Sony STR-DE225 User manual

STR-DE225/DE325
AEP Model
Canadian Model
STR-DE225/DE325
US Model
E Model
Australian Model
Chinese Model
STR-DE325
UK Model
STR-DE225
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY”, “PRO LOGIC” and the double-D symbol are
trademarksofDolbyLaboratoriesLicensingCorporation.
MICROFILM
SPECIFICATIONS
Photo : STR-DE225
Amplifier section
Power output
Stereo mode (DIN 1 kHz, 4 ohms)
STR-DE325: 90 W + 90 W
STR-DE225: 40 W + 40 W
Surround (DIN 1 kHz, 4 ohms)
mode Front: STR-DE325: 90W/ch
STR-DE225: 40W/ch
Centre: STR-DE325: 90W
STR-DE225: 40W
(only in PRO LOG IC MODE)
REAR: STR-DE325:
(DIN 1 kHz, 4ohms) 90 W
STR-DE225: (DIN 1 kHz,
4ohms) 40 W
5.1/DVD Front: 90 W/ch
INPUT * mode (DIN 1 kHz, 4 ohms)
Centre: 90 W
(DIN 1 kHz, 4 ohms)
Rear: 45 W/ch
(DIN 1 kHz, 8 ohms)
(except STR-DE225)
Frequency PHONO: RIAA(except STR-DE225)
response equalization curve ±0.5 dB
TV / LD, CD, TAPE / MD,
VIDEO, 5.1/DVD INPUT*:
10Hz - 50kHz ±1dB
Input
Sensitivity Impedance S/N
(Weighting
network,
input level)
PHONO 50 74 dB
(STR-DE325) 2.5mV kilohms 72 dB**
(MM) (A, 2.5 mV)
CD,
5.1/DVD 200 mV
INPUT* 50 82 dB
TAPE/MD, kilohms 82 dB**
TV/LD,
VIDEO
**’78IHF
Outputs TAPE/MD REC OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
VIDEOAUDIO OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
WOOFER/MIX AUDIO
OUT:Voltage: 2V
Impedance: 10 kilohms
PHONES: Accepts low and high
impedance headphones
Muting Full mute
BASS BOOST +10dB at 70 Hz
TONE ±8dB at 100 Hz and 10 kHz
FM tuner section
Tuning range 87.5 – 108.0 MHz
Aerial terminals 75 ohms, unbalanced
Sensitivity Mono: 18.3 dBf, 2.2µV /75 ohms
Stereo: 38.3 dBf, 22.5µV /75
ohms
Usable sensitivity 11.2 dBf, 1V /75 ohms (IHF)
S/N Mono: 76 dB
Stereo: 70dB
Harmonic Mono: 0.3 %
distortion at Stereo: 0.5 %
1 kHz
Separation 45dB at 1 kHz
Frequency 30 Hz – 15kHz +0.5 dB
response
Selectivity 60 dB at 400 kHz
AM tuner section
Tuning range 531 – 1602 kHz
Aerial Loop aerial
Usable sensitivity 50 dB/m (at 999 kHz)
S/N 54 dB(at 50 mV/m)
Harmonic 0.5%(50 mV/m, 400Hz)
distortion
Selectivity 35 dB
–2
— Continued on next page —
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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— 2 —
1. GENERAL ·······························································3
2. TEST MODE····························································4
3. DIAGRAMS
3-1. Circuit Boards Location ····················································· 5
3-2. Block Diagram ··································································· 7
3-3. Schematic Diagram — Display Section — ························ 9
3-4. Printed Wiring Boards — Display Section —·················· 11
3-5. Schematic Diagram — Power Section — ························ 13
3-6. Printed Wiring Boards — Power Section — ···················· 15
3-7. Printed Wiring Boards — Main Section —······················ 17
3-8. Schematic Diagram — Main Section (1/3) — ················· 19
3-9. Schematic Diagram — Main Section (2/3) — ················· 21
3-10. Schematic Diagram — Main Section (3/3) — ················· 23
3-11. IC Pin Function Description ············································· 25
3-12. IC Block Diagrams ··························································· 27
4. EXPLODED VIEWS
4-1. Front Panel Section ·························································· 29
4-2. Chassis Section ································································· 30
5. ELECTRICAL PARTS LIST································31
TABLE OF CONTENTS
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Checkthe antenna terminals,metal trim, “metallized”knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
TheAC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operatedAC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ F1.5 k
Ω
AC
Voltmeter
(0.75V)
Earth Ground
Fig.A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK!OR DOTTED LINEWITH
MARK !ONTHE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE !SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
General
System Tuner section; PLL quartz-locked
digital synthesizer system
Preamplifier section:
Low-noise NF type epualizer
Power amplifier section:
Pure-complimentary SEPP
Power 230 V AC, 50/60 Hz
requirements
Power STR-DE325: 195 W
consumption STR-DE225: 110 W
AC outlets Switched 100 W
(except for the U.K. model)
Dimensions 430 ×145 ×295 mm
Mass(Approx.) STR-DE325: 7.4 kg
STR-DE225: 6.1 kg
Supplied FM wire aerial (1)
accessories AM loop aerial (1)
Remote controller (remote) (1)
Size AA (R6) batteries (2)
Scart adaptor (1)
Design and specifications are subject to change without notice.
Specifications indicated are measured at 230 VAC, 50 Hz
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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— 3 —
SECTION 1
GENERAL
1235
46
7
89
!º
!¡
!™
!£
!¢
!∞
!§
!¶
!•
!ª
@™
@º
@¡
#¡
@ª
#º @¢ @•
@∞
@¶
@§
@£
#™
1234
5
6
78
9!º!¡!™
LOCATION AND FUNCTION OF CONTROLS
[FRONT PANEL]
[REAR PANEL]
1POWER switch (I/u)
2CENTER LEVEL +, – buttons
3REAR LEVEL +, – buttons
4PRO LOGIC, C.STUDIO, HALL indicators
5BASS BOOST indicator
6MASTER VOLUME control
7BALANCE control
8TREBLE control
9BASS control
!º MUTING button/indicator
!¡ SURROUND ON/OFF button
!™ BASS BOOST button
!£ SURROUND EFFECT/DELAY, MODE buttons
!¢ SET UP button
!∞ TAPE/MD FUNCTION button
!§ TUNER FUNCTION button
!¶ CD FUNCTION button
!• VIDEO FUNCTION button
!ª TV/LD FUNCTION button
@º Numeric buttons
@¡ SHIFT button
@™ DIRECT TUNING button
@£ CHARACTER, DISPLAY buttons
@¢ MEMORY button
@∞ FM/AM button
@§ PRESET/CHARACTER +, – buttons
@¶ FM MODE button
@• SLEEP button
@ª TUNING/PTY SELECT +, – buttons
#º RDS PTY, EON buttons
#¡ PHONES jack
#™ SPEAKERS A, B ON/OFF buttons
1ANTENNA (FM/AM)
2ySIGNAL GND
3MIX AUDIO OUT
4AC OUTLET
5AC power cord
6FRONT SPEAKERS (A/B)
7SURROUND SPEAKERS (CENTER)
8SURROUND SPEAKERS (REAR)
9VIDEO AUDIO IN, AUDIO OUT
0TV/LD AUDIO IN
!¡ TAPE/MD IN, REC OUT
!™ CD IN
Photo : STR-DE225
Photo : STR-DE225
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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— 4 —
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.
* Procedure:
While depressing the VIDEO and the TAPE/MD buttons
simultaneously, press the power [I/u] button to turn on the main
power. The message INITIAL appears and initialization is
performed.
FLUORESCENT INDICATOR TUBETEST 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.
* Procedure:
While depressing the TV/LD and the BASS BOOST 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.
AUTO-BETICAL CHECK MODE
*To auto-scanningand memoriseof RDS station.(RDS model only).
* Procedure:
While depressing the MEMORY button, press the power [I/u]
button to turn on the main power. The messageAUTO BET appears
and each function is selected one after another.
AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE
* Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step. (for US, CND and E models only)
* Procedure:
Set the FUNCTION to AM. Turn off the main power.
Whiledepressing theTUNING+ button, pressthe power[I/u]button
to turn on the main power. Either the message 9k 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.
* Procedure:
Whiledepressing the -SURROUND- MODE button,press thepower
[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.
SOFTWAREVERSION DISPLAY MODE
* The software version is displayed.
* Procedure:
While depressing the TUNER and the BASS BOOST buttons
simultaneously, press the power [I/u] button to turn on the main
power. The software version is displayed.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

— 5 —
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
PRIMARY board
DISPLAY board
SP-SW board
10 KEY board
VR-TONE board
VOLUME board
MAIN board
MIX-OUT board
STAND BY board
SECONDARY board
SP-SW-A board
SP-SW-B board
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http://www.xiaoyu163.com
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— 6 —
For schematic diagrams.
Note:
• 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 Ωand 1/4W 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
• Voltages aretaken witha VOM(Input impedance10 MΩ).
Voltage variationsmay benoted dueto normal production
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
F: FM
• Abbreviation
CND : Canadian
EE : East European
AUS : Australian
CH : Chinese
G : German
MY : Malaysia
SP : Singapore
EA : SaudiArabia
THIS NOTE IS COMMON FOR PRINTEDWIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For printed wiring boards.
Note:
•X: parts extracted from the component side.
•®: Through hole.
•¢: internal component.
•b: Pattern from the side which enables seeing.
Note:
The components identified by
mark !or dotted line with mark
!are critical for safety.
Replace only with part number
specified.
Note:
Les composants identifiés par
une marque !sont critiques
pour la sécurité.
Ne les remplacer que par une
pièceportant lenuméro spécifié.
1IC300 32PIN (OSC)
2IC201 34PIN (X1)
8MHz
4.19MHz
5.2Vp-p
4.4Vp-p
• Waveform
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
— 7 — — 8 —
DATA
L OUTFM
AM R OUT
CLK CE TUNED STEREO T MUITE DO
R CH
FM ANT
(75Ω)
AM ANT
SDATA SCLK SLAT
AUTO STOP STEREO T MUTE DO
J401
L
R
PHONO R CH
J402
L
RR CH
L
RR CH
J403
L
RR CH
L
RR CH
VIDEO
IN
EQ AMP
IC402
+12V
REG
IC801
28
TUNER BLOCK
SIGNAL
SIG
DET OUT
L
RR CH
CD
L
RR CH
TV/LD
VIDEO
OUT
TAPE
IN
TAPE
OUT
J403 VIDEO
IN
CD
TV/LD
VIDEO
OUT
TAPE
IN
TAPE
OUT
J402
30
29
24
25
26
22
21
CL
15
DI
14
CE
13
27
23
20
S DATA S CLK SLAT
AUDIO SELECTOR
IC401
DATA
35 37
CLK
34 38
CE
30
24
L OUT
9
C OUT
22
S OUT
LT IN
45
31
32
X301
8MHz
DATA CLK
S DATA
S CLK
SURROUND
PROCESSOR
IC300 BASS
RV422 TREBLE RV421
DBFB
CONTROL
Q401,452
AMP
IC404
IC302
(1/2)
42
16
13 14
X1
4.33MHz
RDS
IC1
MUTE
Q303 BALANCE
RV423
MUTE
Q307
MUTE
Q308
VOLUME
RV404
M
DOWN
UP
BIAS
Q701,Q702
14
15
6
2
3
VEE
VCC
IN 1
+VE 1
-VE 1
13 VCC
POWER AMP
IC701
+B
-B
POWER
AMP
Q703
CURRENT
DET
Q720
POWER
AMP
Q704
PROTECTOR
Q721-723
RELAY
DRIVE
Q710
RY701
C
S(L)
S(R) SURROUND
SPEAKER
J741
PHONS
TM601
FRONT
SPEAKER
TM701
R CH
L
R
RELAY
DRIVE
Q610
RY601
D724
SPEAKER A
SPEAKER B
ON
OFF
ON
OFF
S701
R CH
R CH
R CH
BA
8 7
3 2
MOTOR
DRIVER
IC202
UP
DOWN
SYSTEM CONTROL
IC201
45
RDS CLK
46
RDS DATA
PLL DATA
T MUTE
STEREO
AUTO STOP
SIGNAL
12
S CE
9
S CLK
10
S DATA
13
S CE
53
LOW BASS
DO
T MUTE
STEREO
AUTO STOP
SIG
S LAT
S CLK
S DATA
54
MUTE FUNC
41
UP
42
DOWN
16
PROTECT
21
SP RY
22
SURR RY
VERSION
56
X1
34
X2
35
X201
4.198MHz
HALL
39
SIMULATED
38
PROLOGIC
37
MUTING
43
MUTINGHALL PROLOGIC
C
STUDIO
LED +5V
D235 D236 D237 D238 FUNCTION
KEY
A/D 2
27
A/D 1
28
A/D 3
26
S217-239
S241,242
S240
FUNCTION
KEY
S201-216
KI 1
60
KI 2
59
S200
SYSTEM
POWER
SYS POWER
44 77 72 .70 62 71
.80 78
S1 15 G1 10
S8-15
D221-223
FL201
FLOURESCENT
INDICATOR TUBE
F1 F2
F1
F2
13
-12V
REG
IC802
23
+9V REG
Q808
+12V
-24V REG
Q801
+9V
-12V
+B
-B
-24V
D802
T901
CND MODEL
D820-823 F901
RELAY
DRIVE
Q809
RY801
RY851
RY801
RY901
EXCEPT
CND MODEL
RELAY
DRIVE
Q802
CNJ902
AC
IN
F902
T902
STANDBY
IC950
6
58
DELAY
+B SW
Q951
D810-813
RESET
Q201,202
REMOTE
CONTROL
RECEIVER 21
3
D202
D201
D901
L401
LED +5V
IC201 +B
TUNER/RDS +5V
+5.6V
IC203
15
BRIDGE
23
POWER RY 47
STOP
17
RESET
49
SIRCS
IC302
(1/2)
SURROUND
AMP
8 IN 2
14
15
8
2
3
VEE
VCC
IN
+VE
-VE
13 VCC
POWER AMP
IC702
+B
-B
POWER
AMP
Q603
CURRENT
DET
Q620
POWER
AMP
Q604
12
11
+VE 2
-VE 2
POWER
AMP
Q653
CURRENT
DET
Q670
POWER
AMP
Q654
D725
D723
J253
WOOFER
25
18
19
40
11
RY852
CNJ902
S901
16
: FM
: CD (ANALOG)
• Signal Path
• RCH is omitted
: PHONO
LED SW
Q231
D239
BASS
BOOST
LED +5V
D203
AEP, UK, G, EE MODEL
EXCEPTAEP, UK, G,
EE MODEL
AEP, UK, G, EE MODEL
E, EA MODEL
AEP, G, EE, SP,
MY, AUS,CH MODEL
EXCEPT E, EA,
CH MODEL
US, CND, E,
EA MODEL
BIAS
Q651,Q652
BIAS
Q601,Q602
3-2. BLOCK DIAGRAM
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
— 9 — — 10 —
3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION —
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
12
A
B
C
D
E
F
G
H
I
J
34567891011121314
— 11 — — 12 —
Ref. No. Location
D201 B-3
D202 B-2
D203 B-3
D204 B-3
D211 A-9
D212 A-9
D213 B-9
D214 B-9
D215 B-9
D216 B-9
D217 B-9
D218 B-9
• Semiconductor Location
Ref. No. Location
3-4. PRINTEDWIRING BOARDS — DISPLAY SECTION —
1-669-293-
11
(11)
10 KEY BOARD
1
4
MODE
SET UP
TAPE/MD
PHONO TUNER TUNER
TV/LD VIDEO
CDCD
EFFECT/DELAY
SURROUND
SURROUND
ON/OFF
BASS BOOST SHIFT
DIRECT TUNING
0 9 8 7 6
2345 1
1-669-262-
11
(11)
MEMORY
DISPLAY EON PTY
RDS
CHARACTER
FM/AM FM MODE SLEEP
_
+REAR
LEVEL
_
+CENTER
LEVEL
1/
(PRO LOGIC)
(C.STUDIO)
(HALL)
1
3
1
14
2 5 14 17 31 34 35
IC201
1
24
25
40 41
64
65
80
BE B
B
E
E
DISPLAY BOARD
VR-TONE BOARD
7
9
1
1
BTO
MAIN BOARD
CNS204
GTO
MAIN BOARD
CNS701
1-669-265- 11
(11)
1-669-264-
11
(11)
BALANCE
TREBLE
MUTING
BASS
(BASS BOOST)
VOLUME BOARD
1
14
58
7
MASTER
VOLUME
M
B
B
E
E
ATO
MAIN BOARD
CNS301
RV404
FL201
PRESET
CHARACTER _
+TUNING
PTY SELECT _
+
16
DE325:AEP,G,EE
MODEL
DE325:AEP
G,EE
MODEL
DE225:AEP,G,EE,UK
DE325:AEP,G,EE
MODEL
DE225:CND
DE325:EXCEPT AEP,G,EE
MODEL DE225:AEP,G,EE,UK
DE325:AEP,G,EE
MODEL
DE225:AEP,G,EE,UK
DE325:AEP,G,EE,AUS
MODEL
DE225:
AEP,G,EE,UK
MODEL
DE325:
EE,SP,MY
MODEL
DE325:E,EA,CH
AUS,SP,MY MODEL
RD1 RD2 RD3 RD4 RD5 RD6 RD7 RD8 RD9 RD10 RD11 RD12 RD13 RD14 RD15 RD16 RD17 RD18 RD19 RD20 RD21 RD22 RD23 RD24 RD25
(Page 17)
(Page 17)
(Page 18)
Ref. No. Location
D221 B-8
D222 B-8
D223 B-8
D225 B-8
D231 B-2
D235 C-11
D236 B-11
D237 B-11
D239 C-2
D238 F-2
D421 I-1
IC201 C-6
IC202 B-1
IC203 C-10
IC404 I-3
Q201 B-3
Q202 B-4
Q231 B-2
Q401 H-3
Q402 I-2
Q451 I-2
Q452 H-2
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
— 13 — — 14 —
3-5. SCHEMATIC DIAGRAM — POWER SECTION —
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
12
A
B
C
D
E
F
G
H
I
345678910111213
— 15 — — 16 —
3-6. PRINTED WIRING BOARDS — POWER SECTION —
PRIMARY BOARD
SECONDARY BOARD
1-669
-267-
11
(11)
1-669-268-
11
(11)
F
TO
MAIN BOARD
CN801
111 T901
POWER
TRANSFORMER
12
F901
STAND BY BOARD VOL SEL BOARD
SP-SW BOARD
SW (A) BOARDSW (B) BOARD
16
1-669-270-
1-669-271-
1-669-272- 11
(11)
1-669-269- 11
(11)
1-669-266- 11
(11)
11
(11)
11
(11)
1
13
1
3
5
OFF
ON
SPEAKER B SPEAKER A
D
TO
MAIN BOARD
CN706
CTO
MAIN BOARD
CNP702
E
TO
MAIN BOARD
CNS802
1
1
2
2
1
1
1
1
2
4
13
2
2
CNJ902
AC
IN
J741
PHONES
S901
US,CND
MODEL
DE325:E,EA MODEL
DE325:E,EA
MODEL
EXCEPT DE325:E,EA MODEL
DE225:AEP,G,EE
DE325:AEP,G,EE,SP,MY,AUS,CH
MODEL
DE225:CND
DE325:US,CND,E,EA
MODEL
(Page 18)
(Page 18)
(Page 18)
(Page 18)
Ref. No. Location
D816 I-3
• Semiconductor
Location
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
12
A
B
C
D
E
F
G
H
I
J
K
3456789101112131415
1-669-261- 11
C
TO
SW(B)
BOARD
CNS702
1
5
E
B
E
B
E
E
B
B
BE
BE
EBE
B
E
EB
B
E
B
E
B
E
D
TO
STAND BY
BOARD
CNP802
TO
SECONDARY
BOARD
CNP801
TO
SP-SW
BOARD
CNP703/CNP704
BA BA BA BA
LR
FRONT SPEAKERS
TM701
REAR
RL
CENTER
SURROUND SPEAKER
TM601
MAIN BOARD
AUDIO
IN
AUDIO
OUT
AUDIO
IN
IN
IN IN REC OUT
CDPHONO VIDEOTAPE MD TV/LD
J401 J402 J403
16
A
F
TO
VOLUME BOARD
CNS402
G
TO
DISPLAY BOARD
CNS201
B
TO
TUNER
UNIT
TO
VOLUME
BOARD
CNS403
1
1
1
13
1
1
1
15
4
3
15
1630
45
8
8
916 BE 1
11
18
1
4
B
B
E
E
14
58 B
E
E
EB
E
B
E
B
E
B
BE
BE
EB
EB
B
E
B
B
B
B
E
E
BE
E
1
15
BE
BE
BE
BE
14
58
1-669-273-
11
(11)
MIX BOARD
MIX
J254
AUDIO
OUT
14
RY801
RY851,RY852:CND MODEL
RY801:EXCEPT
CND MODEL
DE225:AEP,G,EE,UK
DE325:AEP,G,EE
MODEL
DE225:AEP,G,EE,UK
DE325:AEP,G,EE
MODEL
DE225:AEP,G,EE,UK
DE325:AEP,G,EE
MODEL
DE325:AEP,G,EE
MODEL
J402 J403
EXCEPT
DE325:AEP,G,EE
MODEL
DE325:AEP,G,EE
MODEL
DE325:AEP
G,EE MODEL
CNS253
C460
(Page 11)
(Page 11)
(Page 11)
(Page 16)
(Page 16)
(Page 15)
(Page 15)
— 17 — —18 —
3-7. PRINTED WIRING BOARDS — MAIN SECTION —
Ref. No. Location
D610 D-7
D710 J-12
D721 H-6
D722 H-6
D723 I-6
D724 I-6
D725 I-6
D801 I-7
D802 F-13
D804 J-7
D810 C-14
D811 C-14
D812 C-13
D813 C-13
D814 C-13
D815 C-13
D817 F-4
D818 D-14
D820 D-13
D821 D-13
D822 D-13
D823 D-13
D901 J-3
IC1 E-3
IC300 H-5
IC302 G-3
IC401 D-5
IC402 D-3
IC701 H-8
IC702 E-7
IC801 F-7
IC802 E-6
IC950 C-11
Q303 H-2
Q304 H-2
Q307 G-2
Q308 I-2
Q601 D-8
Q602 D-9
Q603 D-9
Q604 C-9
Q610 D-7
Q620 D-8
Q651 H-8
Q652 G-9
Q653 H-9
Q654 G-9
Q670 G-8
Q701 I-8
Q702 I-9
Q703 J-9
Q704 I-9
Q710 J-12
Q720 I-8
Q721 H-6
Q722 I-7
Q723 I-6
Q751 F-8
Q752 F-9
Q753 F-9
Q754 E-9
Q770 E-8
Q801 I-7
Q802 D-14
Q808 F-4
Q809 E-14
Q951 C-11
• Semiconductor
Location
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
— 19 — — 20 —
3-8. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) —
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
— 21 — — 22 —
3-9. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) —
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

STR-DE225/DE325
— 23 — — 24 —
3-10. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) —
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
I/O
O
O
O
O
O
O
O
—
O
O
O
O
O
I
O
I
I
I
I
—
O
O
O
—
I
I
I
I
—
—
—
—
—
I
O
O
O
O
O
O
Description
Fluorescent indicator tube drive.
Power supply (+5V).
System clock.
System data.
PLL data input from TU001.
Chip enable output.
Chip enable output.
Input for model select.
Protector detect output.
Protector detect input.
System reset terminal.
Auto stop detect input.
Stereo detect input.
Ground.
Speaker relay drive.
Surround Relay.
Power relay drive.
Ground.
A/D signal input terminal.
A/D3 key input terminal.
A/D2 key input terminal.
A/D1 key input terminal.
Power supply (+5V).
Reference voltage (+5V).
Ground.
Not used (Open).
Ground.
System clock (4.19MHz).
System clock (4.19MHz).
Mute drive output for µPD2581V (IC701).
Prologic LED.
CINEMA STUDIO LED.
HALL LED.
Tuner mute drive output.
Pin Name
DIG7
DIG6
DIG5
DIG4
DIG3
DIG2
DIG1
+5V
S. CLK
S. DATA
PLL. DATA
S. CE (LC7288)
S. CE (LV100)
REAR-R
BRIDGE
PROTECT
RESET
AUTO-STOP
STEREO-IN
AVss
SP-RY
SURR-RY
POWER-RY
AVss
SIGNAL
A/D3
A/D2
A/D1
AVDD
AV. REF
GND
NC
Vss
X1
X2
IC. MUTE
PROLOGIC
SIMULATED
HALL
T. MUTE
— 25 —
3-11. IC PIN FUNCTION DESCPIRTION
• IC201 µPD78044FGF-112-3B9
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Pin No.
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
I/O
O
O
O
I
I
I
I
—
I
I
—
—
O
O
O
I
I
I
I
I
O
O
O
O
O
O
O
O
O
O
—
O
O
O
O
O
O
O
O
O
Description
Volume up.
Volume down.
Standby LED drive.
System power ON/OFF.
RDS data input.
RDS clock input.
Stop signal input from NJM2103D (IC950).
Ground.
Sircs signal input.
Power switch input terminal.
5.1ch LED drive.
Power supply (+5V).
Bass boost LED drive.
Line mute drive.
SL mute drive.
Input for model select.
Key in 4.
Key in 3.
Key in 2.
Key in 1.
SR mute drive.
Key out 15.
Key out 14.
Key out 13.
Key out 12.
Key out 11.
Key out 10.
Key out 9.
Key out 8.
Key out 7.
Connect to –24V.
Key out 6.
Key out 5.
Key out 4.
Key out 3.
Key out 2.
Key out 1.
Fluorescent indicator tube drive.
Pin Name
VOLUME UP
VOLUME DOWN
STANDBY
SYS. POWER
RDS. DATA. IN
RDS. CLK. IN
STOP
Vss
SIRCS
POWER SW
5.1ch LED
+5V
BASS BOOST
FUNC. MUTE
SL MUTE
VERSION
K14
K13
K12
K11
SR MUTE
S15
S14
S13
S12
S11
S10
S9
S8
S7
VLOAD
S6
S5
S4
S3
S2
S1
DIG10
DIG9
DIG8









Fluorescent indicator tube drive.







Fluorescent indicator tube drive.
— 26 —
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

— 27 —
3-12. IC BLOCK DIAGRAMS
• IC BLOCK DIAGRAMS
IC1 BU1922
QUALITY BIT
GENERATOR
DEFFERENTIAL
DECODER
BIPHASE
SYMBOL
DECODER
OSCILLATOR
AND
DIVIDER
57kHz
BANDPASS
(8th ORDER)
CONTAS LOOP
VARIABLE AND
FIXED DIVIDER
REFERENCE
VOLTAGE
ANTI-
ALIASING
FILTER
CLOCKED
COMPARATOR
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
RECONSTRUCTION
FILTER
141516 13 12 11 10 9
321 4 5 6 7 8
CLOCK REGENERATION
AND SYNC
VP1
RDCL TS7 OSCO OSCI VDDD VSSD TEST TSTL
D
QUAL
RDDA
Vref
MUX
VDDA
VSSA
CIN
SCOUT
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
IC401, IC500 LC7822
235
46798
1
MUTE
+ VOUT1 – VOUT1
COMP1
MF1
IN1
GND
IN2
NF2
COMP2
– VOUT2 + VOUT2
VCC1 VCC2
VEE
PROTECTOR
BIAS CIRCUIT
REG DRIVE PRE
DRIVE
1110 12 13 1514
DRIVE
PRE
DRIVE
IC701 uPC2581V
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

— 28 —
1 2 3 4 5 6 7 89
NC
OUTPUT 2
Vcc
GND
NC
INPUT 2
INPUT 1
NC
MOTOR
DRIVE
MOTOR
DRIVE
REG
SWITCH
SWITCH
OUTPUT1
IC202 BA6208
IC950 NJM2103D
1
2
3
45
6
7
8
V+
VSB/SESIN
VSA
RESET
GND
OUTC
VSC
CR
VREF
+–
–+
–
+
–
+
Q
R S
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

SECTION 4
EXPLODED VIEWS
NOTE:
• -XX, -X mean standardized parts, so they may
have some differences from the original one.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delayshould be anticipatedwhen ordering these
items.
• Themechanical parts with no reference number
in the exploded views are not supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
• Abbreviation
CND : Canadian G : German
EE : East European MY : Malaysia
AUS : Australian SP : Singapore
CH : Chinese EA : Saudi Arabia
— 29 —
When indicating parts by reference number,
please include the board name.
The components identified by mark !or
dotted line with mark !are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
!sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
4-1. FRONT PANEL SECTION
pA : VOLUME board
a
SONY
a
15
16
16
16
10
9
7
6
12
5
4
3
213
411
10
8
#1
10
pA
10
not
supplied
not
supplied
#1
#1
#1
13
14
1 4-998-717-01 KNOB (BAL)
2 X-4949-627-1 KNOB (VOL) ASSY
3 4-977-593-11 RING (DIA. 50), ORNAMENTAL
(EXCEPT US,CND)
4 4-977-358-11 CUSHION
5 4-996-698-01 EMBLEM, SONY
6 4-998-189-01 BUTTON (P-T)
7 X-4949-628-1 FRONT PANEL ASSY (DE325:US,CND)
7 X-4949-629-1 FRONT PANEL ASSY (DE225:CND)
7 X-4949-679-1 FRONT PANEL ASSY (DE325:AUS)
7 X-4949-680-1 FRONT PANEL ASSY (DE325:E,EA,CH,SP,MY)
7 X-4949-681-1 FRONT PANEL ASSY (DE325:AEP,G,EE)
7 X-4949-682-1 FRONT PANEL ASSY (DE225:AEP,G,EE,UK)
*8 1-669-263-11 10 KEY BOARD
*9 A-4407-424-A DISPLAY BOARD, COMPLETE (DE325:SP,MY)
*9 A-4407-434-A DISPLAY BOARD, COMPLETE
(DE225:CND/DE325:US,CND)
*9 A-4407-510-A DISPLAY BOARD, COMPLETE
(DE225:AEP,G,EE,UK)
*9 A-4407-515-A DISPLAY BOARD, COMPLETE (DE325:AUS)
*9 A-4407-518-A DISPLAY BOARD, COMPLETE (DE325:E,EA,CH)
*9 A-4407-521-A DISPLAY BOARD, COMPLETE (DE325:AEP,G,EE)
10 4-951-620-01 SCREW (2.6 ×8), +BVTP
*11 A-4407-436-A VR-TONE BOARD, COMPLETE
(DE225:CND/DE325:EXCEPT AEP,G,EE)
*11 A-4407-523-A VR-TONE BOARD, COMPLETE
(DE225:AEP,G,EE,UK/DE325:AEP,G,EE)
12 1-782-084-11 WIRE (FLAT TYPE) (23 CORE)
13 1-782-074-11 WIRE (FLAT TYPE) (7 CORE)
14 1-782-075-11 WIRE (FLAT TYPE) (9 CORE)
*15 4-998-206-21 CASE (413226)
16 3-710-901-11 SCREW, TAPPING
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com