Sony STR-DE185 Service Manual

1
SERVICE MANUAL
US Model
AEP Model
UK Model
STR-DE185
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 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
Rated Power Output at Stereo Mode
(8 ohms 40 Hz – 20 kHz, THD 0.09 %)
100 W + 100 W
Models of area code AEP, UK
Rated Power Output at Stereo Mode
(
8 ohms 1 kHz, THD 0.7 %)
100 W + 100 W
1)
1) Measured under the following conditions:
Area code Power requirements
AEP, UK 230 V AC, 50 Hz
Frequency response
CD, MD/TAPE, 20 Hz – 50 kHz
VIDEO 1, VIDEO 2 +0/–0.5 dB (with bass
boost bypassed)
Inputs (Analog)
CD, MD/TAPE, Sensitivity: 250 mV
VIDEO 1, VIDEO 2 Impedance: 50 kilohms
S/N
2)
: 85 dB
(A, 250 mV
3)
)
2) INPUT SHORT.
3) Weighted network, input level.
SPECIFICATIONS
Outputs
MD/TAPE, VIDEO 1 Voltage: 250 mV
Impedance: 10 kilohms
Bass Boost: +8 dB at 70 Hz
Tone: ±10 dB at 100 Hz and
10 kHz
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: 0.5%
Stereo: 0.8%
Separation 35 dB at 1 kHz
Frequency response 30 Hz – 15 kHz,
+0.5/–2 dB
Selectivity 60 dB at 400 kHz
Ver 1.0 2002. 02
9-873-586-01
2002B0400-1
© 2002.02
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
– Continued on next page –

Sony STR-DE185 Specifications

General

Number of Channels	2
Total Harmonic Distortion (THD)	0.09%
Output	Speaker outputs
Tuning range	FM
Speaker load impedance	8 ohms
Inputs	4 x Audio inputs, 1 x Phono input, 1 x Tape input
Outputs	tape
Power Output	100 Watts per channel (8 ohms)

Summary

Specifications

Audio Power Output and Distortion

Detailed specifications for audio output power and total harmonic distortion for various loads and frequency ranges.

Amplifier Section Details

Power output ratings for US, AEP, and UK models, including conditions and measurements.

FM Tuner Performance

Specifications for tuning range, sensitivity, S/N, distortion, separation, and selectivity.

AM Tuner Performance

Specifications for AM tuning range, sensitivity, S/N, distortion, and selectivity.

Safety Component Warnings

Critical warnings regarding safety-related components used in the unit's construction.

Safety Check-out Procedures

AC Leakage Test Methods

Procedures and recommended instruments for measuring AC leakage current from exposed metal parts.

Disassembly and Servicing

Case Removal Instructions

Step-by-step guide for safely removing the outer case of the receiver.

Front Panel Assembly Disassembly

Back Panel Component Access

Main Board Removal and Access

Steps for removing and accessing the main circuit board for servicing.

Technical Diagrams and Schematics

IC Pin Descriptions

Detailed pinout information for integrated circuits used in the system.

Circuit Board Locations

Main Section Block Diagram

High-level functional overview of the main section's signal paths.

Power Section Block Diagram

Main Section Printed Wiring Board

Main Section Schematic (Part 1)

Main Section Schematic (Part 2)

Display Section Schematic

Exploded Views and Parts Identification

Case Section Exploded View

Front Panel Exploded View

Chassis Exploded View

Electrical Parts List

Display, HP, and Main Board Components

List of capacitors, coils, ICs, transistors, and resistors for display, HP, and main boards.

Connectors, Diodes, and ICs List

Main Section Transistors and Resistors

Outlet, Relay, and Transformer Parts

Power SW, Accessories, and Miscellaneous Parts