Sony SAVA-29 Service manual
SAVA-29
SERVICE MANUAL
(Center) (Rear) (L-ch) (R-ch)
This unit is composed of the front speaker and the following units.
REAR SPEAKER
EXTERNAL CENTER SPEAKER
SS-SR171
SS-CN15AV
SPECIFICATIONS
US Model
Canadian Model
E Model
MICROFILM
— Continued on next page —
HOME THEATER ACTIVE SPEAKER SYSTEM
T ABLE OF CONTENTS
TEST MODE······································································ 3
1. GENERAL ·········································································· 4
2. DISASSEMBLY
2-1. Removal Amplifier Block···················································5
3. DIAGRAMS
3-1. Circuit Boards Location ····················································· 6
3-2. Schematic Diagram —Dolby Section — ··························· 7
3-3. Printed Wiring Board —Dolby Section —························· 9
3-4. Schematic Diagram —Display Section — ······················· 11
3-5. Printed Wiring Board —Display Section — ···················· 13
3-6. Schematic Diagram —Power Section — ························· 15
3-7. Printed Wiring Board —Power Section — ······················ 17
3-8. Schematic Diagram —Power Transformer Section — ···· 19
3-9. Printed Wiring Board —Power Transformer Section —··21
3-10. Printed Wiring Board —Main Section — ························ 23
3-11. Schematic Diagram—Main Section (1/2) — ··················· 25
3-12. Schematic Diagram —Main Section (2/2) — ················· 27
3-13. IC Pin Function ································································ 29
3-14. IC Block Diagrams ··························································· 30
4. EXPLODED VIEWS
4-1. System (L) Assy ······························································· 32
4-2. System (R) Assy ······························································· 33
4-3. Amplifier Section ·····························································34
4-4. Rear Speaker Section························································35
4-5. Center Speaker Section ···················································· 36
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 A C leakage. Check leakage as
described below.
LEAKAGE
The AC leaka ge 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. Follo w the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
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
5. ELECTRICAL PARTS LIST ······································· 37
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC v oltmeter . The “limit” indication
is 0.75 V, so analog meters must have an accurate lo w-v oltage
scale. The Simpson 250 and Sanwa SH-63Trd are e xamples 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
AC
0.15
µ
F 1.5k
Ω
Earth Ground
Fig. A. Using an AC voltmeter to check A C leakage.
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 P AR SONY.
À LA SÉCURITÉ!
voltmeter
(0.75V)
— 2 —
TEST MODE
MODE ALL FLUORESCENT INDICATOR TUBES
LIGHT
When the A C plug is inserted to the power outlet with pr essing the
MASTER V OL + button and S.WOOFER button displa yed model
name, after the all fluorescent indicator tubes light.
KEY CHECK MODE
1. Pull out the AC plug from the power outlet and turn the power
OFF.
2. Connect the lead wire to TP3 and TP4 on the KEY board.
3. Insert the AC plug to the power outlet and set to STANDBY
mode.
4. Let the lead wire short TP3 and TP4.
5. Fluorescent indicator tube displayed “KEY CHK 29” , and enter
the key check mode.
6. Pressing any buttons, the number of button will be displayed on
the fluorescent indicator tube.
7. After all buttons are pressed, it will be in the ST ANDBY mode .
Button
I /
u
MASTER VOL –
MASTER VOL +
INPUT
SURROUND
CENTER MODE
S.WOOFER
Button Number
1
2
3
4
5
6
7
LED Color
Red
Green
Red
Green
Red
Green
Red
• Parts Location
[KEY BOARD] — SOLDELING side —
CN552
IC513
S506
S505
TP1 TP3
TP2
TP4
Note:
1. The LED (D505)lights while pressing each button.
The LED lights in red when even number of buttons are pressed ,
and it lights in green when odd number of buttons are pressed.
2. The LED lights even when the pressed button is pressed again.
AMP CHECK MODE
1. Pull out the AC plug from the power outlet and turn the power
OFF.
2. Connect the lead wire to TP1 and TP2 on the KEY board.
3. Insert the AC plug to the power outlet and set to STANDBY
mode.
4. Let the lead wire connected TP1 and TP2.
5. Fluorescent indicator tube displayed “ AMP CHK 29” or “ AMP
CHK 59”, and enter the amp check mode.
6. The chek step advances in order as TP1 and TP2 are shorted.
7. To e xit the test mode, disconnect the AC plug from power outlet.
STEP
AMP CHK 29 or 59
0
AMP CHK 1
1
AMP CHK 2
2
AMP CHK 3
3
AMP CHK 4
4
AMP CHK 5
5
AMP CHK 6
6
AMP CHK 7
7
AMP CHK 8
8
AMP CHK 9
9
AMP CHK 10
10
AMP CHK 11
11
AMP CHK 12
12
*
* The step 13 is the AUTO POWER ON/OFF check.
13
AMP CHK 13
INPUT
1
1
1
1
1
1
1
1
1
1
2
2
5.1
2
VOL
MIN
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MIN
MAX
MAX
MAX
MAX
MAX
SW MODE
1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1
2
1
1
1
1
SUR MODE
PRO LOGIC
OFF
OFF
OFF
PRO LOGIC
PRO LOGIC
PRO LOGIC
GAME
OFF
OFF
PRO LOGIC
PRO LOGIC
–
PRO LOGIC
BASS
0
0
–5
+5
–5
+5
0
0
0
0
0
0
0
0
TREBLE
0
0
–5
+5
–5
+5
0
0
0
0
0
0
0
0
— 3 —
SECTION 1
GENERAL
6
3
44
1
2
2
5
1 LEFT CHANNEL SPEAKER/CENTER
CHANNEL WOOFER
2 CENTER CHANNEL TWEETERS
3 RIGHT CHANNEL SPEAKER/CENTER
CHANNEL WOOFER
4 SUPER WOOFER
5 REAR SPEAKER
6 EXTERNAL CENTER SPEAKER
REMOTE COMMANDER
FRONT SPEAKER (L-CH)
— 4 —
SECTION 2
DISASSEMBLY
SECTION 3
SAVA-29
DIAGRAM
2-1. REMOVAL AMPLIFIER BLOCK (FRONT SPEAKER: L-CH)
7
5
Four screws
(4
×
20)
6
Flat type wire
1
Grill frame assy
Display panel assy
!ª
Amplifier
!•
Screw
!¶
(M4
×
16)
8
Three screws
(4
×
25)
9
T wo screws
(M4
!∞
Connector
3-1. CIRCUIT BOARDS LOCATION
POWER board
INPUT board
DOLBY board
REG board
×
16)
!§
Back panel
DISPLAY board
MAIN board
KEY board
POW-SR board
POW-CSW board
POW-LR board
PS board
T2 board
T1 board
2
Ornament frame
3
Three screws
(4
×
20)
4
Front panel assy
!¢
T wo screws
(M4
×
16)
!º
Seven screws
(+BVTP 3
!™
!¡
T wo screws
(+BVTP 3
!£
Five screws
(+BVTP 3
×
8)
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
×
8)
×
8)
block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• % : indicates tolerance.
• ¢ : internal component.
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note:
The components identified
by mark ! or dotted line with
mark ! are critical for safety .
Replace only with part
number specified.
• U : B+ Line.
• V : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
W or less unless otherwise
4
Note:
Les composants identifiés par une
marque ! sont critiques pour la
sécurité.
Ne les remplacer que par une
piéce portant le numéro spécifié.
• Signal path.
F : AUDIO
• Abbreviation
CND : Canadian
SP : Singapore
MY : Malaysia
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
• Waveforms
2
IC501#∞ (X2)
5.0 MHz
5.6Vp-p
— 5 —
— 6 —
SAVA-29
3-2. SCHEMATIC DIAGRAM — DOLBY SECTION — • See page 30 for IC Block Diagrams.
— 7 —
— 8 —
3-3. PRINTED WIRING BOARDS — DOLBY SECTION — • See page 6 circuit boards location.
SAVA-29
C
D
A
B
12
DOLBY BOARD
3456789101112
J401
5.1/DVD IN
REAR
CENTER
1
WOOFER
24
RLRL
FRONT
E
F
G
H
2548
I
1716
11
J
16
1-670-184-
(11)
G H
(Page 24) (Page 24)
— 9 —
— 10 —
SAVA-29
3-4. SCHEMATIC DIAGRAM — DISPLAY SECTION — • See page 6 for Waveforms. • See page 29 for IC Pin Functions.
— 11 —
— 12 —
3-5. PRINTED WIRING BOARDS — DISPLAY SECTION — • See page 6 circuit boards location.
SAVA-29
C
D
A
B
E
12
DISPLAY BOARD
(FLUORESCENT INDICATOR TUBE)
E
E
E
34567891011121314
FL501
KEY BOARD
9
SURROUNDINPUT
ON(GREEN)/READY
1
A
KK
13
CENTER
MODE
S.WOOFER
MASTER VOL
F
G
H
16
(STANDBY)
1-670-186-
E
3
1
• Semiconductor
11
(11)
Location
Ref. No. Location
D501 G-2
D502 G-2
D503 F-3
D504 E-11
D505 E-11
D506 G-4
D507 G-3
IC501 C-3
IC502 G-4
IC503 C-12
D
(Page 24)
19
1-670-185-
11
(11)
— 13 —
Q501 F-3
Q504 B-1
Q505 C-1
Q506 E-1
— 14 —
SAVA-29
3-6. SCHEMATIC DIAGRAM — POWER SECTION —
— 15 —
— 16 —
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