SONY STR-DE235 User Manual
STR-DE235
SERVICE MANUAL
SPECIFICATIONS
AEP Model
UK Model
MICROFILM
– Continued on next page –
FM STEREO/FM-AM RECEIVER
TABLE OF CONTENTS
1. GENERAL ................................................................... 3
2. DISASSEMBLY ......................................................... 4
3. TEST MODE.............................................................. 6
4. DIAGRAMS
4-1. Block Diagram – MAIN Section (1/2) –....................... 7
4-2. Block Diagram – MAIN Section (2/2) –....................... 9
4-3. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 11
4-4. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 13
4-5. Printed Wiring Board – MAIN Board – ........................ 15
4-6. Printed Wiring Boards
– SP SW Board/SECONDARY Board/
STANDBY Board/PRIMARY Board – .......................... 17
4-7. Schematic Diagram – Main Board (1/4) – .................... 19
4-8. Schematic Diagram
– Main Board (2/4)/SP SW Board – ............................... 21
4-9. Schematic Diagram – Main Board (3/4) – .................... 23
4-10. Schematic Diagram – Main Board (4/4)/
SECONDARY Board/STANDBY Board/
PRIMARY Board – ......................................................... 25
4-11. Printed Wiring Boards – PANEL Section – .................. 27
4-12. Schematic Diagram – PANEL Section –....................... 29
4-13. Printed Wiring Boards
– VOLUME Board/TONE Board – ................................ 31
4-14. Schematic Diagram
– VOLUME Board/TONE Board – ................................ 32
4-15. IC Pin Function Description ........................................... 36
5. EXPLODED VIEWS ................................................ 38
6. ELECTRICAL PARTS LIST ............................... 41
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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
Location of controls
• Front view
SECTION 1
GENERAL
267 !¢89 0 !¡ !™ !∞ !§
1
!¶
!•
1 I/u button
2 TUNING +, – buttons
3 DISPLAY button
4 PRESET/PTY SELECT +, – buttons
5 RDS PTYbutton
6 RDS EON button
7 FM/AM button
8 VIDEO button
9 TV/LD button
0 MD/TAPE button
!¡ SOUND FIELD + MODE, ON/OFF,
– MODE buttons
!™ SET UP button and indicator
345
!ª @º @¡ @™
@£ @¢ @∞ @§@¶@• @ª#º #™#£ #¢#¡
!¢ CINEMA indicator
!∞ MUSIC indicator
!§ BASS BOOST button and indicator
!¶ SPEAKERS A, B ON/OFF buttons
!• PHONES jack
!ª SHIFT button
@º Numeric buttons
@¡ DIRECT button
@™ MEMORY button
@£ FM MODE button
@¢ CD button
@∞ TUNER button
@§ EFFECT/DELAY button and indicator
#∞
#§
#¶
@¶ CENTER button and indicator
@• – button
@ª + button
#º REAR button and indicator
#¡ ENTER button
#™ NAME button and indicator
#£ VOLUME control
#¢ MUTING button and indicator
#∞ TREBLE control
#§ BASS control
#¶ BALANCE control
• Rear view
1 2345 6 7
8
90!¡
– 3 –
SECTION 2
)
)
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CASE
1
two screws
(case3 TP2)
1
screw (case3 TP2)
2
case
1
two screws
(case3 TP2
FRONT PANEL SECTION
2
three connectors
(CNP702 – 704)
4
claw
3
screw
(BVTP3
5
front panel section
×
8)
1
three flat wires
(CNS204, 403, 701
4
claw
3
– 4 –
four screws
(BVTP3
×
8)
SECTION 3
)
TEST MODE
REAR PAENL SECTION
2
connectors
(CNP901)
4
rear panel section
3
two screws
(BVTP3
Initialization Mode
All preset contents are cleared when this mode is activated. When
returning the unit to the customer after completing repairs, perform this operation to clear the unit.
Procedure:
×
8)
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 performed.
3
seven screws
(BVTP3
×
8)
Fluorescent Indicator Tube Test Mode
All fluorescent segments are tested. When this test is acti vated , all
segments turn on at the same time, then each segment turns on one
after another.
3
four screws
(BVTP3
×
8)
Procedure:
1. While pressing two buttons of [TV/LD] and [DIRECT] simultaneously, 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.
1
flat wire (CNS401)
AUTO-BETICAL Check Mode
To auto-scanning and memories of RDS station.
Procedure:
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 selected one after another.
MAIN BOARD
2
connector
(CNS802)
2
two connectors
(CNP703, 704)
2
connector
(CNP702)
3
three screws
(BVTP3
Software Version Display Mode
The software version is displayed.
Procedure:
1. While pressing two the buttons of
[MD/TAPE] and [DIRECT]
simultaneously, press the 1/u button to turn the power ON.
×
8)
2. The software version is displayed.
SOUND FIELD Setting Clear Mode
3
three screws
(BVTP3
×
8)
All SOUND FIELD setting are cleared.
Procedure:
1. While pressing the [SOUNDFIELDON/OFF] button, press
5
MAIN board
the 1/u button to turn the power ON.
2. The message “SURR CLR” appears and all SOUND FIELD
setting are cleared.
1
three flat wires
(CNS204, 403, 701
4
PC board holder
2
connector
(CNP801)
– 5 – – 6 –
STR-DE235
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM – MAIN Section (1/2) –
J402 (1/2)
VIDEO
26
R-CH
TV/SAT
25
R-CH
MD/TAPE
24
R-CH
CD
29
R-CH
PHONO
30
R-CH
TUNER
28
R-CH
R-CH
DATA
CLK
EN1
PLL DATA
TUNED
STEREO
SIGNAL
TUNER-MUTE
FM 75Ω
COAXIAL
AM
ANTENNA
VIDEO
AUDIO IN
TV/LD
AUDIO IN
MD/TAPE IN
CD IN
05
L
R
L
R
J401 (1/2)
L
R
L
R
FM/AM TUNER PACK
FM-ANT
FM-ANT
GND
AM-ANT
AM-ANT
GND
S.DATA
TUNED
STEREO
SIGNAL
T.MUTE
DET OUT
R-CH
R-CH
R-CH
R-CH
L OUT
R OUT
S.CLK
S.LAT
DO
COM
FUNCTION
SWITCH
IC401
COM
4
MUX
23
27
LEVEL
SHIFT
57 kHz
BAND-PASS
FILTER
RDS DECODER
IC1
20
SHIFT
REGISTER
& LATCH
SC
OUT
8 7
REC COM
CPU
INTERFACE
CIN
COMPARATOR
CLOCKED
VIDEO
REC
R-CH
TAPE
REC
R-CH
S.DATA
S.CLK
S.LAT
21
R-CH
22
R-CH
14
15
13
CONTANS LOOP
VARIABLE &
FIXED DIVIDER
OSCILLATOR
& CLOCK
OSCI
13
DATA
CLK
EN1
OSCO
14
4.332MHz
J402 (2/2)
J401 (2/2)
X1
R-CH
L
VIDEO
AUDIO
OUT
R
L
MD/TAPE
REC OUT
R
BIPHASE SYMBOL
DECODER
CLOCK
REGENERATION
& SYNC
DOLBY SURROUND
PRO-LOGIC DECODER
IC300
L-IN
9
R-IN
10
ENABLE
OSC1
48
DIFFERENTIAL
DECODER
L-OUT
R-OUT
S-OUT
C-OUT
DATA
CLK
RDDA
RDCL
DOLBY SURROUND
PASSIVE DECODER
IC301
–1
–2
VOLUME
MOTOR DRIVE
IC202
MOTOR
DRIVE
SP-RLY
PROTECT
LINE AMP
IC302 (1/2)
LINE AMP
IC404 (1/2)
LINE AMP
IC404 (2/2)
LINE AMP
IC302 (2/2)
LS-OUT
23
MUTING
Q363
LC-INB
39
LC-INE
CLK
EN2
40
41
CR-OT
CR-IN
42
L-IN
11
R-IN
12
S-IN
13
DATA
3
CLK
2
ENABLE
4
DATA
CLK
EN1
EN2
PLL DATA
TUNED
STEREO
SIGNAL
TUNER-MUTE
25
L-OUT
MUTING
24
R-OUT
MUTING
MUTING
SYSTEM CONTROLLER
IC201 (1/2)
10
S.DATA
9
S.CLK
12
S.CE (LC7822)
13
S.CE (LV1018)
11
PLL.DATA
AUTO-STOP
18
19
STEREO-IN
SIGNAL
24
TUNER-MUTE
45
31
RDS DATA IN
46
RDS CLK IN
Q361
Q362
Q365
OSC
41
40
39
38
46
47
45
DATA
2
16
RV421
BASS
54
FUNC.MUTE
VOL UP
VOL DOWN
SP-RLY
SURR-RLY
PROTECT
–1
–2
X1
X2
RV422
TREBLE
–1
–2
43423
34
35
21
22
16
RV423
BALANCE
UP
DOWN
2
X201
4.19MHz
SURR-RLY
MASTER VOLUME
UP
DOWN
8
7
RV404
–4
–5
–6
–3
M
REAR
LCH
RCH
CENTER
A
(Page 9)
B
(Page 9)
C
(Page 9)
D
(Page 9)
E
(Page 9)
• SIGNAL PATH
: TUNER (FM)
– 7 – – 8 –
4-2. BLOCK DIAGRAM – MAIN Section (2/2) –
POWER AMP
IC701 (1/2)
B
(Page 8)
C
(Page 8)
F
(Page 11)
LCH
RCH
BASS
BOOST
BASS BOOST
FILTER AMP
Q452
BASS BOOST
FILTER AMP
Q402
BASS BOOST
SWITCH
Q401
BASS BOOST
SWITCH
Q451
IN1
6
NF1
5
POWER AMP
IC702 (1/2)
IN1
6
NF1
5
POWER AMP
IC701 (2/2)
PRE
DRIVE
PRE
DRIVE
DRIVER
NF
DRIVER
NF
+VOUT1
–VOUT1
+VOUT1
–VOUT1
STR-DE235
J741
PHONES
S701–3
SPEAKERS A
Ø ON ø OFF
ON
OFF
S701–3–1
ON
OFF
S701–3–2
TM701
+
–
+
–
+
–
+
–
A
B
A
B
L
SPEAKERS FRONT
IMPEDANCE
USE 4 – 16Ω
R
ONOFF
ONOFF
S701–2
SPEAKERS A
Ø ON ø OFF
+
S701–2–1
2
3
2
3
BIAS
Q701, 702
BIAS
Q751, 752
FINAL
DRIVER
Q703, 704
FINAL
DRIVER
Q753, 754
OVER LOAD
DETECT
Q720
OVER LOAD
DETECT
Q770
+
–1
–2
RY701
SPEAKER PROTECT
RELAY DRIVE
Q710
S701–1–1
SPEAKERS B
Ø ON ø OFF
OFF
ON
S701–1–2
SPEAKERS B
Ø ON ø OFF
OFF
ON
S701–2–2
A
(Page 8)
D
(Page 8)
REAR
CENTER
IN2
8
NF2
9
POWER AMP
IC702 (2/2)
IN2
8
NF2
9
PRE
DRIVE
PRE
DRIVE
DRIVER
NF
DRIVER
NF
+VOUT2
–VOUT2
+VOUT2
–VOUT2
12
11
BIAS
Q651, 652
FINAL
DRIVER
Q653, 654
OVER LOAD
DETECT
Q670
+
–2
TM601
+
L
–
REAR
+
R
–
ON
OFF
–1
+
CENTER
–
+
AUDIO OUT
12
11
BIAS
Q601, 602
FINAL
DRIVER
Q603, 604
OVER LOAD
DETECT
Q620
D721
PROTECT
SWITCH
Q721 – 723
D203
+
RY601
S701–4–2
SPEAKERS A
Ø ON ø OFF
D725
D723
SPEAKER PROTECT
RELAY DRIVE
Q610
D728
D311, 312
J253
MIX
SPEAKERS
IMPEDANCE
USE 4 – 16Ω
E
(Page 8)
05
SP-RLY,
SURR-RLY,
PROTECT
– 9 –
PROTECT
SP-RLY
SURR-RLY
• SIGNAL PATH
: TUNER (FM)
– 10 –
STR-DE235
4-3. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –
SYSTEM CONTROLLER, FL DRIVER
IC201 (2/2)
S200
I/u
(POWER)
S201 – 220, 222 – 227,
S229 – 231, 234 – 244
44
SYS-POWER
F1 F2
F
(Page 9)
D237
REAR
D233
CENTER
Q236
Q234 – 236
LED DRIVE
BASS BOOST
D235
NAME
Q235
D228
BASS BOOST
EFFECT/
DELAY
D236
D240
MUTING
D236
Q234
REMOTE CONTROL
RECEIVER
IC203
B+ SWITCH
Q233
Q239
B+ SWITCH
Q237
D234
SET UP
LED DRIVE
Q242
D421
LED DRIVE
Q241
+5V
D241
28 – 25
49
SIRCS
37
LED SELECT
LED3
61
60
LED2
LED1
59
BASS BOOST
53
MUTING LED50
A/D-1 – A/D-4
BRIDGE-RLY
POWER-RLY
7 – 1, 80 – 78
DIG1 – DIG10
S1 – S15
77 – 72, 70 – 62
15
23
FLUORESCENT
INDICATOR
TUBE
FL201
DISPLAY SECTION B+
DOLBY SURROUND PRO-LOGIC
FUNCTION SWITCH (IC401),
AUDIO LINE AMP CIRCUIT
FL DRIVER (IC201) B–
+10V
CIRCUIT (IC300, 301) B+
FM/AM TUNER PACK,
RDS DECODER (IC1) B+
POWER AMP
CIRCUIT
–24V
RELAY B+
+5V
+5V
+12V
–12V
B+
B–
–24V
REGULATOR
Q801
BRIDGE
RELAY DRIVE
Q809
+5V
REGULATOR
IC804
+10V
REGULATOR
IC805
+5V
REGULATOR
IC803
–12V
REGULATOR
IC802
RECT
D803
RECT
D802
REGULATOR
RY801
+12V
IC801
–1
–2
TO FL201
POWER ON/OFF
RELAY DRIVE
Q802
RECT
D820 – 823
F1
F2
T901
POWER
TRANSFORMER
RY901
AEP
CNJ903
AC OUTLET
SWITCHED
100W MAX
05
– 11 –
D231
CINEMA
D232
MUSIC
LED DRIVE
Q231
LED DRIVE
Q232
C.STUDIO LED
39
40
HALL LED
RESET
STOP
SYSTEM CONTROLLER
(IC201) B+
17
47
+5V
RESET SWITCH
Q201, 202
D201, 202
+5.6V
REGULATOR
Q951
RESET SIGNAL GENERATOR,
+5.6V REGULATOR
IC950
OUTC
3
VSC
2
RESET
8
VSA
7
5
V+
VREF
LATCH
– 12 –
DET
T902
POWER
TRANSFORMER
RECT
D810 – 813
VSB
AC
RECT
6
D814, 815
AC IN
4-4. NOTES FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
PRIMARY board
SECONDARY board
STANDBY board
MAIN board
DISPLAY board
POWER SWITCH
board
SP SW board
KEY board
TONE board
VOLUME board
• Circuit Boards Location
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
Q
B
CE
These are omitted.
Q
B
CE
These are omitted.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
¢
•
• 2 : nonflammable resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted line
• U : B+ Line.
• V : B– Line.
• Voltages and waveforms are dc with respect to ground
• Voltages are taken with a V OM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
with mark ! are critical for safety.
Replace only with part number specified.
under no-signal (detuned) conditions.
no mark : TUNER (FM)
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : TUNER (FM)
4
W or less unless otherwise
– 13 –
– 14 –
STR-DE235
4-5. PRINTED WIRING BOARD – MAIN Board– • See page 14 for Circuit Boards Location.
(Page 17)
(Page
17)
(Page 17)
• Semiconductor Location
Ref. No. LocationRef. No. Location
D300 G-3
D311 H-7
D312 H-6
D421 H-6
D610 B-6
D710 H-11
D721 G-5
D722 G-5
D723 H-5
D724 G-5
D725 G-5
D726 G-5
D727 H-5
D728 H-5
D801 H-7
D802 D-12
D803 E-12
D804 H-7
D810 B-13
D811 B-13
D812 B-12
D813 B-12
D814 B-12
D815 B-12
D818 C-13
D820 C-12
D821 C-12
D822 C-12
D823 C-12
IC1 B-1
IC300 E-3
IC301 G-4
IC302 F-1
IC401 B-3
IC701 G-7
IC702 C-7
IC801 D-5
IC802 D-5
IC803 A-2
IC804 E-5
IC805 D-3
IC950 A-10
Q361 H-2
Q362 H-2
Q363 H-2
Q365 H-2
Q401 H-6
Q402 C-6
Q451 E-7
Q452 H-5
Q601 C-7
Q602 B-8
Q603 C-8
Q604 B-8
Q610 B-6
Q620 C-7
Q651 F-8
Q652 F-8
Q653 F-8
Q654 E-8
Q670 F-8
Q701 H-7
Q702 H-8
Q703 H-8
Q704 G-8
Q710 H-11
Q720 G-7
Q721 G-5
Q722 G-6
Q723 G-5
Q751 D-7
Q752 D-8
Q753 E-8
Q754 D-8
Q770 D-7
Q801 H-8
Q802 B-13
Q809 C-13
Q951 A-10
(Page 18)
(PAGE
31)
(Page 17)
(Page 27)(Page 31)
– 15 –
– 16 –
4-6. PRINTED WIRING BOARDS – SP SW Board/SECONDARY Board/STANDBY Board/PRIMARY Board – • See page 14 for Circuit Boards Location.
(Page 16)
(Page 16)
STR-DE235
(Page 16)
(Page 16)
(Page 16)
(Page 17)
(Page 18)
– 17 –
– 18 –
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