Sony STR-K685 Service Manual

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.
Amplifier section
Models of area code SP, SP6, E51, MX, TH
1)
Power Output
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
70 W + 70 W
2)
Surround mode (reference)
(6 ohms 1 kHz, THD 10%)
RMS output
FRONT:100 W
per channel
CENTER: 100 W
SURROUND: 100 W
per channel
2)
Surround mode (reference)
(10 ohms 100 Hz, THD 10%)
SUB WOOFER: 60 W
per channel
Models of area code AR
1)3)
Power Output
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
70 W + 70 W
65 W + 65 W
Sony Corporation
9-887-654-03
Home Audio Division
2007G16-1
Published by Sony Techno Create Corporation
© 2007.07
SPECIFICATIONS
2)
Surround mode (reference)
(6 ohms 1 kHz, THD 10%)
2)
Surround mode (reference)
(10 ohms 100 Hz, THD 10%)
1)
Measured under the following conditions:
Area code
SP, SP6, AR, TH
1)
E51
3)
MX
STR-K685
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
RMS output
sound output.
FRONT:
3)
Measured under the following conditions:
1)
100 W per channel
3)
90 W per channel Area code
CENTER:
AR
1)
100 W
3)
90 W
Inputs
SURROUND:
Analog
1)
100 W per channel
3)
90 W per channel
Digital (Coaxial) Impedance: 75 ohms
Tone
Gain levels
SUB WOOFER:
Reproduction frequency range:
1)
60 W per channel
3)
50 W per channel
FM tuner section
Tuning range
Antenna
Power requirements
Antenna terminals
230 V AC, 50 Hz
Intermediate frequency
240 V AC, 50 Hz
127 V AC, 60 Hz
FM STEREO/FM-AM RECEIVER
E Model
Power requirements
220 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
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