Akai-GX230D-tape-sm维修电路原理图.pdf
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1、I$nUEEillAilljALPAHT$LilSTruAKAI STEFIEC TAPE trIEGMG.ELGlX-?3cltrIALScl APLICAEILE TtrI McltrlEL GX-E3clRadioFans.CN 收音机爱 好者资料库ISTtrREO TAPE DECI(IODEL GX.23OD,LSO .PPLICABLE TO IODEL GX.30SECTION I SERVICE MANUALSECTION PARTS LISTSECTION 3 SCHEMATICDIAGRA .I23.tlRadioFans.CN 收音机爱 好者资料库ISECTION ISE
2、trIVICE MAIITJALTABLE OF CONTETSI SPECIFICATIONSII. DISINTLING OF UNITIII. .RR-,NGENENT OF TAIN PARTSIV. fECHANISN ADJUSTIIIENTI. .DJUSTf ENT OF PINCH HEEL PRESSURE. BRAKE TENSION ADJUSTIENT3. .DJUSTENT OF REEL TABLE HEIGHT.I. .DJUSTIvENT oF CAPSTAN oToR SHAFT LooSE PL.Y.i. .DJUSTIENT OF II,IPEDANCE
3、 ROLLER SHAFT LOOSE PLAY ,6. HEIGHT .DJUSTMENT OF TAPE GUIDE ON TENSION .RM: .DJUSTIENT OF TENSION ARN f ICROSWITCH SW-9 POSITION . .8. .DJUSTIENT OF RECORDING SLIDE SWITCH (SW-IO) TIING.9. .DJUSTillENT oF FF MICRoSwITCH (SW.-s) .CTUAToR PoSITION10. .DJUST ENT oF PLAY ilcRoswtrcH (sw-r nd SW-il r.CT
4、IVATOR POSITION. HEAD .DJUSTENTVI. .IPLIFIER SYSTEM ADJUSTIIENTI POER SUPPLY VOLTAGE ADJUST,ENT:. TPE SPEED ADJUSTNENT .3 RECORDING. PLAYBACK AMPLIFIER .DJUSTIENTVII. D.C. RESISTANCE OF VARIOUS COILSVIII. CLASSIFICATION OF VARIOUS P.C. BOARDSI. P C. BOARD INTERCIIANGE,BILITY CIIART COIPOSITE VIEWS O
5、F (OIPONETS:r.i ir:lc.idJusincnts. ntc.lsLlnng ntetltods. lnd opc:-,l:ltg prlltelDics. rcfer lt.r(;EER.L OPER. f IN(; IRINCIPI-ES .D ,I)JLS fIENTSl-t677l99t0l0illlt2lz3l5t5t5l6l7l7l7l8RadioFans.CN 收音机爱 好者资料库II. SPECIFICATIONSAn astersk next to a figure indicates the minimum guaranteed performance.TR
6、ACK SYSTEMi 4 track 2 channei stereo svstemTAPE SPEED7-ll2 and 3-314 ips. x0.7%*l-ll2 ips. (19 crn/sec.) xl.Mo*3-3l4 ips. (9.5 cmlLess than 0.07% RMS. at 7-ll2iPs.Less than 0.i% RMS. at 3-3/4 ips.*Less than 0.l0Vo at 7-Il2 iPs. FWD*Less than 0.I2% atl-ll2 ips. REV* Less than 0.15% at 3-3 4 ips. FWD*
7、Less than 0.l8Vo at 3-3/4 iPs. REV*Less than 0J2% at 7-ll2 ips.*Less than 0.I8% at 3-314 ips.30 to 23,000 Hz t3 dB at 7-ll2 ips. lwith Akai LN Tapel30 to 19,000 Hz t3 dB at 3-314 ips. (with Akai LN Tape)30 to 22.000 Hz t3 dB at 7-ll2 ips.30 to 18.000 Hz t3 dB at3-314 iLess than 1.07oLess than 1.5% a
8、t 7-ll2 ips.WOW & FLUTTERTOTAL WOW & FLUTTERFREQUENCY RESPONSEDISTORTIONTOTAL DISTORTIONLess than 25% at 3-314 iSiN RATIOBetter than 54 dB*Better than 50 dBTOTAL S/N RATIO*Better than 45 dBOUTPUTLINE 0.775V (0 t I dB/O t 1.5 dB. FWD/REV)DIN700 Hz 0 VU Prerecorded tape, output volume maximum0.5vINPUT
9、MICLINEDINf ore than 0.3 mVMore than 70 mVMore than 3 mVRECORDING/PLAYBACK LEVELCROSS TALKERASE RATIORECORDING BIAS FREQUENCYBTAS LEAKHIGH FREQUENCY DEVIATION(at 0 VU output, recording volume maximum),0.775V (0 t 1.5 dB)Better than 40 dB(1,000 Hz +3 VU recordiBetter than 70 dB(1,000 Hz +3 VU recordi
10、ng)100 t 10 kHzBetter than -30 dBWithin 3 dB(8,000 Hz. 3-314 ipt. ta90 minutes. stereo recording, using a 1,800 ft. tape at 7-ll2 ipsRECORDING TIMEFAST FORWARD AND REWIND TIMEApproxrmately 120 seconds, using a 1.800 ft. tape 1!9 FIz.IOTORMAIN MOTORREEL IOTOR2 speed A.C. Servo Conuol Outer Rotor Moto
11、rType: SCM2-24K1,4 poleRevolutions: 6 l5 r.p.m. at 7Ll2 ips.(19 cm/sec.)307.5 r.p.m. at 3-314 iPs.(9.5 cmisec.)Two 6-pole eddy current Outer Rotor MotorsType: 24XGMRRevolutions: 930 r.p.m. at 50 HzHEAD COMBINATION RECORDING/ERASE HEAD| 1,120 r.p.m. at 60 HzType: RE4-6Gap: Rec: 4Erase: Double GaPlmpe
12、dance:Rec: i,400 ohmt25% at 100 kHzErase: 130 ohm t7% at lO0klzD.C. Resistance: Rec: 5.5 ohmErase: 1.8 ohmType: P4-202Gap: 1.7r t0.51Impedance: 1,400 ohm at I kHzD.C. Resistance: 268 ohmPLAYBACK HEADRadioFans.CN 收音机爱 好者资料库ITRANSISTOR2SA564(PXQ) . . i2SC4s8LG(C).162SC945(PXO. . . 202SC1247A. I2SD361(
13、DXE).12SD361(DlXD2).1TlP48. . . 1DIODE1N34A.210D05.4toDl . I10D2.+15-1588. 1ls-2473VE. rRD-sA(M).1582.1(GX-230only)1 0 D 4 . . . 5STK-015 . . .2 (GX-230 only)POWER SUPPLY AND POWER CONSUMPTION100 to 240V A.C. 50/60 Hz, 90W Universal Models240V A.C. 50 Hz, 90W BSI Models220V A.C. 50 Hz. 90W CEE Model
14、sl20V A.C. 60H2,90W CSA Models100V A.C. 50/60 Hz. 60/65W JPN ModelsRecorderTvoe: l20WDIMENSIONS441(W) x 404(H) x 210(D)mm(l7.4x15.9x8.3)Dimensions include ailGX-230D 15.2 ks (33.4 lbs.)cX-230 16.7 ks (36.7 lbs.)NOTES: l. Specificaons determined with Scotch #2ll tape unless otherwise noted.2. Specifi
15、cations Subject to change without notice.RadioFans.CN 收音机爱 好者资料库III. DISMANTLING OF UNITIn case of trouble, etc. necessitating ciisassembly, piease disassemble in the order shown rn photoeraphs. Reassemblein reverse order.HEAD COVER: : Ft t=t rftsf -oII O-OffiESCREvjS : iuBBER -,tlOT iCONTROL KNOBSO
16、O-RONT FELDg t ,- lIIoNCH ROLLPIER CAPADJU-S-:If NTRadioFans.CN 收音机爱 好者资料库TCNNECTION PLUGSffi - t lqffi_ . J * i: ? . i- -: - f - - -:.RE,VSAfvlP BLOCKRadioFans.CN 收音机爱 好者资料库IIII. ARRANGEMENTOF MAIN PARTSFAST 2:ssiMELYTENSICN S iV9KEY SUTTCNELOCKU5E : t LEFT REEL MOTORPOWER TRANSFORMERPOWER SPPLY PC
17、.30ARD lY- 2037s ,r6E, t t =3-GFi,rlf-g-HEAOBLOCKaRIGHT REEL MOTOR:ERVO :CNTROL EC.3OARD MY- 2C36: t v c , / ?i F S W 5VAIN MOTCR?EC, SW, P CBOARD MY-2044-sc. I i5c. a4P oc,SOARD lt1 r-:-6/B1-!Itt#-=-.1t-RadioFans.CN 收音机爱 好者资料库TIV. MECHANISM ADJUSTMENT-BRAKE LEVER BBRAKE LEVER A-_-l8Oo-.SOLENOI DFIX
18、ATION SCREWSAT STOP MOOE F iq,2I. ADJUSTN ENT OF PINCH 1VHEEL PRES-SURE (Refer to Figs. I and 2)I ) Unfasten Microswitch (SW4) Activation Adjust-ment Screws C and C.2) At play mode, confirm that Brake Lever A andBrake Lever B are placed at a 180 angle inrelation to each other. If necessary, adjust t
19、heangle by changrng Play Solenoid (SL-l) position.3) Adjust prnch wheel pressure to 1.5 t0.l kgr-cm byre-positioning Plate A and Angie B.SCREW C -SCREWCAPSTAN SHAFTPINCH WHEEL4) Then, at stop mode. fasten screws C and C so thatthe clearance between the body of MicroswitchSW4 (with time delay) and th
20、e actuator of themicroswitch is approximately 0.5 mm as shown inFig. 2.X O5mmSPRING -Jsw-4RadioFans.CN 收音机爱 好者资料库ISOmm-BRAKE BAND SUSPENSION METALBRAKE BAND .2. BRAKE TENSION ADJUSTMENT (Refer toFigs. 3 and 4)l) As shown in Fig. 3, use a 60mm diameter tapewound on a 5 reel and set both left and righ
21、tbrake tension to approximately 350 gr-cm.Deviation of left and right tension must be within50 gr-cm.2) Brake tension can be adjusted by changing posi-tion of the Suspended Spring. If necessary, changeFig.3METALX Confirm thot boih orecorplloly soporotedFig.4the position of the Spring Suspension Meta
22、l orreplace the spring.3) At all modes except stop mode, confirm thatneither of the brake bands touch the cloth tapearound the brake drums.ERAKE DRUMAvRadioFans.CN 收音机爱 好者资料库TREEL TABLE F|XATION SCREWS,Ittt;/ E E L I A E L E -MAIN MOTOR- IHRUST SUPPORT ANGLEFig. 53.ADJUSTENT OF REEL TABLE HEIGHT(Ref
23、er to Fig. 5)I ) Properil load a tape and move the reei table asindicared by the arrow mak in Fig. 5.2) Fasten Reel Table Fixation Screws to maintainoptimum position at F. FWD and RWD modes.NOTE: Tape should wind on center of reel resard-less of type reel used.4. ADJUSTMENT OF CAPSTAN MOTORSHAFT LOO
24、SE PLAYAs shown in Fig. 6, adjust the loose piav by insertingan adjustment washer (U type) to obtain a 0.3 to0.5 mm degree of loose play when the capstan shaft ismoved by hand.RadioFans.CN 收音机爱 好者资料库tXO.l to O.3nmFig. 7l=_1_IAPE GUTDE, i-i tTENSION ARMA&JUSTMENTlfl:,i: lTaslightly 5. ADJUSTMENT OF I
25、MPEDANCE ROLLERSHAFT LOOSE PLAY (Refer to Fig. 7)Adjust by tuming adjustment screws A and B toobtain a 0.1 to 0.3 mm degree loose play when theshaft is moved bv hand.NOTE: Both A and B screws must be tiehtened afterthis procedure.6. HEIGHT ADJUSTMENT OF TAPE GUIDEON TENSION ARMAdjust the height of T
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