Sony SAVA-10 Service manual
SA-VA10
SERVICE MANUAL
• REAR SPEAKER
SPECIFICATIONS
• FRONT SPEAKER SYSTEM
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
MICROFILM
— Continued on next page —
HOME THEATER ACTIVE
SPEAKER SYSTEM
— 1 —
TABLE OF CONTENTS
1. GENERAL .................................................................... 4
2. DISASSEMBLY
2-1. Amplifier Assembly .............................................................5
3. DIAGRAMS
3-1. IC Pin Function
• IC501 System Control (µPD78042FGF-016-3B9) ...........6
3-2. Circuit Boards Location .......................................................7
3-3. Schematic Diagram ..............................................................9
3-4. Printed Wiring Board..........................................................13
3-5. IC Block Diagrams ............................................................. 17
4. EXPLODED VIEWS
4-1. Cabinet (L) Assembly.........................................................19
4-2. Cabinet (R) Assembly ........................................................20
4-3. Amplifier Section ...............................................................21
4-4. Rear Speaker Section (SS-SR151) .....................................22
5. ELECTRICAL PARTS LIST ..................................23
SER VICE NOTE
[FL ALL LIGHT UP MODE]
While pressing the MASTER VOL+ button, press the POWER
button.
[AUTO POWER SAVE MECHANISM]
A part circuit on this will stop to economize in power if it has no
signal after more than three minutes.
If a sound is input again, the normal circuit will operated.
— 2 —
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
SAFETY CHECK-OUT
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 acr oss a resistor by means of a V OM
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)
To Exposed Metal
Parts on Set
4-982-965-0 : US, E1 model
4-982-965-1 : Canadian model
4-982-965-2 : AEP, E2, German model
4-982-965-3 : UK model
4-982-965-4 : Australian model
• Abbreviation
E1 : Central and South America model
E2 : Singapore, Malaysia model
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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.
0.15µF
1.5k
Ω
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
LES COMPOSANTS IDENTIFIÉS P AR 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 PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
À LA SÉCURITÉ!!
— 3 —
LOCATION OF CONTROLS
SECTION 1
GENERAL
Front panel
1
2
3
4
1STANDBY indica tor (red)
2 POWER indicator (red/green)
3 POWER button
4 INPUT button
5 SURROUND button
6 CENTER MODE button
7 S. WOOFER button
8 MASTER VOL buttons
5678
Remote
1
2
3
4
5
6
7
8
9
0
!¡
!™
!£
!¢
!∞
!§
!¶
!•
!ª
@º
This section is extracted from
instruction manual.
1 MUTING button
2 Operate a Sony TV buttons
3 DOLBY SUR button
4 HALL button
5 REAR +/– buttons
6 CENTER +/– buttons
7 BASS +/– buttons
8 BALANCE
9 INPUT 1 button
0 INPUT 2 button
!¡ POWER button
!™ GAME button
!£ SUR OFF button
!¢ S. WOOFER +/– buttons
!∞ TEST TONE button
!§ DELAY button
!¶ TREBLE +/– button
!° RESET button
!ª SUPER WOOFER MODE buttons
(1, 2, OFF)
@º MASTER VOL buttons
L
/R buttons
— 4 —
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. AMPLIFIER ASSEMBLY
3
Flat type wire
(27core)
SECTION 2
9
Back panel (L)
6
Three screws
(BVTP4x20)
8
Seven
screws
(BVTP3x10)
1
Grille flame
assembly
2
Four screws
(BVTP4x20)
4
Connector
(CN903)
5
Two screws
(BVTT4x20)
!¡
Amplifier assembly
0
Connector
(CN602)
7
Three screws
(BVTP4x20)
— 5 —
3-1. IC PIN FUNCTION
• IC501 System Control (µPD78042FGF-016-3B9)
Pin No.
1 to 7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37 to 40
41
Pin Name
7G to 1G
VDD
POWER RY
FUNC 1/2
PLO/DELAY-CLK
PLO/DELAY-CE
PLO/DELAY-DATA
FRONT MUT
CENTER EXT MUT
S/W MUT
RESET
REAR MUT
CENTER MUT
AVSS
CENTER EXT/INT
—
MODE
VOL SCL
—
SW1
KEY 1
KEY 0
AVDD
AVREF
STOP
XT2
VSS
X1
X2
S/W BOOST
S/W C1 to S/W C4
CENTER EXT-SW
I/O
FL grid control
O
Power supply terminal (+5V)
—
Power relay control
O
Input select control (L: input 2 H: input 1)
O
O
Prologic/Delay IC (IC103) serial control
O
O
O
Mute control (“L”=Mute)
O
O
System reset
I
O
Mute control (“L”=Mute)
O
Ground for A/D convertor
—
Center speaker switching control
O
—
Not used (Connected to ground)
—
Audio processor IC (IC203, 204) serial control
O
Not used (Connected to ground)
—
Audio signal detection (L: Sound input H: No sound input)
I
I
Key input (analog)
I
Analog power supply for A/D convertor
—
Reference voltage for A/D convertor (Connected to +5V)
—
Voltage detect (AC off)
I
Not used (Open)
—
Ground
—
I
Oscillation crystal (5 MHz) for main system clock
O
Sub woofer boost control (H: off L: on)
O
Super woofer level control
O
Connecting detection of external center output
I
(L: Connecting signal input H: No connecting signal input)
SECTION 3
DIAGRAMS
Function
• Abbreviation
FL : Fluorescent indicator tube
— 6 —
Pin No.
42, 43
44
45
46
47
48
49
50
51
52
53 to 70
71
72 to 77
78 to 80
Pin Name
—
SIRCS
VOL SDA-2
VOL SDA-1
—
IC
STANDBY LED
OPRATE LED
READY LED
VDD
S24 to S27
VLOAD
S6 to S1
10G to 8G
3-2. CIRCUIT BOARDS LOCATION
NOTE
rA : POW-R board
rB : POW-L board
rC : POW-SR board
rD : POW-CN board
rE : POW-SW board
rF : INPUT board
I/O
Not used (Connected to ground)
—
Remote control signal input
I
O
Audio processor IC (IC203, 204) serial control
O
Not used (Connected to ground)
—
Internal connecting (Connected to ground)
—
O
LED control (L: Lighting)
O
O
Power supply (+5V)
—
FL segment control
O
Power supply (–25V) for indication control
—
FL segment control
O
FL grid control
O
Cabinet (L)
Function
POWER board
(including rA – rE)
T2 board
T1 board
DISPLAY board
P.S. board
r
MAIN board
(including rF)
Cabinet (R)
R-SP board
A
r
B
r
C
r
D
r
E
r
F
— 7 —
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