DOWNLOAD Sony ICF-CD73 / ICF-CD73V Service Manual ↓ Size: 2.45 MB | Pages: 54 in PDF or view online for FREE

Model
ICF-CD73 ICF-CD73V
Pages
54
Size
2.45 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-cd73-icf-cd73v.pdf
Date

Sony ICF-CD73 / ICF-CD73V Service Manual ▷ View online

SERVICE MANUAL
ICF-CD73
FM/AM CD PORTABLE RADIO
ICF-CD73V
TV/WEATHER/FM/AM
CD PORTABLE RADIO
US Model
ICF-CD73V
Canadian Model
AEP Model
UK Model
E Model
ICF-CD73
SPECIFICATIONS
ICF-CD73/CD73V
Ver. 1.4  2006.12
9-877-131-05
Sony Corporation
2006L05-1
Personal Audio Division
©
 2006.12
Published by Sony Techno Create Corporation
Model Name Using Similar Mechanism
ZS-X3CP
CD Mechanism Type
KSM-900AAA
Optical Pick-up Name
KSS-900A
CD player section
System: Compact disc digital audio system
Laser diode properties: Material: GaAlAs
Wavelength: 780  nm
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.)
Frequency response : 20 
− 20 000 Hz 
 
+1
−1.5
  dB
Wow and flutter: Below measurable limit
 
Radio section
Frequency range: (ICF-CD73)
North America
Band
Channel
step
FM
87.5 
− 108 MHz
0.1  MHz
AM
530 
− 1
 
710 kHz
10  kHz
FM
87.5 
− 108 MHz
0.05  MHz
AM
531 
− 1
 
710 kHz
9 kHz
Other countries/regions
Band
Channel
step
FM
87.5 
− 108 MHz
0.05  MHz
AM
531 
− 1
 
611 kHz
9 kHz
FM
87.5 
− 108 MHz
0.1  MHz
AM
530 
− 1
 
610 kHz
10  kHz
Frequency range: (ICF-CD73V)
Band
Range
Channel
step
TV
2 – 13 ch
1 channel
WEATHER
1 – 7 ch
1 channel
FM
87.5 – 108 MHz
0.1 MHz
AM
530 – 1 710 kHz
10 kHz
General
Time display:
North America,  UK:  12-hour  system
Other countries/regions: 24-hour system
Speaker: 50 mm (2 inches) dia, 6 
Power outputs:
400 mW + 400 mW (at 10% harmonic
distortion)
Power requirements:
6 V DC, 4 R14  (size C) batteries
External power source:  DC IN 6 V
Dimensions:
Approx. 151.5 
× 248 × 84 mm (w/h/d)
(Approx. 6 
× 9 
7
/
8
 
× 3 
3
/
8
 inches) incl.
projecting parts and controls
Mass: Approx. 1  350  g  (2  lb  16  oz)  incl.  batteries
Supplied accessories:
Suction cup (1), Strap (1)
AC power adaptor (1)*
* Supplied with European model only
Design and specifications are subject to change
without notice.
Photo: ICF-CD73V
2
ICF-CD73/CD73V
Using the AC power adaptor
• When operating the unit with an external power source, do not remove the
batteries.
These batteries serve to backup the clock and memory settings. Since the
batteries discharge in this case as well, we recommend changing them about
once a year.
• To prevent battery leakage, we recommend removing the batteries when the
unit is connected to a wall outlet.
• Before connecting and disconnecting the external power source plug, be
sure to turn off the radio/CD. Otherwise, “E ” may be displayed. When this
occurs,turn on the radio/CD so that “E ” disappears..
• When the AC power adaptor is not to be used for a long period of time,unplug
it both from the DC IN 6 V jack and from the wall outlet.
• When the cover of the DC IN 6 V jack is open (to use the AC power adap-
tor), the jack area is not splash-resistant. When the AC power adaptor is not
connected to the DC IN 6 V jack, be sure to close the cover of the DC IN 6
V jack.
• Use the recommended Sony AC poweradaptor * only. The polarity of the
plugs of other manufacturers may be different. Failure to use the recom-
mended AC power adaptor may cause the unit to malfunction.
* Supplied with European model only
If you have any questions or problems concerning your unit,please consult
your nearest Sony dealer.
About CD-Rs/CD-RWs
This unit is compatible with CD-Rs/CD-RWs but playback capability may vary
depending on the quality of the disc,the recording device and application soft-
ware.
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  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.
SAFETY-RELATED  COMPONENT  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  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
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.
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
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-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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
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 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.
Soldering irons using a temperature regulator should be set to
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 flow)
than ordinary solder so use caution not to let solder bridges oc-
cur 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.
Polarity of the plug
3
ICF-CD73/CD73V
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
..............................................
4
2.
GENERAL
..................................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Cabinet (Front) Section ...................................................
6
3-3. Cabinet (Upper) Section .................................................
7
3-4. Chassis (Main) Section ...................................................
7
3-5. LCD Board ......................................................................
8
3-6. Mechanism Deck (KSM-900AAA) ................................
8
3-7. Optical Pick-up (KSS-900A) ..........................................
9
3-8. Speaker (SP101)/(SP201) ...............................................
9
4.
TEST MODE
.............................................................. 10
5.
ELECTRICAL  ADJUSTMENTS
........................ 13
6.
DIAGRAMS
6-1. Block Diagram  – CD Section – .................................... 17
6-2. Block Diagram  – TUNER Section (ICF-CD73) – ....... 18
6-3. Block Diagram  – TUNER Section (ICF-CD73V) – .... 19
6-4. Block Diagram  – MAIN Section – ............................... 20
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 21
6-6. Printed Wiring Board  – CD Section  – ......................... 22
6-7. Schematic Diagram  – CD Section – ............................. 23
6-8. Printed Wiring Board
– TUNER Section (ICF-CD73) – .................................. 24
6-9. Schematic Diagram
– TUNER Section (ICF-CD73) – .................................. 25
6-10. Printed Wiring Board
– TUNER Section (ICF-CD73V) – ............................... 26
6-11. Schematic Diagram
– TUNER Section (ICF-CD73V) – ............................... 27
6-12. Printed Wiring Boards  – MAIN Section – ................... 28
6-13. Schematic Diagram  – MAIN Section – ........................ 29
6-14. Printed Wiring Boards  – POWER Section – ................ 30
6-15. Schematic Diagram  – POWER Section – .................... 31
6-16. IC Pin Function Description .......................................... 34
7.
EXPLODED  VIEWS
7-1. Overall Section ................................................................ 36
7-2. Cabinet (Front) Section ................................................... 37
7-3. Cabinet (Main) Section ................................................... 38
7-4. Cabinet (Upper) Section ................................................. 39
7-5. Cabinet (Rear) Section-1 ................................................ 40
7-6. Cabinet (Rear) Section-2 ................................................ 41
7-7. Cabinet (Rear) Section-3 ................................................ 42
7-8. Optical Pick-up Section (KSM-900AAA) ..................... 43
8.
ELECTRICAL  PARTS  LIST
.............................. 44
4
ICF-CD73/CD73V
COLOR  VARIATION
MODEL
Destination
Window Color
Cabinet Color
Canadian
CLEAR BLUE
WHITE
ICF-CD73
Italian
CLEAR YELLOW
BEIGE
UK
US (ORIGINAL)
CLEAR BLUE
WHITE
ICF-CD73V
US (LIV)
CLEAR BLUE
WHITE
CLEAR YELLOW
BEIGE
The laser diode in the optical pick-up block may suffer electro-
static 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 flexible 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 reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S701. (push switch type)
The following checking method for the laser diode is operable.
• Method
Emission of the laser diode is visually checked.
1. Open the lid.
2. Push the S551 as shown in Fig.1.
3. Press the 
[CD       ]
 button.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
SECTION  1
SERVICING  NOTES
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
S551
Fig.1 Method to push the S551
NX
ORIGINAL MODEL
WINDOW Front View
LIV MODEL
DISCRIMINATION  OF  ORIGINAL  AND  LIV  MODEL
There are two types of ICF-CD73V.
Refer to following.
Ver. 1.3
NOTES  ON  EXCHANGING  THE  FLEXIBLE  FLAT
CABLE (13 CORE)
When the flexible flat cable which has connected the LCD board
(CNP402) and CD board (CNP702) is exchanged, please attach to
a set according to the following after bending.
1
Turn the character side up and bend in the direction 
(back side) of A from an end in the position of about 9 mm.
back side
character side
character side
character side
2
Bend in the direction of B from an end in the position 
of about 70 mm.
3
Attach in a set. 
LCD board
(CNP402)
CD board
(CNP702)
± 
9 mm
± 
70 mm
Page of 54
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Sony ICF-CD73 / ICF-CD73V Service Manual ▷ Download

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  • Here you can View online or download the Service Manual for the Sony ICF-CD73 / ICF-CD73V in PDF for free, which will help you to disassemble, recover, fix and repair Sony ICF-CD73 / ICF-CD73V Audio. Information contained in Sony ICF-CD73 / ICF-CD73V Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.