Tandy 1000 Technical Reference Manual

Tandy 1000
Technical Reference Manual
the track alignment according to the following procedure.
i) Loosen the two fixing screws of the stepping motor a little.
ii) Insert a common screwdriver from the back side of the FDD as shown
in Fig.426 and depress it to the geared area of the steppint motor.
iii) Key in "E3" and adjust the misalignment so that the DATA indicator
[]][I] (\) shows the smallest value. The stepping motor moves
little by little by the screwdriver.
iv) For a double sided FDD, repeat the adjusting operation in item iii)
alternately for side 0 and side 1 heads until the both misalignment
take the smallest value.
v) Tighten the two fixing screws of the stepping motor little by
little to obtain the value within ±20\ on the DATA indicator when
the screws are tightened with the following specified torque.
Stepping motor fixing torque: 9Kg.cm.
vi) Remove the alignment disk.
vii) Apply a drop of locking paint to the screw head of the stepping
motor fixing screws.
viii) Check and adjust the track 00 sensor according to item 4-4-11.
ix) Check and adjust the track 00 stopper according to item 4-4-12.
(p) Release the Invert and Add modes of the oscilloscope.
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Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200