Sony-STRVX1L-rec-sm 电路图 维修手册.pdf

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1、FM tuner section Tuning range 87.5-108 MHz Antenna terminals 3O0 ohm balanced 75 ohm unbalanced Intermediate f requency 10.7 MHz Sensilivity at 46 dB quieting (at 40 kHz deviation) 4.0 sV (mono), 45 FV (stereo) Usable sensilivity IHF 2 ttV , 11 .2 dBt 1.6 sV (S/N = 26 ctB, 40 kHz devialion) Signal-t

2、o-noise ratio 69 dB (mono), 64 dB (stereo) Harmonic distortion 0.2% (mono), 0.3% (slereo), at 1 kHz Tuning range Antenna Intermediate frequency Usable sensitivily Harmonic distortion Selectivity LW 15O kHz-35O kHz Built-in ferrite rod antenna External antenna terminal 450 kHz 500 pvlm, built-in ante

3、nn (2 kHz) 100 sV, external antenna (23O kHz) 52 dB (50 mv/m) 0.3% (50 mv/m, 400 Hz) 35 dB (9 kHz) - Continued on page 2 - lM distortion Separation 0.2% (mono), 0.3% (stereo) 45 dB at I kHz Frequency response 40 Hz-12.5 kHz l? 5dB Selectivity at 300 kHz (at 40 kHz deviation, S/N = 26 clB) 40 dB capt

4、ure ratio 1.5 dB AM suppression ratio 48 dB lmage response ratio 45 dB Spurious response ratio 70 dB Muting threshold Approx. 5 gV Signal-to- noise ralio :. ra J r j ! j., :. i- .:i,. ;., j i. ;.,i,1!jri,lL l.; i . 1 .,i. i,.!1i. ;.lii.i li- i,ir;:i.itrlr!fu!li. I Xpl-ili-il:Ll ,.L!i.r. r:;i.; tit i

5、:-ir: ;,r1.ii i:, i rlj ,qilf ciii i i(j,rl : i Q !.4; : rlPi:PTrlli! lii:t j,1i. L rtli SL ll.,lPtNi: ti! ft:; ij:!| i r ! :,ili,it? ij:il i tl lx$i:;l: f AFr i lrti_li,igEflS Af,f:i:Aii: .i li!rltrr itr Iiiir:i turAirJi-!hl. Ol1 ltJ SUPFTLMIirfS t1l-;iiL : iiCi lri i ;il ffiOITY SPECIFICATIONS MWr

6、LW tuner soction 522 kHz-1,6O2 kHz 250 pV/m, builtin anlenna (1,000 kHz) 100 sV, external antenna (1,000 kHz) - I IIIIIL TIIIII IIII I IMICROFILM ISERIJICE MANUAL RadioFans.CN 收音机爱 好者资料库 sTR-vxl L Amplltlor sectlon Continuous RMS power output (less than 0.08% THD both channels drivn simultaneouslY)

7、at 20 Hz-20 kHz 22+22watls (8 ohms) at 1 kHz 25+ 25 watts (8 ohms) t .ording to DIN 45500 22 + 22 watts (8 ohms) Dynamic power output (lHF constant power supply meihod) 65 watts (8 ohms) Power bandwidth (lHF) 15 Hz-35 kHz Damping factor 30 at 1kHz, I ohms Harmonic distortion Less than 0.08% at rated

8、 outpul Less than 0.05% at 1 w output Intermodulation (lM) distortion (60 Hz: 7 kHz=4:1) Less than 0.08% at rated output Less than 0.05% at 1 w output Rssidual noise Less than O.05rW at 8 ohms Inputs Sensitivitylmpedances/N Wighting network 2.5 mv50 kilohms75 dBA APE15() mV50 kilohms90 dB A PHONO Me

9、asured with rated output power into 8 ohm loads (both channels driven simulianeously) at 1kHz. Tone controls RIAA equalization curve a0.5 clB TAPE 10 Hz-50 xnz l! oa BASS +8 dB at 1ff) Hz TREBLE +8 dB at 10 kHz Loudness control (att. 30 dB) +8 dB at 100 Hz Genorsl System Power requirements Power con

10、sumption AC outlets Dimensions Weight Superheterodyne FM/AM tuner, Direct coupled quasi-complementary symmetry power amplifier circuit (SEPP OTL) AEP model: 22OY ac lor 24O V ac adiustable by auihorized Sony personnel), 50/60 Hz AEP model: 75 W AEP model: One switched, 100 W Approx.43O x 105 x 315 m

11、m (w/h/d) (17 x 4%x 12%inches) incl. pro.iecting parts and controls Approx.6.2 kg (13 lb 11 oz) net Approx. 7.7 kg (17 lb) in shipping carton Accepts all low or high impedance headphones. 8-16 ohm speakers are suitable. Frequencyresponse PHONO -2- RadioFans.CN 收音机爱 好者资料库 5TR-VX| | SERVICING NOTE MEL

12、F (Metal Electrodes Face-Bonding) Components Warning If MELF components are forcibly removed from the printed circuit board with pincers or pliers, the circuit board pattern is likely to peel away. Always remove MELF components according to the procedure described on the next page. Replace MELF corn

13、ponents with the lead type components. 2. Color Code Reading lst color band (lst digit) MELF components are soldered directly to the surface of the printed circuit board. MELF resistors and capacitors have the same dimensions and are distinguished by their background colors: light brown for resistor

14、s, and pink or light green for capacitors. The MELF resistor color coding is the same as for conventional resistors, and MELF capacitor color coding is the same as for tube-type ceramic capacitors. Note, however, that all MELF resistors are rated at %W and + 57o. Components larger than resistors and

15、 without a color code are cross conductors, which are used instead of jumper wires. 1, Structure (Resistorsl resistorelement ceramic (carbon film) t insulation coat (epoxy) metal electrde kolder platedJ (Example of Resistorl light brown (background color) yellow : l0il2xt0. O: tz0000O : l20kO (Examp

16、le of Capacitorl background color red red : 2 2 orange : : , O at21 1g: pF = Z?OOO1F :0.ZZpF Fis.2 dielectric mel electrode bolder plated) Fig. I RadioFans.CN 收音机爱 好者资料库 sTR-vxl L 3. How to Remove MELF Components and Mount RePlacements Use a soldering iron of at least 40W with an iron tip 4 mm in di

17、ameter and file the tip down to the angle shown in the diagram Fig. 3 Use lead type resistors or capacitors to replace the MELF components These replacements may be mounted either with short leads (see Fig 5) or by covering a lead with tubing (see Fig 6) solder solder printed circuit board Pattern p

18、rinted circuit board Pattern Fig.5 printed circuit boarct printe-d circuit board Fig.6 4. 1. Bring the flat surface of equal contact with both component. the soldering iron in soldered ends of the 2. The solder should melt in about 4 seconds irn. -*tU., will melt more readily if a small amount of so

19、lder is attached to the iron tip and in.-ir. tip is placed against the component) Once the solder has melted tap the component l* *rn the tip of the soldering iron and remove it from the board Fig.4 4mm dia. STR-VXI z. F O U G G U. F TTJ a t) ts N 1-1. BLOCK DIAGRAM - TUNER SECTION - SECTION 1 OUTLI

20、NE (o o N ) =-= w G U o o O = U l o U L = rN J rJ = = sl o fo at o x O - = = :r U ) ,.: (ts c) O N o a U J ra, r o O - N F - _ =c) Eru g = = |r) tr) ) *t- E. =e o- = _ E*3 *=9 q F -: s3 (9 = z. f F -5- sTR-VX I L - AUDIO AMP SECTION _ t-1 t u l t z l t o l o t t t l l l u l c l E l Lr-l U F, r O u d

21、o o- U ts ) u ) o- + + + t l c o m c . F = = z =6og?,84 - 55-o58 4 L L U -6- STR-VX|. 2.1. DISASSEMBLY SECTION 2 DISASSEMBLY Note: Follow tho disassembly procedure in the numerical ordor giv6n. I TOP COVER AND FRONT PANEL Top Cover: O -O FrontPanel: O-O Remove LED (C) board from front panel. PROGRAM

22、.SENSOR UNIT Q Remove two screws (BVTT3 x 6l and light-guide board. Bmtove dial pointer from dial-pointer holder. Remove two screvc (BVTP3 x d. progrenr-sensor unit Remove four screws (BVTT3 x 6) from both sides of front panel. (A PuU o,ff atl knobs. Q Remove four top cover screws (4 x 8) from both

23、sides of top coven Remove a screw (BVTT3 x 6) from center of bottom front light-guide board installed from two hooks of the sub panel. -7- TUNER BOARD Remove connector from prograrn-sensor unit Note: When neconnecting te connector, Retnove Wo Remove two scnewt (BVTT3 x 6l frorn plastic Qor LED board

24、. from tuner circuit board. Open rear panel from top to bottom. Loosen wo screws (BVTT3 x d at both bottom- rear si des. o Remove two screws (TA, P3 x 8) :f, rcar panel Remove two re$ (BVTT3 x 6) Remove nut from band-tector sTR-VXI 2-2. DIAL.CORD STRINGING 4-864-41300 !nstall eYelet. o Apply locking

25、 compound here 7-623-616-01 Eyelet Assemble the dial cord. Crimp eyelet. Cord, dial by applying suitabte locking compound less than snn (7/g/) : Apply locking comqound here. Apply locking contpound here, excess of dial cord - ss than gmm (1/9) ! #, f ri the cord. dial-pointer holder Position the sma

26、!t hooking-ring end of the spring at this side. and install the spring on the dial pointer holder. OTie the excess of the dial cord (lOmm or six inches) - Oi on turn around the diatpointer holder and fix ie diat cord, spring and dialpointer holder together 4 Verify that the diat pointer moves to the

27、 right when- the TIJNING knob is turned clockwise and that the TUNtNG knob turns smoothlY E 0 . -8- srR-vxir SECTION 3 ADJUSTM ENTS Setting: MANUAL TUNING switch: ON Band Selector: FM MODE switch: MONO FM rf signal greneretor vrvM ,_, 4Tkstlml - REC OUT o Repeat the procedures in each adjustment sev

28、erl times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors FM FRONT.END BLOCK Adjustment is not necessary. But if it has been meddled with in some way, and if the adjustment is necessary by all means, adjust the FM front-end block as follows. FM F

29、REOUENCY COVERAGE ADJUSTMNT 1 l) Be sure to perform this adjustment before the FM frequency coverage adjust- ment 2. TUNING CONTROL VOLTAGE ADJUSTMENT Adjustment PartDial Indication VOM Reading RT2O5lowest frequency 2.8V RT20498MHz 8.0v RT2O3highest frequency 22.5V Adjust for a specifed reading on V

30、TVM O. Be sure to perform this adjustment FM frequency coverage adjustment 2. LOCAL OSCILLATOR FREOUENCY ADJUSTMENT Dial Indication Adjust for a maximum reading on VTVM O. Adjust for a maximum reading on VTVM O. FM FREOUENCY COVERAGE ADJUSTMENT 2 FM Rf Signal Generator Frequency 88MHz Adjust for a m

31、aximum reading on VTVM O. VOM (dc V) to jumper I tuner board sTR-VXl MANUAL TUNING switch: ON Band Selector: FM MODE switch: MONO TUNING: Detuned Position Procedure: Adjust the orange core (primary-side) of IFT20l for 0V dc reading on VOM. Note: When replacing the ceramic filter (CF201), perform thi

32、s alignment. tFT201 primary side (orange) FM DISCRIMINATOR ALIGNMENT 2 Setting: MANUAL TUNING switch: Band Selector: MODE switch: FM rf signal generator 0.01 pF FM antenna terminal REC OUT 75l. ( Carrier frequency 98MHz ) Output level: lmV (60d8) IModulation: 400H2,40kHzdeviation lto6) Procedure: Ad

33、just the black core (secondary side) of IFT20l for minimum distortion. 6g6 FM IF ALIGNMENT FM rf signal generator O.Ol pF FM antenna terminal REC OUT 755 ;y: 98MHz t2.5pv (22d8) 40OHz,40kHz deviation (1U)%) Setting: MANUAL TUNING switch: ON Band Selector: FM MODE switch: MONO Procedure: Adjust Tl fo

34、r maximum redding on the VTVM. o I tFT201 secondary side (blackl tuner board -10- a I o I o MUTING LEVEL ADJUSTMENT FM rf signal gtenerator FM antenna REC OUT terminal 75dt Carrier frequency: 98MHz Modulation: 400Hz,40kHz deviation Setting: MANUAL TUNING switch: ON MODE switch: STEREO hocedure: l. T

35、urn RT208 and stop it just when the VTVM indication suddenly increases. 2. If neiessary, turn RT208 fully clockwise and make sure that the VTVM indication increases when the output level of the FM rf signal generator is set to l6ttV (24d8). FM STEREO SEPARATION ADJUSTMENT Setting: MANUAL MUTING swit

36、ch: ON Band Selector: FM MODE switch: STEREO FM stereo signel generator L-CH Stereo separation: - R-CH Stereo separation: O - The difference between separations anO - are to be equal. FM antenna terminal REC OUT 75r rier frequency: 98MHz tput level: lmV (60dBl dulation: Audio UOHz): l6.25kHz deviati

37、on (40%) Pilot (l9kHz): 7.5kHz deviation (19%) Sub channel (38kHz): l6.25kHz deYiation H096) Procedure: FM stereo signal generator output channol VTVM connection VTVM reading (dBl L.CHL.CH R-CHL.CH Adjust RT20l for minimum reading. R.CHRH L.CHR.CH Adjust RT20l for minimum reading. ffiQ tuner board -

38、11- l6r*-rrxr L o I o I o l9kHz VCO ADJUSTMENT Setting: FUNCTION switch: TUNER Band Selector: FM MODE switch: STEREO A) Regular Method FM rf signal generator O.Ol 1tF FM antenna terminal 75A 98MHz lmv (60d8) no modulation Procedure: Adjust RT202 for l9kHz +50H2 on the frequency counter. B) Simple Me

39、thod l. Tune the set to the FM stereo broadcasting signal. 2. Turn R12O2 clockwise or counterclockwise and memorize the lighting-up ranges of STEREO lamp. 3. Secure RT202 at the center of the overlapped lighting-up range in both turning directions as shown below. freguency counter TP ffiffi9ffi tune

40、r board -12- STR.-VXl L FMsecroN I (1) Setting: to chassis MANUAL TUNING switch: Band Selector: AM rf signal gtenerator ON MW tuner board am board Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacit

41、ors. N +to jumper 4. MW TRACKING ADJUSTMENT Adjust for a maximum reading on VTVM . 1. AM IF ALIGNMENT Adjust for a maximum reading 3. MW FREOUENCY COVERAGE ADJUSTMENT REC OUT 2. AM TUNING VOLTAGE ADJUSTMENT Dial Indication -13- STR.VX I L Setting: MANUAL TUNING switch: Band Selector: ON LW LW TRACKI

42、NG ADJUSTMENT Adjust for a maximum readinq onVTVM. l45kHz Set dial pointer to lowest frequency. FREOUENCY COVERAGE +1. SGHEMATIC DIAGRAM - TUNER A i 030r a sEcTloN 4 DIAGRAMS sEcTtoN - t flrf I ITUNER BoARDI II r- IANTENNA BOARDI ! ; t FRorrr-END I rM20l I FilltN-fral t - l; lt*,F | i- l# *-: 2 8vil

43、 MtN)- 22.5VtfMAX) i r ) r i M N l . i 2 5 v ) i l M A X t0tA AM Vi KV t266 CT Ltv iilf!i tc30t LAt245 AM MIX,/AM IF MP/AM OET i:iii,iiIi:i:i:ii:ii:iiiii:i;:iiiiiiiiiiiiiliiii:i:iii|l:i:i:iiiiil:i :iili Note: The componon identified Uy shadins aiJ ,nri ,;i i1; lL -are crirical fo1 salety. Replace on

44、ly witfr iiii tii part number specified. iii iiil;:i:iii;:iii:iiii:i:ii:iiiiiiii|iiii.lii!iiiiii:iiii:ijiJiiiiiltiiiiii:ii:ii:i:i:il:ii.;ii:ii,:# NOTE FOR SCHEMATIC DIAGRAM e All capacitors are in pF unless otherwise no. 50WV or less are not indicated except for and tantalums, o All resistors are in

45、 ohms. 78W unless othe ktrl : lOOOn. MO : tOOOkO . |.: nonflammable resistor. ? f L 3 L 4 ? I I I I I - r | | g E l _ j s j o r l l v -16- Dzt2 tSt555rcr LAr23l F M I F l F M O E T T ffl C r l FM PROGRAIIII ON I 0Ft 0204 t2. 52-l nEilhl I TuriG I OFF t 0r : Ltitri. I i3l( jr,t lflldlrlf S()Irrv* roi

46、 M!. MW TRACK NG i600lH? l 7FM PROGRAM I lsvyll! IqARDI STR.-VXl I 0207,206 0208 0301 D3OIB Q.t0l tc40| 0.K rc30l 0203 tc20l tc202 0202 020 | 0204 0201 D2t2 tc202 LA33 6l rILED BoAR0 (C) srR.-vxl L IINDICATOR BOARD) frni ILED BOARD(B)I E POWER MP EOARO ro eoaao Oeo aomo ro eomo POVER AMP EOARD +3. M

47、OUNTING DIAGRAM _ AUDIO AMP SECTION - Refer to page 25 for replacement semicondustor and the note. I e I sTR-VXl L POWER AMP BOARD I IBREAKER BOAROI CONOUCTOR SIDE) TUI,IER EOARD 6 CNJ I FcirTLffl TUNTR EOARD (CONDUCTOR SIDE) fR-vxl L TUNER BOARD o- TUIER BOARO e- TUIlIR EOARD e ILAMP-R BOARDIILAMPt

48、 BOARDI (eo sonnol (CoNDUCToR SIDE) I rc eoano I (CONDUCTOR SIDE) I E 5TR-VXI L +4. SCHEMATIC DIAGRAM - AUDIO AMP SECTION _ B Iro aoanol lc50r NJM4560D EO AMP c5o2 on.!v tc5ot 3.3/25v ii- U- I ruruEn BOARDI s2-7-3 IIAPE I +- I PoWER AMp BoARI R65l C65l - o I -23- srR-vxl L rc60r il/2) sTK460 POWR AM

49、P ian-o I- -1 cB60r r.9 a -1 0f s7-2 s7 l5rwl sg-r I s9-3 r E J U E J I I s9-4 S9-2 | | tl ss *l ISPEAKERS 8l I _l ON L 15PrA(ER s TM 602 J60l lIEAoPHoNEsl - - l :I IFI :r-f_ _ J PL20t,202 t)tALl 8V O,3A , Note: The components identif ied by shadi .l:l I are critical for safety. Replac :t: Part number sPecified. -24- NOTE FOR MOUNTING DIAGRAM: o Color code of slewing over the end