Sony ICF-C730 User manual

US Model
Canadian Model
AEP Model
E Model
Australian Model
SPECIFICATIONS
Radio section
Frequency range
US, CND, PA model
AEP, E, AUS model
IT model
87.6—108 MHz
87,.6—107.5MHz | 531~-1,602kHz
87.5—108MHz 526.5—1,606,.5 kHz
Antennas FM: FM wire antenna
AM: Built-in ferrite bar antenna
Speaker Approx. 6.6 cm (25/s inches) dia.
Power output 200 mW (at 10% harmonic distortion)
Output Earphone jack (mini jack)
120 V AC, 60 Hz (US, CND, PA model)
220 V AC, 50 Hz (AEP, IT, E model)
240 V AC, 50 Hz (AUS model)
For the power backup function: 9V DC, one
6F22 battery
Power requirements
Battery
life
Approx.
80
hours,
using
Sony
battery
S-O06P
(U)
Dimensions
Approx.
251
x
71
x
158
mm
(w/h/d)
(10 x 27/8 x 61/4 inches)
incl. projecting parts and controls
Weight Approx. 750 g (12 oz) not incl. battery
Design and specifications subject to change without notice.
US, CND, AUS, PA model
12-hours system
AEP, E, IT model
24-hour system
0:00
12:00
AM 12:00 =
PM 12:00
midnight
noon
midnight
noon
FEATURES
°
Dual
alarm
FM/AM
2-band
radio
combined
with
an
electric
digital
alarm
clock
and
sleep
timer.
e
Choice
of
awakening
to
radio
alarm,
buzzer
alarm,
or
dual
alarm:
Alarm
A
(radio)
and
B
(buzzer).
e
24-hour
alarm
preset
system
automatically
turns
alarm
on
at same time each day.
e DREAM BAR SNOOZE/SLEEP OFF (US, CND, PA model),
REPEAT ALARM/SLEEP OFF (AEP, E, IT, AUS model),
operable with a feather-light touch, offers functions; snooze
alarm and sleep timer turn off.
e
You
can
preset
3
FM
stations
for
easier
tuning,
e For private listening, this radio is equipped with an
earphone jack.
CND model: Canadian model
IT model: Italian model
AUS model: Australian model
PA model: Panama model

ICF-C730
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 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The ‘“‘limit”’ indication is 0.75 V, 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 2 V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
1,
A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these instru-
ments.
A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
' this job.
AC
voltmeter
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
PLP PPP PPP PPD PPP PDB PEP P BD DPD BBB DBD BPD DDO DBD DODD EDO DD ODP PDP ODP ODP ODO DODD ODD
MODEL IDENTIFICATION
— Model Number Label —
Carved on lower cabinet: US, CND, AEP, E, IT, PA model (MADE IN TAIWAN)
US, CND, AEP, IT model (MADE IN JAPAN)
and AUS model (MADE IN TAIWAN)
Model number label:
SONY,
FM/AM 2BANDS
mooet. NO. [CF-C730
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS
IDENTIFIED
BY
MARK
A
OR
DOTTED
LINE
WITH
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
PUB-
LISHED
BY
SONY.
MADE IN JAPAN:
MADE
IN
TAIWAN:
US,
CND,
AEP,
E,
IT,
AUS,
PA
model!
CND model: Canadian model
IT model: Italian model
AUS model: Australian model
PA model: Panama model
US, CND, PA model: AC: 120V 60Hz 5W
AEP, E, IT model:
AUS model:
AC: 220V~50Hz 5W
AC: 240V~50Hz 5W
US, CND, AEP, IT model
3-903-114-01: US, CND model (MADE IN JAPAN)
3-903-115-01: AEP, IT model (MADE IN JAPAN)
3-902-766-01: AUS model (MADE IN TAIWAN)
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
A
LA
SECURITE!
LES
COMPOSANTS
IDENTIFIES
PAR
UNE
MARQUE
/\
SUR
LES
DIAGRAMMES
SCHEMATIQUES
ET
LA
LISTE
DES
PIECES
SONT
CRITIQUES
POUR
LA
SECURITE
DE
FONCTIONNEMENT.
NE
REMPLACER
CES
COM.
POSANTS
QUE
PAR
DES
PIECES
SONY
DONT
LES
NUMEROS
SONT
DONNES
DANS
CE
MANUEL
OU
DANS
LES
SUPPLEMENTS
PUBLIES
PAR
SONY.
—2?—

| ICF-C730
SECTION 1
GENERAL
1-1. LOCATION OF CONTROLS
[1] TIME SET buttons (H/M) (rear) Bottom
[2] ALARM set buttons ((A] RADIO, Power backup battery
BUZZER) compartment
[3] CLOCK set button (rear) AC power cord
[4] Earphone jack (side) 20] FM wire antenna
[5] Speaker
[6] Time display
[7] Function selector switch
(OFF, SINGLE ALARM
[AIRADIO), [BIBUZZER], DUAL
ALARM [A/RADIO/B[BUZZER))
[8] DREAM BAR SNOOZE/SLEEP OFF bar (US, CND, PA model)
REPEAT ALARM/SLEEP OFF bar (AEP, E, IT, AUS model)
[91 SLEEP button
10] ALARM RESET/rapIo OFF
button
[11] Dial scale
(12] FM PRESET tuning controls
(rear) (FM 1/FM 2/FM 3)
113] TUNING control
[14] BAND selector switch (FM/AM)
[15] MANUAL (rapio ON) button
(WAKE UP STATION)
(16] VOL (volume) control
(17| FM preset (RADIO ON) buttons
(recall buttons) (FM1/FM2/FM3)
_How to Preset
You can preset up to 3 FM stations (one station for each FM
1, FM 2 and FM 3 buttons).
1 Press FM 1 button.
2 Turn a tittle to get sound.
3 Tune in the desired FM station with the use of FM 1
preset tuning control.
The station is now preset.
4 Ajust volume.
Preset on FM 2 and FM 3 in the same way.
Note:
No frequencies indicators appear on the display.
To change the preset station
Preset a new station on a desired button.
{To Tune in a Preset Station ==]
The desired FM stations will be received simply by pressing
FM 1, FM 2, and FM 3 buttons after presetting. You do not
need to press the MANUAL button or select the band.
To turn off the radio, press the ALARM RESET/ranio OFF
button.
For private listening, connect an earphone to the earphone jack.

ICF-C730
How to Set the Clock
1 Connect the AC power cord to a wail outlet.
Figures will appear and begin to blink.
2 Adjust the clock to the current time with the TIME SET
buttons, H (hour) and M (minute), while holding down
the CLOCK set button.
US, CND, AUS, PA model AEP, E, !1T model
12-hours system 24-hour system
AM 12:00 = midnight
PM 12:00 = noon
0:00 = midnight
12:00 = noon
The hour and minute digits advance independently. The
minute digits return to ‘‘00' after reaching “59”.
Zero second adjustment
Example: To set to 8:15 AM (12-hours system)
1 Adjust the time to 8:14 AM as previously described.
2 Press CLOCK set button and M button simultaneously with
the radio or telephone time signal, and then release.
To advance the minute digits rapidly
Press the H and the M button continuously while holding
down the CLOCK set button.
How to Use the Sleep Timer
You can fall asleep to the radio sound knowing that the radio
will turn itself off after the preset time period has elapsed.
1 Tune in the desired station after pushing the MANUAL
button.
Or select the stationby pressing the FM 1, FM 2 or FM 3
button,
2 Adjust volume.
3 Press the SLEEP button to set the sleep timer
operation time.
The radio will be turned on for 59
minutes.
Keep the SLEEP button pressed
to reduce the time sequence by
one minute.
‘ { DREAM BAR SNOOZE/SLEEP OFF (US, CND, PA model)
To turn off the radio before the preset time elapses, REPEAT ALARM/SLEEP OFF (AEP, E, IT, AUS model)
How to Set the Alarm
press the DREAM BAR SNOOZE/SLEEP OFF bar* (which
cancels the SLEEP function.)
Note
If you press the MANUAL, FM 1, FM 2 or FM 3 button, after the
SLEEP button has been pressed, the sleep timer function will be
released.
¢ The alarm function does not work while the sleep timer is on.
Regarding the radio alarm, you can be awakened by a
manually tuned station, but cannot be awakened by a preset
station.
1 Set the alarm time for radio or buzzer.
Set the radio alarm time with TIME SET H and M while
holding down ALARM /AJRADIG}.
Set the buzzer alarm time with TIME SET H and M
while holding down ALARM iB/BUZZER,.
To advance the digits rapidly
Press the H and the M button continuously while holding
down the ALARM set button.
2 Set the function selector switch to the desired alarm
position: SINGLE ALARM [AJRADIO)|, SINGLE ALARM
BIBUZZER,, or DUAL ALARM ‘AjRADIO/B/SUZZER,.
For radio alarm
Press the MANUAL button,
and tune in the desired station and adjust volume as
described in “Radio Operation (Manual Tuning)’:
For dual aiarm
If you set the radio and the buzzer to the same time, only
the radio sound will be heard.
If the buzzer alarm is set to the time before the radio alarm
stops, the alarm shifts from radio to buzzer at the alarm
preset time, and vice versa.
Notes
¢ The buzzer sound level is fixed, and independent of the VOL
control.
¢ If the earphone is connected to the earphone jack, at the preset
time, the radio will sound trom both the earphone and speaker,
and the buzzer wil! sound only from the speaker.
The radio or buzzer will automatically sound at the preset
time, and automatically turn itself off after 59 minutes,
unless it is turned off manually.
To turn off the alarm manually, press the ALARM
RESET/RADIO OFF button. The alarm will sound at the
regular preset time on the following day.
Snooze Alarm Function
{f you awake to the radio or buzzer but want to doze for a
few more minutes, just lightly press DREAM BAR SNOOZE/
SLEEP OFF*. The radio or buzzer will be silenced but will
automatically come on again after about eight minutes. If you
want to doze more, press the bar again.
Notes
¢ You can reset the alarm time while activating the snooze function.
© To cance! the alarm before the alarm time, press the ALARM
RESET/RADIO OFF button.
* To read out instantly the alarm preset time, press the ALARM set
button {AJRADIO: or iB[BUZZER,.
aes | Po ed On an Pc eA ed
To Use Both Sleep Timer and Alarm Function :
1 Set the alarm. (See ‘‘How to Set the Alarm’’.)
2 Set the sleep timer. (See ‘‘How to Use the Sleep Timer’’.)
3 Set the function selector switch to SINGLE ALARM
(AIRADIO}, SINGLE ALARM (B/BUZZER] or DUAL ALARM
(AIRADIOIBIBUZZER).
You can fall asleep to the radio sound and you will be
awakened by the radio/buzzer alarm at the preset time.

SECTION 2
ELECTRICAL ADJUSTMENTS
AM SECTION
AM RF signal
generator
Put the lead-wire
fw antenna close to
the set.
(commen
400Hz, 30%
AM modulation
Output level: as low as possible
FM SECTION
FM RF signal
generator
0.01 u F
: ee
+ 22.5kHz frequency deviation
by 400Hz signal
lead wire
antenna input terminal
Speaker terminal
@ Repeat the procedures in each adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done
by the trimmer capacitors,
Adjustment Location: main board
S
6 ®
AM IF ADJUSTMENT
Adjust for a maximum reading on VTVM
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM
600 ke
Adjust for a maximum reading on VTVM
86.5 (87.35) (87.35) MHz
L3-1, 3-2 86.5 (87.35) (87.35) MHz
109.5 (107.9) (108.25) MHz
( ): AEP, E, AUS model
( ): IT model
lead wire antenna input terminal
Q 4
—
ee:
cT1 ae LS
C2 = S aa a
Y dd
Tee
5 | = N 3-13,
OF: Ww Q-—
1
RV2
®
L3-2

SECTION 3
DIAGRAMS
3-1. DESCRIPTION OF IC3 (uPD65005C) PIN FUNCTION
ae I/O | Pin. Description
Name
Output level is “H” while “L” level feed-in to Pin number @ to
® ( Clock IC, Alarm, Sleep reset )
Manual, Preset @ to @, Input “L”
LED Output. Off (L) position for power output terminal.
Hold the last channel memory for manual and preset function.
Ground (L)
The terminal for Output level Which selected by analogue switch
conjunction with Pin number @ to ©,
www ee web nee cw ede cen we nw bi ee ee ns ee ew ec ee meena e eet ent eee ne eee tee eee we we ete enero nen
Ground
DC power supply input terminal for set the voltage by manual or
preset variable resistor. (1.5 - 5¥)
Ground
Power ON reset input terminal. More than 150 mSec.
LED signal level is come out at “H” level from this terminal
with related Pin number @ to ©. RED LED is direct drive.
Ground
Clock input for timing, AC 50Hz/60Hz
Ground
Band select signal output terminal for radio.
Pin number @ at manual input position - Output level is me
At the alarm position - Output level is “H”
Pin number to ® at Hhesee input position
- Output level is “L”
Output for radio and ON/OFF mute control signal.
Output level is “L” at input level feed-in to Pin number @ to
, © and
Muting output signal level “H” set to 166. 7msec fat constant
at input level feed-in to Pin number@ to ©. At 60Hz
Should selected first the SWM @ at clock IC alarm signal level
“H” feed-in to input terminal,
PWR @ Output level “L” — “H”
LEDM 49 Output level “L” — “H”
BAND @) Output level “H” — “H”
VOUT SWM = SWM
Input terminal for clock IC sleep signal.
Hold the last channel memory while input level feed-in.
Power supply terminal +5 Volts

3-2.
PRINTED
WIRING
BOARDS
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12
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CND model: Canadian model (AEB.E,IT,AUS)
IT model: Italian model
AUS model: Australian model
PA model: Panama model
es ee - — --
* O—— : parts extracted from the component side.
+ Hs: parts mounted on the conductor side.
ety
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: pattern on the side which is seen.
—7—
_g—

3-3.
SCHEMATIC
DIAGRAM
§®@
See
page
12
for
notes.
ICF-C730
1
2
3
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5
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The
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Les
composants
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RD5.6ES-T1B2
eee
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; fied b rk dot Et SWITCH BOARD
AUS
model:
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model
ted
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mark
A
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Ba
a
are critical for safety. Ne les remplacer que par une
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number specified. fié.
PA model: Panama model
=)
==

ICF-C730
@ Semiconductor Lead Layouts
2SA933S-OR 1T33
2SC2001-K2
*
Ec B
10E2
2SC1740S-QR
cathode
anode
& c i
LN230RPP
28D1468S-S
jatcer Fp
HH cathode
ay anode
te
RD5.6ES-B2
18S119
cathode
anode
Note on schematic diagram.
Ali capacitors are in uF unless otherwise noted. pF:
vees
50WV or less are not indicated except for electrolytics
and tantalums.
All resistors are in © and 4 Wor less unless otherwise
speci fied.
4: internal component.
: B+ lines.
("__] : adjustment for repair.
Voltage and waveforms are dc with respect to ground
under no signal conditions.
no mark : FM
( ) 2 AM
Voltages are taken with a VOM. (input impedance 10 MQ)
Voltage variations may be noted due to normal produc-
tion tolerances.
Signal path.
Cc : FM

wre
SOA LS
ta — Oo
12
13
14
15
16
7
NOTE:
@ The mechanical parts with no reference
number in the exploded views are not
supplied.
The construction parts of an assembled
part are indicated with a collation num- e
ber in the remark column.
Items marked “*"’ are not stocked since
they are seldom required for routine
Some delay should be antici-
pated when ordering these items.
service.
Part No.
3-902-712-21
3-902-71 2-31
3-902-720-01
3~902-714-01
3~902-714-11
3-902-714-21
3-902-715-11
3-902-739-01
*3-902-738-01
3-902-724-1711
3-902-724-21
*3-902-743-01
3-902-721-01
3-902-721-12
3-902-722-01
3-902-719-01
3-902-719~-11
3~903-113-01
3-903-113-1]
3-903-113-21
3-903-113-31
3-903-113-41
7-682-547-04
3~902-728-01
3~-902-728-11
3-902-718-01
3-902-718-11
3-902-726-01
3-902-717-01
3-902-717-11
3-902-716-01
3-902-716-11
Description
SECTION 4
EXPLODED VIEW
Color
Example:
A Th
(SWITCH BOARD) &- 24
(WHITE)....CABINET (UPPER)
(BLACK)....CABINET (UPPER)
KNOB (F)
(AUS). ..eeeeee PANEL
(AEP ,£,IT)....PANEL
(US,CND,PA)...PANEL
PLATE, INDICATION
WIRE (GROUND)
SHEET (GROUND)
(AEP ,E,IT,AUS)...DRUM, DIAL
(US,CND,PA)...... DRUM, DIAL
SHEET (BAND)
(WHITE)...KNOB (P)
).
(BLACK )...KNOB (P)
HOLDER (VOL)
(WHITE)...KNOB (VOL)
(BLACK)...KNOB (VOL)
(US,CND,AEP,IT:WHITE)...CABINET (LOWER)
(MADE IN JAPAN)
(AEP ,IT:BLACK)...CABINET (LOWER)
(MADE IN JAPAN)
(AEP ,IT:WHITE)...CABINET (LOWER)
(MADE IN TAIWAN)
(AEP ,E,IT,AUS:BLACK)...CABINET (LOWER)
(MADE IN TAIWAN)
(US,CND,PA:WHITE)...... CABINET (LOWER)
(MADE IN TAIWAN)
SCREW +PTT 3X6 (S)
(WHITE)...STOPPER, CORD
(BLACK)...STOPPER, CORD
(WHITE)...KNOB (TUNE)
(BLACK)...KNOB (TUNE)
PLATE, CONTACT (S2,7,11,12)
(WHITE)...BUTTON (C)
(BLACK)...BUTTON (C)
(WHITE)...BUTTON (P)
(BLACK)...BUTTON (P)
Remarks
Cabinet's Color
No.
19
20
2]
22
23
24
25
26
27
28
29
901
Parts’ Color
901 (including @ A)
| AEP, E,
Part No.
3-593-019-00
*3-902-723-01
7-621-773-86
*3-902~-737-01
7-685-646-79
7~685-134-19
7-685-648~-79
7~685~-649~-79
7-685-549-14
*3-893-382-01
*3-723-073-01
*A-3806-065-A
*A-3806-075-A
*A~3806-126-A
902 A\.1-555-795-00
A\. 1-558-566-21
A\.1-559-912-11
A\.1-574-158-11
903
904
DISP
DISP
EPJ
JW701
JW703
JW704
JW705
L]
L1
SP1
1~535-253-00
*1-535-688-11
8-719-975-68
8-719-975-69
1-563-836-21
1-575-398-11
1-57§-159-21
1-575-159-21
1-575-159-21
1-402-464-11
1-402-472-11
1-503-082-00
T2 A.1-449-528-11
T2 A.1-449-529-11
T2 = A.1-449-530-11
@ Due to standardization, parts with part
number suffix -XX and -X may be dif-
ferent from the parts specified in the
components used on the set.
Indication of Appearance Parts
(RED)... KNOB, BALANCE (WHITE)
t
|
The components identified by
mark or dotted line with mark
are critical for safety.
eplace only with part number
specified.
Les composants identifiés par une
marque sont critiques pour la
sécurité.
Ne les remplacer que par une
piéce portant le numéro spécifé.
@ CND model: Canadian model
IT model: Italian model
AUS model: Australian model
PA model: Panama model
Description Remarks
CLAW, SPEAKER
HOLDER (LED)
SCREW +P 2.6X4
SHEET, INSULATING
SCREW +P 3X8 TYPE2 NON-SLIT
SCREW +BTP 2.6X8 TYPE2 N-S
SCREW +P 3X12 TYPE2 NON-SLIT
SCREW +P 3X14 TYPE2 NON-SLIT
SCREW +BTP 3X14 TYPE2 N=-S
PLATE (SFU), SHIELD
CUSHION
(US,CND,PA)...MOUNTED PCB, MAIN (HAND)
(AEP ,£,1T)....MOUNTED PCB, MAIN (HAND)
UAUS Vo ita wiswects MOUNTED PCB, MAIN (HAND)
(AEP ,IT)...... CORD, POWER
(US,CND,PA)...CORD, POWER
(AUS Vea suiereats CORD, POWER
ED reer ee CORD, POWER
SNAP, BATTERY
(AEP ,E,1T,AUS)... TERMINAL
(US,CND,AUS,PA)...DIODE SL2094-11TB
(LED DISPLAY)
(AEP ,E,IT)...DIODE SL2094-147B
(LED DISPLAY)
JACK (EARPHONE)
CORD, CONNECTION (9-CORE RIBBON)
CORD, CONNECTION (11-CORE RIBBON)
CORD, CONNECTION (11-CORE RIBBON)
CORD, CONNECTION (11-CORE RIBBON)
(US CND SPA) oa 3:.- 4 ANTENNA, FERRITE-ROD(MW)
(AEP ,£,IT,AUS)...ANTENNA, FERRITE-ROD(MW)
SPEAKER
(US,CND,PA)...TRANSFORMER, POWER
(AEP ,E,IT).... TRANSFORMER, POWER
(AUS }ccadc eee TRANSFORMER, POWER