Sony STR-K685 Service Manual

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SERVICE MANUAL
Ver. 1.2 2007.07
• STR-K685 is the tuner and the amplifier
section in HT-DDW685.
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
Amplifier section
Models of area code SP, SP6, E51, MX, TH
1)
Power Output
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
2)
Surround mode (reference)
(6 ohms 1 kHz, THD 10%)
2)
Surround mode (reference)
(10 ohms 100 Hz, THD 10%)
Models of area code AR
1)3)
Power Output
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
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Sony Corporation
9-887-654-03
Home Audio Division
2007G16-1
Published by Sony Techno Create Corporation
© 2007.07
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Surround mode
(6 ohms 1 kHz, THD 10%)
70 W + 70 W
RMS output
FRONT:100 W
per channel
CENTER: 100 W
SURROUND: 100 W
Surround mode
per channel
(10 ohms 100 Hz, THD 10%)
SUB WOOFER: 60 W
per channel
1)
Measured under the following conditions:
Area code
SP, SP6, AR, TH
1)
70 W + 70 W
E51
3)
65 W + 65 W
MX
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STR-K685
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SPECIFICATIONS
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2)
(reference)
RMS output
FRONT:
1)
100 W per channel
3)
90 W per channel
CENTER:
1)
100 W
3)
90 W
SURROUND:
1)
100 W per channel
3)
90 W per channel
2)
(reference)
SUB WOOFER:
1)
60 W per channel
3)
50 W per channel
Power requirements
230 V AC, 50 Hz
240 V AC, 50 Hz
127 V AC, 60 Hz
FM STEREO/FM-AM RECEIVER
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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.
3)
Measured under the following conditions:
Area code Power requirements
AR 220 V AC, 50 Hz
Inputs
Analog Sensitivity: 800 mV/
50 kohms
Digital (Coaxial) Impedance: 75 ohms
Tone
±6 dB, 1 dB step
Gain levels
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
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