1
SERVICE MANUAL
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 2)
Reference Power Output
(8 ohms 1 kHz, THD 0.7 %)
FRONT 1) :
100 W/ch
CENTER 1) :
100 W
SURR 1) :
100 W/ch
SURR BACK 1) :
100 W (DE985)
Models of area code E23, MX
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
100 W + 100 W 2)
SPECIFICATIONS
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
E23
240 V AC, 50 Hz
US, CND, MX
120 V AC, 60 Hz
Frequency response
PHONO
RIAA equalization curve
±0.5 dB
MULTI CH IN (1, 2) 5),
10 Hz 70 kHz
CD/SACD, TAPE 5),
+0.5/2 dB (with sound
MD/DAT 5), MD/TAPE 6),field and equalizer bypassed)
TV/SAT, DVD/LD,
VIDEO 1, 2, 3
Ver 1.2 2002. 11
9-874-060-03
2002K0400-1
© 2002. 11
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
Continued on next page
US Model
Canadian Model
STR-DE885/DE985
E Model
STR-DE885
Photo: STR-DE885
This receiver incorporates Dolby* Digital and Pro
Logic Surround and the DTS** Digital Surround
System.
*
Manufactured under license from Dolby
Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are
trademarks of Dolby Laboratories.
** "DTS", "ES" and "DTS Digital Surround" are
registered trademarks of Digital Theater Systems,
Inc.
STR-DE885/DE985
2
STR-DE885/DE985
Inputs (Analog)
PHONO
Sensitivity: 4 mV
Impedance: 50 kilohms
S/N 3) :86 dB (A, 4 mV 4))
MULTI CH IN (1, 2) 5),
Sensitivity: 250 mV
CD/SACD, TAPE 5),
Impedance: 50 kilohms
MD/DAT 5), MD/TAPE 6),
S/N 3) : 96 dB (A, 250 mV 4))
TV/SAT, DVD/LD,
VIDEO 1, 2, 3
3) INPUT SHORT (with sound field , equalizer and bass boost
bypassed).
4) Weighted network, input level.
5) STR-DE985
6) STR-DE885
Inputs (Digital)
DVD/LD (Coaxial)
Sensitivity:
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
CD/SACD, TV/SAT,
Sensitivity:
MD/DAT 5), MD/TAPE 6),
Impedance:
VIDEO 3 (Optical)
S/N: 100 dB
(A, 20 kHz LPF)
Outputs (Analog)
MD/DAT 5),Voltage: 250 mV
MD/TAPE 6) (OUT),
Impedance: 10 kilohms
VIDEO1, 2 (AUDIO OUT)
SUB WOOFER,
Voltage: 2 V
SURR BACK,
Impedance: 1 kilohms
2ND ROOM 5)
Outputs (Digital)
MD/TAPE (Optical)
Sensitivity:
EQ
BASS:
99 Hz 1.0 kHz
(21 steps)
MID:
198 Hz 10 kHz
(37 steps)
TREBLE:
1.0 kHz 10 kHz
(23 steps)
Gain levels:
±10 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 7)
With 9-kHz tuning scale: 531 1710 kHz 7)
Models of area code E23, MX
With 10-kHz tuning scale: 530 1610 kHz 7)
With 9-kHz tuning scale: 531 1602 kHz 7)
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
7) 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
E23
120/220/240 V AC, 50/60 Hz
Power consumption
Area code
Power consumption
US
STR-DE985: 265 W
STR-DE885: 210 W
CND
STR-DE985: 360 VA
STR-DE885: 300 VA
MX
210 W
E23
230 W
Power consumption (during standby mode)
0.5 W (when "POWER SAVE"
in the CUSTOMIZE menu is
set to "ON").
AC outlets
Area code
AC outlets
US, CND
2 switched, 120 W/1A MAX
E23, MX
1 switched, 100 W MAX
Dimensions
430
× 157.5 × 369 mm
(16 7/8
× 6 2/8 × 14 4/8 inches)
including projecting parts
and controls
Mass (Approx.)
9.5 kg (20 lb 16 oz)
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
Remote commander (1)
· RM-PG411 (STR-DE985)
· RM-PP411 (STR-DE885)
R6 (size-AA) batteries (2)
Audio/video/control S cord (1)
Monaural mini-plug cord (1)
Design and specifications are subject to change
without notice.
·Abbreviation
CND
: Canadian model
E23
: AC 120/220/240V area in E model
MX
: Mexican model
3
STR-DE885/DE985
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.
DE885: US
4-239-124-0s
DE885: CND
4-239-124-1s
DE885: E23
4-239-124-5s
DE885: MX
4-239-124-9s
DE985: US
4-239-222-0s
DE985: CND
4-239-222-1s
4
TABLE OF CONTENTS
1. GENERAL
Main unit ................................................................................. 5
Remote button description ....................................................... 6
2. DISASSEMBLY
2-1. Case ..................................................................................... 7
2-2. Front Panel Section ............................................................. 8
2-3. Headphone Board, Opt3 Board, Video3 Board ................... 8
2-4. Back Panel Section .............................................................. 9
2-5. Digital Board ....................................................................... 9
2-6. Standby Board ................................................................... 10
2-7. Main Board ....................................................................... 10
3. TEST MODE ..................................................................... 11
4. DIAGRAMS
4-1. IC Pin Descriptions ........................................................... 13
4-2. Circuit Boards Location .................................................... 21
4-3. Printed Wiring Boards Main Section .......................... 22
4-4. Schematic Diagram Main Section (1/3) ...................... 23
4-5. Schematic Diagram Main Section (2/3) ...................... 24
4-6. Schematic Diagram Main Section (3/3) ...................... 25
4-7. Printed Wiring Board Digital Section (1/2) ................ 26
4-8. Printed Wiring Boards Digital Section (2/2) ............... 27
4-9. Schematic Diagram Digital Section (1/4) ................... 28
4-10. Schematic Diagram Digital Section (2/4) ................... 29
4-11. Schematic Diagram Digital Section (3/4) ................... 30
4-12. Schematic Diagram Digital Section (4/4) ................... 31
4-13. Printed Wiring Board Speaker Section ....................... 32
4-14. Schematic Diagram Speaker Section .......................... 33
4-15. Printed Wiring Boards Display Section ...................... 34
4-16. Schematic Diagram Display Section ........................... 35
4-17. Printed Wiring Board Video Section ........................... 36
4-18. Schematic Diagram Video Section .............................. 37
4-19. Printed Wiring Boards S-video Section ...................... 38
4-20. Schematic Diagram S-video Section ........................... 39
4-21. Printed Wiring Board Component Section .................. 40
4-22. Schematic Diagram Component Section .................... 41
4-23. Printed Wiring Boards Power Section ......................... 42
4-24. Schematic Diagram Power Section ............................. 43
4-25. IC Block Diagrams ............................................................ 44
5. EXPLODED VIEWS
5-1. Case Section ...................................................................... 49
5-2. Front Panel Section ........................................................... 50
5-3. Chassis Section-1 .............................................................. 51
5-4. Chassis Section-2 .............................................................. 52
6. ELECTRICAL PARTS LIST ......................................... 53
STR-DE885/DE985
5
STR-DE885/DE985
SECTION 1
GENERAL
This section is extracted
from instruction manual.
List
of
Button
Locations
and
Reference
Pages
5GB
List of Button Locations and Reference Pages
Main unit
How to use this page
Use this page to find the location of buttons that are
mentioned in the text.
Illustration number
r
CUSTOMIZE qd (42, 44, 65)
RR
Name of button/part
Reference page
ALPHABETICAL ORDER
0 --9
2CH wl (31, 32)
2ND ROOM (STR-DE985 only)
wd
(28)
A --D
A. DEC ea (29, 31)
AM eg (40)
CINEMA STUDIO EX A, B, C
qf
(30)
CUSTOMIZE qd (42, 44, 65)
Digital Cinema Studio (indicator)
qj
(29)
DIGITAL CONCERT HALL A,
B qk (31)
DIMMER r; (28)
DISPLAY 4 (28, 60)
Display qg (28)
E --I
ENTER es (42)
EQ 8 (38, 64)
EQUALIZER wj (38)
FM eh (40)
FM MODE ej (40)
FUNCTION wf (26, 59)
INPUT MODE wh (26)
IR (receptor) 5 (48, 60)
J --N
Jog dial ef (20, 35, 37, 38, 42,
44, 63)
LEVEL q; (25, 37, 63)
MASTER VOLUME ws (25, 58)
MEMORY el (41)
MODE (FUNCTION) wg (26)
MODE (SOUND FIELD) e; (30,
31, 59)
MULTI/2CH ANALOG DIRECT
wk
(27)
MULTI CHANNEL DECODING
(indicator) qa (27)
MUTING wa (27, 58)
O --S
ON SCREEN (STR-DE985 only)
ra
(10)
PHONES (jack) 3 (27, 59)
PRESET TUNING +/ 6 (41,
62)
SB DEC (indicator) qh (33)
SET UP qs (20, 65)
SHIFT ek (41)
SPEAKERS A/B 2 (17, 27, 35,
58)
SURR 9 (35, 63)
SURR BACK DECODING w;
(33)
T --Z
TUNING +/ 7 (40)
VIDEO 3 DIGITAL INPUT
(jack) rd (11)
VIDEO 3 INPUT (jacks) rs (10)
VIDEO SELECT INDICATOR
ql
(26)
BUTTON DESCRIPTIONS
?/1 (power) 1 (19, 25, 39, 62)
/
ed
(20, 35, 37, 38, 42, 44,
63)
1234
56
7 89 q;qaqsqdqfqgqhqjqkql w;wa
ws
wf
wd
wg
wh
wj
wk
wl
e;
ea
es
ed
ef
eg
eh
ej
ek
el
r;
ra
rs
rd