Sony STR-K990 - User Manual

SERVICE MANUAL
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
US Model
Canadian Model
MULTI CHANNEL AV RECEIVER
9-887-508-01
2007C16-1
© 2007.03
Ver. 1.0 2007.03
SPECIFICATIONS
STR-K990
• STR-K990 is the tuner and the amplifier section
in HT-DDW990.
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
DTS, Inc.
— Continued on next page —
AUDIO POWER
SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
(Models of area code US only)
With 6 ohm loads, both channels driven, from
120 – 20,000 Hz; rated 90 watts per channel
minimum RMS power, with no more than 1%
total harmonic distortion from 250 milliwatts
to rated output.
Amplifier section
Power Output
1)
Stereo mode (6 ohms, 1 kHz, THD 1%)
90 W + 90 W
Surround mode
2)
(reference) (6 ohms, 1 kHz,
THD 10%)
RMS output
FRONT:140 W
per channel
CENTER:140 W
SURROUND:140 W
per channel
1)
Measured under the following conditions:
2)
Reference power output for front, center and
surround speakers. Depending on the sound field
settings and the source, there may be no sound
output.
Inputs
Analog Sensitivity: 800 mV/
50 kohms
Digital (Coaxial) Impedance: 75 ohms
Outputs (Analog)
AUDIO OUT Voltage: 800 mV/
10 kohms
SUB WOOFER Voltage: 2 V/1 kohm
Tone
Gain levels ±6 dB, 1 dB step
Area code Power requirements
US, Canadian 120 V AC, 60 Hz
Reproduction frequency range:
28 – 20,000 Hz
FM tuner section
Tuning range 87.5 - 108.0 MHz
Antenna FM wire antenna
Antenna terminals 75 ohms, unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
With 10-kHz tuning scale:
530 – 1,710 kHz
3)
With 9-kHz tuning scale:
531 – 1,710 kHz
3)
Antenna Loop antenna
Intermediate frequency
450 kHz
3)
You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off
the receiver. While holding down TUNING
MODE, press ?/1. All preset stations will be
erased when you change the tuning scale. To reset
the scale to 10 kHz (or 9 kHz), repeat the
procedure.

Summary

Specifications

Audio Power Specifications

Power output and total harmonic distortion for US models.

FM and AM Tuner Sections

Specifications for the FM and AM tuners, including tuning range and frequency.

Safety and Component Handling

AC Leakage Test

Procedure for testing AC leakage from exposed metal parts.

General Operation and Controls

Front Panel Controls

Description of front panel buttons, jacks, and their functions.

Display Indicators

Explanation of the receiver's display panel indicators.

Rear Panel Connections

Detailed description of rear panel input and output connectors.

Remote Commander Operation

Guide to operating the remote commander and its functions.

Test, Adjustment, and Control Features

Test Modes Procedures

Instructions for various service test modes.

DCAC and VACS Control

Procedures for DCAC factory test and VACS control.

FM Auto Stop Check

Procedure for checking the FM tuner's auto stop function.

Diagrams, Schematics, and Pin Descriptions

Block Diagrams

Block diagrams illustrating the receiver's main and display/power sections.

Printed Wiring Boards - Digital Board

Schematic Diagrams - Digital Board

Printed Wiring Boards - Main Board

Schematic Diagrams - Main Board

Printed Wiring Boards - Display & Power Key

Schematic Diagrams - Display & Power Key

Printed Wiring Boards - Standby & DCDC

Schematic Diagrams - Standby & DCDC

Printed Wiring Boards - DCAC & Video3

Schematic Diagrams - DCAC & Video3

Printed Wiring Boards - Video & Headphone

Schematic Diagrams - Video & Headphone

Printed Wiring Board - HDMI SW

Schematic Diagram - HDMI SW

IC Pin Function Descriptions

Detailed pin function descriptions for key ICs.

Sony STR-K990 Specifications

General

Brand	Sony
Model	STR-K990
Category	Receiver
Language	English