Sony-STRK785-rec-sm 电路图 维修手册.pdf

SERVICE MANUAL Sony Corporation Home Audio Division Published by Sony Techno Create Corporation AEP Model E Model Australian Model MULTI CHANNEL AV RECEIVER 9-887-648-03 2007G16-1 2007.07 Ver. 1.2 2007.07 SPECIFICATIONS STR-K785 STR-K785 is the tuner and the amplifier section in HT-DDW785 and HTP-78DW. 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. Continued on next page Amplifier section Power Output1) Models of area code SP and SP6 Stereo mode (rated) (6 ohms 1 kHz, THD 1%) 70 W + 70 W Surround mode2) (reference) (6 ohms 1 kHz, THD 10%) RMS output FRONT: 100 W per channel CENTER: 100 W SURROUND: 100 W per channel Models of area code AUS Stereo mode (rated) (6 ohms 120 Hz 20 kHz, THD 0.09%) 50 W + 50 W Stereo mode (rated) (6 ohms 1 kHz, THD 1%) 85 W + 85 W Surround mode2) (reference) (6 ohms 1 kHz, THD 10%) RMS output FRONT: 122 W per channel CENTER: 122 W SURROUND: 122 W per channel 1)Measured under the following conditions: 2)Reference power output for front, center and surround speakers. Depending on the sound field settings and the source, there may be no sound output. Area codePower requirements SP, SP6230 V AC, 50 Hz AUS240 V AC, 50 Hz AEP230 V AC, 50 Hz Inputs AnalogSensitivity: 800 mV/ 50 kohms Digital (Coaxial)Impedance: 75 ohms Outputs (Analog) SUB WOOFERVoltage: 2 V/1 kohm Tone Gain levels6 dB, 1 dB step Reproduction frequency range: 28 20,000 Hz FM tuner section Tuning range87.5 - 108.0 MHz AntennaFM wire antenna Antenna terminals75 ohms, unbalanced Intermediate Frequency 10.7 MHz AM tuner section Tuning range Stereo mode (rated) (6 ohms, 1 kHz, THD 1%) 85 W + 85 W Surround mode2) (reference) (6 ohms, 1 kHz, THD 10%)RMS output FRONT:122 W per channel CENTER:122 W SURROUND:122 W per channel Models of area code AEP With 9-kHz tuning scale: 531 - 1,602 kHz AntennaLoop antenna Intermediate Frequency 450 kHz Video section Inputs/Outputs Video:1 Vp-p, 75 ohms COMPONENT VIDEO: Y: 1 Vp-p, 75 ohms PB/CB: 0.7 Vp-p, 75 ohms PR/CR: 0.7 Vp-p, 75 ohms 80 MHz HD Pass Through RadioFans.CN 收音机爱 好者资料库 2 STR-K785 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. 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 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. Soldering 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 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. 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 PUBLISHED BY SONY. About area codes The area code of the receiver you purchased is shown on the lower right portion of the rear panel (see the illustration below). Any differences in operation, according to the area code, are clearly indicated in the text, for example, “Models of area code AA only”. CENTERFRONT LR LR + Area code Abbreviation AUS: Australian model SP: Singapore model SP6: Singapore and Malaysia models General Power requirements Power consumption Power consumption (during standby mode) 0.3 W Dimensions (w/h/d) (Approx.) 430 145 300 mm including projecting parts and controls Mass (Approx.)7.5 kg Area codePower requirements AUS240 V AC, 50 Hz SP, SP6230 240 V AC, 50/60 Hz AEP Area codePower consumption 190 W SP, SP6170 W Design and specifications are subject to change without notice. 230 V AC, 50/60 Hz AUS/AEP Ver. 1.2 MODEL IDENTIFICATION Rear Panel Parts No. ModelPart No. SP and SP6 models2-662-452-3 AUS model2-662-452-4 AEP model2-662-452-5 RadioFans.CN 收音机爱 好者资料库 3 STR-K785 TABLE OF CONTENTS 1.GENERAL.4 2.TEST MODE. 10 3.ELECTRICAL ADJUSTMENT. 12 4.DIAGRAMS 4-1.Block Diagram MAIN Section . 14 4-2.Block Diagram DISPLAY/POWER Section . 15 4-3.Printed Wiring Board DIGITAL Board (Side A) . 16 4-4.Printed Wiring Board DIGITAL Board (Side B) . 17 4-5.Schematic Diagram DIGITAL Board (1/3) . 18 4-6.Schematic Diagram DIGITAL Board (2/3) . 19 4-7.Schematic Diagram DIGITAL Board (3/3) . 20 4-8.Printed Wiring Board MAIN Board . 21 4-9.Schematic Diagram MAIN Board (1/3) . 22 4-10. Schematic Diagram MAIN Board (2/3), HEADPHONE Board . 23 4-11. Schematic Diagram MAIN Board (3/3), ADCC Board, STANDBY Board . 24 4-12. Printed Wiring Boards ADCC Board, HEADPHONE Board . 25 4-13. Printed Wiring Board STANDBY Board . 26 4-14. Printed Wiring Board DISPLAY Board . 27 4-15. Printed Wiring Boards TUNING Board, POWER Board . 28 4-16. Schematic Diagram DISPLAY Board, TUNING Board, POWER Board . 29 4-17. Printed Wiring Board VIDEO Board . 30 4-18. Schematic Diagram VIDEO Board . 31 5.EXPLODED VIEWS 5-1.Front Panel Section . 39 5-2.Chassis Section. 40 6.ELECTRICAL PARTS LIST. 41 RadioFans.CN 收音机爱 好者资料库 4 STR-K785 SECTION 1 GENERAL This section is extracted from instruction manual. Front panel Receiver AUTO CAL MIC PHONES MEMORY FM MODETUNING+ PRESET TUNING VIDEO 1VIDEO 2DVDSA-CD/CDFMAM AMP MENUENTERMASTER VOLUME INPUT MODE + DISPLAYDIMMER 2CHA.F.D.MOVIEMUSIC ?/1 12 36 78 9 5 qjqkqlw;qgqhqfqaq;qsqd 4 NameFunction A?/1Press to turn the receiver on or off (page 23, 30, 31, 44). BDISPLAYPress to select information displayed on the display (page 50). CDIMMERPress to adjust the brightness of the display. DRemote sensor Receives signals from remote commander. EDisplayThe current status of the selected component or a list of selectable items appears here (page 6). F2CHPress to select 2CH STEREO mode (page 38, 44). GA.F.D.Press to select A.F.D. mode (page 41). NameFunction HMOVIE, MUSIC Press to select sound fields (MOVIE, MUSIC) (page 42). IMASTER VOLUME Turn to adjust the volume level of all speakers at the same time (page 28, 29, 30, 31). JENTERPress to store a station or enter the selection when selecting the settings (page 23, 26, 27, 32, 48, 49). KINPUT MODEPress to select the input mode when the same components are connected to both digital and analog jacks (page 49). LI/i/U/uAfter pressing AMP MENU (M), press I or i and U or u to select the settings. MAMP MENUPress to display the menu of the receiver. NInput buttonsPress one of the buttons to select the component you want to use. OPRESET TUNING +/ Press to select a preset station. PTUNING +/Press to scan a station. QMEMORYPress to store a station. RFM MODEPress to select FM monaural or stereo reception. SPHONES jackConnects to a headphone (page 55). TAUTO CAL MIC jack Connects to the supplied optimizer microphone for the Auto Calibration function (page 24). 5 STR-K785 MSLEEPLights up when the Sleep Timer function is activated (page 50). NPlayback channel indicators L R C SL SR S The letters (L, C, R, etc.) indicate the channels being played back. The boxes around the letters vary to show how the receiver downmixes the source sound. Front Left Front Right Center (monaural) Surround Left Surround Right Surround (monaural or the surround components obtained by Pro Logic processing) Example: Recording format (Front/ Surround): Dolby Digital 3/2.1 Sound Field: A.F.D. AUTO LCR SLSR SWLFE About the indicators on the display MEMORY LCR SLSSR SW LFESP STEREO MONOD.RANGESLEEP OPT COAX DIGITAL;DTS;PRO LOGIC II q;9qd qf qaqs 2143567 8 NameFunction A SWLights up when audio signal is output from the SUB WOOFER jack. B LFELights up when the disc being played back contains an LFE (Low Frequency Effect) channel and the LFE channel signal is actually being reproduced. C SPLights up when the receiver is turned on. This indicator does not light up if a headphone is connected to the PHONES jack. D ;DIGITALLights up when Dolby Digital signals are input. Note When playing a Dolby Digital format disc, be sure that you have made digital connections and that INPUT MODE is not set to “ANALOG” (page 49). E ; PRO LOGIC (II) “; PRO LOGIC” lights up when the receiver applies Pro Logic processing to 2 channel signals in order to output the center and surround channel signals. “; PRO LOGIC II” lights up when the Pro Logic II Movie/Music decoder is activated. Note Dolby Pro Logic and Dolby Pro Logic II decoding do not function for DTS format signals. NameFunction F DTSLights up when DTS signals are input. Note When playing a DTS format disc, be sure that you have made digital connections and that INPUT MODE is not set to “ANALOG” (page 49). G MEMORYLights up when a memory function, such as Name Input, Preset Memory (page 47), etc., is activated. H Preset station indicators Lights up when using the receiver to tune in radio stations you have preset. For details on presetting radio stations, see page 46. I Tuner indicators Lights up when using the receiver to tune in radio stations (page 45), etc. J D.RANGELights up when dynamic range compression is activated (page 33). K COAXLights up when INPUT MODE is set to “AUTO” and the source signal is a digital signal being input through the COAXIAL jack, or when INPUT MODE is set to “COAX IN” (page 49). L OPTLights up when INPUT MODE is set to “AUTO” and the source signal is a digital signal being input through the OPTICAL jack, or when INPUT MODE is set to “OPT IN” (page 49). 6 STR-K785 Rear panel * You can watch the selected input image when you connect the MONITOR OUT jack to a TV (page 17). 3 56 241 DVD IN DIGITAL OPTICAL VIDEO 2 IN VIDEO 1 IN COAXIAL SA-CD/CD AUDIO IN DVD AUDIO IN VIDEO 2 AUDIO IN VIDEO INVIDEO IN AM ANTENNA SURROUND SPEAKERS LR LR + CENTERFRONT LR LR + R L R L R L AUDIO OUT VIDEO 1 AUDIO IN VIDEO INVIDEO OUT SUB WOOFER MONITOR COMPONENT VIDEO DVD IN VIDEO 2 IN MONITOR OUT Y PB/CB PR/CR ADIGITAL INPUT section OPTICAL IN jacks Connects to a DVD player, etc. The COAXIAL jack provides a better quality of loud sound (page 18, 20). COAXIAL IN jack BANTENNA section FM ANTENNA jack Connects to the FM wire antenna supplied with this receiver (page 22). AM ANTENNA terminals Connects to the AM loop antenna supplied with this receiver (page 22). CVIDEO/AUDIO INPUT/OUTPUT section AUDIO IN jacks Connects the video and audio jacks of a VCR or a DVD player (page 15, 17, 18, 19, 20, 21). VIDEO IN/ OUT jacks* White (L) Red (R) Yellow DCOMPONENT VIDEO INPUT/ OUTPUT section COMPONENT VIDEO INPUT/ OUTPUT jacks* Connects to a DVD player, TV, or a satellite tuner. You can enjoy high quality image (page 17, 19, 20). ESPEAKERS section Connects to the speakers (page 14). Connects to the sub woofer (page 14). FAUDIO INPUT section AUDIO IN jacks Connects to a CD player, etc. (page 15). Green Blue Red White (L) Red (R) 7 STR-K785 You can use the supplied remote RM-AAU006 to operate the receiver and to control the Sony audio/video components that the remote is assigned to operate (page 51). Remote commander 123 46 78 0/10ENTER 9 SYSTEM STANDBY TV/VIDEO SLEEP AUTO CAL AV ?/1 VIDEO 1VIDEO 2DVDSA-CD/CD 2CHA.F.D. RETURN/EXIT TV CH PRESET TV CH + PRESET + TUNING TV TUNING + REPLAY ADVANCE MENU MOVIEMUSIC MEMORY DVD MENU CLEAR TOOLSDISPLAYMUTING TV VOL MASTER VOL FM MODE D.TUNING D.SKIP DUAL MONO TUNERAMP MENU TV ?/1 ?/1 - F Gg f . HmM Xx < 5 10/ 1 3 2 wf wg 5 6 7 8 q; 9 qs qd qf qg qj qk qh ql qa 4 w; wa ws wd NameFunction A AV ?/1 (on/standby) Press to turn on or off the Sony audio/video components that the remote is assigned to operate. If you press ?/1 (B) at the same time, it will turn off the receiver and other components (SYSTEM STANDBY). Note The function of the AV ?/1 switch changes automatically each time you press the input buttons (C). B TV ?/1 (on/standby) Press TV ?/1 and TV (P) at the same time to turn the TV on or off. ?/1 (on/standby) Press to turn the receiver on or off. To turn off all components, press ?/1 and AV ?/1 (A) at the same time (SYSTEM STANDBY). C Input buttons Press one of the buttons to select the component you want to use. When you press any of the input buttons, the receiver turns on. The buttons are factory assigned to control Sony components as follows. You can change the button assignments following the steps in “Changing button assignments” on page 51. D AMP MENUPress to display the menu of the receiver. Then, use V, v, B, b and to perform menu operations. E MOVIE, MUSIC Press to select sound fields (MOVIE, MUSIC). ButtonAssigned Sony component VIDEO 1VCR (VTR mode 3) VIDEO 2VCR (VTR mode 2) DVDDVD player SA-CD/CD Super Audio CD/CD player TUNERBuilt-in tuner 8 STR-K785 F DUAL MONOPress to select the language you want during digital broadcast. G FM MODEPress to select FM monaural or stereo reception. H D.TUNINGPress to enter direct tuning mode. D.SKIPPress to skip disc of the CD player or DVD player (multi- disc changer only). I ENTERPress to enter the value after selecting a channel, disc or track using the numeric buttons of the TV, VCR or satellite tuner. MEMORYPress to store a station. J DVD MENUPress to display the menu of the DVD player on the TV screen. Then, use V, v, B, b and to perform menu operations. K TOOLSPress to display options applicable to the entire disc (e.g. disc protection), recorder (e.g. audio settings during recording), or multiple items on a list menu (e.g. erasing multiple titles). L MUTINGPress to mute the sound. M TV VOL +*/ Press TV VOL +/ and TV (P) at the same time to adjust the TV volume level. MASTER VOL +*/ Press to adjust the volume level of all speakers at the sa