Sony-STRK740P-rec-sm 电路图 维修手册.pdf

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1、STR-K740P/K840P US Model Canadian Model AEP Model UK Model E Model SERVICE MANUAL FM STEREO FM-AM RECEIVER Continued on next page SPECIFICATIONS Ver 1.2 2003. 09 Dolby Laboratories Licensing Corporation. “DOLBY” the double-D symbol ; “AC-3” and “PRO LOGIC” are trademarks of Dolby Laboratories Licens

2、ing Corporation. Photo : STR-K840P (SILVER model) Sony Corporation Home Audio Company Published by Sony Engineering Corporation 9-873-544-03 2003I16-1 2003.09 POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 8 ohm loads, both channels driven, from 40 20,000 Hz; rated 100 watts (STR-K840P only)/80 wa

3、tts (STR-K740P only) per channel minimum RMS power, with no more than 0.09 % total harmonic distortion from 250 milliwatts to rated output (Models of area code U only). Amplifier section POWER OUTPUT Models of area code U, CA Rated Power Output at Stereo Mode (8 ohms 40 Hz 20 kHz, THD 0.09 %) STR-K8

4、40P:100 W + 100 W STR-K740P:80 W + 80 W Reference Power Output (8 ohms 1 kHz, THD 0.7 %) STR-K840P:FRONT1):100 W/ch CENTER1): 100 W SURR1): 100 W/ch STR-K740P:FRONT1): 80 W/ch CENTER1): 80 W SURR1): 80 W/ch Models of area code CEL,CEK Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7 %) STR-K

5、840P:100 W + 100 W2) STR-K740P:80 W + 80 W2) Reference Power Output2) (8 ohms 1 kHz, THD 0.7 %) STR-K840P:FRONT1): 100 W/ch CENTER1): 100 W SURR1): 100 W/ch STR-K740P:FRONT1): 80 W/ch CENTER1): 80 W SURR1): 80 W/ch Models of area code AR, SP Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7 %

6、) STR-K840P:90 W + 90 W Reference Power Output2) (8 ohms 1 kHz, THD 10 %) STR-K840P:FRONT1): 120 W/ch CENTER1): 120 W SURR1): 120 W/ch Models of other area code Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7 %) STR-K840P:100 W + 100 W2) STR-K740P:80 W + 80 W2) Reference Power Output2) (8 o

7、hms 1 kHz, THD 10 %) STR-K840P:FRONT1): 120 W/ch CENTER1): 120 W SURR1): 120 W/ch STR-K740P:FRONT1): 100 W/ch CENTER1): 100 W SURR1): 100 W/ch 1) Depending on the sound field settings and the source, there may be no sound output. 2) Measured under the following conditions: Area codePower requirement

8、s E240 V AC, 50 Hz SP, CEL, CEK, AR230 V AC, 50 Hz MX120 VAC, 60 Hz STR-K740P/K840P are the tuner and the amplifier section in HT-DDW740/DDW840. RadioFans.CN 收音机爱 好者资料库 2 STR-K740P/K840P Inputs (Digital) DVD/LD (Coaxial) VIDEO 2 (Optical) Outputs MD/TAPE (OUT), VIDEO 1 (AUDIO OUT) SUB WOOFER Tone Ga

9、in levels:6 dB, 1 dB step FM tuner section Tuning range87.5 - 108.0 MHz Antenna terminals75 ohms, unbalanced Intermediate Frequency 10.7 MHz 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 distortio

10、n 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 1710 kHz6) With 9-kHz tuning scale:531 1710 kHz6) Models of area code E, AR, MX With 1

11、0-kHz tuning scale: 530 1610 kHz6) With 9-kHz tuning scale:531 1602 kHz6) Models of area code MY, SP, CEL, CEK With 9-kHz tuning scale:531 1602 kHz AntennaLoop antenna Intermediate Frequency 450 kHz Usable sensitivity50 dB/m (at 1,000 kHz or 999 kHz) S/N54 dB (at 50 mV/m) Harmonic distortion0.5 % (5

12、0 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 PRESET TUNING + and press . All preset stations will be erased when you change the tuning scale. To reset the scale to

13、 10 kHz (or 9 kHz), repeat the procedure. Video section Inputs Video:1 Vp-p, 75 ohms Outputs Video:1 Vp-p, 75 ohms Sensitivity: Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF) Sensitivity: Impedance: S/N: 100 dB (A, 20 kHz LPF) Voltage: 250 mV Impedance: 10 kilohms Voltage: 2 V Impedance: 1 kilohms G

14、eneral Power requirements Area codePower requirements U, CA, MX120 V AC, 60 Hz CEL, CEK230 V AC, 50/60 Hz MY, SP, AR220 230 V AC, 50/60 Hz E120/220/240 V AC, 50/60 Hz Power consumption Area codePower consumption U, MXSTR-K840P: 210 W STR-K740P: 180 W CASTR-K840P: 300 VA STR-K740P: 260 VA CEL, CEK, M

15、Y, SP,STR-K840P: 180 W E, ARSTR-K740P: 155 W Power consumption (during standby mode) 0.5 W Dimensions430 ? ? 145 ? ? 298 mm (16 7/8 ? ? 5 6/8 ? ? 11 6/8 inches) including projecting parts and controls Mass (Approx.)7.0 kg (15 lb 7 oz) Design and specifications are subject to change without notice. F

16、requency response MULTI CH IN3), CD, MD/TAPE, DVD/LD, VIDEO 1, 2 Inputs (Analog) MULTI CH IN3), CD, MD/TAPE, DVD/LD, VIDEO 1, 2 3) HT-DDW840 only 4) INPUT SHORT (with sound field and tone bypassed). 5) Weighted network, input level. 10 Hz 50 kHz +0.5/2 dB (with sound field, and tone bypassed) Sensit

17、ivity: 250 mV Impedance: 50 kilohms S/N4): 96 dB (A, 250 mV5) Abbreviation U: US model. CA: Canadian model. CEL: AEP model. CEK: UK model. SP: Singapore model. (Malaysia model included.) MX: Mexican model. MY: Malaysia model. AR: Argentine model. RadioFans.CN 收音机爱 好者资料库 3 STR-K740P/K840P SAFETY-RELA

18、TED 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. After corr

19、ecting the original service problem, perform the following safety checks 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 The AC leakage from any

20、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. Fol

21、low 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,

22、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 2V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT ATTENTION AU COMPOSANT AYANT RAPPORT LA SCU

23、RIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PISES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPMENTS PUBLIS PAR SONY. To Exposed Metal Par

24、ts on Set 0.15 F 1.5 k AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. 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

25、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 m

26、elts at a temperature about 40C 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 350C. Caution: The printed pattern (copper foil) m

27、ay peel away if the heated tip is applied for too long, so be careful! Strong viscosity Unleaded solder is more viscous (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 unleade

28、d solder but unleaded solder may also be added to ordinary solder. RadioFans.CN 收音机爱 好者资料库 4 STR-K740P/K840P TABLE OF CONTENTS 1. GENERAL 5 2. TEST MODE 6 3. DIAGRAMS 8 3-1. Circuit Board Location 8 3-2. Block Diagrams MAIN Section 10 DISPLAY/POWER Section 11 3-3. Printed Wiring Board DIGITAL Sectio

29、n 12 3-4. Schematic Diagram DIGITAL Section (1/2) 13 3-5. Schematic Diagram DIGITAL Section (2/2) 14 3-6. Printed Wiring Board MAIN Section 15 3-7. Schematic Diagram MAIN Section (1/2) 16 3-8. Schematic Diagram MAIN Section (2/2) 17 3-9. Printed Wiring Board DISPLAY Section 18 3-10.Schematic Diagram

30、 DISPLAY Section 19 3-11.Printed Wiring Board VIDEO Section 20 3-12.Schematic Diagram VIDEO Section 20 3-13.Printed Wiring Board POWER Section 21 3-14.Schematic Diagram POWER Section 22 3-15.IC Block Diagrams 23 3-16.IC PIN FUNCTION DESCRIPTIONS 25 4. EXPLODED VIEWS 27 4-1. Front Panel Section 27 4-

31、2. Chassis Section-1 28 4-3. Chassis Section-2 29 5. ELECTRICAL PARTS LIST 30 MODEL IDENTIFICATION BACK PANEL Parts No. MODELPARTS No. K740P : US4-238-189-2s K740P : Canadian4-238-189-3s K740P : Malaysia,Singapore4-238-189-4s K740P : E4-238-189-5s K740P : AEP4-238-189-6s K740P : UK4-238-189-7s K840P

32、 : US4-238-193-0s K840P : Canadian4-238-193-1s K840P : Malaysia, Singapore4-238-193-2s K840P : E4-238-193-3s K840P : AEP4-238-193-4s K840P : UK4-238-193-5s K840P : Argentine4-238-193-8s K840P : Mexican4-238-193-9s 5 STR-K740P/K840P SECTION 1 GENERALThis section is extracted from instruction manual.

33、g + 17452 3690qaqsqdqfqg qhqjqkqlw; waws8 FM MODE (Models of area code CEL, CEK only) ed, (Except for models of area code CEL, CEK) ef (32) INPUT MODE qg (22) IR (receptor) 4 (39, 46, 52) LEVEL 0 (16, 20, 28, 57) M MASTER VOLUME wd (20, 50) MD/TAPE qj (22) MEMORY eh (31, 33) MENU +/ e; (16, 28, 36,

34、37, 57) MENU ea (16, 28, 36, 37, 57) MODE wj (25, 30, 51) MULTI CHANNEL DECODING (indicator) (HT-DDW840 only) 7 (22) MULTI CH IN (HT-DDW840 only) qf (22) MUTING wf 8 (22, 50) N S NAME (36) PHONES (jack) ek (22, 51) PRESET/PTY SELECT +/ (Models of area code CEL, CEK only) 3 (33, 34) PRESET TUNING +/

35、(Except for models of area code CEL, CEK) 3 (33, 54) PTY (models of area code CEL, CEK only) ef (34) SET UP 6 (4, 16, 37, 57) SHIFT eg (33) SLEEP (HT-DDW740 only) qf (37) SURR qd (28, 57) T Z TREBLE +/ qh (30, 57) TUNER ws (22, 32, 33, 36) TUNING +/ 5 (32) VIDEO 1 qk (22) VIDEO 2 w; (22) BUTTON DESC

36、RIPTIONS ?/1 (power) 1 (4, 15, 20, 21, 30, 31, 54) ALPHABETICAL ORDER 0 9 2 CH wh (26) A D A.DEC wk (24, 26) AM (Except for models of area code CEL, CEK) es (31, 32) BASS +/ wg (19, 30, 57) CD ql (22) CINEMA STUDIO EX A, B, C 9 (25) Digital Cinema Sound (indicator) qs (24) DIMMER ej (23) DISPLAY 2 (

37、23, 34, 52) Display qa (23) DVD/LD wa (22) E L ENTER wl (36) FM (Except for models of area code CEL, CEK) ed (31, 32) FM/AM (Models of area code CEL, CEK only) es (31, 32) ekejeh eg ef ed es eae; wl wk wj whwgwfwd Abbreviation CEK: UK model. CEL: AEP model. 6 STR-K740P/K840P SECTION 2 TEST MODE FACT

38、ORY PRESET MODE * All preset contents are reset to the default setting. * Procedure: While depressing the VIDEO 1 and the 2CH buttons simul- taneously, press the power ?/1 button to turn on the main power. The message “FACTORY” appears and switch off the set. While depressing the VIDEO 1 and the 2CH

39、 buttons simul- taneously, press the power ?/1 button again. The message “FACTORY” appears and the present contents are reset to the default values. AM CHANNEL STEP 9 KHZ/10 KHZ SELECTION MODE * Either the 9 kHz step or 10 kHz step can be selected for the AM channel step. * Procedure: Set the FUNCTI

40、ON to AM. Turn off the main power. While depressing the TUNING+ button or the PRESET+ button, press the power ?/1 button to turn on the main power. Either the message “9 k STEP” or “10 k STEP” appears. Select the desired step. * For US/Canadian/E model only SPEAKER SIZE SELECTION MODE *Either Normal

41、 Speaker or Micro Satellite Speaker can be selected. *Procedure: While depressing the LEVEL button, press the power ?/1 button to turn the main power. Either the message “NORM. SP.” or “MICRO SP.” is displayed. Select the desired speaker size. FLUORESCENT INDICATOR TUBE TEST MODE * All fluorescent s

42、egments are tested. When this test is activated, all segments turn on at the same time, then each segment turns on one after another. * Procedure: While depressing the MD/TAPE and the SHIFT buttons simul- taneously, press the power ?/1 button to turn on the main power. 1.All segments turn on. MULTI

43、CHANNEL DECODING , Digital Cinema Sound , A.F.D. , MODE , 2CH and SET UP LED turn on. 2.Press the VIDEO button, confirm display. A.F.D. , MODE , LEVEL , SET UP , and Digital Cinema Sound LED turn on. 3.Press the VIDEO button, confirm display MULTI CHANNEL DECODING , 2CH , SURR and NAME LED turn on.

44、4.Press the VIDEO button, All segments turn off. 5.Every pressing of the VIDEO button turns on each segment and LED one after another in the same order. (Not only the VIDEO button, but also the other buttons such as DVD/LD , TV/SAT , MD/TAPE , CD , TUNER and AUX can be used.) SOUND FIELD CLEAR MODE

45、* 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: While depressing the MODE button, press the power ?/1 button to turn on the main power. The message “SURR. CLR.” appears and initialization i

46、s performed. DEMONSTRATION MODE * Demonstration is performed. * Procedure : While depressing the SET UP button, press the power ?/1 button. The message appears and demonstration is performed. * To finish DEMONSTRATION MODE, press the power ?/1 button while the introduction message appears in the dis

47、play. SOFTWARE VERSION DISPLAY MODE * The software version is displayed. * Procedure: While depressing the ENTER and the A.F.D buttons simultaneously, press the power ?/1 button to turn on the main power. The model name, destination and the software version are displayed. KEY CHECK MODE * Button che

48、ck * Procedure: While depressing the VIDEO 1 and the SHIFT buttons simultaneously, press the power ?/1 button to turn on the main power. “REST 39” appears. (AEP, UK, model: “RESET 38”) Every pressing of any button other than ?/1 and SPEAKERS counts down the buttons. The buttons which are already cou

49、nted once are not counted again. When all buttons are pressed “REST 00” appears. When MASTER VOLUME is rotated in clockwise direction, “VOL MIN”, “VOL 1” to “VOL 48”, “VOL MAX” appear. SW L SL CR SSR SLEEP SP.OFF ( ( ( L F E ) ) ) DIGITAL OPTCOAX MULTI CH IN PRO LOGICDTS MPEGSTEREOMONORDSMEMORY MUTINGINFONEWSTAEQD.RANGE DD dB kHz mft. MHz SW LR S SLEEP L F E COAX PRO LOGICMPEGSTEREORDS MUTINGINFOTAD.RANGE DD k m MHz SL C SR SP.OFF ( ( ( ) ) ) DIGITAL OPTMULTI CH IN DTSMONOMEMORY NEWSEQ dB Hz ft. 7