Sony-STRDB870-rec-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL FM STEREO/FM-AM RECEIVER SPECIFICATIONS STR-DB870/DB1070 Photo: STR-DB870 Ver. 1.6 2005.09 9-873-842-17Sony Corporation 2005I05-1Audio Group 2005.09Published by Sony Engineering Corporation US Model E Model Chinese Model STR-DB1070 Canadian Model AEP Model UK Model STR-DB870/DB1070 Co

2、ntinued on next page This receiver incorporates Dolby* Digital and Pro Logic Surround and the DTS* Digital Surround System. * Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories. *“DTS” and “DTS Digital Surround” are r

3、egistered trademarks of Digital Theater Systems, Inc. AUDIO POWER 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 milliwatt

4、s to rated output (Models of area code U only). Amplifier section POWER OUTPUT Models of area code U, CA Rated Power Output at Stereo Mode (8 ohms 20 Hz 20 kHz, THD 0.09 %) 100 W + 100 W (4 ohms 20 Hz 20 kHz, THD 0.09 %) 90 W + 90 W Reference Power Output (8 ohms 20 Hz 20 kHz, THD 0.09 %) STR-DB1070

5、:FRONT1):100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W SURR BACK1): 100 W STR-DB870:FRONT1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (4 ohms 20 Hz 20 kHz, THD 0.09 %) STR-DB1070:FRONT:1) 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SURR BACK1): 90 W STR-DB870:FRONT1):90 W + 90 W

6、CENTER1): 90 W SURR1): 90 W + 90 W Models of other area code Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7 %) STR-DB1070:100 W + 100 W2) 90 W + 90 W3) STR-DB870:100 W + 100 W2) (4 ohms 1 kHz, THD 0.7 %) STR-DB1070:90 W + 90 W2) 80 W + 80 W3) STR-DB870:100 W + 100 W2) Reference Power Outpu

7、t2) (8 ohms 1 kHz, THD 0.7 %) STR-DB1070:FRONT1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W SURR BACK1): 100 W STR-DB870:FRONT1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (4 ohms 1 kHz, THD 0.7 %) STR-DB1070:FRONT1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SURR BACK1): 90

8、 W STR-DB870:FRONT1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (8 ohms 20 Hz 20 kHz, THD 0.09 %) STR-DB1070:FRONT1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SURR BACK1): 90 W STR-DB870:FRONT1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W (4 ohms 20 Hz 20 kHz, THD 0.09 %) STR-DB1

9、070:FRONT1): 80 W + 80 W CENTER1): 80 W SURR1): 80 W + 80 W SURR BACK1): 80 W STR-DB870:FRONT1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W 1) Depending on the sound field settings and the source, there may be no sound output. 2) Measured under the following conditions: Area codePower requiremen

10、ts E240 V AC, 50 Hz CN, SP, CEL, KR230 V AC, 50 Hz TW110 V AC, 60 Hz 3) Measured under the following conditions: Area codePower requirements CN220 V AC, 50 Hz Frequency response PHONO CD/SACD, TAPE, MD/DAT, MD/TAPE, TV/SAT, DVD/LD, VIDEO 1, 2, 3 RIAA equalization curve 0.5 dB 10 Hz 100 kHz 3 dB (wit

11、h sound field, equalizer, and bass boost bypassed) RadioFans.CN 收音机爱 好者资料库 2 STR-DB870/DB1070 Abbreviation CA : Canadian model CEL : AEP and UK models CN : Chinese model KR : Korean model SP: Malaysia and Singapore models TW : Taiwan model U: US model Separation45 dB at 1 kHz Frequency response30 Hz

12、 15 kHz, +0.5/2 dB Selectivity60 dB at 400 kHz AM tuner section Tuning range Models of area code U, CA With 10-kHz tuning scale: 530 1.710 kHz6) With 9-kHz tuning scale:531 1.710 kHz6) Models of area code E With 10-kHz tuning scale: 530 1.610 kHz6) With 9-kHz tuning scale:531 1.602 kHz6) Models of a

13、rea code CN, SP, CEL, TW, KR With 9-kHz tuning scale:531 1.602 kHz AntennaLoop antenna Usable sensitivity50 dB/m (at 1,000 kHz or 999 kHz) S/N54 dB (at 50 mV/m) Harmonic distortion0.5 % (50 mV/m, 400 kHz) Selectivity At 9 kHz:35 dB At 10 kHz:40 dB 6) You can change the AM tuning scale to 9 kHz or 10

14、 kHz. After tuning in any AM station, turn off the receiver. Hold down TUNING and press ?/1. 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 Inputs Video:1 Vp-p, 75 ohms S-video:Y: 1 Vp-p, 75 ohms C: 0.

15、286 Vp-p, 75 ohms Outputs Video:1 Vp-p, 75 ohms S-video:Y: 1 Vp-p, 75 ohms C: 0.286 Vp-p, 75 ohms General Power requirements Area codePower requirements U, CA120 V AC, 60 Hz CEL230 V AC, 50/60 Hz CN, SP220 230 V AC, 50/60 Hz E120/220/240 V AC, 50/60 Hz TW110 V AC, 60 Hz KR220 V 230 V AC, 60 Hz Power

16、 consumption Area codePower consumption USTR-DB1070: 300 W CASTR-DB1070: 420 VA STR-DB870: 390 VA CELSTR-DB1070: 240 W STR-DB870: 230 W CN, SP, E, TW, KR STR-DB1070: 240 W AC outlets Area codeAC outlets U, CA2 switched, 120 W/1A MAX SP, CEL, KR1 switched, 100 W MAX CN, E, TW2 switched, 100 W MAX Dim

17、ensions430 161 401 mm including projecting parts and controls Mass (Approx.)16.0 kg Supplied accessories FM wire antenna (1) AM loop antenna (1) Models of area code U, CA Audio/video/control S connecting cord (1) Control S connecting cord (1) STR-DB1070 only Models of area code U, CA Remote commande

18、r RM-PP505L (1) R6 (size-AA) batteries (2) Models of other area codes Remote commander RM-LP205 (1) R6 (size-AA) batteries (3) STR-DB870 only Models of area code CA Remote commander RM-PP505 (1) R6 (size-AA) batteries (2) Models of area code CEL Remote commander RM-U305 (1) R6 (size-AA) batteries (2

19、) Design and specifications are subject to change without notice. Inputs (Digital) DVD/LD (Coaxial) DVD/LD, TV/SAT, MD/DAT, MD/TAPE (Optical) Outputs TAPE, MD/DAT, MD/ TAPE (REC OUT), VIDEO 1, 2 (AUDIO OUT) FRONT L/R, CENTER, SURROUND L/R, SURROUND BACK, SUB WOOFER EQ BASS:99 Hz1.0 kHz (21 steps) MI

20、D:198 Hz10 kHz (37 steps) TREBLE:1.0 kHz10 kHz (23 steps) Gain levels:10 dB, 1 dB step FM tuner section Tuning range87.5 - 108.0 MHz Antenna terminals75 ohms, unbalanced Sensitivity Mono:18.3 dBf, 2.2 V/75 ohms Stereo:38.3 dBf, 22.5 V/75 ohms Usable sensitivity11.2 dBf, 1 V/75 ohms S/N Mono:76 dB St

21、ereo:70 dB Harmonic distortion at 1 kHz Mono:0.3% Stereo:0.5% Sensitivity: Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF) Sensitivity: Impedance: S/N: 100 dB (A, 20 kHz LPF) Voltage: 150 mV Impedance: 1 kilohms Voltage: 2 V Impedance: 1 kilohms Inputs (Analog) PHONO MULTI CH IN (1, 2), CD/SACD, TAPE

22、, MD/DAT, MD/TAPE, DVD/LD, TV/SAT, VIDEO 1, 2, 3 4) INPUT SHORT. 5) Weighted network, input level. Sensitivity: 2.5 mV Impedance: 50 kilohms S/N4): 86 dB (A, 2.5 mV5) Sensitivity: 150 mV Impedance: 50 kilohms S/N4): 96 dB (A, 150 mV5) RadioFans.CN 收音机爱 好者资料库 3 STR-DB870/DB1070 Notes on chip componen

23、t replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. 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 o

24、riginal service problem, perform the follow- ing safety check 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 TEST The AC leakage from any expose

25、d metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, 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 t

26、he manufacturers instructions to use these instruments. 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 an

27、alog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a pas- sive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS

28、 IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY-RELATED COMPONENT WARNING! C

29、OMPONENTS 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 APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. RadioFans.CN 收音机爱 好者资料库 4 STR-DB

30、870/DB1070 1.SERVICING NOTES.5 2.GENERAL.6 3.DISASSEMBLY 3-1.Disassembly Flow .8 3-2.Case .9 3-3.S-VIDEO board, VIDEO Board, Tuner.9 3-4.VIDEO AU Board . 10 3-5.DIGITAL Board . 10 3-6.MAIN Board . 11 4.TEST MODE. 12 5.ELECTRICAL ADJUSTMENT. 13 6.DIAGRAMS 6-1.Block Diagram TUNER/VIDEO INPUT Section .

31、 15 6-2.Block Diagram AUDIO DSP Section . 16 6-3.Block Diagram AUDIO CONTROL Section . 17 6-4.Block Diagram POWER AMP Section . 18 6-5.Block Diagram DISPLAY/KEY CONTROL Section . 19 6-6.Block Diagram POWER SUPPLY Section . 20 6-7.Note for Printed Wiring Boards and Schematic Diagrams . 21 6-8.Schemat

32、ic Diagram DIGITAL Board (1/5) . 23 6-9.Schematic Diagram DIGITAL Board (2/5) . 24 6-10. Schematic Diagram DIGITAL Board (3/5) . 25 6-11. Schematic Diagram DIGITAL Board (4/5) . 26 6-12. Schematic Diagram DIGITAL Board (5/5) . 27 6-13. Printed Wiring Board DIGITAL Board (Component Side) . 28 6-14. P

33、rinted Wiring Board DIGITAL Board (Conductor Side) . 29 6-15. Printed Wiring Board VIDEO Board . 30 6-16. Schematic Diagram VIDEO Board . 31 6-17. Printed Wiring Boards S-VIDEO/VIDEO AU Boards . 32 6-18. Schematic Diagram S-VIDEO/VIDEO AU Boards . 33 6-19. Printed Wiring Board MAIN Board . 34 6-20.

34、Schematic Diagram MAIN Board (1/3) . 35 6-21. Schematic Diagram MAIN Board (2/3) . 36 6-22. Schematic Diagram MAIN Board (3/3) . 37 6-23. Printed Wiring Board BIAS Board . 38 6-24. Schematic Diagram BIAS Board . 39 6-25. Printed Wiring Boards DISP/SW Boards . 40 6-26. Schematic Diagram DISP/SW Board

35、s . 41 6-27. Printed Wiring Boards H.P/MUTING/POWER/SP/VIDEO 3 Boards . 42 6-28. Schematic Diagram H.P/MUTING/POWER/SP/VIDEO 3 Boards . 43 6-29. Printed Wiring Boards POWER SUPPLY Section . 44 6-30. Schematic Diagram POWER SUPPLY Section . 45 6-31. IC Pin Function Description . 51 Ver 1.2 7.EXPLODED

36、 VIEWS 7-1.Case Section . 63 7-2.Front Panel Section-1. 64 7-3.Front Panel Section-2. 65 7-4.Chassis Section-1 . 66 7-5.Chassis Section-2 . 67 8.ELECTRICAL PARTS LIST. 68 TABLE OF CONTENTS 5 STR-DB870/DB1070 SECTION 1 SERVICING NOTES MODEL IDENTIFICATION Rear Panel PART No. ModelPART No. DB1070: US

37、model4-233-610-0 DB1070: Canadian model4-233-610-1 DB1070: Malaysia and Singapore models 4-233-610-2 DB1070: Chinese model4-233-610-3 DB1070: AEP and UK models4-233-610-5 DB1070: 120 V AC area and 240 V AC area in E models 4-233-610-7 DB1070: Taiwan model4-233-610-8 DB1070: Korean model4-233-610-9 D

38、B870 : Canadian model4-233-630-1 DB870 : AEP and UK models4-233-630-2 SERVICE POSITION In checking the DIGITAL board, prepare jig (extension cable J-2501-208-A: 200 mm 21 core). Connect jig (extension cable J-2501-208-A) to the MAIN board (CN806, 807) and DIGITAL board (CN1102, 1103). DIGITAL board

39、MAIN board 6 STR-DB870/DB1070 SECTION 2 GENERAL This section is extracted from instruction manual. wswfwdwhe;eswjwk eaed wawg 1 2 3qj4qd5670qa qsqfqgqhqk qlw;8 9 wlef eg el r;rfrg eh ejekrard rs 2CH qg (30) 2ND ROOM (STR-DB1070 only) eg (27) 6.1CH DECODING 0 (31) 6.1CH DECODING indicator 7 (31) A.F.

40、D. qf (30) AUDIO SPLIT wa (25) CINEMA STUDIO EX qa (28) Cursor buttons (/) wj (19, 33, 35, 36, 43, 45) DIGITAL CONCERT HALL qs (29) DIMMER 4 (27) DIMMER indicator rs (27) Digital Cinema Sound indicator 5 (28) Display qj (32) DISPLAY 3 (27, 41) DOOR OPEN wg ENTER wh (43) EQ e; (36) EQUALIZER ef (36)

41、FM/AM 6 (38, 39) FM MODE r; (39) FUNCTION wd (24, 25, 38, 39, 40, 43) INPUT MODE wf (26) IR receptor 2 Jog dial wk (19, 33, 35, 36, 43, 45) LEVEL wl (35) MASTER VOLUME w; (24, 26) MEMORY el (38, 40) MODE +/ qh (28, 37) MULTI/2CH A. DIRECT qk (26, 30) MULTI CHANNEL DECODING indicator qd MUTING ws (26

42、) NAME ed (43) NIGHT MODE ql (31) ON SCREEN (STR-DB1070 only) rd (10) PHONES jack rg (26) PRESET TUNING +/ 9 (40) PTY SELECT +/ (AEP and UK models) eh (41) RDS/PTY (AEP and UK models) ek (41) SET UP es (19, 45) SHIFT 8 (40) SLEEP (Except AEP and UK models) ek (44) SPEAKERS switch rf (26) STREAM INFO

43、 (STR-DB870 only) eg (27) SURR ea (33) TEST TONE ej (24) TUNING +/ eh (39) VIDEO 3 INPUT jacks ra ?/1 (power) 1 (18, 23, 24, 37, 38) LOCATION OF CONTROLS Front Panel 7 STR-DB870/DB1070 1 qdqfqgqhqlw;qjqk 2439qaqs5806 7 1 DIGITAL jack 2 ANTENNA terminal 3 CONTROL A1 II jack 4 MONITOR jack 5 TV/SAT ja

44、ck 6 DVD/LD jack 7 VIDEO 2 jack 8 VIDEO 1 jack 9 COMPONENT VIDEO jack (US and Canadian models) 0 SPEAKER terminal qa PRE OUT jack qs IMPEDANCE SELECTOR switch qd MULTI CH IN jack (STR-DB870) MULTI CH IN 2 jack (STR-DB1070) qf MULTI CH IN 1 jack (STR-DB1070) qg PHONO jack qh CD/SACD jack qj MD/TAPE jack (STR-DB870) MD/DAT jack (STR-DB1070) qk TAPE jack (STR-DB1070) ql 2ND ROOM jack (STR-DB1070) w; AC OUTLET Setting the voltage selector (120 V AC area and 240 V AC area in E models) If yo