Tandy 1000 Technical Reference Manual

Tandy 1000
4-4-4. Check of File Protect Sensor
(A) Equipment
(1) MAX media jig (Jig D)
(2) Digital voltmeter (or oscilloscope)
(3) SKA or user's system
(B) Check procedure
(1) General method
Technical Reference Manual
(a) Place the FDD on the work bench with the LED indicator up and the
front lever down. (See Fig.42l).
(b) Connect a digital voltmeter or an oscilloscope (DC range,lV/div)
to TP6 (File protect sensor) on the PCBA MFD control.
(c) Install the MAX media jig as in Fig.42l and set it so that the
notch A area is located on the light pass from the file protect
sensor.
(d) Adjust the orientation of the FDD so that it is not exposed with
strong light outside.
(e) Confirm that the voltage measured at TP6 when power is supplied to
the FDD is within the following range.
Notch A position TP6 voltage: O.SV, Max.
(f) Pullout the jig a little so that the notch B area is located on the
light pass.
(g) Confirm that the voltage measured at TP6 when power is supplied to
the FDD is within the following range.
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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