Sony CF-303 User manual

1
Ver 1.1 2004. 04
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-927-146-12
2004D04-1
© 2004. 04
FM/AM RADIO
ICF-303
FM/LW RADIO
ICF-303L
Photo: ICF-303
SPECIFICATIONS
Frequency range:
Central and East European model
Band ICF-303
FM 65 - 108 MHz
AM 530 - 1605 kHz
Italian model
Band ICF-303
FM 87.5 - 108 MHz
AM 526.5 - 1606.5 kHz
Other countries model
Band ICF-303 ICF303L
FM 87.5 - 108 MHz 87.5 - 108 MHz
AM 530 - 1605 kHz —
LW — 153 - 255 kHz
Speaker
Approx. 6.6 cm (2
5/8 inches) dia., 8 Ω
Output
v(earphone) jack (minijack)
Power output
100 mW (at 10 % harmonic distortion)
Power requirements
3 V DC, two R6 (sizeAA) batteries
3 V DC, two LR6 (size AA) batteries
Dimensions
Approx. 156.9 ×82.5 ×41.1 mm (w/h/d)
(6
1/4 ×3 1/4 ×1 5/8 inches) incl. projecting parts
and controls
Mass
Approx. 309.5 g (10.9 oz) incl. batteries
Supplied accessories
Operating instructions (1)
Design and specifications are subject to change without
notice.
Features
• Compact radio
• TUNE indicator for easy tuning
SERVICE MANUAL
ICF-303/303L
Canadian Model
E Model
Australian Model
Chinese Model
ICF-303
AEP Model
ICF-303/303L

– 2 –
mark Center
Frequency
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
HOWTO CHANGETHE CERAMIC FILTERS
This model is used two ceramic filters of CF1 and CF3.
You must use same type of color marked ceramic filters in order to
meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it’s supply two pieces in one package as a spare parts.
markmark
CF3
CF1
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be
damaged by heat.

– 3 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 4 –
1 Unsolder the 2 places.
2
3 screw (2x8)
4 claws
5 chassis assy
6 holder, jac
k
7 MAIN board
chassis
rack
A
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (REAR) ASSY
2-2. MAIN BOARD
SECTION 2
DISASSEMBLY
1 screws +P 2.6x12
5 screws B 1.7x4
6 lug 2.6
7 cabinet (REAR) assy
2 claw
3 claw
4 claw
• Setting the Pointer
1.Turn the gear (tuning capacitor) in the direction of A until it is stopped.
2.Place the rack as shown in the figure.
3.Mount the pointer.

Put the lead-wire
antenna close to
the set.
AM RF signal
generator
400Hz, 30%
AM modulation
Output level:as low as possible
16 Ω
set
earphone jack (EPJ1)
level mete
r
– 5 – – 6 –
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5 145 kHz
CT1 265 kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 160 kHz
CT2 240 kHz
Adjustment Location: MAIN BOARD
ICF-303L:
LW SECTION
BAND switch : LW
(303L)
(303L)
CT2
LW TRACKING( 303L)
ADJUSTMENT
CT1-1
AM TRACKING (303)
ADJUSTMENT
CT1-4
AM FREQUENCY
COVERAGE (303)
ADJUSTMENT
L2
FM TRACKING
ADJUSTMENT
L4
FM FREQUENCY
COVERAGE
ADJUSTMENT
L5
AM FREQUENCY COVERAGE (303)
LW FREQUENCY COVERAGE (303L
)
ADJUSTMENT
CT1-2
FM TRACKING
ADJUSTMENT
MAIN BOARD (COMPONENT SIDE)
CT1
LW FREQUENCY
COVERAGE (303L)
ADJUSTMENT
CT1-3
FM FREQUENCY
COVERAGE
ADJUSTMENT
L1
AM TRACKING (303)
LW TRACKING (303L)
ADJUSTMENT
16 Ω
set
earphone jack (EPJ1)
level mete
r
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
400Hz, 30%
AM modulation
Output level:as low as possible
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
ICF-303:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4 86.5 (87.35)
<64> MHz
CT1-3 109.5 (108.25) MHz
FMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2 86.5 (87.35)
<68> MHz
CT1-2 109.5 (108.25)
<102> MHz
NOTE :( ) : Italian model
< > : East European model
ICF-303L:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4 86.5 MHz
CT1-3 109.5 MHz
FMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2 86.5 MHz
CT1-2 109.5 MHz
SECTION 3
ELECTRICAL ADJUSTMENTS
FM SECTION
BAND switch : FM
telescopic
antenna terminal
0.01
µ F
FM RF signal
generator
400Hz, 30% FM modulation
frequency deviation
± 22.5kHz
Output level:as low as possible
set
16 Ω
set
earphone jack (EPJ1)
level mete
r
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5 520 (516.5) kHz
CT1-4 1,650 (1,631.5) kHz
AMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 600 (620) kHz
CT1-1 1,400 kHz
NOTE :no mark: ( ) : Italian model
ICF-303:
AM SECTION
BAND switch :AM

ICF-303/303L
– 7 – – 8 –
4-1. PRINTED WIRING BOARD
1
A
B
C
D
E
F
G
2345678910111213
1-638-452- 11
MAIN BOARD
R4
C15
R6
C9
R9
C13
C17
R7
C18
C24
R2
C4 C3
C8
CF1
CT1
LW OSC
C19
C21
C23
C6
R8
C2
R3
J3
R1
J2
J4
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS,3V
C14
C16 C12 C11
C20
S1
(BAND)
LW FM
AM(303)
(303L)
TUNE
303L 303L
LW ANT
CT2 L2 L7
L6
ANT 1
FM TELESCOPIC
ANTENNA
SP 1
SPEAKER
WHT RED
RED
WHT
EPJ1
(EARPHONE)
L4
CF3
C5
303L
303
303L
CT1-2CT1-3 CT1-1CT1-4
30
16
21
25
1
5
15
10
T1
AM IF
CF2
BPF1
IC1
-1 -2
-3
-4
L5
AM OSC(303)
LW OSC(303L)
RV1-2
VOL
RV1-1
RV1
POWER
04
SHIELD PLATE
BLK RED BLU
BLK BLU
BLK
RED
RED
BLU
CLEAR CLEAR
CLEAR
LW FERRITE-ROD ANTENNA(303L)
D3
303L 303L
RF IN(+)
DET OUT
RF IN(-)
B+
GND
FM
ANT WHT
SP(+)
SP( )
CV1
TUNING
L1
BLK REDBLUCLEAR
AM FERRITE-ROD ANTENNA(303)
L1
(303L)
(303)
1
3
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•p: parts mounted on the conductor side.
•¢: internal component.
•b: Pattern from the side which enables seeing.
SECTION 4
DIAGRAMS

4-2. SCHEMATIC DIAGRAM
– 9 – – 10 –
ICF-303/303L
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Total current is measured with power on.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
( ) : AM or LW
• Voltagesare taken with aVOM(Inputimpedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM
• Abbreviation
IT : Italian model
EE : East European model
EA : Saudi Arabia model

2
1
3
13 4
5
67
8
9
10
11
12
27
14 15
16
17
18
19 20
21
22
23
24
25
26
8
ANT1
SP1
D3
not supplied
L1
SECTION 5
EXPLODED VIEW
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories and packing materials are given in
the last of this parts list.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
•Abbreviation
EE : East European model
IT : Italian model
EA : Saudi Arabia model
– 11 – – 12 –
SECTION 6
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
NOTE:
• Due to standardization, replacements in
the parts list may be different from the
parts specified in the diagrams or the
components used on the set.
• RESISTORS
All resistors are in ohms.
METAL:Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F:nonflammable
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example:
uA.. : µA.. uPA.. : µPA..
uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..
• CAPACITORS
uF : µF
• COILS
uH : µH
When indicating parts by reference
number, please include the board.
•Abbreviation
EE : East European model
IT : Italian model
EA : Saudi Arabia model
CND : Cnadian model
AR : Argentina model
AUS:Australian model
CH
TW : :Chinese model Taiwan model
MAIN
1 3-037-044-01 PLATE, TRANSPARENT (303:EXCEPT EE,IT,EA)
1 3-037-044-11 PLATE, TRANSPARENT (IT,EA)
1 3-037-044-21 PLATE, TRANSPARENT (EE)
1 3-037-044-31 PLATE, TRANSPARENT (303L)
2 3-037-046-01 PANEL (SPEAKER) (BLACK)
2 3-037-046-11 PANEL (SPEAKER) (WHITE) (EXCEPT EE)
3 3-037-038-01 CABINET (FRONT) (BLACK)
3 3-037-038-11 CABINET (FRONT) (WHITE) (EXCEPT EE)
4 3-037-045-01 HOLDER, JACK
53-037-043-01 HOLDER, LED
6 3-037-020-01 KNOB (POWER/VOL) (BLACK)
6 3-037-020-11 KNOB (POWER/VOL) (WHITE) (EXCEPT EE)
7 3-037-048-01 TERMINAL (–), BATTERY
8 3-880-990-00 SCREW (1.7X3), FLAT, (+) SPECIAL
*9 A-3663-369-A MAIN BOARD, COMPLETE
(303:EXCEPT EE,IT,EA)
*9 A-3663-372-A MAIN BOARD, COMPLETE (303L)
*9 A-3663-375-A MAIN BOARD, COMPLETE (EE)
*9 A-3663-378-A MAIN BOARD, COMPLETE (IT,EA)
10 3-371-765-21 SCREW (2X8), +BTP
11 3-369-171-01 GEAR (TUNING CAPACITOR)
12 3-037-047-01 TERMINAL (+), BATTERY
13 3-040-693-01 SHEET, SPEAKER (for WHITE)
14 3-037-025-11 POINTER
15 3-369-170-01 RACK
*16 3-037-040-01 CHASSIS
*17 3-037-706-01 PLATE, RACK RETAINER
18 3-037-041-01 KNOB (TUNE) (BLACK)
18 3-037-041-11 KNOB (TUNE) (WHITE) (EXCEPT EE)
19 3-318-203-61 SCREW (B1.7X4), TAPPING
20 7-623-505-01 LUG, 2.6
21 3-037-039-01 CABINET (REAR) (BLACK)
21 3-037-039-11 CABINET (REAR) (WHITE) (EXCEPT EE)
22 3-372-124-01 CUSHION (BATTERY)
23 3-037-024-01 HANDLE (BLACK)
23 3-037-024-11 HANDLE (WHITE) (EXCEPT EE)
24 7-685-136-19 SCREW +P 2.6X12 TYPE2 N-S
25 3-037-034-01 SPRING (HANDLE)
26 3-037-019-01 LID, BATTERY CASE (BLACK)
26 3-037-019-11 LID, BATTERY CASE (WHITE) (EXCEPT EE)
27 3-037-042-01 KNOB (BAND) (BLACK)
27 3-037-042-11 KNOB (BAND) (WHITE) (EXCEPT EE)
ANT1 1-501-247-21 ANTENNA, TELESCOPIC
D3 8-719-069-94 LED TLR124 (TUNE)
L1 1-402-566-11 ANTENNA, FERRITE-ROD (AM) (303)
L1 1-402-567-11 ANTENNA, FERRITE-ROD (LW) (303L)
SP1 1-529-456-11 SPEAKER (6.6cm)
*A-3663-369-A MAIN BOARD, COMPLETE
(303:EXCEPT EE,IT,EA)
*A-3663-372-A MAIN BOARD, COMPLETE (303L)
*A-3663-375-A MAIN BOARD, COMPLETE (EE)
*A-3663-378-A MAIN BOARD, COMPLETE (IT,EA)
**********************
3-037-043-01 HOLDER, LED
< BPF >
BPF1 1-233-452-11 FILTER, BAND PASS (EE)
BPF1 1-236-839-11 FILTER, BAND PASS (EXCEPT EE)
< CAPACITOR >
C2 1-163-091-00 CERAMIC CHIP 8PF 50V
(EE)
C2 1-163-102-00 CERAMIC CHIP 24PF 5% 50V
(EXCEPT EE,IT,EA)
C2 1-163-103-00 CERAMIC CHIP 27PF 5% 50V
(IT,EA)
C3 1-163-096-00 CERAMIC CHIP 13PF 5% 50V
(EE)
C3 1-163-104-00 CERAMIC CHIP 30PF 5% 50V
(IT,EA)
C3 1-163-237-11 CERAMIC CHIP 27PF 5% 50V
(303L)
C3 1-163-713-11 CERAMIC CHIP 27PF 5% 50V
(303:EXCEPT EE,IT,EA)
C4 1-163-091-00 CERAMIC CHIP 8PF 50V
(303)
C4 1-163-122-00 CERAMIC CHIP 160PF 5% 50V
(303L)
C5 1-126-157-11 ELECT 10uF 20% 16V
C6 1-163-021-11 CERAMIC CHIP 0.01uF 10% 50V
C8 1-126-163-11 ELECT 4.7uF 20% 50V
C9 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C11 1-126-163-11 ELECT 4.7uF 20% 50V
C12 1-126-157-11 ELECT 10uF 20% 16V
C13 1-163-021-11 CERAMIC CHIP 0.01uF 10% 50V
(303)
C13 1-163-023-00 CERAMIC CHIP 0.015uF 5% 50V
(303L)
C14 1-162-638-11 CERAMIC CHIP 1uF 16V
C15 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
(303L)
C16 1-126-163-11 ELECT 4.7uF 20% 50V
C17 1-124-434-00 ELECT 220uF 20% 4V
C18 1-162-637-11 CERAMIC CHIP 0.47uF 16V
C19 1-162-637-11 CERAMIC CHIP 0.47uF 16V
C20 1-126-941-11 ELECT 470uF 20% 6.3V
C21 1-162-638-11 CERAMIC CHIP 1uF 16V
(303L)
C23 1-162-638-11 CERAMIC CHIP 1uF 16V
(303L)
C24 1-163-031-11 CERAMIC CHIP 0.01uF 50V
< FILTER >
CF1 1-567-097-61 FILTER, CERAMIC
CF2 1-577-072-11 FILTER, CERAMIC (303)
CF2 1-578-677-11 FILTER, CRYSTAL (303L)
CF3 1-567-097-61 FILTER, CERAMIC
< TRIMMER >
CT1 1-141-245-00 CAP, TRIMMER 30PF (303L)
CT2 1-141-245-00 CAP, TRIMMER 30PF (303L)
< VARIABLE CAPACITOR >
CT1 1-151-659-11 CAP, VARIABLE (EXCEPT EE)
CV1 1-151-659-11 CAP, VARIABLE (TUNING) (EXCEPT EE)
CT1 1-151-659-22 CAP, VARIABLE (EE)
CV1 1-151-659-22 CAP, VARIABLE (TUNING) (EE)
< DIODE >
D3 8-719-069-94 LED TLR124 (TUNE)
< JACK >
EPJ1 1-563-836-21 JACK (v)
< IC >
IC1 8-752-037-02 IC CXA1019S
< JUMPER RESISTOR >
J2 1-216-296-00 SHORT 0
J3 1-216-296-00 SHORT 0
J4 1-216-296-00 SHORT 0
< COIL >
L1 1-402-566-11 ANTENNA, FERRITE-ROD (AM) (303)
L1 1-402-567-11 ANTENNA, FERRITE-ROD (LW) (303L)
L2 1-403-614-11 COIL, AIR-CORE (EE)
*L2 1-422-320-11 COIL, AIR-CORE (EXCEPT EE)
RR
Ver 1.1

– 13 –
Ref. No. Part No. Description Remark
MAIN
L4 1-422-131-00 COIL, FM OSCILLATION (EXCEPT EE,IT,EA)
L4 1-428-241-11 COIL, AIR-CORE (EE)
L4 1-459-954-21 COIL (WITH CORE) (IT,EA)
L5 1-406-028-00 COIL, OSC (MW)
L6 1-410-294-11 INDUCTOR 38uH (303L)
L7 1-412-316-11 INDUCTOR 120uH (303L)
< RESISTOR >
R1 1-216-198-00 RES,CHIP 1K 5% 1/8W
R2 1-216-073-00 METAL CHIP 10K 5% 1/10W
R3 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R4 1-216-041-00 METAL CHIP 470 5% 1/10W
R6 1-216-166-00 RES,CHIP 47 5% 1/8W
R7 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R8 1-216-049-11 RES,CHIP 1K 5% 1/10W
(303)
R8 1-216-295-00 SHORT 0 (303L)
R9 1-216-043-00 RES,CHIP 560 5% 1/10W
(303L)
< VARIABLE RESISTOR >
RV1 1-241-555-11 RES, VAR, CARBON 50K (POWER/VOL)
< SWITCH >
S1 1-552-370-00 SWITCH, SLIDE (BAND)
< TRANSFORMER >
T1 1-404-341-00 TRANSFORMER, IF (303)
T1 1-404-355-00 TRANSFORMER, IF (303L)
*************************************************************
MISCELLANEOUS
***************
ANT1 1-501-247-21 ANTENNA, TELESCOPIC
SP1 1-529-456-11 SPEAKER (6.6cm)
*************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
3-867-126-11 MANUAL, INSTRUCTION (ENGLISH,FRENCH,
GERMAN,SPANISH,DUTCH,ITALIAN,
PORTUGUESE) (CND,AEP,AR,IT)
3-867-126-21 MANUAL, INSTRUCTION (ENGLISH,SWEDISH,
DANISH,FINNISH,POLISH,CZECH,
HUNGARIAN,RUSSIAN) (AEP,EE)
3-867-126-31 MANUAL, INSTRUCTION (ENGLISH,FRENCH,
SPANISH,SIMPLIFIED CHINESE,
ARABIC) (E,EA,AUS,CH)
3-867-126-41 MANUAL, INSTRUCTION (ENGLISH,
TRADITIONAL CHINESE) (TW)
Ver 1.1

REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper on the revised page allows you to jump to the next revised page.
Ver. Date Description of Revision
1.0 1999. 07 New
1.1 2004. 04 Taiwan model Addition.
IDF-303/303L