bt
185226-TEBSL
Ls Q6, 35
FERRITE-ROA LW/MW AGC
ANTENNA
REO
i
25C3931-C-Tx
SWITCH
2sK238711 Klé
RF AMP
d
935
si-2 BX i 2SB1781K-1146-R
LOCAL
1.90.7
CA
Ré
Po
R7
470
s
25
MA77-TX
oo
i]
Ls
C18 0.01
AN
Wr
Ri2 47k
AM IF ADJUSTMENT
U7
4.704
Rit 100%
RIS 100
C20 0.04
xNastb-TX
SW FREQUENCY
SELECT SWITCH
SW SWITC
Lw,
SWITCH
Q17,
€+") 2SK2096-TE8SL
5
CTI. L135
FM TRACKING
AQJUSTMENT
NO
23
OSCILLATOR 3yhiéy
10. Fate
R53
47k
[Hr
38
FM VCO ADJUSTMENT
PLLLPF ()
PILOTBET
ena @)
cao |
G) AM IF IN
) snp
() AGC 2
= () vec
(>) LCH
se) PILOTBET
27
1.9 a24
. BTAIS4TUA-T106
(*) MUTE
CBI 10 6.39
Cé5 47 6.34
Cé6 4.7 16
c7o 1
R61 4.7K C71 G.022
C72 0.022
Cé9 100 6.3¥
{ KEY BOARD]
> NORMA]
R225 1k
$211
IF INE!
BUFFER
aN c39
i Ss 0.01
| R36
1 10k
t zis x a
re
|
HE
esis
18
§
-
1 go 2 = 2
i837 [el® je]s 7s 3 Z
AGC SWITCH AGC SWITCH
wc7
———_—_—_oO==0-
STPVT)
R23! 10K
R23p 4 k
BAND (FM/AM)
C210 1000.
—1+-—
C211 1000p
€212 1000 C213 1000p
TEE raed Bt-ri08”
HT
MUTE ICZ20+
POWERAUAIO
POWERTUNER [1C201]
KS2 UPA170726B-527-1A7
yas SYSTEM CONTROL
LC® ORIVE
ENCORBER-DATA SEGCONT B SEGCONT A VCOH FM VBI (2V IN)
C232 0.1
=
oe
aursdieS1-an
{BACK LIGHT)
R267 100
tt. ae te
aE hi
CL Power TUNER |
== 1 8 =
R8B 220K
28
mre
me
mn
—
8S
POWERTUNER
POWERAUDIO
13. cg.
19838521817 ae
ENCOBER-CLOCK
ENCODER-BATA
AMP4.5V
$B007-03CP-TB
TP.
ager —1bémy rat
peedencstass
‘104
TC74VHC14FS EL)
Q3l, 52
1k
¢
1 SsseeeTe 17 LS
cag C100
i} 1
Lig ac-ac
ca CONVERTER
C101 228
R@2 J00k
BS
BTZ-TT1t-13A
93)
28041 ead
ia tic
032
25041 16Y6
C104 0.1
i
5
zw = oui
SCI7
Bl
1SS355-TE17
C106 3100p
5
a
ICF-SW40
TOTAL CURRENT
we ah
BRY BATTERY =,
SIZE “AA? ot
it
(IEe ie Tegan}
Ro . :
SPCS. 4.5V