Tandy 1000 Technical Reference Manual

Tandy 1000
SECTION 4 MAINTENANCE
Title
Technical Reference Manual
Page
4000
4-1 GENERAL ..................•••..••.••........•........•.......••...•. 4001
4-1-1
4-1-2
Periodic Maintenance
Check and Adjustment
4001
4002
4-1-3 Maintenance Parts Replacement •.......••...•...•..•......•.....•• 4003
4-1-4 Maintenance Jigs and Tools .....•.•.......•.••..•......••........ 4007
4-2 PRECAUTIONS ..........••.............•.......•...•.....•..•.....•. , 4010
4-2-1 Torque Applied to Screws and Locking Paint .•..........•.....•... 4010
4-2-2 Handling of Connectors ............•........•....••..•........... 4011
4-2-3 Head Cable Treatment .................•....•.•.•...•....•......•• 4016
4-2-4
Initial Setting of SKA
4018
4-2-4-1 Cable connection and setting of power supply voltage 4018
4-2-4-2 Setting of the maximum track number .....•..•...•.......•...... 4021
4-2-4-3 Setting of step rate and settling time ........•.........•..... 4022
4-2-4-4 Level disk calibration ..•.••.•....•........................... 4024
4-2-4-5 Alignment disk calibration .......................•.......•.... 4026
4-2-4-6 Humidity setting ..........•.......••....•....................• 4029
4-2-4-7 Setting of SKA gain .....................•.....•...••.......... 4029
4-2-5 Others .........•.........•.....•..................•.......•..... 4030
4-3
PREVENTIVE MAINTENANCE
4033
4-3-1 Cleaning of Magnetic Head by Cleaning Disk .•.............•.....• 4033
4-3-2 Direct Cleaning (Single sided FDD only) ...•.................•... 4035
4-4 CHECK AND ADJUSTMENT ......••..•.•......•.......•...........•...•.. 4037
4-4-1 Adjustment of Collet Shaft Plate ...•.......•......•...••........ 4037
4-4-2 Adjustment of Front Lever Position 4039
4-4-3 Check and Adjustment of Disk Pad Lever (Bail) ......•...•..... '" 4041
Check and Adjustment
of Disk Rotation Speed
......................... O'
4047
Check and
Adjustment of
Head
Touch
.... .......... ..........................
4049
Check and
Adjustment of
Asymmetry .......... O' ................................
4055
Check of
Read
Level ...................... ..........
..............................
4060
4-4-4
4-4-5
4-4-6
4-4-7
4-4-8
4-4-9
Check of File Protect Sensor
Check of Resolution
4044
4063
4-4-10 Check and Adjustment of Track Alignment .. , ............•.......• 4066
- iii -

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