Sony-STRDB798-rec-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL FM STEREO FM/AM RECEIVER AEP Model UK Model Taiwan Model SPECIFICATIONS STR-DB798 Sony Corporation Audio Group Published by Sony Engineering Corporation This receiver incorporates Dolby* Digital and Pro Logic Surround and the DTS* Digital Surround System. * Manufactured under license

2、from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories. *“DTS” and “DTS Digital Surround” are registered trademarks of Digital Theater Systems, Inc. Continued on next page 9-879-775-01 2005G05-1 2005.07 Amplifier section Power Output Models of area

3、 code CEL, CEK, TW Rated Power Output at Stereo Mode (8 ohms 20 Hz 20 kHz, THD 0.09%) 100 W + 100 W1) (8 ohms 1 kHz, THD 0.7%) 110 W + 110 W1) (8 ohms 1 kHz, THD 10%) 135 W + 135 W1) Reference Power Output1) (8 ohms 20 Hz 20 kHz, THD 0.09%) FRONT2): 100 W/ch CENTER2): 100 W SURR2): 100 W/ch SURR BAC

4、K2): 100 W/ch (8 ohms 1 kHz, THD 0.7%) FRONT2): 110 W/ch CENTER2): 110 W SURR2): 110 W/ch SURR BACK2): 110 W/ch (8 ohms 1 kHz, THD 10%) FRONT2): 135 W/ch CENTER2): 135 W SURR2): 135 W/ch SURR BACK2): 135 W/ch 1) Measured under the following conditions: 2) Depending on the sound field settings and th

5、e source, there may be no sound output. Frequency response Inputs (Analog) 3) INPUT SHORT. 4) Weighted network, input level. Inputs (Digital) Outputs (Analog) Outputs (Digital) Equalizer Area codePower requirements AEP, UK 230 V AC, 50 Hz Taiwan110 V AC, 60 Hz PHONORIAA equalization curve 0.5 dB MUL

6、TI CH IN, SA-CD/ CD, MD/TAPE, DVD, TV/SAT, VIDEO 1, 2, 3 10 Hz 100 kHz +0.5/2 dB (when ANALOG DIRECT is selected) PHONOSensitivity: 2.5 mV Impedance: 50 k ohms S/N3): 86 dB (A, 2.5 mV4) MULTI CH IN, SA-CD/ CD, MD/TAPE, DVD, TV/SAT, VIDEO 1, 2, 3 Sensitivity: 150 mV Impedance: 50 k ohms S/N3): 96 dB

7、(A, 150 mV4) DVD, SA-CD/CD (Coaxial) Sensitivity: Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF) DVD, TV/SAT, MD/TAPE, VIDEO 3 (Optical) Sensitivity: Impedance: S/N: 100 dB (A, 20 kHz LPF) MD/TAPE (OUT), VIDEO 1, 2 (AUDIO OUT) Voltage: 150 mV Impedance: 2.2 k ohms SUB WOOFERVoltage: 2 V Impedance: 1

8、 k ohm MD/TAPE (Optical)Sensitivity: Gain levels10 dB, 1 dB step Ver. 1.0 2005.07 RadioFans.CN 收音机爱 好者资料库 2 STR-DB798 FM tuner section Tuning range87.5 - 108.0 MHz AntennaFM wire antenna Antenna terminals75 ohms, unbalanced Intermediate frequency10.7 MHz Sensitivity Mono:18.3 dBf, 2.2 V/75 ohms Ster

9、eo:38.3 dBf, 22.5 V/75 ohms Useable sensitivity11.2 dBf, 1 V/75 ohms S/N Mono: 76 dB Stereo: 70 dB Harmonic distortion at 1 kHz Mono: 0.3% Stereo: 0.5% Separation45 dB at 1 kHz Frequency response30 Hz 15 kHz, +0.5/2 dB Selectivity60 dB at 400 kHz AM tuner section Tuning range Models of area code AEP

10、, UK, Taiwan With 9-kHz tuning scale:531 1,602 kHz AntennaLoop antenna Intermediate frequency450 kHz 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 Hz) Selectivity At 9 kHz:35 dB Video section Inputs/Outputs Video:1 Vp-p, 75 ohms S-vid

11、eo:Y: 1 Vp-p, 75 ohms C: 0.286 Vp-p, 75 ohms COMPONENT VIDEO:Y: 1 Vp-p, 75 ohms PB/CB/B-Y: 0.7 Vp-p, 75 ohms PR/CR/R-Y: 0.7 Vp-p, 75 ohms 80 MHz HD Pass Through General Power requirements Power consumption Power consumption (during standby mode) 0.3 W Dimensions (w/h/d) (Approx.) 397 160 .5 430 mm i

12、ncluding projecting parts and controls Mass (Approx.)13.5 kg Supplied accessories FM wire antenna (1) AM loop antenna (1) Remote commander RM-AAP002 (1) R6 (size-AA) batteries (2) AC power cord (1) Design and specifications are subject to change without notice. Area codePower requirements AEP, UK AE

13、P, UK 230 V AC, 50/60 Hz Taiwan Taiwan 110 V AC, 50/60 Hz Area codePower consumption 290 W 520 W Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDEN

14、TIFIED 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 PUBLISHED BY SONY. RadioFans.CN 收音机爱 好者资料库 3 STR-DB798 TABLE OF CON

15、TENTS 7.EXPLODED VIEWS 7-1.Overall Section . 69 7-2.Back Panel Section . 70 7-3.Main Board Section. 71 7-4.Heat Sink Section . 72 7-5.Chassis Section. 73 7-6.Front Panel Section . 74 7-7.Panel Base Section . 75 8.ELECTRICAL PARTS LIST. 76 1.SERVICING NOTES.4 2.GENERAL.6 3.DISASSEMBLY 3-1.Disassembly

16、 Flow .7 3-2.Case .7 3-3.COMP-V Board.8 3-4.Back Panel Block .8 3-5.DIGITAL Board, A/V SYNC Board .9 3-6.STAY-5/AU-IN/VIDEO-AU/VIDEO/S-VIDEO/ SPK-A/SPK-B Board .9 3-7.MAIN Board Block . 10 3-8.MAIN Board. 10 4.TEST MODE. 11 5.ELECTRICAL ADJUSTMENTS. 12 6.DIAGRAMS 6-1.Block Diagram TUNER/VIDEO Sectio

17、n . 13 6-2.Block Diagram AUDIO DSP Section . 14 6-3.Block Diagram AUDIO CONTROL Section . 15 6-4.Block Diagram AUDIO AMP Section . 16 6-5.Block Diagram DISPLAY, KEY CONTROL Section . 17 6-6.Block Diagram POWER SUPPLY Section . 18 6-7.Printed Wiring Board DIGITAL Board (Component Side) . 20 6-8.Print

18、ed Wiring Board DIGITAL Board (Conductor Side) . 21 6-9.Schematic Diagram DIGITAL Board (1/4) . 22 6-10. Schematic Diagram DIGITAL Board (2/4) . 23 6-11. Schematic Diagram DIGITAL Board (3/4) . 24 6-12. Schematic Diagram DIGITAL Board (4/4) . 25 6-13. Printed Wiring Board A/V SYNC Board . 26 6-14. S

19、chematic Diagram A/V SYNC Board . 27 6-15. Printed Wiring Boards VIDEO Section . 28 6-16. Schematic Diagram VIDEO Section . 29 6-17. Printed Wiring Boards S-VIDEO Section . 30 6-18. Schematic Diagram S-VIDEO Section . 31 6-19. Printed Wiring Board COMP-V Board . 32 6-20. Schematic Diagram COMP-V Boa

20、rd . 33 6-21. Printed Wiring Board AU-IN Board . 34 6-22. Schematic Diagram AU-IN Board . 35 6-23. Printed Wiring Board MAIN Board . 36 6-24. Schematic Diagram MAIN Board (1/3) . 37 6-25. Schematic Diagram MAIN Board (2/3) . 38 6-26. Schematic Diagram MAIN Board (3/3) . 39 6-27. Printed Wiring Board

21、 A CLASS Board . 40 6-28. Printed Wiring Boards STAY Section . 41 6-29. Schematic Diagram A CLASS Section (1/2) . 42 6-30. Schematic Diagram A CLASS Section (2/2) . 43 6-31. Printed Wiring Boards SPEAKER Section . 44 6-32. Schematic Diagram SPEAKER Section . 45 6-33. Printed Wiring Boards DISPLAY Se

22、ction . 46 6-34. Schematic Diagram DISPLAY Section . 47 6-35. Printed Wiring Boards DC Section . 48 6-36. Schematic Diagram DC Section . 49 6-37. Printed Wiring Board AC Board . 50 6-38. Schematic Diagram AC Board . 51 RadioFans.CN 收音机爱 好者资料库 4 STR-DB798 MODEL IDENTIFICATION Back Panel PART No. Mode

23、lPART No. AEP model2-594-539-0 Taiwan model2-594-539-1 UK model2-594-539-4 UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due

24、to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Solderi

25、ng irons using a temperature regulator should be set to about 350 C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution n

26、ot 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. SECTION 1 SERVICING NOTES 5 STR-DB798 SERVICE POSITION clip clip AU-IN board (JW101) DIGITAL board (EB1101) COMP-V boar

27、d (JW300) When checking without back panel, it is necessary to connect the clip for GND to a chassis. -MAIN BOARD SERVICE POSITION- MAIN board rear panel COMP-V board DIGITAL board 6 STR-DB798 SECTION 2 GENERAL This section is extracted from instruction manual. Receiver A.F.D. qj Cover ws DIRECT qs

28、DISPLAY 9 Display 7 INPUT MODE q; INPUT SELECTOR qf IR (receptor) 1 MAIN MENU 4 MASTER VOLUME /+ qa MEMORY/ENTER 5 MENU 3 MOVIE qh MULTI CHANNEL DECODING (indicator) 8 MULTI CH IN qd MUSIC qg PHONES (jack) wg PRESET TUNING /+ wa PUSH wf SPEAKERS (OFF/A/B/A+B) wh SURR BACK DECODING ql TUNING /+ w; VI

29、DEO 3 INPUT (jacks) wd 2CH qk /+ 6 ?/1 (power) 2 ALPHABETICAL ORDER A - L M - Z NUMBERS AND SYMBOLS PUSH 2630874591 wawfwgwh wd wsw;qk qj qh qgqfqdqsql qa To remove the cover Press PUSH to remove the cover. When you remove the cover, keep the cover out of reach of the children. STR-DB798 7 Note: Fol

30、low the disassembly procedure in the numerical order given. 3-2.CASE This set can be disassembled in the order shown below. 3-1.DISASSEMBLY FLOW SECTION 3 DISASSEMBLY 3-2. CASE (Page 7) SET 3-3. COMP-V BOARD (Page 8) 3-4. BACK PANEL BLOCK (Page 8) 3-5. DIGITAL BOARD, A/V SYNC BOARD (Page 9) 3-6. STA

31、Y-5/AU-IN/VIDEO-AU/VIDEO/ S-VIDEO/SPK-A/SPK-B BOARD (Page 9) 3-7. MAIN BOARD BLOCK (Page 10) 3-8. MAIN BOARD (Page 10) 4case 3two screws (BVTP3 8) 2two flat head screws 1four flat head screws STR-DB798 8 3-3.COMP-V BOARD 3-4.BACK PANEL BLOCK 3two connectors (CN919, 3801) 2feeder fixed screw 5connect

32、or (CN3052) 6COMP-V board 3connector (CN168) 1two screws (BVTP3 8) 4 1wire (flat type) (15 core) (CN1103) 2two connectors (CN901, 902) (AEP, Taiwan) 7back panel block 4screw (BV3 8 CU) 4five screws (BV3 8 CU) 3eight screws (BVTP3 8) 3eight screws (BVTP3 8) 3seven screws (BVTP3 8) 5five screws (BVTP3

33、 10) 6two screws (BVTP4 8) STR-DB798 9 3-5.DIGITAL BOARD, A/V SYNC BOARD 3wire (flat type) (31 core) (CN1105) 6connector (CNS551) 5screw (BVTP3 8) 2 7DIGITAL board 9A/V SYNC board8A/V SYNC holder 1two connectors (CN402, 403) 4three connectors (CN107, 1110, 1112) qjtwo connectors (CN412, 413) 3screw

34、(PSW3 8) 1connector (CN178) qdconnector (CN408) q;connector (CN301) 7connector (CN202) 8connector (CN201) qsconnector (CN853) qfS-VIDEO board qaVIDEO board 9VIDEO-AU board 6AU-IN board qkSPK-B board qhSPK-A board 2STAY-5 board 4lead wire qgtwo connectors (CN448, 449) 5two connectors (CN102, 103) 3-6

35、.STAY-5/AU-IN/VIDEO-AU/VIDEO/S-VIDEO/SPK-A/SPK-B BOARD STR-DB798 10 3-7.MAIN BOARD BLOCK 3-8.MAIN BOARD 3four screws (BVTP3 8) 1connector (CN418) 4MAIN board block 1three connectors (CN907, 909, 910) 2four screws (BVTP3 8) 5five connectors (CN401, 421, 501, 601, 651) 4heat sink assy 3two screws (BVT

36、P3 8) 1Remove fourty two solders. 7MAIN board 6A CLASS board 2three connectors (CN18, 28, 38) 11 STR-DB798 TUNER FACTORY PRESET MODE All preset contents are reset to the default setting. Procedure: 1. While pressing the MUSIC and PRESET TUNING - buttons, press theI/1button to turn on the main power.

37、 2. The message “FACTORY” appears and the present contents are reset to the default values. TUNER AUTOBETICAL TUNING MODE (AEP and UK models) Procedure: 1. While pressing the MEMORY/ENTER button, press the I/1button to turn on the main power. 2. The message “AUTO-BETICAL SELECT” appears and scans an

38、d stores all the FM and FM RDS stations in the broadcast area. 3. When done, the message “FINISH” appears. SOUND FIELD CLEAR MODE The preset sound field is cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair. Procedure: 1. While pressi

39、ng the 2CH button, press theI/1button to turn on the main power. 2. The message “SF. CLR.” appears and initialization is performed. FLUORESCENT INDICATOR TUBE PATTERN CHECK MODE All fluorescent segments are tested. When this test is activated, all segments turn on at the same time, then each segment

40、 turns on one after another. Procedure: 1. While pressing the PRESET TUNING - and A.F.D. buttons, press theI/1button to turn on the main power. 2. All segments and MULTI CHANNEL DECODING indicator LED turn on. SHIPMENT MODE All preset contents are cleared when this mode is activated. Use this mode b

41、efore returning the product to clients upon completion of repair. Procedure: 1. While pressing the PRESET TUNING - and SURR BACK DECODING buttons, press theI/1button to turn ton the main power. 2. The message “CLEARING” appears and memories are reset to the default values and the main power turn off

42、 automatically. SWAP ALL MODE Procedure: 1. While pressing the PRESET TUNING + and A.F.D. buttons, press theI/1button to turn on the main power. 2. The message “SWAP” appears. COMMAND MODE CHANGE MODE The command mode of the remote-commander which this set receives can be changed. Procedure: 1. Whil

43、e pressing the INPUT MODE buttons, press the I/1but- ton to turn the main power. 2. Either the message “C.MODE.AV1” or “C.MODE.AV2” appears. Select the desired mode. VERSION CHECK MODE The version of the micro computer displayed. Procedure: 1. While pressing the PRESET TUNING - and 2CH buttons, press the I/1button to t