Sony ICF-CDK50 Service Manual ▷ View online
SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio&Video Business Group
ICF-CDK50
FM/AM CD KITCHEN CLOCK RADIO
9-887-979-02
2008I00-1
©
2008.09
US Model
Canadian Model
AEP Model
Ver. 1.1 2008.09
SPECIFICATIONS
Model Name Using Similar Optical Pick-up Block
ZS-BT1/S50CP
Optical Pick-up Block Type
KSM-213CCP
CD player section
System: Compact disc digital audio system
Laser diode properties:
Laser diode properties:
Emission duration: Continuous
Laser output: Less than 44.6 μW
(This output is the value measured at a distance of
about 200 mm from the objective lens surface on
the optical pick-up block with 7 mm aperture.)
Laser output: Less than 44.6 μW
(This output is the value measured at a distance of
about 200 mm from the objective lens surface on
the optical pick-up block with 7 mm aperture.)
Number of channels: 2
Frequency response: 20 – 20 000 Hz
Frequency response: 20 – 20 000 Hz
+1
–2
–2
dB
Wow and flutter: Below measurable limit
Radio section
Frequency range (US and Canadian models):
FM: 87.5 – 108 MHz
AM: 530 – 1 710 kHz
AM: 530 – 1 710 kHz
Antennas:
FM: AC power cord
AM: Built-in ferrite bar antenna
AM: Built-in ferrite bar antenna
General
Time display: 12-hour system (US, Canadian models)
24-hour system (AEP model)
Speaker: 66 mm (2
5
⁄
8
inches) diam., 4 Ω, cone type (2)
Input:
Built-in audio cable with stereo miniplug (1):
minimum input level 245 mV, impedance 47 kΩ
minimum input level 245 mV, impedance 47 kΩ
Power outputs:
1.9 W + 1.9 W (at 4 Ω, 10 % harmonic distortion)
Power requirements: 120 V AC, 60 Hz
(US and Canadian models)
220 – 230 V AC, 50 Hz
(AEP model)
220 – 230 V AC, 50 Hz
(AEP model)
For Power backup: 3 V DC, one CR2032 battery
Dimensions:
Approx. 350 × 85 × 300 mm (w/h/d)
(Approx. 13
(Approx. 13
7
⁄
8
× 3
3
⁄
8
× 11
7
⁄
8
inches)
incl. projecting parts and controls
Mass: Approx. 2.7 kg (6 lb 1 oz)
Supplied accessories:
mounting screws (M5 screw) (4)
template (1)
spacers (4)
cord clamp (1)
remote commander (1)
digital music player holder (1)
template (1)
spacers (4)
cord clamp (1)
remote commander (1)
digital music player holder (1)
Design and specifications are subject to change
without notice.
without notice.
Frequency range (AEP model):
Band
Frequency range
Channel step
FM
87.5-108 MHz
0.05 MHz
AM
531-1 611 kHz
530-1 610 kHz
530-1 610 kHz
9 kHz
10 kHz
10 kHz
ICF-CDK50
2
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
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.
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.
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 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
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 microamperes.).
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.
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-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 passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
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)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
μF
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
SAFETY-RELATED COMPONET WARNING!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WITH MARK 0 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.
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
CAUTION
Use of controls or adjustments or performance of procedures other than
those specifi ed herein may result in hazardous radiation exposure.
Use of controls or adjustments or performance of procedures other than
those specifi ed herein may result in hazardous radiation exposure.
WARNING
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
1.
SERVICING NOTES
............................................. 3
2. GENERAL
.................................................................. 4
3. DISASSEMBLY
3-1. Disassembly
Flow
........................................................... 6
3-2. Cabinet
(Upper)
.............................................................. 6
3-3. CD
Mechanism
Deck
...................................................... 7
3-4. Cabinet (Front) Block ..................................................... 7
3-5. MAIN
3-5. MAIN
Board
................................................................... 8
3-6. Belt
.................................................................................. 8
3-7. CD
Block
........................................................................ 9
3-8. Optical Pick-up Block (KSM-213CCP) ......................... 9
4.
TEST MODE
............................................................ 10
5. ELECTRICAL
ADJUSTMENTS
........................ 12
6. DIAGRAMS
6-1. Printed Wiring Board - CD Board - ................................ 16
6-2. Schematic Diagram - CD Board - ................................... 17
6-3. Printed Wiring Board - TU Board - ................................ 18
6-4. Schematic Diagram - TU Board - ................................... 19
6-5. Printed Wiring Board - MOTOR Board - ....................... 20
6-6. Schematic Diagram - MOTOR Board - .......................... 20
6-7. Printed Wiring Boards - MAIN Section - ....................... 21
6-8. Schematic Diagram - MAIN Section (1/2) - ................... 22
6-9. Schematic Diagram - MAIN Section (2/2) - ................... 23
6-10. Printed Wiring Boards - PANEL Section - ..................... 24
6-11. Schematic Diagram - PANEL Section - .......................... 25
6-2. Schematic Diagram - CD Board - ................................... 17
6-3. Printed Wiring Board - TU Board - ................................ 18
6-4. Schematic Diagram - TU Board - ................................... 19
6-5. Printed Wiring Board - MOTOR Board - ....................... 20
6-6. Schematic Diagram - MOTOR Board - .......................... 20
6-7. Printed Wiring Boards - MAIN Section - ....................... 21
6-8. Schematic Diagram - MAIN Section (1/2) - ................... 22
6-9. Schematic Diagram - MAIN Section (2/2) - ................... 23
6-10. Printed Wiring Boards - PANEL Section - ..................... 24
6-11. Schematic Diagram - PANEL Section - .......................... 25
7.
EXPLODED VIEWS
7-1. Cabinet (Upper) Section ................................................. 29
7-2. Cabinet (Front) Section ................................................... 30
7-3. Cabinet (Lower) Section ................................................. 31
7-4. CD Mechanism Deck Section ......................................... 32
7-5. CD
7-2. Cabinet (Front) Section ................................................... 30
7-3. Cabinet (Lower) Section ................................................. 31
7-4. CD Mechanism Deck Section ......................................... 32
7-5. CD
Block
........................................................................ 33
8.
ELECTRICAL PARTS LIST
.............................. 34
TABLE OF CONTENTS
ICF-CDK50
3
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electrostat-
ic break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The fl exible board is easily damaged and should be handled with
care.
ic break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The fl exible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc refl ective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
The laser beam on this model is concentrated so as to be focused
on the disc refl ective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if the
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong
viscosity
Unleaded solder is more viscou-s (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
ICF-CDK50
4
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
AC power cord
Cord clamp
Template
Spacer
L (Low)
Dot
Mounting screw
Installing the unit under a
cabinet
cabinet
(See Fig.
)
Caution
Please read the following before
installing the unit
installing the unit
Due to its heavy weight, the unit should be installed
with great care.
Installation of the unit requires two persons.
Use tools carefully while installing of the unit.
Be sure that the cabinet that is used is sturdy enough
Use tools carefully while installing of the unit.
Be sure that the cabinet that is used is sturdy enough
to support the weight of the unit.
To reduce the risk of fire, do not place any heating or
cooking appliance beneath this unit.
Install the unit so that its AC power cord can be
connected directly to a wall outlet. Do not use a
converter or extension cord.
converter or extension cord.
Be sure that the AC power cord has no slack during
use of the unit, since the cord acts as an FM wire
antenna. If the AC power cord has some slack, wind
it around the cord hook so as to eliminate the slack.
antenna. If the AC power cord has some slack, wind
it around the cord hook so as to eliminate the slack.
The unit has a built-in ferrite bar antenna for AM
radio reception. Confirm that AM reception is
acceptable before finally attaching the unit.
acceptable before finally attaching the unit.
Install the unit as far as possible from sources of
noise (for example, a refrigerator, microwave oven or
fluorescent lamp).
fluorescent lamp).
This unit is not waterproof. Install it where it will
not be exposed to splashing by water, as this may
damage the unit.
damage the unit.
To reduce the risk of fire or electric shock, do not
touch the AC power cord with wet hands.
Never place objects between the top of the unit and
the bottom of the cabinet. This could cause the unit
to fall.
to fall.
Make sure the unit’s four screws are fastened tightly.
After installing the unit, do not pull down on it or
After installing the unit, do not pull down on it or
hang something heavy on it.
1
Decide on the installation location and
orientation of the unit based on the best
reception that is possible (see “Improving
the reception”).
orientation of the unit based on the best
reception that is possible (see “Improving
the reception”).
2
Mark the position of the 4 holes by using
the supplied template. Use a drill to make
the holes (size 6.5 mm diam.,
the supplied template. Use a drill to make
the holes (size 6.5 mm diam.,
9
/
32
inch). (See
Fig.
-)
3
When the cabinet door overhangs the shelf
and obstructs the unit, you can adjust the
unit/shelf height.
First set the L mark to the dot which
becomes the lowest position, then you
can adjust the height in 4 steps (H
and obstructs the unit, you can adjust the
unit/shelf height.
First set the L mark to the dot which
becomes the lowest position, then you
can adjust the height in 4 steps (H
L)
by turning the spacer counterclockwise
(See Fig.
(See Fig.
-). The unit can be installed
without the spacer.
4
Install the unit with the supplied mounting
screws. (See Fig.
screws. (See Fig.
-)
Note
If you lose the supplied screws, please purchase #10 or
M5 screws.
If you lose the supplied screws, please purchase #10 or
M5 screws.