Sony CDX-424-RF Service manual
CDX-424RF
SERVICE MANUAL
SPECIFICATIONS
US Model
Canadian Model
E Model
Model Name Using Similar Mechanism CDX-505RF
CD Drive Mechanism Type MG-250C-137
Optical Pick-up Name KSS-521A/J2N
MICROFILM
COMPACT DISC CHANGER SYSTEM
SECTION 1
y
SERVICING NOTES
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 2
2. GENERAL
Installation....................................................................... 3
Connections ..................................................................... 4
Location and Function of Controls................................. 6
3. DISASSEMBLY ......................................................... 7
4. MECHANISM DECK ASSEMBLY..................... 13
5. MECHANICAL ADJUSTMENTS....................... 15
6. ELECTRICAL ADJUSTMENTS......................... 16
7. DIAGRAMS
7-1. Notes for Printed Wiring Board and
Schematic Diagram ......................................................... 18
7-2. Printed Wiring Boards – RF Section – .......................... 19
7-3. Schematic Diagram – RF Section –................................ 21
7-4. Printed Wiring Boards
– MAIN (Component Side) /JACK Board – .................. 23
7-5. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 25
7-6. Schematic Diagram – MAIN Section (1/2) –................. 27
7-7. Schematic Diagram – MAIN Section (2/2) –................. 29
7-8. IC Pin Function Description ........................................... 35
8. EXPLODED VIEWS ................................................ 37
9. ELECTRICAL PARTS LIST ............................... 43
NOTES ON HANDLING THE OPTICAL PICKUP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic 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.
Laser Diode Properites
• Material: GaAlAs
• Wavelength: 780 nm
• Emission Duration: continuous
• Laser Output Power: less than 44.6 µW*
* This output is the value measured at a distance of 200 mm
from the objective lens surface on the Optical Pick-up Block.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C during 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-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
DISC MAGAZINE GETTING OUT PROCEDURE
ON THE POWER SUPPLY IS OFF
Remove the CASE (LOWER) assembly beforehand
1) Press the lever (ML) assy to arrow direction.
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.
Lever (ML) ass’
Magazine ass’y
– 2 –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
– 3 –
– 4 –
– 5 –
– 6 –
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
COVER (UPPER), FRONT PANEL ASS’Y
1
screw
(PTT2.6 × 6)
3
lever (FL)
1
screw
(PTT2.6 × 6)
1
screw
(PTT2.6 × 6)
2
cover (upper)
1
3
lever (FL)
screw
(PTT2.6 × 6)
4
front panel ass’y
MECHANISM DECK (MG-250C-137)
2
tension spring (FL)
1
two dampers (250)
1
screw
(PTT2.6 × 6)
4
mechanism deck (MG-250C-137)
2
tension spring (FL)
3
jack flexible board
(CNJ901)
– 7 –
1
two dampers (250)
JACK BOARD
)
Remove the jack board of
the arrow.
1
ground point screw
(PTT2.6
×
6)
2
jack board
MAIN BOARD
1
main flexible board
(CNJ12)
6
three screws (FP)
7
main board
2
connector
(CNP301)
5
two precision screws
×
2.5)
(P1.7
– 8 –
4
heat sink
3
screw
(BVTT2
×
4
ELEVATOR MOTOR ASS’Y (M104)
y
1
screw
(PTT2
×
3)
2
bracket (EVM)
3
elevator motor ass’
(M104)
ESCUTCHEON
2
4
Remove the claw
of the arrow
Remove the ditch
of the arrow
Remove the escutcheon
5
of the arrow
A
B
.
.
C
3
two claws
A
B
.
3
claw
C
4
ditch
1
– 9 –
screw
(M2
×
3)
CASE (UPPER) ASS’Y
s
s
1
three screws
(PTT2 × 4)
Remove the case
4
(upper) ass’y of
the arrow B.
1
screw
(PTT2 × 4)
2
B
A
3
Remove the edge
of the arrow A.
1
two screw
(PTT2 × 4)
CHASSIS ASS’Y
3
chassis ass’y
2
2
1
two polyethylene washer
– 10 –
RF BOARD
2
two screws
(PS2
1
OP flexible board
×
4)
(CNJ11)
2
two screws
(PS2
×
4)
4
connector
(CNP52)
3
4
two connectors
(CNP11, 53)
5
RF board
SLED MOTOR ASS’Y (M102), OPTICAL PICK-UP (KSS-521A/J2N)
1
two screws
(ESCUTCHEON)
4
Turn at the direction of the
arrow, then remove
shaft (sled) ass’y.
2
sled motor ass’y
(M102)
3
optical pick-up
(KSS-521A/J2N)
– 11 –
SW BOARD, SPINDLE MOTOR ASS’Y (M101)
)
8
two screws
×
2.2)
(P1.7
1
screw
×
2.2)
(P2
2
SW board
7
3
spring (chucking)
6
retainer (disc
4
screw
5
bracket (CP)
9
Remove the spindle motor ass’y (M101)
of the arrow.
(P2
×
2.2)
CHUCKING MOTOR ASS’Y (M103)
3
retainer (CHM)
2
two screws (P2 × 2.5)
4
chucking motor ass’y
(M103)
1
– 12 –
connector
(CNP51)
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