Sony STR-DE325, STR-DE225 Service Manual

STR-DE225/DE325

MICROFILM

SERVICE MANUAL

Photo : STR-DE225

Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY”, “PRO LOGIC” and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

SPECIFICA TIONS

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

Input

Sensitivity Impedance S/N

PHONO 50 74 dB (STR-DE325) 2.5mV kilohms 72 dB** (MM) (A, 2.5 mV)

CD,

5.1/DVD 200 mV INPUT*

TAPE/MD, TV/LD, VIDEO

Outputs TAPE/MD REC OUT:

VIDEO AUDIO OUT:

WOOFER/MIX AUDIO

PHONES: Accepts low and high

50 82 dB

kilohms 82 dB**

Voltage: 150 mV, Impedance: 10 kilohms

OUT: V oltage: 2V Impedance: 10 kilohms

impedance headphones

(Weighting network, input level)

**’78IHF

AEP Model

Canadian Model

STR-DE225/DE325

US Model

E Model

Australian Model

Chinese Model

STR-DE325

UK Model

STR-DE225

FM tuner section

Tuning range 87.5 – 108.0 MHz Aerial terminals 75 ohms, unbalanced Sensitivity Mono: 18.3 dBf, 2.2µV /75 ohms

Usable sensitivity 11.2 dBf, 1V /75 ohms (IHF) S/N Mono: 76 dB

Harmonic Mono: 0.3 % distortion at Stereo: 0.5 %

1 kHz Separation 45dB at 1 kHz

Frequency 30 Hz – 15kHz response

Selectivity 60 dB at 400 kHz

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

Stereo: 38.3 dBf, 22.5µV /75 ohms

Stereo: 70dB

+0.5

–2

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

FM STEREO/FM-AM RECEIVER

— Continued on next page —

STR-DE225/DE325

3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION —

— 9 — — 10 —

STR-DE225/DE325

3-5. SCHEMATIC DIAGRAM — POWER SECTION —

— 13 — — 14 —

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