Sony STR-DE925 User Manual

STR-DE925/V919
US Model
Canadian Model
E Model
PX Model
STR-DE925
Chinese Model
STR-V919
SERVICE MANUAL
— Continued on next page —
SPECIFICATIONS
Dolby Laboratories Licensing Corporation.
“DOLBY” the double-D symbol a “AC-3” and “PRO LOGIC” are
trademarks of Dolby Laboratories Licensing Corporation.
FM STEREO FM-AM RECORDER
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
Ver 1.1 2003. 06
9-922-896-12
2003F16-1
© 2003.06
Photo : STR-DE925
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from 20 - 20,000 Hz; rated
110 watts per channel minimum RMS power, with no more than
0.09% total harmonic distortion from 250 milliwatts to rated output
(USA model only).
Amplifier section
POWER OUTPUT
Stereo mode (8 ohms 20 Hz - 20 kHz, THD 0.09%)
110 W + 110 W
Surround mode (8 ohms at 1 kHz, THD 0.8%)
Front: 110 W/ch
Center
a)
: 110 W
Rear
a)
: 110 W/ch
a)Depending on the sound field settings and the source, there may be no
sound output.
Dynamic power output
165 W + 165 W, 8 ohms
230 W + 230 W, 4 ohms
Harmonic distortion at rated output
Less than 0.09% (with sound field, tone, and bass
booster bypassed)
Frequency response
PHONO: RIAA
equalization curve
±0.5 dB
CD, TAPE, MD/DAT, TAPE/MD, DVD/LD, TV/DBS,
VIDEO 1, 2, and VIDEO 3 :
10 Hz - 50 kHz +0.5/-2 dB (with sound field, tone,
and bass booster bypassed)
Inputs (Analog) PHONO:
Sensitivity: 2.5 mV
Impedance: 50 kilohms
S/N
b)
: 75 dB (A, 2.5 mV
c)
)
CD, DVD/LD, TAPE, MD/DAT, TAPE/MD, TV/DBS,
VIDEO 1, 2, and VIDEO 3 :
Sensitivity: 150 mV
Impedance: 50 kilohms
S/N
b)
: 82 dB (A, 150 mV
c)
)
b)78’ IHF
c)Weighted network, input level
Inputs (Digital) DVD/LD (coaxial):
Sensitivity: -
Impedance: 75 ohms
S/N: 100 dB (A, 20 kHz LPF)
DVD/LD, TV/DBS, MD/DAT (Optical):
Sensitivity: -
Impedance: -
S/N: 100 dB (A, 20 kHz LPF)
Outputs TAPE, MD/DAT, TAPE/MD, (REC OUT); VIDEO 1, 2
(AUDIO OUT):
Voltage: 150 mV
Impedance: 10 kilohms
WOOFER:
Voltage: 2 V
Impedance: 1 kilohms
PHONES:
Accepts low - and high-impedance headphones

Sony STR-DE925 Specifications

General

Channels	5.1
Frequency Response	10 Hz - 100 kHz
Total Harmonic Distortion	0.05%
Tuning range	FM/AM
Input Sensitivity	200 mV
Signal-to-Noise Ratio	100 dB
Speaker load impedance	8 ohms
Digital inputs	Optical, Coaxial
Video Connections	Composite, S-Video
Power Output	100 W per channel (8 ohms, 20 Hz - 20 kHz, 0.09% THD)

Summary

Service Manual STR-DE925/V919

Product Specifications Overview

Comprehensive technical details including power output, inputs, and outputs.

System Block Diagrams

Main Section Architecture

Illustrates the overall system architecture and signal flow.

Power Section Architecture

Shows the power supply and distribution within the unit.

Circuit Schematics - Core Components

Amplifier Circuitry Details

Detailed circuit diagram for the amplifier stages.

Video and Display Circuits

Circuit diagram for video processing, switching, and display control.

Audio and Input Circuits

Circuit diagram for audio signal processing and input selection.

Speaker Output and Protection Circuits

Circuit diagram for speaker output and protection mechanisms.

Power Supply Schematic Details

Detailed circuit diagram for the power supply and regulators.

Digital Processing Circuits

Circuit diagram for digital signal processing and control logic.

Printed Wiring Board Layouts

Power Section Component Layout

Shows the physical component layout for the power section.