Sony STR-K790 Service Manual

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SERVICE MANUAL
Ver. 1.1 2007.03
• STR-K790 is the tuner and the amplifier section
in HT-DDW790 and HT-DDW795.
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 85 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 (rated) (6 ohms 1 kHz, THD 1%)
85 W + 85 W
2)
Surround mode (reference)
(6 ohms 1 kHz, THD 10%)
RMS output
FRONT:133 W
per channel
CENTER: 133 W
SURROUND: 133 W
per channel
2)
Surround mode (reference)
(6 ohms 100 Hz, THD 10%)
SUB WOOFER: 135 W
www
.
Sony Corporation
9-887-542-02
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
AEP, UK
2)
Reference power output for front, center, surround
speakers and sub woofer. Depending on the sound
field settings and the source, there may be no
sound output.
Inputs
Analog
Digital (Coaxial) Impedance: 75 ohms
Tone
Gain levels
Reproduction frequency range:
FM tuner section
Tuning range
Antenna
Antenna terminals
Intermediate frequency
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STR-K790
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SPECIFICATIONS
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Power requirements
120 V AC, 60 Hz
230 V AC, 50 Hz
Sensitivity: 800 mV/
50 kohms
±6 dB, 1 dB step
28 – 20,000 Hz
87.5 - 108.0 MHz
FM wire antenna
75 ohms, unbalanced
10.7 MHz
FM STEREO/FM-AM RECEIVER
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US Model
Canadian Model
AEP Model
UK Model
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AM tuner section
Tuning range
Models of area code US, Canadian
With 10-kHz tuning scale:
530 – 1,710 kHz
With 9-kHz tuning scale:
531 – 1,710 kHz
Models of area code AEP, UK
With 9-kHz tuning scale:
531 – 1,602 kHz
Antenna Loop antenna
Intermediate frequency
450 kHz
4)
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 DIMMER, 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.
General
Power requirements
Area code Power requirements
US, Canadian 120 V AC, 60 Hz
AEP, UK 230 V AC, 50/60 Hz
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