Tandy 1000 Technical Reference Manual

Tandy 1000
TP7,TP8(ADD)
Technical Reference Manual
~lFV\JV2F
IF
2F
(Fig.424) Measurement of resolution
Resolution (true value)
V2F/VIF x lOa/Calibration value (\)
(i) Confirm that the true value is within the following range.
Innermost track resolution: 55\, Min.
(j) For a double sided FDD, execute items (d) through (i) for the side a
and the side 1 heads respectively.
(k) If the value in item (i) or (j) is out of the specified range,
following causes are assumed.
i) Inferior disk:
Disk and/or jacket is deformed or damaged. Replace the level
disk with a new one.
ii) Inferior disk rotational speed:
Check and adjust according to item 4-4-5.
iii) Inferior head touch:
Check and adjust according to item 4-4-6.
iv) Inferior head: Replace the head carriage Ass'y according to item
4-5-1.
v) Inferior PCBA MFD control:
Replace the PCBA MFD control according to item 4-5-6.
(L) Eject the level disk and 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