1
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
Chinese Model
STR-DE685
FM STEREO/FM-AM RECEIVER
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from
20 20,000 Hz; rated 100 watts per channel
minimum RMS power, with no more than
0.09 % total harmonic distortion from 250
milliwatts to rated output (Models of area
code US only).
Amplifier section
POWER OUTPUT
Models of area code US, CND
Rated Power Output at Stereo Mode
(8 ohms 20 Hz 20 kHz, THD 0.09 %)
100 W + 100 W
Reference Power Output
(8 ohms 1 kHz, THD 0.7 %)
FRONT 1) :
100 W/ch
CENTER 1) :
100 W
SURR 1) :
100 W/ch
Models of area code AEP, UK
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
100 W + 100 W 2)
Reference Power Output 2)
(8 ohms 1 kHz, THD 0.7 %)
FRONT 1) :
100 W/ch
CENTER 1) :
100 W
SURR 1) :
100 W/ch
SPECIFICATIONS
Models of other area code
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
100 W + 100 W 2)
Reference Power Output 2)
(8 ohms 1 kHz, THD 10 %)
FRONT 1) :
120 W/ch
CENTER 1) :
120 W
SURR 1) :
120 W/ch
1) Depending on the sound field settings and the
source, there may be no sound output.
2) Measured under the following conditions:
Area code
Power requirements
E, AUS, JE
240 V AC, 50 Hz
AEP, UK, CH, SP, MY,
230 V AC, 50 Hz
AR, KR
TW
110 V AC, 60 Hz
US, CND, MX
120 V AC, 60 Hz
Frequency response
MULTI CH IN,
10 Hz 70 kHz
CD/SACD, AUX,
+0.5/2 dB (with sound
MD/TAPE, DVD/LD,
field, equalizer, and bass
VIDEO 1, 2, 3
boost bypassed)
Inputs (Analog)
MULTI CH IN,
Sensitivity: 250 mV
CD/SACD, AUX,
Impedance: 50 kilohms
MD/TAPE, DVD/LD,
S/N 3) : 96 dB
VIDEO 1, 2, 3
(A, 250 mV 4) )
3) INPUT SHORT (with sound field , equalizer and bass boost
bypassed).
4) Weighted network, input level.
Ver 1.1 2003. 08
9-873-687-02
2003H04-1
© 2003. 08
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are
trademarks of Dolby Laboratories.
"DTS" and "DTS Digital Surround" are registered
trademarks of Digital Theater Systems, Inc.
Continued on next page
2
STR-DE685
Inputs (Digital)
DVD/LD (Coaxial)
Sensitivity:
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
VIDEO 2, CD/SACD,
Sensitivity:
MD/TAPE (Optical)
Impedance:
S/N: 100 dB
(A, 20 kHz LPF)
Outputs (Analog)
MD/TAPE (OUT),
Voltage: 250 mV
VIDEO1 (AUDIO OUT)
Impedance: 10 kilohms
SUB WOOFER
Voltage: 2 V
Impedance: 1 kilohms
Outputs (Digital)
MD/TAPE (Optical)
Sensitivity:
EQ
Gain levels:
±6 dB, 1 dB step
FM tuner section
Tuning range
87.5 - 108.0 MHz
Antenna terminals
75 ohms, unbalanced
Intermediate frequency
10.7 MHz
Sensitivity
Mono:
18.3 dBf, 2.2 µV/75 ohms
Stereo:
38.3 dBf, 22.5 µV/75 ohms
Usable sensitivity
11.2 dBf, 1 µV/75 ohms
S/N
Mono:
76 dB
Stereo:
70 dB
Harmonic distortion at 1 kHz
Mono:
0.3%
Stereo:
0.5%
Separation
45 dB at 1 kHz
Frequency response
30 Hz 15 kHz,
+0.5/2 dB
Selectivity
60 dB at 400 kHz
AM tuner section
Tuning range
Models of area code US, CND
With 10-kHz tuning scale: 530 1710 kHz 5)
With 9-kHz tuning scale: 531 1710 kHz 5)
Models of area code E, MX, AR
With 10-kHz tuning scale: 530 1610 kHz 5)
With 9-kHz tuning scale: 531 1602 kHz 5)
Models of area code AEP, UK, AUS, JE, CH, SP, MY,
TW, KR
With 9-kHz tuning scale: 531 1602 kHz
Antenna
Loop antenna
Intermediate Frequency
450 kHz
Usable sensitivity
50 dB/m (at 1,000 kHz or
999 kHz)
S/N
54 dB (at 50 mV/m)
Harmonic distortion
0.5 % (50 mV/m, 400 Hz)
Selectivity
At 9 kHz:
35 dB
At 10 kHz:
40 dB
5) You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off
the receiver. Hold down PRESET TUNING + and
press ?/1 . All preset stations will be erased when
you change the tuning scale. To reset the scale to
10 kHz (or 9 kHz), repeat the procedure.
Video section
Inputs
Video:
1 Vp-p, 75 ohms
S-video:
Y: 1 Vp-p, 75 ohms
C: 0.286 Vp-p, 75 ohms
Component Video:
Y: 1 Vp-p, 75 ohms
PB B-Y: 0.7 Vp-p, 75 ohms
PR R-Y: 0.7 Vp-p, 75 ohms
Outputs
Video:
1 Vp-p, 75 ohms
S-video:
Y: 1 Vp-p, 75 ohms
C: 0.286 Vp-p, 75 ohms
Component Video:
Y: 1 Vp-p, 75 ohms
PB B-Y: 0.7 Vp-p, 75 ohms
PR R-Y: 0.7 Vp-p, 75 ohms
General
Power requirements
Area code
Power requirements
US, CND, MX
120 V AC, 60 Hz
AEP, UK
230 V AC, 50/60 Hz
CH, SP, MY, AR, KR
220 230 V AC, 50/60 Hz
E, JE
120/220/240 V AC, 50/60 Hz
TW
110 V AC, 50/60 Hz
AUS
240 V AC, 50Hz
Power consumption
Area code
Power consumption
US, MX
210 W
CND
300 VA
AEP, UK, E, AUS, JE,
180 W
CH, SP, MY, AR, KR
TW
450 W
Power consumption (during standby mode)
0.5 W (when "A.PWR" in the
SET UP menu is set to "OFF").
AC outlets
Area code
AC outlets
US, CND
1 switched, 120 W/1A MAX
AEP, UK, E, AUS, JE,
1 switched, 100 W MAX
MX, SP, MY, TW
Dimensions
430
× 157.5 × 308.5 mm
(16 7/8
× 6 2/8 × 12 1/8 inches)
including projecting parts
and controls
Mass (Approx.)
7.5 kg (16 lb 9 oz)
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
Remote commander (1)
· RM-PP411 (models of area code US, CND only)
· RM-U305C (except for models of area code US, CND)
R6 (size-AA) batteries (2)
Design and specifications are subject to change
without notice.
·Abbreviation
CND
: Canadian model
AUS: Australian model
JE
: Tourist model
CH
: Chinese model
MX
: Mexican model
SP
: Singapore model
MY
: Malaysia model
TW
: Taiwan model
AR
: Argentina model
KR
: Korean model
3
STR-DE685
MODEL IDENTIFICATION
-- BACK PANEL --
Part No.
1.5 k
0.15 µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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 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-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)
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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 PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
Area code
Part No.
Singapore
4-238-191-3s
Malaysia
4-238-191-4s
E
4-238-191-5s
AEP
4-238-191-6s
UK, Australian
4-238-191-7s
Mexican
4-238-191-8s
Argentina
4-238-191-9s
Canadian
4-238-192-2s
US
4-238-192-3s
Taiwan
4-238-192-4s
Korean
4-238-192-5s
Chinese
4-238-192-6s
Tourist
4-238-192-7s
Ver 1.1
4
TABLE OF CONTENTS
1. GENERAL
Main unit ................................................................................. 5
Remote button description (US, Canadian model only) .......... 6
Remote button description (Except US, Canadian model) ...... 7
2. DISASSEMBLY
2-1. Case ..................................................................................... 8
2-2. Front Panel Section ............................................................. 9
2-3. Headphone Board, Video3 Board ........................................ 9
2-4. Back Panel Section ............................................................ 10
2-5. Digital Board ..................................................................... 10
2-6. Standby Board ................................................................... 11
2-7. Main Board ....................................................................... 11
3. TEST MODE ...................................................................... 12
4. DIAGRAMS
4-1. IC Pin Descriptions ........................................................... 13
4-2. Block Diagram Tuner/Audio Section .......................... 17
4-3. Block Diagram Digital Section ................................... 18
4-4. Block Diagram Key/Display Section .......................... 19
4-5. Block Diagram Video Section ..................................... 20
4-6. Block Diagram Power Section .................................... 21
4-7. Circuit Boards Location .................................................... 22
4-8. Printed Wiring Boards Main Section .......................... 23
4-9. Schematic Diagram Main Section (1/2) ...................... 24
4-10. Schematic Diagram Main Section (2/2) ...................... 25
4-11. Printed Wiring Board Digital Section (1/2) ................ 26
4-12. Printed Wiring Board Digital Section (2/2) ................ 27
4-13. Schematic Diagram Digital Section (1/2) ................... 28
4-14. Schematic Diagram Digital Section (2/2) ................... 29
4-15. Printed Wiring Boards Display Section ...................... 30
4-16. Schematic Diagram Display Section ........................... 31
4-17. Printed Wiring Board Speaker B Section .................... 32
4-18. Schematic Diagram Speaker B Section ....................... 32
4-19. Printed Wiring Boards Video Section ......................... 32
4-20. Schematic Diagram Video Section .............................. 33
4-21. Printed Wiring Board S-video Section ........................ 34
4-22. Schematic Diagram S-video Section ........................... 34
4-23. Printed Wiring Board Component Video Section ....... 35
4-24. Schematic Diagram Component Video Section .......... 35
4-25. Printed Wiring Boards Power Section ......................... 36
4-26. Schematic Diagram Power Section ............................. 37
4-27. IC Block Diagrams ............................................................ 38
5. EXPLODED VIEWS
5-1. Case Section ...................................................................... 40
5-2. Front Panel Section ........................................................... 41
5-3. Chassis Section-1 .............................................................. 42
5-4. Chassis Section-2 .............................................................. 43
6. ELECTRICAL PARTS LIST ......................................... 44
STR-DE685
5
STR-DE685
SECTION 1
GENERAL
This section is extracted
from instruction manual.
5GB
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List of Button Locations and Reference Pages
Main unit
FM/AM (Models of area code
CEL, CEK only) ej (32, 33)
FM MODE (Models of area code
CEL, CEK only) ek , (Except
for models of area code CEL,
CEK) el (33)
INPUT MODE ql (23)
IR (receptor) 6 (42, 49, 55)
Jog dial eh (18, 29, 31, 37, 38)
LEVEL qs (18, 22, 29, 59)
MASTER VOLUME wk (22, 53)
MD/TAPE wa (23)
MEMORY ra (32, 34)
MODE es (26, 31, 54)
MULTI CHANNEL DECODING
(indicator) qa (23)
MULTI CH IN e; (23)
MUTING wl (24, 53)
NAME qf (37)
PHONES (jack) 3 (24, 54)
PRESET/PTY SELECT +/
(Models of area code CEL, CEK
only) 7 (34, 35)
PRESET TUNING +/ (Except
for models of area code CEL,
CEK) 7 (34, 57)
PTY (Models of area code CEL,
CEK only) el (35)
SET UP qd (4, 18, 38, 59)
SHIFT r; (34)
SPEAKERS A/B 2 (24, 29, 53)
SURR 0 (29, 59)
TUNER wg (23, 33, 34, 37)
TUNING +/ 8 (33)
VIDEO 1 w; (23)
VIDEO 2 ws (23)
VIDEO 3 wf (23)
VIDEO 3 INPUT (jacks) rs (9)
`/1 (power) 1 (4, 17, 22, 31,
32, 57)
</> eg (18, 29, 31, 37, 38)
2 CH ea (27)
A.DEC ed (25, 27)
AM (Except for models of area
code CEL, CEK) ej (32, 33)
AUX wj (23)
CD/SACD wd (23)
CINEMA STUDIO EX A,B,C qh
(26)
Digital Cinema Sound (indicator)
qj (25)
DIMMER 5 (24)
DISPLAY 4 (24, 35, 55)
Display qg (24)
DVD/LD wh (23)
ENTER ef (37)
EQ qk (31, 59)
EQUALIZER qk (31)
FM (Except for models of area
code CEL, CEK) ek (32, 33)
Use this page to find the location of buttons that are
mentioned in the text.
Illustration number
r
NAME
qf (37)
R
R
Name of button/part
Reference page