Sony-PSLX22-tt-sm 电路图 维修手册.pdf

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1、StLX?-*r,$JLVfi TYF :,$EF,.4, ,d*t. , K./Vlode/:, . $ Th* FtLX?2lU$ ean*dian mod*fi* srot,*up plied ,with, a *rtridg* ruhile,th* Pff,LX?2AEp, UK :madall,; Lp? $).: and LX2?8A ars cuppliedl rlYirh fin xl-.r5s cerrid$*,:ard,the F$.LX?SC,i* srip; : plied with a VL-5 cartridge. The PS-LXZ2A and LXl2BA,a

2、re not *ppli*d with.a dust gsyer. Turntable Platter Motor Drive system SPECIFICATIONS 30.4 cm (12 in.), aluminum-alloy diecast Linear torque BSL (brushless and slotless) motor Direct drive Control system FG servo control system Speed 331/: rpm,45 rpm Starting characteristics Comes to nominal speed w

3、ithin a half revolution (33r/3 rpm) Wow and f lutter 0.04% (WRMS)* 0.OSS% (WRMS) r0.0S% (DtN) Signal-to-noise ratio 72 dB (DlN-B) Tonearm Type Statically balanced Pivot-to-stylus length 216.5 mm (g% in.) Overhang 16.5mm (2thz in.l Stylus force adjustment range 0 - 3 g Cartridge shell weight 5.2 g (U

4、S, Canadian model) Cartridge weight range (including a cartridge shell) 7.5-12s -Continued on page 2- Note Appliance conforms with EEC Directive 76/889 regarding inter |III11 ferencesuppression. IITII III - * This new measuring method concerns only the turntable assembly, in- lVtlqlOIllvtl cluding t

5、he ptatter. tt 6xctudes wow and ftutter caused by the tonearm, the cartridge, or the record. Measured by obtaining signal from magnetic pick-up , , Q gg 6:$f6 s11, M odgf, f $.L X:38Ai B LAgl( TYr.f ,:, :,7$;p Modgl, ,.,P$,LXZZG: $l LVER, TYFE Canadi*inM$del, ffi-LXzaAh $,ILVE-H ?YPE AF Mod*f P;LX22

6、8:BLACKTTYPE AEF Mod*t $TEfif$. TlI HfiT $ffi $Y$TfTI, SAFETY.RE LATED COMPONENT WARN ING I I COMPONENTS IDENTIFIED BY SHADING AND MARK I oru rxe scHEMATrc DTAGRAMS AND tN rHE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN TH

7、IS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPOBT A la sEcunlrr LEs coMposANTs tDENTrnEs paR uNE TRAME ET UNE MARoue I sun LEs DrAGRAnarues scnE- MATrouEs, LEs vuEs expuosEes ET LA LtsrE oes pleces soNT cRtrlouEs pouR la sEcunrrd DE FONCTIONNEMENT. NE REMPLACER CES

8、coMposANTs ouE pAB oes prices soNy DoNT les ruumEnos soNT oonrvEs DANS cE MANUEL ou DANS ues supplemsNrs pueLtEs pAR soNy. SONY SER1JICE MANUAL RadioFans.CN 收音机爱 好者资料库 PS-LX2 2 iBiCi (A)/B(A) Cartridge XL-l50 (supplied only with the PS-LX22: AEP, UK Model, LX22lAl,and LX22B(A) Type Moving magnet typ

9、e Frequency response 10 Hz to 25kHz Channel separation 20 dB at 1 kHz Output voltage 3 mV at 1 kHz, 5 cm/sec. Load impedance 50 to 100 kilohms Tracking force 1 .3 to 2.3 S (1 .8 g recommended) Stylus Sony-ND-1SOG (Conical 0.6 mil diamond) Weight 8.8 s Cartridge VL-S (Supplied only with the PS-LX22C)

10、 Type Moving magnet.type Frequency response 10 Hz to 20 kHz Channel separation 2O dB at 1 kHz General Power requirements Power consumption Dimensions Weisht AEP model: 22OV ac UK model: 24OY ac US, Canadian model: 120 Vac,60 Hz 5W Approx. 430 x 1 10 x 355 mm (w/h/d) (17 x 43h x 14 in.) including pro

11、jecting parts and controls Approx. 4 ks (8 lbs 13 oz), net Approx. 4.3 kS (9 lbs 8 oz), in shipping carton Output voltage Load impedance Tracking force Stylus Weight 3.5 mV at 1 kHz, 5 cm/sec. 47 to 1OO kilohms 1.5 to 2.5 O (2.0 g recommended) Sony ND-SG (Conical 0.6 mil diamond) 5.0 s FEATURES o Th

12、e linear torQue BSL (brushless and slotless) direct drive servo motor has a high signal-to-noise ratio. o The low-mass tonearm and cartridge allow the stylus to track with greater accuracY. o The precise tracking force for the supplied cartridge is easy to set using a simple tracking force setting g

13、uide. (AEP, UK model) . Disc centering guides facilitate placing a 30 cm record over the center spindle. . The turntable has resilient feet that isolate the mechanism from exter- nal shock and vibration. MODEL IDENTIFICATION - Specification Label - * Servo PC Board There are 2 types of Servo PC Boar

14、d for PS-LX22. Former TypeNew Type Part No.1407-275-71t-607 -27 s-t3 AEP model: AC:22OY - 50/60H2 5W UK model: AC: 240V - 50/60H2 5W US, Canadian model: AC: 120V - 60Hz 5W PS-LX22B, LX22B(A) SONY, MoDEL No. PS-LX22B STEREO TURNTAELE SYSTEM AC.220V-50 /60H2 5W SERIAL NO. MADE IN JAPAN PS-1X22, LX22C,

15、 LX22( Al SONY. MoDEL No.PS -LX22 STEREO TURNTABLE SYSTEM I SERIAL NO. MADE IN JAPAN (PS-LX22B has new type only.) - 2- RadioFans.CN 收音机爱 好者资料库 Ps-Lx2 2lB/C/(A)/B(A) i I n SAFETY CHECK.OUT (US Mode!) After correcting the original service problem, perform the following safety check before releasing t

16、he set to the customer: Check the antenna terminals, metal titn,metaT)ized knobs, screws, aad 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

17、part having a return to chassis, must not exceed 0-5 mA (500 microampers). Leakage current can be measured by any one of three methods. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instru- ments. A battery-operated AC milliam

18、meter. The Data Precision 245 digltal multimeter is suitable for this job. RVl05 MAIN 3. Measuring the voltage drop 4cross a resistor by means of a VOM or battery-operated AC volt- meter. The limit indication is 0.75V, so analog meters rnust have an accurate low- voltage scale. The Simpson 250 and S

19、anwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2Y AC range are suitable. (See Fig. A) To Exposed Metal Parts on Set O.l 5 ttF AC voltmeter 0.75v) Fig. A. Using an AC voltmeter to check AC leakage. l. 2. /1 l I SECTION 1 OUTLI

20、NE 1-1. BLOCK DIAGRAM RVtOI GAII RVIOS OFFSET B+ ( l0.5vt a,l BSL_MOTOR STATOR ,-, -l (, IlPEEnl RV I07 45rpn ilig-J-*, a CARTRIDGE -3- RadioFans.CN 收音机爱 好者资料库 PS-LX2 2/B/c/(A)/B(A) 1.2. CIRCUIT DESCRIPTION MOTOR The method for detecting change inturntable rota- tion speed for the BSL (Brush and Slo

21、tless) DC servo motor on this set is different from the conventional method (detection by MG head fixed to the frame). On this set it is performed by the FG board fixed to the stator. Motor lnternal Diagram (upper surface) For this purpose, 256 poles of magnetization (SN alternately) are shallowly l

22、ayered on the surface of the drive magnetizer (8 poles alternately SN) on the magnet used to rotate the rotor. The frequencies detected at the FG board are: 331/t rpm-71.i nz 45 rpm- - -96.OHz (cross-section) FG burd Motor External View tworor Loil ServO Amp BOard External View of FG Board (with rot

23、or removed) shaft L2 (external flux noise negation pattern) -4- J PS-LX2 2 /B/C/(A)/B(A) ELECTROMOTANCE GENERATED ON FG BOARD On the FG board, if the radial pattern in Figure I is considered as one conductor, when the rotor rotates, the conductor cuts the magnetic flux, electro- motance is generated

24、 on the conductor, and its direction changes from the Flemings right-hand rule to that ia Figure 1. Overall, the spacing of the radial pattern on the FG board and the rotation speed detection sine-wave magnet peak is the same, so the electromotance generated in all of the patterns is directed in a u

25、niform direbtion as shown in Figure 2 rf. the pattern is considered as one loop. Therefore, the electromotance generated on the one pattern on the FG board has 256 poles worth of electromotance added. (circular integral method) FG Board Pattern Diagram (pattern surface) The frequencies detected on t

26、he FG board are ob- tained as follows. For one radial pattern, sine-wave electromotance is generated one time for 2 SN poles. Therefore, when the rotor rotates one time: 256 (Poles) +2= 128 (times) For 45 rotations: 128 (times) x 45 (rpm) + 60 (seconds) = 96 (Hz) In the same way, for 33% rotations:

27、128 (times) x 331/s (rpm) + 60 (seconds) = 7l.l (Hz) direction of current 6-Tn - conductor Fig.2 / magnet A A rotor roailon 1 * direction pttern E lectromotance direction for N pole. /1 for S pole magnet flux cutting direction electrcmotance T magnet pole movement magnet flux SONY l-607-27t-11 F-.,

28、Fig. 1 5- F lemings right-hand ru le PS-LX2 2/B/C/(A)/B(A) TURNTABLE REMOVAL Caution for installation: Move the clutch in the direction as shown by the arrowand put it the inside of the drive gear. clutch flQ recordsuide )ff BOTTOM BOARD REMOVAL SECTION 2 D ISASSEMB LY Note: r Follow the disassembly

29、 procedure in the numerical order given. . Be sure to note the parts placements/positionings of each other before disassembling them part. U -6- PS-LX2 2/B/C/(A)/B(A) tn SERVO AMP BOARD/STATOR ASSY/BOTOR ASSY REMOVAL i rotor Assy .r a; I O Turn the FG boatd in the direction as shown by the arrow and

30、 remove it. O I -_ I _.1 o ,1 nemove the FG board from the PC support. -/-:, - =e 1Z:l PC board holder tor Assy PCboard. bb Ac holder 6 -J o 8- lA PC board holder Ps-Lx2 2/B/C/(A)/B(A) ANTI.SKATING KNOB INSTALLATION If necessary, apply grease (SGL-501) to the specified portion. lnstail the spring on

31、 the IFC cam. tapping screw VZ fi l tuasher -4 I -z (Position the burred Z.l-/ side upwards.) .Z g, -/srins CAUTION: lnstall the spring so that the long side of the spring is located in the portion as shown by the afiow, stopper boss dl-.- /6K q$/to,s Olnstatt vasher lN ANTI.SKATING stopper boss ff1

32、f-*; ) on the Knob. 5 tll fiiffill I IFC cam f 1 LIFTER LEVER ASSY INSTALLATION lifter retainer apping screw ,-y11 If necessary, apply grease (SGL-501) to the specified portion. taPPn -_|_ uahser.- Y -(9 grease lscL-501) lifter lever Assy grease (sGL-501 ) apping screw greetse push (lnsa not t Assy

33、oush rod (lnstull tl not to be the push rod Assy be above the frame boss.) 6GL-501 ) 9- PS-LX2 2/B/C/(A)/B(A) MAIN LEVER INSTALLATION If necessary, apply grease (SGL-501) or silicon oil (viscosity: l00CS) to the specified portion. 6 avrpqxso grease (sGL-501 ) O Put this shaft in the groove of the dr

34、ive gear. spring (grease (SGL-501 groove of the drive gear Apply locking compound. grease ISGL-SOI ) spacer (position the burred side upwrds.) main lever Assy apping screw main lever retainer grease (SGL-501 ) silicon oil r (viscosity: l00CS) .w2 4 19 ) v 10- r/ PS-LX2 2 /B /C /(A) /B(A) - A pzxa AS

35、SEMBLING THE TONEARM reinforcement (A) ezxo neck cylinder (M) connector guide spring (B) phono leads t tinned-copper or piano wire pipe joint (M) PTT t.zx2 , ? - ry c4 U Pivot screw 4-6-* Pivot-screw lock nut tinned-copper or Piano wire + o 11 PS-LX2 2/B/C/(A)/B(A) TONEARM !NSTALLATION sotdr four ph

36、ono lead wires. Refer to the mounting diagram on pages 19,20. phono board 10 Rebend the shield plate. O plate. setscrew -C-r.u *. L wrench (Refer to the SwitchLever Positioning below.) spring , lead wire shietd Plate reaining ring, lO mm dia. (Position burred side upurards.) lnstall the return lever

37、 on the switch lever, v V return lever (B) :ztl i- =l By confirming the longer end of the anti-skting cam spring is touching to the protrusion (t nurk) of the frame, instalt the switch lever on the tone arm center shaft. m u V. tonearm Switch-Lever Positioning: 1. Place the tonearm on the tonearm re

38、st. 2. Position the drive gear to the rest mode. 3. Position the part A of the switch lever lmm off the microswitchs actuator as shown in the figure and tighten the set screw secuerly. switch tever a 12- microswitch v PS-LX2 2 /B/C/(A)/B(A) A l- LUBRICATION 1. When the motor Sony oil OL-2KA below. r

39、otor assy is replaced, apply to the rotor shaft as illustrated two drops rotor assy 2. . When rephcing the silicon oil (viscosity: lifter lever (D) or (E), apply 500CS) as shown below. lifter lever siticon oil (viseosity: 500CSl lifter lever (E) x lifter lever shaft J.Lubrication for push rod CAUTIO

40、N: When lubricating, rotate and move the push rod up and down a few times. lifter guide P 2.6XO : z of- push rod oil-retaining groove push-rod bearing one drop P 2.6X10 f silicon oil viscosityl L5O0,O00cs l - 13 - PS-LX2 2/B/C/(A)/B(A) 1. MECHANICAL ADJUSTMENTS SECTION 3 ADJUSTM ENTS Note: Before pe

41、rforming the adjustments, make a proper stylus-force setting, 1.8e (xL-1s0). g w u u, I I I ,i t Longitud inal Sensitivity Adjustment 1. Make the longitudinal balance adjustment of tonearm. 2. Repeating the following procedures, adjust the pivot screws and the lock nuts. a. When the 70 mg weight is

42、placed on the top of the sirell, the tonearm sinks more than 5 mm (%e ) measured at stylus-tip. b. When the weight is removed, the tonearm returns horizontally. Note: Adjust screws so that they protrude in the same amount. weight (70 mg) more than 5 mm (3ht) pivot screw pivot-screw lock nut -i- -= -

43、= =- -= r-u -r- I Automatic Return Position Adiustment 1. Reject the tonearm by REJECT button. 2. Bring the tonearm to the automatic-return test groove (inside portion) of the test record (YFSC-I6), and adjust the screw for making the tonearm return at count 3 to 12. Note: The normal auto-return pos

44、ition is between 59 mm (2-3/a) arrd 64 mm (2-1/2) from the cen- ter of the center shaft. Turning directionAutomatic return clockwiselate counterclockwiseearly hole for adiustment adjustment screw - 14- Vt PS-LX2 2/BiCl(A)iB(A) n ,4. tonearm lifrer Tonearm Height Adjustment Note: Perform both adjustm

45、ents A) and B). A) l. Bring the tonearm toward the inner of the record and put the stylus in the last gxoove of the record. 2. Push the REJECT button and slowly turn the turntable by hand to lift the tonearm. 3. Adjust the height of the tonearm lifter by turning the adjustment screw(A) so that the c

46、learance between the stylus tip and the record is approx. 6 mm (L/c) to l2 mm (Lt/t ). 4. After the adjustment, make sure by turning the turntable by hand that the tonearm smoothly returns to the tonearm rest. B) l. Make a lifter up mode by lifting up the cueing lever. 2. Bring the tonearm to the ou

47、ter-most record gtroove. Yith this condition, adjust the adjust- ment screw (B) so that the clearance between the stylus tip and the record surface becomes in 6 mm (3/rc) to 12 mm (rt/rr). 3. Move the tonearm to the inner-most groove. In this condition, the clearance between the stylus tip and the r

48、ecord surface should also be 6 mm (r/q) to l2 mm (lt/er). 4. The clearance difference between A) and B)-3 should be less than 4 mm (l/rc). 5. After the adjustment, lock the adjustment screw (B) with locking compound. cueing lever adiustment screw (B) cloc kwi se : c learan ce i ncrea ses cou n ter c

49、loc kwi se : c learan ce decrea ses tt. r: ;i! , il i : i, i fi = E E lE la = I E - 15 - Cartridge Level Adiustment Ioosen the two screws and adjust the position of the locking collar so that the point and point become horizontal. tt,0 screttus (PTT|.7) Note: Move the toneatm inside to just above the adiust- .ment hole in the frame. The two scrcws are accesr sible through the hole from the bottom side using a screwdriver. Ps-Lx2 2/B/C/(A)/B(A) I rn U v u -,1