Sony-STRDB825-rec-sm 电路图 维修手册.pdf

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1、 1 MICROFILM AEP Model UK Model SPECIFICATIONS SERVICE MANUAL FM STEREO/FM-AM RECEIVER STR-DB725/DB825 Continued on next page Photo: STR-DB825 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 IN THE

2、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 capacitor

3、 may be damaged by heat. TABLE OF CONTENTS 1. SERVICING NOTE. 3 2. GENERAL. 4 3. DIAGRAMS 3-1. Circuit Boards Location. 5 3-2. Block Diagrams Main Section.7 Power Section .9 3-3. Schematic Diagram Video Input Section . 13 3-4. Printed Wiring Board Video Input Section .15 3-5. Schematic Diagram Input

4、 Section . 17 3-6. Printed Wiring Board Input Section . 19 3-7. Schematic Diagram S-Video Section . 21 3-8. Printed Wiring Board S-Video Section .23 3-9. Schematic Diagram Speaker Section . 25 3-10. Printed Wiring Board Speaker Section . 27 3-11. Printed Wiring Board Display Section .29 3-12. Schema

5、tic Diagram Display Section .31 3-13. Schematic Diagram Front Panel Section .33 3-14. Printed Wiring Board Front Panel Section .35 3-15. Schematic Diagram Power AMP Section . 37 3-16. Printed Wiring Board Power AMP Section . 39 3-17. Schematic Diagram Trans Section . 41 3-18. Printed Wiring Board Tr

6、ans Section .42 3-19. IC Block Diagrams .43 3-20. IC Pin Functions .46 4. EXPLODED VIEWS 4-1. Case and Back Panel Section. 48 4-2. Front Panel Section .49 4-3. Chassis Section .50 5. ELECTRICAL PARTS LIST. 51 Parts No. PARTS No.MODEL MODEL IDENTIFICATION BACK PANEL 4-900-493-0 4-900-493-1 DB725 DB82

7、5 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: While pressing the button and BASS BOOST button together, press the 1/u button to turn on the power. “FACTORY” will be displayed and factory settings execu

8、ted. INITIALIZATION Mode which erases all the preset settings of the unit. Use this mode when returning the unit to the customer. Procedure: While pressing the MEMORY button and MUTING button together, press the 1/u button to turn on the power. “ALL CLEAR” will be displayed and initialization execut

9、ed. FLUORESCENT INDICATOR TUBE AND LED LIGHTING CHECK Mode which lights up the whole fluorescent indicator tube or partially. Procedure: While pressing the button and BASS BOOST button together, press the 1/u button to turn on the power. The whole fluorescent display tube lights up. The fluorescent

10、display tube and LED light up in the following sequence each time the FUNCTION knob is rotated. KEY CHECK Mode for checking key input. Procedure: Turn on the power by pressing the 1/u button while pressing the button and the BASS BOOST button. “REST 25 KEY” is displayed. The count decreases each tim

11、e the button is pressed. Buttons counted once will not be couned again. “REST 00 KEY” is displayed when all the buttons are pressed. The fluorescent display tube: All light up LED: VIDEO 1 , VIDEO 3 , TAPE/MD , 5.1/DVD INPUT , MASTER VOLUME and SURROUND light Turn the FUNCTION knob Turn the FUNCTION

12、 knob Turn the FUNCTION knob Turn the FUNCTION knob The fluorescent display tube: Light up partially (1) LED: TV/LED , CD , PHONO , TONE , BASS/TREBLE and MASTER VOLUME light The fluorescent display tube: Light up partially (2) LED: VIDEO 2 , TUNER , BASS BOOST , INDEX , MASTER VOLUME and MUTING lig

13、ht The fluorescent display tube: All lights out LED: All lights out RadioFans.CN 收音机爱 好者资料库 4 Front Panel Descriptions SECTION 2 GENERAL LOCATION OF PARTS AND CONTROLS 11/u (power) switch 2DISPLAY button 3FM/AM button 4VIDEO 1 indicator 5VIDEO 2 indicator 6VIDEO 3 indicator 7TV/LD indicator 8TAPE/MD

14、 indicator 9Display window 10 CD indicator 11 SURROUND indicator 12 TUNER indicator 13 PHONO indicator 14 5.1/DVD INPUT indicator TONE indicator BASS BOOST indicator 15 MASTER VOLUME knob 16 MUTING button and indicator 17 FUNCTION knob 18 MODE switch 19 BALANCE knob 20 SOUND FIELD ON/OFF button 21 S

15、OUND FIELD MODE button 22 SOUND FIELD GENRE button 23 BASS BOOST button 24 TONE ON/OFF button 25 5.1/DVD INPUT button 26 BASS/TREBLE indicator 27 INDEX indicator 28 SET UP button 29 Digital Processing Controls 30 CURSOR MODE button 31 RDS EON button 32 RDS PTY button 33 VIDEO 3 INPUT AUDIO R conneco

16、t 34 VIDEO 3 INPUT AUDIO L connecot 35 VIDEO 3 INPUT VIDEO connecot 36 VIDEO 3 INPUT S-VIDEO connecot 37 TUNING + button 38 TUNING button 39 FM MODE button 40 MEMORY button 41 PRESET TUNING + button 42 PRESET TUNING button 43 SHIFT button 44 PHONES jack 45 SPEAKERS selector switch 78234651101113 14

17、15 129 45 26 2917181921222027283033343536 232425313237383940 4142 16 43 44 5 SECTION 3 DIAGRAMS 3-1. CIRCUIT BOARDS LOCATION SURR board S VIDEO board STANDBY (2) board DISPLAY board AMP board INPUT board SP board CONNECTOR board H.P board STANDBY board BALANCE board VIDEO board FUNCTION board SW boa

18、rd VIDEO (3) board SP SWITCH board VOLUME board REAR AMP board 8 STR-DB725/DB825 3-2. BLOCK DIAGRAMS MAIN SECTION 7 L 24 IF DATA KEY 4/SMETER FM AM FM 75 AM DO ASTOP TMUTE STEREO DATA CLK CE L OUT R OUT TUNER UNIT TUNER UNIT IS SUPPLIED AS THE ASSEMBLED BLOCK DO AUTO STOP TMUTE STEREO S DATA S CLK S

19、 LAT R CHR CH RDS : FM : CD Signal Path RCH is omitted PHONO LCD J201 LIN LREC OUT J202 LFRONT LREAR J203 WOOFER 5.1/DVD INPUT TAPE/MD M OUT1 J201 IN MONITOR J202 J203 5.1/DVD INPUT TV/LD VIDEO 2 OUT IN VIDEO 1 OUTOUT OUT V1 IN13 V1 OUT15 V2 IN9 V2 OUT11 TV3 LD5 8VEE 16VCC 14SW1 10SW2 2SW5 4SW3 6SW4

20、 32 VIDEO SELECT IC201 -5V REG IC202 -15V +5V : VIDEO 3 2 1 10 9 6 4 11 8 CONTROL CE 13 CLK 15 DI 14 AUDIO SELECT IC302 MUTE Q300 S LAT S CLK S DATA CONTROL EN 45 CLK 47 DATA 46 D LAT S CLK S DATA 31 LINE AMP IC404 9 L OUT S OUT C OUT 41 39 38 MATRIX DECODER IC401 DOLBY PROLOGIC 11 13 31 EQ AMP IC30

21、3 30 29 27 26 28 25 CONTROL LAT 13 CLK 15 DI 14 SELECTOR IC403 S LAT S CLK S DATA 20k L.P.F ADM 5k/7k L.P.F VOL/ MUTE DEC EN 4 CLK 2 DI 3 D LAT S CLK S DATA 22 20 PROCESSOR IC400 SURROUND SL OUT L OUT 24 23 22 MUTE SW Q411 3 2 1 31 MUTE Q304 57 MUTE Q305 IC306 IC304 IC305 L.P.F MUTE Q302 4 2 3 6 5 B

22、ASS TREBLE TONE CONTROL IC502 LEVEL SHIFT STB 10 CLK 8 DI 9 T LAT S CLK S DATA BOOST DET Q501,502 Q414 +5V RY301 RELAY DRIVE Q308 RV401 VOLUME RV402 BALANCE L C W SL A POWER SECTION M UP DOWN V-A2 SYSTEM CONTROL IC103(1/2) V-B3 V-E4 V INH27 09 21 AUTO STOP 23 STEREO 22 TUNER MUTE RDS DATA RDS CLK S

23、DATA S CLK S LAT DO AUTO STOP STEREO TMUTE 19 S DATA 1815 38 S CLOCK 20 S LATCH 9 D LATCH 17 T LATCH D LAT T LAT 30 RDS SM 52 VOL + 51 VOL 3 2 8 7 VOL MOTOR IC106 DOWN 6 S MUTE 49 BASS BOOST 41 DIRECT PASS LED SW Q108 LED SW Q143 D136 B POWER SECTION : PHONO CENTER J299 VIDEO LAUDIO VIDEO 3 INPUT V3

24、 IN7 1 7 10 9 4 11 CONTROL CE 13 CLK 15 DI 14 AUDIO SELECT IC300 S LAT S CLK S DATA 68 LTV/LD L J300 VIDEO2 AUDIO IN AUDIO IN LAUDIO OUT L VIDEO1 AUDIO IN L 31 LINE AMP IC301 BASS BOOST UP Y V1 O3 VIDEO 1 S-LINK CTRL A1 J204 LED DRIVE Q150 13 14 10 4 6 TV15 1 7 V1 I SW1 SW2 SW3 SW4V3 O M O Y SWITCH

25、IC252 C Y J252 VIDEO 1 Y C C Y C SWITCH IC251 C Y C J251 MONITOR J298 VIDEO 3 INPUT S-VIDEO TV/LD J253 J252 55VOL LED CTRL A1 OUT 36 IN/OUT BUFFER Q1101 CTRL A1 IN 37 J301 V1 O3 13 14 10 4 6 TV15 1 7 V1 I SW1 SW2 SW3 SW4V3 O M O 13 V1 I C Y 5.1/DVD INPUT S-VIDEO IN 3TV VA VB VC V INH SIRCS CTRL A1 P

26、 RY RDS DATA RDS CLK RDS SM 4 2 1413 RDS DECODER RDS DATA RDS CLK X450 4.43MHz IC452 16 S-VIDEO OUT AUDIO OUT AUDIO OUT VIDEO 9 10 STR-DB725/DB825 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) IC601 L +B B LIMITER Q505 BOOSTER Q506 BOOSTER Q5

27、07 CUR DET Q508 PROTECTOR Q509,510 Q511 LIMITER Q604 9 15 12 11 VEE IN +VE NF VE 13VCC POWER AMP(C/W) IC001 C +B B LIMITER Q605 BOOSTER Q606 BOOSTER Q607 CUR DET Q608 PROTECTOR Q609,610 Q611 LIMITER Q704 MUTE Q691,692 14 5 15 6 1 2 3 VEE VCC IN MUT +VE NF VE 13VCC POWER AMP(SL) IC701 SL +B B LIMITER

28、 Q705 BOOSTER Q706 BOOSTER Q707 CUR DET Q708 8 RY602 RELAY DRIVE Q546 RY501 RELAY DRIVE Q596 RY502 B A A+B OFF S155 SPEAKERS 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 SPEA

29、KER CNJ701 CENTER WOOFER J701 PHONES TM701 FRONT SPEAKER TM501 R CH R CH POWER CONT IC901 58 3 6 DELAY +B SW Q902 SWITCH Q747,748 D801 SWITCH Q613,616 PROTECTOR Q547-549 D806F2 F1 +5.6V F801 F802 D802-805 +B -B IMPEDANCE SELECTOR 8 4 S501 F901 F903 D901-904 DB825 CNJ909 CNP901 AC IN L R :FM :CD B MA

30、IN SECTION Signal Path RCH is omitted INW6 14VCC 2+VE 3VE 1 +18V REG IC702 3 T901 F803 F804 1 -15V REG 3 3 +5V REG 1 REG Q801 IC809 +24V -24V -30V 3 +15V REG 1 IC809 IC801 3 +12V REG 1 IC451 3 +5V REG 1 IC450 +15V +12V +5V IC803 -15V T902 SYSTEM CONTROL/ MODE CONTROL IC103(2/2) P RY A MAIN SECTION 8

31、 AC MUTE 44 FRONT RY 47 PROTECTOR 50 SP OFF 43 CENTER RY 45 MIX SUB RY 42 SUR RY 48POWER RY REMOTO CONTROL RECEIVER IC101 26SIRCS Q105 RESET Q101 10RESET Q102 X112 X211 X101 4.19MHz KEY1 33 FUNCTION KEY S102-S111 KEY2 32 FUNCTION KEY S115-122 KEY3 31 FUNCTION KEY S114, S125-130 MUTING LED 59 MUTING

32、D116 FUNCTION RV101 POWER S151 POWER 56 LED DRIVE Q103,104 TONE 60 SURR 61 INDEX 62 DIRECT PASS 58 5.1 INPUT 57 Q103,104 D111,135D115-113 TUNER 64 VIDEO1 70 MD/TAPE 66 PHONO 63 TV/DBS 67 131D124 CD 6571 78.80 8810089 FL101 FL TIBU F2F1 P1 17G1 12 09 39STOP I/R CONT IC102 I/O BUFFER Q106 RESET Q107 1

33、114 12 5 33 2 CTRL A1 LAT 28 1516 X102 7.28MHz I/R DET IC107 LED DRIVE Q129,130D101-103 VIDEO 3 68 VIDEO 2 69 CTRL A1 REAR SPEAKER RE B 54 RE A 53 11 THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For schemati

34、c 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. : internal component. 2 : nonflammable resistor. C : panel designation. U : B+ Line. V :

35、B Line. 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 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Waveforms are taken with a oscilloscope. Voltage variations may

36、 be noted due to normal produc- tion tolerances. Circled numbers refer to waveforms. Signal path. F: FM L: AUDIO g : VIDEO i : SURROUND d: PB (TAPE/MD) G: REC (TAPE/MD) p : Y l : CHROMA J: CD I : PHONO For printed wiring boards. Note: X : parts extracted from the component side. Y : parts extracted

37、from the conductor side. p: parts mounted on the conductor side. : internal component. b : Pattern from the side which enables seeing. Indication of transistor C These are omitted EB Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part

38、number specified. 1 2 IC103 ! X2 IC102 ! XOUT WAVEFORMS DISPLAY SECTION 7.28MHz 3.8Vp-p 4.19MHz 4.3Vp-p 13 14 STR-DB725/DB825 3-3. SCHEMATIC DIAGRAM VIDEO INPUT SECTION See page 43 for IC Block Diagrams. (Page 21) (Page 32) (Page 17) (Page 21) 15 16 STR-DB725/DB825 3-4. PRINTED WIRING BOARD VIDEO IN

39、PUT SECTION See page 5 for Circuit Boards Location. (Page 30)(Page 23) (Page 23) (Page 19) 17 18 STR-DB725/DB825 3-5. SCHEMATIC DIAGRAM INPUT SECTION See page 43 for IC Block Diagrams. (Page 32) (Page 14) (Page 37) (Page 31, 32)(Page 33) (Page 26) (Page 25) (Page 37) (Page 22) (Page 22) (Page 21, 22

40、) 19 20 STR-DB725/DB825 3-6. PRINTED WIRING BOARD INPUT SECTION See page 5 for Circuit Boards Location. Ref. No.Location Semiconductor Location D301D-7 D401F-8 D402E-10 IC001C-7 IC301D-5 IC302B-2 IC303C-2 IC304E-8 IC305E-7 IC306D-10 IC450B-11 IC451B-10 IC452F-1 IC502D-11 IC601B-7 IC701B-5 IC801B-9 I

41、C803B-10 Q300F-8 Q301E-8 Q302E-6 Q303E-5 Q304E-6 Q305D-6 Q411F-7 Q414E-11 Q501C-10 Q502B-10 Q551E-10 Q552E-11 Q691B-8 Q692B-8 Q3008D-6 (Page 15) (Page 39) (Page 27) (Page 27) (Page 40) (Page 35)(Page 24) (Page 30)(Page 30) (Page 24) (Page 24) 21 22 STR-DB725/DB825 3-7. SCHEMATIC DIAGRAM S-VIDEO SECT

42、ION See page 43 for IC Block Diagrams. (Page 14) (Page 14) (Page 18)(Page 18) (Page 18) 23 24 STR-DB725/DB825 3-8. PRINTED WIRING BOARD S-VIDEO SECTION See page 5 for Circuit Boards Location. (Page 19) (Page 19)(Page 19) (Page 15) (Page 15) 25 26 3-9. SCHEMATIC DIAGRAM SPEAKER SECTION See page 43 fo

43、r IC Block Diagrams. STR-DB725/DB825 (Page 38) (Page 37) (Page 37) (Page 31) (Page 41) (Page 38) (Page 31) (Page 18) (Page 18) 27 28 3-10. PRINTED WIRING BOARD SPEAKER SECTION See page 5 for Circuit Boards Location. STR-DB725/DB825 (Page 29) (Page 19)(Page 39) (Page 39) (Page 42) (Page 29) (Page 40)

44、 (Page 19) (Page 39) 29 30 3-11. PRINTED WIRING BOARD DISPLAY SECTION See page 5 for Circuit Boards Location. STR-DB725/DB825 (Page 35) (Page 36) (Page 28) (Page 27) (Page 40) (Page 19)(Page 19) (Page 15) (Page 35) (Page 36) Ref. No.Location Semiconductor Location D101C-3 D102C-2 D103C-2 D104C-2 D10

45、5C-2 D106D-2 D107D-10 D108E-10 D111C-10 D117C-11 D119D-2 D120D-2 D121E-2 D124D-9 D125D-3 D126D-10 D127D-7 D128D-6 D129D-4 D130D-8 D131D-5 D135C-10 D136C-10 D151E-3 D152E-3 D153E-4 D154E-4 D184D-11 D1101C-2 IC101C-10 IC102B-3 IC103C-7 IC106D-11 IC107B-2 Q101E-2 Q102E-2 Q103D-10 Q104D-10 Q105C-10 Q106

46、C-1 Q107C-3 Q108C-11 Q129C-2 Q130C-2 Q150D-11 Q413C-11 Q1101C-1 31 32 3-12. SCHEMATIC DIAGRAM DISPLAY SECTION See page 11 for Waveforms. See page 46 for IC Pin Function. STR-DB725/DB825 (Page 34) (Page 26) (Page 38) (Page 26) (Page 17,18) (Page 14)(Page 17) (Page 34) (Page 34) (Page 33) 33 34 3-13. SCHEMA