Sony STR-DE425 Service Manual

SERVICE MANUAL
Manufactured under license from Dolby Laboratories
Licensing Corporation.
"DOLBY", "PRO LOGIC" and the double-D symbol are
trademarks of Dolby Laboratories Licensing Corporation.
Amplifier section
Power output
(DIN 1 kHz, 4 ohms)
Stereo mode
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
PHONO 2.5mV 50
(MM) kilohms
CD,
5.1/DVD 200 mV
INPUT*
50
TAPE/MD, kilohms
TV/LD, 150 mV
VIDEO
MICROFILM
SPECIFICATIONS
Outputs
Muting
BASS BOOST
TONE
FM tuner section
Tuning range
Aerial terminals
Sensitivity
(Weighting
Usable sensitivity 11.2 dBf, 1V /75 ohms (IHF)
network,
S/N
input level)
Harmonic
74 dB
distortion at
72 dB**
1 kHz
(A, 2.5 mV)
Separation
Frequency
response
82 dB Selectivity
82 dB**
(A, 150 mV)
**'78IHF
STR-DE425
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
Full mute
+10dB at 70 Hz
±8dB at 100 Hz and 10 kHz
87.5 – 108.0 MHz
75 ohms, unbalanced
Mono: 18.3 dBf, 2.2µV /75 ohms
Stereo: 38.3 dBf, 22.5µV /75 ohms
Mono: 76 dB
Stereo: 70dB
Mono: 0.3 %
Stereo: 0.5 %
45dB at 1 kHz
+0.5
30 Hz – 15kHz dB
–2
60 dB at 400 kHz
FM STEREO/FM-AM RECEIVER
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
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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