SAVA-27 - Sony Audio Service Manual (repair manual)

Model
SAVA-27
Pages
20
Size
655.2 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
sava-27.pdf
Date

View Sony SAVA-27 Service Manual online

SAVA-27
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese  Model
SERVICE MANUAL
HOME THEATER ACTIVE SPEAKER SYSTEM
MICROFILM
SPECIFICATIONS
— Continued on next page —
(Rear)
(R-ch)
(L-ch)
— 2 —
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.
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 —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 — ···················· 17
3-6.
IC Pin Function ································································ 20
3-7.
IC Block Diagrams ··························································· 21
4.
EXPLODED VIEWS
4-1.
System (L) Assy ······························································· 23
4-2.
System (R) Assy ······························································· 24
4-3.
Amplifier Section ····························································· 25
4-4.
Rear Speaker Section ························································ 26
5.
ELECTRICAL PARTS LIST
··································· 27
    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
µ
F
1.5k
AC
voltmeter
(0.75V)
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
– 3 –
TEST MODE
MODE ALL FLUORESCENT INDICATOR TUBES
LIGHT
When the AC plug is inserted to the power outlet with pressing the
MASTER VOL +  button, the all fluorescent indicator tubes light.
KEY CHECK, LED LIGHTING MODE
1. Pull out the AC plug from the power outlet and turn the power
OFF.
2. Connect the lead wire to TP3 on the KEY board.
3. Insert the AC plug to the power outlet and set to STANDBY
mode.
4. Let the lead wire connected in step 1 contact to the ground.
5. All fluorescent indicator tubes light, 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 STANDBY mode.
Note:
1. The LED (D505)lights while pressing each button.
The LED lights in red when ever 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.
• Parts Location
[KEY BOARD] — Conductor side —
CN552
IC503
S506
R557
TP3
Button
POWER
MASTER VOL–
MASTER VOL +
INPUT
SURROUND
CTR MODE
S.WOOFER
Button Number
2
3
4
5
6
7
8
LED Color
Red
Green
Red
Green
Red
Green
Red
1
2
3
4
4
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
7
!∞
8
9
!•
@™
@∞
!™
6
THEATER
7
PRO LOGIC
8
STADIUM
9
GAME
INPUT1
INPUT2
!™
MUTING
MASTER VOL
SUPER WOOFER MODE (1, 2, OFF)
!∞
SUR OFF
HALL
POWER
!•
POWER
STANDBY indicator
ON/READY indicator
VOLUME
@™
S.WOOFER
Remote Sensor
g
SURROUND
@∞
INPUT
This section is extracted
from instruction manual.
– 4 –
SECTION 2
DISASSEMBLY
– 5 –
2-1.
REMOVAL AMPLIFIER BLOCK
1
 Grill frame assembly
2
 Ornament frame
3
 Three tapping screws
(4
×
20)
4
 Front frame assembly
5
 Four tapping screws
(4
×
20)
7
 Display panel assembly
 One connector
PS Board
!∞
 Back panel
8
 5th tapping screws (4
×
16)
9
 8th tapping screws
(4
×
16)
 Three tapping screws (4
×
16)
 6P connector
!™
 5th screws
(BVTP 3
×
8)
 Four screws
(BVTP 3
×
8)
 Two screws
(BVTP 3
×
8)
 Amplifier
SDN651
6
 Flat type wire
(27core)
SECTION 3
DIAGRAMS
3-1.
CIRCUIT BOARDS LOCATION
– 6 –
INPUT board
MAIN board
POWER board
POW-SW board
POW-SR board
POW-CN board
POW-L board
POW-R board
DOLBY board
PS board
T1 board
T2 board
KEY board
DISPLAY board
– 20 –
3-6.
IC PIN FUNCTION
• IC501 SYSTEM CONTROL (UPD78043FGF-012-3B9)
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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53 to 70
71
72 to 77
78 to 80
I/O
O
O
O
O
O
O
O
I
O
I
O
O
O
O
O
I
I
I
I
I
I
O
O
O
O
I
I
I
O
O
O
O
O
O
Description
FL gride signal output
Power supply (+4.7V)
Power relay output
Dolby IC enable output
Dolby IC data output
Dolby IC clock output
Front speaker mute output
Center speaker mute output
HCD connector input
Super woofer mute output
Reset signal input
Connected to ground
Connected to ground
Ground
Volume IC enable output
Volume IC data output 2
Volume IC clock output 2
Volume IC data output 1
Volume IC clock output 1
Line input level
AD input for key
AD input for key
Power supply (+4.7V)
Analog reference voltage input
STOP input
Not used
Ground
X'tal (5MHz)
X'tal (5MHz)
Rear speaker mute
Connected to ground
Super woofer boost
Power supply (+4.7V)
Extermal center speaker switch input
TV SIRCS enable switch input
Connected to ground
Connected to ground
SIRCS input
Connected to ground
Connected to ground
Connected to ground
Connected to ground
LED output
LED output
LED output
Power supply (+4.7V)
FL segment signal output
Power supply (–25V) for FL segment signal output
FL gride signal output
FL gride signal output
Pin Name
7G to 1G
VDD
POWER RY
PLO/DELAY-CE
PLO/DELAY-DATA
PLO/DELAY-CLK
FRONT MUT
CENTER MUT
HCD IN
S/W MUT
RESET
AVSS
VOL CE
VOL DI1
VOL CL1
VOL DI2
VOL CL2
AUTO SW
KEY 1
KEY 0
AVDD
AVREF
STOP
XT2
Vss
X1
X2
REAR MUT
REAR POWER
S/W BOOST
CENTER EXT-SW
TV/SW
INT SIRCS
IC
STANDBY LED
READY LED
OPRATE LED
VDD
S24 to S7
VLOAD
S6 to S1
10G to 8G
• Abbreviation
FL : Fluorescent indicator tube
– 21 –
3-7.
IC BLOCK DIAGRAMS
1
2
3
4
5
6
7
8
9
15
10
11
12
+
13
14
16
21
18
19
25
17
24
22
23
20
34
32
33
29
30
35
28
31
27
26
36
40
39
38
37
41
42
NOISE
FILTER
NOISE
CH
BALANCE
CONTROL
VR
CONTROL
LPF
V REF
VR
VR
NOISE
GENERATOR
VCA
VCA
VCA
VCA
VCA
VCA
VCA
VCA
LPF
LPF
RECT
RECT
RECT
RECT
P. S.
P. S.
CMODE
MUTE
DIVIDER
OSC
CONTROL
CTRIM
LOG
DIFF
LOG
DIFF
DUAL T
CONTROL
L-IN
R-IN
V
SS
CLK
DATA
V
CC
L-OUT
R-OUT
S-OUT
C-OUT
ENABLE
OSC1
CMODE-CAP.
C-TRIM DC CUT
R-BPF1
R-BPF2
R-BPF3
DC CUT
DC CUT
L-R RECT
L+R RECT
VCS-TH
VCS-1
VCS-2
BPF1
BPF2
VREF
S-CH DC OUT
C-CH DC OUT
L-CH DC OUT
R-CH DC OUT
VREF
L-BPF1
L-BPF2
L-BPF3
DC CUT
DC CUT
R RECT
L RECT
VLR-TH
VLR-1
VLR-2
IC301
LA2786
IC701
µ
PC1237HA
1
2
3
4
5
6
7
8
OVER LOAD DET
F/F
OFFSET DET
LATCH/
AUTORESET
V
CC
 ON
MUTE
AC OFF
DET
V
CC
1
5
6
+
+
20
19
18
17
16
15
14
13
21
22
23
24
2
3
4
7
8
9
10
12
11
+
DEC
IN-FILTER
(40kHz)
VDD
ADM-CONT
SRAM
ADM
OUT-FILTER
(7k/5k)
B-NR
DC-OUT
VOL/MUTE
S-TRIM
INV-PHASE
R+DELAY
L+DELAY
A
B
A
B
A
B
A
B
A
B
A
B
A
B
L–R
L+R
(–6dB)
A
B
A.GND
L-OUT
R-OUT
VREF
S-OUT
DELAY-OUT
S-IN
R-IN
L-IN
VCC
NR-DET
ENABLE
DATA
CLK
D.GND
DC-CUT
VDD
OSC
OSC
NR-IREF
DC-CUT
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
DECODER
LATCH
SHIFT
REGISTER
CONTROL
+

1
2
3 4
5
6 7 8
9 10
20
19
18
17
16
15
14
13
12
11
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
LSELO
L4
L3
L2
L1
VDD
R1
R2
R3
R4
RSELO
RVRIN
RCOM
RT1
RT2
RT3
RTOUT
RSIN
RS1
RS2
RS3
RSOUT
RFIN
RFOUT
RROUT
VSS
CL
DI
CE
VREF
LROUT
LFOUT
LFIN
LSOUT
LS3
LS2
LS1
LSIN
LTOUT
LT3
LT2
LT1
LCOM
LVRIN
IC351
LV1016
IC201
LC75373ED
– 22 –
SECTION 4
EXPLODED VIEWS
Note:
-XX, -X mean standardized parts, so they may
have some differences from the original one.
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
The mechanical parts with no reference number
in the exploded views are not supplied.
Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
Abbereviation
G
:German
SP :Singapore
AUS :Australian
CH :Chinese
MY :Malaysian
The components identified by mark 
!
or
dotted line with mark 
!
 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
!
 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
— 23 —
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
4-1.
SYSTEM (L)ASSY
1
4-991-883-01 FRAME, ORNAMENT
2
X-4948-622-1 FRAME (L) ASSY, GRILLE
3
4-951-733-01 CATCHER
4
1-505-681-11 SPEAKER (5cm)
5
X-4948-623-1 PANEL ASSY, FRONT
6
1-505-680-11 SPEAKER (10cm)
7
X-4948-550-1 PANEL ASSY, DISPLAY
8
4-991-271-01 BUTTON (A)
9
4-991-275-01 WINDOW (IR)
10
4-991-284-01 REFLECTOR
11
4-991-276-01 HOLDER, FL TUBE
* 12
A-4403-111-A DISPLAY BOARD, COMPLETE
13
4-991-272-01 BUTTON (B)
* 14
1-666-222-11 KEY BOARD
* 15
A-4384-736-A CABINET (L) ASSY, SPEAKER (EXCEPT G)
* 15
A-4384-738-A CABINET (L) ASSY, SPEAKER (G)
16
4-991-889-01 COVER (W)
17
1-505-679-11 SPEAKER (13cm)
18
4-923-040-11 SCREW (4X16), TAPPING
* 19
4-976-741-01 COVER, BUTTON
* 20
4-991-890-01 PANEL (L), BACK (US)
* 20
4-991-890-11 PANEL (L), BACK (Canadian)
* 20
4-991-890-21 PANEL (L), BACK (AEP, UK, G, MY, SP)
* 20
4-991-890-31 PANEL (L), BACK (AUS)
* 20
4-991-890-41 PANEL (L), BACK (CH)
21
4-914-430-11 SCREW (4X20), TAPPING
FL501
1-517-673-11 INDICATOR TUBE, FLUORESCENT
a
b
a
b
FL501
#2
#2
#1
#3
#3
#5
#5
#5
11
6
12
21
21
8
15
4
3
5
3
2
1
9
7
10
14
21
21
13
21
18
18
20
19
18
16
17
21
AMPLIFIER ASSY

Download Sony SAVA-27 Service Manual (Repair Manual)

Here you can view online and download Sony SAVA-27 Service Manual in PDF. SAVA-27 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SAVA-27 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.