Sony STR-DE375 Service Manual ▷ View online
6
STR-DE375
SECTION 2
TEST MODE
FACTORY SET MODE
* All preset contents are reset to the default setting.
* Procedure:
* Procedure:
While depressing the VIDEO and the CD buttons simultaneously,
press the power ?/1 button to turn on the main power. The
message “FACTORY” appears and the present contents are reset
to the default values.
press the power ?/1 button to turn on the main power. The
message “FACTORY” appears and the present contents are reset
to the default values.
ALL CLEAR MODE
* All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
of repair.
* Procedure:
While depressing the TUNER and the MD/TAPE buttons
simultaneously, press the power ?/1 button to turn on the main
power. The message “INITIAL” appears and initialization is
performed.
simultaneously, press the power ?/1 button to turn on the main
power. The message “INITIAL” appears and initialization is
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.
one after another.
* Procedure:
While depressing the TV/SAT and the CD buttons simultaneously,
press the power ?/1 button to turn on the main power.
press the power ?/1 button to turn on the main power.
1. All segments turn on.
SET UP, SOUND FIELD LED turn on.
2. Press the VIDEO button, confirm display
SET UP, NAME LED turn on.
3. Press the VIDEO button, confirm display
SOUND CONTROL LEVEL, SOUND CONTROL SUR and
SOUND FIELD LED turn on.
SOUND FIELD LED turn on.
4. Press the VIDEO button, All segments turn off.
5. Every pressing of the VIDEO button turns on each segment
one after another in the following order.
(Not only the VIDEO button, but also the other buttons such as
TV/SAT , MD/TAPE , CD , TUNER can be used.)
(Not only the VIDEO button, but also the other buttons such as
TV/SAT , MD/TAPE , CD , TUNER can be used.)
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.
* Procedure:
Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING+ button or the PRESET+ button,
press the power ?/1 button to turn on the main power. Either
the message “AM 9 k STEP” or “AM 10 k STEP” appears. Select
the desired step.
While depressing the TUNING+ button or the PRESET+ button,
press the power ?/1 button to turn on the main power. Either
the message “AM 9 k STEP” or “AM 10 k STEP” appears. Select
the desired step.
* For Canadian/E model only
SOFTWARE VERSION DISPLAY MODE
* The software version is displayed.
* Procedure:
* Procedure:
While depressing the TUNER and the VIDEO buttons
simultaneously, press the power ?/1 button to turn on the main
power. The model name, destination and the software version are
displayed.
simultaneously, press the power ?/1 button to turn on the main
power. The model name, destination and the software version are
displayed.
AUTOBETICAL MODE (AEP Model only)
* This mode is installed in the Europe models only. When this mode
is used, the receiver scans the broadcasts that can be received by
tuner, and sets up the broadcasts. Be sure to start scanning after
connecting the antenna.
tuner, and sets up the broadcasts. Be sure to start scanning after
connecting the antenna.
* Procedure:
Check that the antenna is connected. Press the power ?/1 button
while pressing the MEMORY button to turn on the power. The
message “Autobetical select” appears and scanning starts by tuner.
while pressing the MEMORY button to turn on the power. The
message “Autobetical select” appears and scanning starts by tuner.
SURROUND CLEAR MODE
* The preset sound field is cleared when this mode is activated.
Use this mode before returning the product to clients upon
completion of repair.
completion of repair.
* Procedure:
While depressing the SOUND FIELD ON/OFF button, press
the power ?/1 button to turn on the main power. The message
“SURR CLR” appears and initialization is performed.
the power ?/1 button to turn on the main power. The message
“SURR CLR” appears and initialization is performed.
KEY CHECK MODE
* Button check
* Procedure:
* Procedure:
While depressing the MD/TAPE and the CD buttons
simultaneously, press the power ?/1 button to turn on the main
power.
“RES 36 KEY” appears.
Every pressing of any button other than ?/1 counts down the
buttons. The buttons which are already counted once are not
counted again. When all buttons are pressed “RES 00 KEY”
appears.
When MASTER VOLUME is rotated in clockwise direction,
“VOL MIN”, “VOL 1” to “VOL 30”, “VOL MAX” appear.
simultaneously, press the power ?/1 button to turn on the main
power.
“RES 36 KEY” appears.
Every pressing of any button other than ?/1 counts down the
buttons. The buttons which are already counted once are not
counted again. When all buttons are pressed “RES 00 KEY”
appears.
When MASTER VOLUME is rotated in clockwise direction,
“VOL MIN”, “VOL 1” to “VOL 30”, “VOL MAX” appear.
7
STR-DE375
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
• WAVEFORMS
– MAIN BOARD –
– MAIN BOARD –
SECONDARY board
PRIMARY board
(except E model)
(except E model)
VOL-SEL board (E model)
MAIN board
DISPLAY board
HEADPHONE board
POWER SWITCH board
STANDBY board
1
IC1
qf
2.2Vp-p
230ns
2
IC103
qa
5.0Vp-p
200ns
– DISPLAY BOARD –
8
STR-DE375
For schematic diagrams.
Note:
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
f
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: 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.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
• Abbreviation
CND : Canadian model
MY
MY
: Malaysia model
SP
: Singapore model
AR
: Argentina model
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.)
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.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
Ne les remplacer que par une
pièce portant le numéro spécifié.
For printed wiring boards.
Note:
Note:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
9
9
STR-DE375
3-2. BLOCK DIAGRAM
TUNER UNIT
RESET
Q201,202
Q659
• Signal Path
• RCH is omitted due to same as LCH.
: FM
: CD
FM
AM
R-CH
S DATA
PLL DATA
S CLK
S CE
SIGNAL
STEREO
AUTO STOP
T MUTE
S DATA
DATA OUT
S CLK
SLAT
SIGNAL
STEREO
TUNED
T MUTE
FM
AM DET OUT
R OUT
L OUT
CD IN
MD/TAPE OUT
MD/TAPE IN
VIDEO/AUDIO OUT
VIDEO/AUDIO IN
DVD/
MULTI CH
FRONT
SURROUND
CENTER
WOOFER
SUB
J501
J401,402
RT IN
61
FC R IN
34
FC SR IN
32
FC C IN
62
DATA
52
DOLBY
SURROUND PROCESSOR
IC202
16
L OUT
CLK
53
ENABLE
51
2
18
SR OUT
10
C OUT
DATA
CLK
4
14
16
13
X1
4.33MHz
RDS
IC1
AEP,UK MODELS
AUDIO SELECT
IC201
IN F2
66
IN A2
71
REC OUT 2A
61
IN B2
70
IN G2
63
SW CH N IN
27
D OUT2
59
49
L CH OUT
REC OUT 2B
61
43
SL CH OUT
37
C CH OUT
28
SW CH OUT
MUTE
Q361
SEL OUT2
60
T IN2
58
SL CH N IN
44
DATA
32
CLOCK
31
LATCH
33
SL CH D IN
45
C CH N IN
38
C CH D IN
39
DATA
CLOCK
S CE
MUTE
Q362
MUTE
Q363
MUTE
Q364
IN1
6
2
+V OUT1
POWER AMP
IC701
5
NF1
LIMITER
Q701
3
-V OUT1
LIMITER
Q702
BOOSTER
Q703
BOOSTER
Q704
CURRENT
DETECT
Q705,706
OVER LOAD
DETECT
Q708,709
IN2
8
12
+V OUT2
9
NF2
LIMITER
Q651
11
-V OUT1
LIMITER
Q652
BOOSTER
Q653
BOOSTER
Q654
CURRENT
DETECT
Q655,656
IN+
1
6
+V OUT
POWER AMP
IC501
2
IN-
LIMITER
Q501
5
-V OUT
LIMITER
Q502
BOOSTER
Q503
BOOSTER
Q504
CURRENT
DETECT
Q505,506
OVER LOAD
DETECT
Q507,509
OVER LOAD
DETECT
Q657,658
Q707
D706
D606
D506
D721
PROTECT
SWITCH
Q722,723,725
RELAY
DRIVE
Q791
RY791
RELAY
DRIVE
Q730
RY710
D731
RELAY
DRIVE
Q610
RY610
D735
RELAY
DRIVE
Q550
RY510
D734
IC401
3
1
RELAY
DRIVE
Q470
RY470
D736
L
R
SR
SL
C
R-CH
R-CH
SPEAKERS
FRONT
SPEAKERS
SURROUND
SPEAKERS
CENTER
TM601
TM602
SUB WOOFER
AUDIO OUT
J403
21
AUTO STOP
22
T MUTE
23
STEREO IN
28
SIGNAL
24
PLL DATA
19
S DATA
18
S CLK
20
S CE
38
RDS CLK IN
15
RDS DATA
8
S CLK
9
S CE
17
S CE
7
S DATA
59
FUNC MUTE
47
PROTECT
AUTO STOP
T MUTE
STEREO
SIGNAL
PLL DATA
S DATA
S CLK
S CE
CLOCK
S CE
DATA
54
H/P RY
61
HP SW
53
FRONT RY
51
REAR RY
52
CTR RY
55
WOOFER RY
100 91
33 30
A/D1
A/D4
FUNCTION
KEY
S202-229,231-236
S FIELD LED
68
SURR LED
66
LEVEL LED
65
NAME LED
64
SETUP LED
63
LED DRIVE
Q210-213,215
D210-213,D215
SYSTEM CONTROL
IC103
RV201
ENCODER
3
1
ENCODER
50
ENCODER
49
SYS POWER
56
MASTER
VOLUME
VOLUME
?/1
SYSTEM
POWER
S200
90 80
78 75
.
DIG1-10
S1-S15
FLUORESCENT
INDICATOR TUBE
F1
F2
FL201
10
RESET
39
STOP
26
SIRCS
REMOTE
CONTROL
RECEIVER
2
1
IC203
POWER
CONTROL
IC950
5
8
3
6
+5.6V REG
Q951
D201
D202
D910-913
AC
IN
IN
T902
RY901
D915
D914
RELAY
DRIVE
Q901
CNP901
D820-823
46
VDD
34
VDD
16
VDD
1
VDD
-7V
REG
3
2
+7V
REG
3
1
+5V
REG
3
1
+5V
REG
3
1
+9V
REG
3
1
DOLBY SURR
+9V
DISPLAY
+5V(A)
AUDIO
+7V
AUDIO
-7V
TUNER,RDS
AUDIO
+5V(B)
IC805
IC803
IC804
IC807
IC802
POWER RY
48
RELAY
+B
+12V
REG
3
1
POWER AMP
+12V
IC801
-24V REG
Q801
FL201
-24V
-B SW
Q715
POWER AMP
-B
D824
D802
T901
POWER AMP
+B
240V
220V
120V
0V
VOLTAGE
SELECTOR
E MODEL
S901
12
11
X1
X2
X201
5.00MHz
F1
F2
R-CH
PHONES
J200
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