Sony STR-K785 Service Manual

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3 7 63 1515 0

SERVICE MANUAL

Ver. 1.2 2007.07
• STR-K785 is the tuner and the amplifier
section in HT-DDW785 and HTP-78DW.
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
Digital Theater Systems, Inc.
TE
Amplifier section L 13942296513
1)
Power Output
Models of area code SP and SP6
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
2)
Surround mode (reference) (6 ohms 1 kHz,
THD 10%)
Models of area code AUS
Stereo mode (rated) (6 ohms 120 Hz – 20 kHz,
THD 0.09%)
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
2)
Surround mode (reference) (6 ohms 1 kHz,
THD 10%)
Models of area code AEP
Stereo mode (rated) (6 ohms, 1 kHz, THD 1%)
www
85 W + 85 W
.
Sony Corporation
9-887-648-03
Home Audio Division
2007G16-1
Published by Sony Techno Create Corporation
© 2007.07
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Surround mode
THD 10%)
70 W + 70 W
RMS output
1)
Measured under the following conditions:
FRONT: 100 W per
Area code
channel
CENTER: 100 W
SP, SP6
SURROUND: 100 W per
AUS
channel
AEP
2)
Reference power output for front, center and
surround speakers. Depending on the sound field
settings and the source, there may be no sound
50 W + 50 W
output.
Inputs
85 W + 85 W
Analog
Digital (Coaxial)
RMS output
Outputs (Analog)
FRONT: 122 W per
SUB WOOFER
channel
Tone
CENTER: 122 W
SURROUND: 122 W per
Gain levels
channel
Reproduction frequency range:
x ao
y
i
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STR-K785
8
SPECIFICATIONS
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2)
3 6 7 1 3
(reference) (6 ohms, 1 kHz,
RMS output
FRONT:122 W
per channel
CENTER:122 W
SURROUND:122 W
per channel
Power requirements
230 V AC, 50 Hz
240 V AC, 50 Hz
230 V AC, 50 Hz
Sensitivity: 800 mV/
50 kohms
Impedance: 75 ohms
Voltage: 2 V/1 kohm
±6 dB, 1 dB step
28 – 20,000 Hz
MULTI CHANNEL AV RECEIVER
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2 9 9 4 2 8
AEP Model
Australian Model
1 5 0 5 FM tuner section 8 2 9 9 4
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 9-kHz tuning scale:
531 - 1,602 kHz
Antenna Loop antenna
Intermediate Frequency
450 kHz
Video section
Inputs/Outputs
Video: 1 Vp-p, 75 ohms
COMPONENT VIDEO:
Y: 1 Vp-p, 75 ohms
P
B
75 ohms
P
R
75 ohms
80 MHz HD Pass Through
— Continued on next page —
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co
9 9
E Model
2 8 9 9
/C : 0.7 Vp-p,
B
/C : 0.7 Vp-p,
R