Sony CDX-444RF Service Manual ▷ View online
SERVICE MANUAL
COMPACT DISC CHANGER SYSTEM
US Model
Canadian Model
AEP Model
UK Model
E Model
SPECIFICATIONS
CDX-444RF
Model Name Using Similar Mechanism
CDX-434RF
CD Drive Mechanism Type
MG-251A-137
Optical Pick-up Name
KSS-720A
CD changer (CDX-444RF)
System
Compact disc digital audio system
Laser Diode Properties
Material
Material
GaAlAs
Wavelength
780 nm
Emission Duration
Continuous
Laser output power
Less than 44.6
µ
W*
* This output is the value measured at a distance of 200 mm from the
objective lens surface on the Optical Pick-up Block.
Transmitting frequency
88.3 MHz/88.5 MHz/
88.7 MHz/88.9 MHz/
89.1 MHz/89.3 MHz/
89.5 MHz/89.7 MHz/
89.9 MHz (switchable)
88.7 MHz/88.9 MHz/
89.1 MHz/89.3 MHz/
89.5 MHz/89.7 MHz/
89.9 MHz (switchable)
Input/output terminals
Wired remote control (8 pin)
RF signal (FM) output
Power input (3 pin)
RF signal (FM) output
Power input (3 pin)
Current drain
800 mA (at playback)
800 mA (at disc loading/ejecting)
800 mA (at disc loading/ejecting)
Operating temperature
–10
°
C to +55
°
C
(14
°
F to 131
°
F)
Dimensions
Approx. 262
×
90
×
181.5 mm
(10
3
/
8
×
3
5
/
8
×
7
1
/
4
in.) (w/h/d)
Mass
Approx. 2.1 kg (4 lb. 10 oz.)
Relay box
Input/output
Antenna input terminal
Antenna output cord
CD Changer input cord
Antenna output cord
CD Changer input cord
Dimensions
Approx. 40
×
40
×
27 mm
(1
5
/
8
×
1
5
/
8
×
1
1
/
8
in.) (w/h/d)
Mass
140 g (5 oz.)
Wired remote (RM-X82RF)
Dimensions
Approx. 122
×
36.5
×
15.5 mm
(4
7
/
8
×
1
7
/
16
×
5
/
8
in.) (w/h/d)
Mass
Approx. 255 g (9 oz.)
Supplied accessories
Disc magazine (1)
Parts for installation and connections (1 set)
Parts for installation and connections (1 set)
Design and specifications are subject to change without notice.
Ver 1.3 2002.03
9-870-222-14
Sony Corporation
2002C0500-1
e Vehicle Company
C
2002.03
Published by Sony Engineering Corporation
2
SERVICING NOTES
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.
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.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
other than those specified herein may result in hazardous ra-
diation exposure.
DISC MAGAZINE GETTING OUT PROCEDURE
ON THE POWER SUPPLY IS OFF
ON THE POWER SUPPLY IS OFF
Remove the COVER (LOWER.T) ass’y beforehand
1) Press the lever (ML.S) to arrow direction.
2) Removal the magazine assy.
2) Removal the magazine assy.
Note:
Take out the magazine only when the tray is completely within the
magazine. If the disk or tray is sticking out, turn on the power and
eject the magazine.
eject the magazine.
NOTES ON HANDLING THE OPTICAL PICK-
UP BLOCK OR BASE UNIT
UP BLOCK OR BASE UNIT
Lever (ML.S)
Magazine assy
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• 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.
AEP/UK model:
The CLASS 1 LASER PRODUCT label is
located on the rear exterior.
located on the rear exterior.
This label is located on the drive unit’s internal chassis.
When replacing the chassis (U.S) sub assy of mechanism deck
which have the “CAUTION LABEL” attached, please be sure to
put a new CAUTION LABEL (3-223-913-11) to the chassis (U.S)
sub assy.
which have the “CAUTION LABEL” attached, please be sure to
put a new CAUTION LABEL (3-223-913-11) to the chassis (U.S)
sub assy.
OPTICAL
PICK-UP
BLOCK
PICK-UP
BLOCK
SEMI-FIXED
RESISTOR
RESISTOR
The laser diode in the optical pick-up block may suffer electro-
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.
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.
US/Canadian model:
If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical
pick-up block.
CAUTION
INVISIBLE
DO NOT STARE INTO BEAM OR
VIEW DIRECTLY WITH OPTICAL INSTRUMENTS
LASER RADIATION WHEN OPEN
CLASS
PRODUCT
LASER
1
3
CDX-444RF
Ver 1.3
TABLE OF CONTENTS
SERVICING NOTES
..........................................................
2
1.
GENERAL
Location and Function of controls ..................................
4
Installation .......................................................................
8
Connections .....................................................................
9
2.
DISASSEMBLY
......................................................... 10
3.
MECHANISM DECK ASSEMBLY
................... 16
4.
MECHANICAL ADJUSTMENTS
....................... 18
5.
ELECTRICAL CHECK
.......................................... 19
6.
DIAGRAMS
6-1. Block Diagram – SERVO Section – .............................. 21
6-2. Block Diagram – MAIN Section – ................................ 22
6-3. Note for Printed Wiring Boards and
6-2. Block Diagram – MAIN Section – ................................ 22
6-3. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
6-4. Printed Wiring Boards – RF/LSW Boards – ................. 24
6-5. Schematic Diagram – RF/LSW Boards – ...................... 25
6-6. Printed Wiring Boards
6-5. Schematic Diagram – RF/LSW Boards – ...................... 25
6-6. Printed Wiring Boards
– MAIN Board (Component Side) – .............................. 26
6-7. Printed Wiring Boards
– MAIN (Conductor Side)/SW Boards – ....................... 27
6-8. Schematic Diagram – MAIN Board (1/2) – .................. 28
6-9. Schematic Diagram – MAIN (2/2)/SW Boards – ......... 29
6-10. Printed Wiring Boards – FM Board – ............................ 30
6-11. Schematic Diagram – FM Board – ................................. 31
6-12. IC Pin Function Description ........................................... 35
6-9. Schematic Diagram – MAIN (2/2)/SW Boards – ......... 29
6-10. Printed Wiring Boards – FM Board – ............................ 30
6-11. Schematic Diagram – FM Board – ................................. 31
6-12. IC Pin Function Description ........................................... 35
7.
EXPLODED VIEWS
................................................ 37
8.
ELECTRICAL PARTS LIST
............................... 43
TEST DISC
This set can playback a CD-R, CD-RW for audio use. When test
this set, use the following test disc.
Test disc for CD-R: TCD-R082LMT (Part No.: J-2502-063-1)
this set, use the following test disc.
Test disc for CD-R: TCD-R082LMT (Part No.: J-2502-063-1)
Notes on CD-R discs
You can play CD-Rs (recordable CDs)
designed for audio use on this unit.
designed for audio use on this unit.
Look for this mark to
distinguish CD-Rs for audio use.
distinguish CD-Rs for audio use.
This mark denotes that a disc is
not for audio use.
not for audio use.
Some CD-Rs (depending on the equipment
used for its recording or the condition of
the disc) may not play on this unit.
used for its recording or the condition of
the disc) may not play on this unit.
You cannot play a CD-R that is not
finalized
finalized
*
.
*
A process necessary for a recorded CD-R disc to
be played on the audio CD player.
be played on the audio CD player.
power supply cord
(J-2502-058-2)
(J-2502-058-2)
compact disc changer
RF output cord
(J-2502-058-1)
(J-2502-058-1)
wirerd remote commander
JIG ON REPAIRING
When repairing this set, connect the jig (cord) for RF output ex-
tract (Part No. J-2502-058-1) and power supply (Part No. J-2502-
058-2) as the figure shown below.
tract (Part No. J-2502-058-1) and power supply (Part No. J-2502-
058-2) as the figure shown below.
4
SECTION 1
GENERAL
This section is extracted from
instruction manual.
instruction manual.
Location and function of controls
Wired remote (RM-X82RF)/Télécommande à fil (RM-X82RF)
1 Touches DISC (sélection de disques)
2 Commande AMS (détecteur automatique de
musique/recherche manuelle)
Suivant le côté de la commande sur lequel vous
appuyez, vous pouvez sélectionner les
fonctions suivantes.
Suivant le côté de la commande sur lequel vous
appuyez, vous pouvez sélectionner les
fonctions suivantes.
3 Indication D-BASS
4 Indication REP (répétition de la lecture)
5 Indication SHUF (lecture aléatoire)
6 Indication DISC (numéro de disque)
Le numéro de disque indiqué correspond au
numéro de disque dans le chargeur de disques.
numéro de disque dans le chargeur de disques.
7 Indication TRACK (numéro de plage)
8 Indication MHz (fréquence)
9 Touche u (lecture/pause)
Si vous appuyez sur cette touche en cours de
lecture CD, le CD passe en mode de pause. Si
vous appuyez de nouveau sur cette touche, la
lecture CD reprend.
lecture CD, le CD passe en mode de pause. Si
vous appuyez de nouveau sur cette touche, la
lecture CD reprend.
0 Indication de lecture/pause
Tourne pendant la lecture d’un CD et clignote
lorsque la touche de pause est actionnée.
lorsque la touche de pause est actionnée.
qa Touche OFF (arrêt de la lecture de CD)
qs Touche D-BASS
qd Indication LEVEL (niveau de sortie)
qf Touche SHUF/REP (lecture aléatoire/lecture
répétée/mode de réglage)
1 DISC (disc select) buttons
2 AMS (Automatic Music Sensor/manual
search) control
Depending on which side of the control you
push down, you can select from the following
functions.
Depending on which side of the control you
push down, you can select from the following
functions.
3 D-BASS indication
4 REP (repeat play) indication
5 SHUF (shuffle play) indication
6 DISC (disc number) indication
The indicated disc number matches the disc
number in the disc magazine.
number in the disc magazine.
7 TRACK (track number) indication
AMS function
To locate the beginning of a track, push down
> to locate the beginning of the next track.
. to locate the beginning of the track currently played.
If you push down the control repeatedly, the beginnings of all following or
previous tracks will be located until the end of the disc is reached.
Manual search function
To quickly locate a desired point of a track, push down and hold
M to fast-forward.
m to fast-reverse.
The elapsed playing time of the track will be shown in the display window during
manual search.
To locate the beginning of a track, push down
> to locate the beginning of the next track.
. to locate the beginning of the track currently played.
If you push down the control repeatedly, the beginnings of all following or
previous tracks will be located until the end of the disc is reached.
Manual search function
To quickly locate a desired point of a track, push down and hold
M to fast-forward.
m to fast-reverse.
The elapsed playing time of the track will be shown in the display window during
manual search.
Disc select function
To select a desired disc, press momentarily
To select a desired disc, press momentarily
to select the next disc.
to select the previous disc.
to select the previous disc.
Fonction AMS
Pour localiser le début d’une plage, appuyez sur
> pour localiser le début de la plage suivante.
. pour localiser le début de la plage en cours.
Si vous appuyez plusieurs fois de suite sur la commande, le début de chacune des
plages précédentes ou des suivantes est localisé jusqu’à la fin du disque.
Fonction de recherche manuelle
Pour localiser rapidement un point désiré d’une plage, maintenez enfoncé
M pour avancer rapidement.
m pour reculer rapidement.
La durée écoulée de la plage apparaît sur l’afficheur pendant la recherche
manuelle.
Pour localiser le début d’une plage, appuyez sur
> pour localiser le début de la plage suivante.
. pour localiser le début de la plage en cours.
Si vous appuyez plusieurs fois de suite sur la commande, le début de chacune des
plages précédentes ou des suivantes est localisé jusqu’à la fin du disque.
Fonction de recherche manuelle
Pour localiser rapidement un point désiré d’une plage, maintenez enfoncé
M pour avancer rapidement.
m pour reculer rapidement.
La durée écoulée de la plage apparaît sur l’afficheur pendant la recherche
manuelle.
Fonction de sélection de disques
Quand vous voulez sélectionner un disque, appuyez momentanément sur
Quand vous voulez sélectionner un disque, appuyez momentanément sur
pour choisir le disque suivant.
pour choisir le disque précédent.
pour choisir le disque précédent.
Nomenclature
8 MHz (frequency) indication
9
u (play/pause) button
If pressed during CD playback, the CD will
pause. If pressed again, CD playback will
continue.
If pressed during CD playback, the CD will
pause. If pressed again, CD playback will
continue.
0 Play/pause indication
Turns around during CD playback and
flashes when the pause button is pressed.
flashes when the pause button is pressed.
qa OFF button
qs D-BASS button
qd LEVEL (output level) indication
qf SHUF/REP (shuffle play/repeat play/
control mode set) button