Sony STR-DE685 Service Manual

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 –

Sony STR-DE685 Specifications

General

Channels	5.1
Total Harmonic Distortion	0.09%
Power Output	100 W per channel (8 ohms, 20 Hz - 20 kHz, 0.09% THD)
Tuning range	AM/FM
Frequency response	10 Hz - 100 kHz
Speaker load impedance	8 ohms
Digital inputs	1 x Optical, 1 x Coaxial
Video Connections	Composite video inputs

Summary

Audio Power Specifications

Power Output and Total Harmonic Distortion

Specifies RMS power output and total harmonic distortion for minimum power.

Amplifier Section Power Output

Details rated power output for stereo mode across different area codes.

Specifications Overview

Tuner Section Specifications

Safety Information

Safety Check-out and Leakage Test

Details safety checks, including AC leakage testing procedures and limits.

Safety-Related Component Warnings

Highlights critical components that are essential for safe operation.

Remote Control Operation

Disassembly Procedures

Test Modes

Diagrams

IC Pin Descriptions (IC1201 DSP) Part 1/2

Lists pin functions and descriptions for the DSP IC (part 1/2).

IC1201 Pin Descriptions (DSP) Part 2/2

Continues pin functions and descriptions for the DSP IC.

IC1601 Pin Descriptions (System Control) Part 1/2

Lists pin functions and descriptions for the System Control IC (part 1/2).

IC1601 Pin Descriptions (System Control) Part 2/2

Continues pin functions and descriptions for the System Control IC.

Block Diagrams

Tuner/Audio Section Block Diagram

Illustrates the signal flow within the tuner and audio processing sections.

Digital Section Block Diagram

Shows the signal paths and interconnections within the digital processing circuitry.

Key/Display Section Block Diagram

Illustrates the operation of the front panel controls and display elements.

Video Section Block Diagram

Depicts the signal flow and processing for video inputs and outputs.

Power Section Block Diagram

Shows the power supply distribution and regulation circuitry.

Circuit Boards Location and Waveforms

Circuit Diagrams and Layouts

Main Board Schematics and PWB

Provides printed wiring board layout and schematic diagrams for the main board.

Digital Board Schematics and PWB

Shows printed wiring boards and schematics for the digital section (parts 1 & 2).

Display Board Schematics and PWB

Presents printed wiring boards and schematics for the display section.

Video and S-Video Sections Schematics and PWB

Covers printed wiring boards and schematics for video, S-Video, and Speaker B sections.

Power Section Schematics and PWB

Provides printed wiring boards and schematics for the power supply section.

IC Block Diagrams

IC301/IC302 Component Video Board Diagrams

Block diagrams and pinouts for IC301 (multiplexer) and IC302 (amplifier) on the component video board.

Exploded Views

Electrical Parts List