Sony STR-K990 Service Manual

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SERVICE MANUAL

Ver. 1.0 2007.03
• 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.
TE
L 13942296513
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
1)
Power Output
Stereo mode (6 ohms, 1 kHz, THD 1%)
2)
Surround mode (reference) (6 ohms, 1 kHz,
THD 10%)
www
.
Sony Corporation
9-887-508-01
Home Audio Division
2007C16-1
Published by Sony Techno Create Corporation
© 2007.03
http://www.xiaoyu163.com
1)
Measured under the following conditions:
Area code
US, Canadian
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
Digital (Coaxial) Impedance: 75 ohms
Outputs (Analog)
AUDIO OUT
90 W + 90 W
SUB WOOFER
Tone
RMS output
Gain levels
FRONT:140 W
per channel
Reproduction frequency range:
CENTER:140 W
SURROUND:140 W
per channel
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STR-K990
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SPECIFICATIONS
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Power requirements
120 V AC, 60 Hz
Sensitivity: 800 mV/
50 kohms
Voltage: 800 mV/
10 kohms
Voltage: 2 V/1 kohm
±6 dB, 1 dB step
28 – 20,000 Hz
MULTI CHANNEL AV RECEIVER
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Canadian Model
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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
With 9-kHz tuning scale:
531 – 1,710 kHz
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.
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US Model
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