Sony ICF-25 User manual

Frequency range
Antennas
Speaker
Power output
Output
Power requirements
Battery life
Dimensions
Weight
MICROFILM
SPECIFICATIONS
FM: 87.6—107 MHz (for European contries)
87.6—108 MHz (for other countries)
MW: 530—1,605 kHz (566—187 m)
SW: 5.95—18 MHz (50.4—16.7 m)
FM/SW: Telescopic antenna
MW: Built-in ferrite bar antenna
Approx. 7.7 cm (3 inches) dia.
200 mW (at 10 % harmonic distortion)
Earphone jack (minijack)
4.5 V dc, three batteries, IEC designation R6
(size AA)
DC IN 4.5 V jack accepts:
Approx. 35 hours with Sony SUM-3(NS) New
Super batteries
Approx. 194 x 92x 34 mm (w/h/d)
(734x 35x 13% inches),
including projecting parts and controls with the
carrying handle pushed in
Approx. 460g (1 Ib 1 oz), including batteries
Canadian Model
AEP Model
E Model
AUS Model
FEATURES
e@ High selectivity and high sensitivity with one chip IC (Integrated
Circuit).
Fine tuning knob for easier tuning in SW reception.
e@ Two different power sources: batteries and house current.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
A ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET
UNE MARQUE SUR LES DIAGRAMMES SCHE-
MATIQUES ET LA LISTE DES PIECES SONT CRITIQUES
POUR LA SECURITE DE FONCTIONNEMENT. NE REM-
PLACER CES COMPOSANTS QUE PAR DES PIECES
SONY DONT LES NUMEROS SONT DONNES DANS CE
MANUEL OU DANS LES SUPPLEMENTS PUBLIES PAR
- FM/MW /SW
3BAND RECEIVER
SONY.

ICF-25
SECTION 1
DIAL CORD STRINGING
1) Silkworm Gut Preparation
°
Q
Crush the eyelet.
Note: Silkworm gut is not supplied as
replacement part.
Subsitute a string for fishing line.
Make two
knots.
To)
2) Silkworm Gut Stringing
fo)
eyelet
wo
volume knob
—
A
<a
°
0 (inch)

20
15
10
(cm)
0
(inch)
0
3) Dial Cord Preparation
233.5mm
E
COMME
|
spring
Crush the hook.
nin)
eal
5mm
P1.7x4
4) Dial Cord Stringing
oe VC drum
1, Turn the tuning capacitor fully counterclockwise.
2. Set the VC drum and tighten the screw.
ZEN
j
el
fi
1
Set as illustrated.
SAH
SS
; aa shaft
ICF-25

ICF-25 |
3. Hook the dial spring to the VC drum.
4. String the dial cord in the numerical order given.
5) Pointer Installation
1. Turn the tuning shaft fully counterclockwise.
2 Install the pointer to the dial cord after setting side * of
the pointer to end of the chassis each other.
pointer
| =e
dial cord
dial cord
tuning shaft

ICF-25
SECTION 2
ADJUSTMENTS
2-1. AM SECTION
— MW — = we
@ Perform the adjustment in the order of MW. @ SW FINE: center
AM
RF
SG
AM
RF
SG
Put the lead-wire antenna
We
close
to
the
set.
10pF
antenna
lead
SSS
30%
amplitude
30%
amplitude
modulation
by
modulation
by
400H2
signal
400Hz
signal
VTVM
@ Repeat the procedures in each adjustment (0.5—5V AC range)
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors.
earphone
IF ALIGNMENT SW TRACKING ADJUSTMENT
Adjust for a maximum reading Adjust for a maximum reading
on VTVM. on VTVM.
455kHz 5.8MHz 18.5MHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading
on VTVM.
620kHz
L2
MW FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading
on VTVM.
CTS 1680kHz
L6 520kHz
18.5MHz
Adjust for a maximum reading
on VTVM.
SW FREQUENCY
COVERAGE ADJUSTMENT
—5h—
ICF-25
2-2. FM SECTION
e Repeat the procedures in each adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors.
VTVM
(0.5—5V AC range)
FM RF SG
0.01uF antenna lead
+22.
5kHz
frequency
?
deviation
by
400Hz
signal
earphone
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading
on VTVM.
86.5MHz 109.5MHz
(87.35MHz) (108 MHz)
LS
FM TRACKING ADJUSTMENT
86.5MHz
(87.35MHz)
109.5MHz
(108MHz)
( ): AEP model ( ): AEP model

SECTION 3
| ICF-25 ICF-25 |
3-1. MOUNTING DIAGRAM DIAGRAMS
1 2 3
6 7 8 9 10 11 12 13 14 15
A
L2 MW FERRITE-ROD ANTENNA
B
ea
ee
ae
ees
eee
FW
TeLescoPc
re
i
Cae
jeg
TOD
RED
;
Soa
ee
cv2
BRN
S Tih
E (7,
(JACK BOARD]
TOTAL CURRENT
7mA
/
Hi
SHIELD PLATE
) ORY BATTERY
SIZE "AA"
(IEC DESIGNATION R6 )
3PCS 4.5V
@ Semiconductors Lead Layout
Note:
@ oO— : parts extracted from the component side
TLR226
C€xX20091
@
¢@—
:
parts
extracted
from
the
conductor
side.
n+] @ @ se: part mounted on the conductor side.
| cathode
anode

ICF-25 ICF-25
3-2. SCHEMATIC DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
SI cg
{
MAIN
BOARD)
Ls
380p
FM SI-5
is
£
rl
'
FM OSC fS cT4 SF, _$3.3k MW Sop CTS FM
24p N A |
MW
CANADIAN
MODEL’
'
AEP MODEL $i-2 SI-6 cs *
I | Is spk |
SW
LS 4G - 7 te
sw ys Lig S Cll R8 : ]
ANTENNA! = e cT2 oa, swOSC 1 iop | =33k cv2 Cvi-4 Icl
( CX20091
| FM/AM RECEIVER SYSTEM
ET er ye ee ee a
- {JACK BOARD J
TELESCOPIC 4.5V
ANTENNA
ee a ec ee :
METER 30
O ses ? Jl
ae EN] cmPHONE
®
E es
C2\ C28 = SPEAKER
0.1 VIOV & le (| 8a.
1 So |
63V
||
TOTAL
CURRENT
I iF | oFM TUNED: 0.2V Fath I
SELECT OL NC NC ouT LIF | 1 SW:4mA
€5) au OD Q m ya
0.65V
(0.1V)
[
POWER
|
1 a eS
I
|
100p
YLT
[0c
IN
4.5v
|
IN
4.5V
tL 24 4d O
4.7/25V (¥) | :
AN | T ORY BATTERY
A oid | 1 SIZE AAT
TUNE c20 [oxo Tih 1 See -L-(IEC DESIGNATION R6)
oF Jol |éeSy | ey I I 3 PCS 4.5V
Cl3 | |
4.7/25V ee | Si 18
| |
1
ga
ee
SR
RI
a
a
fee
se
gn
ts
ena
tN
ee
tly
ET
fe
ce
SO
eg
et
Oat
Er
Ae
NR
ad
Ee
yee
ee
eee
eee
DI TLR226
Note:
e
All
capacitors
are
in
uF
unless
otherwise
noted.
pF
:
wyF
e
Voltages
are
dc
with
respect
to
ground
unless
otherwise
e@
Voltage
variations
may
be
noted
due
to
normal
produc-
SOWV
or
less
are
not
indicated
except
for
electrolytics
noted.
tion
tolerances.
and
tantalums.
e@
Readings
are
taken
under
no-signal
conditions
with
e
»
:
Signal
Path
e All
resistors
are
in
ohms,
%W
unless
otherwise
noted.
a
VOM.
kQ : 10002, MQ : 1000k2 N k: EM ‘
@ & S iaternal component ° ag ; cia Note: Voltages are measured with a VOM (50kQ/V).
< > : SW

ICF-25
SECTION 4
EXPLODED VIEW AND PARTS LIST
anf WNnr
wom
NOTE:
* The mechanical parts with no reference
number in the exploded views are not
supplied.
service.
ICF-25
GENERAL
Part No.
3-593-019-00
3-703-358-01
3-703-358-08
3-881-911-00
3-881-923-00
7-627-552-47
3-890-231-00
3-892-803-01
3-892-804-01
3-892-805-01
3-892-806-01
3-892-807-01
*3-892-808-01
*3-892-809-01
3-892-814-01
3-892-814-21
3-892-817-01
3-892-818-01
3-892-819-01
3-892-820-01
3-892-821-01
3-893-102-01
3-893-102-11
*3-893-106-01
*3-893-104-01
*3-893-105-01
*3-893-107-01
3-893-108-01
7-621-772-00
7-621-775-40
7-622-207-05
7-623-508-01
7-624-106-04
7-625-712-40
7-671-156-01
7-682-548-04
7-685-147-19
7-685-547-14
7-685-549-14
9-911-825-32
3-893-109-01
X-3892-809-1
X-3892-810-1
- Items marked " * " are not stocked since
they are seldom required for routine
Some delay should be antici-
pated when ordering these items.
SECTION
Description
CLAW, SPEAKER
PIN, PARALLEL (DIA. 2X5)
PIN, PARALLEL (DIA. 2X20)
PULLEY
SPRING
SCREW (1.7X4)
SPRING, COMPRESSION
HANDLE
SPRING
STOPPER, HANDLE
SHAFT, TUNING
SLIDER
ADJUSTOR
SELECTOR, BAND
(SILVER)... KNOB, TUNING
(VIOLET)... KNOB, TUNING
STAND
SPRING
TERMINAL, BATTERY
KNOB, CONTROL
KNOB, F.T
(SILVER)...GRILLE, SPEAKER
(VIOLET)...GRILLE, SPEAKER
PLATE (A), SHILD
PLATE, BACK, DIAL
PLATE (C), SHIELD
PLATE (B), SHIELD
DRUM, VC
SCREW +P = 2X4
SCREW +B 2.6X8
N 2265. TYPE 2
LUG, 3
STOP RING 3.0, TYPE -E
RIVET
BALL,
SCREW
2X5
STAINLESS
+B 3X8
SCREW
SCREW
SCREW
+BTP 3X10 TYPE2 N-S
+BTP 3X10 TYPE2 N-S
+BTP 3X14 TYPE2 N-S
STRING, TETRON DIAL (0.3)
CHASSIS
BATTERY LID ASSY
POINTER ASSY
CAPACITORS:
No.
42
42
43
44
44
44
44
44
44
45
46
No.
72
72
73
74
hs)
75
76
77
78
78
79
80
80
- All capacitors are inuF.
Refer to the
pacitors are omitted.
MF:uF, PF:ypF.
- If there are two or more same circuitsin a
set such as a stereophonic machine, only
typical circuit parts may be indicated and
capacitors and resistors in other same
circuits may be omitted.
COILS
- MMH : mH, UH : WH
SEMICONDUCTORS
In each case, U
UA---: pA---, UPA-
UPD---: uPD:--
—+1 2
GENERAL
Part No.
X-3893-102-1
X-3893-103-1
X-3893-114-1
X-3893-101-1
X-3893-104-1
X-3893-105-1
X-3893-106-1
X-3893-107-1
X-3893-108-1
*3-703-593-01
*7-623-605-01
ACCESSORY &
Part No.
71 A.1-463-331-11
71 A. 1-463-534-11
3-701-316-00
3-703-729-00
3-703-710-01
3-893-113-01
3-893-114-01
3-893-115-01
3-893-124-01
3-985-622-61
3-995-995-11
3-995-995-41
3-985-622-41
3-893-123-01
3-893-124-01
Common ca-
following lists for their part numbers.
: u, for example:
: MPA---, UPC---: yPC
SECTION
Description
(SILVER)...KNOB, BAND ASSY
(VIOLET)...KNOB, BAND ASSY
CABINET ASSY, REAR
(AEP ;SILVER)...CABINET ASSY, MAIN
(AEP ;VIOLET)...CABINET ASSY, MAIN
CES STIVER) s.c:cteisiere CABINET ASSY, MAIN
(E,AUS;VIOLET)...CABINET ASSY, MAIN
(Canadian;SILVER)...CABINET ASSY, MAIN
(Canadian;VIOLET)...CABINET ASSY, MAIN
(AEP)....LABEL, FTZ
EYELET 1.3X2.5
PACKING MATERIAL
Description
(Canadian)....ADAPTOR, AC
(NE Da) jstsseveveretetere ADAPTOR, AC
(VIOLET)...LABEL, COLOR
(SILVER)...LABEL, COLOR
STICKER, SONY SYMBOL (12)
CUSHION
(AEP ,Canadian)... INDIVIDUAL CARTON
(WITH AC ADAPTOR)
(AEP ,E,AUS)...... INDIVIDUAL CARTON
CASE, ADAPTOR
MAT, MIRROR
(AEP ,Canadian,E£,AUS)...MANUAL, INSTRUCTION
(AEP)......MANUAL, INSTRUCTION
SHEET, PROTECTION (FOR AC ADAPTOR)
(Canadian)...SLEEVE AC-120 (FOR AC ADAPTOR)
(AEP)........SLEEVE AC-450 (FOR AC ADAPTOR)
The components identified
by shading and mark A\are
critical for safety.
Replace only with part
number specified.
Les composants identifiés par
une trame et une marque /\sont
critiques pour la sécurité.
Ne les remplacer que par
une piece portant le numéro
spécifie.

ELECTRICAL PARTS
number in the exploded views are not
supplied.
* Items marked " * " are not stocked since
they are seldom required for routine
Ref.No. Part No. Description |Ref.No.
501 1-501-222-21 ANTENNA, TELESCOPIC Jl
502 *1-612-748-11 PC BOARD, JACK J2
503 *A-3660-502-A PC BOARD ASSY, MAIN
Ll
BPF 1-235-171-00 FILTER, BAND PASS 2
: 3
G2 1-102-958-00 CERAMIC 20PF 5% 50V
c3 1-102-959-00 CERAMIC 22PF 10% 50V L4
L4
c4 1-102-672-00 (Canadian)...CERAMIC 24PF
c4 1-102-883-00 (AEP)........CERAMIC 27PF 5% 50V L5
L5
c5 1-102-074-00 CERAMIC 0.001MF 10% 50V
C6 1-123-356-00 ELECT 10MF 20% 16V L6
c8 1-103-739-00 POLYSTYRENE 0.0039MF 5% 50V L7
L8
c9 1-103-715-00 POLYSTYRENE 390PF 5% 50V
C10 1-102-967-00 CERAMIC 22PF 5% 50V Rl
Gl 1-102-285-00 CERAMIC 10PF O.5PF 50V R2
R3
(eal 1-161-013-00 CERAMIC 0.01MF 10% 25V
C13 1-123-369-00 ELECT 4.7MF 20% 25V R4
C14 1-123-369-00 ELECT 4.7MF 20% 25V R5
R6
Gis. 1-123-356-00 ELECT 10MF 20% 16V
C16 1-161-023-00 CERAMIC 0.068MF 10% 25V R7
Cl? 1-161-055-00 CERAMIC 0.022MF 10% 25V R8
RQ
C18 1-123-356-00 ELECT 10MF 20% 16V
C19 1-123-298-00 ELECT 470MF 20% 6.3V Sl
C20 1-161-974-00 CERAMIC 0.1MF 0 16V
SP
C21 1-161-974-00 CERAMIC 0.1MF 0 16V
C22 1-123-298-00 ELECT 470MF 20% 6.3V ie
C23 1-161-974-00 CERAMIC 0.1MF 0 16V
VCl
C24 1-123-369-00 ELECT 4. 7MF 20% 25V
C25 1-123-308-00 ELECT 220MF 20% 6.3V VR1
C26 1-102-112-00 CERAMIC 330PF 10% 50V
C27 1-102-973-00 CERAMIC 100PF 5% 50V
C28 1-131-418-00 ELECT(SOLID) 1MF 20% 10V
C29 1-161-974-00 CERAMIC 0.1MF 0 16V
C30 1-102-975-00 CERAMIC 100PF 10% 50V
C31 1-102-975-00 CERAMIC 100PF 10% 50V
CFL 1-527-870-00 FILTER
CF2 1-567-051-61 FILTER, CERAMIC (FM)
CF3 1-567-051-61 FILTER, CERAMIC (FM)
Cre: 1-141-257-00 CAP, TRIMMER
CT6 1-141-232-00 CAP, TRIMAR 11PF
cv2 1-141-295-11 CAP, TRIMMER (FINE TUNING)
Dl 8-719-812-26 DIODE TLR226
ICl 8-752-009-10 IC CX20091
NOTE:
* The mechanical parts with no reference CAPACITORS:
- All capacitors are in uF.
pacitors are omitted.
ICF-25
ELECTRICAL PARTS
Part No.
1-507-398-00
1-507-459-00
*1-401-495-11
1-402-106-11
1-402-073-11
*1-422-149-00
*1-422-184-11
1-422-121-00
1-422-131-00
1-406-092-11
1-406-093-11
1-421-659-11
1-247-143-00
1-247-101-00
1-246-473-00
1-247-153-00
1-247-141-00
1-246-473-00
1-246-441-00
1-247-143-00
1-247-152-00
1-554-901-11
1-503-369-11
1-404-341-00
1-151-463-11
1-230-363-11
Common ca-
Refer to the
following lists for their part numbers.
MF:pF, PF: pF.
» UPC---: pPC,
service. Some delay should be antici- COILS
pated when ordering these items. MMH: mH, UH : nH
PECL UH Ge 5 chereopantec machine, onty 2 ICOROUC TDR
typical circuit parts may be indicated and yaa fr pede tila =
capacitors and resistors in other same i 2 :
circuits
may
be
omitted.
UPD---:
uPD---
—1 3—
Description
EARPHONE JACK
JACK
LOADING ANTENNA COIL
ANTENNA, FERRITE-ROD (MW)
COIL, ANT (SW)
(AEP)........COIL, AIR-CORE
(Canadian)...COIL, AIR-CORE
(AEP)........COIL, FM OSCILLATION
(Canadian)...COIL, FM OSCILLATION
COIL, OSC (MW)
COIL, OSC (SW)
COIL, CHOKE 20UH
CARBON 3.3K 5% 1/4W
CARBON 56 5% 1/4W
CARBON 1K 5% 1/4W
CARBON 8.2K 5% 1/4W
CARBON 2.7K 5% 1/4W
CARBON 1K 5% 1/4W
CARBON 47 5% 1/4W
CARBON 3.3K 5% 1/4W
CARBON 7.5K 10% 1/4W
SWITCH, BAND SLIDE
SPEAKER
TRANSFORMER, IF
CAP, TUNING, POLYETHYLENE
RES, VAR, CARBON (WITH SW) 50K
e components identified
by shading and mark /\are
critical for safety.
Replace only with part
number specified.
Les composants identifiés par
sont
pour la sécurité.
les remplacer que par
une piece portant Je numéro
specifie.

ICF-25
English
. 84E0467-1
Sony Corporation
Printed in Japan
9-951-428-11 —14— © 1984