Sony STR-DE235 Service Manual ▷ View online
SECTION 3
TEST MODE
Initialization Mode
All preset contents are cleared when this mode is activated. When
returning the unit to the customer after completing repairs, per-
form this operation to clear the unit.
returning the unit to the customer after completing repairs, per-
form this operation to clear the unit.
Procedure:
1. While pressing two buttons of
1. While pressing two buttons of
[TUNER]
and
[MD/TAPE]
si-
multaneously, press the
1/u
button to turn the power ON.
2. The message “INITIAL” appears and initialization is per-
formed.
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.
segments turn on at the same time, then each segment turns on one
after another.
Procedure:
1. While pressing two buttons of
1. While pressing two buttons of
[TV/LD]
and
[DIRECT]
simul-
taneously, press the
1/u
button to turn the power ON.
2. All segments turn on at the same time, then each segment and
LED turns on one after another.
3. The message “FINISH” appears when this test is complete.
AUTO-BETICAL Check Mode
To auto-scanning and memories of RDS station.
Procedure:
1. While pressing the
1. While pressing the
[MEMORY]
button, press the
1/u
button to turn the power ON.
2. The message “AUTO BET” appears and each function is se-
lected one after another.
Software Version Display Mode
The software version is displayed.
Procedure:
1. While pressing two the buttons of
1. While pressing two the buttons of
[MD/TAPE]
and
[DIRECT]
simultaneously, press the
1/u
button to turn the power ON.
2. The software version is displayed.
SOUND FIELD Setting Clear Mode
All SOUND FIELD setting are cleared.
Procedure:
1. While pressing the
1. While pressing the
[SOUND FIELD ON/OFF]
button, press
the
1/u
button to turn the power ON.
2. The message “SURR CLR” appears and all SOUND FIELD
setting are cleared.
– 5 –
– 6 –
REAR PAENL SECTION
MAIN BOARD
2
connectors
(CNP901)
(CNP901)
4
rear panel section
3
two screws
(BVTP3
(BVTP3
×
8)
3
seven screws
(BVTP3
(BVTP3
×
8)
3
four screws
(BVTP3
(BVTP3
×
8)
1
flat wire (CNS401)
2
connector
(CNS802)
(CNS802)
2
connector
(CNP702)
(CNP702)
2
connector
(CNP801)
(CNP801)
2
two connectors
(CNP703, 704)
(CNP703, 704)
4
PC board holder
3
three screws
(BVTP3
(BVTP3
×
8)
3
three screws
(BVTP3
(BVTP3
×
8)
5
MAIN board
1
three flat wires
(CNS204, 403, 701)
(CNS204, 403, 701)
STR-DE235
– 7 –
– 8 –
SECTION 4
DIAGRAMS
4-1.
BLOCK DIAGRAM – MAIN Section (1/2) –
FUNCTION
SWITCH
IC401
DOLBY SURROUND
PRO-LOGIC DECODER
IC300
DOLBY SURROUND
PASSIVE DECODER
IC301
VOLUME
MOTOR DRIVE
IC202
SYSTEM CONTROLLER
IC201 (1/2)
05
B
(Page 9)
C
(Page 9)
(Page 9)
A
(Page 9)
•
SIGNAL PATH
: TUNER (FM)
FM/AM TUNER PACK
COM
COM
L OUT
FM-ANT
FM-ANT
GND
GND
AM-ANT
AM-ANT
GND
GND
R OUT
VIDEO
TV/SAT
R-CH
R-CH
S.CLK
4
8
7
13
14
16
2
45
24
19
18
15
S.DATA
14
S.LAT
13
CLK 47
DATA 46
ENABLE
OSC1
45
48
CLK
2
DATA
3
ENABLE
4
26
25
X201
4.19MHz
CENTER
RCH
LCH
REAR
–1
–2
L-OUT
R-OUT
S-OUT
C-OUT
L-IN
R-IN
VIDEO
REC
TAPE
REC
REC COM
FUNC.MUTE
43
42
3
2
54
UP
8
DOWN
UP
DOWN
VOL UP
VOL DOWN
34
35
X1
X2
21
SP-RLY
22
SURR-RLY
16
SP-RLY
SURR-RLY
PROTECT
7
23
L-IN
11
R-IN
12
S-IN
13
LC-INB
39
LC-INE
40
CR-OT
41
CR-IN
42
LS-OUT
9
10
41
40
39
38
22
21
20
LEVEL
SHIFT
SHIFT
REGISTER
& LATCH
CPU
INTERFACE
J402 (1/2)
VIDEO
AUDIO IN
L
R
RV421
BASS
RV422
TREBLE
RV423
BALANCE
R-CH
TV/LD
AUDIO IN
L
R
R-CH
J401 (1/2)
MD/TAPE IN
L
R
LINE AMP
IC302 (1/2)
LINE AMP
IC404 (1/2)
LINE AMP
IC404 (2/2)
LINE AMP
IC302 (2/2)
MOTOR
DRIVE
MUTING
Q363
25
24
L-OUT
R-OUT
MUTING
Q361
MUTING
Q362
OSC
MUTING
Q365
ANTENNA
AM
FM 75
Ω
COAXIAL
R-CH
R-CH
CD IN
L
R
R-CH
R-CH
J402 (2/2)
J401 (2/2)
VIDEO
AUDIO
OUT
MD/TAPE
REC OUT
L
R
R-CH
L
R
R-CH
CD
R-CH
29
27
23
R-CH
R-CH
PHONO
R-CH
30
TUNER
R-CH
28
MD/TAPE
24
R-CH
S.DATA
S.CLK
S.LAT
DATA
CLK
EN1
DATA
CLK
EN1
PLL DATA
PLL DATA
TUNED
STEREO
SIGNAL
TUNER-MUTE
AUTO-STOP
13 S.CE (LV1018)
12 S.CE (LC7822)
9
S.CLK
10 S.DATA
11 PLL.DATA
STEREO-IN
SIGNAL
TUNER-MUTE
TUNER-MUTE
31
RDS DATA IN
46
RDS CLK IN
TUNED
STEREO
STEREO
SIGNAL
TUNER-MUTE
D
ATA
CLK
EN2
DATA
CLK
CLK
EN1
EN2
DO
TUNED
STEREO
SIGNAL
DET OUT
T.MUTE
RDS DECODER
IC1
57 kHz
BAND-PASS
FILTER
CLOCKED
COMPARATOR
CONTANS LOOP
VARIABLE &
FIXED DIVIDER
CLOCK
REGENERATION
& SYNC
OSCILLATOR
& CLOCK
DIFFERENTIAL
DECODER
BIPHASE SYMBOL
DECODER
X1
4.332MHz
MUX
CIN
RDDA
OSCI
OSCO
RDCL
SC
OUT
–1
–2
–1
–2
–4
–5
–6
RV404
MASTER VOLUME
–3
D
(Page 9)
E
M
PROTECT
STR-DE235
– 9 –
– 10 –
4-2.
BLOCK DIAGRAM – MAIN Section (2/2) –
POWER AMP
IC701 (1/2)
05
B
(Page 8)
•
SIGNAL PATH
: TUNER (FM)
LCH
SP-RLY,
SURR-RLY,
PROTECT
SURR-RLY,
PROTECT
SP-RL
Y
SURR-RL
Y
PROTECT
PRE
DRIVE
DRIVER
CENTER
REAR
TM601
TM701
L
R
BASS BOOST
FILTER AMP
Q452
BASS BOOST
SWITCH
Q401
FINAL
DRIVER
Q703, 704
OVER LOAD
DETECT
Q720
BIAS
Q701, 702
NF
J253
MIX
AUDIO OUT
(Page 8)
E
S701–3–1
PHONES
J741
+VOUT1
–VOUT1
IN1
NF1
–1
5
6
3
2
POWER AMP
IC702 (1/2)
C
(Page 8)
F
(Page 11)
RCH
BASS
BOOST
BOOST
PRE
DRIVE
DRIVER
BASS BOOST
FILTER AMP
Q402
BASS BOOST
SWITCH
Q451
FINAL
DRIVER
Q753, 754
OVER LOAD
DETECT
Q770
BIAS
Q751, 752
NF
+VOUT1
–VOUT1
IN1
NF1
5
6
3
2
POWER AMP
IC701 (2/2)
A
(Page 8)
REAR
PRE
DRIVE
DRIVER
FINAL
DRIVER
Q653, 654
OVER LOAD
DETECT
Q670
BIAS
Q651, 652
NF
+VOUT2
–VOUT2
IN2
NF2
9
8
11
12
POWER AMP
IC702 (2/2)
PRE
DRIVE
DRIVER
FINAL
DRIVER
Q603, 604
OVER LOAD
DETECT
Q620
BIAS
Q601, 602
NF
+VOUT2
–VOUT2
IN2
NF2
9
8
11
12
D
(Page 8)
CENTER
PROTECT
SWITCH
Q721 – 723
D721
SPEAKER PROTECT
RELAY DRIVE
Q610
RY601
–2
–2
SPEAKER PROTECT
RELAY DRIVE
Q710
RY701
–1
D725
D728
D723
D311, 312
D203
+
+
+
+
+
S701–4–2
SPEAKERS A
Ø ON ø OFF
ON
OFF
S701–3
SPEAKERS A
Ø ON ø OFF
S701–1–1
SPEAKERS B
Ø ON ø OFF
S701–2
SPEAKERS A
Ø ON ø OFF
ON
OFF
ON
OFF
S701–2–1
ON
OFF
S701–2–2
ON
OFF
OFF
ON
S701–1–2
SPEAKERS B
Ø ON ø OFF
OFF
ON
A
A
R
B
B
S701–3–2
+
–
+
–
+
–
+
–
+
–
+
–
+
–
L
SPEAKERS FRONT
IMPEDANCE
USE 4 – 16
Ω
SPEAKERS
IMPEDANCE
USE 4 – 16
Ω
STR-DE235
– 11 –
– 12 –
4-3.
BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –
05
B+ SWITCH
Q233
REMOTE CONTROL
RECEIVER
IC203
FLUORESCENT
INDICATOR
TUBE
FL201
POWER ON/OFF
RELAY DRIVE
Q802
BRIDGE
RELAY DRIVE
Q809
–24V
REGULATOR
Q801
RECT
D803
D803
RECT
D802
D802
F
(Page 9)
BASS BOOST
B+ SWITCH
Q237
LED DRIVE
Q242
RECT
D820 – 823
RECT
D810 – 813
+12V
REGULATOR
IC801
+5V
REGULATOR
IC803
RECT
D814, 815
VREF
AC
DET
LATCH
+5.6V
REGULATOR
Q951
RESET SWITCH
Q201, 202
–12V
REGULATOR
IC802
+10V
REGULATOR
IC805
+5V
REGULATOR
IC804
+5V
F1
F2
Q234 – 236
LED DRIVE
Q236
Q235
Q234
D236
D241
D421
Q239
LED3
LED SELECT
S201 – 220, 222 – 227,
S229 – 231, 234 – 244
BRIDGE-RLY
D201, 202
OUTC
VSC
RESET
V+
VSB
+12V
–12V
RELAY B+
+10V
DOLBY SURROUND PRO-LOGIC
CIRCUIT (IC300, 301) B+
+5V
DISPLAY SECTION B+
+5V
FM/AM TUNER PACK,
RDS DECODER (IC1) B+
FUNCTION SWITCH (IC401),
AUDIO LINE AMP CIRCUIT
POWER AMP
CIRCUIT
–24V
FL DRIVER (IC201) B–
+5V
SYSTEM CONTROLLER
(IC201) B+
RESET SIGNAL GENERATOR,
+5.6V REGULATOR
IC950
B+
B–
–1
–2
TO FL201
F1
F2
T902
POWER
TRANSFORMER
T901
POWER
TRANSFORMER
AC OUTLET
SWITCHED
100W MAX
100W MAX
CNJ903
AEP
RY901
A/D-1 – A/D-4
61
LED2
60
LED1
59
BASS BOOST
53
37
49
44
15
POWER-RLY 23
STOP 47
RESET 17
2
VSA
7
3
8
5
6
RY801
AC IN
SYSTEM CONTROLLER, FL DRIVER
IC201 (2/2)
SYS-POWER
SIRCS
S200
(POWER)
I/
u
D237
REAR
D233
CENTER
D228
BASS BOOST
D236
EFFECT/
DELAY
D234
SET UP
D235
NAME
28 – 25
DIG1 – DIG10
7 – 1, 80 – 78
S1 – S15
77 – 72, 70 – 62
MUTING LED
50
LED DRIVE
Q241
D240
MUTING
C.STUDIO LED
39
LED DRIVE
Q231
D231
CINEMA
HALL LED
40
LED DRIVE
Q232
D232
MUSIC
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