Akai-GX230-tape-sm维修电路图 手册.pdf

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1、I $nUEEillAilljAL PAHT$LilSTru AKAI STEFIEC TAPE trIEG MG.ELGlX-?3cltrI ALScl APLICAEILE TtrI McltrlEL GX-E3cl RadioFans.CN I STtrREO TAPE DECI( IODEL GX.23OD ,LSO .PPLICABLE TO IODEL GX.30 SECTION I SERVICE MANUAL SECTION PARTS LIST SECTION 3 SCHEMATICDIAGRA . I 23 .tl RadioFans.CN I SECTION I SEtr

2、IVICE MAIITJAL TABLE OF CONTETS I SPECIFICATIONS II. DISINTLING OF UNIT III. .RR-,NGENENT OF TAIN PARTS IV. fECHANISN ADJUSTIIIENT I. .DJUSTf ENT OF PINCH HEEL PRESSURE . BRAKE TENSION ADJUSTIENT 3. .DJUSTENT OF REEL TABLE HEIGHT .I. .DJUSTIvENT oF CAPSTAN oToR SHAFT LooSE PL.Y .i. .DJUSTIENT OF II,

3、IPEDANCE 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 PoSITION 10. .DJUST ENT oF PLAY ilcRoswtrcH (sw-r

4、nd SW-il r .CTIVATOR POSITION . HEAD .DJUSTENT VI. .IPLIFIER SYSTEM ADJUSTIIENT I POER SUPPLY VOLTAGE ADJUST,ENT :. TPE SPEED ADJUSTNENT . 3 RECORDING. PLAYBACK AMPLIFIER .DJUSTIENT VII. D.C. RESISTANCE OF VARIOUS COILS VIII. CLASSIFICATION OF VARIOUS P.C. BOARDS I. P C. BOARD INTERCIIANGE,BILITY CI

5、IART COIPOSITE VIEWS OF (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 fIENTS l -t 6 7 7 l 9 9 t0 l0 il ll t2 lz 3 l5 t5 t5 l6 l7 l7 l7 l8 RadioFans.CN I I. SPECIFICATIONS An astersk next to a figure indicat

6、es the minimum guaranteed performance. TRACK SYSTEMi 4 track 2 channei stereo svstem TAPE SPEED7-ll2 and 3-314 ips. x0.7% *l-ll2 ips. (19 crn/sec.) xl.Mo *3-3l4 ips. (9.5 cml Less 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-

7、ll2 ips. REV * Less than 0.15% at 3-3 4 ips. FWD *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 Tapel 30 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

8、18.000 Hz t3 dB at3-314 i Less than 1.07o Less than 1.5% at 7-ll2 ips. WOW / E E L I A E L E - MAIN MOTOR- - IHRUST SUPPORT ANGLE Fig. 5 3.ADJUSTENT OF REEL TABLE HEIGHT (Refer to Fig. 5) I ) Properil load a tape and move the reei table as indicared by the arrow mak in Fig. 5. 2) Fasten Reel Table F

9、ixation Screws to maintain optimum 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 MOTOR SHAFT LOOSE PLAY As shown in Fig. 6, adjust the loose piav by inserting an adjustment washer (U type) to obtain a 0.3 to 0.5 mm

10、 degree of loose play when the capstan shaft is moved by hand. RadioFans.CN t XO.l to O.3nm Fig. 7 l=_1_IAPE GUTDE , i-i t TENSION ARM A211 tape 15,000 Hz -20 dBm Scotch =21I tape 15,000 Hz -20 dBm (L) Maximum output. both channeis. Adjust head gap surface so that there is no change in output level

11、when tension is applied to the supply reel side. NOTE: Set tape speed to 7-l/2 ips. when making ali alignment adjustments. L4 RadioFans.CN VI. AMPLIFIER SYSTEM ADJUSTMENT 1. POWER SUPPLY VOLTAGE ADJUSTMENT2. TAPE SPEED ADJUSTIENT J ffi t ,-l -|,l,*i =-lI F I L r - rr! | 1:) O G/- |ry.I-I:l I _ ffiff

12、R ilt IGT _i | gcm /3cc. VR I IOKE . a t l K 8 ,:CJUST TO 24V Fig. 14 Test Tape 1.000 Hz. 7-Il2 ips test tape i9 cm/s!c I l - 9 5 c m / s c : Fis. l5 I i Remaks I 3 e Result 24.0V Terminal , Po*t Supply P.C. Boad Tape Speed 7-ll2 ips. Mode STOP FWD P.B. Adjustment Item Power Supply Voltase Adiustmen

13、t 7-ll2 ips. Tape Speed Adjustment t. ,r.fi 3-3/4 ips. Tape Speed Adjustment i,000 Hz. 7-ll2 ips. test tape FWD I p. I VR2 30 kB 500 Hz xlj%Tape Speed 3-3/4 ips. r5 RadioFans.CN 3. RECORDING. PLAYBACK AMPLIFIER ADJUSTMENT VR2D 20K8 w ,R I vR3 /R3b VRrb SOKB 2KE 2K8 3CKB a ,a,a v) V) lU -/ A .9 .V _

14、t _ ( h 3OP iOP */ L I 23mH Adjustment tvv ftz, t-Ll tps. O VIJ test tape i vR32kB i Adjustment Item Test Tape Supply Signal Mode Adjustment Point ResultRemaks Playback Level Adjustment 700 Hz, 7-Il2 ips. test tape FWD P.B. VRl 50 KB 0 rl.0 dB (0.77sv) within 0 t1.5 dB at rsverse playback VU Meter S

15、ensitivity I 700 Hz.7-l12 iFWD Recording Level Adiustment Frequency Response Adjustment Scotch #21 I tape. 1,000 Hz O rU recording Scotch #21 I tape, 1,000 Hz, 10,000 Hz -20 dBm recordins vR2 20 kB c25 80P I tt23mH 0 tl.5 dB (0.77sv) 1,000 Hz to 10.000 Hz flat Less than -30 w REC Monitor Switch at S

16、OURCE Readjust recording level following bias adjustment With Monitor Switch at TAPE and SOURCE Positions. Bias Leak Adiustrnent REC NOTES: l. Tape Speed at 7-Il2 ips. (19 cm/sec.) 2. Tape Selector at LOW NOISE. 3. Output volume maximum. 4. Nerv test tape should be used. 5. The letter b following an

17、 adjstment puts number indicates right channel. r6 RadioFans.CN VII. D.C. RESISTANCE OF VARIOUS COILS PartDesisnationD.C. Resistance fain MotorSCM2.4KJ Between BLU-RED 100 ohm Between YLW-GRN 180 ohm Pick-up Coil 635 ohm Reel Motor4XO-MR Between BLU-RED 74 otun Between YLW-GRN 166 ohm Plav Solenoid1

18、660 THT3685 ohm Shut-Off Solenoid0730 THTl15 ohm tlj% RelayMY44-US-ADA DC24V650 ohm RelayMTS.2980 ohm Head phone Output Transformer N16-53sS Primary 565 ohm !15% Secondarv 0.95 ohm xIS% Oscillator Coil Plavback Head oT-204 P4-202 Bereenl-3 0.3ohm Between4- 6 0.7ohm Between7-9 %+ffi 168 ohm Combinati

19、on Rec.;Erase Head RE4 Rec.5.5 ohm Erase 1.8 ohm NOTE: Resistance values shown in this chart are averase values. VIII. CLASSIFICATION OF VARIOUS P.C. BOARDS I. P.C. BOARD TNTERCHANGEABILITY CHART P.C. BoardGX-230DGX-230 Relay P.C. BoardMY008MY008 Servo Control P.C. BoardMY-2036MY-2036 Power Suppiy P

20、.C. BoardMY-2037MY-2037 REC. SW. P.C. BoardMY-204MY-2044 Transistor P.C. BoardMY-2054 MY-2054 Equalizer P.C. BoardMY.5O I4 A.BMY.sOI4A.B Lamp P.C. BoardMY-501sMY-501s OSC. and Recording Amp. P.C. BoardMY-5016MY-50r6 Playback Amp. P.C. BoardMY-5017*MY-s017* Main Amp. P.C. BoardMS-5024 NOTE: Asterisk

21、mark indicates not interchanseable t7 RadioFans.CN 2. COMPOSITE VIEWS OF COMPONENTS 1. OSC. and Recording Amp. P.C. Board O4y-5016) - i : a : *-;*;ri- | ?. i? .:-:=:=tb1 -lb+J ir Fl .Fi.,*r i + r, i- ul , + rEF*rT l ;,BJ F F ; *1, ,: *J . ;, ril.t J - . . i, I *qf t llfl, lff11 9k- d-. ,: *,.*q 3, ;

22、i9;i;i.s S.*r,t;a., b s;SsElj $.tElEn!EK;ie ; i ffigKl ry,$: ;i ffi#;r3*. * ffi p E-qti ull .*l.tFxql ? - a a I O a a a r - r a a - . r- t ? tf ? I lt f -*Il Q ff r . : f l , t , - :*lc:sl* :*!r , e .*lffii.g ; t;!-1,?,f r- a i ffi,l#$Lifi ffifi#*Fffi *.;a _ g3l.r;. fi :i. #,*.F*+t+ i; i#tht5$,5+*f;

23、 g ;llNi;, : l t , !: t s | s t tffifu- ii i;llr: Nfftq .$fntq-i Itrllr* t*, r:isli.ffidt*, 11 tr*riirffffffi l8 RadioFans.CN l. Plavback .mp. P.C. Board (MY5017). , - f: = fiF: iE: -b i cl 4 I I I rl- =l I t I r i i , .ll , I ! ortt L + G d C / :. rrlt .* i- =+.=lf ii f3 ar : t i.*r.I-q$i $ l.-Tpt*

24、f 3l s - r c z * i 9 ffi*fF t. F C F, r : ; o f : 6 : , a - ; e , l : =i : i u l i I i c, = T c) D C N C o) -t m I z I O x -c ; x = till: l l l l r r t l g3 : o ; t ) z o a) - l o O - D m ! D o r N il ti 9ll t. F.ll ilr lll i 1 1 ! I -= =: a - t S f r N-LOCK J9 -: REC !AiP lND. I o atffi SsTT tNC.2.

25、 20 RadioFans.CN - f A o E Q p q ieoM PtcK ,P -.: - - colL oF VAIN rcfoR -LECTOR swlz I - - -dR t o z 693 o-H Fa F z 3f- l o a o , a o a a -l if 1 5 + , 4 i l a . , fltr qATG l l . l o r0l inoo l., ., S t r iAP SELCfORI MY=sETFTA- z F 2l RadioFans.CN I : F tn 9. Main Amp. P.C. Board (MS-5024) 10. Re

26、lay P.C. Board (MY-0008) i I I I ) l i t l t t t l il tl G) olo F (Jx P L s ( h o gx O Y lr = Y ; t!= L ll= :ll l l Q l l l l t I H stl l l F i nF r, l l ! l (9 ) E F a T : J lJ - at (L lJ ll lrJ = l! ,.- -l FROM FOWARD P8. HEAD (R. CII.) TO ML.-TI PLIJG P8 FROM REVERSE PB. HEAD (R. CH.) l rtnn il t

27、l il tl 5-3 F e ro Pg 41 ? =i o 9r 1 1 RadioFans.CN SECTION 2 PAFITS LIST TABLE OF CONTENTS Frg. I HEAD BLOCK Fig. 2 R-EEL MOTOR/REEL TABLE BLOCK Fig. 3 MAIN MOTOR BLOCK Fig. 4 OPERATION BITOCK Fig. 5 PINCH ROLLER PLLJNGER/QUCK Sw. BLOCK. . . Frg. IMPEDANCE ROLLER BLOCK FE. 7 TENSION ARM/DIRJCTION S

28、w. BLOCK Frg. 8 MECH. ASSEMBLY BLOCK Frg. 9 POWER SLJPPLY BLOCK Fig. l0 REC., OSC. P.C. BOARD (MY-5016) BLOCK Frg. 1l PB. P.c. BOARD (MY-5017) BITOCK . . . Fig. 12 SERVO P.C. BOARD (MY-s036) BIJOCK Fis. 13 EQ. P.c. BOARD (MY-s014) BLocK Fig. 14 POWER SLJPPLY P.c. BOARD (MY2037) BLOCK Fig. 15 MAIN AM

29、P. (M95024) BLOCK Fig 16 AMP. ASSEMBLY BITOCK Fig. 17 FINAL ASSEMBLY BLOCK INDEX 24 25 26 27 29 30 30 3l 33 35 36 37 38 38 39 39 4l 42 23 RadioFans.CN FIG. 1 HEAD BLOCK _Whenorderingpas.pleasedescribePartsNumber.SerialNumber.andModelNumberindetail.- 24 RadioFans.CN FIG. 2 REEL MOTOR/REEL TABLE BLOCK

30、 = _ 1 g -ib Ref. No. rarts No. r-2Ex HZ583l76 r-29 25411816 l-30 MH25094 1-31 zs39900 r-32 EA625138 I -33 EP62 I EOE l-34x ED24903 l -35 E2625r21 l-3 25422016 l-37x EA382713 t-38 MH25083 l-39 2W416698 Description RE4- Terminal Plate Screw, pan head 2x3 Relay Prop Screw, pan head 3x8. w/washer Relay

31、 P.C. Board Y-0008 Relay MTS-2 t;-2-26 Silicon Diode IS24?3 15-3-28 Relay Shield fY-0007 Screw. pan head 3xS Scheratrc . o. (J tY T$-0035 I ., fY-0005 2 Head Connector P.C. Board Double Side Screw Prop Nut M4 RDAS fY-0001 2 I I I I 2 I I I REEL MOTOR/REELTABLE BLOCK HEAD BLOCK $: Parts No.D escripti

32、on 1- l x 8H622 585 Head Block Comp. l-2 H2626E37 Head Base A l-3 H2626848 Head Base B l4 MS25072 Tape Guide l -5 ZS4I4O44 Screw. countersunk head 4x8 I - ZS4l32O I Screw, pan head 4xE I-7 MH578957 Tape Guide Prop I -E HZS327IO Tape Guide B l-9 2G466312 Angle Adjust Spring E i-lO 2W273835 Nut M3 l-l

33、 I MH529233 Head Base Prop B r-12 2W2739 14 Spring Washer M4 I - I 3 H2532132 CH Retaining Base l-14 256085l2 Screw, pan head 3xl3 I - I 5 2G4663 12 Angle Adjust S pring E l-l HZS32165 PH Retaining Base l-17 ZG3O33OO Angle Adjust Spring B l-lE HA25105 Head Angle A 1-19 HA625 I l6 Head Angle B I -20

34、H2627 546 Head Shield 1-2 I Z360A411 Screw, pan head 3x4 l-22 ZW4l3256 Washer (SPC) D3.ax7.8x0.5t r-23 HPs3SOl PB. HEAD P4-202 l-24x EA4632O Terminal P.C. Board A 1-25 ZS2Ol508 Screw, pan head 2x4 t-26 HA532743 CH Angle A I-77 HR55582 REC./ERASE HEAD RE4.6 tn.l.f etv v Y l nY-0001 t MY-0002 I MY-000

35、3 2 I 5 TD0003 2 TW-0006 2 890018 2 4 ri00l7 2 4 TW-0008 I 9 BS-ml8 6 TW-0010 2 RD55 3 MY-0006 I It Y-0006 I MY-0010 2 6 3 2 RDA36 4 4 TW-0009 I I $: Parts No. 2-t BM3l474l 2-2x 8R398430 2-3x 8R398441 2-4 MT488l4? 2-S MT2 5 5420 2-6 MS342000 2-7 ZG2SS633 2-8 MT291663 2-9 2W270088 2-ro MT391225 2-rr

36、MT495606 2-l2x MT495617 2-r3 MT405268 2-l4x 2W273718 2-l5x 2S425981 2-r6 MT43680 2-r1 MT3l?48s 2-18 2G3r1496 2-t9 MR317507 2-20 255t6644 2-2t 25424056 2-22 25403222 2-23 MB25566 2-24 ML3r4916 2-25 MT314987 2-26 M23t4998 2-27 M23r5000 2-24 MG540s5l 2-29 2W290283 2-30 MH317373 t1 e, IRK-D.|IS, fc.ItY

37、I KD.KF.IIY I D.KF.IlY I Rt2i2 I iR-102 I 3 R-108 I 3R-109 I 3R-139 I 6-l-9 I KD20l7 I fR-216 I fR-216 I KD20l8 I 2 2 tR-269 I )rR-218 I tR-260 I fR-217 I 2 2 fY-1016 t ItR-210 I IIR-213 z 11R-212 .1 fR-21 2 D1076 2 6-l-t I rR-102 I Description Reel Motor (24XO-2) Block Comp. Supply Reel Table Block

38、 Comp. Take-up Reel Table Block Comp. Reel Table Disk B. RD Reel Retainer Reel Shaft Reel Spring 3 R O R i n g 2 . 9 x 1 . 6 5 M ERing l.9M Reel Table Rubber Brake Drum (R) A (Take-up) Brake Drum (L) A (Supply) Reel Table Spacer Earth Lug M3 Screw, binding head 3x3 Brake Cloth Comp. U Metal Fitting

39、Felt Tension Spring Counter Pulley (Take-u P Screw, countersunk head 2.3x I O Screw, pan head 4x lO Screw. countersunk head 3x lO Counter Belt D88.4x 1.4 Brake Lever A Brake Band Brake Band Retaining Plate Brake Band Support Brake Spring U R i n g 2 . 8 5 M Brake Lever Prop 25 RadioFans.CN FIG. 3 MA

40、IN IOTOR BLOCK Ref. No. 3 - l x MAIN MOTOR BLOCK Parts No.Description t1;e, BMoo298 Main Motor (SCM2-24KJ) Block ComP. iMY I Thrust Washer A hJi009 I Thfust washer B hJ_i0m I Felt Washer P-i022 I Cap KJ7023 I Detector Gear Block Comp. KJ.MY.TE-l I 3-2 2W591543 3-3 2W60598 34 2W591622 3-5 SK597633 3-

41、6 BZ00300 3-1 MV388E 3-8 M2597666 3-9 M2591644 3-lo M2597690 3-l I MS59?65 5 3-12 254r3234 3-13 2W603786 3-l4x ZtN6O3191 3-l5x 2W603764 3- I 6x ZWO3? 5 3 - 1 7 M Z 6 2 S S 7 1 Steel Ball D3 Motor Shield Plate Thrust Angle Ball Holder Thrust Holding Prop Screw, pan head 4xl2 Adjust. Washer (U) u-7026

42、 KJ-7021 KJ-7029 U-70?J I I I I 2 4 D4x l3x0.2t 2 Adjust. Washer (U) D4x l3xo.5t 2 Adjust. Washer (U) D4x l3x l.2t 2 .djust. Washer (U) D 4 x l 3 x l . 6 t Motof Shield plate ty-10i I ?- t 0 9 1,2 26 RadioFans.CN FIG. 4a OPERATION BLOCK N,N: o o o a f 27 RadioFans.CN FIG. 4b OPERATION BLOCK OPERATIO

43、N BLOCK $: Parts No. ti;t ot Description w/sw. Shaft REC. SW. Lever URing 2.85M Operat Side Plate A Plunger Solenoid O?3OTHT I Joint Pin ERing l.9M Joint Silicon Dode lODl Screw, pan head 2.6x3 Lever SW. I-U2OO2 Spark Quencher U/L (DIP Type)0. lr+ I 20fl 25OWV REC. SW. P.C. Board Transistor 2SC94 5(

44、QX R) Elect./C. 1OF 25WV (Vert. Tvpe) Carbon/R. RDI/4 4.?k(J) (Stop. Type) Push SW. UEG-3808 Mylar O.OlpF(K) SOWV (Vert. Tvpe) Pin For V Connector. w/Base RTB-1.54 Pats No.Description 4-35 25432843 Screw, Pan head 2.6x4 4-36 SB292 Operat Button I (Red) 4-37 5826973 Operat Button 2 (Yellow) 4-3E 5862

45、984 Operat Button 3 (Green) 4-39 5826995 Operat Button a (White) Ref. No. t:,; o, ) MY-6012 I MY-6012 2 MY-6012 I MY-6012 I 4-l x 82622484 Operation Block Comp. 4-2 MZ6268SO Button Bracket 4-3 MZ62S6|2 Lock Plate 44 2G568934 Lock Spring 4-5 MS62560l Lever Guide, w/pin C 4-6 M2625678 Slider Plate A 4

46、-7 MZ2580 Slider Plate B 4-8 Zr,I21OlOl ERing 3M 4-9 ZG62S33I Wind Spring 4-lO MS25623 Button Shaft 4-l I ML25645 Record Lever 4-12 ML62 5634 Operat Lever 4- I 3 M2625656 Shaft Angle 4-14 25422076 Screw, pan head 3x5 4-15 2G625667 Operat Lever Spring 4-16 M2625746 Operat Side Plate B, MY MY-2mt MY-2

47、0t cF30n MY-m02 MY-2009 MY-mt0 6-l -9 MY-1023 MY-200 MY-206 MY-206 MY-20f7 MY-20 MY-2016 MY-20 6-l-l MY-2015 4t-l-tE cGl206 6-l MY-mt7 r5-2-ll 25-t-21 t-l-60 MY-20s 5-l-t5 24-t2-9 J)-ltFt 25-5-t50 I I I 2 I I I a 2 I I I 1 ) 4-r1 ML625724 4-18 2W290283 4-19 MZ62S735 4-20 8P494425 4-2t MH494414 4-22

48、2W2700E8 4-23 M2625757 4-24x ED224526 4-25 25592378 4-26 ES62l9 l I 4-27x ER589566 4-28 EA l 5082 4-29 ET3987l l 4-30 8C220994 4-31 ER212883 4-32 ES21933 4-33 EC2sO88s 4-34 E2623818 2-l-t I 32-l-61 I 28 RadioFans.CN FIG. 5 PINCH ROLLER PLUNGER/QUICK SW. BLOCK PINCH ROLLER PLUNGER/QUICK SW. BI-OCK De

49、scription t*:,;Qr, Ref. No. Ref. No. Parts No.Description i : i e o r t r c , - r . r , o . Y r r Parts No. PINCH ROLLER PLI.INGER BLOCK 5-lx 82622596 Pinch Roller Pluncer Block Comp. MY S-2 M2625768 Plunger Bracket MY-mlE 5-3 EPs?3658 Plunger Solenoid l66OTHT-3 -l-66 54x ED224550 Silicon Diode lOD4 5-2-16 5-5 25422076 Screw. pa