Tandon TM-100-1 Operating And Service Manual page 6

FIGURES
Figure
Number Title of Figure
LIST OF ILLUSTRATIONS
Page
Number
SECTION I-INTRODUCTION TO THE TM-100-1 AND-2 DISK DRIVES, 48 TPI
1-1
1-2
1-3
1-4
1-5
1-6
TM-100 Disk Drive Mounting Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
TM-100 Disk Drive Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
FM Recording Magnetization Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Write Operation Timing Diagram .. . ... ... ... ............ .................... 1-1 O
Read Timing Diagram .................................................... 1-11
Logic Printed Circuit Board Assembly ..... ..... ..... . . . . . ... ..... ............ 1-13
SECTION II - MAINTENANCE CHECKS AND ADJUSTMENTS
2-1 Bottom View of The TM-100 Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2 Location of R4 Speed Control Pot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-3 ISV Pulse Pattern ....................... .... . ...... .. . .... ... .. .. . .... . . 2-3
2-4 Hub Center Line and Track Locations . .... . . .. .... ................. ... ... .... 2-4
2-5 Cats Eye Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2-6 Head Module Retaining and Cam Screws .... ... . .. . . ... ... .. .. .. . . . . ..... . .. . 2-6
2-7 Track 00 Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2-8 Index-to-Data Pulse . . ... . . .... ...... ... . . .. ........ ..... . ...... ......... 2-8
2-9 Index Sensor's Retaining Screw and Adjustment ............................... 2-10
2-10 Upper Arm and Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2-11 Write Protect Switch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
SECTION Ill-PRINTED CIRCUIT BOARD OPERATION
3-1 Logic PCBA . ........................ . . . .......................... . ... .. 3-1
3-2 Interface Configuration ................................................... 3-3
3-3 Select Lines Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3-4 Drive Motor Enable Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3-5 Direction and Step Lines Schematic Diagram . . .. . . .... . ... .. . . ....... .. ..... . . 3-8
3-6 Write Data Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 O
3-7 Write Data Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3-8 Side Select Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3-9 Index Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3-1 O Waveform at Test Point 7 (Soft Sectored) . ................... ........... . ..... 3-13
3-11 Track 00 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3-12 Write Protect Schematic Diagram ... .... . .. ........................... . ..... 3-15
3-13 Read Data Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3-14 Read Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
3-15 Servo PCBA ........ ..... .. .. .. ...... . . ... . .. . . ... . . . .. ...... ... . .. . ... 3-18
3-16 Servo Board Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
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