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After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
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 manufacturersÕ 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 ÒlimitÓ 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 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µF
1.5 k ½
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
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.
Flexible Circuit Board Repairing
¥ Keep the temperature of soldering iron around 270ûC
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
Ë LA SƒCURITƒ!
LES COMPOSANTS IDENTIFƒS PAR UNE MARQUE ! SUR LES
DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT
CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY
DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU
DANS LES SUPPƒMENTS PUBLIƒS PAR SONY.
General
Power requirements 120V AC, 60Hz
Power consumption 135W
Dimensions (w/h/d) Approx. 355 ´ 425 ´ 442 mm
(14 ´ 16
3/4 ´ 17 1/2 in) incl. projecting patrs and
controls
Mass Approx. 13.1kg (28 lb 14 oz.)
Supplied accessories: AM loop antenna (1)
Remote RM-SG7B(1)
FM wire antenna (1)
Design and specifications are subject to change without notice.
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TABLE OF CONTENTS
1. GENERAL
ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááááááááááá 4
2. DISASSEMBLY
2-1. Top Cover ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááááááááá 5
2-2. Front Panel Assy ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááá 5
2-3. Main Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááááááá 6
2-4. Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááááá 6
2-5. CD Mechanism Deck Section áááááááááááááááááááááááááááááááááááááááááááá 7
2-6. Tape Mechanism Deck Section áááááááááááááááááááááááááááááááááááááááááá 7
2-7. Cassette Doors ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááááá 8
2-8. CD Chassis Assy ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááá 8
2-9. Base Unit ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááááááááááááá 9
2-10. Turn Table ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááááááááá 9
3. MECHANICAL ADJUSTMENTS ááááááááááááááááááááááááááááá 10
4. ELECTRICAL ADJUSTMENTS ááááááááááááááááááááááááááááááá 10
5. DIAGRAMS
5-1. Ciecuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\
15
5-2. Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááá 17
Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááá 17
Tuner/CD Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááá 19
5-3. Printed Wiring Board Main Section ááááááááááááááááááááááááááááá 21
5-4. Schematic Diagram Main (1/3) Section ááááááááááááááááááááááá 23
5-5. Schematic Diagram Main (2/3) Section ááááááááááááááááááááááá 25
5-6. Schematic Diagram Main (3/3) Section ááááááááááááááááááááááá 27
5-7. Printed Wiring Board Amp Section áááááááááááááááááááááááááááááá 29
5-8. Schematic Diagram Amp Section ááááááááááááááááááááááááááááááááá 31
5-9. Printed Wiring Board CD Decoder Section ááááááááááááááááá 33
5-10. Schematic Diagram CD Decoder Section áááááááááááááááááááá 35
5-11. Printed Wiring Board Front Section ááááááááááááááááááááááááááááá 37
5-12. Schematic Diagram Front (1/2) Section ááááááááááááááááááááááá 39
5-13. Schematic Diagram Front (2/2) Section ááááááááááááááááááááááá 41
5-14. IC Pin Function Description ááááááááááááááááááááááááááááááááááááááááááááá 43
5-15. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááá 45
6. EXPLODED VIEWS
6-1. Top Cover Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááá 47
6-2. CD Door Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááá 48
6-3. Panel Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááááá 49
6-4. Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááá 50
7. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááááááá 51
