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MICROFILM
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
US Model
STR-DE335/SE391
Canadian Model
AEP Model
E Model
Australian Model
STR-DE335
Chinese Model
STR-V323
STR-DE335/SE391/V323
SPECIFICATIONS
Photo: STR-DE335 US model
Audio power specifications (US model)
POWER OUTPUT AND TOTAL HAR-
MONIC DISTORTION
With 8-ohm load, both channels driven,
from 20a) ­ 20,000 Hz, rated 100 watts
per channel minimum RMS power, with
no more than 0.09 %b) total harmonic
distortion from 250 milliwatts to rated
output.
STR-SE391:
a) 40Hz
b) 0.5 %
Amplifier section
Power output
Stereo mode
STR-DE335/V323
US, Canadian models:
(8 ohms at 20 Hz ­ 20 kHz
less than 0.09 % total
harmonic distortion)
100 W + 100 W
AEP model:
(DIN 1 kHz, 4 ohms)
80 W + 80 W
Malaysia, Singapore,
Chinese, Australian
models:
Rated power:
(8 ohms at 1 kHz,
THD 0.7 %)
80 W + 80 W
Reference power:
(8 ohms at 20 Hz ­ 20 kHz,
less than 0.09 % total
harmonic distortion)
70 W + 70 W
E model:
Rated power: (8 ohms at
1kHz, THD 0.7 %)
100 W + 100 W
Reference power:
(8 ohms at 20 Hz ­ 20 kHz,
less than 0.09 % total
harmonic distortion)
95 W + 95 W
STR-SE391
(8 ohms at 40 Hz ­ 20 kHz,
less than 0.5 % total
harmonic distortion)
100 W + 100 W
Surround mode
STR-DE335/V323
and 5.1 CH/DVD
US, Canadian models:
mode
(8 ohms at 1 kHz, THD
(Reference)
0.8%)
Front: 80 W/ch
Center: (Pro Logic mode)
80 W
Rear: 80 W/ch
AEP model:
(DIN 1 kHz, 4 ohms)
Front: 70 W/ch
Center: 70 W
(only in PRO LOGIC
mode)
Rear: 70 W/ch
E, Malaysia, Singapore,
Chinese, Australian
models:
Rated power: (8 ohms at
1 kHz, THD 0.7 %)
Front: 80 W/ch
Center: (Pro Logic mode)
80 W
Rear: 80 W/ch
­ Continued on next page ­
STR-SE391
(8 ohms at 1 kHz,
THD 0.5 %)
Front: 80 W/ch
Center: (Pro Logic mode)
80 W
Rear: 80 W/ch
Reference power:
(8 ohms 20 Hz ­ 20 kHz,
less than 0.09 % total
harmonic distortion)
Front: 70 W/ch
Center: (Pro Logic mode)
70 W
Rear: 70 W/ch
RMS power:
(8 ohms at 1 kHz,
THD 10 %)
Front: 100 W/ch
Center: (Pro Logic mode)
100 W
Rear: 100 W/ch
Frequency
PHONO: RIAA
response
equalization curve ±0.5 dB
(STR-SE391)
TV/SAT (TV/LD), CD,
MD/TAPE, VIDEO
5.1 CH/DVD:
10 Hz ­ 50 kHz ± 1 dB


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­ 2 ­
Inputs
Sensitivity
Impedance
S/N
PHONO
(STR-
4 mV
50
70 dB
SE391)
kilohms
CD,
5.1 CH/
150 mV
DVD,
(AEP model)
50
MD/TAPE,
250 mV
kilohms
80 dB
TV/SAT,
(EXCEPT
(TV/LD)
AEP models)
VIDEO
Outputs
MD/TAPE REC OUT:
Voltage: 150 mV, (US, AEP
models)
Voltage: 250 mV,
(Canadian, E, Malaysia,
Singapore, Australian and
Chinese models)
Impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV, (US,
AEP models)
Voltage: 250 mV,
(Canadian, E, Malaysia
Singapore, Australian and
Chinese models)
Impedance: 10 kilohms
WOOFER:
Voltage: 2V
Impedance: 1 kilohms
PHONES: Accepts low and
high impedance
headphones
Muting
Full mute
BASS BOOST
+ 10 dB at 70 Hz
TONE
± 8 dB at 100 Hz and
10 kHz
Tuner Section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5 ­ 108.0 MHz
Antenna terminals 75 ohms, unbalanced
Intermediate
10.7 MHz
frequency
Sensitivity
Mono: 18.3 dBf, 2.2
µV/75
ohms
Stereo: 38.3 dBf, 22.5
µV/75
ohms
(AEP model)
Mono: 18.3 dBf, 4.5
µV
Stereo: 38.3 dBf, 45
µV
(EXCEPT AEP models)
Usable sensitivity 11.2 dBf, 2
µV (IHF) (US
model)
11.2 dBf, 1
µV/75 ohms
(IHF)
(AEP model)
11.2 dBf, 1
µV (IHF)
(EXCEPT US, AEP
models)
S/N
Mono: 76 dB
Stereo: 70 dB
Harmonic
Mono: 0.3 %
distortion at
Stereo: 0.5 %
1 kHz
Separation
45 dB at 1kHz
Frequency
30 Hz ­ 15 kHz
dB
response
Selectivity
60 dB at 400 kHz
AM tuner section
Tuning range
AEP, Malaysia, Singapore,
Australian and Chinese
model:
531 ­ 1602 kHz (9 kHz step)
US model:
530 ­ 1710 kHz (10kHz
step)**
531 ­ 1710 kHz (9 kHz step)
Canadian, E models:
530 ­ 1610 kHz (10kHz
step)**
531 ­ 1602 kHz (9 kHz step)
Antenna
Loop antenna
Intermediate
450 kHz
frequency
Usable sensitivity 50 dB/m (at 1,000kHz or
999 kHz) (US model)
50 dB/m (at 999 kHz)
(EXCEPT US models)
S/N
54 dB (at 50 mV/m)
Harmonic
0.5 % (50 mV/m, 400Hz)
distortion
Selectivity
At 9 kHz: 35 dB
At 10 kHz: 40 dB
** You can change the AM tuning interval be-
tween 9 kHz and 10 kHz. Turn off the re-
ceiver and press
1/u (power) for more than
4 seconds until "INITIAL" appears.
1) After tuning in any AM station, turn off
the receiver.
2) Hold down PRESET TUNING + button
and press the
1/u (power) button. "9k
STEP" appears.
To change to 10k Step, repeat step 1 and 2 until
"10k STEP" appears. Note that all preset
stations, index names and sound field are
cleared after you make the procedure above.
Video section (STR-DE335/V323)
Inputs
VIDEO, TV/SAT (TV/LD),
5.1 CH/DVD:
1 Vp-p 75 ohms
Output
VIDEO, MONITOR:
1 Vp-p 75 ohms
General
System
Tuner section:
PLL quartz-locked digital
synthesizer system
Preamplifier section:
Low-noise NF type
equalizer
Power amplifier section:
Pure-complementary
SEPP
Power
US, Canadian models:
requirements
120 V AC, 60 Hz
Australian model:
240 V AC, 50 Hz
AEP, Malaysia, Singapore
and Chinese models:
230 V AC, 50/60 Hz
E model
120/220/240 V AC, 50/60 Hz
Power
US model: 230 W
consumption
Canadian model:
325 VA
AEP model: 225 W
Malaysia, Singapore and
Australian and Chinese
models:
235 W
E model
245 W
+0.5
­2
AC outlets
STR-DE335
US, Canadian models:
1 switched, 120 W/1A max
STR-DE335
AEP, E, Malaysia,
Singapore, Australian
models:
STR-V323
1 switched, 100 W max
STR-SE391
2 switched, total 120 W/1A
max
Dimensions
430
× 144 × 306 mm
Mass (Approx.)
STR-DE335: US model
8.7 kg
STR-DE335: AEP model
7.7 kg
EXCEPT DE335: US, AEP
models
8.8 kg
Supplied
FM wire antenna (1)
accessories
AM loop antenna (1)
Remote commander
(remote) (1)
Size AA (R6) batteries (2)
The specification measured is under
· 230 AC, 50Hz condition (AEP, Malaysia,
Singapore and Chinese models)
· 240 AC, 50Hz condition (Australian model)
Design and specifications are subject to change
without notice.


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­ 3 ­
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 MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 4
2.
GENERAL ................................................................... 5
3.
DISASSEMBLY ......................................................... 7
4.
TEST MODE ............................................................... 9
5.
DIAGRAMS
5-1. Block Diagram ­ MAIN Section (1/2) ­ ....................... 11
5-2. Block Diagram ­ MAIN Section (2/2) ­ ....................... 13
5-3. Block Diagram ­ DISPLAY/
POWER SUPPLY Section ­ ........................................... 15
5-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 17
5-5. Printed Wiring Board ­ MAIN Board ­ ........................ 21
5-6. Printed Wiring Boards ­ REAR AMP Board/
SP SW Board/SECONDARY Board/
STANDBY Board/PRIMARY Board/
VOL SEL Board ­ ........................................................... 23
5-7. Schematic Diagram ­ MAIN Board (1/4)/
REAR AMP Board ­ ....................................................... 25
5-8. Schematic Diagram ­ MAIN Board (2/4)/
SP SW Board ­ ............................................................... 27
5-9. Schematic Diagram ­ MAIN Board (3/4) ­ .................. 29
5-10. Schematic Diagram ­ MAIN Board (4/4)/
SECONDARY Board /STANDBY board/
PRIMARY Baord/VOL SEL Board­ ............................. 31
5-11. Printed Wiring Board ­ PANEL Section ­ .................... 33
5-12. Schematic Diagram ­ PANEL Section ­ ....................... 35
5-13. Printed Wiring Boards ­ VOLUME Board/
TONE Board/VIDEO Board/PHONO Board ­ .............. 37
5-14. Schematic Diagram ­ VOLUME Board/
TONE Board/VIDEO Board/PHONO Board ­ .............. 39
5-15. IC Pin Function Description ........................................... 44
6.
EXPLODED VIEWS ................................................ 46
7.
ELECTRICAL PARTS LIST ............................... 50
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
!
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.


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­ 4 ­
SECTION 1
SERVICING NOTES
MODEL IDENTIFICATION
­ Rear view ­
1234
PART No.
MODEL
PART No.
DE 335: US model
4-218-844-0[]
DE 335: Canadian model
4-218-844-1[]
DE 335: Australian model
4-218-844-2[]
DE 335: Malaysia, Singapore models
4-218-844-3[]
V 323
4-218-844-4[]
DE 335: E model
4-218-844-5[]
DE 335: AEP model
4-218-844-6[]
SE 391
4-218-844-7[]
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC 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 microamperes).
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-operated AC voltmeter. The "limit" indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15
µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground


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­ 5 ­
SECTION 2
GENERAL
1 I/u button
2 TUNING +, ­ buttons
3 DISPLAY button
4 PRESET/TUNING +, ­ buttons
(EXCEPT AEP model)
PRESET/PTY SELECT +, ­ buttons
(AEP model)
5 RDS PTY button
(AEP model)
6 AM button
(EXCEPT AEP models)
RDS EON button
(AEP model)
7 FM button
(EXCEPT AEP models)
FM/AM button
(AEP model)
8 VIDEO button
9 TV/SAT button
(US, Canadian, Australian models)
TV/LD button
(AEP, E, Malaysia, Singapore,
Chinese models)
Location of controls
­ Front view ­
0 MD/TAPE button
!¡ 5.1 CH/DVD button and indicator
!TM SOUND FIELD + MODE, ON/OFF,
­ MODE buttons
!£ SET UP button and indicator
!¢ CINEMA indicator
! VIRTUAL indicator
!§ MUSIC indicator
!¶ BASS BOOST button and indicator
!· SPEAKERS A, B ON/OFF buttons
!ª PHONES jack
@º SHIFT button
@¡ Numeric buttons
@TM DIRECT button
@£ MEMORY button
@¢ FM MODE button
@ CD button
@§ TUNER button
@¶ PHONO button (SE391)
@· EFFECT/DELAY button and indicator
@ª CENTER button and indicator
#º ­ button
#¡ + button
#TM REAR button and indicator
#£ ENTER button
#¢ NAME button and indicator
# VOLUME control
#§ MUTING button and indicator
#¶ TREBLE control
#· BASS control
#ª BALANCE control
3
4 5
12
67
!
89
0
!TM
!£!¢
@º @¡ @TM @£
@ @[email protected]
@[email protected]#º #¡#TM #¢
#