Sharp MZ-80SFD Manuel d'utilisateur Page 1

SHARP SERVICE MANUAL PDSMX81014-MZ Single Floppy Disk MZ-80SFD FEATURES • High speed reading and writing of data and programs. • Easy deletion and

4. Media guide l assembly (with write protect sensor lamp) 1) Inspection ill Connect power socket to connector J2 of PWB unit. Turn power on. @ B

5. Operation indicator 1) Inspection CD Connect power socket to connector J2 of PWB unit and turn power on. (Z; Let drive select 0 of interface

6. Drive motor assemblv jOC motor and motor cool.ol PV/S onit) 11 Inqlect;"" C!l Connect 110_ locke. 10 cunne,"o< J2 of PWB unit.

[ TROUBLE SHOOTING GUIDE Start of disk system Yes Check repair procedure for power ~-----~ supply section. (See pages 13 and 14.' Yes Trace t

• Error chart for disk system Error code [Error message] Contents Check item and corrective action 50 1) Drive fails to be ready. [NO READY] o Diske

'-' v ! POWER suppLy SECTION Block Diagram of Power Supply Section .---r--.. GI ~ E Rectifying and Transistor AC .. .. GI ~ Chopping ~ Smoot

• Trouble Shooting Chart Problem 1: No voltage appears at any output terminal. ~ Check AC cord I AC socket, F101, F102 AC switch and C10t. Is there

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A B c o E F G H 1 • Power Supply PWB 2 3 4 Primary 5 6 7 -• J 8 9 F0410PA 10 Secondary 11 -16-

-----------------Contents----------------~~ Specifications ... . Constitution of single floppy ...

A B c D 1 • Disk Drive PWB (Reference diagram) 2 J 4 3 4 5 6 7 8 9 10 1 1 ~:lO" . . . • --;;-i w • • __ a:: ;~} 1:' . ... 0; ;&apos

IrPACKING METHOD Packing Add. (SPAKA0078PAZZ) AC. Cord (OACCKOO50AFZZ) Drive Number Label \ ~ (TLABZOO29PAZZ) 8) (TLABZ0033PAZZ) B (TLABZOO35PAZr~ I (

REPLACEMENT PARTS LIST "HOW TO ORDER REPLACEMENT PARTS" To have your order filled promptly and correctly. please furnish the following in

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PARTS LIST REF. PART NO. DESCRIPTION CODE REF. PART NO. DESCRIPTION CODE NO. NO. CN2 } OPLGZOl15PAZZ 37-Pin Socket BB ••• OTHER SECTION ••• CN3 SW1

11 I SPECIFlCAnoNS I · General specification. , Item Specification >---------------Drive-to-drive connection Daisy-chain system (a maximum of four

I OPERATIONAL PRINCIPLE OF FLOPPY DISK 1 The floppy disk is designed to rotate the so-called "diskette," a magnetic disk storage unit, to

6) Write protect detection section A luminous diode and a photo-transistor are used to detect write protect notch of the diskette and jacket. (W

® Write data signal This signal is used to write in data on the diskette. Each time changing high levels to low levels, the current flowing in

3) Timing DC POWER MOTOR ON DRIVE SELECT --KOO -VALID TR AND WRT OUTPUT PRT VALID INDEX DIRECTIO SELECT STEP N SIDE ONE SELECT WRITE GATE WRITE DAT

1. Belt 1) Inspection Check to see if the belt is stained with dust or dirt. Also make sure that there· is no unevenness, scratch and thinned part.

3. I ndex lamp assembly 1) Inspection CD Connect power socket to connector J2 of PWB unit. Turn power on. ® Make sure that there is a voltage r