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Sony STR-DE485 - Service Manual

Sony STR-DE485
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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 1.0 2002. 02
9-873-587-01
2002B0400-1
© 2002.02
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 –

Table of Contents

Other manuals for Sony STR-DE485

Preview: Operating Instructions
Operating Instructions88 pages
Preview: Features
Features1 page
Preview: Product Information
Product Information2 pages
Preview: Dimensions
Dimensions1 page

Questions and Answers

  • D
    davidwigginsSep 10, 2025
    What to do if RDS does not work on my Sony STR-DE485?
    • J
      jsmithSep 10, 2025
      If RDS does not work on your Sony Stereo Receiver, make sure that you’re tuned to an FM RDS station. Try selecting a stronger FM station.
  • X
    xsuttonSep 9, 2025
    Why is there no sound from the center or surround speaker on my Sony STR-DE485 Stereo Receiver?
    • M
      Michael StuartSep 9, 2025
      If there is no sound or only a very low level sound from the center or surround speaker on your Sony Stereo Receiver, ensure the sound field function is on by pressing MODE. Select a sound field containing the word “C.ST.EX”. Adjust the speaker level. Make sure the center or surround speaker size parameter is set to either “SMALL” or “LARGE.”
  • M
    Megan RoseSep 8, 2025
    What to do if recording cannot be done with my Sony STR-DE485?
    • J
      Jordan WhiteSep 8, 2025
      If recording cannot be done with your Sony Stereo Receiver, check that the components are connected correctly. Select the source component using the function buttons. Ensure that INPUT MODE is set to “ANALOG” before recording from a digital component connected to the analog MD/TAPE terminals.
  • A
    Aaron GonzalezAug 22, 2025
    How to get surround effect on my Sony STR-DE485 Stereo Receiver?
    • R
      Rachel LewisAug 23, 2025
      To enable the surround effect on your Sony Stereo Receiver, make sure the sound field function is on by pressing MODE.
  • M
    Michael Miller Jr.Sep 5, 2025
    How to eliminate hum or noise from my Sony STR-DE485?
    • J
      James WhiteSep 5, 2025
      To eliminate severe hum or noise from your Sony Stereo Receiver, check that the speakers and components are securely connected. Ensure connecting cords are away from transformers or motors, and at least 3 meters from TVs or fluorescent lights. Move your TV away from the audio components. If the plugs and jacks are dirty, wipe them with a cloth slightly moistened with alcohol.
  • V
    Virginia TuckerSep 4, 2025
    How to fix unbalanced left and right sounds on my Sony STR-DE485?
    • F
      frank67Sep 4, 2025
      To fix unbalanced or reversed left and right sounds on your Sony Stereo Receiver, first check that the speakers and components are connected correctly and securely. If the issue persists, adjust the balance parameters in the LEVEL menu.
  • S
    Scott AguilarSep 3, 2025
    What to do if there is no sound from one of the front speakers of my Sony Stereo Receiver?
    • C
      Catherine PollardSep 3, 2025
      If there is no sound from one of the front speakers of your Sony Stereo Receiver, connect headphones to the PHONES jack to see if sound is output. If not, check that all the cords are fully inserted into the jacks on both the receiver and the component. Also, check the connection of the front speaker that isn't producing sound.
  • K
    Kayla CurtisSep 2, 2025
    What to do if there is no picture on the TV screen connected to my Sony STR-DE485?
    • S
      swardSep 2, 2025
      If there is no picture or an unclear picture on the TV screen connected to your Sony Stereo Receiver, select the appropriate function on the receiver and set your TV to the appropriate input mode. Also, try moving your TV away from the audio components.
  • J
    Jermaine WatsonSep 1, 2025
    Why are radio stations not tuning in on my Sony STR-DE485 Stereo Receiver?
    • Y
      ybaileySep 1, 2025
      If radio stations are not tuning in on your Sony Stereo Receiver, check that the antennas are securely connected. Adjust the antennas, and if necessary, connect an external antenna. If the signal strength is weak, use direct tuning. If no stations have been preset, or the preset stations have been cleared, preset the stations. Also, press DISPLAY to ensure the frequency appears on the display.
  • J
    Jessica RomeroAug 30, 2025
    What to do if there is no sound from a specific component on my Sony Stereo Receiver?
    • S
      Stephanie AllisonAug 31, 2025
      If there is no sound from a specific component connected to your Sony Stereo Receiver, verify that the component is correctly connected to the appropriate audio input jacks. Ensure the connecting cords are fully inserted into the jacks on both the receiver and the component. Also, confirm that you have selected the correct component on the receiver.

Summary

STR-DE485;DE485 E Service Manual

Safety Checks and Leakage Testing

Safety Check-out and Leakage Test

Procedures for ensuring safety after service, including AC leakage testing.

Model Identification and Component Warnings

Mapping model numbers and warning about safety-critical components.

General Information and Button Guide

Button Locations and Descriptions

Remote Control Operation

Instructions for operating the unit using the RM-U306 remote control.

Test Mode Operations

Software Version, Indicator, and Key Checks

Preset and Configuration Modes

Procedures for factory preset reset, sound field clear, and AM channel step selection.

Diagrams and Schematics

IC Pin Descriptions and Circuit Board Locations

Block Diagrams by Section

Block diagrams illustrating signal flow for Tuner/Audio, Digital, Video/Display, and Power sections.

Schematic Diagrams by Section

Detailed schematics for Main, Digital, Video, Display, and Power sections.

Printed Wiring Boards

IC Block Diagrams

Exploded Views

Electrical Parts List

Capacitors, Semiconductors, and Coils

Digital Board Components

Main Board Components

Power SW, Standby, and Video Board Components

Sony STR-DE485 Specifications

General IconGeneral
Impedance8 ohms
Digital Inputs1 Optical
TypeStereo Receiver
Audio Channels5.1
Video ConnectionsComposite
Tuner TypeAM/FM
Frequency Response10 Hz - 50 kHz
Dimensions430 x 145 x 298 mm
Weight17.6 lbs
Dimensions (alternate)17.1 x 5.6 x 13.8 inches
Weight (alternate)17.6 lbs
Outputs2 Audio, 1 Video

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