Sony Str-De725 电路图.pdf

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1、STR-DE725 US ModelSERVICE MANUAL MICROFILM Continued on next page SPECIFICATIONS Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” the double-D symbol a “AC-3” and “PRO LOGIC” are trademarks of Dolby Laboratories Licensing Corporation. FM STEREO FM-AM RECORDER AUDIO P

2、OWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 8 ohm loads, both channels driven, from 20 - 20,000 Hz; rated 100 watts per channel minimum RMS power, with no more than 0.09% total harmonic distortion from 250 milliwatts to rated output . Amplifier section POWER OUTPUT Stereo mo

3、de(8 ohms 20 Hz 20 kHz, THD 0.09%) 100 W + 100 W Surround mode(8 ohms at 1 kHz, THD 0.8%) Front: 100 W/ch Centera): 100 W Reara): 100 W/ch a)Depending on the sound field settings and the source, there may be no sound output. Dynamic power output 155 W + 155 W, 8 ohms 220 W + 220 W, 4 ohms Harmonic d

4、istortion at rated output Less than 0.09% (with sound field, tone, and bass booster bypassed) Frequency response PHONO: RIAA equalization curve 0.5 dB CD, TAPE, MD/DAT, TAPE/MD, DVD/LD, TV/DBS, VIDEO 1 and VIDEO 2 : 10 Hz - 50 kHz +0.5/2 dB (with sound field, tone, and bass booster bypassed) Inputs

5、(Analog)PHONO: Sensitivity: 2.5 mV Impedance: 50 kilohms S/Nb): 75 dB (A, 2.5 mVc) CD, DVD/LD, TAPE, MD/DAT, TAPE/MD, TV/DBS, VIDEO 1 and VIDEO 2 : Sensitivity: 150 mV Impedance: 50 kilohms S/Nb): 82 dB (A, 150 mVc) b)78 IHF c)Weighted network, input level Inputs (Digital)DVD/LD: Sensitivity: Impeda

6、nce: S/N: 100 dB (A, 20 kHz LPF) OutputsTAPE/MD, (REC OUT); VIDEO 1, 2 (AUDIO OUT): Voltage: 150 mV Impedance: 10 kilohms WOOFER: Voltage: 2 V Impedance: 1 kilohms PHONES: Accepts low - and high-impedance headphones BASS BOOST+6 dB at 70 Hz RadioFans.CN 收音机爱 好者资料库 2 Sampling Frequency 48 kHz EQBASS:

7、 100 Hz 1.0 kHz (21 steps) MID: 500 Hz 5.0 kHz (21 steps) TREBLE: 1.0 kHz 10 kHz (21 steps) Gain levels: 10 dB, 1 dB step FM tuner section Tuning range87.5 - 108.0 MHz Antenna terminals 75 ohms, unbalanced SensitivityMono: 18.3 dBf, 4.5 V Stereo: 38.3 dBf, 45 V Usable sensitivity 11.2 dBf, 2 V (IHF)

8、 S/NMono: 76 dB Stereo: 70 dB Harmonic distortion at 1 kHz Mono: 0.3 % Stereo: 0.5 % Separation45 dB at 1 kHz Frequency response 30 Hz - 15 kHz +0.5/-2 dB Selectivity60 dB at 400 kHz AM tuner section Tuning rangeWith 10-kHz tuning scale: 530 - 1710 kHzd) With 9-kHz tuning scale: 531 - 1710 kHzd) Ant

9、ennaLoop antenna Usable sensitivity 50 dB/m (at 1,000 kHz or 999 kHz) S/N54 dB (at 50 mV/m) Harmonic distortion 0.5% (50 mV/m, 400 kHz) SelectivityAt 9 kHz: 35 dB At 10 kHz: 40 dB d)You can change the AM tuning scale to 9 kHz. After tuning in any AM station, turn off the receiver. Hold down the TUNI

10、NG + button and press the 1/u button. All preset stations will be erased when you change the tuning scale. To reset the scale to 10 kHz, repeat the procedure. Video section Input1 Vp-p 75 ohms Outputs1 Vp-p 75 ohms General SystemTuner section: PLL quartz-locked digital synthesizer system Preamplifie

11、r section: Low- noise NF type equalizer Power amplifier section: Pure-complementary SEPP Power requirements 120 V AC, 60 Hz Power consumption 290 W AC outlets2 switched, total 100 W Dimensions430 355 157.5 mm (17 14 61/4 in.) including projecting parts and controls Mass (Approx.)10.5 kg (23 lb 3 oz)

12、 Supplied accessories FM wire antenna (1) AM loop antenna (1) Remote commander RM-PP401 (remote) (1) Carbon-ZINC dry batteries (2) Design and specifications are subject to change without notice. RadioFans.CN 收音机爱 好者资料库 3 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LIN

13、E WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. TABLE OF CONTENTS After correcting the original service problem, perform the f

14、ollowing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth ground and from all ex

15、posed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods. 1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these ins

16、truments. 2.A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage

17、scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT To Exposed Metal Parts on Set 0.15F1.5k AC voltmeter (0.75V) Earth Ground Fig. A. Using an AC

18、voltmeter to check AC leakage. 1.GENERAL 4 2.TEST MODE6 3.DIAGRAMS 3-1.Circuit Boards Location 7 3-2.Block Diagram Main Section 9 3-3.Block Diagram Power Section 11 3-4.Printed Wiring Board AMP Section 13 3-5.Schematic Diagram AMP Section 15 3-6.Printed Wiring Board Video Section 17 3-7.Schematic Di

19、agram Video Section 19 3-8.Printed Wiring Board AUDIO Section 21 3-9.Schematic Diagram AUDIO Section 23 3-10. Printed Wiring Board Input Section 25 3-11. Schematic Diagram Input Section 27 3-12. Printed Wiring Board Display Section 29 3-13. Schematic Diagram Display Section 31 3-14. Printed Wiring B

20、oard SPEAKER Section 33 3-15. Schematic Diagram SPEAKER Section 35 3-16. Printed Wiring Board Power Section 37 3-17. Schematic Diagram Power Section 39 3-18. Printed Wiring Board DIGITAL (SIDE A) Section 41 3-19. Printed Wiring Board DIGITAL (SIDE B) Section 43 3-20. Schematic Diagram DIGITAL Sectio

21、n (1/3) 45 3-21. Schematic Diagram DIGITAL Section (2/3) 47 3-22. Schematic Diagram DIGITAL Section (3/3) 49 3-23. IC Pin Function Description 51 3-24. IC Block Diagrams61 4.EXPLODED VIEWS 4-1.Front Panel Section 64 4-2.Chassis Section 65 5.ELECTRICAL PARTS LIST66 RadioFans.CN 收音机爱 好者资料库 4 SECTION 1

22、 GENERAL LOCATION AND FUNCTION OF CONTROLS FRONT PANEL 11/u (POWER) button 2MULTI CURSOR CONTROL 3SURROUND, EQUALIZER, INDEX indicators 4DIRECT TUNING button 5VIDEO 1 button 6MULTI CHANNEL DECODING indicator 7TV/DBS button 8SOUND FIELD GENRE button 9SOUND FIELD MODE button 0SOUND FIELD, EQ, BASS BOO

23、ST indicators !MASTER VOLUME control !BALANCE control !MUTING button !SOUND FIELD ON/OFF button !BASS BOOST button !EQ ON/OFF button !INPUT MODE button !PHONO button !DVD/LD TUNER button CD button VIDEO 2 button TAPE/MD button Numeric buttons SHIFT button DISPLAY button MEMORY button FM/AM button FM

24、 MODE button #SLEEP button #PHONES jack #TUNING +, buttons #SPEAKERS A, B switche #PRESET TUNING +, buttons #SET UP button #CURSOR MODE button 1234567890! ! ! ! ! ! ! ? # # # # # # # 5 REAR PANEL 1DIGITAL 2ANTENNA (FM/AM) 3TV/LD 4DVD/LD 5VIDEO 2 6VIDEO 1 7MONITOR 8S-LINK 9WOOFER 0SPEAKERS (REAR) !SP

25、EAKER (CENTER) !WIRELESS REAR SPEAKER !IMPEDANCE SELECTOR !AC power cord !AC OUTLET !FRONT SPEAKERS (A/B) !SPEAKERS (FRONT) !CD !PHONO y SIGNAL GND 123 4567890! ! ! ! 6 SECTION 2 TEST MODE FLUORESCENT INDICATOR TUBE TEST MODE * All fluorescent segments are tested. When this test is activated, all se

26、gments turn on at the same time, then each segment turns on one after another. * Procedure: While depressing the SET UP and the SOUND FIELD MODE buttons simultaneously, press the power 1/u button to turn on the main power. All segments turn on at the same time, then each segment turns on one after a

27、nother. FACTORY SET MODE * All preset contents are reset to the default setting. * Procedure: While depressing the SET UP and the SOUND FIELD ON/OFF buttons simultaneously, press the power 1/u button to turn on the main power. The message FACTORY SET appears and the present contents are reset to the

28、 default values. ALL CLEAR MODE * All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair. * Procedure: While depressing the DISPLAY and the SOUND FIELD ON/ OFF buttons simultaneously, press the power 1/u button to

29、turn on the main power. The machine enters the DEMO mode.DEMO mode: Wait a while, then the demonstration starts. If the power 1/u button is pressed often the demonstration has started, the power is turned off, and the demonstration resumes if the power 1/u button is pressed again. ALL CLEAR mode; If

30、 the power 1/u button is pressed often the machine enters the DEMO mode, but before the demonstration starts, the display is turned off. Press 1/u again. No response is returned. Then press 1/u again. The preset data is cleared and the machine enters the normal power-on state. SOUND FIELD CLEAR MODE

31、 * The preset sound field is cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair. * Procedure: While depressing the SOUND FIELD ON/OFF button, press the power 1/u button to turn on the main power. The message SURR CLEAR! appears and in

32、itialization is performed. AM CHANNEL STEP 9 kHz/10 kHz SELECTION MODE * Either the 9 kHz step or 10 kHz step can be selected for the AM channel step. * Procedure: Set the FUNCTION to AM. Turn off the main power. While depressing the TUNING+ button or the PRESET TUNING + button, press the power 1/u

33、button to turn on the main power. Either the message AM 9kHz STEP or AM 10kHz STEP appears. Select the desired step. DSP TEST MODE * Procedure: While depressing the SET UP and the SOUND FIELD GENRE buttons simultaneously, press the power 1/u button to turn on the main power. The message DSP NO ERROR

34、 or DSP ERROR. STR-DE725 7 8 SECTION 3 DIAGRAMS 3-1. CIRCUIT BOARDS LOCATION For schematic diagrams. Note: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified.

35、%: indicates tolerance. 2 : nonflammable resistor. 1 : fusible resistor. C : panel designation. U : B+ Line. V : B Line. H : adjustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. No mark : FM Voltages are taken with a VOM (Input impedance 1

36、0 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Circled numbers refer to waveforms. Signal path. F: FM J: CD c: DIGITAL I : PHONO THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this necessary n

37、ote is printed in each block.) Waveform 1 IC1201 ( (XO) 2 IC1101 (X OUT) 3 IC1101 (CLK OUT) 4 IC102 * (XO) 4.0Vp-p 5.5Vp-p 5.4Vp-p 3.0Vp-p 4MHz 24.576MHz 12.288MHz 4.0MHz For printed wiring boards. Note: X : parts extracted from the component side. : Through hole. b : Pattern from the side which ena

38、bles seeing. The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. SW board H.P board SP SW board DISPLAY board BALANCE board SP board REAR AMP board AC board AMPLIFIER board VIDEO board TUNER board D.IN/OUT board DIGITAL boa

39、rd AUDIO board INPUT board JOINT board VOLUME board L.B board REG board LED board STR-DE725 9 10 3-2. BLOCK DIAGRAM MAIN SECTION L 60 DATA FM AM FM 75 AM DO TUNED TMUTE STEREO DATA CLK CE L OUT R OUT TUNER UNIT DO TUNED TMUTE STEREO S DATA S CLK S LAT R CHR CH : FM : CD Signal Path RCH is omitted PH

40、ONO LCD J301 LINPUT LOUTPUT J302 MD/DAT M OUT1 J201 MONITOR J202 J203 VIDEO 2 VIDEO 1 V1 IN13 V1 OUT15 V2 IN9 V2 OUT11 TV3 LD5 8VEE 16VCC 14SW1 10SW2 4SW3 6SW4 32 VIDEO SELECT IC201 -5V REG IC202 -15V +5V 3 2 1 7 5 10 4 8 11 CONTROL CE 13 CLK 15 DI 14 AUDIO SELECT IC301 MUTE Q302 S LAT S CLK S DATA

41、31 EQ AMP IC302 MUTE Q304 IC407 MUTE Q354 RY301 RELAY DRIVE Q301 IC408 RV401 VOLUME RV402 BALANCE L C W SL M UP DOWN V-A81 SYSTEM CONTROL IC1201 V-B82 V-E83 V INH80 61 AUTO STOP 62 STEREO 97 TUNER MUTE S DATA S CLK S LAT DO TUNED STEREO TMUTE 57 DATA 58 CLOCK 56 LATCH D : PHONO J299 VIDEO LAUDIO VID

42、EO 3 V3 IN7 1 2 7 9 4 11 CONTROL CE 13 CLK 15 DI 14 SELECTOR IC303 S LAT S CLK S DATA 6 8 L TAPE INPUT LOUTPUT J303 LTV/DBS L J305 VIDEO2 INPUT INPUT LOUTPUT L VIDEO1 OUTPUT LINPUT J304 TM301 ANTENNA 4 14 15 13231 10 12 6 9 LINPUT DVD/LD 10 IR LINK DET IC001 DVD/LD INPUT OUTPUT INPUT INPUT OUTPUT OU

43、TPUT DVD/LD TV/DBS INPUT 15 12 3 2 1 SELECT SWITCH IC1005 5 B C A11 10 9 B C A IC1006 76 SWDT 111 A 110 B 109 C A B C 78 SCLK 77 XLAT 2 RESET 75 SRDT DIGITAL AUDIO I/F RECEIVER IC1101 D IN47 RESET11 SWDT40 SCLK42 XLAT41 XO27 XI26 X1101 24.576MHz 35D OUT 29CLK 34BCK 36LRCK 30ERROR 38SRDT X1301 49.152

44、MHz IC1102 IC1102 IC1305IC1305 IC1305 1310 CLOCK DIVIDE IC1403 IC1305 IC1102 IC1108 MEMORY IC1302 A0-7 D0-7 LATCH IC1303 IC1304 A8-15 D0-7 EMRD5 EXTMEM21 CLK30 SDATA122 SDATA227 MCLK44 SCK43 SCLK125 SCLK228 RCLK42 LRCLK126 LRCLK229 DOLBY DIGITAL AUDIO DECODER IC1301 41AUDATA0 40AUDATA1 39AUDATA2 D0-

45、7 SCCLK 7 16 SCCLK SCD IN 6 CS 18 RESET 36 15 SCDOUT 17 CS 20 RESET 20INTREQ 19SCDOUT 19 INTREQ 18 SCDIN Q1204 Q1205 IC1202 67 D1201 14 ANALOG/DIG ERROR A0-7 D0-7 SRAM IC1402 SIA117 SIB118 SIC119 XWE74 XOE70 25 32 16 20 23 25 . HD0 HD7 D0-7 AD0AD7 21 XHDWR 35 HA0 AUDIO DSP IC1401 HA015 XHDWR 9 XHDRD

46、 10 XHDCS 14 XRST 26 22 XHDRD 24 XHDCS 23 HRDY 36 XRST 13HRDY 5SOD 37 SOD 6 CDTO IC1202 IC1202 Q1206 Q1207 5 CDTI 4 CCLK 3 CS 7 PD 108 RY DIRECT PASS 2SOA CLK199 LRCK115 BCK0113 3SOB 4SOC 27L OUT1 LIN-29 AUDIO CODEC IC1103 CDTO 44 CDTI 43 CCLK 42 CS 41 PD 17 SDTO9 MCLK139 BCLK4 LRCK5 SDTI 16 SDTI 27

47、 SDTI 38 LIN+30 IC304IC1104IC1104 23L OUT3 IN14 DATA9 CLK8 LAT10 15OUT DATA CLK LAT IC414 IN3 DATA9 CLK8 LAT10 2OUT DATA CLK LAT IN1415OUT IC407 IC410 IC410 IN14 DATA9 CLK8 LAT10 15OUT DATA CLK LAT IC406 MUTE Q303 IC409 IC405 24R OUT3 25L OUT2 IC1104 IC1105 IC1105 IC1106 VOL CONT IC416 VOL CONT IC41

48、5 VOL CONT LED DRIVE Q120 LED VOL MUTE CONT Q1201 85 FUN MUTE Q1202 Q1203 U DATA52DISP DATA 55DISP CLK 51DISP MR 53SREQ 10SOTO 9SINO 87MD2 89MD0 90RESET U CLOCK U MREQ U SREQ SOTO SINO MD2 MD0 U REST B A 107RY POWERRY POWER 48 EV STB 50 EV CLK 49 EV DATA LAT CLK DATA 84 AC MUTE 79 PROTETOR 106 RY HP

49、 101 RY FRONT A 102 RY FRONT B 103 RY CENTER 105 RY WOOFER 104 RY REAR AC MUTE PROTECTOR RY HP RY FRONT A RY FRONT B RY CENTER RY WOOFER RY REAR C 92 XO 93 XI X1201 4MHz 64STOPSTOP : DIGITAL 16 STR-DE725 11 12 3-3. BLOCK DIAGRAM POWER SECTION RELAY DRIVE Q601 LIMITER Q504 14 5 15 6 1 2 3 VEE VCC IN MUT +VE NF -VE 13VCC POWER AMP(L) IC501 L +B -B LIMITER Q505 BOOSTER Q506 BOOSTER Q507 CUR DET Q508 PROTECTOR Q509,510 Q511 LIMITER Q604 9 15 12 11 VEE IN +VE NF -VE