Sony-STRK790-rec-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL Sony Corporation Home Audio Division Published by Sony Techno Create Corporation US Model Canadian Model AEP Model UK Model FM STEREO/FM-AM RECEIVER 9-887-542-02 2007C16-1 2007.03 Ver. 1.1 2007.03 SPECIFICATIONS STR-K790 STR-K790 is the tuner and the amplifier section in HT-DDW790 and

2、 HT-DDW795. 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

3、 trademarks of DTS, Inc. Continued on next page AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC DISTORTION: (Models of area code US only) With 6 ohm loads, both channels driven, from 120 20,000 Hz; rated 85 watts per channel minimum RMS power, with no more than 1% total harmonic distortio

4、n from 250 milliwatts to rated output. Amplifier section Power Output1) 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:133 W per channel CENTER: 133 W SURROUND: 133 W per channel Surround mode2) (reference) (6 ohms 100 Hz,

5、THD 10%) SUB WOOFER: 135 W 1)Measured under the following conditions: Area codePower requirements US, Canadian120 V AC, 60 Hz AEP, UK230 V AC, 50 Hz 2)Reference power output for front, center, surround speakers and sub woofer. Depending on the sound field settings and the source, there may be no sou

6、nd output. Inputs AnalogSensitivity: 800 mV/ 50 kohms Digital (Coaxial)Impedance: 75 ohms 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 M

7、Hz AM tuner section Tuning range Models of area code US, Canadian With 10-kHz tuning scale: 530 1,710 kHz4) With 9-kHz tuning scale: 531 1,710 kHz4) Models of area code AEP, UK With 9-kHz tuning scale: 531 1,602 kHz AntennaLoop antenna Intermediate frequency 450 kHz 4)You can change the AM tuning sc

8、ale to 9 kHz or 10 kHz. After tuning in any AM station, turn off the receiver. While holding down DIMMER, 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. General Power requirements Area codePower requireme

9、nts US, Canadian120 V AC, 60 Hz AEP, UK230 V AC, 50/60 Hz RadioFans.CN 收音机爱 好者资料库 2 STR-K790 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 sold

10、er 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 tempera

11、ture 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

12、 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 u

13、nleaded solder may also be added to ordinary solder. SAFETY CHECK-OUT After correcting the original service problem, perform the following 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

14、 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 thre

15、e 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 b

16、y 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 passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range a

17、re suitable. (See Fig. A) 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-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CR

18、ITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SON

19、T 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. Power consumption Power consumption (during standby mode) 0.3 W Dimensions (w/h/d) (Approx.) 429 145 308 mm (16 7/8 5 6

20、/8 12 1/8 inches) including projecting parts and controls Mass (Approx.)7.4 kg (16 lb 9 oz) Area codePower consumption US210 W Canadian290 VA AEP, UK220 W Design and specifications are subject to change without notice. RadioFans.CN 收音机爱 好者资料库 3 STR-K790 TABLE OF CONTENTS 1.GENERAL.4 2.TEST MODE. 10

21、3.ELECTRICAL ADJUSTMENT. 12 4.DIAGRAMS. 13 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 (1/5) . 18 4-6.Schematic Diagram D

22、IGITAL Board (2/5) . 19 4-7.Schematic Diagram DIGITAL Board (3/5) . 20 4-8.Schematic Diagram DIGITAL Board (4/5) . 21 4-9.Schematic Diagram DIGITAL Board (5/5) . 22 4-10. Printed Wiring Boards HDMI SW Board, HDMI BRIDGE Board (AEP, UK only) . 23 4-11. Schematic Diagram HDMI SW Board, HDMI BRIDGE Boa

23、rd (AEP, UK only) . 24 4-12. Printed Wiring Board MAIN Board . 25 4-13. Printed Wiring Board STANDBY Board . 26 4-14. Schematic Diagram MAIN Board (1/4) . 27 4-15. Schematic Diagram MAIN Board (2/4), STANDBY Board . 28 4-16. Schematic Diagram MAIN Board (3/4) . 29 4-17. Schematic Diagram MAIN Board

24、(4/4) . 30 4-18. Printed Wiring Board DISPLAY Board . 31 4-19. Schematic Diagram DISPLAY Board . 32 4-20. Printed Wiring Boards POWER Board, DCAC Board, HEADPHONE Board . 33 4-21. Schematic Diagram POWER Board, DCAC Board, HEADPHONE Board . 34 5.EXPLODED VIEWS 5-1.Front Panel Section . 42 5-2.Chassi

25、s Section. 43 6.ELECTRICAL PARTS LIST. 44 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

26、 of area code AA only”. FRONTCENTER LR LR SPEAKERS Area code Parts No. MODEL IDENTIFICATION Rear Panel ModelPart No. US model2-896-343-4 Canadian model2-896-343-5 AEP, UK models2-896-343-6 RadioFans.CN 收音机爱 好者资料库 4 STR-K790 SECTION 1 GENERAL Front panel Receiver VIDEO 1 IN/ PORTABLE AUDIO IN/ AUTO C

27、AL MIC PHONES INPUT SELECTOR A.F.D.MOVIEMUSIC ?/1 9q;qfqaqd 12 3 47658 qs DIMMERSLEEP2CH DISPLAY MASTER VOLUME AUTO CAL NameFunction A ?/1 (on/standby) Press to turn the receiver on or off. B DIMMERPress to adjust the brightness of the display. C SLEEPPress to activate the Sleep Timer function and t

28、he duration which the receiver turns off automatically. D 2CHPress to select 2CH STEREO mode. E DisplayThe current status of the selected component or a list of selectable items appears here. F DISPLAYPress to select information displayed on the display. G AUTO CALPress to activate the Auto Calibrat

29、ion function. NameFunction H MASTER VOLUME Turn to adjust the volume level of all speakers at the same time. I INPUT SELECTOR Turn to select the input source to playback. J Remote sensorReceives signals from remote commander. K MOVIE, MUSICPress to select sound fields (MOVIE, MUSIC). L A.F.D.Press t

30、o select A.F.D. mode. M PHONES jackConnects to a headphone. N VIDEO 1 IN/ PORTABLE AUDIO IN/ AUTO CAL MIC jack Connects to the supplied optimizer microphone for the Auto Calibration function. To connect a portable audio such as MP3 player, etc. 5 STR-K790 About the indicators on the display SWLFE LC

31、R SLSSR ;D;PLII;PLOPTDTSMEMORYRDS ST MONOD.RANGECOAX 12345687 qsqa9q; NameFunction ASWLights up when audio signal is output from the SUB WOOFER jack. BLFELights up when the disc being played back contains an LFE (Low Frequency Effect) channel and the LFE channel signal is actually being reproduced.

32、C; DLights up when the receiver is decoding Dolby Digital signals. D; PL/ ; PLII “; PL” lights up when the receiver applies Pro Logic processing to 2 channel signals in order to output the center and surround channel signals. “; PLII” lights up when the Pro Logic II Movie/Music decoder is activated.

33、 Note Dolby Pro Logic and Dolby Pro Logic II decoding do not function for DTS format signals. EOPTLights up when VIDEO 2 input is selected. However, “UNLOCK” appears on the display if no digital signal is input through the OPTICAL jack. NameFunction F DTSLights up when the receiver is decoding DTS s

34、ignals. G MEMORYLights up when a memory function, such as Name Input, Preset Memory, etc., is activated. H Tuner Indicators Lights up when using the receiver to tune in radio stations, etc. Note “RDS” appears for models of area code AEP, UK only. I Preset station indicators Lights up when using the

35、receiver to tune in radio stations you have preset. For details on presetting radio stations. J D.RANGELights up when dynamic range compression is activated. K COAXLights up when DVD input is selected. However, “UNLOCK” appears on the display if no digital signal is input through the COAXIAL jack. L

36、 Playback 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 surro

37、und components obtained by Pro Logic processing) Example: Recording format (Front/ Surround): 3/2.1 Sound Field: A.F.D. AUTO SWLFE LCR SLSR 6 STR-K790 US, Canadian models Rear panel * The numbers of the SUB WOOFER terminals varies depending on the models. 1243 SUB WOOFERSURROUND DVD IN DIGITAL OPTIC

38、AL VIDEO 2/ BD IN COAXIAL ANTENNA LR LR AM SA-CD/CD L R AUDIO IN TV AUDIO IN SAT AUDIO IN SPEAKERS FRONTCENTER LR LR SPEAKERS ADIGITAL INPUT section OPTICAL IN jack Connects to a DVD player, etc. The COAXIAL jack provides a better quality of loud sound. COAXIAL IN jack BANTENNA section FM ANTENNA ja

39、ck Connects to the FM wire antenna supplied with this receiver. AM ANTENNA terminals Connects to the AM loop antenna supplied with this receiver. C AUDIO INPUT section AUDIO IN jacks Connects to a CD player, etc. D SPEAKER section Connects to the speakers and sub woofer*. White (L) Red (R) AEP, UK m

40、odels * You can watch the selected input image when you connect the HDMI OUT jack to a TV or projector. VIDEO 2 /BD INDVD INOUT HDMI 123 4 DVD IN DIGITAL OPTICAL VIDEO 2/ BD IN COAXIAL ANTENNA AM SA-CD/CD L R AUDIO IN TV AUDIO IN SAT AUDIO IN FRONTCENTER LR LR SPEAKERS SURROUND SUB WOOFER LR LR SPEA

41、KERS ADIGITAL INPUT section OPTICAL IN jack Connects to a DVD player, etc. The COAXIAL jack provides a better quality of loud sound. COAXIAL IN jack HDMI IN/ OUT jacks* Connects to a DVD player, etc. The image and the sound are output to a TV or a projector. BANTENNA section FM ANTENNA jack Connects

42、 to the FM wire antenna supplied with this receiver. AM ANTENNA terminals Connects to the AM loop antenna supplied with this receiver. CAUDIO INPUT section AUDIO IN jacks Connects to a CD player, etc. DSPEAKER section Connects to the speakers and sub woofer. White (L) Red (R) 7 STR-K790 You can use

43、the supplied remote RM-AAU013 to operate the receiver and to control the Sony audio/video components that the remote is assigned to operate. RM-AAU013 Remote commander 123 46 78 0/10ENTER 9 SYSTEM STANDBY TV INPUT SLEEP AUTO CAL TV ?/1 AV ?/1 VIDEO 1VIDEO 2VIDEO 3DVD 2CHA.F.D. RETURN/EXIT TV CH PRES

44、ET 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 AMP MENU SATTVSA-CD/CDTUNER ?/1 - F Gg f . HmM Xx 5 10/ wd qj ql qk w; wa ws qg 1 3 2 6 7 8 q; 9 qf qs qa 4 5 qd qh NameFunction A TV ?/1 (on/stand

45、by) Press TV ?/1 and TV (O) at the same time to turn the TV on or off. 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

46、The function of the AV ?/1 switch changes automatically each time you press the input buttons (C). B ?/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. ButtonAssigned Sony component VIDEO 1VCR (VTR mode 3) VIDEO 2VCR (VTR mode 2) VIDEO 3Not assigned DVDDVD player SATSatellite tun