Sony STRSE-381 Service manual

STR-SE381

SERVICE MANUAL

Manufactured under license from Dolby Laboratories
Licensing Corporation.
“Dolby” “Pro Logic” and the double-D symbol a are
trademarks of Dolby Laboratories Licensing
Corporation.

SPECIFICATIONS

Audio power specifications
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
With 8-ohm load, both channels driven, from 40 - 20,000 Hz,

rated 60 watts per channel minimum RMS power, with no more
than 0.5% total harmonic distortion from 250 milliwatts to
rated output.

Amplifier section

Stereo mode (8 ohms at 40 Hz - 20 kHz less than 0.5% total

Surround mode (8 ohms at 1 kHz, THD 0.5%)

Frequency response PHONO: RIAA

Inputs

Sensitivity Impedance

PHONO
(MM)

CD 400 mV
TAPE/MD, 250 mV
TV/DBS, 50 Kilohms 82 dB*
VIDEO (A, 150 mV)

2.5 mV 50 Kilohms 72 dB*

harmonic distortion)
60 W + 60 W

Front: 60 W/ch
Center: (Pro Logic Mode)
60 W
Rear: 60 W/ch

equalization curve ±0.5 dB
TV/DBS, CD, TAPE/MD, VIDEO INPUT
10 Hz - 50 kHz ±1 dB

S/N (weighting network,

input level)

(A, 2.5 mV)

*78 IHF

US Model

Outputs TAPE/MD REC OUT:

Muting Full mute
BASS BOOST +10 dB at 70 Hz
TONE ±8 dB at 100 Hz and 10 kHz

FM tuner section

Tuning range 87.5 - 108.0 MHz
Antenna terminals 75 ohms, unbalanced

Sensitivity Mono: 18.3 dBf, 4.5 µV
Usable sensitivity 11.2 dBf, 2 µV (IHF)

S/N Mono: 76 dB
Harmonic distortion at 1 kHz

Separation 45 dB at 1 kHz
Frequency response 30 Hz - 15 kHz–2 dB
Selectivity 60 dB at 400 kHz

AM tuner section

Tuning range 531 - 1710 kHz
Antenna Loop antenna
Usable sensitivity 50 dB/m (at 1,000 kHz)
S/N 54 dB (at 50 mV/m)
Harmonic distortion 0.5% (50 mV/m, 400 kHz)
Selectivity At 10 kHz: 40 dB

Voltage: 150 mV,
Impedance: 10 kilohms

VIDEO AUDIO OUT:

Voltage: 150 mV,
Impedance: 10 kilohms

PHONES:

Accepts low and high impedance headphones

300 ohms, balanced
Stereo: 38.3 dBf, 45 µV

Stereo: 70 dB

Mono: 0.3%
Stereo: 0.59%

+0.5

— Continued on next page —

MICROFILM

FM STEREO/FM-AM RECEIVER

STR-SE381

3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION —

• See page 6 for Waveforms. • See page 25 for IC Pin Functions. • See page 27 for IC Block Diagrams.

— 9 — — 10 —

STR-SE381

3-5. SCHEMATIC DIAGRAM — VOLUME SECTION —

• See page 7 for KEY Board Wiring Board.

— 13 — — 14 —