Tandy 1000 Technical Reference Manual

Tandy 1000
4-4-10. Check and Adjustment of Track Alignment
(A) Equipment
(1) Cross point screwdriver, H3
(2) Common screwdriver, medium
(3) Alignment disk
(4) ,SKA or user's system
(5) Oscilloscope
(6) Hygrometer.
(7) Locking paint
(B) Check and adjustment procedure
Technical Reference Manual
Note: Check and adjustment of track alignment should be done in an
environment of general room temperature and humidity. Even if the
environmental condition is within the specified operational condition,
extreemly high or low temperature, or extreemly high or low humidity
should be avoided. Check and adjustment should be done after two
hours, Hin. of storing in the above mentioned condition.
It is recommended that the orientation of the FDD for the track
alignment check is the same as when the FDD is actually installed
in the user's system.
(1) General method
(a) Use two channels of an oscilloscope and connect them to TP9 and TP10
(Differentiation amp.) on the PCBA HFD control. Also connect
the external trigger of the oscilloscope to TP4 (Index) and apply
positive trigger.
Oscilloscope range AC mode, 0.5V, 20msec
Set both channels, and 2 to the above range. Set either of the
channels to Invert mode and Add both channels.
- 4066 -

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