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Содержание TM 100

Страница 1: ...TANDON MAGNETICS CORPORATION 9333 OSO AVENUE CHATSWORTH CALIFORNIA 91311 213 993 6644 anaon 1 023 6017 TM 100 DISK DRIVE OPERATING SERVICE MANUAL ...

Страница 2: ...NETICS CORPORATION and may not be duplicated in full or in part by any person without prior written approval of TANDON MAGNETICS CORPORATION It is provided as an aid to the usef with no guarantee written or implied that the document is accurate with regard to any specification copyright 1979 TANDONMAGNETICS CORPORATION Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure ...

Страница 3: ...n be mounted in any vertical or horizontal plane however when mounted horizontally the printed circuit logic board must be uppermost The spindle is belt driven by a de motor with an integral tachometer The servo control circuit suitably sized pulleys and the tachometer control the speed of the spindle The read write double sided head assembly is positioned by means of a stepper motor split band an...

Страница 4: ...ether i e Index Sector holes in a hard sectored diskette 3 The write protect sensor disable the Disk Drive electronics whenever a write protect tab is applied to the disketteCsee section 1 16 and figure 6 1 5 DISKETTES The TM100 uses a standard 133 4mm 5 25 inch diskette These diskettes are available with a single Index hole or multiple holes Diskettes with a single hole are used when secto rinfor...

Страница 5: ...s should be connected to earth ground The 3116 male ac lug Clcated at the rear of the chassis sprovided to facilitate this connection 1 12 MOUNTING THE DISK DRIVE The Drive has been designed such that it can be mounted in any plane i e upright horizontal or vertical The only mounting restriction is that when mounted horizontally the logic peBA side of chassis must be the uppermost side Tapped hole...

Страница 6: ...nd can result in damage to the read write heads Figure 2 illustrates the physical configuration of the diskette The diskette is an oxide coated flexible mylar disk 130 2 mm 6 125 inches in diameter and is enclosed in an 133 4 mm x 133 4 mm 5 25x 5 25 inch protective jacket Read write erase head access is made through an aperture in the jacket Openings for the drive hub and diskette index hole are ...

Страница 7: ...TECT TAB Fig 6 1 16 DC POWER REQUIREMENTS 12 O 6vdc 900MA MAX AVE 6 O 25v de 600 MA MAX AVE lOOmv P P ripple 8 The Disk Drive con ists of the following functional groups Index Pulse Shaper Write Protect Sensor Track 00 Sensor Spindle Drive Control Carriage Position Control Write Erase Control Read Amplifier and Digitizer 2 5 INDEX An index pulse is provided to the user system via the INDEX PULSE i...

Страница 8: ... erased guard band on either side of the recorded track T is accommodat s the tolerances in track positioning All signals required to control the data electronics are provided bV the user system and are shown in the block diagram Figure 7 These control signals are SELECT WRITE ENABLE WRITE DATA SIDE SELECT The READ DATA composite signal is sent to the user system via the interface I I NOTE All of ...

Страница 9: ...ltage excursion across the magnetic head during a write operation The side select is used to enable one of the read write erase heads Before reading can begin the Drive must be in a ready condition As with the data recording operation this ready condition must be established by the user system In addition to the requirernents established in Paragraph 2 10 1 a 100 usee delay must exist from the tra...

Страница 10: ...nnector pin assignments and power connector pin assignments are given in Table 2 and Table 3 3 3 1 INPUT CONTROL LINES See Table 2 3 3 1 1 SELECT LINES NDS1 NDS4 The SELECT lines provide a means of selecting and deselecting a Disk Drive These four lines NDSO NDS3 standard select one of the four Disk Drives attached to the controller When the signal logic level is true low the Disk Drive electronic...

Страница 11: ... nominal data rate O 1 percent 3 3 1 5 WRITE ENABt E CNWRITEGATE When this signal is true lowtthe write electronics are prepared for writing data read electronics disabled This signat turns on write current in the read write head Data is written under control of the WRITE DATA input line It is generally recommended that changes of state on the WRITE ENABLE line occur before the first WRtTEDATA pul...

Страница 12: ...ct 2 and Drive Select 3 are provided so that the using system may select which drive on the interface is to be used In addition Drive Select 4 is provided as an option In this mode of operation only the Drive with its Drive Select Une active will respond to the input Unesand gate the output tines The program shunt IC location 1E positions OS1 052 and OS3 are to be used to select which Drive Seleet...

Страница 13: ...forcing it Position the carriage to Track by performing repetitive step out pulses 6 Rotate the Track Adjustment Screw clockwise very ow1y until the switch clicks Then rotate the screw clockwise same directiont exact ly one hall turn 7 Tighten the retaining screwperviously loosened 3 6 3 WRITE PROTECT SWITCHES 1 flsert a nOfl write protected diskette partially halfway into the Drive 2 Ensure that ...

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