Sony STR-W77 Service Manual

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SERVICE MANUAL

STR-W77 is RECEIVER section in
MHC-W77AV.
With 6 ohm loads, both channels driven, from 40–20, 000 Hz; rated 100 watts
per channel minimum RMS power, with no more than 0.9 % total harmonic
distortion from 250 milliwatts to rated output. (US model)
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L 13942296513
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Antenna
Antenna terminals
Intermediate frequency
AM tuner section
Tuning range
Antenna
Intermediate frequency
Amplifier section
Continuous RMS power output
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MICROFILM
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EXCEPT Tourist model :
87.5–108.0 MHz
Tourist model :
76.0–108.0 MHz
FM lead antenna
75 ohm, unbalanced
10.7 MHz
US, Canadian, E2, Argentine, Australian,
Thailand model :
AM : 530–1,710kHz (10kHz)
531–1,710kHz (9kHz)
E3, Saudi Arabia, Hong Kong, Singapore,
Malaysia, Tourist model :
MW : 531–1,602kHz (9kHz)
SW : 5.95–17.90MHz (9kHz)
AM loop antenna, External antenna terminals
450 kHz
US model :
(FRONT)
100 W + 100 W
(6 ohms at 40–20,000 Hz, 0.9% THD)
120 W + 120 W
(6 ohms at 1 kHz, 5% THD)
(CENTER)
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30 W (8 ohms at 1 kHz, 5% THD)
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STR-W77
2 9
8
SPECIFICATIONS
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3 6 7 1 3
Inputs
Outputs
FM STEREO/FM-AM RECEIVER
.
9 4 2 8
US Model
Canadian Model
Australian Model
Tourist Model
(REAR)
15 W + 15 W
(8 ohms at 1 kHz, 5% THD)
EXCEPT US model :
1 5 0 5 8 2 9 9 4
(FRONT)
120 W + 120 W
(6 ohms at 1 kHz, 5% THD)
(CENTER)
30 W (8 ohms at 1 kHz, 5% THD)
(REAR)
15 W + 15 W
(8 ohms at 1 kHz, 5% THD)
VIDEO/MD IN (phono jacks) :
voltage 250 mV/450 mV
impedance 47 kilohms
MIX MIC (phono jacks) :
sensitivity 1 mV/450 mV
impedance 10 kilohms
VIDEO/MD OUT (phono jacks) :
voltage 250 mV
impedance 1 kilohms
PHONES (stereo phono jacks) :
accepts headphones of 8 ohms or more
FRONT SPEAKER :
accepts impedance of 6 to 16 ohms
CENTER SPEAKER :
accepts impedance of 8 to 16 ohms
REAR SPEAKER :
accepts impedance of 8 to 16 ohms
SUPER WOOFER :
voltage 250 mV impedance 1 kilohms
– Continued on page 2 –
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9 9
E Model
2 8 9 9