Sony CDX-454RF - Compact Disc Changer System, Service Manual

Page: 2 / 50

2
CDX-454RF/454XRF
TABLE OF CONTENTS
1. SERVICING NOTES
................................................ 3
2. GENERAL
Location of controls ........................................................ 4
Installation ....................................................................... 5
Connections ..................................................................... 7
3. DISASSEMBLY
3-1. Disassembly Flow .......................................................... 8
3-2. Case (Upper. T), Front Panel Assy ................................. 9
3-3. Mechanism Deck (MG-251A-137) ................................ 9
3-4. FM Board ........................................................................ 10
3-5. MAIN Board, Slide Variable Resistor
(Elevator Height Sensor) (RV202) ................................. 10
3-6. ELJ Motor Assy (Elevator) (M104) ................................ 11
3-7. Escutcheon (T) ................................................................ 11
3-8. Chassis (U.S) Sub Assy .................................................. 12
3-9. Chassis assy ..................................................................... 12
3-10. RF Board ......................................................................... 13
3-11. Sled Motor Assy (251) (M101),
Optical Pick-up (KSS-720A) .......................................... 13
3-12. LSW Board, Spindle Motor (S) Sub Assy (M102) ........ 14
3-13. ELJ Motor Assy (Chucking) (M103) ............................. 14
4. ASSEMBLY
4-1. Assembly Flow ................................................................ 15
4-2. Optical Pick-up Complete Assy ...................................... 15
4-3. Gear (Lomini)/(Load 1) Assy ......................................... 16
4-4. Operation Check ............................................................. 16
5. MECHANICAL ADJUSTMENTS
....................... 17
6. ELECTRICAL CHECK
.......................................... 18
7. DIAGRAMS
7-1. Block Diagram – SERVO Section – .............................. 21
7-2. Block Diagram – MAIN Section – ................................ 22
7-3. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
7-4. Printed Wiring Boards – RF/LSW Boards – ................. 24
7-5. Schematic Diagram – RF/LSW Boards – ...................... 25
7-6. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 26
7-7. Printed Wiring Boards
– MAIN (Conductor Side)/SW Boards – ....................... 27
7-8. Schematic Diagram – MAIN Board (1/2) – .................. 28
7-9. Schematic Diagram – MAIN (2/2)/SW Boards – ......... 29
7-10. Printed Wiring Board – FM Board – ............................. 30
7-11. Schematic Diagram – FM Board – ................................. 31
7-12. IC Pin Function Description ........................................... 36
8. EXPLODED VIEWS
8-1. General Section-1 ............................................................ 38
8-2. General Section-2 ............................................................ 39
8-3. Mechanism Deck Section-1 (MG-251A-137) ................ 40
8-4. Mechanism Deck Section-2 (MG-251A-137) ................ 41
8-5. Mechanism Deck Section-3 (MG-251A-137) ................ 42
8-6. Mechanism Deck Section-4 (MG-251A-137) ................ 43
9. ELECTRICAL PARTS LIST
............................... 44
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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.
OPTICAL
PICK-UP
BLOCK
SEMI-FIXED
RESISTOR
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.