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Sony STR-DE425 Service Manual

Sony STR-DE425
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STR-DE425
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY”, “PRO LOGIC” and the double-D symbol are
trademarks of Dolby Laboratories Licensing Corporation.
MICROFILM
SPECIFICATIONS
Amplifier section
Power output
Stereo mode
(DIN 1 kHz, 4 ohms)
90 W + 90 W
Surround (DIN 1 kHz, 4 ohms)
mode Front: 90W/ch
Centre: 90W
(only in PRO LOG IC MODE)
REAR: (DIN 1 kHZ, 8ohms) 45 W/ch
5.1/DVD Front: 90 W/ch
INPUT * mode (DIN 1 kHz, 4 ohms)
Centre: 90 W (DIN 1 kHz, 4 ohms)
Rear: 45 W/ch (DIN 1 kHz, 8 ohms)
Frequency PHONO: RIAA
response equalization curve ±0.5 dB
TV / LD, CD, TAPE / MD,
VIDEO, 5.1/DVD INPUT:
10Hz - 50kHz ±1dB
Input
Sensitivity Impedance S/N
(Weighting
network,
input level)
PHONO 2.5mV 50 74 dB
(MM) kilohms 72 dB**
(A, 2.5 mV)
CD,
5.1/DVD 200 mV
INPUT*
50 82 dB
TAPE/MD, kilohms 82 dB**
TV/LD, 150 mV (A, 150 mV)
VIDEO
**’78IHF
Outputs TAPE/MD REC OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
WOOFER/MIX AUDIO
OUT: Voltage: 2V
Impedance: 10 kilohms
PHONES: Accepts low and high
impedance headphones
Muting Full mute
BASS BOOST +10dB at 70 Hz
TONE ±8dB at 100 Hz and 10 kHz
FM tuner section
Tuning range 87.5 – 108.0 MHz
Aerial terminals 75 ohms, unbalanced
Sensitivity Mono: 18.3 dBf, 2.2µV /75 ohms
Stereo: 38.3 dBf, 22.5µV /75 ohms
Usable sensitivity 11.2 dBf, 1V /75 ohms (IHF)
S/N Mono: 76 dB
Stereo: 70dB
Harmonic Mono: 0.3 %
distortion at Stereo: 0.5 %
1 kHz
Separation 45dB at 1 kHz
Frequency 30 Hz – 15kHz
+0.5
dB
response
Selectivity 60 dB at 400 kHz
–2
— Continued on next page —
AM tuner section
Tuning range 531 – 1602 kHz
Aerial Loop aerial
Usable sensitivity 50 dB/m (at 999 kHz)
S/N 54 dB(at 50 mV/m)
Harmonic 0.5%(50 mV/m, 400Hz)
distortion
Selectivity 35 dB
Video section
Input VIDEO 1, 2, TV:
1 Vp-p 75 ohms
Output VIDEO 1, 2, MONITOR:
1 Vp-p 75 ohms
General
System Tuner section; PLL
quartz-locked digital
synthesizer system
Preamplifier section:
Low-noise NF type
epualizer
Power amplifier section:
Pure-complimentary
SEPP
Power 230 V AC, 50/60 Hz
requirements
Power 230 W
consumption
AC outlets Switched 100 W
(except for the U.K.
model)

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Sony STR-DE425 Specifications

General IconGeneral
Frequency Response10 Hz - 100 kHz
Weight8.5 kg
Tuning rangeFM
Speaker load impedance8Ω to 16Ω
Video ConnectionsComposite video
Dimensions430 x 145 x 295mm
Speaker Impedance4 - 16 ohms

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