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)
Summary of Contents for STR-DE425 - Fm Stereo/fm-am Receiver
Page 8: ...STR DE425 9 10 3 3 SCHEMATIC DIAGRAM DISPLAY SECTION ...
Page 10: ...STR DE425 13 14 3 5 SCHEMATIC DIAGRAM POWER SECTION ...
Page 13: ...STR DE425 19 20 3 8 SCHEMATIC DIAGRAM MAIN SECTION 1 3 ...
Page 14: ...STR DE425 21 22 3 9 SCHEMATIC DIAGRAM MAIN SECTION 2 3 ...
Page 15: ...STR DE425 23 24 3 10 SCHEMATIC DIAGRAM MAIN SECTION 3 3 ...
