Sony STR-W77 Service Manual

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)
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range EXCEPT Tourist model :
87.5–108.0 MHz
Tourist model :
76.0–108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm, unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range US, Canadian, E2, Argentine, Australian,
Thailand model :
AM : 530–1,710kHz (10kHz)
E3, Saudi Arabia, Hong Kong, Singapore,
Malaysia, Tourist model :
MW : 531–1,602kHz (9kHz)
SW : 5.95–17.90MHz (9kHz)
Antenna AM loop antenna, External antenna terminals
Intermediate frequency 450 kHz
Amplifier section
Continuous RMS power output
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)
30 W (8 ohms at 1 kHz, 5% THD)
MICROFILM
SPECIFICATIONS
531–1,710kHz (9kHz)
STR-W77
Australian Model
(REAR)
15 W + 15 W
(8 ohms at 1 kHz, 5% THD)
EXCEPT US model :
(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)
Inputs 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
Outputs 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
FM STEREO/FM-AM RECEIVER
US Model
Canadian Model
E Model
Tourist Model
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