Sony-STRDB925-rec-sm 电路图 维修手册.pdf

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1、 1 MICROFILM AEP Model UK Model Australian Model SPECIFICATIONS SERVICE MANUAL FM STEREO/FM-AM RECEIVER STR-DB925 Continued on next page Photo: BLACK RadioFans.CN 收音机爱 好者资料库 2 SAFETY-RELATED COMPONENT WARNING ! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND

2、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. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum ca

3、pacitor may be damaged by heat. RadioFans.CN 收音机爱 好者资料库 3 SECTION 1 SERVICING NOTE FACTORY SET Mode which sets the preset settings of the unit to that at shipment. Procedure: With the power off, press the 1/u button while pressing the SET UP and SOUND FIELD ON/OFF buttons to turn ON the power. “FACT

4、ORY SET” will be displayed and FACTORY PRESET will be executed. As the “DEMO MODE” will automatically be set about 1 minute later, press the 1/u button to turn OFF the power. INITIALIZATION This mode erases all the preset settings of the unit. Use this mode when returning the unit to custimer. Proce

5、dure: With the power off, press the 1/u button while pressing the DISPLAY and SOUND FIELD ON/OFF buttons to turn ON the power. As the “DEMO MODE” will automatically be set about 1 minute later, press the 1/u button to turn OFF the power. FLUORESCENT INDICATOR TUBE AND LED LIGHTING CHECK Mode which l

6、ights up the whole fluorescent indicator tube or partially. Procedure: With the power off, press the 1/u button while pressing the SET UP and SOUND FIELD MODE buttons to turn ON the power. The whole fluorescent display tube will light up. As the “DEMO MODE” will automatically be set about 1 minute l

7、ater, press the 1/u button to turn OFF the power. DEMO MODE (NOT USED IN SERVICE) Mode for demonstration Procedure: With the power off, press the 1/u button while pressing the CURSOR button to turn ON the power. To end, press the 1/u button to turn OFF the power. PRECAUTIONS ON REMOVING THE FRONT PA

8、NEL When the front panel is removed, the front panel board and VOLUME board cannot be connected, thus causing the following problems. The MASTER VOLUME LED does not light up The MASTER VOLUME cannot be turned UP/DOWN using the remote controller. 1. SERVICING NOTE.3 2. GENERAL.5 3. DIAGRAMS 3-1. Circ

9、uit Boards Location .6 3-2. Block Diagrams DSP Section .7 Input Section.9 Power Section .11 Dolby Section .13 3-3. Schematic Diagram Input Section .17 3-4. Printed Wiring Board Input Section .19 3-5. Schematic Diagram Power AMP Section .21 3-6. Printed Wiring Board Power AMP Section .23 3-7. Schemat

10、ic Diagram Trans Section .25 3-8. Printed Wiring Board Trans Section .27 3-9. Schematic Diagram Rear AMP Section .29 3-10. Printed Wiring Board Rear AMP Section .31 3-11. Schematic Diagram Display Section .33 3-12. Printed Wiring Board Display Section .35 3-13. Schematic Diagram Panel Section .37 3-

11、14. Printed Wiring Board Panel Section .39 3-15. Schematic Diagram Back Panel Section . 41 3-16. Printed Wiring Board Back Panel Section . 43 3-17. Schematic Diagram Volume Section . 45 3-18. Printed Wiring Board Volume Section .47 3-19. Schematic Diagram D In/Out Section . 49 3-20. Printed Wiring B

12、oard D In/Out Section .50 3-21. Schematic Diagram Digital (1/2) Section . 51 3-22. Schematic Diagram Digital (2/2) Section . 53 3-23. Printed Wiring Board Digital Section . 55 3-24. IC Block Diagrams .57 3-25. IC Pin Functions .60 4. EXPLODED VIEWS 4-1. Case and Back Panel Section. 68 4-2. Front Pan

13、el Section .69 4-3. Chassis Section .70 5. ELECTRICAL PARTS LIST. 71 TABLE OF CONTENTS RadioFans.CN 收音机爱 好者资料库 4 DSP SELF DIAGNOSIS FUNCTION This unit is equipped with a DSP self-diagnosis function. After completing self-diagnosis, the “DSP TEST MODE” can be set, where signals input from the externa

14、l equipment will be assigned to the designated channels as shown in the table below. Table-1 Assignment of Signals in DSP TEST MODE Procedure: 1. Connect external equipment such as CD and DVD players using the DIGITAL cable (optical or coaxial). 2. Rotate the FUNCTION knob, and switch to the FUNCTIO

15、N connecting the external equipment. 3. Press the INPUT MODE button, and select the type of DIGITAL signal connected at 1. (“AUTO INPUT” is recommended for convenience.) 4. Press the 1/u button to turn OFF the power. 5. Press the 1/u button while pressing the SET UP and SOUND FIELD GENRE buttons to

16、turn ON the power. 6. Perform DSP check in the following sequence to display the results. If no problems, “DSP NO ERROR” will be displayed on the fluorescent indicator tube, and the reference signals of the 1 KHz internal oscillation will be output to FRONT, REAR, CENTER, and WOOFER. Sequence : 1 DS

17、P1 BOOT ERROR CHECK (DSP1:IC1301) 2 DSP1 REPLAY ERROR CHECK 3 DSP2 RAM ERROR CHECK (DSP2:IC1402 RAM:IC1402) 4 DSP2 REPLAY ERROR CHECK Refer to Table 2 if errors occur and perform the repairs. Table-2 Display of Errors and Main Causes 7. Each time the button is pressed, the display changes between “D

18、SP TEST MODE” and “DSP NO ERROR”. When “DSP TEST MODE” is displayed, the signals input from the external equipment connected at 1. will be assigned to the outputs as shown in Table 1. When “DSP NO ERROR” is displayed, the reference signal of the internal oscillation will be output to the FRONT, REAR

19、, CENTER, and WOOFER channels. (Each time the button is pressed, self-diagnosis will be executed from 3 of step 6. 8. To end, press the 1/u button and turn OFF the power. Note: Do not touch other buttons except during this mode with a specific purpose. Messages are displayed in the same way as in no

20、rmal operations. Operations itself will not be normal here, therefore if other buttons or knobs are touched by accident and the message is changed, press the 1/u button to turn OFF the power and exit the mode. Output To FRONT L-ch + CENTER + REAR L-ch FRONT R-ch + WOOFER + REAR R-ch Possible Cause a

21、nd Countermeasure Faulty connection of IC1301, fault around the power supply of IC1301 Fault of peripheral circuit of Pin of IC1301 Faulty connection with RAM (IC1402) Faulty communication with microprocessor, fault of peripheral circuit of Pin ! of IC1401, fault around power supply and clock of IC1

22、401 Error Message DSP1 BOOT ERROR DSP1 REPLY ERROR DSP2 RAM ERROR DSP2 REPLY ERROR Input Signal FRONT L-ch FRONT R-ch 5 Front Panel Descriptions SECTION 2 GENERAL LOCATION OF PARTS AND CONTROLS 11/u (power) switch 2VIDEO 1 indicator 3VIDEO 2 indicator 4VIDEO 3 indicator 5DVD indicator 6TV/LD indicat

23、or 7MULTI CHANNEL DECODING indicator 8TAPE indicator 9MD/DAT indicator 10 CD indicator 11 TUNER indicator 12 PHONO indicator 13 MASTER VOLUME knob and indicator 14 MUTING indicator 15 MUTING button 16 FUNCTION knob 17 MODE switch 18 SOUND FIELD indicator 19 EQ indicator 20 BASS BOOST button 21 BALAN

24、CE knob 22 SOUND FIELD ON/OFF button 23 SOUND FIELD MODE button 24 SOUND FIELD GENRE button 25 INPUT MODE button 26 5.1 INPUT button 27 EQ ON/OFF button 28 SET UP button 29 SURROUND indicator 30 EQUALIZER indicator 31 INDEX indicator 32 buttons 33 SET UP button 34 RDS EON button 35 RDS PTY button 36

25、 TUNING + button 37 TUNING button 38 VIDEO 3INPUT jacks 39 FM MODE button 40 MEMORY button 41 DISPLAY button 42 PRESET TUNING + button 43 PRESET TUNING button 44 FM/AM button 45 SHIFT button 46 PHONES jack 47 SPEAKERS knob 7823 465110 1113 14 15 129 45 2629 17 18 211922 20 27 28 30 333435362324 2531

26、 3237383940 41 4216434446 47 6 SECTION 3 DIAGRAMS 3-1. CIRCUIT BOARDS LOCATION S-VIDEO board REG board DISPLAY board AMP board LED board INPUT board DIGITAL board SP-S board JOINT board H.P board AC board BALANCE board VIDEO board AUDIO board TUNER board 5.1 IN board D. IN/OUT board ROTARY board SW

27、board F-VIDEO board SP SW board VOLUME board REAR AMP board 8 STR-DB925 3-2. BLOCK DIAGRAMS DSP SECTION 7 DOLBY SECTION E (Page 14) POWER SECTION F (Page 11) DOLBY SECTION D (Page 13) INPUT SECTION G (Page 10) X1201 4MHz 10 8 12 3 5 1 3778SOD HD0 HD7 35 HAO 36 XRST 24 XHDCS 23 HRDY 21 XHDWR 22 XHDRD

28、 16 SCLK SYSTEM CONTROL IC1201(2/2) 75 SRDT 40 ERROR 13 XTALERR 85 FUNMUTE 14 ANALOG/DIGI 15 SCDIN 17 CS 20 RESET 18 SCDIO/OUT 19 INTREQ 93 XI 92 XO SCLK 77XLAT 76 A B C SWDT 2RESET 109DIG-IN2 110DIG-IN1 111DIG-IN0 7PD 6CDTO 5CDTI 4CCLK 3CS 48EVSTB 49EVDATA 50EVCLK 84ACMUTE 52DISPDATA 55DISPCLK 51DI

29、SPMR 53SLVDATA/REQ 90RESET 101RY-FRONT/A 102RY-FRONT/B 103RY-CENTER 104RY-REAR 105WOOFER-RY 106RY-HP 107RY-POWER 79PROTEC 64STOP 9SINO 10SOTO 89MDO 87MD2 119 SIC SDTI1 SDTI2 SDTI3 SCLK XLAT SWDT RESET C B A PD CDTO CDTI CCLK CS VOL CE VOL DATA VOL CLK AMUTE UDATA UCLOCK UMREQ USREQ URESET SP/A RY SP

30、/B RY C RY SUR RY W RY HP RY P RY PROTECT STOP SINO SOTO MDO MD2 FMUTE 118 SIB 117SIA 113BCKO 115LRCKO 99 CLK1 2SOA 3SOB 4SOC 5SOD HD0 HD7 AUDATA2 AUDATA1 AUDATA0 BCK LRCK SCLK SRDT ERROR SCCLK XTALERR ANA/DIGI SCDIN CS 09 RESET SCDOUT INTREQ 14XHDCS 26XRST 15HAO 10 7470 17 STATIC RAM IC1402 CEWE XW

31、EXCE 41 XHDRD ED16 ED31EA0 EA15 9XHDWR 13HRDY DIGITAL SIGNAL PROCESSOR IC1401 16 I 20 23 I 25 7-10 13-16 29-32 35-385-1 44-42 27-24 21-18 53-60 62-6976-80 83-90 92-94 Signal path : FM : CD : DIGITAL IN 25 I 32 BUFFER Q1203 BUFFER Q1206 INVERTER IC1202 BUFFER Q1207 BUFFER Q1204,1205 SWITCH Q1208 F MU

32、TE CONTROL Q1201,1202 D0 D15A0 A15 . . . . 9 10 STR-DB925 INPUT SECTION L DATA IN FM AM FM 75 AM DO MUTING TUNED STEREO DATA CLK CE L OUT R OUT TM301 TUNER UNIT TUNER UNIT IS SUPPLIED AS THE ASSEMBLED BLOCK DO MUTING TUNED STEREO S DATA S CLK S LAT R CHR CH RDS PHONO IN LCD IN J301 J303 LIN LREC OUT

33、 J302 LFRONT LREAR J430 WOOFER 5.1/DVD INPUT MD/DAT M OUT J201 IN MONITOR J202 J203 DVD IN TV/LD IN VIDEO 2 OUT IN VIDEO 1 OUTOUT OUT V1 IN V1 OUT V2 IN V2 OUT TV LD VEE VCC SW1 SW2 SW5 SW3 SW4 VIDEO SELECT IC201 -5V REG IC202 -15V +5V 131514 AUDIO SELECT IC301 L-CHL LS CENTER WOOFER SLAT SCLK SDATA

34、 31 EQ AMP IC303 RV401 MASTER VOLUME RV402 BALANCE L F MUTE SL C W M UP DOWN VIDEO -A SYSTEM CONTROL IC1201 VIDEO-B VIDEO-E VIDEO-INH 09 TUNER MUTE STEREO AUSTOP S DATA S CLK S LAT DO MUTING STEREO TUNED S DATA S CLOCK LAT DIRECT-PASS VOL MOTOR IC103 DOWN UP LIN LREC OUT TAPE CENTER J299 VIDEO L AUD

35、IO VIDEO 3 INPUT V3 IN CONTROL AUDIO SELECT IC303 SLAT SCLK SDATA LTV/LD DVDL J305 VIDEO2 AUDIO IN AUDIO IN LAUDIO OUT L VIDEO1 AUDIO IN LAUDIO IN L LED DRIVE Q120 Y V1 O VIDEO 1 TV LD SW1 SW2 SW3 SW4 SW5 V3 O M O Y SWITCH IC252 C Y J252 VIDEO 1 Y C C Y C SWITCH IC251 C Y C J251 MONITOR J298 VIDEO 3

36、 INPUT S-VIDEO TV/LD J253 J252 J304 V1 OTV V1 I SW1 SW2 SW3 SW4 V3 O M O V1 I C Y DVD LD VA VB VC V INH RDS CLK RDS DATA ANT LEV VOL DOWN LED VOL VOL UP FNIF RDS DECODER RDS DATA RDS CLK X1 4.43MHz IC1 S-VIDEO OUT AUDIO OUT VIDEO CONTROL SELECTOR IC303 SLAT SCLK SDATA 1 LPF IC405 LPF IC406 -AMP- IC4

37、08 IC409 IC410(1/2) IC410(2/2) LPF IC407(1/2) LPF IC407(2/2) 3 RY301 13 75 13 CONTROL C DOLBY SECTION (Page 14) (Page 8) (Page 11) (Page 11) A POWER SECTION G DSP SECTION B POWER SECTION RELAY DRIVE Q301 MUTE Q302 MUTE Q303 MUTE Q304 MUTE Q354 S-VIDEO IN SW5 75 LINE AMP IC304 75 75 13 75 R CH is omi

38、tted Signal path : FM : PHONO : CD : VIDEO 3 2 1 7 5 6 10 9 4 8 11 1 2 6 7 10 9 11 8 4 131514 4 2 1413 16 1 13 15 9 11 3 5 7 8 16 14 10 2 4 6 32 10857 585660 97 62 61 81 82 83 80 3 5 13 4 6 2 14 10 15 1 7 3 13 5 15 1 7 14 10 4 6 2 3 2 8 7 27 26 24 23 4 5 1 25 6 22 3 2 131514 11 POWER SECTION STR-DB9

39、25 DATA RELAY DRIVE Q601 LIMITER Q504 VEE VCC IN MUT +VE NF -VE VCC POWER AMP(L) IC501 L +B -B LIMITER Q505 BOOSTER Q506 BOOSTER Q507 CUR DET Q508 PROTECTOR Q509,510 Q511 LIMITER Q604 VEE IN +VE NF -VE VCC POWER AMP(C/W) IC001 C +B -B LIMITER Q605 BOOSTER Q606 BOOSTER Q607 CUR DET Q608 LIMITER Q704

40、MUTE Q501,503 VEE VCC IN MUT +VE NF -VE VCC POWER AMP(SL) IC701 P RY ND 2 MD0 SINO SOTO UDATA UCLOCK UHREQ USREQ URESET LED VOL VOL DOWN VOL UP RDS DATA RDS CLK ANT LEV AMUTE VOL CE VOL CLK VOL DATA HP RY SL SP/A RY SP/B RY PROTECT C RY W RY SUR RY STOP +B -B LIMITER Q705 BOOSTER Q706 BOOSTER Q707 C

41、UR DET Q708 RY602 RELAY DRIVE Q546 RY501 RELAY DRIVE Q596 RY502 RELAY DRIVE Q645 RY601 RELAY DRIVE Q745 RY701 RELAY OVER LOAD SW Q609, 610, 709, 710 DRIVE Q544 Q611 RY503 RELAY DRIVE Q901 RY901 J501 C S(L) S(R) R CH R CH WIRELESS REAR SPEAKER CNJ701 CENTER WOOFER J701 PHONES TM701 FRONT SPEAKER TM50

42、1 R CH R CH POWER CONT IC901 DELAY +B SW Q902 SWITCH Q747,748 D801 SWITCH Q613,616 PROTECTOR Q547-549 D806 F2 F1 +5.6V F801 F802 D802-805 +B +32V -B IMPEDANCE SELECTOR 8 4 S501 D901-904 CNS901 AC IN AC OUTLET L R INW VCC +VE -VE +18V REG IC702 D+5V D+3.3V D+3.3V T901 POWER TRANSFORMAER D808 F803 F80

43、4 -15V REG +5V REG IC809 +24V -24V +15V REG +5V REG IC801IC8 +3.3V REG IC802IC8 +3.3V REG IC803 IC401 +12V REG IC403 +5V REG IC404 +15V +12V +5V IC402 -15V +5V T902 POWER TRANSFORMER SYSTEM CONTROL/ MODE CONTROL IC102 REMOTO CONTROL RECEIVER IC101 SIRCS Q101 FUNCTION KEY AUBUS-OUT U-DATA U-CLOCK U-H

44、REQ U-SREQ U-RESET LED VOL VOL DOWN VOL UP RDS DATA RDS CLOCK AD VERTION AUBUS-IN AD KEY IN2 AD KEY IN3 AD KEY IN4 AD KEY IN5 AD KEY IN6 LED MUTE FUNCTION-DOWN FUNCTION-UP SP-A SP-B POW-KEY IN LED FL DATA FL CLK FL LAT FL CLEAR SOT0 SIN0 MD0 MD2 MUTING D101 LED DRIVE Q102 S-LINK CTRL A1 J204 Q180 IN

45、/OUT BUFFER FUNCTION RV101 POWER S131 D100,104-106, D108-119,122 LED DRIVE Q103,104 106-119,122 I/R CONT IC181 I/O BUFFER Q182 RESET Q181 LAT X180 7.28MHz I/R DET IC180 LED DRIVE Q184,185 D184-186 REAR SPEAKER A INPUT SECTION (Page 10) F DSP SECTION (Page 8) B INPUT SECTION (Page 10) R CH is omitted Signal path : FM : CD 26 1313 +5V REG