AIR-SA10
2
1.
SERVICING NOTES
............................................. 3
2. GENERAL
.................................................................. 4
3. DISASSEMBLY
3-1. Disassembly
Flow
........................................................... 5
3-2. Top Panel Block .............................................................. 6
3-3. HP Board, Front Panel Block .......................................... 7
3-4. Speaker (6.5 cm) (SP101: L-CH/SP201: R-CH) ............ 7
3-5. S-AIR RX-IF Board, KEY Board, MAIN Board............ 8
3-6. REG Board, Power Transformer (PT901),
Power
Cord
.....................................................................
9
3-7. AMP Board, LCD Board ................................................ 9
4.
TEST MODE
............................................................ 10
5.
ELECTRICAL CHECK
......................................... 10
6. DIAGRAMS
6-1. Printed Wiring Board - S-AIR RX-IF Board - ................ 12
6-2. Schematic Diagram - S-AIR RX-IF Board - .................. 13
6-3. Printed Wiring Boards - AMP Section -.......................... 14
6-4. Schematic Diagram - AMP Section - .............................. 15
6-5. Printed Wiring Boards - PANEL Section - ..................... 16
6-6. Schematic Diagram - PANEL Section - .......................... 17
6-7. Printed Wiring Board - MAIN Board - ........................... 18
6-8. Printed Wiring Boards - POWER SUPPLY Section - .... 19
6-9. Schematic Diagram - MAIN Section - ........................... 20
7.
EXPLODED VIEWS
7-1. Overall
Section
............................................................... 24
7-2. Top Panel Section ........................................................... 25
7-3. Front Panel Section ......................................................... 26
7-4. Rear Panel Section .......................................................... 27
8.
ELECTRICAL PARTS LIST
.............................. 28
TABLE OF CONTENTS
SAFETY-RELATED COMPONET 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.
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 FONC-
TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS 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 dam-
aged by heat.
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” 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)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
μ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
