Tandy 1000 Technical Reference Manual

Tandy 1000
Technical Reference Manual
(b) For the observation at the other test point:
Connect the probe ground to the G test point (OV) on the PCBA MFD
control. Or GND (OV) terminal of the system power supply unit, or
the SKA GND terminal may be used.
(c) For the observation of the SKA test point:
Connect the probe ground to the SKA GND terminal.
Note: When you use the SKA, almost all checks including the read amp.
output at TP7 ~ TPIO of the FDD will be done automatically through
the check cables _1 and _2 and interface cable. Also these signals
can be observed by an oscilloscope using the test points on the SKA.
(4) Maintenance environment
Maintenance of the FDD should be done on a clean bench at room
temperature and humidity. It is recommended to execute the check and
adjustment of the track alignment after leaving the FDD for at least
2 hours at room temperature and humidity. The magnetic head, disk,
steel belt, etc. might suffer from dust and dirt if the maintenance is
not undertaken in a clean environment.
(5) Orientation of the FDD
Position the FDD as shown in Fig.4l1 unless otherwise specified.
Horizontal and vertical orientations with lever side up should be used.
(6) Head load
The FD-54 series have no head load solenoid. They are always in head
load condition as far as a disk is inserted and the front lever is
closed.
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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