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SCD-C222ES
TABLE OF CONTENTS
1. SERVICING NOTES
............................................... 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 8
3-2. Case ................................................................................. 9
3-3. Front Panel Section ......................................................... 9
3-4. CD Mechanism Deck (CDM59A-DVBU5A) ................ 10
3-5. AUDIO Board ................................................................. 10
3-6. POWER Board ................................................................ 11
3-7. MAIN Board ................................................................... 11
3-8. Base Unit (DVBU5A) ..................................................... 12
3-9. Table Assy ....................................................................... 12
3-10. SENSOR Board ............................................................... 13
3-11. LOADING MOTOR Board ............................................ 13
4. ASSEMBLY ................................................................. 14
5. TEST MODE .............................................................. 15
6. DIAGRAMS
6-1. Block Diagram -“ RF/SERVO Section -“ ........................ 30
6-2. Block Diagram -“ SERVO Section -“ .............................. 31
6-3. Block Diagram -“ MAIN Section -“ ................................ 32
6-4. Block Diagram -“ AUDIO Section -“ .............................. 33
6-5. Block Diagram -“ DISPLAY/KEY CONTROL/
POWER SUPPLY Section -“ ........................................... 34
6-6. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 35
6-7. Printed Wiring Board -“ RF Board -“ .............................. 36
6-8. Schematic Diagram -“ RF Board -“ ................................. 37
6-9. Printed Wiring Boards
-“ MOTOR/SENSOR Section -“ ....................................... 38
6-10. Schematic Diagram -“ MOTOR/SENSOR Section -“ .... 39
6-11. Printed Wiring Board
-“ MAIN Board (Component Side) -“ .............................. 40
6-12. Printed Wiring Board
-“ MAIN Board (Conductor Side) -“ ................................ 41
6-13. Schematic Diagram -“ MAIN Board (1/5) -“ ................. 42
6-14. Schematic Diagram -“ MAIN Board (2/5) -“ .................. 43
6-15. Schematic Diagram -“ MAIN Board (3/5) -“ .................. 44
6-16. Schematic Diagram -“ MAIN Board (4/5) -“ .................. 45
6-17. Schematic Diagram -“ MAIN Board (5/5) -“ .................. 46
6-18. Schematic Diagram
-“ AUDIO/HEADPHONE Boards -“ ................................ 47
6-19. Printed Wiring Board
-“ AUDIO Board (Component Side) -“ ............................ 48
6-20. Printed Wiring Boards -“ AUDIO (Conductor Side)/
HEADPHONE Boards -“ ................................................. 49
6-21. Printed Wiring Boards
-“ DISPLAY/KEY/LED/RM Boards -“ ............................ 50
6-22. Schematic Diagram
-“ DISPLAY/KEY/LED/RM Boards -“ ............................ 51
6-23. Printed Wiring Boards -“ POWER/REG Boards -“ ......... 52
6-24. Printed Wiring Boards -“ POWER SW/PT Boards -“ ..... 53
6-25. Schematic Diagram
-“ POWER/POWER SW/PT/REG Boards -“ ................... 54
6-26. IC Pin Function Description ........................................... 63
7. EXPLODED VIEWS
7-1. Case Section .................................................................... 79
7-2. Front Panel Section ......................................................... 80
7-3. Chassis Section ............................................................... 81
7-4. CD Mechanism Deck Section-1
(CDM59A-DVBU5A) ..................................................... 82
7-5. CD Mechanism Deck Section-2
(CDM59A-DVBU5A) ..................................................... 83
7-6. Base Unit Section (DVBU5A) ........................................ 84
8. ELECTRICAL PARTS LIST ............................... 85
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SCD-C222ES
This label is located on the LEFT exterior.
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 ËšC 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.CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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 µF AC
voltmete r (0.75 V) To Exposed Metal
Parts on Set
Earth Ground
ATTENTION AU COMPOSANT AYANT RAPPORT
Ã- 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.
