Hitachi-D900-tape-sb 电路图 维修手册.pdf

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1、RadioFans.CN 收音机爱 好者资料库 I No. t, ,52p z MOD DESTINATI SUBJ l. Reasons No i Parts 4. How to di 5. Execution I+._ _ I 6. R,n.k I I _ainch roll-er bej.ng deformeclrso the length of the capstan has -_J i HITACHI SERVICE BULLETIN L- _ ._ )l i DELS D-goo TIONS BJECT Change o: frrvtr-ee- -_jl capstarr. is

2、short and- there is C.ange: _ainch roll-er bej.ng deformeclrso the lengl -b_e_en-fenetbeasd-g-L- L changes (A) New parts after changes w ,lr-tl (ssi; 4 +-t-A w -l lssued o29- ji-or_ J-9 Issued by Toka.i Serial No. f.-L12 (of factory) : of part of the Original parts before changes No. i Description F

3、OR Y Japan *Parts No.Des cription !UK f Japan I I 1-72 | f fylrreel(R) 340 -_s 6372609FlpvheeJ- 94 | nlywrreel-(r,)I ero -z AB 637258.1Tlyrheel AB -l- ne Interchangeability -, A can be a substituete for B. e + + A B: Both A B and A B are possible. A B: B can be a substitute for A. A B: Not interchan

4、geable. Before changes -i- - :- i -i-.-:-i- spose of original parts in stock. (1)(2) Scrap I Seial No. _ _ _i_ i j from - - -f- j from Mhen ii Model :- li from 11 from li Serial No. from from When RadioFans.CN 收音机爱 好者资料库 No. S3-iolz ._,. -)nsrtuATloNs MODELS u-quu lssued on *+f+q8 Issued by !okel- S

5、erial No. I-lO?_ (of factory) I-r- P.ur-poge . : , . , tehalrltelgguncl oceurs . nodification has been 2. De.tail of changa . f). Crook AS spring as moderso to f-mprove itrfollowingln SPOP mad.e. shorvx. belog. ? Proeedlure l.Crook AS spring as a ,dotted line. : Dinention of Fan 1s 1-2ron fron AS co

6、ntrolspring to iltersecting point of AS controtr plate and chassis. Z.Then check the tention at polntnbr wfth tension gege that :i: AS control plate bigin to start to rotete withln .4-6 gran tension. ff measured tension ie not within 4-6 gramr. l-i . readljust the crook of AS eprlng. 3.After assembl

7、ingrtum on the power. And confirm that abnsrmal gound. doesurt produceil on SOP nodo. 21. Change of e.ke-up reel : Adtlltion of washer *ake-*p tzul TW% arzr UJasho RadioFans.CN 收音机爱 好者资料库 t l, fY.; . trl t-:-.t/ur.t I _-=:-i-T- _ MODELS D-qso an sO sDT_g6OO . DESTINATIONS : r. ,SUBJECT , Improvement

8、 of mechan l. creopr . - a- 2. Dctrib of changec (A) New parts after changes ecl from F gear of, ation has been ma( ( B) O ri ginal I _ rl I I I rr B. i g, g can bc a subs -x- ,ossiblc. A B: Not interchanger lefore changes . Issued by I_Al Serial No. -: (of factory) - Description FOR Japrn titute fo

9、r / bl e. I r,ubiicate l._-vl.ry l. Hor to dispoec of originel parts in stock. (l) Use (Zl E. Erccutioa Hitazo1r on this No. 3-,C / Issued ,nJul.y-2O-J lssued by okal MoDE L s 4 W?2s/sDr _9 6oa/1 1 gt- Serial No. f-110 (of factory) DESTINATIONS SUBJECT fnprov,ement of auto stop maI-fwrction .; . : l

10、f,ape transportatlon Ls stoppetl by rrorlcing of auto stop nechanlsu onDleying back,4deBo to improrre itrfolowing noclificatloir has beea m*flg. FloatAS arm Arn shaft Fl,oatingcan Take-up turntable -l I Gear pJ-ate assCy Procedure I.Remove Gear plate asBty. Lubllcate Pan motor oil on the eontact sur

11、face of Floati-ng and Am shaft aflal AS s.rmo .2.Make sure that AS arm moves smoothly. Execution n-io/t n sDr-960 o /77 8r,= I arm j t: t. v Issued on Issued by MODELS .: DESTINATIONS D-550 /7 zo/ snr-96oo / 96.:0 /7 7 85 SUBJECT Improvement of pprse rnachetrsm , .-*.,; . ,:1 , k fglntr.I)qu*esaghsn

12、.enrwhe? Ilause lnrtton deprgsged to to.g tnf tape tra.nsportation tenporarily dluring playtng back 9r rg-c.o.T$tngrheEe -. an presstrre roller retunn. to orlgfnal posftlon. herefore, it rras caused by elow tapg, .Fp:e,e,4, at. ,l.eeinntgS ,nba . BaUEQ is reLeasecl. ,.,r ;_ .,.g_.: 1. . .-. . ; . .

13、. So to improve this problem, pause nechanfsu.,has been- changed ag F After change . Tihen pause buttn 1s depressecl to release pauE 1) Ifeeds keep toucb, to tape surface. 2l Pressure roller d.etach frou capstan. i,: Detail-s of changes Descrlptioa Serial No. !-I11 (of factory) t .a Preesure roller

14、Pause lever L!gg:g_ ch,a.lse arm | -r-r- -. t -r i Ptayback plate ass 6743589 50.- 730528t 20.- 7297225 20.- 7296058 60.- 6383r54 6743587, 638315? 7287038 7296055 7287034 7287s35 fl 7287032 7287L33 - D;550U D-?2oAL,L SDf-96 SDS-?858 352- a Execution D_550_-_7110?501 D-720-711.o?0O1 sDr-?85-7r104OOr sDT-9600-71105OO1 other fron I Nov. of Nov. of Nov. of Nov. of 77 ,77 71 .77 HITACHI SERVICE BULLETIN New oarts I Orlglnal par:s 7287138 k