Sony STR-DE845 - DE945 SERVICE MANUAL 电路图.pdf

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1、SERVICE MANUAL FM STEREO/FM-AM RECEIVER US Model Canadian Model STR-DE845/DE945 E Model Australian Model Chinese Model PX Model STR-DE845 SPECIFICATIONS STR-DE845/DE945 Photo: STR-DE945 Manufactured under license from Dolby labora- tories. “Dolby”, “AC-3”, “Pro Logic” and the double- D symbol ; are

2、trademarks of Dolby Laborato- ries. Manufactured under license from Digital Theater Systems, Inc. US Pat. No. 5,451,942 and other worldwide patents issued and pending. “DTS” an d “DTS Digital Surround” are trademarks of Digi- tal Theater Systems, Inc. Continued on next page AUDIO POWER SPECIFICATION

3、S POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 8 ohm loads, both channels driven, from 20 - 20,000 Hz; rated 110 watts (STR-DE945) and 100 watts (STR-DE845) per channel minimum RMS power, with no more than 0.09 % total harmonic distortion from 250 milliwatts to rated output (USA model only). Amp

4、lifier section POWER OUTPUT Models of area code U, CA Rated Power Output at Stereo Mode (8 ohms 20 Hz 20 kHz, THD 0.09 %) STR-DE945:110 W + 110 W STR-DE845:100 W + 100 W Reference Power Output (8 ohms 1 kHz, THD 0.7 %) STR-DE945:FRONT:1) 110 W + 110 W CENTER1): 110 W REAR1): 110 W + 110 W STR-DE845:

5、FRONT1): 100 W + 100 W CENTER1): 100 W REAR1): 100 W + 100 W Models of other area code STR-DE845: Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7 %) 100 W + 100 W2) 90 W + 90 W3) Reference Power Output (8 ohms 1 kHz, THD 0.7 %) FRONT1): 100 W + 100 W CENTER1): 100 W REAR1): 100 W + 100 W (8

6、 ohms 20 Hz 20 kHz, THD 0.09 %) FRONT1): 95 W + 95 W CENTER1): 95 W REAR1): 95 W + 95 W (8 ohms 1 kHz, THD 10 %) FRONT1): 135 W + 135 W CENTER1): 135 W REAR1): 135 W + 135 W 1) Depending on the sound field settings and the source, there may be no sound output. 2) Measured under the following conditi

7、ons: Area codePower requirements AU, E240 V AC, 50 Hz CN, SP230 V AC, 50 Hz 3) Measured under the following conditions: Area codePower requirements CN220 V AC, 50 Hz Frequency response PHONO: RIAA equalization curve 0.5 dB CD, TAPE, MD/DAT, MD/TAPE, DVD/ LD, TV/SAT, VIDEO 1, 2, and VIDEO 3: 10 Hz 50

8、 kHz +0.5/2 dB (with sound field, equalizer, and bass boost bypassed) Inputs (Analog) PHONO: Sensitivity: 2.5 mV Impedance: 50 kilohms S/N4): 86 dB (A, 2.5 mV5) 5.1CH INPUT, CD, TAPE, MD/DAT, MD/TAPE, DVD/ LD, TV/SAT, VIDEO 1, 2, and VIDEO 3: Sensitivity: 150 mV Impedance: 50 kilohms S/N4): 96 dB (A

9、, 150 mV5) 4) INPUT SHORT 5) Weighted network, input level Inputs (Digital) DVD/LD IN(Coaxial): Sensitivity: Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF) DVD/LD IN, TV/SAT IN, MD/DAT IN (Optical): Sensitivity: Impedance: S/N: 100 dB (A, 20 kHz LPF) OutputsTAPE, MD/DAT, MD/ TAPE; VIDEO 1, 2 (AUDIO

10、OUT): Voltage: 150 mV, Impedance: 1 kilohms SUB WOOFER: Voltage: 2 V Impedance: 1 kilohms PHONES: Accepts low- and high-impedance headphones BASS BOOST+6 dB at 70 Hz Sampling Frequency 48 kHz EQBASS: 100 Hz1.0 kHz (21 steps) MID: 500 Hz5.0 kHz (21 steps) TREBLE: 1.0 kHz10 kHz (21 steps) Gain levels:

11、 10 dB, 1 dB step RadioFans.CN 收音机爱 好者资料库 2 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS AP- PEAR AS SHOWN IN TH

12、IS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PISES SONY DONT LES

13、NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPMENTS PUBLIS PAR SONY. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing Keep the temperature of the soldering i

14、ron around 270 C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. FM tuner section Tuning range 87.5 - 108.0 MHz Antenna terminals 75 ohms, unbalanced Sensitivi

15、tyMono: 18.3 dBf, 2.2 V/75 ohms Stereo: 38.3 dBf, 22.5 V/75 ohms Usable sensitivity 11.2 dBf, 1 V/75 ohms 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

16、Tuning range Models of area code U, CA With 10-kHz tuning scale: 530 1710 kHz6) With 9-kHz tuning scale: 531 1710 kHz6) Models of area code AU, CN, SP With 9-kHz tuning scale: 531 1602 kHz Models of area code E With 10-kHz tuning scale: 530 1610 kHz6) With 9-kHz tuning scale: 531 1602 kHz6) AntennaL

17、oop 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 6) You can change the AM tuning scale to 9 kHz y 10 kHz. After tuning in any AM station, turn off the receiver. Hold down th

18、e TUNING + button and press the ?/1 button. All preset stations will be erased when you change the tuning scale. To reset the scale to 10 kHz (or 9 kHz), repeat the procedure. Video section InputsVideo: 1 Vp-p 75 ohms S-video: Y: 1 Vp-p 75 ohms C: 0.286 Vp-p 75 ohms OutputsVideo: 1 Vp-p 75 ohms S-vi

19、deo: Y: 1 Vp-p 75 ohms C: 0.286 Vp-p 75 ohms AC outlets Models of area code U, CA 2 switched, total 120 W/1A Models of area code AU, SP 1 switched, total 100 W Models of area code E, CN 2 switched, total 100 W Dimensions 430 158 378 mm (17 61/4 15 in.) including projecting parts and controls Mass (A

20、pprox.) 10.3 kg (22 lb 12 oz) Supplied accessories FM wire antenna (1) AM loop antenna (1) LR6 (size-AA) alkaline batteries (3) Models of area code U, CA only Audio/video/control S connecting cord (1) Control S connecting cord (1) STR-DE945 only Remote commander RM-LJ304 (remote) (1) STR-DE845 only

21、Remote commander RM-LP204 (remote) (1) Design and specifications are subject to change without notice. General SystemTuner section: PLL quartz-locked digital synthesizer system Preamplifier section: Low-noise NF type equalizer Power amplifier section: Pure-complementary SEPP Power requirements Model

22、s of area code U, CA 120 V AC, 60 Hz Models of area code CN, SP 220 230 V AC, 50/60 Hz Models of area code AU 240 V AC, 50 Hz Models of area code E 120/220/240 V AC, 50/60 Hz Power consumption Models of area code U STR-DE945: 290 W STR-DE845: 280 W Models of area code CA STR-DE945: 345 VA STR-DE845:

23、 335 VA Models of area code CN, SP STR-DE845: 220 W Models of area code AU STR-DE845: 230 W Models of area code E STR-DE845: 320 W Abbreviation AU : Australian model CA : Canadian model CN : Chinese model MY: Malaysia model SP : Singapore model U: US model RadioFans.CN 收音机爱 好者资料库 3 MODEL IDENTIFICAT

24、ION Rear View Part No. Fig. A.Using an AC voltmeter to check AC leakage. 1.5 k0.15 F AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer: Check t

25、he antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chas

26、sis, must not exceed 0.5 mA (500 microamperes.). 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 instruments. 2.A battery-operated AC milliammeter. The Data Precisio

27、n 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 scale. The Simpson 250 and Sanwa SH-63Trd are examples of a pas-

28、sive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) TABLE OF CONTENTS 1.GENERAL.4 2.DISASSEMBLY.6 3.TEST MODE.9 4.DIAGRAMS 4-1.Block Diagram MAIN Section (1/2) . 11 4-2.Block Diagram MAIN Section (2/2) . 12 4-3.Block Diagram

29、DISPLAY/POWER SUPPLY Section . 13 4-4.Note for Printed Wiring Boards and Schematic Diagrams . 14 4-5.Schematic Diagram DIGITAL Board (1/3) . 15 4-6.Schematic Diagram DIGITAL Board (2/3) . 16 4-7.Schematic Diagram DIGITAL Board (3/3) . 17 4-8.Printed Wiring Board DIGITAL Board (Component Side) . 18 4

30、-9.Printed Wiring Board DIGITAL Board (Conductor Side) . 19 4-10. Printed Wiring Boards VIDEO/JOINT (1) (H) Boards (DE845) . 20 4-11. Schematic Diagram VIDEO/JOINT (1) (H) Boards (DE845) . 21 4-12. Printed Wiring Boards OSD/OSD JOINT (H) Boards (DE945) . 22 4-13. Schematic Diagram OSD/OSD JOINT (H)

31、Boards (DE945) . 23 4-14. Printed Wiring Board AU SW Board . 24 4-15. Schematic Diagram AU SW Board . 25 4-16. Printed Wiring Board S-VIDEO Board . 26 4-17. Schematic Diagram S-VIDEO Board . 27 4-18. Printed Wiring Board DISPLAY Board . 28 4-19. Schematic Diagram DISPLAY Board . 29 4-20. Printed Wir

32、ing Board MAIN Board . 30 4-21. Schematic Diagram MAIN Board (1/3) . 31 4-22. Schematic Diagram MAIN Board (2/3) . 32 4-23. Schematic Diagram MAIN Board (3/3) . 33 4-24. Printed Wiring Boards H.P/MUTING/POWER/ ROTARY/VIDEO 3(DE945)/VOL/ V. SWITCH (E) Boards . 34 4-25. Schematic Diagram H.P/MUTING/PO

33、WER/ ROTARY/VIDEO 3(DE945)/VOL/ V. SWITCH (E) Boards . 35 4-26. Printed Wiring Boards BIAS (C)/BIAS (L) /BIAS (R)/BIAS (LS)/BIAS (RS)/5.1 IN Boards . 36 4-27. Schematic Diagram BIAS (C)/BIAS (L) /BIAS (R)/BIAS (LS)/BIAS (RS)/5.1 IN Boards . 37 4-28. Printed Wiring Boards DC (1)/DC (2) Boards . 38 4-

34、29. Schematic Diagram DC (1)/DC (2) Boards . 39 4-30. Printed Wiring Boards AC/SP Boards . 40 4-31. Schematic Diagram AC/SP Boards . 41 4-32. IC Pin Function Description . 46 5.EXPLODED VIEWS. 56 6.ELECTRICAL PARTS LIST. 59 Model DE945:US model DE945:Canadian model DE845:US model DE845:Canadian mode

35、l Malaysia and Singapore models Chinese model Australian model E and PX models Part No. 4-226-871-0s 4-226-871-1s 4-226-871-3s 4-226-871-4s 4-226-871-5s 4-226-871-6s 4-226-871-7s 4-226-871-8s RadioFans.CN 收音机爱 好者资料库 4 SECTION 1 GENERAL Location of controls Front view 1 I/1 button 2 Function Buttons

36、3 INPUT MODE button 4 5.1CH INPUT button 8 DIMMER button 9 DISPLAY button q; A. F. D button/indicator 2CH button/indicator MODE button/indicator qa CINEMA STUDIO EX. A C buttons qs MULTI CHANNEL DECORDING indicator qd PRESET TUNING +/ buttons SHIFT button TUNING +/ buttons FM/AM button FM MODE butto

37、n qf 2ND AUDIO button (STR-DE945) qg BASS BOOST button qh EQUALIZER button qj SET UP button qk NAME button ql ENTER button w; cursor buttons () wa Jog dial ws EQ button wd SUR button wf LEVEL button 5 MASTER VOLUME control 6 MUTING button 7 SPEAKERS button PHONE jack + PHONES SPEAKERS DIMMERDISPLAY

38、INPUT MODE VIDEO 1 VIDEO 2 VIDEO 3 DVD/LDTV/SAT CINEMA STUDIO EX. MULTI CHANNEL DECODING TAPEMD/DATCDTUNERPHONO 5.1CH INPUT A BOFF A+B SOUND FIELD A.F.D. ABC 2CHMODE LEVEL SUR EQ SET UP MASTER VOLUME BASS BOOSTEQUALIZER NAME ENTER 010 VIDEO 3 INPUT MUTING BASS BOOST PRESET TUNING TUNING + +MEMORY FM

39、/AMFM MODE2ND AUDIO SHIFT EQUALIZER VIDEOL AUDIO R 5.1CH INPUT 123 45 67 4 + PHONES SPEAKERS DIMMERDISPLAY INPUT MODE VIDEO 1 VIDEO 2 VIDEO 3 DVD/LDTV/SAT CINEMA STUDIO EX. MULTI CHANNEL DECODING TAPEMD/DATCDTUNERPHONO 5.1CH INPUT A BOFF A+B SOUND FIELD A.F.D. ABC 2CHMODE LEVEL SUR EQ SET UP MASTER

40、VOLUME BASS BOOSTEQUALIZER NAME ENTER 010 VIDEO 3 INPUT MUTING BASS BOOST PRESET TUNING TUNING + +MEMORY FM/AMFM MODE2ND AUDIO SHIFT EQUALIZER VIDEOL AUDIO R 8 90qaqsqdqf qg qjql qhqkw; wawd wf ws (STR-DE945 only)(STR-DE845 only) 5 1 ANTENNA terminal 2 5.1CH INPUT jack 3 DIGITAL jack OPTICAL jack CO

41、AX jack 4 SPEAKERS terminal FRONT (A/B) terminal REAR terminal CENTER terminal 5 SUB WOOFER jack 6 IMPEDANCE SELECTOR switch 7 AC POWER cord 8 AC OUTLET 9 CONTROL A1II jack q; 2ND AUDIO OUT jack Rear View qa VIDEO 1 jack qs VIDEO 2 jack qd DVD/LD jack qf TV/SAT jack qg TAPE jack (STR-DE945) qh MD/DA

42、T jack (STR-DE945) MD/TAPE jack (STR-DE845) qj CD jack qk PHONO jack ql MONITOR jack 4 8 BA RLRL + + IMPEDANCE USE 4 168 16 SPEAKERS IN L R OUT SIGNAL GND COAXIAL AM U U ANTENNA TAPE IMPEDANCE SELECTOR FRONT IN PHONO IN CD 2ND AUDIO OUT REARFRONTCENTER MONITOR INOUT MD/DAT AUDIO IN VIDEO IN S-VIDEO

43、IN VIDEO OUT S-VIDEO OUT VIDEO IN CTRL S OUT VIDEO OUT VIDEO OUT CTRL S OUT VIDEO IN S-VIDEO IN S-VIDEO IN VIDEO IN S-VIDEO OUT CTRL S STATUS IN CTRL S IN AUDIO OUT VIDEO 1 AUDIO IN TV/SAT AUDIO IN DVD/LD AUDIO INAUDIO OUT VIDEO 2 FM 75 + + RL RL AC OUTLET SUB WOOFER AUDIO OUT CONTROL A1 DVD/LD IN D

44、VD/LD IN TV/SAT IN MD/DAT IN MD/DAT OUT DIGITAL OPTICALCOAX L R REARFRONTCENTER SUB WOOFER 5.1CH INPUT 4 8 56231 qfqdqsqaq;9qgqhqjqkql 7 Setting (E model) a voltage selector If your receiver has a voltage selector on the rear panel, check that the voltage selector on the rear panel of the receiver i

45、s set to the local power supply voltage. If not, use a screwdriver to set the selector to the correct position before connecting the AC power cord to a wall outlet. 220V 240V 120V VOLTAGE SELECTOR 6 CASE 5.1 IN BOARD, AU SW BOARD, TUNER Note: Follow the disassembly procedure in the numerical order g

46、iven. SECTION 2 DISASSEMBLY 1 two screws 3 case 2 2 1 two screws 1 two screws 3 four screws (BVTP 3X8 ) 1 wire (flat type) (15 core) (CN1) 4 tuner 5 5.1 IN board, AU SW board 2 connector (CNP10) 7 VIDEO/OSD/JOINT (1) (H)/OSD JOINT (H)/ S-VIDEO/DIGITAL BOARD HEAT SINK 1 wire (flat type) (15 core) (CN51) 5 bracket (digital) 1 wire (flat type) (21 core) (CN55) 4 DIGITAL board 8 VIDEO board (DE845)/OSD board (DE945), JOINT (1) (H