STR-DE485, STR-DE485E - Sony Audio Service Manual (repair manual)

Model
STR-DE485 STR-DE485E
Pages
52
Size
5.64 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-de485-str-de485e.pdf
Date

View Sony STR-DE485 / STR-DE485E Service Manual online

1
SERVICE MANUAL
US Model
Canadian Model
E Model
Australian Model
Chinese Model
STR-DE485
AEP Model
UK Model
STR-DE485E
STR-DE485/DE485E
FM STEREO/FM-AM RECEIVER
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from
40 – 20,000 Hz; rated 80 watts per channel
minimum RMS power, with no more than
0.09 % total harmonic distortion from 250
milliwatts to rated output (STR-DE485 area
code US only).
Amplifier section
POWER OUTPUT
Models of area code US, CND
Rated Power Output at Stereo Mode
(8 ohms 40 Hz – 20 kHz, THD 0.09 %)
STR-DE485:
80 W + 80 W
Reference Power Output
(8 ohms 1 kHz, THD 0.7 %)
STR-DE485:
FRONT
 1)
 : 80 W/ch
CENTER
 1)
 : 80 W
SURR
 1)
 : 80 W/ch
Models of area code AEP, UK
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
STR-DE485E
80 W + 80 W
 2)
Reference Power Output
(8 ohms 1 kHz, THD 0.7 %)
STR-DE485E
FRONT
 1)
 : 80 W/ch
CENTER
 1)
 : 80 W
SURR
 1)
 : 80 W/ch
SPECIFICATIONS
Models of other area code
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
80 W + 80 W
 2)
Reference Power Output
 2)
(8 ohms 1 kHz, THD 10 %)
FRONT
 1)
 : 100 W/ch
CENTER
 1)
 : 100 W
SURR
 1)
 : 100 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
240 V AC, 50 Hz
SP, AEP, UK
230 V AC, 50 Hz
TW
110 V AC, 60 Hz
MX
120 V AC, 60 Hz
Frequency response
MULTI CH IN
10 Hz – 50 kHz
(STR-DE485 only), CD,
+0.5/–2 dB (with sound
MD/TAPE, DVD/LD,
field, and tone bypassed)
VIDEO 1, 2
Inputs (Analog)
MULTI CH IN
Sensitivity: 250 mV
(STR-DE485 only), CD,
Impedance: 50 kilohms
MD/TAPE, DVD/LD,
S/N
 3)
 : 96 dB
VIDEO 1, 2
(A, 250 mV
 4)
 )
3) INPUT SHORT (with sound field and tone
bypassed).
4) Weighted network, input level.
Ver 1.1  2003. 07
9-873-587-02
2003G04-1
© 2003.07
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
Photo: STR-DE485
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-DE485/DE485E
Inputs (Digital)
DVD/LD (Coaxial)
Sensitivity: –
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
VIDEO 2 (Optical)
Sensitivity: –
Impedance: –
S/N: 100 dB
(A, 20 kHz LPF)
Outputs
MD/TAPE (REC
Voltage: 250 mV
OUT), VIDEO1
Impedance: 10 kilohms
(AUDIO OUT)
SUB WOOFER
Voltage: 2 V
Impedance: 1 kilohms
Tone
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 E2, MX
With 10-kHz tuning scale: 530 – 1610 kHz
 5)
With 9-kHz tuning scale: 531 – 1602 kHz
 5)
Models of area code AUS, SP, AEP, UK, TW
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
Outputs
Video:
1 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
SP
220 – 230 V AC, 50/60 Hz
E
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
STR-DE485: 180 W
CND
STR-DE485: 260 VA
AEP, UK
STR-DE485E: 155 W
AUS, SP, E
STR-DE485: 155 W
TW
STR-DE485: 400 W
Power consumption (during standby mode)
0.5 W
Dimensions
430 
× 145 × 298 mm
(16 
7/8
 
× 5 
6/8
 
× 11 
6/8
 in.)
including projecting parts
and controls
Mass (Approx.)
7.0 kg (15lb 7 oz)
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
• STR-DE485E/DE485 only
Remote commander RM-U306 (1)
R6 (size-AA) batteries (2)
Design and specifications are subject to change
without notice.
• Abbreviation
CND
: Canadian model
AR
: Argentina model
AUS
: Australian model
CH
: Chinese model
MX
: Mexican model
SP
: Singapore model
TW
: Taiwan model
3
STR-DE485/DE485E
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
MODEL
PART No.
US
4-238-188-0s
Canadian
4-238-188-1s
Australian
4-238-188-2s
Singapore
4-238-188-3s
Chinese
4-238-188-4s
E
4-238-188-5s
AEP
4-238-188-6s
UK
4-238-188-7s
Mexican
4-238-188-8s
Argentina
4-238-188-9s
Taiwan
4-238-189-9s
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.
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.   Back Panel ........................................................................... 8
2-4.   Digital Board ....................................................................... 9
2-5.   Standby Board ..................................................................... 9
2-6.   Main Board ....................................................................... 10
3. TEST  MODE
...................................................................... 11
4. DIAGRAMS
4-1.   IC Pin Description ............................................................. 12
4-2.   Circuit Boards Location .................................................... 15
4-3.   Block Diagram – Tuner/Audio Section – .......................... 16
4-4.   Block Diagram – Digital Section – ................................... 17
4-5.   Block Diagram – Video/Display Section – ....................... 18
4-6.   Block Diagram – Power Section – .................................... 19
4-7.   Printed Wiring Boards – Main Section – .......................... 21
4-8.   Schematic Diagram – Main Section (1/2) – ...................... 22
4-9.   Schematic Diagram – Main Section (2/2) – ...................... 23
4-10. Printed Wiring Board – Digital Section (1/2) – ................ 24
4-11. Printed Wiring Board – Digital Section (2/2) – ................ 25
4-12. Schematic Diagram – Digital Section (1/2) – ................... 26
4-13. Schematic Diagram – Digital Section (2/2) – ................... 27
4-14. Printed Wiring Board – Video Section – ........................... 28
4-15. Schematic Diagram – Video Section – .............................. 29
4-16. Printed Wiring Boards – Display Section – ...................... 30
4-17. Schematic Diagram – Display Section – ........................... 31
4-18. Printed Wiring Boards – Power Section – ......................... 32
4-19. Schematic Diagram – Power Section – ............................. 33
4-20. IC Block Diagrams ............................................................ 34
5. EXPLODED VIEWS
5-1.   Case Section ...................................................................... 35
5-2.   Front Panel Section ........................................................... 36
5-3.   Chassis Section-1 .............................................................. 37
5-4.   Chassis Section-2 .............................................................. 38
6. ELECTRICAL PARTS LIST
......................................... 39
STR-DE485/DE485E

Download Sony STR-DE485 / STR-DE485E Service Manual (Repair Manual)

Here you can view online and download Sony STR-DE485 / STR-DE485E Service Manual in PDF. STR-DE485 / STR-DE485E service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony STR-DE485 / STR-DE485E Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.