Sony STR-SE381 Service Manual ▷ View online
STR-SE381
— 5 —
— 6 —
SECTION 2
TEST MODE
INITIALIZATION MODE
*
All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon
completion of repair.
this mode before returning the product to clients upon
completion of repair.
*
Procedure:
While depressing the VIDEO, TAPE/MD and the CD buttons
simultaneously, press the power [I/
While depressing the VIDEO, TAPE/MD and the CD buttons
simultaneously, press the power [I/
u] button to turn on the main
power. The message INITIAL appears and initialization is
performed.
performed.
FLUORESCENT INDICATOR TUBE TEST MODE
*
All fluorescent segments are tested. When this test is activated,
all segments turn on at the same time, then each segment turns
on one after another.
all segments turn on at the same time, then each segment turns
on one after another.
*
Procedure:
While depressing the CD and the TAPE/MD buttons
simultaneously, press the power [I/
While depressing the CD and the TAPE/MD buttons
simultaneously, press the power [I/
u] button to turn on the main
power. All segments turn on at the same time, then each segment
turns on one after another. The message FINISH appears when
this test is complete.
turns on one after another. The message FINISH appears when
this test is complete.
AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE
SELECTION MODE
*
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
channel step.
*
Procedure:
Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING+ button, press the power [I/
Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING+ button, press the power [I/
u]
button to turn on the main power. Either the message 9k STEP
or 10k STEP appears. Select the desired step.
or 10k STEP appears. Select the desired step.
REAR SPEAKER GAIN UP MODE
*
The rear speaker gain can be set to either NORMAL or GAIN
UP.
UP.
*
Procedure:
While depressing the -SURROUND button, press the power [I/
u] button to turn on the main power. Either the message
NORMAL or GAIN UP appears. When the product enters this
mode again, the other gain appears. Select the desired gain.
While depressing the -SURROUND button, press the power [I/
u] button to turn on the main power. Either the message
NORMAL or GAIN UP appears. When the product enters this
mode again, the other gain appears. Select the desired gain.
SECTION 3
DIAGRAMS
3-1.
CIRCUIT BOARDS LOCATION
• Waveforms
For schematic diagrams.
Note:
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For printed wiring boards.
Note:
Note:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
Note:
The components identified by
mark
The components identified by
mark
!
or dotted line with mark
!
are critical for safety.
Replace only with part number
specified.
specified.
SECONDARY
board
STANDBY
board
MAIN
board
VOLUME
board
VR-TONE
board
KEY
board
SW (B)
board
SW (A)
board
DISPLAY
board
SW
board
PRIMARY
board
STR-SE381
— 7 —
— 8 —
3-2.
PRINTED WIRING BOARD — DISPLAY SECTION —
1
2
A
B
C
D
E
F
3
4
5
6
7
8
9
10
11
12
1
2
A
B
C
D
E
F
3
4
5
6
7
8
9
10
11
12
Ref. No.
Location
D201
B-2
D202
B-2
D203
B-3
D204
A-11
D211
B-8
D213
B-8
D214
B-8
D224
B-7
D231
B-1
D235
B-7
D236
B-8
D237
B-9
IC201
B-5
IC202
B-2
IC203
C-9
Q201
A-10
Q202
A-10
Q231
B-1
• Semiconductor
Location
DISPLAY BOARD
KEY BOARD
A
TO
VOLUME BOARD
CNP202
(Page 11)
H
TO
MAIN BOARD
CNS204
(Page 15)
MAIN BOARD
CNS204
(Page 15)
16
4
1
4
1
DIRECT
VIDEO
PHONO
SHIFT
2
1
3
4
6
7
8
9
0
5
1-665-268-
11
(12)
EFFECT
DELAY TIME
SET UP
MODE
SURROUND
ON/OFF
1
1
9
7
E
1 80
24
25
65
64
40 41
IC201
1
2
5
14
17
31
34
35
HALL
C.STUDIO
PRO LOGIC
REMOTE
SENSOR
SENSOR
REAR
LEVEL
CENTER
LEVEL
POWER
E
E
1-665-267-
11
(12)
PRESET
TUNING
MEMORY
FM MODE
TUNING
AM
FM
CD
TV/DBS
TUNER
TAPE/MD
STR-SE381
— 9 —
— 10 —
3-3.
SCHEMATIC DIAGRAM — DISPLAY SECTION —
• See page 6 for Waveforms. • See page 25 for IC Pin Functions. • See page 27 for IC Block Diagrams.
STR-SE381
— 11 —
— 12 —
3-4.
PRINTED WIRING BOARD — VOLUME SECTION —
1-665-276-
11
(12)
1-665-277-
11
1
1
3
5
(12)
1-665-278-
11
(12)
1-665-269-
11
(12)
1-665-270-
11
(12)
SW BOARD
SW (A) BOARD
SW (B) BOARD
J741
PHONES
D
E
TO
MAIN BOARD
CNP702
(Page 16)
TO
MAIN BOARD
CN706
(Page 16)
S701
SPEAKERS
S701-1
A
S701-2
B
VR-TONE BOARD
VOLUME BOARD
M
MASTER VOLUME
F
TO
MAIN BOARD
CNS301
(Page 15)
(Page 15)
TO
MAIN BOARD
CNS701
(Page 15)
(Page 15)
A
G
TO
DISPLAY
BOARD
CNS202
(Page 7)
(Page 7)
1
4
5
8
E
E
RV404
BASS
BASS
BOOST
TREBLE
BALANCE
1
7
16
1
2
A
B
C
D
E
F
G
3
4
5
6
7
8
9
10
11
12
1
2
A
B
C
D
E
F
G
3
4
5
6
7
8
9
10
11
12
Ref. No.
Location
D238
C-2
D421
F-1
IC404
F-3
Q401
E-3
Q402
F-2
Q451
F-3
Q452
E-2
• Semiconductor
Location
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