Sony ICF-C723 - Ic Memory Clock Radio User manual

Ver 1.1
MICROFILM
ICF-C723/C723L
SERVICE MANUAL
ICF-C723
FM/AM PLL SYNTHESIZED CLOCK RADIO
ICF-C723L
FM/MW/LW PLL SYNTHESIZED CLOCK RADIO
SPECIFICATIONS
US Model
Canadian Model
E Model
Australian Model
ICF-C723
UK Model
ICF-C723L
AEP Model
ICF-C723/C723L
Radio section
Frequency range :
US, Canadian model
Band ICF-C723 Channel step
FM 87.5– 108 MHz 0.1MHz
AM 530 – 1,710 kHz 10kHz
EXCEPT US, Canadian model
Band ICF-C723 ICF-C723L Channel step
FM 87.5– 108 MHz 87.5– 108 MHz 0.05MHz*
AM (MW) 531 – 1,602 kHz 530 – 1,602 kHz 9kHz
LW –––––––– 530 – 1,602 kHz 9kHz
* The frequency display is raised or lowerd by steps of
0.1MHz.
(Example : Frequency 88.05 MHz is displayed as “88.0
MHz”.)
DIGITALVOICE MEMO Recording section
Recording media
Built-in flash memory
Recording time
20 seconds
Frequecy response
400Hz – 2,700Hz
General
Time display
US, Canadian, UK model 12-hour
EXCEPT US, Canadian, UK model 24-hour
Speaker Approx. 5.7 cm (2 1/4in) dia.
Power output
100 mW (at 10% harmonic distortion)
Power requirements
US, Canadian model :120VAC, 60Hz
EXCEPT US, Canadian model : 220 – 230VAC, 50Hz
DimensionsApprox. 181 x 103 x 133 mm (w/h/d)
(7 1/4x 4 1/8x 4 1/4in) incl. projecting parts and controls
Mass Approx. 550 g (1 lb 3.4 oz)
Approx. 600 g (1 lb 5.2 oz) : ICF-C723L (UK model)
Design and specifications are subject to change without notice.

– 2 –
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 3
2. DISASSEMBLY
2-1. Cabinet (Upper) Removal........................................... 4
2-2. Microcomputer Board Removal ................................. 4
2-3. Main Board, Key Board, Transformer (Primary)
Board, Transformer (Secondary) Board Removal ...... 5
Installation Power Cord ..................................................... 5
3. ELECTRICAL ADJUSTMENT................................ 6
4. DIAGRAMS
4-1. Explanation of IC Terminal ........................................ 8
4-2. Printed Wiring Board (Microcomputer Section) ........ 9
4-3. Schematic Diagram ((Microcomputer Section).........11
4-4. Printed Wiring Board (Main Section)....................... 13
4-5. Schematic Diagram (Main Section) ......................... 15
5. EXPLODEDVIEW..................................................... 18
6. ELECTRICAL PARTS LIST................................... 19
MODEL NO.
MODEL IDENTIFICATION
– Model Number Portion –
Carved on lower cabinet
ICF-C723
ICF-C723L
US, Canadian model : AC : 120V⁄60Hz 5W
AEP, UK, Italian,
E, Australian model : AC : 220 – 230V⁄50Hz 5W
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety check before releasing the set to the customer :
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part
having a return to chassis, must not exceed 0.5mA (500
microampers).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or
RCA WT-540A. Follow the manufacturers’instructions to
use these instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operatedAC voltmeter. The “limit” indica-
tion is 0.75V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are
examples of a passive VOM that is suitable. Nearly all
battery operated digital multimeters that have a 2V AC range
are suitable. (See Fig. A)
AC
voltmeter
(0.75V)
To Exposed Metal
Parts on Set
Earth Ground
0.15
µ F 1.5k
Ω
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICALTO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
•HOW TO CHANGETHE CERAMIC FILTER
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 package as a spare parts.
mark mark
CF1
CF3
red 10.70MHz
blue 10.67MHz
orange 10.73MHz
black 10.64MHz
white 10.76MHz
Mark Center
frequency

– 3 –
SECTION 1
GENERAL
*
* ICF-C723 : FM, AM
ICF-C723L : FM, MW, LW
LOCATION AND FUNCTION OF CONTROLS

– 4 –
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (UPPER) REMOVAL
2-2. MICROCOMPUTER BOARD REMOVAL
Precision driver
1 Screws +P (3x14)
Claw
2
3
4
Cabinet (Upper)
Cabinet (lower)
3 Claws
1 CN101
2 CN102
4
5
Holder (transformer)
Cabinet (lower)
Microcomputer board

– 5 –
INSTALLATION POWER CORD
2-3. MAIN BOARD, KEY BOARD,TRANSFORMER (PRIMARY) BOARD,
TRANSFORMER (SECONDARY) BOARD, REMOVAL
6 Claw
6 Claw
4 Claw
8 Transformer (primary) board
9 Transformer (secondary) boar
d
4 Claw
4 Claw
1 Screws +P (3x14)
3 CN1
2
5
7
Power transformer (T201)
Shield case (transformer)
Main board
Cabinet (lower)
Key board
power cord power cord
Cabinet (lower) Cabinet (lower)
US model EXCEPT US model

– 6 –
AM Section
Band button : AM (ICF-C723)
: MW or LW (ICF-C723L)
Volume : MAX
FM Section
Band button : FM
Volume : MAX
[MAIN BOARD] (Conductor side)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
( ): AEP, UK, Italian, Australian, E model only
AM IF ALIGNMENT
Adjust for a maximum reading on level meter.
T1 455kHz
AM <MW> FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequecy display Reading on digital
voltmeter
L6 530kHz (531kHz) 2.5 ± 0.1V (ICF-C723)
2.65 ± 0.1V (ICF-C723L)
Less than 11.0V
confirmation 1,710kHz (1,602kHz) Standard 9.5V
(Less than 10.0V)
(Standard 9.0V)
AM <MW> TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 :ICF-C723
L3–1 :ICF-C723L 580kHz (621kHz)
CT1 1,490kHz (1,404kHz)
ICF-C723L
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequecy display Reading on digital
voltmeter
confirmation 153kHz More than 2.2V
(Standard 3V)
CT4 279kHz 9.0 ± 0.1V
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 – 2 162kHz
CT2 243kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequecy display Reading on digital
voltmeter
L5 87.5MHz 3.0 ± 0.1V
confirmation 108.0MHz 10 ± 1V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 87.5MHz
CT3 108MHz
AdjustmentLocation : Main board(Seepage8)
FM RF signal
generator
22.5kHz frequency
deviation by 400Hz signal.
Output level :
as low as possible
set
FM ANT IN
0.01 F
µ
set
8
Ω
speaker terminal
level mete
r
SECTION 3
ELECTRICAL ADJUSTMENTS
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
W705
JW13
C15
C55
1
2
3
4
5
6
digital
voltmeter

– 7 –
Adjustment Location :
ICF-C723
ICF-C723L
L6 : AM Frequency Coverage Adjustment
L5 : FM Frequency Coverage Adjustment
CT1 : AMTracking Adjustment
L4 : FM Tracking Adjustmen
t
CT3 : FM Tracking Adjustment
T1: AM IF Alignment
L3 : AM Tracking Adjustment
[MAIN BOARD]
(Component side)
L6 : MW Frequency Coverage Adjustment
CT4 : LW Frequency Coverage Adjustmen
t
L5 : FM Frequency Coverage Adjustment
CT1 : MW Tracking Adjustment
L3–2 : LW Tracking
Adjustment
L4 : FM Tracking Adjustment
CT3 : FM Tracking Adjustment
T1: AM IF Alignment
L3–1 : MW Tracking Adjustment
CT2 : LW Tracking Adjustment
[MAIN BOARD]
(Component side)

– 8 –
Pin No. Pin name I/O Description
1 INIT O Destination select terminal.
2 PLAY OUT VOL – Not used (Open).
3 POWER O Mute drive output.
4 R MUTE O REC Mute drive output.
5 PLAY O Voice memo play control output.
6 – 9 KS0 – 3 I Key input.
10 – 13 KS0 – 3 I Key input.
14 BAND 1 O FM/AM band select.
15 BAND 2 O MW/LW band select.
16 VAMP I MIC input.
17 REC O Voice memo REC control output.
18 GND – Ground.
19 EO O Tuning voltage control output.
20 VCOL I VCO (MF, HF) input terminal.
21 VCOH I VCO (VHF) input terminal.
22 VREG 1 – Capacitor connect terminal.
23 VDD – Power supply.
24 X OUT O System clock output (75MHz).
25 X IN I System clock input (75MHz).
26 VREG 2 – Capacitor connect terminal.
27 VLCD 0 I LCD drive device voltage input.
28 CAP 0 – Capacitor connect terminal.
29 CAP 1 – Capacitor connect terminal.
30 LCD 1 I LCD drive device voltage input.
31 – 34 COM 0 – 3 O LCD common output.
35 – 48 LCD 0 – 13 O LCD segment output.
49 LCD14 – Not used (Open).
50 CF I Chip enable input.
51 INT – Not used (Fixed at “L”).
52 BEEP O Beep signal output.
53 EON IN I REC signal input.
54 PB 1 I Destination select terminal.
55 PB 2 I Destination select terminal.
56 PB 3 I Destination select terminal.
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF ICTERMINALS
IC101 µPD17071GB-522-1A7 (SYSTEM CONTROL)

– 11 – – 12 –
ICF-C723/C723L
4-3. SCHEMATIC DIAGRAM (MICROCOMPUTER SECTION)
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.
•U: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : RADIO SECTION : FM,
VOICE MEMO SECTION : PLAY
( ) : RADIO SECTION : AM (MW),
VOICE MEMO SECTION : REC
• Voltages are takenwithaVOM(Inputimpedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Abbreviation
AUS : Australian
IT : Italian
1
IC101 @¢ XOUT
rWAVEFORM
1.8Vp-p
75kHz
VOLT/DIV : 0.5VAC
TIME/DIV : 5 µsec

– 15 – – 16 –
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.
Note: Note:
The components identi- Les composants identifiés
fied by mark !or dotted par une marque !sont cri-
line with mark !are cri- tiques pour la sécurité.
tical for safety. Ne les remplacer que par
Replace only with part une piéce portant le
number specified. numéro spécifié.
•U: B+ Line.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : RADIO SECTION : FM,
VOICE MEMO SECTION : PLAY
( ) : RADIO SECTION : AM (MW),
VOICE MEMO SECTION : REC
<>:LW
• Voltages are takenwitha VOM (Input impedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM
• Abbreviation
AUS : Australian
IT : Italian
4-5. SCHEMATIC DIAGRAM (MAIN SECTION) ICF-C723/C723L
rRefer to page 17 for IC Block Diagram.

– 17 – – 18 –
SECTION 5
EXPLODED VIEW
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• 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
AUS : Australian IT : Italian
Les composants identifiés par une
marque !sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
Thecomponents identified bymark !
ordottedlinewithmark !are critical
forsafety.
Replaceonlywithpartnumberspecified.
1 3-019-347-01 BUTTON (MAIN)
2 3-019-353-01 BUTTON (DST)
3 3-019-351-01 BUTTON (REC)
4 3-019-352-01 BUTTON (PLAY)
5 3-019-344-01 CABINET (UPPER)
6 3-019-348-01 BUTTON (SNOOZE)
*7 3-019-357-01 CASE (LCD), SHIELD
8 3-019-350-01 REFLECTOR
9 3-019-360-01 CUSHION (MICROPHONE)
*10 A-3679-953-A MAIN BOARD, COMPLETE (C723:US,Canadian)
*10 A-3679-958-A MAIN BOARD, COMPLETE (C723:AEP,IT,E)
*10 A-3679-959-A MAIN BOARD, COMPLETE (C723:AUS)
*10 A-3679-961-A MAIN BOARD, COMPLETE (C723L:AEP)
10 A-3679-962-A MAIN BOARD, COMPLETE (C723L:UK)
11 3-019-346-01 HOLDER (TRANSFORMER)
12 3-019-359-01 SPACER (MICROPHONE)
13 3-382-175-21 KNOB (V)
!14 1-555-795-00 CORD, POWER (C723:AEP,IT,E/ C723L:AEP)
!14 1-696-572-21 CORD, POWER (C723L:UK)
!14 1-765-458-11 CORD, POWER (C723:AUS)
!14 1-769-339-22 CORD, POWER (C723:US,Canadian)
15 1-667-904-11 TRANSFORMER (PRIMARY) BOARD
16 1-667-905-11 TRANSFORMER (SECONDARY) BOARD
17 3-019-345-01 CABINET (LOWER) (C723:US,Canadian)
17 3-019-345-11 CABINET (LOWER) (C723:AEP,IT,AUS,E)
17 3-019-345-21 CABINET (LOWER) (C723L)
18 3-368-852-01 FOOT
19 2-532-810-00 CUSHION, 15X5X0.3
20 3-025-194-01 SHEET, BARREL
21 3-023-340-01 SHEET, BLIND
22 3-019-361-01 SHEET, ADHESIVE
23 3-019-349-01 PLATE, TRANSPARENT (C723)
23 3-019-349-11 PLATE, TRANSPARENT (C723L)
24 7-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT
ANT1 1-501-907-21 ANTENNA, FM WIRE
ECM101 1-542-168-11 MICROPHONE, ELECTRET CONDENSER
SP1 1-544-517-11 SPEAKER
!T201 1-450-922-11 TRANSFORMER, POWER (C723:US,Canadian)
!T201 1-450-923-31 TRANSFORMER, POWER
(C723:AEP,IT,AUS,E/ C723L)
LCD101 1-801-989-11 DISPLAY PANEL, LIQUID CRYSTAL
24 24
LCD
101
T201
ANT1
4 C
4 B
ECM101
SP1
24
1
2
3
4
5
6
23
22
8
7
10
11
12
13 14
US, Canadian mode
l
AUS model
UK model
AEP, IT, E model
4 B(including
4 A, B, C)
18
17
19
16
15
not supplied
20
21
914
14
14
4 A : MICROCOMPUTER board
4 B : MAIN board
4 C : KEY board
IC1 CXA1019M
rIC BLOCK DIAGRAM
FM FE
TUNING METER
AM IF DET AGC
AF POWER AMP
FM IF
FM/AM IF OUT FM RF IN FE GND
NC
AM RF IN FM RF FM OSC REG OUT AFC AM OSC NF VOL FM DISCRI GND
FM/AM BAND
SELECT
FM IF IN
AM IF IN
NC
METER
IF GND
DET OUT
AFC AGC
AFC AGC
AF IN
RIPPLE FILTER
AF OUT
VCC
GND
AM FE
FM
DISCRIMINATOR
14 13 12 11 10 9 8 7 2 16 5 34
15 16 17 18 19 20 21 22 23 24 25 26 27 28

– 19 –
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.
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• 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
• Abbreviation
AUS : Australian IT : Italian
Les composants identifiés par une
marque!sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
When indicating parts by reference num-
ber, please include the board.
Thecomponentsidentifiedbymark !
ordottedlinewithmark !arecritical
forsafety.
Replaceonlywithpartnumberspecified.
SECTION 6
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
*A-3679-953-A MAIN BOARD, COMPLETE (C723:US,Canadian)
*A-3679-958-A MAIN BOARD, COMPLETE (C723:AEP,IT,E)
*A-3679-959-A MAIN BOARD, COMPLETE (C723:AUS)
*A-3679-961-A MAIN BOARD, COMPLETE (C723L:AEP)
*A-3679-962-A MAIN BOARD, COMPLETE (C723L:UK)
*********************
1-501-907-21 ANTENNA, FM WIRE
3-019-350-01 REFLECTOR
*3-019-357-01 CASE (LCD), SHIELD
3-019-359-01 SPACER (MICROPHONE)
KEY BOARD
**********
S201 1-554-303-21 SWITCH, TACTILE (SNOOZE/DATE/SLEEP OFF)
************************************************************
MAIN BOARD
***********
< CAPACITOR >
C1 1-163-235-11 CERAMIC CHIP 22PF 5% 50V
C2 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C3 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C4 1-163-231-11 CERAMIC CHIP 15PF 5% 50V
C5 1-163-231-11 CERAMIC CHIP 15PF 5% 50V
C6 1-163-133-00 CERAMIC CHIP 470PF 5% 50V
(C723L)
C7 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C8 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C9 1-163-222-11 CERAMIC CHIP 5PF 0.25PF 50V
C10 1-163-085-00 CERAMIC CHIP 2PF 50V
C11 1-164-232-11 CERAMIC CHIP 0.01uF 50V
C12 1-163-132-00 CERAMIC CHIP 430PF 5% 50V
C13 1-163-096-00 CERAMIC CHIP 13PF 5% 50V
(C723)
C13 1-163-099-00 CERAMIC CHIP 18PF 5% 50V
(C723L)
C14 1-163-129-00 CERAMIC CHIP 330PF 5% 50V
(C723L)
C15 1-164-232-11 CERAMIC CHIP 0.01uF 50V
C16 1-163-059-11 CERAMIC CHIP 0.01uF 10% 50V
C17 1-126-964-11 ELECT 10uF 20% 50V
C18 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C20 1-126-963-11 ELECT 4.7uF 20% 50V
C21 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
(C723L)
C22 1-164-232-11 CERAMIC CHIP 0.01uF 50V
C23 1-126-963-11 ELECT 4.7uF 20% 50V
C24 1-126-964-11 ELECT 10uF 20% 50V
C25 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V
C26 1-163-809-11 CERAMIC CHIP 0.047uF 10% 25V
C27 1-163-809-11 CERAMIC CHIP 0.047uF 10% 25V
(C723L)
C28 1-128-551-11 ELECT 22uF 20% 25V
C29 1-126-926-11 ELECT 1000uF 20% 10V
C30 1-164-346-11 CERAMIC CHIP 1uF 16V
C31 1-164-346-11 CERAMIC CHIP 1uF 16V
C32 1-126-925-11 ELECT 470uF 20% 10V
C34 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C35 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C36 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C37 1-126-925-11 ELECT 470uF 20% 10V
C38 1-126-926-11 ELECT 1000uF 20% 10V
C39 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C40 1-126-925-11 ELECT 470uF 20% 10V
C41 1-126-934-11 ELECT 220uF 20% 10V
C42 1-104-666-11 ELECT 220uF 20% 25V
C50 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
(C723L)
C51 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C52 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C53 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C54 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C55 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C56 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
< FILTER >
CF1 1-579-632-41 FILTER, CERAMIC
*CF2 1-577-319-11 FILTER, CERAMIC (C723/C723L:UK)
CF2 1-578-677-21 FILTER, CRYSTAL (C723L:AEP)
CF3 1-579-632-41 FILTER, CERAMIC
< CONNECTOR >
*CN1 1-568-270-11 SOCKET, CONNECTOR 4P
MAINKEY

– 20 –
< TRIMMER >
CT1 1-141-304-21 CAP, TRIMMER 10PF
CT2 1-141-444-11 CAP, CERAMIC TRIMMER 50PF (C723L)
CT3 1-141-304-21 CAP, TRIMMER 10PF
CT4 1-141-444-11 CAP, CERAMIC TRIMMER 50PF (C723L)
< DIODE >
D3 8-719-951-05 DIODE KV1560 (C723)
D3 8-719-023-99 DIODE KV1563M-3 (C723L)
D4 8-713-100-11 DIODE 1T362
D5 8-713-100-11 DIODE 1T362
D6 8-719-911-19 DIODE 1SS119
D7 8-719-052-88 DIODE 1N4002
D8 8-719-052-88 DIODE 1N4002
D9 8-719-109-89 DIODE RD5.6ESB2
< IC >
IC1 8-752-050-16 IC CXA1019M
< JUMPER REGISTOR >
JC1 1-216-296-00 METAL CHIP 0 5% 1/8W
JC2 1-216-296-00 METAL CHIP 0 5% 1/8W
JC3 1-216-295-00 METAL CHIP 0 5% 1/10W
JC4 1-216-295-00 METAL CHIP 0 5% 1/10W
JC6 1-216-296-00 METAL CHIP 0 5% 1/8W
JC7 1-216-295-00 METAL CHIP 0 5% 1/10W
JC8 1-216-295-00 METAL CHIP 0 5% 1/10W
JC9 1-216-295-00 METAL CHIP 0 5% 1/10W
< COIL >
L3 1-402-616-11 ANTENNA, FERRITE-ROD (MW)
(C723/C723L:UK)
L3 1-501-975-11 ANTENNA, FERRITE-ROD (LW/MW)
(C723L:AEP)
L4 1-406-545-11 COIL, AIR-CORE
L5 1-416-459-11 COIL, AIR-CORE
L6 1-406-485-11 COIL (OSC)
L9 1-414-170-11 INDUCTOR CHIP 100uH
< TRANSISTOR >
Q1 8-729-102-07 TRANSISTOR 2SC2223-F13 (C723L)
Q2 8-729-102-07 TRANSISTOR 2SC2223-F13
Q3 8-729-120-28 TRANSISTOR 2SC1623-L5L6 (C723L)
Q4 8-729-027-39 TRANSISTOR DTA144TKA-T146
Q5 8-729-027-60 TRANSISTOR DTC144TKA-T146
Q6 8-729-027-60 TRANSISTOR DTC144TKA-T146 (C723L)
Q7 8-729-011-92 TRANSISTOR 2SC2001TP-K1K2
Q8 8-729-011-92 TRANSISTOR 2SC2001TP-K1K2
< RESISTOR >
R1 1-216-133-00 RES,CHIP 3.3M 5% 1/10W
(C723L)
R2 1-216-073-00 METAL CHIP 10K 5% 1/10W
(C723L)
R3 1-216-097-11 RES,CHIP 100K 5% 1/10W
R4 1-216-097-11 RES,CHIP 100K 5% 1/10W
R5 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
(C723:US,Canadian)
R5 1-216-065-11 RES,CHIP 4.7K 5% 1/10W
(C723:AEP,IT,AUS,E,C723L)
R6 1-216-085-00 METAL CHIP 33K 5% 1/10W
R7 1-216-017-11 RES,CHIP 47 5% 1/10W
(EXCEPT US, Canadian)
R7 1-216-021-11 RES,CHIP 68 5% 1/10W
(US, Canadian)
R8 1-216-121-11 RES,CHIP 1M 5% 1/10W
R9 1-216-073-00 METAL CHIP 10K 5% 1/10W
R10 1-216-049-11 RES,CHIP 1K 5% 1/10W
R11 1-216-295-00 METAL CHIP 0 5% 1/10W
R12 1-216-069-00 METAL CHIP 6.8K 5% 1/10W
R13 1-216-065-11 RES,CHIP 4.7K 5% 1/10W
(C723L)
R14 1-216-049-11 RES,CHIP 1K 5% 1/10W
R15 1-216-017-11 RES,CHIP 47 5% 1/10W
R16 1-216-037-00 METAL CHIP 330 5% 1/10W
R17 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
(C723L)
R17 1-216-065-11 RES,CHIP 4.7K 5% 1/10W
(C723)
R18 1-249-401-11 CARBON 47 5% 1/4W
R19 1-216-033-00 METAL CHIP 220 5% 1/10W
R20 1-216-049-11 RES,CHIP 1K 5% 1/10W
R21 1-216-049-11 RES,CHIP 1K 5% 1/10W
R22 1-216-033-00 METAL CHIP 220 5% 1/10W
< VARIABLE RESISTOR >
RV1 1-225-441-41 RES, VAR, CARBON 50K (∑VOLUME)
< TRANSFORMER >
T1 1-404-790-11 TRANSFORMER, IF (C723/C723L:UK)
T1 1-404-902-21 TRANSFORMER, IF (C723L:AEP)
************************************************************
MICROCOMPUTER BOARD
**********************
< CAPACITOR >
C101 1-126-964-11 ELECT 10uF 20% 50V
C102 1-125-691-11 DOUBLE LAYER 0.022F 0 5.5V
C103 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C104 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C105 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C106 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C107 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C108 1-163-133-00 CERAMIC CHIP 470PF 5% 50V
C109 1-163-133-00 CERAMIC CHIP 470PF 5% 50V
C110 1-163-133-00 CERAMIC CHIP 470PF 5% 50V
C111 1-163-133-00 CERAMIC CHIP 470PF 5% 50V
C114 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C115 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C116 1-164-506-11 CERAMIC CHIP 4.7uF 16V
C117 1-163-038-11 CERAMIC CHIP 0.1uF 25V
C118 1-163-108-00 CERAMIC CHIP 43PF 5% 50V
C119 1-163-099-00 CERAMIC CHIP 18PF 5% 50V
C120 1-163-038-11 CERAMIC CHIP 0.1uF 25V
C121 1-163-038-11 CERAMIC CHIP 0.1uF 25V
C122 1-163-031-11 CERAMIC CHIP 0.01uF 50V
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN MICROCOMPUTER

– 21 –
C123 1-163-038-11 CERAMIC CHIP 0.1uF 25V
C124 1-164-232-11 CERAMIC CHIP 0.01uF 50V
C125 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V
C126 1-110-501-11 CERAMIC CHIP 0.33uF 10% 16V
C127 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C128 1-164-232-11 CERAMIC CHIP 0.01uF 50V
C129 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C130 1-126-514-11 ELECT 22uF 20% 10V
C131 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C132 1-163-035-00 CERAMIC CHIP 0.047uF 50V
C133 1-163-035-00 CERAMIC CHIP 0.047uF 50V
C134 1-164-506-11 CERAMIC CHIP 4.7uF 16V
C135 1-164-005-11 CERAMIC CHIP 0.47uF 25V
C136 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C137 1-164-346-11 CERAMIC CHIP 1uF 16V
C138 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C140 1-164-346-11 CERAMIC CHIP 1uF 16V
C141 1-163-031-11 CERAMIC CHIP 0.01uF 50V
(US, Canadian)
C142 1-163-031-11 CERAMIC CHIP 0.01uF 50V
(US, Canadian)
C150 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C154 1-163-038-11 CERAMIC CHIP 0.1uF 25V
< CONNECTOR >
*CN101 1-695-108-11 PIN, CONNECTOR (PC BOARD) 6P
*CN102 1-580-187-11 SOCKET, CONNECTOR 8P
< DIODE >
D101 8-719-911-19 DIODE 1SS119
D102 8-719-950-41 LED GL-3EG43 (LCD BACK-LIGHT)
D103 8-719-950-41 LED GL-3EG43 (LCD BACK-LIGHT)
D104 8-719-950-41 LED GL-3EG43 (LCD BACK-LIGHT)
< MIC >
ECM101 1-542-168-11 MICROPHONE, ELECTRET CONDENSER
< IC >
IC101 8-759-498-29 IC uPD17071GB-522-1A7
IC102 8-759-525-01 IC ISD1420S-RC2015
< JUMPER REGISTOR >
JC101 1-216-295-00 METAL CHIP 0 5% 1/10W
(C723L:UK)
JC102 1-216-295-00 METAL CHIP 0 5% 1/10W
(AEP,IT,E)
JC103 1-216-295-00 METAL CHIP 0 5% 1/10W
(C723:AUS/C723L:AEP)
JC104 1-216-295-00 METAL CHIP 0 5% 1/10W
(C723:US,Canadian,AEP,IT,E/C723L:UK)
JC105 1-216-295-00 METAL CHIP 0 5% 1/10W
(US,Canadian,AUS,UK)
JC106 1-216-295-00 METAL CHIP 0 5% 1/10W
(EXCEPT UK)
JC107 1-216-296-00 METAL CHIP 0 5% 1/8W
JC108 1-216-295-00 METAL CHIP 0 5% 1/10W
JC109 1-216-296-00 METAL CHIP 0 5% 1/8W
JC110 1-216-296-00 METAL CHIP 0 5% 1/8W
JC111 1-216-296-00 METAL CHIP 0 5% 1/8W
JC112 1-216-295-00 METAL CHIP 0 5% 1/10W
JC113 1-216-296-00 METAL CHIP 0 5% 1/8W
JC114 1-216-296-00 METAL CHIP 0 5% 1/8W
JC115 1-216-296-00 METAL CHIP 0 5% 1/8W
JC117 1-216-296-00 METAL CHIP 0 5% 1/8W
JC118 1-216-296-00 METAL CHIP 0 5% 1/8W
JC120 1-216-296-00 METAL CHIP 0 5% 1/8W
JC121 1-216-296-00 METAL CHIP 0 5% 1/8W
JC125 1-216-296-00 METAL CHIP 0 5% 1/8W
JC126 1-216-296-00 METAL CHIP 0 5% 1/8W
JC127 1-216-296-00 METAL CHIP 0 5% 1/8W
JC128 1-216-296-00 METAL CHIP 0 5% 1/8W
JC141 1-216-295-00 METAL CHIP 0 5% 1/10W
JC142 1-216-295-00 METAL CHIP 0 5% 1/10W
JC143 1-216-296-00 METAL CHIP 0 5% 1/8W
JC144 1-216-295-00 METAL CHIP 0 5% 1/10W
JC145 1-216-296-00 METAL CHIP 0 5% 1/8W
JC146 1-216-296-00 METAL CHIP 0 5% 1/8W
JC147 1-216-296-00 METAL CHIP 0 5% 1/8W
< COIL >
L101 1-410-658-31 INDUCTOR CHIP 220uH
< LIQUID CRYSTAL DISPLAY >
LCD101 1-801-989-11 DISPLAY PANEL, LIQUID CRYSTAL
< TRANSISTOR >
Q101 8-729-120-28 TRANSISTOR 2SC1623-L5L6
Q103 8-729-120-28 TRANSISTOR 2SC1623-L5L6
Q104 8-729-027-38 TRANSISTOR DTA144EKA-T146
Q105 8-729-120-28 TRANSISTOR 2SC1623-L5L6
Q106 8-729-120-28 TRANSISTOR 2SC1623-L5L6
Q107 8-729-027-60 TRANSISTOR DTC144TKA-T146
Q108 8-729-027-60 TRANSISTOR DTC144TKA-T146
Q110 8-729-216-22 TRANSISTOR 2SA1162-G
(C723:US,Canadian)
Q110 8-729-141-48 TRANSISTOR 2SB624-BV345
(C723:AEP,IT,AUS,E/ C723L)
< RESISTOR >
R101 1-216-049-11 RES,CHIP 1K 5% 1/10W
R102 1-216-073-00 METAL CHIP 10K 5% 1/10W
R103 1-216-073-00 METAL CHIP 10K 5% 1/10W
R104 1-216-089-11 RES,CHIP 47K 5% 1/10W
R105 1-216-073-00 METAL CHIP 10K 5% 1/10W
R106 1-216-073-00 METAL CHIP 10K 5% 1/10W
R107 1-216-073-00 METAL CHIP 10K 5% 1/10W
R108 1-216-073-00 METAL CHIP 10K 5% 1/10W
R109 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R110 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R111 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R112 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R113 1-216-073-00 METAL CHIP 10K 5% 1/10W
R114 1-216-073-00 METAL CHIP 10K 5% 1/10W
(C723L)
R118 1-216-073-00 METAL CHIP 10K 5% 1/10W
R119 1-216-073-00 METAL CHIP 10K 5% 1/10W
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MICROCOMPUTER

– 22 –
R120 1-216-073-00 METAL CHIP 10K 5% 1/10W
R122 1-216-073-00 METAL CHIP 10K 5% 1/10W
R124 1-216-097-11 RES,CHIP 100K 5% 1/10W
R125 1-216-089-11 RES,CHIP 47K 5% 1/10W
R126 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R127 1-216-073-00 METAL CHIP 10K 5% 1/10W
R128 1-216-073-00 METAL CHIP 10K 5% 1/10W
R129 1-216-097-11 RES,CHIP 100K 5% 1/10W
R130 1-216-073-00 METAL CHIP 10K 5% 1/10W
R132 1-216-077-00 METAL CHIP 15K 5% 1/10W
R133 1-216-077-00 METAL CHIP 15K 5% 1/10W
R134 1-216-097-11 RES,CHIP 100K 5% 1/10W
R135 1-216-097-11 RES,CHIP 100K 5% 1/10W
R136 1-216-109-00 METAL CHIP 330K 5% 1/10W
R137 1-216-105-11 RES,CHIP 220K 5% 1/10W
R138 1-216-097-11 RES,CHIP 100K 5% 1/10W
R139 1-216-113-00 METAL CHIP 470K 5% 1/10W
R142 1-216-029-00 METAL CHIP 150 5% 1/10W
R143 1-216-029-00 METAL CHIP 150 5% 1/10W
R144 1-216-029-00 METAL CHIP 150 5% 1/10W
R145 1-216-025-11 RES,CHIP 100 5% 1/10W
R150 1-216-081-00 METAL CHIP 22K 5% 1/10W
R151 1-216-073-00 METAL CHIP 10K 5% 1/10W
R152 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R153 1-216-025-11 RES,CHIP 100 5% 1/10W
R154 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R156 1-216-065-11 RES,CHIP 4.7K 5% 1/10W
< SWITCH >
S101 1-554-303-21 SWITCH, TACTILE (RADIO OFF ALARM RESET)
S102 1-554-303-21 SWITCH, TACTILE (D.S.T. SUMMER T.)
S103 1-554-303-21 SWITCH, TACTILE (WAKE UP MEMO)
S104 1-554-303-21 SWITCH, TACTILE (1)
S105 1-554-303-21 SWITCH, TACTILE (2)
S106 1-554-303-21 SWITCH, TACTILE (3)
S107 1-554-303-21 SWITCH, TACTILE (4)
S108 1-554-303-21 SWITCH, TACTILE (5)
S109 1-554-303-21 SWITCH, TACTILE (TUNE/TIME SET +)
S110 1-554-303-21 SWITCH, TACTILE (TUNE/TIME SET –)
S111 1-554-303-21 SWITCH, TACTILE (BAND)
S112 1-554-303-21 SWITCH, TACTILE (RADIO ON SLEEP)
S113 1-554-303-21 SWITCH, TACTILE (REC)
S114 1-554-303-21 SWITCH, TACTILE (PLAY)
S115 1-554-303-21 SWITCH, TACTILE (CLOCK)
S116 1-571-850-91 SWITCH, SLIDE (BRIGHTNESS)
< VIBRATOR >
X101 1-767-517-11 VIBRATOR, CRYSTAL (75kHz)
************************************************************
1-667-904-11 TRANSFORMER (PRIMARY) BOARD
******************************
************************************************************
1-667-905-11 TRANSFORMER (SECONDARY) BOARD
********************************
************************************************************
MISCELLANEOUS
**************
!14 1-555-795-00 CORD, POWER (C723:AEP,IT,E/C723L:AEP)
!14 1-696-572-21 CORD, POWER (C723L:UK)
!14 1-765-458-11 CORD, POWER (C723:AUS)
!14 1-769-339-22 CORD, POWER (C723:US,Canadian)
ANT1 1-501-907-21 ANTENNA, FM WIRE
ECM101 1-542-168-11 MICROPHONE, ELECTRET CONDENSER
LCD101 1-801-989-11 DISPLAY PANEL, LIQUID CRYSTAL
SP1 1-544-517-11 SPEAKER
!T201 1-450-922-11 TRANSFORMER, POWER (C723:US,Canadian)
!T201 1-450-923-31 TRANSFORMER, POWER
(C723:AEP,IT,AUS,E/ C723L)
************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
3-861-715-11 MANUAL, INSTRUCTION
(ENGLISH, FRENCH, GERMAN, DUTCH)
(C723:Canadian,AEP,AUS/ C723L)
3-861-715-21 MANUAL, INSTRUCTION (ENGLISH)
(C723:US)
3-861-715-31 MANUAL, INSTRUCTION
(SPANISH, PORTUGUESE, SWEDISH, FINNISH)
(C723:AEP)
3-861-715-41 MANUAL, INSTRUCTION
(ENGLISH, ITALIAN, SPANISH, CHINESE)
(C723:IT,E/C723L:AEP)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
Thecomponentsidentifiedby
mark !ordottedlinewithmark
!arecriticalforsafety.
Replaceonlywithpartnumber
specified.
Lescomposantsidentifiésparune
marque !sontcritiquespour
lasécurité.
Nelesremplacerqueparunepièce
portantlenumérospécifié.
ICF-C723/C723L
9-925-912-11 Sony Corporation
Personal & Mobile Communication Company
98B0284-1
Printed in Japan © 1998.2
Published by Quality Assurance Dept.
MICROCOMPUTER TRANSFORMER (PRIMARY)
TRANSFORMER (SECONDARY)