Table Of Contents - Sony ICF-CD523 Service Manual

ICF-CD523
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
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" 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)
To Exposed Metal
Parts on Set
0.15 µ F
Fig. A. Using an AC voltmeter to check AC leakage.
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 PUBLISHED BY SONY.
2
AC
1.5 k Ω
voltmeter
(0.75 V)
Earth Ground

TABLE OF CONTENTS

1. SERVICING NOTES
2. GENERAL
................................................................... 4
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 5
3-2. Cabinet (Upper) ............................................................... 6
3-3. Cabinet (Front) Assy ....................................................... 6
3-4. CD Mechanism Deck (FLM-CD523-197) ...................... 7
3-5. MAIN Board .................................................................... 7
3-6. Chuck Plate Assy ............................................................. 8
3-7. Tray .................................................................................. 8
3-8. LOADING Board ............................................................ 9
3-9. Base Unit Assy ................................................................ 9
3-10. Optical Pick-Up Block (KSM-213CCP) ......................... 10
3-11. Optical Pick-Up (KSS-213C) .......................................... 10
4. TEST MODE
.............................................................. 11
5. ELECTRICAL ADJUSTMENTS
6. DIAGRAMS
6-1. Printed Wiring Board - MAIN Section - ........................ 18
6-2. Printed Wiring Boards - PANEL Section - ..................... 19
6-3. Schematic Diagram - MAIN Section (1/4) - ................. 20
6-4. Schematic Diagram - MAIN Section (2/4) - ................. 21
6-5. Schematic Diagram - MAIN Section (3/4) - ................. 22
6-6. Schematic Diagram - MAIN Section (4/4) - ................. 23
6-7. Printed Wiring Boards
- MOTOR/VOLUME/TRANS Section - ....................... 24
7. EXPLODED VIEWS
7-1. Cabinet (Upper), Chassis Section .................................... 32
7-2. Cabinet (Front) Section ................................................... 33
7-3. Cabinet (Lower) Section .................................................. 34
7-4. CD Mechanism Deck Section
(FLM-CD523-197) .......................................................... 35
7-5. Base Unit Section (FLM-CD523-197) ............................ 36
7-6. Optical Pick-Up Section (KSM-213CCP) ....................... 37
8. ELECTRICAL PARTS LIST
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.
............................................... 3
......................... 13
................................ 38