Sony STR-SE381 Service Manual ▷ View online
— 27 —
3-12. IC BLOCK DIAGRAMS
IC300
LV1016
IC301
LA2786
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
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
— 28 —
IC401
LC7822
IC701
µPC2581
IC202
BA6208
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CONTROL
LATCH
SHIFT RESISTOR
LEVEL SHIFT
CL
DI
CE
VEE
OUT
IN
OUT
IN
OUT
IN
VSS
S
RESET
VDD
OUT
IN
IN
OUT
IN
OUT
IN
2
3
5
4
6
7
9
8
1
MUTE
+ VOUT1
– VOUT1
COMP1
MF1
IN1
GND
IN2
NF2
COMP2
– VOUT2
+ VOUT2
VCC1
VCC2
VEE
PROTECTOR
BIAS CIRCUIT
REG
DRIVE
PRE
DRIVE
11
10
12
13
15
14
DRIVE
PRE
DRIVE
1
2
3
4
5
6
7
8
9
NC
OUTPUT 2
Vcc
GND
NC
INPUT 2
INPUT 1
NC
MOTOR
DRIVE
MOTOR
DRIVE
REG
SWITCH
SWITCH
OUTPUT1
SECTION 4
EXPLODED VIEWS
Note:
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
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.
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.
in the exploded views are not supplied.
•
Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
packing materials are given in the last of this
parts list.
The components identified by mark
!
or
dotted line with mark
!
are critical for safety.
Replace only with part number specified.
— 29 —
4-1.
FRONT PANEL SECTION
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
SONY
a
a
8
7
8
6
5
5
16
18
2
1
14
11
12
13
13
9
10
8
18
FL201
#1
#1
#1
13
#1
3
17
VOLUME board
(Including in 14)
(Including in 14)
1
4-980-639-01 KNOB (R14)
2
X-4946-873-1 KNOB (R48) ASSY
3
X-4949-646-1 FRONT PANEL ASSY
* 5
4-921-941-01 CUSHION (FL)
* 6
4-943-107-11 HOLDER (FL TUBE)
* 7
4-980-658-01 CASE (413226)
8
3-710-901-11 SCREW, TAPPING
* 9
A-4407-427-A DISPLAY BOARD, COMPLETE
10
1-782-100-11 WIRE (FLAT TYPE) (23 CORE)
11
1-782-075-11 WIRE (FLAT TYPE) (9 CORE)
12
1-782-074-11 WIRE (FLAT TYPE) (7 CORE)
13
4-951-620-01 SCREW (2.6
×
8), +BVTP
* 14
A-4407-429-A VR-TONE BOARD, COMPLETE
16
3-008-600-11 EMBLEM (5-AR), SONY
* 17
A-4407-430-A KEY BOARD, COMPLETE
18
4-977-358-11 CUSHION
FL201
1-517-141-11 INDICATOR TUBE, FLUORESCENT
— 30 —
4-2.
CHASSIS SECTION
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
58
71
59
CNJ903
57
64
65
63
54
55
T901
52
51
62
SW(B) board
(Including in 51)
(Including in 51)
#1
#1
#1
#1
#1
#1
#1
#3
#1
#1
#1
#1
#1
#1
#1
#1
#1
#1
#2
#2
56
not supplied
not supplied
SW(A) board
(Including in 51)
(Including in 51)
not supplied
#1
#1
#1
#1
Transistor
70
* 51
A-4407-460-A SW BOARD, COMPLETE
52
4-951-801-01 BUTTON (S)
* 54
1-665-273-11 PRIMARY BOARD
* 55
1-665-274-11 SECONDARY BOARD
* 56
1-665-272-11 STANDBY BOARD
* 57
A-4407-426-A MAIN BOARD, COMPLETE
* 58
3-703-244-00 BUSHING (2104), CORD
* 59
4-997-684-01 BACK PANEL
62
X-4947-208-1 FOOT ASSY (F50150S)
63
4-924-098-01 HOLDER, PC BOARD
64
4-812-134-00 RIVET (DIA. 3.5), NYLON
* 65
4-954-051-51 HOLDER, PC BOARD
70
3-905-609-01 SCREW (TRANSISTOR)
! 71
1-777-070-21 CORD, POWER
! CNJ903 1-251-698-11 OUTLET (AC) (2P)
! T901
! T901
1-431-258-21 TRANSFORMER, POWER
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
Click on the first or last page to see other STR-SE381 service manuals if exist.