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STR-DE225/DE325
SERVICE MANUAL
AEP Model Canadian Model
STR-DE225/DE325
US Model E Model Australian Model Chinese Model
STR-DE325
Photo : STR-DE225
UK Model
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.
SPECIFICATIONS
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 INPUT * mode Front: 90 W/ch (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) PHONO: RIAA(except STR-DE225) 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 (STR-DE325) (MM) CD, 5.1/DVD INPUT* TAPE/MD, TV/LD, VIDEO Outputs 50 2.5mV kilohms 74 dB 72 dB** (A, 2.5 mV)
FM tuner section
87.5 108.0 MHz 75 ohms, unbalanced 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 Frequency response Selectivity **'78IHF 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 45dB at 1 kHz +0.5 30 Hz 15kHz 2 dB 60 dB at 400 kHz Tuning range Aerial terminals Sensitivity
200 mV 50 kilohms 82 dB 82 dB**
AM tuner section
Tuning range Aerial Usable sensitivity S/N Harmonic distortion Selectivity 531 1602 kHz Loop aerial 50 dB/m (at 999 kHz) 54 dB(at 50 mV/m) 0.5%(50 mV/m, 400Hz) 35 dB
Frequency response
Muting BASS BOOST TONE
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FM STEREO/FM-AM RECEIVER
MICROFILM
STR-DE225/DE325
3-3. SCHEMATIC DIAGRAM -- DISPLAY SECTION --
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STR-DE225/DE325
3-5. SCHEMATIC DIAGRAM -- POWER SECTION --
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STR-DE225/DE325
3-8. SCHEMATIC DIAGRAM -- MAIN SECTION (1/3) --
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STR-DE225/DE325
3-9. SCHEMATIC DIAGRAM -- MAIN SECTION (2/3) --
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-- 22 --
STR-DE225/DE325
3-10. SCHEMATIC DIAGRAM -- MAIN SECTION (3/3) --
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3-12. IC BLOCK DIAGRAMS
· IC BLOCK DIAGRAMS IC1 BU1922
TSTLD 9 8 SCOUT OSCO RDCL VDDD TEST 10 ANTIALIASING FILTER CLOCKED COMPARATOR VP1 REFERENCE VOLTAGE 7 CIN OSCI VSSD 11 TS7 15
16
14
13
12
TEST LOGIC AND OUTPUT SELECTOR SWITCH QUALITY BIT GENERATOR OSCILLATOR AND DIVIDER 57kHz BANDPASS (8th ORDER)
RECONSTRUCTION FILTER
DEFFERENTIAL DECODER
BIPHASE SYMBOL DECODER
CONTAS LOOP VARIABLE AND FIXED DIVIDER
CLOCK REGENERATION AND SYNC
1 QUAL
2 RDDA
3 Vref
4 MUX
5 VDDA
6 VSSA
IC701
uPC2581V
BIAS CIRCUIT
PROTECTOR REG DRIVE PRE DRIVE 4 COMP1 5 MF1 6 IN1 7 GND PRE DRIVE 8 IN2 9 NF2 10 COMP2 DRIVE
1 MUTE
2 + VOUT1
3 VOUT1
11 VOUT2
12 + VOUT2
13 14 15 VCC1 VCC2 VEE
IC401, IC500
LC7822
1 IN 2 3 OUT 4 5 IN 6 7 OUT 8 9 IN 10 OUT VEE 11 12 LEVEL SHIFT
30 29 IN 28 27 OUT 26 25 IN 24 23 OUT 22 IN 21 20 OUT 19 VDD
DI
CONTROL
CE 13 14
LATCH
18 RESET 17 S
CL 15
SHIFT RESISTOR
16 VSS
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IC202
BA6208
SWITCH
MOTOR DRIVE
SWITCH
MOTOR DRIVE REG
1 NC
2 INPUT 1
3 INPUT 2
4 NC
5 GND
6 Vcc
7 OUTPUT 2
8 OUTPUT1
9 NC
IC950
NJM2103D
CR
1
8
RESET
VSC 2 + VREF
+ 7 VSA
OUTC
3
6
VSB/SESIN
GND
4 Q R S + +
5
V+
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