Sony ICF C295 clock radio Service manual

ICF-C29S
SERVICE MANUAL US Model
Canadian Model
HE
MICROFILM
SPECIFICATIONS
Frequency range:
FM: 87.5 - 108 MHz
AM: 530 - 1,605 kHz
Speaker:
Approx. 6.6 cm (2 5/3 inches) dia.
Power output:
150 mW (at 10 % harmonic distortion)
Power requirements:
120 V AC, 60 Hz
For the power backup function: 9 V DC, one
6F22 battery
Battery life:
Approx. 200 minutes, using Sony S-006P(U)
battery
Dimensions:
Approx. 192 x 52 x 155 mm (w/h/d)
(75/8 x2 1/4 x 6 1/5 inches) incl. projecting
parts and controls
Mass:
Approx. 520 g (1 Ib 2 oz.) not incl. battery
Design and specifications are subject to change
without notice,
FM/AM CLOCK RADIO
SONY.
HOW TO CHANGED THE CERAMIC FILTERS
This model is used two ceramic filters of CF2 and CF3.
You must used same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must changed two pieces together
since it's supply two pieces in one package as a spare parts.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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.
Mark | Center frequency
CF2
red 10.70 MHz
mark blue 10.67 MHz
orange 10.73 MHz
CF3 black 10.64 MHz
white 10.76 MHz
SAFETY-RELATED COMPONENT WARNINGI!
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.
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.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. 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 pas-
sive 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
Paris on Set
A
"a
an
= 1.5 Ко
АС
voltmeter
(0.75 V)
0.15 uF
anal
|
— Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A
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.
[RADIO + -EUZZER IE
CLOCK H-«TIMESET-M ALARM SLEEP
SNOOZE / SLEEP OFF
С
В
SECTION 1
GENERAL
This section is extracted from
Installing the
Battery
To keep good time, your Dream Machine needs
one 6F22 battery (not supplied), in addition to
house current. The battery keeps the clock
operating in the event of a power interruption.
Before setting the time on your Dream Machine,
open the lid at the bottom of the unit, install the
battery with correct polarity and then close the
lid.
» After a power interruption, the displayed time
may not be always correct (it may gain or lose
about 10 minutes per hour).
Knowing When to Replace the
Battery
* To check battery power, unplug the AC power
cord from the wall outlet and plug it in again
after a few minutes. If the displayed time is
incorrect, replace the battery with a new one,
Setting the Clock
1 Plug in the unit.
The display will flash “AM 12:00”.
2 To set the hour, while holding down
CLOCK, press TIME SET H. When the
correct hour appears in the display,
release CLOCK,
3 To set the minute, while holding down
CLOCK, press TIME SET M. When the
correct minute appears in the display,
release CLOCK. The clock will begin to
operate when you release TIME SET
M.
# The clock system varies depending on the
model you own.
12-hour system: “AM 12:00" = midnight
* Each press on TIME SET H or TIME SET M
advances the displayed number by one.
* The minute digits advance ko “00” after “59”,
The hour digits do not advance by pressing
TIME SET M.
* To adjust the time exactly to the second, release
TIME SET M simultancously with the time
signal.
Playing the Radio
1 Set the function selector to RADIO ON
to turn on the radio and adjust VOL
(volume).
2 Select BAND and tune in to a station
using TUNING.
* To turn off the radio, set the function selector
to OFF.
* To improve radio reception
FM: Since the AC power cord acts as an
antenna, extend the cord to Improve FM
reception.
AM: Rotate the unit horizontally for optimum
reception. A ferrite bar antenna ls built
into the unit.
instruction manual.
Setting the Alarm
To set the radio alarm, first tune in to a station
and adjust the volume.
1 To set the hour for alarm, while
holding down ALARM, press TIME
SET H. When the desired hour appears
in the display, release ALARM.
2 To set the minute for alarm, while
holding down ALARM, press TIME
SET M. When the desired minute
appears in the display, release
ALARM.
3 Set the function selector to the alarm
sound of your choice (RADIO or
BUZZER).
The alarm will come on at the preset
time and automatically turn itself off
after 119 minutes.
* Ta shut off the alarm, set the function selector
to OFF,
To sound the alarm at the preset time the next
day, set the function selector to RADIO or
BUZZER again.
* To cancel either alarm, set the function selector
to OFF,
* To dozc a few more minutes, press SNOOZE/
SLEEP OFF.
The alarm will shut off, but will come on again
after about 9 minutes. You can repeat this
ss as many times as you like,
* To adjust the radio alarm volume, turn VOL.
The buzzer volume is fixed.
» To check the preset time, press ALARM,
Setting the Sleep
Timer
Enjoy falling asleep to the radio using the built-in
sleep timer that shuts off the radio automatically
after a preset time.
1 While listening to the radio, set the
function selector to OFF.
2 Press SLEEP.
The radio turns on. lt will go off after
59 minutes.
* Tu turn off the radio before the preset time,
press SNOOZE /SLEEP OFF.
» Every time you press SLEEP, the sleep timer is
reset to 59 minutes.
* When you set the function selector to RADIO or
BUZZER, if the preset alarm time comes while
the sleep timer is operating, the radio or buzzer
sounds depending.on which you set.
To Use Both Sleep Timer
and Alarm Function
You can fall asleep to the radio sound and you
will be awakened by the radin/buzzer alarm at
the preset ime.
1 Set the alarm. (See “Setting the
Alarm”.3
2 Tress SLEEP,
SECTION 2
SETTING
SETTING THE POWER CORD
Set the power cord as illustrated below, then install the lower cabinet.
lower cabinet
power cord
KNOB SETTING
© Turn shaft of CV1 to the
( arrow @ direction fully.
> NÓ
I~
N=
N OF ¿
> AN O Turn RV1 to the arrow @
~ © direction fully.
O MAIN board i 3
[TEs
@ claws
@ claw
O Turn the knob (VOL) to the
arrow © direction fully.
O Turn the knob (tuning) to the
arrow OQ) direction fully.
SECTION 3
ELECTRICAL ADJUSTMENTS
FM SECTION
Setting:
BAND switch: FM
FM RF signal
generator MAIN board
| (Conductor Side)
TP (RF IN)
set
400 Hz, 30% FM modulation
frequency deviation + 22.5 kHz
Output level: as low as possible
AM SECTION
Setting:
BAND switch: AM
AM RF signal
generator Put the lead-wire
antenna close to
|” ее
400 Hz, 30%
AM modulation
Output level: as low as possible
level meter
80 [a
set I +
|
speaker terminal
* Repeat the procedures in each adjustment several times, and
the frequency coverage and tracking adjustments should be fi-
nally done by the trimmer capacitors.
Adjustment Location: MAIN board (Component Side)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 86.5 MHz
CT3 109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
Confirm 86.5 MHz
CT2 109.5 MHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520 kHz
CT4 1,650 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
Ll 600 kHz
CT1 1,500 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455 kHz
FM FREQUENCY
COVERAGE ADJUSTMENT
— ——
L3 CT3
T1
AM IF ADJUSTMENT
1 — LS N
> IC1
L1
al AM TRACKING ADJUSTI
a PS CTI
N \ | N
LA CT4 CT2
——— FM TRACKING ADJUSTMENT
AM FREQUENCY
COVERAGE ADJUSTMENT
* |C Block Diagrams
ICi CXA10195
GND
GND
AF OUT
VCC
RIPPLE
FILTER
AF IN
AF POWER AMP
--
=
©
rm
a
AM IF DET AGC
AFC AGC
AFC AGC
FM
DISCRIMINATOR
m
=
TI
m
IF GND
METER
TUNING
METER
N.C
FM IF IN
AM IF IN
FM/AM BAND
SELECT
DK VH3H4H5HK-7-8>-6G
a az E do dd e E LE ZA = SE
SE 258x835 u=8k 50
a = = © & Lu Es
< = © == =
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IC2 LM8560N
5 Es Na = == = =5
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IR ©=SHSE о а 25 sh 2 32 25 25222
D— ® D (3 70-03
50/60Hz {50/60Hz [50/60Hz |50/60Hz — |50/60Hz — |50/60Hz
| y —— | OUTPUT L__
| CONTROL CONTROL
2Hz т
| INPUT [— S.SAMPLE
PWA 4—— CONTROL F SAMPLE Г —TONE
UP Г
| 2Hz SLEEP — PWR UP
SEC RSTYHLD CTR
RESET ALARM & ALARM &
CONTROL — T.RST S.SAMPLE F.SAMPLE
— Nr CAST ALARM | |ALARM
S.SAMPLE
NEC MIN CTR | {HR CTR
/—— > — SEC DISP a
OUTPUT NTE | COMPARATOR |
DECODER/ DISPLAY |— T.DISP COMPARATOR
DRIVER Y ALARM CONTROL |_ Г
ALDISP TIME TIME
E .— — SL.DISP MINCTR | |HRCTR
N—— |
TIMES TIME &
S.SAMPLE F.SANPLE
1-13 (Y
=5 >
==
Do
wn
— 11 —
NOTE:
* -XX and -X mean standardized parts, so they
may have some difference from the original one.
* Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
T T
Cabinet's Color
Parts Color
SECTION 5
EXPLODED VIEW
» 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 num-
ber in the exploded views are not supplied.
Accessories and packing materials are given in
the last of the electrical parts list.
The components identified by mark
A or dotted line with mark A are
critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque A sont critiquens pour la
sécurité.
Ne les remplacer que par une piéce
portant le numéro spécifié.
(including OA)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1 3-018-229-21 KNOB (FUNCTION) (YELLOW) 10 3-919-269-01 POINTER
1 3-018-229-31 KNOB (FUNCTION) (VIOLET) 11 3-919-268-01 KNOB (VOL)
2 3-919-270-01 MARKER * 12 1-654-818-11 POEWR SUPPLY BOARD
3 3-018-230-41 SCALE, DIAL (YELLOW) 13 3-018-227-61 CABINET (LOWER)
3 3-018-230-51 SCALE, DIAL (VIOLET) 14 3-369-135-21 LID, BATTERY CASE
4 3-018-226-21 CABINET (UPPER) (YELLOW) A15 1-783-817-21 CORD, POWER
4 3-018-226-31 CABINET (UPPER) (VIOLET) 17 7-621-770-87 SCREW +P 2.6X5
5 3-018-228-21 BUTTON (YELLOW) 18 7-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT
5 3-018-228-31 BUTTON (VIOLET) 19 3-368-852-01 FOOT
* 6 A-3679-648-A MAIN BOARD, COMPLETE SP1 1-504-748-11 SPEAKER (6.6CM)
7 1-535-804-21 SNAP, BATTERY AT2 1-427-927-11 TRANSFORMER, POWER
9 3-919-267-01 KNOB (TUNE)
— 12 —
SECTION 6
ELECTRICAL PARTS LIST MAIN
NOTE:
* Due to staridardization, replacements in the * Items marked “*” are not stocked since they The components identified by
parts list may be different from the parts speci- are seldom required for routine service. mark A or dotted line with mark
fied in the diagrams or the components used on Some delay should be anticipated when order- a are critical for safety.
. eplace only with part number
the set. ing these items, specified.
* -XX and -X mean standardized parts, so they « SEMICONDUCTORS - —
may have some difference from the original one. In each case, u: u, for example: Les composants identifiés peur la
» RESISTORS UA.. :pA.. uPA..:pPA.. sécurité. dev P
All resistors are in ohms. uPB.. : uPB. . uPC. .: uPC. . Ne les remplacer que par une pièce
METAL: Metal-film resistor. uPD.. :pPD.. portant le numéro spécifié.
METAL OXIDE: Metal oxide-film resistor. « CAPACITORS
F: nonflammable uF: pF When indicating parts by reference
* COILS number, please include the board.
uH: pH
Ref. No. Part No. Description Remark Ref. No. Part No Description Remark
* A-3679-648-A MAIN BOARD, COMPLETE < CONNECTOR >
* CN1 1-769-137-11 CORD, CONNECTION (16 CORE)
1-535-804-21 SNAP, BATTERY
7-621-770-87 SCREW +P 2.6X5 < VARIABLE CAPACITOR >
< CAPACITOR > CT1-4 1-141-526-11 CAP, VAR
СУ! 1-141-526-11 CAP, VAR (TUNING)
C2 1-102-952-00 CERAMIC 16PF 5% 50V
C3 1-102-960-00 CERAMIC 24PF 5% 50V < DIODE >
C5 1-101-081-00 CERAMIC 130PF 5% 50V
C6 1-101-880-00 CERAMIC 47PF 5% 50V D1 8-719-921-19 DIODE 18S119-25TG
C7 1-104-664-11 ELECT 47uF 20% 10V D2 8-719-921-19 DIODE 1SS119-25TG
D3 8-719-921-19 DIODE 18S119-25TG
C8 1-101-004-00 CERAMIC 0.01uF 50V D4 8-719-921-19 DIODE 155119-25TG
C9 1-126-963-11 ELECT 4.7uF 20% 50V D5 8-719-921-19 DIODE 15S119-25TG
C10 1-101-004-00 CERAMIC 0.01uF 50V
C11 1-101-004-00 CERAMIC 0.01uF 50V D6 8-719-052-88 DIODE 1N4002
C12 1-101-004-00 CERAMIC 0.01uF 50V D7 1-809-515-11 DIODE LTC-6512PDK2 (LED DISPLAY)
C13 1-126-963-11 ELECT 4.7uF 20% 50V <IC>
C14 1-124-907-11 ELECT 10uF 20% 50V
C15 1-101-005-00 CERAMIC 0.022uF 50V 161 8-752-037-02 IC CXA1019S
G16 1-124-903-11 ELECT 1uF 20% 50V 102 8-759-821-46 IC LM8560N
C17 1-104-664-11 ELECT 47uF 20% 10V
< COIL >
C18 1-162-851-11 CERAMIC 0.1uF 10% 16V
C19 1-162-851-11 CERAMIC 0.1uF 10% 16V L1 1-501-742-11 ANTENNA, FERRITE-ROD (AM)
C20 1-126-968-11 ELECT 100uF 20% 6.3V L3 1-428-163-11 COIL, AIR-CORE
C21 1-161-050-00 CERAMIC 0.0082uF 10% 16V L4 1-411-175-11 COIL (AM OSC)
C22 1-101-004-00 CERAMIC 0.01uF 50V L5 1-411-136-11 COIL, AIR-CORE
L6 1-411-136-11 COIL, AIR-CORE
C23 1-101-004-00 CERAMIC 0.01uF 50V
024 1-101-004-00 CERAMIC 0.01uF 50V < TRANSISTOR >
C25 1-101-004-00 CERAMIC 0.01uF 50V
C26 1-126-934-11 ELECT 220uF 20% 16V Q1 8-729-119-76 TRANSISTOR 2SA1175-HFE
027 1-126-941-11 ELECT 470uF 20% 6.3V Q2 8-729-119-76 TRANSISTOR 2SA1175-HFE
C28 1-124-471-00 ELECT 1000uF 20% 6.3V < RESISTOR >
C29 1-101-004-00 CERAMIC 0.01uF 50V
C30 1-101-004-00 CERAMIC 0.01uF 50V R1 1-249-397-11 CARBON 22 5% 1/4W
R2 1-249-397-11 CARBON 22 5% 1/4W
< FILTER > R3 1-249-441-11 CARBON 100K 5% 1/4W
R4 1-247-891-00 CARBON 330K 5% 1/4W
CF 1-577-072-11 FILTER, CERAMIC (455kHz) RS 1-249-433-11 CARBON 22K 5% 1/4W
CF2 1-760-144-61 FILTER, CERAMIC (10.7MHz)
CF3 1-760-144-61 FILTER, CERAMIC (10.7MHz) R6 1-247-887-00 CARBON 220K 5% 1/4W
R7 1-249-441-11 CARBON 100K 5% 1/4W
—13—
ICF-C295
The components identified by mark
A or dotted line with mark A are
critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque A sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
Sony Corporation
MAIN | | POWER SUPPLY
Ref. No. Part No. Description Remark
< VARIABLE RESISTOR >
RV1 1-228-790-00 RES, VAR, CARBON 50K (VOL)
< SWITCH >
Si 1-762-231-11 SWITCH, SLIDE (BAND)
52 1-762-232-11 SWITCH, SLIDE (OFF, RADIO ON, ALARM)
53 1-762-233-11 SWITCH, KEYBOARD (ALARM)
54 1-762-233-11 SWITCH, KEYBOARD (TIME SET M)
55 1-762-233-11 SWITCH, KEYBOARD (TIME SET H)
S6 1-762-233-11 SWITCH, KEYBOARD (CLOCK)
57 1-762-233-11 SWITCH, KEYBOARD (SLEEP)
S8 1-762-233-11 SWITCH, KEYBOARD (SNOOZE/SLEEP OFF)
< TRANSFORMER >
T1 1-404-790-11 TRANSFORMER, IF
she se ok of oe ae a e ale oe fe ad oe ale oe oe ad oe fe sb oe of ae ade ole se se sf ale se ee se ok ok ee ole de oe ae ale of ae fe oe de je aj oe abc af of af of fe sé oe of
* 1-654-818-11 POWER SUPPLY BOARD
LE e e EEE ekki sis de os
208 ak ske akeaje fe je ie oe of of of oe de she ie ole ode of ode of ale ade ae de sk oko sk of of she she se deje je ode she ote ode ole she she fe fe e de de of of je ole je e e ke je ek
MISCELLANEOUS
ЖЕ RRE
A15 1-783-817-21 CORD, POWER
SP1 1-504-748-11 SPEAKER (6.6CM)
AT? 1-427-927-11 TRANSFORMER, POWER
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ACCESSORIES & PACKING MATERIALS
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3-861-255-51 MANUAL, INSTRUCTION (ENGLISH) (US)
3-861-255-32 MANUAL, INSTRUCTION (ENGLISH, FRENCH,
SPANISH, ARABIC) (Canadian)
9-924-910-11
Personal A&V Products Company
— 14 —
98E057023-1
Printed in Singapore © 1998. 5
Published by Quarity Engineering Dept.
(Shibaura)