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SAVA-7
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
SERVICE MANUAL
MICROFILM
ACTIVE SURROUND SPEAKER SYSTEM
SPECIFICATIONS


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TABLE OF CONTENTS
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
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE
! SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
After correcting the original service problem, perform the
following safety checks 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
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 microampers).
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 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µF
1.5k
AC
voltmeter
(0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
1.
GENERAL ········································································· 3
2.
DISASSEMBLY
2-1.
GRILLE FRAME ASSY,
FRONT PANEL ASSY, FRONT SPEAKER ····················· 4
2-2.
TOP GRILLE ASSY, TOP SPEAKER ······························· 4
2-3.
STAND ASSY, BOTTOM GRILLE,
BOTTOM SPEAKER ························································ 5
3.
DIAGRAMS
3-1.
CIRCUIT BOARDS LOCATION ······································ 6
3-2.
SCHEMATIC DIAGRAM ­ MAIN SECTION ­ ·············· 7
3-3.
PRINTED WIRING BOARD ­ MAIN SECTION ­ ······· 11
3-4.
SCHEMATIC DIAGRAM ­ DISPLAY SECTION ­ ········ 14
3-5.
PRINTED WIRING BOARD ­ DISPLAY SECTION ­ ··· 16
3-6.
IC PIN FUNCTIONS ······················································· 17
3-7.
IC BLOCK DIAGRAMS ················································· 18
4.
EXPLODED VIEWS
4-1.
SYSTEM (L) ASSY FRONT ··········································· 20
4-2.
SYSTEM (L) ASSY BACK ············································· 21
4-3.
SYSTEM (R) ASSY FRONT ··········································· 22
4-4.
SYSTEM (R) ASSY BACK ············································· 23
5.
ELECTRICAL PARTS LIST ········································· 24


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SAVA-7
-- 3 --
-- 4 --
-- 5 --
-- 6 --
SECTION 1
GENERAL
SECTION 2
DISASSEMBLY
SECTION 3
DIAGRAMS
1.
GRILLE FRAME ASSY, FRONT PANEL ASSY, FRONT SPEAKER
2.
TOP GRILLE ASSY, TOP SPEAKER
3.
STAND ASSY, BOTTOM GRILLE, BOTTOM SPEAKER
3-1.
CIRCUIT BOARDS LOCATION
Remove the cacher by prying it up
using
` No.0 head screw driver tip.
9 Speaker (7 cm)
8 Tapping
3.5
× 12
4 Tapping
3.5
× 12
0 Tapping
3.5
× 12
!¡ Speaker
(8 cm)
7 Front panel assy
6 Tapping
3.5
× 12
5 Tapping
3.5
× 12
3 Cacher
2 Cacher
1 Grille frame assy
1 Top grille
2 Tapping
3.5
×12
3 Speaker
(7 cm)
Remove the top grille by
lifting it up with the inserted
flat head
' screwdriver tip.
A
4 Tapping
3.5
× 12
3 Bottom
grille
2 Tapping
3.5
× 12
1 Stand assy
(Open in the
direction of
the arrow.)
5 Tapping
3.5
× 12
6 Speaker
(10 cm)
DOLBY board
VOLUME board
POWER
board
DISPLAY board
SWITCH
board
PS board
T1 board
T2 board
CONNECTOR
board
Note : Follow the disassembly procedure in the numerical order given.
This section is extracted
from instruction manual.


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