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Service Manual
STR-DE225/DE325
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
Stereo mode
(DIN 1 kHz, 4 ohms)
STR-DE325: 90 W + 90 W
STR-DE225: 40 W + 40 W
Surround
(DIN 1 kHz, 4 ohms)
mode
Front: STR-DE325: 90W/ch
STR-DE225: 40W/ch
Centre: STR-DE325: 90W
STR-DE225: 40W
(only in PRO LOG IC MODE)
REAR: STR-DE325:
(DIN 1 kHz, 4ohms) 90 W
STR-DE225: (DIN 1 kHz,
4ohms) 40 W
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)
(except STR-DE225)
Frequency
PHONO: RIAA(except STR-DE225)
response
equalization curve ±0.5 dB
TV / LD, CD, TAPE / MD,
VIDEO, 5.1/DVD INPUT*:
10Hz - 50kHz ±1dB
MICROFILM
Photo : STR-DE225
SPECIFICATIONS
Input
Sensitivity Impedance S/N
PHONO
50
(STR-DE325)
2.5mV kilohms
(MM)
CD,
5.1/DVD
200 mV
INPUT*
50
kilohms
TAPE/MD,
TV/LD,
VIDEO
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 STEREO/FM-AM RECEIVER
Canadian Model
Australian Model
Chinese Model
FM tuner section
Tuning range
Aerial terminals
(Weighting
Sensitivity
network,
input level)
74 dB
Usable sensitivity 11.2 dBf, 1V /75 ohms (IHF)
72 dB**
S/N
(A, 2.5 mV)
Harmonic
distortion at
1 kHz
82 dB
Separation
82 dB**
Frequency
response
Selectivity
**'78IHF
AM tuner section
Tuning range
Aerial
Usable sensitivity 50 dB/m (at 999 kHz)
S/N
Harmonic
distortion
Selectivity
AEP Model
STR-DE225/DE325
US Model
E Model
STR-DE325
UK Model
STR-DE225
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
531 – 1602 kHz
Loop aerial
54 dB(at 50 mV/m)
0.5%(50 mV/m, 400Hz)
35 dB
— Continued on next page —
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Summary of Contents for Sony STR-DE225
- Page 1 (DIN 1 kHz, 4 ohms) (Weighting Sensitivity Mono: 18.3 dBf, 2.2µV /75 ohms STR-DE325: 90 W + 90 W network, Stereo: 38.3 dBf, 22.5µV /75 STR-DE225: 40 W + 40 W input level) ohms Surround (DIN 1 kHz, 4 ohms) PHONO 74 dB Usable sensitivity 11.2 dBf, 1V /75 ohms (IHF)
- Page 2 STR-DE225/DE325 3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION — — 9 — — 10 —...
- Page 3 STR-DE225/DE325 3-5. SCHEMATIC DIAGRAM — POWER SECTION — — 13 — — 14 —...
- Page 4 STR-DE225/DE325 3-8. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — — 19 — — 20 —...
- Page 5 STR-DE225/DE325 3-9. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — — 21 — — 22 —...
- Page 6 STR-DE225/DE325 3-10. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) — — 23 — — 24 —...
-
Page 7: Ic Block Diagrams
3-12. IC BLOCK DIAGRAMS • IC BLOCK DIAGRAMS BU1922 TEST LOGIC AND OUTPUT SELECTOR SWITCH 57kHz ANTI- OSCILLATOR QUALITY BIT RECONSTRUCTION BANDPASS ALIASING GENERATOR FILTER (8th ORDER) FILTER DIVIDER BIPHASE CONTAS LOOP DEFFERENTIAL CLOCKED SYMBOL VARIABLE AND DECODER COMPARATOR DECODER FIXED DIVIDER CLOCK REGENERATION AND SYNC... - Page 8 IC202 BA6208 MOTOR SWITCH DRIVE MOTOR SWITCH DRIVE IC950 NJM2103D RESET – + VREF + – OUTC VSB/SESIN – – — 28 —...