Sony STR-DB870 - Service Manual

SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
SPECIFICATIONS
STR-DB870/DB1070
Photo: STR-DB870
Ver 1.0 2001.04
9-873-842-11 Sony Corporation
2001D0500-1 Home Audio Company
C 2000.4 Shinagawa Tec Service Manual Production Group
US Model
E Model
Chinese Model
STR-DB1070
Canadian Model
AEP Model
UK Model
STR-DB870/DB1070
– Continued on next page –
This receiver incorporates Dolby* Digital and Pro Logic Surround
and the DTS** Digital Surround System.
* 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.
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
U only).
Amplifier section
POWER OUTPUT
Models of area code U, CA
Rated Power Output at Stereo Mode
(8 ohms 20 Hz – 20 kHz, THD 0.09 %)
100 W + 100 W
(4 ohms 20 Hz – 20 kHz, THD 0.09 %)
90 W + 90 W
Reference Power Output
(8 ohms 20 Hz – 20 kHz, THD 0.09 %)
STR-DB1070: FRONT
1)
:100 W + 100 W
CENTER
1)
: 100 W
SURR
1)
: 100 W + 100 W
SURR BACK
1)
: 100 W
STR-DB870: FRONT
1)
: 100 W + 100 W
CENTER
1)
: 100 W
SURR
1)
: 100 W + 100 W
(4 ohms 20 Hz – 20 kHz, THD 0.09 %)
STR-DB1070: FRONT:
1)
90 W + 90 W
CENTER
1)
: 90 W
SURR
1)
: 90 W + 90 W
SURR BACK
1)
: 90 W
STR-DB870: FRONT
1)
:90 W + 90 W
CENTER
1)
: 90 W
SURR
1)
: 90 W + 90 W
Models of other area code
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
STR-DB1070: 100 W + 100 W
2)
90 W + 90 W
3)
STR-DB870: 100 W + 100 W
2)
(4 ohms 1 kHz, THD 0.7 %)
STR-DB1070: 90 W + 90 W
2)
80 W + 80 W
3)
STR-DB870: 100 W + 100 W
2)
Reference Power Output
2)
(8 ohms 1 kHz, THD 0.7 %)
STR-DB1070: FRONT
1)
: 100 W + 100 W
CENTER
1)
: 100 W
SURR
1)
: 100 W + 100 W
SURR BACK
1)
: 100 W
STR-DB870: FRONT
1)
: 100 W + 100 W
CENTER
1)
: 100 W
SURR
1)
: 100 W + 100 W
(4 ohms 1 kHz, THD 0.7 %)
STR-DB1070: FRONT
1)
: 90 W + 90 W
CENTER
1)
: 90 W
SURR
1)
: 90 W + 90 W
SURR BACK
1)
: 90 W
STR-DB870: FRONT
1)
: 100 W + 100 W
CENTER
1)
: 100 W
SURR
1)
: 100 W + 100 W
(8 ohms 20 Hz – 20 kHz, THD 0.09 %)
STR-DB1070: FRONT
1)
: 90 W + 90 W
CENTER
1)
: 90 W
SURR
1)
: 90 W + 90 W
SURR BACK
1)
: 90 W
STR-DB870: FRONT
1)
: 90 W + 90 W
CENTER
1)
: 90 W
SURR
1)
: 90 W + 90 W
(4 ohms 20 Hz – 20 kHz, THD 0.09 %)
STR-DB1070: FRONT
1)
: 80 W + 80 W
CENTER
1)
: 80 W
SURR
1)
: 80 W + 80 W
SURR BACK
1)
: 80 W
STR-DB870: FRONT
1)
: 90 W + 90 W
CENTER
1)
: 90 W
SURR
1)
: 90 W + 90 W
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 240 V AC, 50 Hz
CN, SP, CEL, KR 230 V AC, 50 Hz
TW 110 V AC, 60 Hz
3) Measured under the following conditions:
Area code Power requirements
CN 220 V AC, 50 Hz
Frequency response
PHONO
CD/SACD, TAPE,
MD/DAT, MD/TAPE,
TV/SAT, DVD/LD,
VIDEO 1, 2, 3
RIAA equalization curve
±0.5 dB
10 Hz – 100 kHz
±3 dB (with sound field,
equalizer, and bass boost
bypassed)

Summary

SPECIFICATIONS

Power Output Ratings

Power output ratings and harmonic distortion for various models and load conditions.

Electrical and Frequency Characteristics

Key electrical parameters like frequency response, selectivity, and impedance.

SAFETY AND SERVICE INFORMATION

Safety Check-out and Leakage Testing

Procedures for post-service safety checks and AC leakage measurement.

Servicing Notes and Model Identification

Guidelines for service position and identifying model-specific part numbers.

GENERAL INFORMATION

Control Locations

Identification of all controls on the front panel.

Rear Panel Layout

Identification of rear panel connectors and switches.

DISASSEMBLY PROCEDURE

Disassembly Flowchart

A flowchart detailing the step-by-step procedure for disassembling the unit.

Component Removal

Procedures for removing the unit's case and various internal circuit boards.

TEST MODES

System Initialization and Testing Modes

Modes for system reset, display tests, demo, AM step selection, and version display.

DIAGRAMS AND SCHEMATICS

Diagram Conventions and Board Locations

Explains diagram conventions and shows circuit board locations.

Schematic Diagrams

Detailed circuit schematics for various boards like Digital, Main, Video, etc.

Sony STR-DB870 Specifications