Hitachi-D900-tape-sb 维修电路原理图.pdf

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1、RadioFans.CN 收音机爱 好者资料库I No.t, ,52p zMODDESTINATISUBJl. ReasonsNo i Parts4. How to di5. ExecutionI+._ _I 6. R,n.kII_ainch roll-er bej.ng deformeclrso the length of the capstan has-_J i HITACHI SERVICE BULLETINL- _ ._)l iDELSD-gooTIONSBJECT Change o: frrvtr-ee-_jl capstarr. is short and- there is C.a

2、nge:_ainch roll-er bej.ng deformeclrso the lengl-b_e_en-fenetbeasd-g-L- Lchanges(A) New parts after changesw,lr-tl(ssi;4+-t-Aw-l lssued o29- ji-or_ J-9Issued by Toka.iSerial No. f.-L12(of factory): of part of theOriginal parts before changesNo. i DescriptionFOR YJapan*Parts No.Des cription!UK fJapan

3、II1-72 | f fylrreel(R)340-_s6372609FlpvheeJ-94 | nlywrreel-(r,)I ero-zAB637258.1TlyrheelAB-l-neInterchangeability -, 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 interchangeable.Before changes-i- - :- i -i-.-:-i-spose of original part

4、s in stock.(1)(2) ScrapI Seial No._ _ _i_ij from- - -f-j fromMhen ii Model:-lifrom 11from liSerial No.fromfromWhenRadioFans.CN 收音机爱 好者资料库No.S3-iolz._,.-)nsrtuATloNsMODELS u-quulssued on *+f+q8Issued by !okel-Serial No. I-lO?_(of factory)I-r- P.ur-poge . : ,. , tehalrltelgguncl oceurs. nodification h

5、as been2. De.tail of changa. f). Crook AS spring asmoderso to f-mprove itrfollowingln SPOPmad.e.shorvx. belog.?Proeedlurel.Crook AS spring as a ,dotted line.: Dinention of Fan 1s 1-2ron fron AS controlspring to iltersecting point of AS controtr plate and chassis.Z.Then check the tention at polntnbr

6、wfth tension gege that :i:AS control plate bigin to start to rotete withln .4-6 grantension. ff measured tension ie not within 4-6 gramr. l-i. readljust the crook of AS eprlng.3.After assemblingrtum on the power.And confirm that abnsrmal gound. doesurt produceil on SOP nodo.21. Change of e.ke-up ree

7、l :Adtlltion of washer*ake-*p tzulTW% arzrUJashot l, fY.; .trlt-:-.t/ur.t I_-=:-i-T-_ MODELS D-qso an sO sDT_g6OO. DESTINATIONS :r. ,SUBJECT , Improvement of mechanl. creopr . -a-2. Dctrib of changec(A) New parts after changesecl from F gear of,ation has been ma( B) O ri ginalI _rlIIIrr B. i g, g ca

8、n bc a subs-x-,ossiblc. A B: Not interchangerlefore changes .Issued by I_AlSerial No. -:(of factory) -DescriptionFOR Japrntitute for /bl e.I r,ubiicatel._-vl.ryl. Hor to dispoec of originel parts in stock. (l) Use (ZlE. ErccutioaHitazo1r on thisNo.3-,C /Issued ,nJul.y-2O-Jlssued by okalMoDE L s 4 W?

9、2s/sDr _9 6oa/1 1 gt-Serial No. f-110(of factory)DESTINATIONSSUBJECT fnprov,ement of auto stop maI-fwrction.;. : lf,ape transportatlon Ls stoppetl by rrorlcing of auto stop nechanlsuonDleying back,4deBo to improrre itrfolowing noclificatloir hasbeea m*flg.FloatAS armArn shaftFl,oatingcanTake-up turn

10、table-lIGear pJ-ate assCyProcedureI.Remove Gear plate asBty.Lubllcate Pan motor oil on the eontact surface of Floati-ngand Am shaft aflal AS s.rmo.2.Make sure that AS arm moves smoothly.Execution n-io/t n sDr-960 o /77 8r,=Iarmjt:t.vIssued onIssued byMODELS.: DESTINATIONSD-550 /7 zo/ snr-96oo / 96.:

11、0 /7 7 85SUBJECT Improvement of pprse rnachetrsm ,.-*.,; . ,:1 , k fglntr.I)qu*esaghsn.enrwhe? Ilause lnrtton deprgsged to to.g tnftape 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:

12、e,e,4, at. ,l.eeinntgS ,nba . BaUEQis reLeasecl. ,.,r ;_ .,.g_.: 1. . .-. . ; . . .So to improve this problem, pause nechanfsu.,has been- changed ag FAfter change .Tihen pause buttn 1s depressecl to release pauE1) Ifeeds keep toucb, to tape surface.2l Pressure roller d.etach frou capstan. i,:Detail-

13、s of changesDescrlptioaSerial No. !-I11(of factory)t.aPreesure rollerPause leverL!gg:g_ ch,a.lse arm| -r-r- -. t -ri Ptayback plate ass6743589 50.-730528t 20.-7297225 20.-7296058 60.-6383r546743587,638315?7287038729605572870347287s35fl 72870327287L33- D;550UD-?2oAL,L SDf-96SDS-?858352-aExecutionD_550_-_7110?501D-720-711.o?0O1sDr-?85-7r104OOrsDT-9600-71105OO1other fron INov. ofNov. ofNov. ofNov. of77,7771.77HITACHI SERVICE BULLETINNew oarts IOrlglnal par:s7287138k