Seagate ST225 - Page 6

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j.8 Faull D~t~':lion ., , , H
5.8.\ DC·Um'al~ Si8n~1 ~4
'.8.1.1 VoUla~~ Comparalor., ,
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'.8.2 H~ad Select Comparators ., ............•..................... 24
6.0 powt:R·B.\ SF.Ql'E;I;n: .•..•...........••....•••..••••••• :: ... 25
7.U UATATR.",;I;Sn:R U;I;t:s ...............••..••.•.....•••.....•. 26
7.1 WrileOper.ation., ......................•....................•.. 26
7.1.1 :\IFM \;vrile Data .............................•......•.•..... 27
7.\.2 Write Gale, .....................•....•........•......••.... 27
7.1.3 Line R"'cei\'~r . , 27
7.\04 Precorrnpensation ...........................•.......•....•... 27
7.2 R~ad Ope ••:"ion 28
7.2.\ M F~I Read Dala .............•.•...........•.•......•....... 28
7.2.2 Head Select 28
7.2.3 lSI Preamp , .................•..•..•....•.............. 28
7.204low·PatsS Filler ..................•........•..........•.•.. · .28
7.2.5 Phase Shifr~r 28
7.2.6 Z~ro·ClosS DCICclOr , ................••.................. 29
7.2.7 Time I>omain Fih~r ..................•.....•................ 29
1.2.8 Line Du-h'er ............................•.................. 29
1.0 TlIt:ORY OF OPERATIO;l;S .....•.....•..•......••.•.••.•••..•• 30
8.1 Microproc~sor .................................•............... 30
8.1.1 MPU·h,ilializing ............................•....•..•...•••. 30
8.1.2 MPU-Itdle ......................•.................•......... 30
8.\.3 Seeking: , ........................•.......................•.. 31
8.2 Spindle M01er Conllel .........•....•...•.............•.......•. 31
9.0 fIELD SERVICE ....•••...•......••..••.••..••••.••••...•....• 3J
9.1 PC Board Removal ....................•..•..................... JJ
10.0COMPOSf.:\T LOCATIO:\S. SCm:MATICS .....•.......•.•...• J5
APPE:IODIX
I::J2Srclnr. 256 D)'le/Se<lor Formal Eumple •....••••.•••• 31
APPE:-IDIX 2~ Siandard Spares List. ..........••.......•••.........•. 39
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