Sony-STR-DB780-Service-Manual电路原理图.pdf

SERVICE MANUAL FM STEREO FM-AM RECEIVER SPECIFICATIONS STR-DA1ES/DB780 Photo: STR-DA1ES Ver 1.0 2002.06 9-874-062-01Sony Corporation 2002F0500-1Home Audio Company C 2002.06Published by Sony Engineering Corporation US Model Canadian Model STR-DA1ES AEP Model UK Model E Model Chinese Model STR-DB780 Continued 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 registered trademarks of Digital Theater Systems, Inc. 1) Depending on the sound field settings and the source, there may be no sound output 2) Measured under the following conditions: Area codePower requirements SP, CEL, CEK230 V AC, 50 Hz TW110 V AC, 60 Hz 3) Measured under the following conditions: Area codePower requirements CN, KR220 V AC, 50 Hz Frequency response PHONO CD/SACD, MD/ TAPE, TV/SAT, DVD/LD, VIDEO 1, 2, 3 Inputs (Analog) PHONO MULTI CH IN, CD/ SACD, MD/TAPE, DVD/LD, TV/SAT, VIDEO 1, 2, 3 4) INPUT SHORT 5) Weighted network, input level Inputs (Digital) ASSIGNABLE COAXIAL IN (DVD/ LD CD/SACD) DVD/LD, TV/SAT, MD/TAPE (Optical) RIAA equalization curve 0 5 dB 10 Hz 100 kHz +0 5/2 dB (with sound field and equalizer bypassed) Sensitivity: 2 5 mV Impedance: 50 kilohms S/N4): 86 dB (A, 2 5 mV5) Sensitivity: 150 mV Impedance: 50 kilohms S/N4): 100 dB (A, 150 mV5) AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC DISTORTION: (Models of area code U only) With 8 ohm loads, both channels driven, from 20 20,000 Hz; rated 100 watts per channel minimum RMS power, with no more than 0.05 % total harmonic distortion from 250 milliwatts to rated output. 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 %) 80 W + 80 W Reference Power Output (8 ohms 20 Hz 20 kHz, THD 0 09 %) FRONT1):100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (4 ohms 20 Hz 20 kHz, THD 0 09 %) FRONT:1) 80 W + 80 W CENTER1): 80 W SURR1): 80 W + 80 W Models of other area codes Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0 7 %) 100 W + 100 W2) 90 W + 90 W3) (4 ohms 1 kHz, THD 0 7 %) 90 W + 90 W2) 80 W + 80 W3) Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF) S/N: 100 dB (A, 20 kHz LPF) Reference Power Output2) (8 ohms 1 kHz, THD 0 7 %) FRONT1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (4 ohms 1 kHz, THD 0 7 %) FRONT1): 80 W + 80 W CENTER1): 80 W SURR1): 80 W + 80 W (8 ohms 20 Hz 20 kHz, THD 0 09 %) FRONT1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W (4 ohms 20 Hz 20 kHz, THD 0 09 %) FRONT1): 75 W + 75 W CENTER1): 75 W SURR1): 75 W + 75 W RadioFans.CN 收音机爱 好者资料库 2 STR-DA1ES/DB780 Outputs MD/TAPE (REC OUT), VIDEO 1, 2 (AUDIO OUT) FRONT L/R, CENTER, SURROUND L/R, SUB WOOFER (Models of area code U, CA only) SUB WOOFER (Models of other area codes) EQ BASS:99 Hz1 0 kHz (21 steps) TREBLE:1 0 kHz10 kHz (23 steps) Gain levels:10 dB, 0 5 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 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 U, CA With 10-kHz tuning scale: 530 1,710 kHz6) With 9-kHz tuning scale:531 1,710 kHz6) Models of area code CN, SP, CEL, CEK, 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 Hz) Selectivity At 9 kHz:35 dB At 10 kHz:40 dB 6) You can change the AM tuning scale to 9 kHz or 10 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/Outputs Video:1 Vp-p, 75 ohms S-video:Y: 1 Vp-p, 75 ohms C: 0 286 Vp-p, 75 ohms COMPONENT VIDEO (Except for models of area code CEL, CEK): Y: 1 Vp-p, 75 ohms B-Y: 0 7 Vp-p, 75 ohms R-Y: 0 7 Vp-p, 75 ohms Voltage: 150 mV Impedance: 10 kilohms Voltage: 2 V Impedance: 1 kilohms Voltage: 2 V Impedance: 1 kilohms General Power requirements Area codePower requirements U, CA120 V AC, 60 Hz CEL, CEK230 V AC, 50/60 Hz CN, SP, KR220 230 V AC, 50/60 Hz TW110 V AC, 60 Hz Power consumption Area codePower consumption U280 W CA330 VA CEL, CEK290 W CN, SP, KR290 W TW290 W (MAX 500W) Power consumption (during standby mode) 0 5 W AC outlets Area codeAC outlets U, CA1 switched, 120 W/1A MAX SP, TW1 switched, 100 W MAX Dimensions430 161 400 mm including projecting parts and controls Mass (Approx.)12 5 kg Supplied accessories FM wire antenna (1) AM loop antenna (1) Models of area code U, CA; Remote commander RM-PP506L (1) R6 (size-AA) batteries (2) Models of other area codes; Remote commander RM-U305C (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 3 STR-DA1ES/DB780 Notes on chip component 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 original 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 exposed 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 the 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 analog 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 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! 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 NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. 4 STR-DA1ES/DB780 1.SERVICING NOTES.5 2.GENERAL.6 3.DISASSEMBLY 3-1.Disassembly Flow .7 3-2.Case (414535) .8 3-3.S-VIDEO board, VIDEO Board and Tuner.8 3-4.VIDEO.AU Board .9 3-5.DIGITAL Board .9 3-6.MAIN Board . 10 4.TEST MODE. 11 5.DIAGRAMS 5-1.Block Diagram TUNER/VIDEO INPUT Section . 13 5-2.Block Diagram AUDIO DSP Section . 14 5-3.Block Diagram AUDIO CONTROL Section . 15 5-4.Block Diagram POWER AMP Section . 16 5-5.Block Diagram DISPLAY/KEY CONTROL Section . 17 5-6.Block Diagram POWER SUPPLY Section . 18 5-7.Note for Printed Wiring Boards and Schematic Diagrams . 19 5-8.Schematic Diagram DIGITAL (1/3)/ V-3 OPT Boards . 21 5-9.Schematic Diagram DIGITAL Board (2/3) . 22 5-10. Schematic Diagram DIGITAL Board (3/3) . 23 5-11. Printed Wiring Board DIGITAL Board (Component Side) . 24 5-12. Printed Wiring Boards DIGITAL (Conductor Side)/V-3 OPT Boards . 25 5-13. Printed Wiring Board VIDEO Board . 26 5-14. Schematic Diagram VIDEO Board . 27 5-15. Printed Wiring Boards S-VIDEO/VIDEO 3/VIDEO.AU Boards . 28 5-16. Schematic Diagram S-VIDEO/VIDEO 3/VIDEO.AU Boards . 29 5-17. Printed Wiring Board MAIN Board . 30 5-18. Schematic Diagram MAIN Board (1/3) . 31 5-19. Schematic Diagram MAIN Board (2/3) . 32 5-20. Schematic Diagram MAIN Board (3/3) . 33 5-21. Printed Wiring Board BIAS Board . 34 5-22. Schematic Diagram BIAS Board . 35 5-23. Printed Wiring Boards H.P/PRE/SPOUT Boards . 36 5-24. Schematic Diagram H.P/PRE/SPOUT Boards . 37 5-25. Printed Wiring Board DISPLAY Board . 38 5-26. Schematic Diagram DISPLAY Board . 39 5-27. Printed Wiring Boards KEY/MUTING/POWER Boards . 40 5-28. Schematic Diagram KEY/MUTING/POWER Boards . 41 5-29. Printed Wiring Boards AC/DC 1/DC 2/PR 1/SEC 1 Boards . 42 5-30. Schematic Diagram AC DC 1/DC 2/PR 1/SEC 1 Boards . 43 5-31. IC Pin Function Description . 49 6.EXPLODED VIEWS 6-1.Case Section . 55 6-2.Front Panel Section-1. 56 6-3.Front Panel Section-2. 57 6-4.Chassis Section-1 . 58 6-5.Chassis Section-2 . 59 6-6.Chassis Section-3 . 60 6-7.Chassis Section-4 . 61 6-8.BIAS Board Section. 62 6-9.MAIN Board Section . 63 6-10. Foot Section . 64 7.ELECTRICAL PARTS LIST. 65 TABLE OF CONTENTS 5 STR-DA1ES/DB780 SECTION 1 SERVICING NOTES MODEL IDENTIFICATION Back Panel PART No. ModelPART No. DA1ES : US model4-240-601-0 DB780 : AEP and UK models4-240-601-1 DB780 : Singapore and Malaysia models 4-240-601-2 DB780 : Taiwan model4-240-601-3 DB780 : Korean model4-240-601-4 DB870 : Chinese model4-240-601-5 DA1ES : Canadian model4-240-601-6 Connect jig (extension cable J-2501-208-A) to the MAIN board (CN806, CN807) and DIGITAL board (CN1102, CN1103). Note:The power cord can be used unplugged from the back panel though, as it is hard to do it, it is easier to prepare other power cord and use it as a jig. DIGITAL board MAIN board power cord SERVICE POSITION In checking the DIGITAL board, prepare jig (extension cable J-2501-208-A: 200 mm 21 core). 6 STR-DA1ES/DB780 SECTION 2 GENERAL This section is extracted from instruction manual. + + + 12 345 67890qs qaqdqfqhqjqkqg ql w;waws wdwf whwl wk e;wgwjeaefesed AUTO DEC qs CINEMA STUDIO EX A/B/C qg Cursor buttons (/) wh CUSTOMIZE wl Digital Cinema Sound indicator 3 DIMMER ed DISPLAY ql Display 4 DOOR OPEN 7 ENTER wg EQ wj EQUALIZER e; FM/AM qf FM MODE es FUNCTION 6 INPUT MODE 9 IR receptor 2 Jog dial wf LEVEL wd MASTER VOLUME 5 MEMORY w; MODE +/ 0 MULTI CH DIRECT 8 NORMAL SURR (;PLII) qh PHONES jack qj PRESET TUNING +/ qd RDS PTY ea (28) (Models of area code CEL, CEK only) SET UP ws SLEEP ea (Except for models of area code CEL, CEK) SPEAKERS ON/OFF qk SURR wk TUNING +/ wa (Except for models of area code CEL, CEK) TUNING/PTY SELECT +/ wa (Models of area code CEL, CEK VIDEO 3 INPUT jacks ef 2CH ST qa ?/1 (power) 1 LOCATION OF CONTROLS Front Panel 7 STR-DA1ES/DB780 This set can be disassembled in the order shown below. 3-1.DISASSEMBLY FLOW SECTION 3 DISASSEMBLY SET 3-3. S-VIDEO BOARD, VIDEO BOARD AND TUNER (Page 8) 3-2. CASE (414535) (Page 8) 3-5. DIGITAL BOARD (Page 9) 3-6. MAIN BOARD (Page 10) 3-4. VIDEO.AU BOARD (Page 9) 8 STR-DA1ES/DB780 Note: Follow the disassembly procedure in the numerical order given. 3-2.CASE (414535) 3-3.S-VIDEO BOARD, VIDEO BOARD AND TUNER 1two flat head screws 1two flat head screws 1two flat head screws 1two flat head screws 3case (414535) 2 2 1connector (CN853) 4S-video board, video board 2wire (flat type) (11 core) (CN303) 5wire (flat type) (11 core) (except DB780: AEP, UK models) wire (flat type) (15 core) (DB780: AEP, UK models) 3six screws (BV/RING) 6three screws (BV/RING) 3two screws (BV/RING) (except DB780: AEP, UK models) 7tuner 9 STR-DA1ES/DB780 3-4.VIDEO.AU BOARD 1wire (flat type) (9 core) (CN201) 4video.AU board 2connector (CN202) 3two screws (BV/RING) 3screw (BV/RING) (DB780: AEP, UK models) 3-5.DIGITAL BOARD 1wire (flat type) (31 core) (CNS4) 2four connectors (CN1109, CNP5, CNP6, CNP9) 6five screws (BV/RING) 8digital board 7two connectors (CN1102, CN1103) 4bracket (digital 3) 5screw (BVTP3 8) 3screw (BVTP3 8) 3screw (BVTP3 8) Note:When installing the digital board (CNS4), connecting the wire (flat type) (31core) to the digital board beforehand improves the operatability. 10 STR-DA1ES/DB780 3-6.MAIN BOARD 3two screws (BVTP3 8) 3two screws (BVTP3 8) 4screw (BVTP3 8) 2five screws (BV/RING) 1three connectors (CN801, CN803, CN805) 1connector (CN902) 5 6connector (CN809) 7ten screws (transistor) 6five connectors (CN631, CN431, CN481, CN531, CN581) 9main board 8heat sink 11 STR-DA1ES/DB780 SOFTWARE VERSION MODE When this mode is used, the destination and the software version number are displayed. Procedure: 1.While pressing the ENTER and AUTO DEC. buttons, press the I/1button to turn on the main power. 2.The destination and the software version number appear