Sony-STRDB900-rec-sm 电路图 维修手册.pdf

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1、STR-DB900 AEP Model UK Model E Model SERVICE MANUAL FM STEREO FM/AM RECEIVER Sony Corporation Audio Group Published by Sony Engineering Corporation 9-879-123-01 2004H0278-1 2004.08 SPECIFICATIONS Ver 1.0 2004.08 Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-

2、D symbol are trademarks of Dolby Laboratories. “DTS” and “DTS Digital Surround” are trademarks of Digital Theater Systems, Inc. Amplifier section POWER OUTPUT Rated power output in stereo mode (8 ohms, 1 kHz, DIN)120 W + 120 W Reference power output (8 ohms, 20 Hz 20 kHz, THD 0.7%) FRONT*: 100 W + 1

3、00 W CENTER*: 100 W SURROUND*:100 W + 100 W SURROUND BACK*:100 W * Depending on the sound field settings and source being used, there may be no sound output. Inputs (Analog)Sensitivity: 500 mV Impedance:50 kilohms Inputs (Digital) DVD (Coaxial)Impedance: 75 ohms Outputs LINE (subwoofer)Voltage: 2 V

4、Impedance: 1 kilohm FM tuner section Tuning range87.5 108.0 MHz Antenna terminals75 ohms, unbalanced Intermediate frequency10.7 MHz AM tuner section Tuning range531 1,602 kHz AntennaLoop antenna Intermediate frequency450 kHz General Receiver Power requirements230 V AC, 50/60 Hz Power consumption130

5、W Dimensions (w/h/d)430 85 400 mm including projecting parts and controls Mass (approx.)6.2 kg Remote control Remote control systemInfrared control Power requirements3 V DC with two R6 (size-AA) batteries Dimensions210 49 25 mm Mass (approx.)85 g excluding batteries Supplied accessories FM wire ante

6、nna (1) AM loop antenna (1) Remote commander (1) R6 (size AA) batteries (2) Design and specifications are subject to change without notice. RadioFans.CN 收音机爱 好者资料库 STR-DB900 2 Unleaded solder Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder cont

7、ains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.) : LEAD FREE MARK Unleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40C higher than ordinary solder. Ordinary soldering irons c

8、an be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! SAFETY-RELATED C

9、OMPONENT 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 NUM- BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE- MENTS PUBLISHED BY SONY. Strong visc

10、osity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. Notes on chip c

11、omponent replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. TABLE OF CONTENTS 1.SERVICING NOTES 1-1.AMP Board, DIGITAL Board Service Position.3 1-2.Note on Checking AMP Board or DIGITAL Board While Turning on Electricit

12、y .3 1-3.Note on AMP Board Removal.4 1-4.Note on Heat Sink Installation .4 1-5.Note on Checking POWER Board While Turning on Electricity 1 .5 1-6.Note on Checking POWER Board While Turning on Electricity 2 .5 2.GENERAL.6 3.TEST MODE.7 4.DIAGRAMS 4-1.Block Diagram INPUT/TUNER Section . 13 4-2.Block D

13、iagram AUDIO DSP Section . 14 4-3.Block Diagram DAMP Section . 15 4-4.Block Diagram DISPLAY Section . 16 4-5.Schematic Diagram DIGITAL Section (1/3) . 17 4-6.Schematic Diagram DIGITAL Section (2/3) . 18 4-7.Schematic Diagram DIGITAL Section (3/3) . 19 4-8.Printed Wiring Board DIGITAL Board (Side A)

14、. 20 4-9.Printed Wiring Board DIGITAL Board (Side B) . 21 4-10. Printed Wiring Board AMP Board (Side A) . 22 4-11. Printed Wiring Board AMP Board (Side B) . 23 4-12. Schematic Diagram AMP Board (1/4) . 24 4-13. Schematic Diagram AMP Board (2/4) . 25 4-14. Schematic Diagram AMP Board (3/4) . 26 4-14.

15、 Schematic Diagram AMP Board (4/4) . 27 4-15. Printed Wiring Board VIDEO, ANALOG IN Board . 28 4-16. Schematic Diagram VIDEO, ANALOG IN Board . 29 4-17. Printed Wiring Board DISPLAY Section . 30 4-18. Schematic Diagram DISPLAY Section . 31 4-19. Printed Wiring Board POWER Section . 32 4-20. Schemati

16、c Diagram POWER Section . 33 5.EXPLODED VIEWS 5-1.Case Section . 43 5-2.Front Panel Section . 44 5-3.Chassis Section. 45 6.ELECTRICAL PARTS LIST. 46 RadioFans.CN 收音机爱 好者资料库 3 STR-DB900 SECTION 1 SERVICING NOTES 1-1.AMP BOARD, DIGITAL BOARD SERVICE POSITION In case of checking AMP board or DIGITAL bo

17、ard from bottom side, please remove those with back panel. 1-2.NOTE ON CHECKING AMP BOARD OR DIGITAL BOARD WHILE TURNING ON ELECTRICITY In case of checking AMP board or DIGITAL board while turning on electricity, please connect with an crocodile clip connector between back panel and chassis. AMP boa

18、rd back panel DIGITAL board insulating sheet AMP board DIGITAL board chassis back panel crocodile clip connector RadioFans.CN 收音机爱 好者资料库 4 STR-DB900 1-3.NOTE ON AMP BOARD REMOVAL 1-4.NOTE ON HEAT SINK INSTALLATION Be sure to install it in the direction as shown in the figure. AMP board In case of re

19、moving AMP board, remove these 6 screws first, it is easy to remove it. heat sink AMP board insulating sheet 5 STR-DB900 1-5.NOTE ON CHECKING POWER BOARD WHILE TURNING ON ELECTRICITY 1 In case of checking POWER board while turning on electricity, please connect with crocodile clip connectors between

20、 two ground terminals (EP902, 904) and chassis. 1-6.NOTE ON CHECKING POWER BOARD WHILE TURNING ON ELECTRICITY 2 Do not touch the capacitor (C916) on POWER board while turning on electricity, because of the voltage becomes 350VDC (Max.). EP902 chassis EP904 POWER board crocodile clip connector crocod

21、ile clip connector C916 BOARDPOWER (SIDE B) STR-DB900 6 SECTION 2 GENERAL This section is extracted from instruction manual. Main unit DIRECT qa DISPLAY 6 Display window 4 INPUT MODE 5 INPUT SELECTOR 7 MULTI CH IN qs PHONES jack qg POWER (power) switch 2 PRESET TUNING +/ qf SOUND FIELD q; STANDBY in

22、dicator 3 SURROUND BACK DECODING qd VOLUME 8 (remote sensor) 1 2CH 9 List of button locations and reference pages ALPHABETICAL ORDERNUMBERS AND SYMBOLS 28 9 65371 qgqfqd qs qa q; 4 7 STR-DB900 SECTION 3 TEST MODE FL TEST MODE Fluorescent segments display test Procedure: 1.Press the POWER button to t

23、urn the set off. 2.To enter the test mode, while pressing the two buttons DISPLAY and SOUND FIELD, press POWER button. 3.All segments turn on. 4.To exit from this mode, press the POWER button to turn the set off. VERSION CHECK Firmware Version Check Procedure: 1.Press the POWER button to turn the se

24、t off. 2.To enter the test mode, while pressing the two buttons DIRECT and SOUND FIELD, press POWER button. 3.The message version “ DB9 CE 1.05 ” is displayed. 4.To exit from this mode, press the POWER button to turn the set off. KEY CHECK Check the buttons operate normally or not. Procedure: 1.Pres

25、s the POWER button to turn the set off. 2.To enter the test mode, while pressing the two buttons DIRECT and SURR BACK DECODING, press POWER button. 3.The message “ RESET * ” is displayed. *: Number of buttons 4.Every time you press the button, * counts down one by one. 5.In case of every buttons are

26、 pressed, the finished indication “ RESET 00 ” appears. 6.To exit from this mode, press the POWER button to turn the set off. SWAP ALL MODE Outputs of speakers checking mode. The L/R channel signals output from all of the speakers. Procedure: 1.Press the POWER to turn the set off. 2.To enter the tes

27、t mode, while pressing the two buttons INPUT MODE and MULTI CH IN, press POWER button. 3.The message “ SWAPMODE ” is displayed. 4.The L/R channel signals output from all of the speakers. 5.In this mode, every time pressing PRESET + button, VOLUME LEVEL changes. 6.To exit from this mode, press the PO

28、WER button to turn the set off. HISTORY MODE Display of the internal information on the protector being activated. (SF, Volume level value, Tone setting, Operating time) Procedure: 1.Press the POWER button to turn the set off. 2.To enter the test mode, while pressing the two buttons INPUT MODE and S

29、URR BACK DECODING, press POWER button. VOL MINVOL 34VOL MAX 8 STR-DB900 3.Select the display contents with cursor / buttons on the remote commander. Note: In case of pressing buttons except for cursor / buttons, the Test Mode is released. HISTORY button Display item number * * * * * * * * f buttonF

30、00 button * * * * * * * * f buttonF 10 button * * * * * * * * f buttonF 20 button * * * * * * * * f buttonF 30 button * * * * * * * * f buttonF 40 button * * * * * * * * f buttonF 01 button VOL * * f buttonF 11 Volume level (-40dB and below) operating time Volume level (From -20dB to -39dB) operatin

31、g time Volume level (From -10dB to -19dB) operating time Volume level (From 0dB to -9dB) operating time Power ON total time Operating time on the protector being activated Volume level display value on the protector being activated button * * * * * * * * f buttonF 21 button * * * * * * * * f buttonF

32、 31 button * * * * * * * * f buttonF 41 button f buttonF Sound Field name display on the protector being activated Input Selector name display on the protector being activated Input Mode display on the protector being activated * * * * * * * *51 button f buttonF Input signal format type display on t

33、he protector being activated * * * * * * * *61 button * * * * * * * * f buttonF 71 button * * * * * * * * f buttonF 81 button f buttonF Configuration (Channel) display on the protector being activated Speaker setting display on the protector being activated Bass level display on the protector being

34、activated * * * * * * * *91Treble level display on the protector being activated F f F f *-*: Each data display or numerical value. Operating time display : Display in units of 5 minutes (Unit: Minutes) (Ex.: 27 minutes - “25”, 10 minutes - “10”, 38 minutes - “35”, 20 hours - “1200”, 1 year - “52560

35、0”, 5 years - “2628000” 9 STR-DB900 (Display example on the protector being activated.) Item Number 01: Item Number 11: Item Number 21: Item Number 31: Item Number 41: Item Number 51: Item Number 61: Item Number 71: Item Number 81: Item Number 91: In case of the protector has never activated.: 4.To

36、exit from this mode, press the POWER button to turn the set off. Item Number 25 01 Operating Time On 27 minutes operating time 25 11VOL Volume level 25 display PL 21DOLBY Sound Field name display; DOLBY PRO LOGIC 31DVD Input selector display; DVD 41AUTO IN In using AUTO mode 41DIGITAL NET MEDIA 41CO

37、AX IN COAX FIX 41OPT IN OPT FIX 41ANALOG ANALOG FIX 51DOLBY D DOLBY DIGITAL signal input 613/2 +LFE 3/2.1 signal input 71HP IN Headphones is inserted. 71SP ON Headphones is not inserted 81BASS -06 Tone Bass Level is -6dB 91TREB -03 Tone Treble Level is -3dB YZ_ _ _ _ _ _ _ _ All segments are - Item

38、Number 10 STR-DB900 SECTION 4 DIAGRAMS Circuit Boards Location DISPLAY board AC SW board HP board VOL board VIDEO board POWER board AMP board DIGITAL board REG board ANALOG IN board tuner unit LED board 11 STR-DB900 Note on Schematic Diagram: All capacitors are in F unless otherwise noted. (p: pF) 5

39、0 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. %: indicates tolerance. f: internal component. 2 : nonflammable resistor. C : panel designation. A : B+ Line. B : B Line. Voltages and waveforms are dc with respe

40、ct to ground un- der no-signal conditions. No mark : FM * : Impossible to measure Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal producti

41、on tolerances. Circled numbers refer to waveforms. Signal path. F: FM g: VIDEO Abbreviation SP: Singapore model MY: Malaysia model NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS (In addition to this necessary note is printed in each block.) Note on Printed Wiring Board: X : parts extracted fr

42、om the component side. a: Through hole. : Pattern from the side which enables seeing. Abbreviation SP: Singapore model MY: Malaysia model Caution: Pattern face side: Parts on the parts face side seen from (Side A)the parts face are indicated. Parts face side:Parts on the pattern face side seen from

43、(Side B)the pattern face are indicated. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. 12 STR-DB900 Waveforms DIGITAL Board 80 nsec 1V AC/DIV, 50 nsec/DIV 3 Vp-p 1 IC217 qd CKOUT (O) 0.33 sec 1V AC/DIV, 0.2 sec/D

44、IV 3.3 Vp-p 2 IC217 qf BCK (O) 21 sec 1V AC/DIV, 10 sec/DIV 3.3 Vp-p 3 IC217 qg LRCK (O) 80 nsec 1V AC/DIV, 50 nsec/DIV 3.1 Vp-p 4 IC217 w; XMCK (O) 80 nsec 1V AC/DIV, 50 nsec/DIV 3.3 Vp-p 5 IC217 wa XOUT (O) 74 nsec 1V AC/DIV, 50 nsec/DIV 3.3 Vp-p 6 IC206 qs MCLK2 80 nsec 1V AC/DIV, 50 nsec/DIV 3.3

45、 Vp-p 7 IC206 qf SCKOUT 21 sec 1V AC/DIV, 10 sec/DIV 3.3 Vp-p 8 IC206 ql LRCKO 0.33 sec 1V AC/DIV, 0.1 sec/DIV 3.3 Vp-p 9 IC206 w; BCKO 80 nsec 1V AC/DIV, 50 nsec/DIV 3.5 Vp-p 0 IC202 zvc X-OUT AMP Board 20 nsec 2V AC/DIV, 20 nsec/DIV 5.2 Vp-p 1 IC325 4 20 nsec 1V AC/DIV, 20 nsec/DIV 1.8 Vp-p 2 IC30

46、1 wk XFSOIN 0.33 sec 1V AC/DIV, 0.1 sec/DIV 4 Vp-p 4 CN315 wa BCKO 1V AC/DIV, 10 sec/DIV 5 CN315 wd LRCKO 2V AC/DIV, 50 nsec/DIV 6 CN315 wg CSCK 21 sec 3.3 Vp-p 80 nsec 4.7 Vp-p 20 nsec 1V AC/DIV, 20 nsec/DIV 3.3 Vp-p 3 IC301 uj XFSOOUT 80 nsec 1V AC/DIV, 50 nsec/DIV 3.3 Vp-p 1 IC108 4 2.3 sec 1V AC/DIV, 1 sec/DIV 2.0 Vp-p 1 IC802 5 OSC ANALOG IN Board DISPLAY Board 1313 STR-DB900 STR-DB900 4-1.BLOCK DIAGRAM INPUT/TUNER