Sharp MZ-80SFD User Manual

SHARPSERVICEMANUALPDSMX81014-MZSingle Floppy DiskMZ-80SFDFEATURES• Highspeedreading andwritingofdata and programs.•Easydeletion and additionofprograms

4.Media guide l assembly (with writeprotectsensor lamp)1) InspectionillConnect power sockettoconnectorJ2ofPWBunit. Turn power on.@ Before inserting a

5. Operation indicator1) InspectionCDConnect power sockettoconnectorJ2ofPWBunit and turn power on.(Z;Let drive select 0ofinterface signals beatlowleve

6.DrivemotorassemblyIDemOlorandmOlorcortl.alPV/eunill11Inspection<!>Connect _>ocr..,'0cannectotnofPWB"";t.T...__Oft.(%ll.edin

[TROUBLESHOOTINGGUIDEStartofdisk systemoferrormessage. (See page12.1Tracethecause fromthecontentsYesYesCheck repair procedure for power~--------'

• Errorchartfor disk systemError code[Error message]ContentsCheck item and corrective action501)Drive failstobe ready.[NO READY] a Disketteiswrongly i

!POWERsupplvSEcnONBlock DiagramofPower Supply Sectionvv.---..---..+12Gl~ERectifyingandTransistor'-'...ACGl~Chopping~SmoothingINPUTLLI--cCir

•TroubleShooting ChartProblem 1: No voltage appearsatanyoutputterminal.~CheckACCOrdiACsocket,F101,F102Isthere AC220V(240VACswitchandC101.for U.K.I pre

...ocoCD"'"0)U'1~eN~...Parts marked with " & " areimportantfor maintainingthesafetyoftheset.Besuretoreplace t

A Bco EFGH123456•PowerSupplyPWBPrimary7891011Secondary-16-F0410PA

A Bc DE FG.HIJ KL MNoP1• Disk DrivePWBCircuit (Reference diagram)STEPPINGMOTORHEADLOADSOLENOID'K-~65':..JIfh,'--rIT1J1-3 ...33 0RETURNr

------------Contents--------~'\Specifications 1Constitutionofsingle floppy 1Operational principleoffloppy disk " 2Inspection and replacement

AB c DE FGH1 • Disk DrivePWB(Reference diagram)...••" '..,",~,i,~,~",.~.~;.I"., "Il>,•••...J4"c':C'&qu

IrPACKINGMETHOO---------Sack(SSAKH0016PAZZ)PackingAdd.(SPAKA0035PAZZ)AC. Cord(OACCKOO50AFZZ)(OACCBOOO1PAZZl.Label-O------~~""-...)(TLBH000

REPLACEMENT PARTS LIST"HOWTOORDER REPLACEMENT PARTS"Tohaveyour order filled promptlyandcorrectly.pleasefurnish the following information.1.M

~~~,I:".~11&-.-,//,,,/,,/,//,,/ /,,//,,€8>-..\.,,'.._._.~.,\,,"-~~..,\, .\.\,~,..'\\'\\",I" \ ,.';&apos

PARTS LIST24LX-BZOO75PAZZ95AF141336-01BeltBA25LX-WZOO03VAFE495AF120138-14PWBUnitA~y/6OACCKOO5OAFZZ595AF140630-01Index Lamp Ass'yBL&QACCSOOO1&

ItemSpecification>-------------_.Drive-to-drive connectionDaisy-chain system(amaximumoffourdrives)-----------------------Recording medium5.25-inch

_O_P_E_R_AT_I_O_NA_L_PR_I_N_CI_P_LE_O_F_F_LO_P_P_···.·y_·.····O..:...-.'...$Kw...···••.>... JThefloppy diskisdesignedtoro

6)Write protect detection sectionA luminous diode and a photo-transistor are usedto detect writeprotectnotchofthe diskette andjacket. (Writingisnotpos

®Write data signalThis signalisusedtowriteindataonthediskette.Each time changing high levelstolow levels,thecurrent flowing intheRIWheadisreversedtowr

3) Timing~\---100msMIN--[~~I--SoonsMAXKOO--PRT1000J,LsMIN-I((MAX--jII...1s1/~soonsMAXIII-NuII1J,LsMI~~--~1tlsMIN1J,LS-MIN4-1--1J,LSMIN\~~~...-'

1. Belt1) InspeetionChecktosee ifthebeltisstained withdustordirt.Also make surethatthere·isnounevenness,scratch and thinned part.2)Replacement1)Taketh

3. Index lamp assembly1) I nspeetionCDConnect power sockettoconnector J2ofPWBunit. Turn power on.®Makesurethatthereisa voltage rangeofDC1to1.7V betwee